Root/
Source at commit 0de2b2b3be81048189a32f7a3d3ba0ba9ec817b6 created 11 years 11 months ago. By Maarten ter Huurne, MIPS: JZ4740: Fixed value for round robin constant. | |
---|---|
1 | /* sun4c.c: Doing in software what should be done in hardware. |
2 | * |
3 | * Copyright (C) 1996 David S. Miller (davem@davemloft.net) |
4 | * Copyright (C) 1996 Eddie C. Dost (ecd@skynet.be) |
5 | * Copyright (C) 1996 Andrew Tridgell (Andrew.Tridgell@anu.edu.au) |
6 | * Copyright (C) 1997-2000 Anton Blanchard (anton@samba.org) |
7 | * Copyright (C) 1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz) |
8 | */ |
9 | |
10 | #define NR_TASK_BUCKETS 512 |
11 | |
12 | #include <linux/kernel.h> |
13 | #include <linux/mm.h> |
14 | #include <linux/init.h> |
15 | #include <linux/slab.h> |
16 | #include <linux/bootmem.h> |
17 | #include <linux/highmem.h> |
18 | #include <linux/fs.h> |
19 | #include <linux/seq_file.h> |
20 | #include <linux/scatterlist.h> |
21 | #include <linux/bitmap.h> |
22 | |
23 | #include <asm/sections.h> |
24 | #include <asm/page.h> |
25 | #include <asm/pgalloc.h> |
26 | #include <asm/pgtable.h> |
27 | #include <asm/vaddrs.h> |
28 | #include <asm/idprom.h> |
29 | #include <asm/machines.h> |
30 | #include <asm/memreg.h> |
31 | #include <asm/processor.h> |
32 | #include <asm/auxio.h> |
33 | #include <asm/io.h> |
34 | #include <asm/oplib.h> |
35 | #include <asm/openprom.h> |
36 | #include <asm/mmu_context.h> |
37 | #include <asm/highmem.h> |
38 | #include <asm/btfixup.h> |
39 | #include <asm/cacheflush.h> |
40 | #include <asm/tlbflush.h> |
41 | |
42 | /* Because of our dynamic kernel TLB miss strategy, and how |
43 | * our DVMA mapping allocation works, you _MUST_: |
44 | * |
45 | * 1) Disable interrupts _and_ not touch any dynamic kernel |
46 | * memory while messing with kernel MMU state. By |
47 | * dynamic memory I mean any object which is not in |
48 | * the kernel image itself or a thread_union (both of |
49 | * which are locked into the MMU). |
50 | * 2) Disable interrupts while messing with user MMU state. |
51 | */ |
52 | |
53 | extern int num_segmaps, num_contexts; |
54 | |
55 | extern unsigned long page_kernel; |
56 | |
57 | /* That's it, we prom_halt() on sun4c if the cache size is something other than 65536. |
58 | * So let's save some cycles and just use that everywhere except for that bootup |
59 | * sanity check. |
60 | */ |
61 | #define SUN4C_VAC_SIZE 65536 |
62 | |
63 | #define SUN4C_KERNEL_BUCKETS 32 |
64 | |
65 | /* Flushing the cache. */ |
66 | struct sun4c_vac_props sun4c_vacinfo; |
67 | unsigned long sun4c_kernel_faults; |
68 | |
69 | /* Invalidate every sun4c cache line tag. */ |
70 | static void __init sun4c_flush_all(void) |
71 | { |
72 | unsigned long begin, end; |
73 | |
74 | if (sun4c_vacinfo.on) |
75 | panic("SUN4C: AIEEE, trying to invalidate vac while it is on."); |
76 | |
77 | /* Clear 'valid' bit in all cache line tags */ |
78 | begin = AC_CACHETAGS; |
79 | end = (AC_CACHETAGS + SUN4C_VAC_SIZE); |
80 | while (begin < end) { |
81 | __asm__ __volatile__("sta %%g0, [%0] %1\n\t" : : |
82 | "r" (begin), "i" (ASI_CONTROL)); |
83 | begin += sun4c_vacinfo.linesize; |
84 | } |
85 | } |
86 | |
87 | static void sun4c_flush_context_hw(void) |
88 | { |
89 | unsigned long end = SUN4C_VAC_SIZE; |
90 | |
91 | __asm__ __volatile__( |
92 | "1: addcc %0, -4096, %0\n\t" |
93 | " bne 1b\n\t" |
94 | " sta %%g0, [%0] %2" |
95 | : "=&r" (end) |
96 | : "0" (end), "i" (ASI_HWFLUSHCONTEXT) |
97 | : "cc"); |
98 | } |
99 | |
100 | /* Must be called minimally with IRQs disabled. */ |
101 | static void sun4c_flush_segment_hw(unsigned long addr) |
102 | { |
103 | if (sun4c_get_segmap(addr) != invalid_segment) { |
104 | unsigned long vac_size = SUN4C_VAC_SIZE; |
105 | |
106 | __asm__ __volatile__( |
107 | "1: addcc %0, -4096, %0\n\t" |
108 | " bne 1b\n\t" |
109 | " sta %%g0, [%2 + %0] %3" |
110 | : "=&r" (vac_size) |
111 | : "0" (vac_size), "r" (addr), "i" (ASI_HWFLUSHSEG) |
112 | : "cc"); |
113 | } |
114 | } |
115 | |
116 | /* File local boot time fixups. */ |
117 | BTFIXUPDEF_CALL(void, sun4c_flush_page, unsigned long) |
118 | BTFIXUPDEF_CALL(void, sun4c_flush_segment, unsigned long) |
119 | BTFIXUPDEF_CALL(void, sun4c_flush_context, void) |
120 | |
121 | #define sun4c_flush_page(addr) BTFIXUP_CALL(sun4c_flush_page)(addr) |
122 | #define sun4c_flush_segment(addr) BTFIXUP_CALL(sun4c_flush_segment)(addr) |
123 | #define sun4c_flush_context() BTFIXUP_CALL(sun4c_flush_context)() |
124 | |
125 | /* Must be called minimally with interrupts disabled. */ |
126 | static void sun4c_flush_page_hw(unsigned long addr) |
127 | { |
128 | addr &= PAGE_MASK; |
129 | if ((int)sun4c_get_pte(addr) < 0) |
130 | __asm__ __volatile__("sta %%g0, [%0] %1" |
131 | : : "r" (addr), "i" (ASI_HWFLUSHPAGE)); |
132 | } |
133 | |
134 | /* Don't inline the software version as it eats too many cache lines if expanded. */ |
135 | static void sun4c_flush_context_sw(void) |
136 | { |
137 | unsigned long nbytes = SUN4C_VAC_SIZE; |
138 | unsigned long lsize = sun4c_vacinfo.linesize; |
139 | |
140 | __asm__ __volatile__( |
141 | "add %2, %2, %%g1\n\t" |
142 | "add %2, %%g1, %%g2\n\t" |
143 | "add %2, %%g2, %%g3\n\t" |
144 | "add %2, %%g3, %%g4\n\t" |
145 | "add %2, %%g4, %%g5\n\t" |
146 | "add %2, %%g5, %%o4\n\t" |
147 | "add %2, %%o4, %%o5\n" |
148 | "1:\n\t" |
149 | "subcc %0, %%o5, %0\n\t" |
150 | "sta %%g0, [%0] %3\n\t" |
151 | "sta %%g0, [%0 + %2] %3\n\t" |
152 | "sta %%g0, [%0 + %%g1] %3\n\t" |
153 | "sta %%g0, [%0 + %%g2] %3\n\t" |
154 | "sta %%g0, [%0 + %%g3] %3\n\t" |
155 | "sta %%g0, [%0 + %%g4] %3\n\t" |
156 | "sta %%g0, [%0 + %%g5] %3\n\t" |
157 | "bg 1b\n\t" |
158 | " sta %%g0, [%1 + %%o4] %3\n" |
159 | : "=&r" (nbytes) |
160 | : "0" (nbytes), "r" (lsize), "i" (ASI_FLUSHCTX) |
161 | : "g1", "g2", "g3", "g4", "g5", "o4", "o5", "cc"); |
162 | } |
163 | |
164 | /* Don't inline the software version as it eats too many cache lines if expanded. */ |
165 | static void sun4c_flush_segment_sw(unsigned long addr) |
166 | { |
167 | if (sun4c_get_segmap(addr) != invalid_segment) { |
168 | unsigned long nbytes = SUN4C_VAC_SIZE; |
169 | unsigned long lsize = sun4c_vacinfo.linesize; |
170 | |
171 | __asm__ __volatile__( |
172 | "add %2, %2, %%g1\n\t" |
173 | "add %2, %%g1, %%g2\n\t" |
174 | "add %2, %%g2, %%g3\n\t" |
175 | "add %2, %%g3, %%g4\n\t" |
176 | "add %2, %%g4, %%g5\n\t" |
177 | "add %2, %%g5, %%o4\n\t" |
178 | "add %2, %%o4, %%o5\n" |
179 | "1:\n\t" |
180 | "subcc %1, %%o5, %1\n\t" |
181 | "sta %%g0, [%0] %6\n\t" |
182 | "sta %%g0, [%0 + %2] %6\n\t" |
183 | "sta %%g0, [%0 + %%g1] %6\n\t" |
184 | "sta %%g0, [%0 + %%g2] %6\n\t" |
185 | "sta %%g0, [%0 + %%g3] %6\n\t" |
186 | "sta %%g0, [%0 + %%g4] %6\n\t" |
187 | "sta %%g0, [%0 + %%g5] %6\n\t" |
188 | "sta %%g0, [%0 + %%o4] %6\n\t" |
189 | "bg 1b\n\t" |
190 | " add %0, %%o5, %0\n" |
191 | : "=&r" (addr), "=&r" (nbytes), "=&r" (lsize) |
192 | : "0" (addr), "1" (nbytes), "2" (lsize), |
193 | "i" (ASI_FLUSHSEG) |
194 | : "g1", "g2", "g3", "g4", "g5", "o4", "o5", "cc"); |
195 | } |
196 | } |
197 | |
198 | /* Don't inline the software version as it eats too many cache lines if expanded. */ |
199 | static void sun4c_flush_page_sw(unsigned long addr) |
200 | { |
201 | addr &= PAGE_MASK; |
202 | if ((sun4c_get_pte(addr) & (_SUN4C_PAGE_NOCACHE | _SUN4C_PAGE_VALID)) == |
203 | _SUN4C_PAGE_VALID) { |
204 | unsigned long left = PAGE_SIZE; |
205 | unsigned long lsize = sun4c_vacinfo.linesize; |
206 | |
207 | __asm__ __volatile__( |
208 | "add %2, %2, %%g1\n\t" |
209 | "add %2, %%g1, %%g2\n\t" |
210 | "add %2, %%g2, %%g3\n\t" |
211 | "add %2, %%g3, %%g4\n\t" |
212 | "add %2, %%g4, %%g5\n\t" |
213 | "add %2, %%g5, %%o4\n\t" |
214 | "add %2, %%o4, %%o5\n" |
215 | "1:\n\t" |
216 | "subcc %1, %%o5, %1\n\t" |
217 | "sta %%g0, [%0] %6\n\t" |
218 | "sta %%g0, [%0 + %2] %6\n\t" |
219 | "sta %%g0, [%0 + %%g1] %6\n\t" |
220 | "sta %%g0, [%0 + %%g2] %6\n\t" |
221 | "sta %%g0, [%0 + %%g3] %6\n\t" |
222 | "sta %%g0, [%0 + %%g4] %6\n\t" |
223 | "sta %%g0, [%0 + %%g5] %6\n\t" |
224 | "sta %%g0, [%0 + %%o4] %6\n\t" |
225 | "bg 1b\n\t" |
226 | " add %0, %%o5, %0\n" |
227 | : "=&r" (addr), "=&r" (left), "=&r" (lsize) |
228 | : "0" (addr), "1" (left), "2" (lsize), |
229 | "i" (ASI_FLUSHPG) |
230 | : "g1", "g2", "g3", "g4", "g5", "o4", "o5", "cc"); |
231 | } |
232 | } |
233 | |
234 | /* The sun4c's do have an on chip store buffer. And the way you |
235 | * clear them out isn't so obvious. The only way I can think of |
236 | * to accomplish this is to read the current context register, |
237 | * store the same value there, then read an external hardware |
238 | * register. |
239 | */ |
240 | void sun4c_complete_all_stores(void) |
241 | { |
242 | volatile int _unused; |
243 | |
244 | _unused = sun4c_get_context(); |
245 | sun4c_set_context(_unused); |
246 | _unused = get_auxio(); |
247 | } |
248 | |
249 | /* Bootup utility functions. */ |
250 | static inline void sun4c_init_clean_segmap(unsigned char pseg) |
251 | { |
252 | unsigned long vaddr; |
253 | |
254 | sun4c_put_segmap(0, pseg); |
255 | for (vaddr = 0; vaddr < SUN4C_REAL_PGDIR_SIZE; vaddr += PAGE_SIZE) |
256 | sun4c_put_pte(vaddr, 0); |
257 | sun4c_put_segmap(0, invalid_segment); |
258 | } |
259 | |
260 | static inline void sun4c_init_clean_mmu(unsigned long kernel_end) |
261 | { |
262 | unsigned long vaddr; |
263 | unsigned char savectx, ctx; |
264 | |
265 | savectx = sun4c_get_context(); |
266 | for (ctx = 0; ctx < num_contexts; ctx++) { |
267 | sun4c_set_context(ctx); |
268 | for (vaddr = 0; vaddr < 0x20000000; vaddr += SUN4C_REAL_PGDIR_SIZE) |
269 | sun4c_put_segmap(vaddr, invalid_segment); |
270 | for (vaddr = 0xe0000000; vaddr < KERNBASE; vaddr += SUN4C_REAL_PGDIR_SIZE) |
271 | sun4c_put_segmap(vaddr, invalid_segment); |
272 | for (vaddr = kernel_end; vaddr < KADB_DEBUGGER_BEGVM; vaddr += SUN4C_REAL_PGDIR_SIZE) |
273 | sun4c_put_segmap(vaddr, invalid_segment); |
274 | for (vaddr = LINUX_OPPROM_ENDVM; vaddr; vaddr += SUN4C_REAL_PGDIR_SIZE) |
275 | sun4c_put_segmap(vaddr, invalid_segment); |
276 | } |
277 | sun4c_set_context(savectx); |
278 | } |
279 | |
280 | void __init sun4c_probe_vac(void) |
281 | { |
282 | sun4c_disable_vac(); |
283 | |
284 | if ((idprom->id_machtype == (SM_SUN4C | SM_4C_SS1)) || |
285 | (idprom->id_machtype == (SM_SUN4C | SM_4C_SS1PLUS))) { |
286 | /* PROM on SS1 lacks this info, to be super safe we |
287 | * hard code it here since this arch is cast in stone. |
288 | */ |
289 | sun4c_vacinfo.num_bytes = 65536; |
290 | sun4c_vacinfo.linesize = 16; |
291 | } else { |
292 | sun4c_vacinfo.num_bytes = |
293 | prom_getintdefault(prom_root_node, "vac-size", 65536); |
294 | sun4c_vacinfo.linesize = |
295 | prom_getintdefault(prom_root_node, "vac-linesize", 16); |
296 | } |
297 | sun4c_vacinfo.do_hwflushes = |
298 | prom_getintdefault(prom_root_node, "vac-hwflush", 0); |
299 | |
300 | if (sun4c_vacinfo.do_hwflushes == 0) |
301 | sun4c_vacinfo.do_hwflushes = |
302 | prom_getintdefault(prom_root_node, "vac_hwflush", 0); |
303 | |
304 | if (sun4c_vacinfo.num_bytes != 65536) { |
305 | prom_printf("WEIRD Sun4C VAC cache size, " |
306 | "tell sparclinux@vger.kernel.org"); |
307 | prom_halt(); |
308 | } |
309 | |
310 | switch (sun4c_vacinfo.linesize) { |
311 | case 16: |
312 | sun4c_vacinfo.log2lsize = 4; |
313 | break; |
314 | case 32: |
315 | sun4c_vacinfo.log2lsize = 5; |
316 | break; |
317 | default: |
318 | prom_printf("probe_vac: Didn't expect vac-linesize of %d, halting\n", |
319 | sun4c_vacinfo.linesize); |
320 | prom_halt(); |
321 | } |
322 | |
323 | sun4c_flush_all(); |
324 | sun4c_enable_vac(); |
325 | } |
326 | |
327 | /* Patch instructions for the low level kernel fault handler. */ |
328 | extern unsigned long invalid_segment_patch1, invalid_segment_patch1_ff; |
329 | extern unsigned long invalid_segment_patch2, invalid_segment_patch2_ff; |
330 | extern unsigned long invalid_segment_patch1_1ff, invalid_segment_patch2_1ff; |
331 | extern unsigned long num_context_patch1, num_context_patch1_16; |
332 | extern unsigned long num_context_patch2_16; |
333 | extern unsigned long vac_linesize_patch, vac_linesize_patch_32; |
334 | extern unsigned long vac_hwflush_patch1, vac_hwflush_patch1_on; |
335 | extern unsigned long vac_hwflush_patch2, vac_hwflush_patch2_on; |
336 | |
337 | #define PATCH_INSN(src, dst) do { \ |
338 | daddr = &(dst); \ |
339 | iaddr = &(src); \ |
340 | *daddr = *iaddr; \ |
341 | } while (0) |
342 | |
343 | static void __init patch_kernel_fault_handler(void) |
344 | { |
345 | unsigned long *iaddr, *daddr; |
346 | |
347 | switch (num_segmaps) { |
348 | case 128: |
349 | /* Default, nothing to do. */ |
350 | break; |
351 | case 256: |
352 | PATCH_INSN(invalid_segment_patch1_ff, |
353 | invalid_segment_patch1); |
354 | PATCH_INSN(invalid_segment_patch2_ff, |
355 | invalid_segment_patch2); |
356 | break; |
357 | case 512: |
358 | PATCH_INSN(invalid_segment_patch1_1ff, |
359 | invalid_segment_patch1); |
360 | PATCH_INSN(invalid_segment_patch2_1ff, |
361 | invalid_segment_patch2); |
362 | break; |
363 | default: |
364 | prom_printf("Unhandled number of segmaps: %d\n", |
365 | num_segmaps); |
366 | prom_halt(); |
367 | } |
368 | switch (num_contexts) { |
369 | case 8: |
370 | /* Default, nothing to do. */ |
371 | break; |
372 | case 16: |
373 | PATCH_INSN(num_context_patch1_16, |
374 | num_context_patch1); |
375 | break; |
376 | default: |
377 | prom_printf("Unhandled number of contexts: %d\n", |
378 | num_contexts); |
379 | prom_halt(); |
380 | } |
381 | |
382 | if (sun4c_vacinfo.do_hwflushes != 0) { |
383 | PATCH_INSN(vac_hwflush_patch1_on, vac_hwflush_patch1); |
384 | PATCH_INSN(vac_hwflush_patch2_on, vac_hwflush_patch2); |
385 | } else { |
386 | switch (sun4c_vacinfo.linesize) { |
387 | case 16: |
388 | /* Default, nothing to do. */ |
389 | break; |
390 | case 32: |
391 | PATCH_INSN(vac_linesize_patch_32, vac_linesize_patch); |
392 | break; |
393 | default: |
394 | prom_printf("Impossible VAC linesize %d, halting...\n", |
395 | sun4c_vacinfo.linesize); |
396 | prom_halt(); |
397 | } |
398 | } |
399 | } |
400 | |
401 | static void __init sun4c_probe_mmu(void) |
402 | { |
403 | if ((idprom->id_machtype == (SM_SUN4C | SM_4C_SS1)) || |
404 | (idprom->id_machtype == (SM_SUN4C | SM_4C_SS1PLUS))) { |
405 | /* Hardcode these just to be safe, PROM on SS1 does |
406 | * not have this info available in the root node. |
407 | */ |
408 | num_segmaps = 128; |
409 | num_contexts = 8; |
410 | } else { |
411 | num_segmaps = |
412 | prom_getintdefault(prom_root_node, "mmu-npmg", 128); |
413 | num_contexts = |
414 | prom_getintdefault(prom_root_node, "mmu-nctx", 0x8); |
415 | } |
416 | patch_kernel_fault_handler(); |
417 | } |
418 | |
419 | volatile unsigned long __iomem *sun4c_memerr_reg = NULL; |
420 | |
421 | void __init sun4c_probe_memerr_reg(void) |
422 | { |
423 | phandle node; |
424 | struct linux_prom_registers regs[1]; |
425 | |
426 | node = prom_getchild(prom_root_node); |
427 | node = prom_searchsiblings(prom_root_node, "memory-error"); |
428 | if (!node) |
429 | return; |
430 | if (prom_getproperty(node, "reg", (char *)regs, sizeof(regs)) <= 0) |
431 | return; |
432 | /* hmm I think regs[0].which_io is zero here anyways */ |
433 | sun4c_memerr_reg = ioremap(regs[0].phys_addr, regs[0].reg_size); |
434 | } |
435 | |
436 | static inline void sun4c_init_ss2_cache_bug(void) |
437 | { |
438 | if ((idprom->id_machtype == (SM_SUN4C | SM_4C_SS2)) || |
439 | (idprom->id_machtype == (SM_SUN4C | SM_4C_IPX)) || |
440 | (idprom->id_machtype == (SM_SUN4C | SM_4C_ELC))) { |
441 | /* Whee.. */ |
442 | printk("SS2 cache bug detected, uncaching trap table page\n"); |
443 | sun4c_flush_page((unsigned int) &_start); |
444 | sun4c_put_pte(((unsigned long) &_start), |
445 | (sun4c_get_pte((unsigned long) &_start) | _SUN4C_PAGE_NOCACHE)); |
446 | } |
447 | } |
448 | |
449 | /* Addr is always aligned on a page boundary for us already. */ |
450 | static int sun4c_map_dma_area(struct device *dev, dma_addr_t *pba, unsigned long va, |
451 | unsigned long addr, int len) |
452 | { |
453 | unsigned long page, end; |
454 | |
455 | *pba = addr; |
456 | |
457 | end = PAGE_ALIGN((addr + len)); |
458 | while (addr < end) { |
459 | page = va; |
460 | sun4c_flush_page(page); |
461 | page -= PAGE_OFFSET; |
462 | page >>= PAGE_SHIFT; |
463 | page |= (_SUN4C_PAGE_VALID | _SUN4C_PAGE_DIRTY | |
464 | _SUN4C_PAGE_NOCACHE | _SUN4C_PAGE_PRIV); |
465 | sun4c_put_pte(addr, page); |
466 | addr += PAGE_SIZE; |
467 | va += PAGE_SIZE; |
468 | } |
469 | |
470 | return 0; |
471 | } |
472 | |
473 | static void sun4c_unmap_dma_area(struct device *dev, unsigned long busa, int len) |
474 | { |
475 | /* Fortunately for us, bus_addr == uncached_virt in sun4c. */ |
476 | /* XXX Implement this */ |
477 | } |
478 | |
479 | /* TLB management. */ |
480 | |
481 | /* Don't change this struct without changing entry.S. This is used |
482 | * in the in-window kernel fault handler, and you don't want to mess |
483 | * with that. (See sun4c_fault in entry.S). |
484 | */ |
485 | struct sun4c_mmu_entry { |
486 | struct sun4c_mmu_entry *next; |
487 | struct sun4c_mmu_entry *prev; |
488 | unsigned long vaddr; |
489 | unsigned char pseg; |
490 | unsigned char locked; |
491 | |
492 | /* For user mappings only, and completely hidden from kernel |
493 | * TLB miss code. |
494 | */ |
495 | unsigned char ctx; |
496 | struct sun4c_mmu_entry *lru_next; |
497 | struct sun4c_mmu_entry *lru_prev; |
498 | }; |
499 | |
500 | static struct sun4c_mmu_entry mmu_entry_pool[SUN4C_MAX_SEGMAPS]; |
501 | |
502 | static void __init sun4c_init_mmu_entry_pool(void) |
503 | { |
504 | int i; |
505 | |
506 | for (i=0; i < SUN4C_MAX_SEGMAPS; i++) { |
507 | mmu_entry_pool[i].pseg = i; |
508 | mmu_entry_pool[i].next = NULL; |
509 | mmu_entry_pool[i].prev = NULL; |
510 | mmu_entry_pool[i].vaddr = 0; |
511 | mmu_entry_pool[i].locked = 0; |
512 | mmu_entry_pool[i].ctx = 0; |
513 | mmu_entry_pool[i].lru_next = NULL; |
514 | mmu_entry_pool[i].lru_prev = NULL; |
515 | } |
516 | mmu_entry_pool[invalid_segment].locked = 1; |
517 | } |
518 | |
519 | static inline void fix_permissions(unsigned long vaddr, unsigned long bits_on, |
520 | unsigned long bits_off) |
521 | { |
522 | unsigned long start, end; |
523 | |
524 | end = vaddr + SUN4C_REAL_PGDIR_SIZE; |
525 | for (start = vaddr; start < end; start += PAGE_SIZE) |
526 | if (sun4c_get_pte(start) & _SUN4C_PAGE_VALID) |
527 | sun4c_put_pte(start, (sun4c_get_pte(start) | bits_on) & |
528 | ~bits_off); |
529 | } |
530 | |
531 | static inline void sun4c_init_map_kernelprom(unsigned long kernel_end) |
532 | { |
533 | unsigned long vaddr; |
534 | unsigned char pseg, ctx; |
535 | |
536 | for (vaddr = KADB_DEBUGGER_BEGVM; |
537 | vaddr < LINUX_OPPROM_ENDVM; |
538 | vaddr += SUN4C_REAL_PGDIR_SIZE) { |
539 | pseg = sun4c_get_segmap(vaddr); |
540 | if (pseg != invalid_segment) { |
541 | mmu_entry_pool[pseg].locked = 1; |
542 | for (ctx = 0; ctx < num_contexts; ctx++) |
543 | prom_putsegment(ctx, vaddr, pseg); |
544 | fix_permissions(vaddr, _SUN4C_PAGE_PRIV, 0); |
545 | } |
546 | } |
547 | |
548 | for (vaddr = KERNBASE; vaddr < kernel_end; vaddr += SUN4C_REAL_PGDIR_SIZE) { |
549 | pseg = sun4c_get_segmap(vaddr); |
550 | mmu_entry_pool[pseg].locked = 1; |
551 | for (ctx = 0; ctx < num_contexts; ctx++) |
552 | prom_putsegment(ctx, vaddr, pseg); |
553 | fix_permissions(vaddr, _SUN4C_PAGE_PRIV, _SUN4C_PAGE_NOCACHE); |
554 | } |
555 | } |
556 | |
557 | static void __init sun4c_init_lock_area(unsigned long start, unsigned long end) |
558 | { |
559 | int i, ctx; |
560 | |
561 | while (start < end) { |
562 | for (i = 0; i < invalid_segment; i++) |
563 | if (!mmu_entry_pool[i].locked) |
564 | break; |
565 | mmu_entry_pool[i].locked = 1; |
566 | sun4c_init_clean_segmap(i); |
567 | for (ctx = 0; ctx < num_contexts; ctx++) |
568 | prom_putsegment(ctx, start, mmu_entry_pool[i].pseg); |
569 | start += SUN4C_REAL_PGDIR_SIZE; |
570 | } |
571 | } |
572 | |
573 | /* Don't change this struct without changing entry.S. This is used |
574 | * in the in-window kernel fault handler, and you don't want to mess |
575 | * with that. (See sun4c_fault in entry.S). |
576 | */ |
577 | struct sun4c_mmu_ring { |
578 | struct sun4c_mmu_entry ringhd; |
579 | int num_entries; |
580 | }; |
581 | |
582 | static struct sun4c_mmu_ring sun4c_context_ring[SUN4C_MAX_CONTEXTS]; /* used user entries */ |
583 | static struct sun4c_mmu_ring sun4c_ufree_ring; /* free user entries */ |
584 | static struct sun4c_mmu_ring sun4c_ulru_ring; /* LRU user entries */ |
585 | struct sun4c_mmu_ring sun4c_kernel_ring; /* used kernel entries */ |
586 | struct sun4c_mmu_ring sun4c_kfree_ring; /* free kernel entries */ |
587 | |
588 | static inline void sun4c_init_rings(void) |
589 | { |
590 | int i; |
591 | |
592 | for (i = 0; i < SUN4C_MAX_CONTEXTS; i++) { |
593 | sun4c_context_ring[i].ringhd.next = |
594 | sun4c_context_ring[i].ringhd.prev = |
595 | &sun4c_context_ring[i].ringhd; |
596 | sun4c_context_ring[i].num_entries = 0; |
597 | } |
598 | sun4c_ufree_ring.ringhd.next = sun4c_ufree_ring.ringhd.prev = |
599 | &sun4c_ufree_ring.ringhd; |
600 | sun4c_ufree_ring.num_entries = 0; |
601 | sun4c_ulru_ring.ringhd.lru_next = sun4c_ulru_ring.ringhd.lru_prev = |
602 | &sun4c_ulru_ring.ringhd; |
603 | sun4c_ulru_ring.num_entries = 0; |
604 | sun4c_kernel_ring.ringhd.next = sun4c_kernel_ring.ringhd.prev = |
605 | &sun4c_kernel_ring.ringhd; |
606 | sun4c_kernel_ring.num_entries = 0; |
607 | sun4c_kfree_ring.ringhd.next = sun4c_kfree_ring.ringhd.prev = |
608 | &sun4c_kfree_ring.ringhd; |
609 | sun4c_kfree_ring.num_entries = 0; |
610 | } |
611 | |
612 | static void add_ring(struct sun4c_mmu_ring *ring, |
613 | struct sun4c_mmu_entry *entry) |
614 | { |
615 | struct sun4c_mmu_entry *head = &ring->ringhd; |
616 | |
617 | entry->prev = head; |
618 | (entry->next = head->next)->prev = entry; |
619 | head->next = entry; |
620 | ring->num_entries++; |
621 | } |
622 | |
623 | static inline void add_lru(struct sun4c_mmu_entry *entry) |
624 | { |
625 | struct sun4c_mmu_ring *ring = &sun4c_ulru_ring; |
626 | struct sun4c_mmu_entry *head = &ring->ringhd; |
627 | |
628 | entry->lru_next = head; |
629 | (entry->lru_prev = head->lru_prev)->lru_next = entry; |
630 | head->lru_prev = entry; |
631 | } |
632 | |
633 | static void add_ring_ordered(struct sun4c_mmu_ring *ring, |
634 | struct sun4c_mmu_entry *entry) |
635 | { |
636 | struct sun4c_mmu_entry *head = &ring->ringhd; |
637 | unsigned long addr = entry->vaddr; |
638 | |
639 | while ((head->next != &ring->ringhd) && (head->next->vaddr < addr)) |
640 | head = head->next; |
641 | |
642 | entry->prev = head; |
643 | (entry->next = head->next)->prev = entry; |
644 | head->next = entry; |
645 | ring->num_entries++; |
646 | |
647 | add_lru(entry); |
648 | } |
649 | |
650 | static inline void remove_ring(struct sun4c_mmu_ring *ring, |
651 | struct sun4c_mmu_entry *entry) |
652 | { |
653 | struct sun4c_mmu_entry *next = entry->next; |
654 | |
655 | (next->prev = entry->prev)->next = next; |
656 | ring->num_entries--; |
657 | } |
658 | |
659 | static void remove_lru(struct sun4c_mmu_entry *entry) |
660 | { |
661 | struct sun4c_mmu_entry *next = entry->lru_next; |
662 | |
663 | (next->lru_prev = entry->lru_prev)->lru_next = next; |
664 | } |
665 | |
666 | static void free_user_entry(int ctx, struct sun4c_mmu_entry *entry) |
667 | { |
668 | remove_ring(sun4c_context_ring+ctx, entry); |
669 | remove_lru(entry); |
670 | add_ring(&sun4c_ufree_ring, entry); |
671 | } |
672 | |
673 | static void free_kernel_entry(struct sun4c_mmu_entry *entry, |
674 | struct sun4c_mmu_ring *ring) |
675 | { |
676 | remove_ring(ring, entry); |
677 | add_ring(&sun4c_kfree_ring, entry); |
678 | } |
679 | |
680 | static void __init sun4c_init_fill_kernel_ring(int howmany) |
681 | { |
682 | int i; |
683 | |
684 | while (howmany) { |
685 | for (i = 0; i < invalid_segment; i++) |
686 | if (!mmu_entry_pool[i].locked) |
687 | break; |
688 | mmu_entry_pool[i].locked = 1; |
689 | sun4c_init_clean_segmap(i); |
690 | add_ring(&sun4c_kfree_ring, &mmu_entry_pool[i]); |
691 | howmany--; |
692 | } |
693 | } |
694 | |
695 | static void __init sun4c_init_fill_user_ring(void) |
696 | { |
697 | int i; |
698 | |
699 | for (i = 0; i < invalid_segment; i++) { |
700 | if (mmu_entry_pool[i].locked) |
701 | continue; |
702 | sun4c_init_clean_segmap(i); |
703 | add_ring(&sun4c_ufree_ring, &mmu_entry_pool[i]); |
704 | } |
705 | } |
706 | |
707 | static void sun4c_kernel_unmap(struct sun4c_mmu_entry *kentry) |
708 | { |
709 | int savectx, ctx; |
710 | |
711 | savectx = sun4c_get_context(); |
712 | for (ctx = 0; ctx < num_contexts; ctx++) { |
713 | sun4c_set_context(ctx); |
714 | sun4c_put_segmap(kentry->vaddr, invalid_segment); |
715 | } |
716 | sun4c_set_context(savectx); |
717 | } |
718 | |
719 | static void sun4c_kernel_map(struct sun4c_mmu_entry *kentry) |
720 | { |
721 | int savectx, ctx; |
722 | |
723 | savectx = sun4c_get_context(); |
724 | for (ctx = 0; ctx < num_contexts; ctx++) { |
725 | sun4c_set_context(ctx); |
726 | sun4c_put_segmap(kentry->vaddr, kentry->pseg); |
727 | } |
728 | sun4c_set_context(savectx); |
729 | } |
730 | |
731 | #define sun4c_user_unmap(__entry) \ |
732 | sun4c_put_segmap((__entry)->vaddr, invalid_segment) |
733 | |
734 | static void sun4c_demap_context(struct sun4c_mmu_ring *crp, unsigned char ctx) |
735 | { |
736 | struct sun4c_mmu_entry *head = &crp->ringhd; |
737 | unsigned long flags; |
738 | |
739 | local_irq_save(flags); |
740 | if (head->next != head) { |
741 | struct sun4c_mmu_entry *entry = head->next; |
742 | int savectx = sun4c_get_context(); |
743 | |
744 | flush_user_windows(); |
745 | sun4c_set_context(ctx); |
746 | sun4c_flush_context(); |
747 | do { |
748 | struct sun4c_mmu_entry *next = entry->next; |
749 | |
750 | sun4c_user_unmap(entry); |
751 | free_user_entry(ctx, entry); |
752 | |
753 | entry = next; |
754 | } while (entry != head); |
755 | sun4c_set_context(savectx); |
756 | } |
757 | local_irq_restore(flags); |
758 | } |
759 | |
760 | static int sun4c_user_taken_entries; /* This is how much we have. */ |
761 | static int max_user_taken_entries; /* This limits us and prevents deadlock. */ |
762 | |
763 | static struct sun4c_mmu_entry *sun4c_kernel_strategy(void) |
764 | { |
765 | struct sun4c_mmu_entry *this_entry; |
766 | |
767 | /* If some are free, return first one. */ |
768 | if (sun4c_kfree_ring.num_entries) { |
769 | this_entry = sun4c_kfree_ring.ringhd.next; |
770 | return this_entry; |
771 | } |
772 | |
773 | /* Else free one up. */ |
774 | this_entry = sun4c_kernel_ring.ringhd.prev; |
775 | sun4c_flush_segment(this_entry->vaddr); |
776 | sun4c_kernel_unmap(this_entry); |
777 | free_kernel_entry(this_entry, &sun4c_kernel_ring); |
778 | this_entry = sun4c_kfree_ring.ringhd.next; |
779 | |
780 | return this_entry; |
781 | } |
782 | |
783 | /* Using this method to free up mmu entries eliminates a lot of |
784 | * potential races since we have a kernel that incurs tlb |
785 | * replacement faults. There may be performance penalties. |
786 | * |
787 | * NOTE: Must be called with interrupts disabled. |
788 | */ |
789 | static struct sun4c_mmu_entry *sun4c_user_strategy(void) |
790 | { |
791 | struct sun4c_mmu_entry *entry; |
792 | unsigned char ctx; |
793 | int savectx; |
794 | |
795 | /* If some are free, return first one. */ |
796 | if (sun4c_ufree_ring.num_entries) { |
797 | entry = sun4c_ufree_ring.ringhd.next; |
798 | goto unlink_out; |
799 | } |
800 | |
801 | if (sun4c_user_taken_entries) { |
802 | entry = sun4c_kernel_strategy(); |
803 | sun4c_user_taken_entries--; |
804 | goto kunlink_out; |
805 | } |
806 | |
807 | /* Grab from the beginning of the LRU list. */ |
808 | entry = sun4c_ulru_ring.ringhd.lru_next; |
809 | ctx = entry->ctx; |
810 | |
811 | savectx = sun4c_get_context(); |
812 | flush_user_windows(); |
813 | sun4c_set_context(ctx); |
814 | sun4c_flush_segment(entry->vaddr); |
815 | sun4c_user_unmap(entry); |
816 | remove_ring(sun4c_context_ring + ctx, entry); |
817 | remove_lru(entry); |
818 | sun4c_set_context(savectx); |
819 | |
820 | return entry; |
821 | |
822 | unlink_out: |
823 | remove_ring(&sun4c_ufree_ring, entry); |
824 | return entry; |
825 | kunlink_out: |
826 | remove_ring(&sun4c_kfree_ring, entry); |
827 | return entry; |
828 | } |
829 | |
830 | /* NOTE: Must be called with interrupts disabled. */ |
831 | void sun4c_grow_kernel_ring(void) |
832 | { |
833 | struct sun4c_mmu_entry *entry; |
834 | |
835 | /* Prevent deadlock condition. */ |
836 | if (sun4c_user_taken_entries >= max_user_taken_entries) |
837 | return; |
838 | |
839 | if (sun4c_ufree_ring.num_entries) { |
840 | entry = sun4c_ufree_ring.ringhd.next; |
841 | remove_ring(&sun4c_ufree_ring, entry); |
842 | add_ring(&sun4c_kfree_ring, entry); |
843 | sun4c_user_taken_entries++; |
844 | } |
845 | } |
846 | |
847 | /* 2 page buckets for task struct and kernel stack allocation. |
848 | * |
849 | * TASK_STACK_BEGIN |
850 | * bucket[0] |
851 | * bucket[1] |
852 | * [ ... ] |
853 | * bucket[NR_TASK_BUCKETS-1] |
854 | * TASK_STACK_BEGIN + (sizeof(struct task_bucket) * NR_TASK_BUCKETS) |
855 | * |
856 | * Each slot looks like: |
857 | * |
858 | * page 1 -- task struct + beginning of kernel stack |
859 | * page 2 -- rest of kernel stack |
860 | */ |
861 | |
862 | union task_union *sun4c_bucket[NR_TASK_BUCKETS]; |
863 | |
864 | static int sun4c_lowbucket_avail; |
865 | |
866 | #define BUCKET_EMPTY ((union task_union *) 0) |
867 | #define BUCKET_SHIFT (PAGE_SHIFT + 1) /* log2(sizeof(struct task_bucket)) */ |
868 | #define BUCKET_SIZE (1 << BUCKET_SHIFT) |
869 | #define BUCKET_NUM(addr) ((((addr) - SUN4C_LOCK_VADDR) >> BUCKET_SHIFT)) |
870 | #define BUCKET_ADDR(num) (((num) << BUCKET_SHIFT) + SUN4C_LOCK_VADDR) |
871 | #define BUCKET_PTE(page) \ |
872 | ((((page) - PAGE_OFFSET) >> PAGE_SHIFT) | pgprot_val(SUN4C_PAGE_KERNEL)) |
873 | #define BUCKET_PTE_PAGE(pte) \ |
874 | (PAGE_OFFSET + (((pte) & SUN4C_PFN_MASK) << PAGE_SHIFT)) |
875 | |
876 | static void get_locked_segment(unsigned long addr) |
877 | { |
878 | struct sun4c_mmu_entry *stolen; |
879 | unsigned long flags; |
880 | |
881 | local_irq_save(flags); |
882 | addr &= SUN4C_REAL_PGDIR_MASK; |
883 | stolen = sun4c_user_strategy(); |
884 | max_user_taken_entries--; |
885 | stolen->vaddr = addr; |
886 | flush_user_windows(); |
887 | sun4c_kernel_map(stolen); |
888 | local_irq_restore(flags); |
889 | } |
890 | |
891 | static void free_locked_segment(unsigned long addr) |
892 | { |
893 | struct sun4c_mmu_entry *entry; |
894 | unsigned long flags; |
895 | unsigned char pseg; |
896 | |
897 | local_irq_save(flags); |
898 | addr &= SUN4C_REAL_PGDIR_MASK; |
899 | pseg = sun4c_get_segmap(addr); |
900 | entry = &mmu_entry_pool[pseg]; |
901 | |
902 | flush_user_windows(); |
903 | sun4c_flush_segment(addr); |
904 | sun4c_kernel_unmap(entry); |
905 | add_ring(&sun4c_ufree_ring, entry); |
906 | max_user_taken_entries++; |
907 | local_irq_restore(flags); |
908 | } |
909 | |
910 | static inline void garbage_collect(int entry) |
911 | { |
912 | int start, end; |
913 | |
914 | /* 32 buckets per segment... */ |
915 | entry &= ~31; |
916 | start = entry; |
917 | for (end = (start + 32); start < end; start++) |
918 | if (sun4c_bucket[start] != BUCKET_EMPTY) |
919 | return; |
920 | |
921 | /* Entire segment empty, release it. */ |
922 | free_locked_segment(BUCKET_ADDR(entry)); |
923 | } |
924 | |
925 | static struct thread_info *sun4c_alloc_thread_info_node(int node) |
926 | { |
927 | unsigned long addr, pages; |
928 | int entry; |
929 | |
930 | pages = __get_free_pages(GFP_KERNEL, THREAD_INFO_ORDER); |
931 | if (!pages) |
932 | return NULL; |
933 | |
934 | for (entry = sun4c_lowbucket_avail; entry < NR_TASK_BUCKETS; entry++) |
935 | if (sun4c_bucket[entry] == BUCKET_EMPTY) |
936 | break; |
937 | if (entry == NR_TASK_BUCKETS) { |
938 | free_pages(pages, THREAD_INFO_ORDER); |
939 | return NULL; |
940 | } |
941 | if (entry >= sun4c_lowbucket_avail) |
942 | sun4c_lowbucket_avail = entry + 1; |
943 | |
944 | addr = BUCKET_ADDR(entry); |
945 | sun4c_bucket[entry] = (union task_union *) addr; |
946 | if(sun4c_get_segmap(addr) == invalid_segment) |
947 | get_locked_segment(addr); |
948 | |
949 | /* We are changing the virtual color of the page(s) |
950 | * so we must flush the cache to guarantee consistency. |
951 | */ |
952 | sun4c_flush_page(pages); |
953 | sun4c_flush_page(pages + PAGE_SIZE); |
954 | |
955 | sun4c_put_pte(addr, BUCKET_PTE(pages)); |
956 | sun4c_put_pte(addr + PAGE_SIZE, BUCKET_PTE(pages + PAGE_SIZE)); |
957 | |
958 | #ifdef CONFIG_DEBUG_STACK_USAGE |
959 | memset((void *)addr, 0, PAGE_SIZE << THREAD_INFO_ORDER); |
960 | #endif /* DEBUG_STACK_USAGE */ |
961 | |
962 | return (struct thread_info *) addr; |
963 | } |
964 | |
965 | static void sun4c_free_thread_info(struct thread_info *ti) |
966 | { |
967 | unsigned long tiaddr = (unsigned long) ti; |
968 | unsigned long pages = BUCKET_PTE_PAGE(sun4c_get_pte(tiaddr)); |
969 | int entry = BUCKET_NUM(tiaddr); |
970 | |
971 | /* We are deleting a mapping, so the flush here is mandatory. */ |
972 | sun4c_flush_page(tiaddr); |
973 | sun4c_flush_page(tiaddr + PAGE_SIZE); |
974 | |
975 | sun4c_put_pte(tiaddr, 0); |
976 | sun4c_put_pte(tiaddr + PAGE_SIZE, 0); |
977 | |
978 | sun4c_bucket[entry] = BUCKET_EMPTY; |
979 | if (entry < sun4c_lowbucket_avail) |
980 | sun4c_lowbucket_avail = entry; |
981 | |
982 | free_pages(pages, THREAD_INFO_ORDER); |
983 | garbage_collect(entry); |
984 | } |
985 | |
986 | static void __init sun4c_init_buckets(void) |
987 | { |
988 | int entry; |
989 | |
990 | if (sizeof(union thread_union) != (PAGE_SIZE << THREAD_INFO_ORDER)) { |
991 | extern void thread_info_size_is_bolixed_pete(void); |
992 | thread_info_size_is_bolixed_pete(); |
993 | } |
994 | |
995 | for (entry = 0; entry < NR_TASK_BUCKETS; entry++) |
996 | sun4c_bucket[entry] = BUCKET_EMPTY; |
997 | sun4c_lowbucket_avail = 0; |
998 | } |
999 | |
1000 | static unsigned long sun4c_iobuffer_start; |
1001 | static unsigned long sun4c_iobuffer_end; |
1002 | static unsigned long sun4c_iobuffer_high; |
1003 | static unsigned long *sun4c_iobuffer_map; |
1004 | static int iobuffer_map_size; |
1005 | |
1006 | /* |
1007 | * Alias our pages so they do not cause a trap. |
1008 | * Also one page may be aliased into several I/O areas and we may |
1009 | * finish these I/O separately. |
1010 | */ |
1011 | static char *sun4c_lockarea(char *vaddr, unsigned long size) |
1012 | { |
1013 | unsigned long base, scan; |
1014 | unsigned long npages; |
1015 | unsigned long vpage; |
1016 | unsigned long pte; |
1017 | unsigned long apage; |
1018 | unsigned long high; |
1019 | unsigned long flags; |
1020 | |
1021 | npages = (((unsigned long)vaddr & ~PAGE_MASK) + |
1022 | size + (PAGE_SIZE-1)) >> PAGE_SHIFT; |
1023 | |
1024 | local_irq_save(flags); |
1025 | base = bitmap_find_next_zero_area(sun4c_iobuffer_map, iobuffer_map_size, |
1026 | 0, npages, 0); |
1027 | if (base >= iobuffer_map_size) |
1028 | goto abend; |
1029 | |
1030 | high = ((base + npages) << PAGE_SHIFT) + sun4c_iobuffer_start; |
1031 | high = SUN4C_REAL_PGDIR_ALIGN(high); |
1032 | while (high > sun4c_iobuffer_high) { |
1033 | get_locked_segment(sun4c_iobuffer_high); |
1034 | sun4c_iobuffer_high += SUN4C_REAL_PGDIR_SIZE; |
1035 | } |
1036 | |
1037 | vpage = ((unsigned long) vaddr) & PAGE_MASK; |
1038 | for (scan = base; scan < base+npages; scan++) { |
1039 | pte = ((vpage-PAGE_OFFSET) >> PAGE_SHIFT); |
1040 | pte |= pgprot_val(SUN4C_PAGE_KERNEL); |
1041 | pte |= _SUN4C_PAGE_NOCACHE; |
1042 | set_bit(scan, sun4c_iobuffer_map); |
1043 | apage = (scan << PAGE_SHIFT) + sun4c_iobuffer_start; |
1044 | |
1045 | /* Flush original mapping so we see the right things later. */ |
1046 | sun4c_flush_page(vpage); |
1047 | |
1048 | sun4c_put_pte(apage, pte); |
1049 | vpage += PAGE_SIZE; |
1050 | } |
1051 | local_irq_restore(flags); |
1052 | return (char *) ((base << PAGE_SHIFT) + sun4c_iobuffer_start + |
1053 | (((unsigned long) vaddr) & ~PAGE_MASK)); |
1054 | |
1055 | abend: |
1056 | local_irq_restore(flags); |
1057 | printk("DMA vaddr=0x%p size=%08lx\n", vaddr, size); |
1058 | panic("Out of iobuffer table"); |
1059 | return NULL; |
1060 | } |
1061 | |
1062 | static void sun4c_unlockarea(char *vaddr, unsigned long size) |
1063 | { |
1064 | unsigned long vpage, npages; |
1065 | unsigned long flags; |
1066 | int scan, high; |
1067 | |
1068 | vpage = (unsigned long)vaddr & PAGE_MASK; |
1069 | npages = (((unsigned long)vaddr & ~PAGE_MASK) + |
1070 | size + (PAGE_SIZE-1)) >> PAGE_SHIFT; |
1071 | |
1072 | local_irq_save(flags); |
1073 | while (npages != 0) { |
1074 | --npages; |
1075 | |
1076 | /* This mapping is marked non-cachable, no flush necessary. */ |
1077 | sun4c_put_pte(vpage, 0); |
1078 | clear_bit((vpage - sun4c_iobuffer_start) >> PAGE_SHIFT, |
1079 | sun4c_iobuffer_map); |
1080 | vpage += PAGE_SIZE; |
1081 | } |
1082 | |
1083 | /* garbage collect */ |
1084 | scan = (sun4c_iobuffer_high - sun4c_iobuffer_start) >> PAGE_SHIFT; |
1085 | while (scan >= 0 && !sun4c_iobuffer_map[scan >> 5]) |
1086 | scan -= 32; |
1087 | scan += 32; |
1088 | high = sun4c_iobuffer_start + (scan << PAGE_SHIFT); |
1089 | high = SUN4C_REAL_PGDIR_ALIGN(high) + SUN4C_REAL_PGDIR_SIZE; |
1090 | while (high < sun4c_iobuffer_high) { |
1091 | sun4c_iobuffer_high -= SUN4C_REAL_PGDIR_SIZE; |
1092 | free_locked_segment(sun4c_iobuffer_high); |
1093 | } |
1094 | local_irq_restore(flags); |
1095 | } |
1096 | |
1097 | /* Note the scsi code at init time passes to here buffers |
1098 | * which sit on the kernel stack, those are already locked |
1099 | * by implication and fool the page locking code above |
1100 | * if passed to by mistake. |
1101 | */ |
1102 | static __u32 sun4c_get_scsi_one(struct device *dev, char *bufptr, unsigned long len) |
1103 | { |
1104 | unsigned long page; |
1105 | |
1106 | page = ((unsigned long)bufptr) & PAGE_MASK; |
1107 | if (!virt_addr_valid(page)) { |
1108 | sun4c_flush_page(page); |
1109 | return (__u32)bufptr; /* already locked */ |
1110 | } |
1111 | return (__u32)sun4c_lockarea(bufptr, len); |
1112 | } |
1113 | |
1114 | static void sun4c_get_scsi_sgl(struct device *dev, struct scatterlist *sg, int sz) |
1115 | { |
1116 | while (sz != 0) { |
1117 | --sz; |
1118 | sg->dma_address = (__u32)sun4c_lockarea(sg_virt(sg), sg->length); |
1119 | sg->dma_length = sg->length; |
1120 | sg = sg_next(sg); |
1121 | } |
1122 | } |
1123 | |
1124 | static void sun4c_release_scsi_one(struct device *dev, __u32 bufptr, unsigned long len) |
1125 | { |
1126 | if (bufptr < sun4c_iobuffer_start) |
1127 | return; /* On kernel stack or similar, see above */ |
1128 | sun4c_unlockarea((char *)bufptr, len); |
1129 | } |
1130 | |
1131 | static void sun4c_release_scsi_sgl(struct device *dev, struct scatterlist *sg, int sz) |
1132 | { |
1133 | while (sz != 0) { |
1134 | --sz; |
1135 | sun4c_unlockarea((char *)sg->dma_address, sg->length); |
1136 | sg = sg_next(sg); |
1137 | } |
1138 | } |
1139 | |
1140 | #define TASK_ENTRY_SIZE BUCKET_SIZE /* see above */ |
1141 | #define LONG_ALIGN(x) (((x)+(sizeof(long))-1)&~((sizeof(long))-1)) |
1142 | |
1143 | struct vm_area_struct sun4c_kstack_vma; |
1144 | |
1145 | static void __init sun4c_init_lock_areas(void) |
1146 | { |
1147 | unsigned long sun4c_taskstack_start; |
1148 | unsigned long sun4c_taskstack_end; |
1149 | int bitmap_size; |
1150 | |
1151 | sun4c_init_buckets(); |
1152 | sun4c_taskstack_start = SUN4C_LOCK_VADDR; |
1153 | sun4c_taskstack_end = (sun4c_taskstack_start + |
1154 | (TASK_ENTRY_SIZE * NR_TASK_BUCKETS)); |
1155 | if (sun4c_taskstack_end >= SUN4C_LOCK_END) { |
1156 | prom_printf("Too many tasks, decrease NR_TASK_BUCKETS please.\n"); |
1157 | prom_halt(); |
1158 | } |
1159 | |
1160 | sun4c_iobuffer_start = sun4c_iobuffer_high = |
1161 | SUN4C_REAL_PGDIR_ALIGN(sun4c_taskstack_end); |
1162 | sun4c_iobuffer_end = SUN4C_LOCK_END; |
1163 | bitmap_size = (sun4c_iobuffer_end - sun4c_iobuffer_start) >> PAGE_SHIFT; |
1164 | bitmap_size = (bitmap_size + 7) >> 3; |
1165 | bitmap_size = LONG_ALIGN(bitmap_size); |
1166 | iobuffer_map_size = bitmap_size << 3; |
1167 | sun4c_iobuffer_map = __alloc_bootmem(bitmap_size, SMP_CACHE_BYTES, 0UL); |
1168 | memset((void *) sun4c_iobuffer_map, 0, bitmap_size); |
1169 | |
1170 | sun4c_kstack_vma.vm_mm = &init_mm; |
1171 | sun4c_kstack_vma.vm_start = sun4c_taskstack_start; |
1172 | sun4c_kstack_vma.vm_end = sun4c_taskstack_end; |
1173 | sun4c_kstack_vma.vm_page_prot = PAGE_SHARED; |
1174 | sun4c_kstack_vma.vm_flags = VM_READ | VM_WRITE | VM_EXEC; |
1175 | insert_vm_struct(&init_mm, &sun4c_kstack_vma); |
1176 | } |
1177 | |
1178 | /* Cache flushing on the sun4c. */ |
1179 | static void sun4c_flush_cache_all(void) |
1180 | { |
1181 | unsigned long begin, end; |
1182 | |
1183 | flush_user_windows(); |
1184 | begin = (KERNBASE + SUN4C_REAL_PGDIR_SIZE); |
1185 | end = (begin + SUN4C_VAC_SIZE); |
1186 | |
1187 | if (sun4c_vacinfo.linesize == 32) { |
1188 | while (begin < end) { |
1189 | __asm__ __volatile__( |
1190 | "ld [%0 + 0x00], %%g0\n\t" |
1191 | "ld [%0 + 0x20], %%g0\n\t" |
1192 | "ld [%0 + 0x40], %%g0\n\t" |
1193 | "ld [%0 + 0x60], %%g0\n\t" |
1194 | "ld [%0 + 0x80], %%g0\n\t" |
1195 | "ld [%0 + 0xa0], %%g0\n\t" |
1196 | "ld [%0 + 0xc0], %%g0\n\t" |
1197 | "ld [%0 + 0xe0], %%g0\n\t" |
1198 | "ld [%0 + 0x100], %%g0\n\t" |
1199 | "ld [%0 + 0x120], %%g0\n\t" |
1200 | "ld [%0 + 0x140], %%g0\n\t" |
1201 | "ld [%0 + 0x160], %%g0\n\t" |
1202 | "ld [%0 + 0x180], %%g0\n\t" |
1203 | "ld [%0 + 0x1a0], %%g0\n\t" |
1204 | "ld [%0 + 0x1c0], %%g0\n\t" |
1205 | "ld [%0 + 0x1e0], %%g0\n" |
1206 | : : "r" (begin)); |
1207 | begin += 512; |
1208 | } |
1209 | } else { |
1210 | while (begin < end) { |
1211 | __asm__ __volatile__( |
1212 | "ld [%0 + 0x00], %%g0\n\t" |
1213 | "ld [%0 + 0x10], %%g0\n\t" |
1214 | "ld [%0 + 0x20], %%g0\n\t" |
1215 | "ld [%0 + 0x30], %%g0\n\t" |
1216 | "ld [%0 + 0x40], %%g0\n\t" |
1217 | "ld [%0 + 0x50], %%g0\n\t" |
1218 | "ld [%0 + 0x60], %%g0\n\t" |
1219 | "ld [%0 + 0x70], %%g0\n\t" |
1220 | "ld [%0 + 0x80], %%g0\n\t" |
1221 | "ld [%0 + 0x90], %%g0\n\t" |
1222 | "ld [%0 + 0xa0], %%g0\n\t" |
1223 | "ld [%0 + 0xb0], %%g0\n\t" |
1224 | "ld [%0 + 0xc0], %%g0\n\t" |
1225 | "ld [%0 + 0xd0], %%g0\n\t" |
1226 | "ld [%0 + 0xe0], %%g0\n\t" |
1227 | "ld [%0 + 0xf0], %%g0\n" |
1228 | : : "r" (begin)); |
1229 | begin += 256; |
1230 | } |
1231 | } |
1232 | } |
1233 | |
1234 | static void sun4c_flush_cache_mm(struct mm_struct *mm) |
1235 | { |
1236 | int new_ctx = mm->context; |
1237 | |
1238 | if (new_ctx != NO_CONTEXT) { |
1239 | flush_user_windows(); |
1240 | |
1241 | if (sun4c_context_ring[new_ctx].num_entries) { |
1242 | struct sun4c_mmu_entry *head = &sun4c_context_ring[new_ctx].ringhd; |
1243 | unsigned long flags; |
1244 | |
1245 | local_irq_save(flags); |
1246 | if (head->next != head) { |
1247 | struct sun4c_mmu_entry *entry = head->next; |
1248 | int savectx = sun4c_get_context(); |
1249 | |
1250 | sun4c_set_context(new_ctx); |
1251 | sun4c_flush_context(); |
1252 | do { |
1253 | struct sun4c_mmu_entry *next = entry->next; |
1254 | |
1255 | sun4c_user_unmap(entry); |
1256 | free_user_entry(new_ctx, entry); |
1257 | |
1258 | entry = next; |
1259 | } while (entry != head); |
1260 | sun4c_set_context(savectx); |
1261 | } |
1262 | local_irq_restore(flags); |
1263 | } |
1264 | } |
1265 | } |
1266 | |
1267 | static void sun4c_flush_cache_range(struct vm_area_struct *vma, unsigned long start, unsigned long end) |
1268 | { |
1269 | struct mm_struct *mm = vma->vm_mm; |
1270 | int new_ctx = mm->context; |
1271 | |
1272 | if (new_ctx != NO_CONTEXT) { |
1273 | struct sun4c_mmu_entry *head = &sun4c_context_ring[new_ctx].ringhd; |
1274 | struct sun4c_mmu_entry *entry; |
1275 | unsigned long flags; |
1276 | |
1277 | flush_user_windows(); |
1278 | |
1279 | local_irq_save(flags); |
1280 | /* All user segmap chains are ordered on entry->vaddr. */ |
1281 | for (entry = head->next; |
1282 | (entry != head) && ((entry->vaddr+SUN4C_REAL_PGDIR_SIZE) < start); |
1283 | entry = entry->next) |
1284 | ; |
1285 | |
1286 | /* Tracing various job mixtures showed that this conditional |
1287 | * only passes ~35% of the time for most worse case situations, |
1288 | * therefore we avoid all of this gross overhead ~65% of the time. |
1289 | */ |
1290 | if ((entry != head) && (entry->vaddr < end)) { |
1291 | int octx = sun4c_get_context(); |
1292 | sun4c_set_context(new_ctx); |
1293 | |
1294 | /* At this point, always, (start >= entry->vaddr) and |
1295 | * (entry->vaddr < end), once the latter condition |
1296 | * ceases to hold, or we hit the end of the list, we |
1297 | * exit the loop. The ordering of all user allocated |
1298 | * segmaps makes this all work out so beautifully. |
1299 | */ |
1300 | do { |
1301 | struct sun4c_mmu_entry *next = entry->next; |
1302 | unsigned long realend; |
1303 | |
1304 | /* "realstart" is always >= entry->vaddr */ |
1305 | realend = entry->vaddr + SUN4C_REAL_PGDIR_SIZE; |
1306 | if (end < realend) |
1307 | realend = end; |
1308 | if ((realend - entry->vaddr) <= (PAGE_SIZE << 3)) { |
1309 | unsigned long page = entry->vaddr; |
1310 | while (page < realend) { |
1311 | sun4c_flush_page(page); |
1312 | page += PAGE_SIZE; |
1313 | } |
1314 | } else { |
1315 | sun4c_flush_segment(entry->vaddr); |
1316 | sun4c_user_unmap(entry); |
1317 | free_user_entry(new_ctx, entry); |
1318 | } |
1319 | entry = next; |
1320 | } while ((entry != head) && (entry->vaddr < end)); |
1321 | sun4c_set_context(octx); |
1322 | } |
1323 | local_irq_restore(flags); |
1324 | } |
1325 | } |
1326 | |
1327 | static void sun4c_flush_cache_page(struct vm_area_struct *vma, unsigned long page) |
1328 | { |
1329 | struct mm_struct *mm = vma->vm_mm; |
1330 | int new_ctx = mm->context; |
1331 | |
1332 | /* Sun4c has no separate I/D caches so cannot optimize for non |
1333 | * text page flushes. |
1334 | */ |
1335 | if (new_ctx != NO_CONTEXT) { |
1336 | int octx = sun4c_get_context(); |
1337 | unsigned long flags; |
1338 | |
1339 | flush_user_windows(); |
1340 | local_irq_save(flags); |
1341 | sun4c_set_context(new_ctx); |
1342 | sun4c_flush_page(page); |
1343 | sun4c_set_context(octx); |
1344 | local_irq_restore(flags); |
1345 | } |
1346 | } |
1347 | |
1348 | static void sun4c_flush_page_to_ram(unsigned long page) |
1349 | { |
1350 | unsigned long flags; |
1351 | |
1352 | local_irq_save(flags); |
1353 | sun4c_flush_page(page); |
1354 | local_irq_restore(flags); |
1355 | } |
1356 | |
1357 | /* Sun4c cache is unified, both instructions and data live there, so |
1358 | * no need to flush the on-stack instructions for new signal handlers. |
1359 | */ |
1360 | static void sun4c_flush_sig_insns(struct mm_struct *mm, unsigned long insn_addr) |
1361 | { |
1362 | } |
1363 | |
1364 | /* TLB flushing on the sun4c. These routines count on the cache |
1365 | * flushing code to flush the user register windows so that we need |
1366 | * not do so when we get here. |
1367 | */ |
1368 | |
1369 | static void sun4c_flush_tlb_all(void) |
1370 | { |
1371 | struct sun4c_mmu_entry *this_entry, *next_entry; |
1372 | unsigned long flags; |
1373 | int savectx, ctx; |
1374 | |
1375 | local_irq_save(flags); |
1376 | this_entry = sun4c_kernel_ring.ringhd.next; |
1377 | savectx = sun4c_get_context(); |
1378 | flush_user_windows(); |
1379 | while (sun4c_kernel_ring.num_entries) { |
1380 | next_entry = this_entry->next; |
1381 | sun4c_flush_segment(this_entry->vaddr); |
1382 | for (ctx = 0; ctx < num_contexts; ctx++) { |
1383 | sun4c_set_context(ctx); |
1384 | sun4c_put_segmap(this_entry->vaddr, invalid_segment); |
1385 | } |
1386 | free_kernel_entry(this_entry, &sun4c_kernel_ring); |
1387 | this_entry = next_entry; |
1388 | } |
1389 | sun4c_set_context(savectx); |
1390 | local_irq_restore(flags); |
1391 | } |
1392 | |
1393 | static void sun4c_flush_tlb_mm(struct mm_struct *mm) |
1394 | { |
1395 | int new_ctx = mm->context; |
1396 | |
1397 | if (new_ctx != NO_CONTEXT) { |
1398 | struct sun4c_mmu_entry *head = &sun4c_context_ring[new_ctx].ringhd; |
1399 | unsigned long flags; |
1400 | |
1401 | local_irq_save(flags); |
1402 | if (head->next != head) { |
1403 | struct sun4c_mmu_entry *entry = head->next; |
1404 | int savectx = sun4c_get_context(); |
1405 | |
1406 | sun4c_set_context(new_ctx); |
1407 | sun4c_flush_context(); |
1408 | do { |
1409 | struct sun4c_mmu_entry *next = entry->next; |
1410 | |
1411 | sun4c_user_unmap(entry); |
1412 | free_user_entry(new_ctx, entry); |
1413 | |
1414 | entry = next; |
1415 | } while (entry != head); |
1416 | sun4c_set_context(savectx); |
1417 | } |
1418 | local_irq_restore(flags); |
1419 | } |
1420 | } |
1421 | |
1422 | static void sun4c_flush_tlb_range(struct vm_area_struct *vma, unsigned long start, unsigned long end) |
1423 | { |
1424 | struct mm_struct *mm = vma->vm_mm; |
1425 | int new_ctx = mm->context; |
1426 | |
1427 | if (new_ctx != NO_CONTEXT) { |
1428 | struct sun4c_mmu_entry *head = &sun4c_context_ring[new_ctx].ringhd; |
1429 | struct sun4c_mmu_entry *entry; |
1430 | unsigned long flags; |
1431 | |
1432 | local_irq_save(flags); |
1433 | /* See commentary in sun4c_flush_cache_range(). */ |
1434 | for (entry = head->next; |
1435 | (entry != head) && ((entry->vaddr+SUN4C_REAL_PGDIR_SIZE) < start); |
1436 | entry = entry->next) |
1437 | ; |
1438 | |
1439 | if ((entry != head) && (entry->vaddr < end)) { |
1440 | int octx = sun4c_get_context(); |
1441 | |
1442 | sun4c_set_context(new_ctx); |
1443 | do { |
1444 | struct sun4c_mmu_entry *next = entry->next; |
1445 | |
1446 | sun4c_flush_segment(entry->vaddr); |
1447 | sun4c_user_unmap(entry); |
1448 | free_user_entry(new_ctx, entry); |
1449 | |
1450 | entry = next; |
1451 | } while ((entry != head) && (entry->vaddr < end)); |
1452 | sun4c_set_context(octx); |
1453 | } |
1454 | local_irq_restore(flags); |
1455 | } |
1456 | } |
1457 | |
1458 | static void sun4c_flush_tlb_page(struct vm_area_struct *vma, unsigned long page) |
1459 | { |
1460 | struct mm_struct *mm = vma->vm_mm; |
1461 | int new_ctx = mm->context; |
1462 | |
1463 | if (new_ctx != NO_CONTEXT) { |
1464 | int savectx = sun4c_get_context(); |
1465 | unsigned long flags; |
1466 | |
1467 | local_irq_save(flags); |
1468 | sun4c_set_context(new_ctx); |
1469 | page &= PAGE_MASK; |
1470 | sun4c_flush_page(page); |
1471 | sun4c_put_pte(page, 0); |
1472 | sun4c_set_context(savectx); |
1473 | local_irq_restore(flags); |
1474 | } |
1475 | } |
1476 | |
1477 | static inline void sun4c_mapioaddr(unsigned long physaddr, unsigned long virt_addr) |
1478 | { |
1479 | unsigned long page_entry, pg_iobits; |
1480 | |
1481 | pg_iobits = _SUN4C_PAGE_PRESENT | _SUN4C_READABLE | _SUN4C_WRITEABLE | |
1482 | _SUN4C_PAGE_IO | _SUN4C_PAGE_NOCACHE; |
1483 | |
1484 | page_entry = ((physaddr >> PAGE_SHIFT) & SUN4C_PFN_MASK); |
1485 | page_entry |= ((pg_iobits | _SUN4C_PAGE_PRIV) & ~(_SUN4C_PAGE_PRESENT)); |
1486 | sun4c_put_pte(virt_addr, page_entry); |
1487 | } |
1488 | |
1489 | static void sun4c_mapiorange(unsigned int bus, unsigned long xpa, |
1490 | unsigned long xva, unsigned int len) |
1491 | { |
1492 | while (len != 0) { |
1493 | len -= PAGE_SIZE; |
1494 | sun4c_mapioaddr(xpa, xva); |
1495 | xva += PAGE_SIZE; |
1496 | xpa += PAGE_SIZE; |
1497 | } |
1498 | } |
1499 | |
1500 | static void sun4c_unmapiorange(unsigned long virt_addr, unsigned int len) |
1501 | { |
1502 | while (len != 0) { |
1503 | len -= PAGE_SIZE; |
1504 | sun4c_put_pte(virt_addr, 0); |
1505 | virt_addr += PAGE_SIZE; |
1506 | } |
1507 | } |
1508 | |
1509 | static void sun4c_alloc_context(struct mm_struct *old_mm, struct mm_struct *mm) |
1510 | { |
1511 | struct ctx_list *ctxp; |
1512 | |
1513 | ctxp = ctx_free.next; |
1514 | if (ctxp != &ctx_free) { |
1515 | remove_from_ctx_list(ctxp); |
1516 | add_to_used_ctxlist(ctxp); |
1517 | mm->context = ctxp->ctx_number; |
1518 | ctxp->ctx_mm = mm; |
1519 | return; |
1520 | } |
1521 | ctxp = ctx_used.next; |
1522 | if (ctxp->ctx_mm == old_mm) |
1523 | ctxp = ctxp->next; |
1524 | remove_from_ctx_list(ctxp); |
1525 | add_to_used_ctxlist(ctxp); |
1526 | ctxp->ctx_mm->context = NO_CONTEXT; |
1527 | ctxp->ctx_mm = mm; |
1528 | mm->context = ctxp->ctx_number; |
1529 | sun4c_demap_context(&sun4c_context_ring[ctxp->ctx_number], |
1530 | ctxp->ctx_number); |
1531 | } |
1532 | |
1533 | /* Switch the current MM context. */ |
1534 | static void sun4c_switch_mm(struct mm_struct *old_mm, struct mm_struct *mm, struct task_struct *tsk, int cpu) |
1535 | { |
1536 | struct ctx_list *ctx; |
1537 | int dirty = 0; |
1538 | |
1539 | if (mm->context == NO_CONTEXT) { |
1540 | dirty = 1; |
1541 | sun4c_alloc_context(old_mm, mm); |
1542 | } else { |
1543 | /* Update the LRU ring of contexts. */ |
1544 | ctx = ctx_list_pool + mm->context; |
1545 | remove_from_ctx_list(ctx); |
1546 | add_to_used_ctxlist(ctx); |
1547 | } |
1548 | if (dirty || old_mm != mm) |
1549 | sun4c_set_context(mm->context); |
1550 | } |
1551 | |
1552 | static void sun4c_destroy_context(struct mm_struct *mm) |
1553 | { |
1554 | struct ctx_list *ctx_old; |
1555 | |
1556 | if (mm->context != NO_CONTEXT) { |
1557 | sun4c_demap_context(&sun4c_context_ring[mm->context], mm->context); |
1558 | ctx_old = ctx_list_pool + mm->context; |
1559 | remove_from_ctx_list(ctx_old); |
1560 | add_to_free_ctxlist(ctx_old); |
1561 | mm->context = NO_CONTEXT; |
1562 | } |
1563 | } |
1564 | |
1565 | static void sun4c_mmu_info(struct seq_file *m) |
1566 | { |
1567 | int used_user_entries, i; |
1568 | |
1569 | used_user_entries = 0; |
1570 | for (i = 0; i < num_contexts; i++) |
1571 | used_user_entries += sun4c_context_ring[i].num_entries; |
1572 | |
1573 | seq_printf(m, |
1574 | "vacsize\t\t: %d bytes\n" |
1575 | "vachwflush\t: %s\n" |
1576 | "vaclinesize\t: %d bytes\n" |
1577 | "mmuctxs\t\t: %d\n" |
1578 | "mmupsegs\t: %d\n" |
1579 | "kernelpsegs\t: %d\n" |
1580 | "kfreepsegs\t: %d\n" |
1581 | "usedpsegs\t: %d\n" |
1582 | "ufreepsegs\t: %d\n" |
1583 | "user_taken\t: %d\n" |
1584 | "max_taken\t: %d\n", |
1585 | sun4c_vacinfo.num_bytes, |
1586 | (sun4c_vacinfo.do_hwflushes ? "yes" : "no"), |
1587 | sun4c_vacinfo.linesize, |
1588 | num_contexts, |
1589 | (invalid_segment + 1), |
1590 | sun4c_kernel_ring.num_entries, |
1591 | sun4c_kfree_ring.num_entries, |
1592 | used_user_entries, |
1593 | sun4c_ufree_ring.num_entries, |
1594 | sun4c_user_taken_entries, |
1595 | max_user_taken_entries); |
1596 | } |
1597 | |
1598 | /* Nothing below here should touch the mmu hardware nor the mmu_entry |
1599 | * data structures. |
1600 | */ |
1601 | |
1602 | /* First the functions which the mid-level code uses to directly |
1603 | * manipulate the software page tables. Some defines since we are |
1604 | * emulating the i386 page directory layout. |
1605 | */ |
1606 | #define PGD_PRESENT 0x001 |
1607 | #define PGD_RW 0x002 |
1608 | #define PGD_USER 0x004 |
1609 | #define PGD_ACCESSED 0x020 |
1610 | #define PGD_DIRTY 0x040 |
1611 | #define PGD_TABLE (PGD_PRESENT | PGD_RW | PGD_USER | PGD_ACCESSED | PGD_DIRTY) |
1612 | |
1613 | static void sun4c_set_pte(pte_t *ptep, pte_t pte) |
1614 | { |
1615 | *ptep = pte; |
1616 | } |
1617 | |
1618 | static void sun4c_pgd_set(pgd_t * pgdp, pmd_t * pmdp) |
1619 | { |
1620 | } |
1621 | |
1622 | static void sun4c_pmd_set(pmd_t * pmdp, pte_t * ptep) |
1623 | { |
1624 | pmdp->pmdv[0] = PGD_TABLE | (unsigned long) ptep; |
1625 | } |
1626 | |
1627 | static void sun4c_pmd_populate(pmd_t * pmdp, struct page * ptep) |
1628 | { |
1629 | if (page_address(ptep) == NULL) BUG(); /* No highmem on sun4c */ |
1630 | pmdp->pmdv[0] = PGD_TABLE | (unsigned long) page_address(ptep); |
1631 | } |
1632 | |
1633 | static int sun4c_pte_present(pte_t pte) |
1634 | { |
1635 | return ((pte_val(pte) & (_SUN4C_PAGE_PRESENT | _SUN4C_PAGE_PRIV)) != 0); |
1636 | } |
1637 | static void sun4c_pte_clear(pte_t *ptep) { *ptep = __pte(0); } |
1638 | |
1639 | static int sun4c_pmd_bad(pmd_t pmd) |
1640 | { |
1641 | return (((pmd_val(pmd) & ~PAGE_MASK) != PGD_TABLE) || |
1642 | (!virt_addr_valid(pmd_val(pmd)))); |
1643 | } |
1644 | |
1645 | static int sun4c_pmd_present(pmd_t pmd) |
1646 | { |
1647 | return ((pmd_val(pmd) & PGD_PRESENT) != 0); |
1648 | } |
1649 | |
1650 | #if 0 /* if PMD takes one word */ |
1651 | static void sun4c_pmd_clear(pmd_t *pmdp) { *pmdp = __pmd(0); } |
1652 | #else /* if pmd_t is a longish aggregate */ |
1653 | static void sun4c_pmd_clear(pmd_t *pmdp) { |
1654 | memset((void *)pmdp, 0, sizeof(pmd_t)); |
1655 | } |
1656 | #endif |
1657 | |
1658 | static int sun4c_pgd_none(pgd_t pgd) { return 0; } |
1659 | static int sun4c_pgd_bad(pgd_t pgd) { return 0; } |
1660 | static int sun4c_pgd_present(pgd_t pgd) { return 1; } |
1661 | static void sun4c_pgd_clear(pgd_t * pgdp) { } |
1662 | |
1663 | /* |
1664 | * The following only work if pte_present() is true. |
1665 | * Undefined behaviour if not.. |
1666 | */ |
1667 | static pte_t sun4c_pte_mkwrite(pte_t pte) |
1668 | { |
1669 | pte = __pte(pte_val(pte) | _SUN4C_PAGE_WRITE); |
1670 | if (pte_val(pte) & _SUN4C_PAGE_MODIFIED) |
1671 | pte = __pte(pte_val(pte) | _SUN4C_PAGE_SILENT_WRITE); |
1672 | return pte; |
1673 | } |
1674 | |
1675 | static pte_t sun4c_pte_mkdirty(pte_t pte) |
1676 | { |
1677 | pte = __pte(pte_val(pte) | _SUN4C_PAGE_MODIFIED); |
1678 | if (pte_val(pte) & _SUN4C_PAGE_WRITE) |
1679 | pte = __pte(pte_val(pte) | _SUN4C_PAGE_SILENT_WRITE); |
1680 | return pte; |
1681 | } |
1682 | |
1683 | static pte_t sun4c_pte_mkyoung(pte_t pte) |
1684 | { |
1685 | pte = __pte(pte_val(pte) | _SUN4C_PAGE_ACCESSED); |
1686 | if (pte_val(pte) & _SUN4C_PAGE_READ) |
1687 | pte = __pte(pte_val(pte) | _SUN4C_PAGE_SILENT_READ); |
1688 | return pte; |
1689 | } |
1690 | |
1691 | /* |
1692 | * Conversion functions: convert a page and protection to a page entry, |
1693 | * and a page entry and page directory to the page they refer to. |
1694 | */ |
1695 | static pte_t sun4c_mk_pte(struct page *page, pgprot_t pgprot) |
1696 | { |
1697 | return __pte(page_to_pfn(page) | pgprot_val(pgprot)); |
1698 | } |
1699 | |
1700 | static pte_t sun4c_mk_pte_phys(unsigned long phys_page, pgprot_t pgprot) |
1701 | { |
1702 | return __pte((phys_page >> PAGE_SHIFT) | pgprot_val(pgprot)); |
1703 | } |
1704 | |
1705 | static pte_t sun4c_mk_pte_io(unsigned long page, pgprot_t pgprot, int space) |
1706 | { |
1707 | return __pte(((page - PAGE_OFFSET) >> PAGE_SHIFT) | pgprot_val(pgprot)); |
1708 | } |
1709 | |
1710 | static unsigned long sun4c_pte_pfn(pte_t pte) |
1711 | { |
1712 | return pte_val(pte) & SUN4C_PFN_MASK; |
1713 | } |
1714 | |
1715 | static pte_t sun4c_pgoff_to_pte(unsigned long pgoff) |
1716 | { |
1717 | return __pte(pgoff | _SUN4C_PAGE_FILE); |
1718 | } |
1719 | |
1720 | static unsigned long sun4c_pte_to_pgoff(pte_t pte) |
1721 | { |
1722 | return pte_val(pte) & ((1UL << PTE_FILE_MAX_BITS) - 1); |
1723 | } |
1724 | |
1725 | |
1726 | static inline unsigned long sun4c_pmd_page_v(pmd_t pmd) |
1727 | { |
1728 | return (pmd_val(pmd) & PAGE_MASK); |
1729 | } |
1730 | |
1731 | static struct page *sun4c_pmd_page(pmd_t pmd) |
1732 | { |
1733 | return virt_to_page(sun4c_pmd_page_v(pmd)); |
1734 | } |
1735 | |
1736 | static unsigned long sun4c_pgd_page(pgd_t pgd) { return 0; } |
1737 | |
1738 | /* to find an entry in a page-table-directory */ |
1739 | static inline pgd_t *sun4c_pgd_offset(struct mm_struct * mm, unsigned long address) |
1740 | { |
1741 | return mm->pgd + (address >> SUN4C_PGDIR_SHIFT); |
1742 | } |
1743 | |
1744 | /* Find an entry in the second-level page table.. */ |
1745 | static pmd_t *sun4c_pmd_offset(pgd_t * dir, unsigned long address) |
1746 | { |
1747 | return (pmd_t *) dir; |
1748 | } |
1749 | |
1750 | /* Find an entry in the third-level page table.. */ |
1751 | pte_t *sun4c_pte_offset_kernel(pmd_t * dir, unsigned long address) |
1752 | { |
1753 | return (pte_t *) sun4c_pmd_page_v(*dir) + |
1754 | ((address >> PAGE_SHIFT) & (SUN4C_PTRS_PER_PTE - 1)); |
1755 | } |
1756 | |
1757 | static unsigned long sun4c_swp_type(swp_entry_t entry) |
1758 | { |
1759 | return (entry.val & SUN4C_SWP_TYPE_MASK); |
1760 | } |
1761 | |
1762 | static unsigned long sun4c_swp_offset(swp_entry_t entry) |
1763 | { |
1764 | return (entry.val >> SUN4C_SWP_OFF_SHIFT) & SUN4C_SWP_OFF_MASK; |
1765 | } |
1766 | |
1767 | static swp_entry_t sun4c_swp_entry(unsigned long type, unsigned long offset) |
1768 | { |
1769 | return (swp_entry_t) { |
1770 | (offset & SUN4C_SWP_OFF_MASK) << SUN4C_SWP_OFF_SHIFT |
1771 | | (type & SUN4C_SWP_TYPE_MASK) }; |
1772 | } |
1773 | |
1774 | static void sun4c_free_pte_slow(pte_t *pte) |
1775 | { |
1776 | free_page((unsigned long)pte); |
1777 | } |
1778 | |
1779 | static void sun4c_free_pgd_slow(pgd_t *pgd) |
1780 | { |
1781 | free_page((unsigned long)pgd); |
1782 | } |
1783 | |
1784 | static pgd_t *sun4c_get_pgd_fast(void) |
1785 | { |
1786 | unsigned long *ret; |
1787 | |
1788 | if ((ret = pgd_quicklist) != NULL) { |
1789 | pgd_quicklist = (unsigned long *)(*ret); |
1790 | ret[0] = ret[1]; |
1791 | pgtable_cache_size--; |
1792 | } else { |
1793 | pgd_t *init; |
1794 | |
1795 | ret = (unsigned long *)__get_free_page(GFP_KERNEL); |
1796 | memset (ret, 0, (KERNBASE / SUN4C_PGDIR_SIZE) * sizeof(pgd_t)); |
1797 | init = sun4c_pgd_offset(&init_mm, 0); |
1798 | memcpy (((pgd_t *)ret) + USER_PTRS_PER_PGD, init + USER_PTRS_PER_PGD, |
1799 | (PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t)); |
1800 | } |
1801 | return (pgd_t *)ret; |
1802 | } |
1803 | |
1804 | static void sun4c_free_pgd_fast(pgd_t *pgd) |
1805 | { |
1806 | *(unsigned long *)pgd = (unsigned long) pgd_quicklist; |
1807 | pgd_quicklist = (unsigned long *) pgd; |
1808 | pgtable_cache_size++; |
1809 | } |
1810 | |
1811 | |
1812 | static inline pte_t * |
1813 | sun4c_pte_alloc_one_fast(struct mm_struct *mm, unsigned long address) |
1814 | { |
1815 | unsigned long *ret; |
1816 | |
1817 | if ((ret = (unsigned long *)pte_quicklist) != NULL) { |
1818 | pte_quicklist = (unsigned long *)(*ret); |
1819 | ret[0] = ret[1]; |
1820 | pgtable_cache_size--; |
1821 | } |
1822 | return (pte_t *)ret; |
1823 | } |
1824 | |
1825 | static pte_t *sun4c_pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address) |
1826 | { |
1827 | pte_t *pte; |
1828 | |
1829 | if ((pte = sun4c_pte_alloc_one_fast(mm, address)) != NULL) |
1830 | return pte; |
1831 | |
1832 | pte = (pte_t *)get_zeroed_page(GFP_KERNEL|__GFP_REPEAT); |
1833 | return pte; |
1834 | } |
1835 | |
1836 | static pgtable_t sun4c_pte_alloc_one(struct mm_struct *mm, unsigned long address) |
1837 | { |
1838 | pte_t *pte; |
1839 | struct page *page; |
1840 | |
1841 | pte = sun4c_pte_alloc_one_kernel(mm, address); |
1842 | if (pte == NULL) |
1843 | return NULL; |
1844 | page = virt_to_page(pte); |
1845 | pgtable_page_ctor(page); |
1846 | return page; |
1847 | } |
1848 | |
1849 | static inline void sun4c_free_pte_fast(pte_t *pte) |
1850 | { |
1851 | *(unsigned long *)pte = (unsigned long) pte_quicklist; |
1852 | pte_quicklist = (unsigned long *) pte; |
1853 | pgtable_cache_size++; |
1854 | } |
1855 | |
1856 | static void sun4c_pte_free(pgtable_t pte) |
1857 | { |
1858 | pgtable_page_dtor(pte); |
1859 | sun4c_free_pte_fast(page_address(pte)); |
1860 | } |
1861 | |
1862 | /* |
1863 | * allocating and freeing a pmd is trivial: the 1-entry pmd is |
1864 | * inside the pgd, so has no extra memory associated with it. |
1865 | */ |
1866 | static pmd_t *sun4c_pmd_alloc_one(struct mm_struct *mm, unsigned long address) |
1867 | { |
1868 | BUG(); |
1869 | return NULL; |
1870 | } |
1871 | |
1872 | static void sun4c_free_pmd_fast(pmd_t * pmd) { } |
1873 | |
1874 | static void sun4c_check_pgt_cache(int low, int high) |
1875 | { |
1876 | if (pgtable_cache_size > high) { |
1877 | do { |
1878 | if (pgd_quicklist) |
1879 | sun4c_free_pgd_slow(sun4c_get_pgd_fast()); |
1880 | if (pte_quicklist) |
1881 | sun4c_free_pte_slow(sun4c_pte_alloc_one_fast(NULL, 0)); |
1882 | } while (pgtable_cache_size > low); |
1883 | } |
1884 | } |
1885 | |
1886 | /* An experiment, turn off by default for now... -DaveM */ |
1887 | #define SUN4C_PRELOAD_PSEG |
1888 | |
1889 | void sun4c_update_mmu_cache(struct vm_area_struct *vma, unsigned long address, pte_t *ptep) |
1890 | { |
1891 | unsigned long flags; |
1892 | int pseg; |
1893 | |
1894 | if (vma->vm_mm->context == NO_CONTEXT) |
1895 | return; |
1896 | |
1897 | local_irq_save(flags); |
1898 | address &= PAGE_MASK; |
1899 | if ((pseg = sun4c_get_segmap(address)) == invalid_segment) { |
1900 | struct sun4c_mmu_entry *entry = sun4c_user_strategy(); |
1901 | struct mm_struct *mm = vma->vm_mm; |
1902 | unsigned long start, end; |
1903 | |
1904 | entry->vaddr = start = (address & SUN4C_REAL_PGDIR_MASK); |
1905 | entry->ctx = mm->context; |
1906 | add_ring_ordered(sun4c_context_ring + mm->context, entry); |
1907 | sun4c_put_segmap(entry->vaddr, entry->pseg); |
1908 | end = start + SUN4C_REAL_PGDIR_SIZE; |
1909 | while (start < end) { |
1910 | #ifdef SUN4C_PRELOAD_PSEG |
1911 | pgd_t *pgdp = sun4c_pgd_offset(mm, start); |
1912 | pte_t *ptep; |
1913 | |
1914 | if (!pgdp) |
1915 | goto no_mapping; |
1916 | ptep = sun4c_pte_offset_kernel((pmd_t *) pgdp, start); |
1917 | if (!ptep || !(pte_val(*ptep) & _SUN4C_PAGE_PRESENT)) |
1918 | goto no_mapping; |
1919 | sun4c_put_pte(start, pte_val(*ptep)); |
1920 | goto next; |
1921 | |
1922 | no_mapping: |
1923 | #endif |
1924 | sun4c_put_pte(start, 0); |
1925 | #ifdef SUN4C_PRELOAD_PSEG |
1926 | next: |
1927 | #endif |
1928 | start += PAGE_SIZE; |
1929 | } |
1930 | #ifndef SUN4C_PRELOAD_PSEG |
1931 | sun4c_put_pte(address, pte_val(*ptep)); |
1932 | #endif |
1933 | local_irq_restore(flags); |
1934 | return; |
1935 | } else { |
1936 | struct sun4c_mmu_entry *entry = &mmu_entry_pool[pseg]; |
1937 | |
1938 | remove_lru(entry); |
1939 | add_lru(entry); |
1940 | } |
1941 | |
1942 | sun4c_put_pte(address, pte_val(*ptep)); |
1943 | local_irq_restore(flags); |
1944 | } |
1945 | |
1946 | extern void sparc_context_init(int); |
1947 | extern unsigned long bootmem_init(unsigned long *pages_avail); |
1948 | extern unsigned long last_valid_pfn; |
1949 | |
1950 | void __init sun4c_paging_init(void) |
1951 | { |
1952 | int i, cnt; |
1953 | unsigned long kernel_end, vaddr; |
1954 | extern struct resource sparc_iomap; |
1955 | unsigned long end_pfn, pages_avail; |
1956 | |
1957 | kernel_end = (unsigned long) &_end; |
1958 | kernel_end = SUN4C_REAL_PGDIR_ALIGN(kernel_end); |
1959 | |
1960 | pages_avail = 0; |
1961 | last_valid_pfn = bootmem_init(&pages_avail); |
1962 | end_pfn = last_valid_pfn; |
1963 | |
1964 | sun4c_probe_mmu(); |
1965 | invalid_segment = (num_segmaps - 1); |
1966 | sun4c_init_mmu_entry_pool(); |
1967 | sun4c_init_rings(); |
1968 | sun4c_init_map_kernelprom(kernel_end); |
1969 | sun4c_init_clean_mmu(kernel_end); |
1970 | sun4c_init_fill_kernel_ring(SUN4C_KERNEL_BUCKETS); |
1971 | sun4c_init_lock_area(sparc_iomap.start, IOBASE_END); |
1972 | sun4c_init_lock_area(DVMA_VADDR, DVMA_END); |
1973 | sun4c_init_lock_areas(); |
1974 | sun4c_init_fill_user_ring(); |
1975 | |
1976 | sun4c_set_context(0); |
1977 | memset(swapper_pg_dir, 0, PAGE_SIZE); |
1978 | memset(pg0, 0, PAGE_SIZE); |
1979 | memset(pg1, 0, PAGE_SIZE); |
1980 | memset(pg2, 0, PAGE_SIZE); |
1981 | memset(pg3, 0, PAGE_SIZE); |
1982 | |
1983 | /* Save work later. */ |
1984 | vaddr = VMALLOC_START; |
1985 | swapper_pg_dir[vaddr>>SUN4C_PGDIR_SHIFT] = __pgd(PGD_TABLE | (unsigned long) pg0); |
1986 | vaddr += SUN4C_PGDIR_SIZE; |
1987 | swapper_pg_dir[vaddr>>SUN4C_PGDIR_SHIFT] = __pgd(PGD_TABLE | (unsigned long) pg1); |
1988 | vaddr += SUN4C_PGDIR_SIZE; |
1989 | swapper_pg_dir[vaddr>>SUN4C_PGDIR_SHIFT] = __pgd(PGD_TABLE | (unsigned long) pg2); |
1990 | vaddr += SUN4C_PGDIR_SIZE; |
1991 | swapper_pg_dir[vaddr>>SUN4C_PGDIR_SHIFT] = __pgd(PGD_TABLE | (unsigned long) pg3); |
1992 | sun4c_init_ss2_cache_bug(); |
1993 | sparc_context_init(num_contexts); |
1994 | |
1995 | { |
1996 | unsigned long zones_size[MAX_NR_ZONES]; |
1997 | unsigned long zholes_size[MAX_NR_ZONES]; |
1998 | unsigned long npages; |
1999 | int znum; |
2000 | |
2001 | for (znum = 0; znum < MAX_NR_ZONES; znum++) |
2002 | zones_size[znum] = zholes_size[znum] = 0; |
2003 | |
2004 | npages = max_low_pfn - pfn_base; |
2005 | |
2006 | zones_size[ZONE_DMA] = npages; |
2007 | zholes_size[ZONE_DMA] = npages - pages_avail; |
2008 | |
2009 | npages = highend_pfn - max_low_pfn; |
2010 | zones_size[ZONE_HIGHMEM] = npages; |
2011 | zholes_size[ZONE_HIGHMEM] = npages - calc_highpages(); |
2012 | |
2013 | free_area_init_node(0, zones_size, pfn_base, zholes_size); |
2014 | } |
2015 | |
2016 | cnt = 0; |
2017 | for (i = 0; i < num_segmaps; i++) |
2018 | if (mmu_entry_pool[i].locked) |
2019 | cnt++; |
2020 | |
2021 | max_user_taken_entries = num_segmaps - cnt - 40 - 1; |
2022 | |
2023 | printk("SUN4C: %d mmu entries for the kernel\n", cnt); |
2024 | } |
2025 | |
2026 | static pgprot_t sun4c_pgprot_noncached(pgprot_t prot) |
2027 | { |
2028 | prot |= __pgprot(_SUN4C_PAGE_IO | _SUN4C_PAGE_NOCACHE); |
2029 | |
2030 | return prot; |
2031 | } |
2032 | |
2033 | /* Load up routines and constants for sun4c mmu */ |
2034 | void __init ld_mmu_sun4c(void) |
2035 | { |
2036 | extern void ___xchg32_sun4c(void); |
2037 | |
2038 | printk("Loading sun4c MMU routines\n"); |
2039 | |
2040 | /* First the constants */ |
2041 | BTFIXUPSET_SIMM13(pgdir_shift, SUN4C_PGDIR_SHIFT); |
2042 | BTFIXUPSET_SETHI(pgdir_size, SUN4C_PGDIR_SIZE); |
2043 | BTFIXUPSET_SETHI(pgdir_mask, SUN4C_PGDIR_MASK); |
2044 | |
2045 | BTFIXUPSET_SIMM13(ptrs_per_pmd, SUN4C_PTRS_PER_PMD); |
2046 | BTFIXUPSET_SIMM13(ptrs_per_pgd, SUN4C_PTRS_PER_PGD); |
2047 | BTFIXUPSET_SIMM13(user_ptrs_per_pgd, KERNBASE / SUN4C_PGDIR_SIZE); |
2048 | |
2049 | BTFIXUPSET_INT(page_none, pgprot_val(SUN4C_PAGE_NONE)); |
2050 | PAGE_SHARED = pgprot_val(SUN4C_PAGE_SHARED); |
2051 | BTFIXUPSET_INT(page_copy, pgprot_val(SUN4C_PAGE_COPY)); |
2052 | BTFIXUPSET_INT(page_readonly, pgprot_val(SUN4C_PAGE_READONLY)); |
2053 | BTFIXUPSET_INT(page_kernel, pgprot_val(SUN4C_PAGE_KERNEL)); |
2054 | page_kernel = pgprot_val(SUN4C_PAGE_KERNEL); |
2055 | |
2056 | /* Functions */ |
2057 | BTFIXUPSET_CALL(pgprot_noncached, sun4c_pgprot_noncached, BTFIXUPCALL_NORM); |
2058 | BTFIXUPSET_CALL(___xchg32, ___xchg32_sun4c, BTFIXUPCALL_NORM); |
2059 | BTFIXUPSET_CALL(do_check_pgt_cache, sun4c_check_pgt_cache, BTFIXUPCALL_NORM); |
2060 | |
2061 | BTFIXUPSET_CALL(flush_cache_all, sun4c_flush_cache_all, BTFIXUPCALL_NORM); |
2062 | |
2063 | if (sun4c_vacinfo.do_hwflushes) { |
2064 | BTFIXUPSET_CALL(sun4c_flush_page, sun4c_flush_page_hw, BTFIXUPCALL_NORM); |
2065 | BTFIXUPSET_CALL(sun4c_flush_segment, sun4c_flush_segment_hw, BTFIXUPCALL_NORM); |
2066 | BTFIXUPSET_CALL(sun4c_flush_context, sun4c_flush_context_hw, BTFIXUPCALL_NORM); |
2067 | } else { |
2068 | BTFIXUPSET_CALL(sun4c_flush_page, sun4c_flush_page_sw, BTFIXUPCALL_NORM); |
2069 | BTFIXUPSET_CALL(sun4c_flush_segment, sun4c_flush_segment_sw, BTFIXUPCALL_NORM); |
2070 | BTFIXUPSET_CALL(sun4c_flush_context, sun4c_flush_context_sw, BTFIXUPCALL_NORM); |
2071 | } |
2072 | |
2073 | BTFIXUPSET_CALL(flush_tlb_mm, sun4c_flush_tlb_mm, BTFIXUPCALL_NORM); |
2074 | BTFIXUPSET_CALL(flush_cache_mm, sun4c_flush_cache_mm, BTFIXUPCALL_NORM); |
2075 | BTFIXUPSET_CALL(destroy_context, sun4c_destroy_context, BTFIXUPCALL_NORM); |
2076 | BTFIXUPSET_CALL(switch_mm, sun4c_switch_mm, BTFIXUPCALL_NORM); |
2077 | BTFIXUPSET_CALL(flush_cache_page, sun4c_flush_cache_page, BTFIXUPCALL_NORM); |
2078 | BTFIXUPSET_CALL(flush_tlb_page, sun4c_flush_tlb_page, BTFIXUPCALL_NORM); |
2079 | BTFIXUPSET_CALL(flush_tlb_range, sun4c_flush_tlb_range, BTFIXUPCALL_NORM); |
2080 | BTFIXUPSET_CALL(flush_cache_range, sun4c_flush_cache_range, BTFIXUPCALL_NORM); |
2081 | BTFIXUPSET_CALL(__flush_page_to_ram, sun4c_flush_page_to_ram, BTFIXUPCALL_NORM); |
2082 | BTFIXUPSET_CALL(flush_tlb_all, sun4c_flush_tlb_all, BTFIXUPCALL_NORM); |
2083 | |
2084 | BTFIXUPSET_CALL(flush_sig_insns, sun4c_flush_sig_insns, BTFIXUPCALL_NOP); |
2085 | |
2086 | BTFIXUPSET_CALL(set_pte, sun4c_set_pte, BTFIXUPCALL_STO1O0); |
2087 | |
2088 | BTFIXUPSET_CALL(pte_pfn, sun4c_pte_pfn, BTFIXUPCALL_NORM); |
2089 | #if 0 /* PAGE_SHIFT <= 12 */ /* Eek. Investigate. XXX */ |
2090 | BTFIXUPSET_CALL(pmd_page, sun4c_pmd_page, BTFIXUPCALL_ANDNINT(PAGE_SIZE - 1)); |
2091 | #else |
2092 | BTFIXUPSET_CALL(pmd_page, sun4c_pmd_page, BTFIXUPCALL_NORM); |
2093 | #endif |
2094 | BTFIXUPSET_CALL(pmd_set, sun4c_pmd_set, BTFIXUPCALL_NORM); |
2095 | BTFIXUPSET_CALL(pmd_populate, sun4c_pmd_populate, BTFIXUPCALL_NORM); |
2096 | |
2097 | BTFIXUPSET_CALL(pte_present, sun4c_pte_present, BTFIXUPCALL_NORM); |
2098 | BTFIXUPSET_CALL(pte_clear, sun4c_pte_clear, BTFIXUPCALL_STG0O0); |
2099 | |
2100 | BTFIXUPSET_CALL(pmd_bad, sun4c_pmd_bad, BTFIXUPCALL_NORM); |
2101 | BTFIXUPSET_CALL(pmd_present, sun4c_pmd_present, BTFIXUPCALL_NORM); |
2102 | BTFIXUPSET_CALL(pmd_clear, sun4c_pmd_clear, BTFIXUPCALL_STG0O0); |
2103 | |
2104 | BTFIXUPSET_CALL(pgd_none, sun4c_pgd_none, BTFIXUPCALL_RETINT(0)); |
2105 | BTFIXUPSET_CALL(pgd_bad, sun4c_pgd_bad, BTFIXUPCALL_RETINT(0)); |
2106 | BTFIXUPSET_CALL(pgd_present, sun4c_pgd_present, BTFIXUPCALL_RETINT(1)); |
2107 | BTFIXUPSET_CALL(pgd_clear, sun4c_pgd_clear, BTFIXUPCALL_NOP); |
2108 | |
2109 | BTFIXUPSET_CALL(mk_pte, sun4c_mk_pte, BTFIXUPCALL_NORM); |
2110 | BTFIXUPSET_CALL(mk_pte_phys, sun4c_mk_pte_phys, BTFIXUPCALL_NORM); |
2111 | BTFIXUPSET_CALL(mk_pte_io, sun4c_mk_pte_io, BTFIXUPCALL_NORM); |
2112 | |
2113 | BTFIXUPSET_INT(pte_modify_mask, _SUN4C_PAGE_CHG_MASK); |
2114 | BTFIXUPSET_CALL(pmd_offset, sun4c_pmd_offset, BTFIXUPCALL_NORM); |
2115 | BTFIXUPSET_CALL(pte_offset_kernel, sun4c_pte_offset_kernel, BTFIXUPCALL_NORM); |
2116 | BTFIXUPSET_CALL(free_pte_fast, sun4c_free_pte_fast, BTFIXUPCALL_NORM); |
2117 | BTFIXUPSET_CALL(pte_free, sun4c_pte_free, BTFIXUPCALL_NORM); |
2118 | BTFIXUPSET_CALL(pte_alloc_one_kernel, sun4c_pte_alloc_one_kernel, BTFIXUPCALL_NORM); |
2119 | BTFIXUPSET_CALL(pte_alloc_one, sun4c_pte_alloc_one, BTFIXUPCALL_NORM); |
2120 | BTFIXUPSET_CALL(free_pmd_fast, sun4c_free_pmd_fast, BTFIXUPCALL_NOP); |
2121 | BTFIXUPSET_CALL(pmd_alloc_one, sun4c_pmd_alloc_one, BTFIXUPCALL_RETO0); |
2122 | BTFIXUPSET_CALL(free_pgd_fast, sun4c_free_pgd_fast, BTFIXUPCALL_NORM); |
2123 | BTFIXUPSET_CALL(get_pgd_fast, sun4c_get_pgd_fast, BTFIXUPCALL_NORM); |
2124 | |
2125 | BTFIXUPSET_HALF(pte_writei, _SUN4C_PAGE_WRITE); |
2126 | BTFIXUPSET_HALF(pte_dirtyi, _SUN4C_PAGE_MODIFIED); |
2127 | BTFIXUPSET_HALF(pte_youngi, _SUN4C_PAGE_ACCESSED); |
2128 | BTFIXUPSET_HALF(pte_filei, _SUN4C_PAGE_FILE); |
2129 | BTFIXUPSET_HALF(pte_wrprotecti, _SUN4C_PAGE_WRITE|_SUN4C_PAGE_SILENT_WRITE); |
2130 | BTFIXUPSET_HALF(pte_mkcleani, _SUN4C_PAGE_MODIFIED|_SUN4C_PAGE_SILENT_WRITE); |
2131 | BTFIXUPSET_HALF(pte_mkoldi, _SUN4C_PAGE_ACCESSED|_SUN4C_PAGE_SILENT_READ); |
2132 | BTFIXUPSET_CALL(pte_mkwrite, sun4c_pte_mkwrite, BTFIXUPCALL_NORM); |
2133 | BTFIXUPSET_CALL(pte_mkdirty, sun4c_pte_mkdirty, BTFIXUPCALL_NORM); |
2134 | BTFIXUPSET_CALL(pte_mkyoung, sun4c_pte_mkyoung, BTFIXUPCALL_NORM); |
2135 | BTFIXUPSET_CALL(update_mmu_cache, sun4c_update_mmu_cache, BTFIXUPCALL_NORM); |
2136 | |
2137 | BTFIXUPSET_CALL(pte_to_pgoff, sun4c_pte_to_pgoff, BTFIXUPCALL_NORM); |
2138 | BTFIXUPSET_CALL(pgoff_to_pte, sun4c_pgoff_to_pte, BTFIXUPCALL_NORM); |
2139 | |
2140 | BTFIXUPSET_CALL(mmu_lockarea, sun4c_lockarea, BTFIXUPCALL_NORM); |
2141 | BTFIXUPSET_CALL(mmu_unlockarea, sun4c_unlockarea, BTFIXUPCALL_NORM); |
2142 | |
2143 | BTFIXUPSET_CALL(mmu_get_scsi_one, sun4c_get_scsi_one, BTFIXUPCALL_NORM); |
2144 | BTFIXUPSET_CALL(mmu_get_scsi_sgl, sun4c_get_scsi_sgl, BTFIXUPCALL_NORM); |
2145 | BTFIXUPSET_CALL(mmu_release_scsi_one, sun4c_release_scsi_one, BTFIXUPCALL_NORM); |
2146 | BTFIXUPSET_CALL(mmu_release_scsi_sgl, sun4c_release_scsi_sgl, BTFIXUPCALL_NORM); |
2147 | |
2148 | BTFIXUPSET_CALL(mmu_map_dma_area, sun4c_map_dma_area, BTFIXUPCALL_NORM); |
2149 | BTFIXUPSET_CALL(mmu_unmap_dma_area, sun4c_unmap_dma_area, BTFIXUPCALL_NORM); |
2150 | |
2151 | BTFIXUPSET_CALL(sparc_mapiorange, sun4c_mapiorange, BTFIXUPCALL_NORM); |
2152 | BTFIXUPSET_CALL(sparc_unmapiorange, sun4c_unmapiorange, BTFIXUPCALL_NORM); |
2153 | |
2154 | BTFIXUPSET_CALL(__swp_type, sun4c_swp_type, BTFIXUPCALL_NORM); |
2155 | BTFIXUPSET_CALL(__swp_offset, sun4c_swp_offset, BTFIXUPCALL_NORM); |
2156 | BTFIXUPSET_CALL(__swp_entry, sun4c_swp_entry, BTFIXUPCALL_NORM); |
2157 | |
2158 | BTFIXUPSET_CALL(alloc_thread_info_node, sun4c_alloc_thread_info_node, BTFIXUPCALL_NORM); |
2159 | BTFIXUPSET_CALL(free_thread_info, sun4c_free_thread_info, BTFIXUPCALL_NORM); |
2160 | |
2161 | BTFIXUPSET_CALL(mmu_info, sun4c_mmu_info, BTFIXUPCALL_NORM); |
2162 | |
2163 | /* These should _never_ get called with two level tables. */ |
2164 | BTFIXUPSET_CALL(pgd_set, sun4c_pgd_set, BTFIXUPCALL_NOP); |
2165 | BTFIXUPSET_CALL(pgd_page_vaddr, sun4c_pgd_page, BTFIXUPCALL_RETO0); |
2166 | } |
2167 |
Branches:
ben-wpan
ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
jz-2.6.34-rc5
jz-2.6.34-rc6
jz-2.6.34-rc7
jz-2.6.35
jz-2.6.36
jz-2.6.37
jz-2.6.38
jz-2.6.39
jz-3.0
jz-3.1
jz-3.11
jz-3.12
jz-3.13
jz-3.15
jz-3.16
jz-3.18-dt
jz-3.2
jz-3.3
jz-3.4
jz-3.5
jz-3.6
jz-3.6-rc2-pwm
jz-3.9
jz-3.9-clk
jz-3.9-rc8
jz47xx
jz47xx-2.6.38
master
Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9