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Source at commit 0de2b2b3be81048189a32f7a3d3ba0ba9ec817b6 created 11 years 11 months ago. By Maarten ter Huurne, MIPS: JZ4740: Fixed value for round robin constant. | |
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1 | /* |
2 | * head.S: The initial boot code for the Sparc port of Linux. |
3 | * |
4 | * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu) |
5 | * Copyright (C) 1995,1999 Pete Zaitcev (zaitcev@yahoo.com) |
6 | * Copyright (C) 1996 Miguel de Icaza (miguel@nuclecu.unam.mx) |
7 | * Copyright (C) 1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz) |
8 | * Copyright (C) 1997 Michael A. Griffith (grif@acm.org) |
9 | * |
10 | * CompactPCI platform by Eric Brower, 1999. |
11 | */ |
12 | |
13 | #include <linux/version.h> |
14 | #include <linux/init.h> |
15 | |
16 | #include <asm/head.h> |
17 | #include <asm/asi.h> |
18 | #include <asm/contregs.h> |
19 | #include <asm/ptrace.h> |
20 | #include <asm/psr.h> |
21 | #include <asm/page.h> |
22 | #include <asm/kdebug.h> |
23 | #include <asm/winmacro.h> |
24 | #include <asm/thread_info.h> /* TI_UWINMASK */ |
25 | #include <asm/errno.h> |
26 | #include <asm/pgtsrmmu.h> /* SRMMU_PGDIR_SHIFT */ |
27 | |
28 | .data |
29 | /* |
30 | * The following are used with the prom_vector node-ops to figure out |
31 | * the cpu-type |
32 | */ |
33 | |
34 | .align 4 |
35 | cputyp: |
36 | .word 1 |
37 | |
38 | .align 4 |
39 | .globl cputypval |
40 | cputypval: |
41 | .asciz "sun4c" |
42 | .ascii " " |
43 | |
44 | cputypvalend: |
45 | cputypvallen = cputypvar - cputypval |
46 | |
47 | .align 4 |
48 | /* |
49 | * Sun people can't spell worth damn. "compatability" indeed. |
50 | * At least we *know* we can't spell, and use a spell-checker. |
51 | */ |
52 | |
53 | /* Uh, actually Linus it is I who cannot spell. Too much murky |
54 | * Sparc assembly will do this to ya. |
55 | */ |
56 | cputypvar: |
57 | .asciz "compatability" |
58 | |
59 | /* Tested on SS-5, SS-10. Probably someone at Sun applied a spell-checker. */ |
60 | .align 4 |
61 | cputypvar_sun4m: |
62 | .asciz "compatible" |
63 | |
64 | .align 4 |
65 | |
66 | sun4_notsup: |
67 | .asciz "Sparc-Linux sun4 support does no longer exist.\n\n" |
68 | .align 4 |
69 | |
70 | sun4e_notsup: |
71 | .asciz "Sparc-Linux sun4e support does not exist\n\n" |
72 | .align 4 |
73 | |
74 | /* The Sparc trap table, bootloader gives us control at _start. */ |
75 | __HEAD |
76 | .globl _stext, _start, __stext |
77 | .globl trapbase |
78 | _start: /* danger danger */ |
79 | __stext: |
80 | _stext: |
81 | trapbase: |
82 | #ifdef CONFIG_SMP |
83 | trapbase_cpu0: |
84 | #endif |
85 | /* We get control passed to us here at t_zero. */ |
86 | t_zero: b gokernel; nop; nop; nop; |
87 | t_tflt: SPARC_TFAULT /* Inst. Access Exception */ |
88 | t_bins: TRAP_ENTRY(0x2, bad_instruction) /* Illegal Instruction */ |
89 | t_pins: TRAP_ENTRY(0x3, priv_instruction) /* Privileged Instruction */ |
90 | t_fpd: TRAP_ENTRY(0x4, fpd_trap_handler) /* Floating Point Disabled */ |
91 | t_wovf: WINDOW_SPILL /* Window Overflow */ |
92 | t_wunf: WINDOW_FILL /* Window Underflow */ |
93 | t_mna: TRAP_ENTRY(0x7, mna_handler) /* Memory Address Not Aligned */ |
94 | t_fpe: TRAP_ENTRY(0x8, fpe_trap_handler) /* Floating Point Exception */ |
95 | t_dflt: SPARC_DFAULT /* Data Miss Exception */ |
96 | t_tio: TRAP_ENTRY(0xa, do_tag_overflow) /* Tagged Instruction Ovrflw */ |
97 | t_wpt: TRAP_ENTRY(0xb, do_watchpoint) /* Watchpoint Detected */ |
98 | t_badc: BAD_TRAP(0xc) BAD_TRAP(0xd) BAD_TRAP(0xe) BAD_TRAP(0xf) BAD_TRAP(0x10) |
99 | t_irq1: TRAP_ENTRY_INTERRUPT(1) /* IRQ Software/SBUS Level 1 */ |
100 | t_irq2: TRAP_ENTRY_INTERRUPT(2) /* IRQ SBUS Level 2 */ |
101 | t_irq3: TRAP_ENTRY_INTERRUPT(3) /* IRQ SCSI/DMA/SBUS Level 3 */ |
102 | t_irq4: TRAP_ENTRY_INTERRUPT(4) /* IRQ Software Level 4 */ |
103 | t_irq5: TRAP_ENTRY_INTERRUPT(5) /* IRQ SBUS/Ethernet Level 5 */ |
104 | t_irq6: TRAP_ENTRY_INTERRUPT(6) /* IRQ Software Level 6 */ |
105 | t_irq7: TRAP_ENTRY_INTERRUPT(7) /* IRQ Video/SBUS Level 5 */ |
106 | t_irq8: TRAP_ENTRY_INTERRUPT(8) /* IRQ SBUS Level 6 */ |
107 | t_irq9: TRAP_ENTRY_INTERRUPT(9) /* IRQ SBUS Level 7 */ |
108 | t_irq10:TRAP_ENTRY_INTERRUPT(10) /* IRQ Timer #1 (one we use) */ |
109 | t_irq11:TRAP_ENTRY_INTERRUPT(11) /* IRQ Floppy Intr. */ |
110 | t_irq12:TRAP_ENTRY_INTERRUPT(12) /* IRQ Zilog serial chip */ |
111 | t_irq13:TRAP_ENTRY_INTERRUPT(13) /* IRQ Audio Intr. */ |
112 | t_irq14:TRAP_ENTRY_INTERRUPT(14) /* IRQ Timer #2 */ |
113 | .globl t_nmi |
114 | #ifndef CONFIG_SMP |
115 | t_nmi: NMI_TRAP /* Level 15 (NMI) */ |
116 | #else |
117 | t_nmi: TRAP_ENTRY(0x1f, linux_trap_ipi15_sun4m) |
118 | #endif |
119 | t_racc: TRAP_ENTRY(0x20, do_reg_access) /* General Register Access Error */ |
120 | t_iacce:BAD_TRAP(0x21) /* Instr Access Error */ |
121 | t_bad22:BAD_TRAP(0x22) BAD_TRAP(0x23) |
122 | t_cpdis:TRAP_ENTRY(0x24, do_cp_disabled) /* Co-Processor Disabled */ |
123 | t_uflsh:SKIP_TRAP(0x25, unimp_flush) /* Unimplemented FLUSH inst. */ |
124 | t_bad26:BAD_TRAP(0x26) BAD_TRAP(0x27) |
125 | t_cpexc:TRAP_ENTRY(0x28, do_cp_exception) /* Co-Processor Exception */ |
126 | t_dacce:SPARC_DFAULT /* Data Access Error */ |
127 | t_hwdz: TRAP_ENTRY(0x2a, do_hw_divzero) /* Division by zero, you lose... */ |
128 | t_dserr:BAD_TRAP(0x2b) /* Data Store Error */ |
129 | t_daccm:BAD_TRAP(0x2c) /* Data Access MMU-Miss */ |
130 | t_bad2d:BAD_TRAP(0x2d) BAD_TRAP(0x2e) BAD_TRAP(0x2f) BAD_TRAP(0x30) BAD_TRAP(0x31) |
131 | t_bad32:BAD_TRAP(0x32) BAD_TRAP(0x33) BAD_TRAP(0x34) BAD_TRAP(0x35) BAD_TRAP(0x36) |
132 | t_bad37:BAD_TRAP(0x37) BAD_TRAP(0x38) BAD_TRAP(0x39) BAD_TRAP(0x3a) BAD_TRAP(0x3b) |
133 | t_iaccm:BAD_TRAP(0x3c) /* Instr Access MMU-Miss */ |
134 | t_bad3d:BAD_TRAP(0x3d) BAD_TRAP(0x3e) BAD_TRAP(0x3f) BAD_TRAP(0x40) BAD_TRAP(0x41) |
135 | t_bad42:BAD_TRAP(0x42) BAD_TRAP(0x43) BAD_TRAP(0x44) BAD_TRAP(0x45) BAD_TRAP(0x46) |
136 | t_bad47:BAD_TRAP(0x47) BAD_TRAP(0x48) BAD_TRAP(0x49) BAD_TRAP(0x4a) BAD_TRAP(0x4b) |
137 | t_bad4c:BAD_TRAP(0x4c) BAD_TRAP(0x4d) BAD_TRAP(0x4e) BAD_TRAP(0x4f) BAD_TRAP(0x50) |
138 | t_bad51:BAD_TRAP(0x51) BAD_TRAP(0x52) BAD_TRAP(0x53) BAD_TRAP(0x54) BAD_TRAP(0x55) |
139 | t_bad56:BAD_TRAP(0x56) BAD_TRAP(0x57) BAD_TRAP(0x58) BAD_TRAP(0x59) BAD_TRAP(0x5a) |
140 | t_bad5b:BAD_TRAP(0x5b) BAD_TRAP(0x5c) BAD_TRAP(0x5d) BAD_TRAP(0x5e) BAD_TRAP(0x5f) |
141 | t_bad60:BAD_TRAP(0x60) BAD_TRAP(0x61) BAD_TRAP(0x62) BAD_TRAP(0x63) BAD_TRAP(0x64) |
142 | t_bad65:BAD_TRAP(0x65) BAD_TRAP(0x66) BAD_TRAP(0x67) BAD_TRAP(0x68) BAD_TRAP(0x69) |
143 | t_bad6a:BAD_TRAP(0x6a) BAD_TRAP(0x6b) BAD_TRAP(0x6c) BAD_TRAP(0x6d) BAD_TRAP(0x6e) |
144 | t_bad6f:BAD_TRAP(0x6f) BAD_TRAP(0x70) BAD_TRAP(0x71) BAD_TRAP(0x72) BAD_TRAP(0x73) |
145 | t_bad74:BAD_TRAP(0x74) BAD_TRAP(0x75) BAD_TRAP(0x76) BAD_TRAP(0x77) BAD_TRAP(0x78) |
146 | t_bad79:BAD_TRAP(0x79) BAD_TRAP(0x7a) BAD_TRAP(0x7b) BAD_TRAP(0x7c) BAD_TRAP(0x7d) |
147 | t_bad7e:BAD_TRAP(0x7e) BAD_TRAP(0x7f) |
148 | t_bad80:BAD_TRAP(0x80) /* SunOS System Call */ |
149 | t_sbkpt:BREAKPOINT_TRAP /* Software Breakpoint/KGDB */ |
150 | t_divz: TRAP_ENTRY(0x82, do_hw_divzero) /* Divide by zero trap */ |
151 | t_flwin:TRAP_ENTRY(0x83, do_flush_windows) /* Flush Windows Trap */ |
152 | t_clwin:BAD_TRAP(0x84) /* Clean Windows Trap */ |
153 | t_rchk: BAD_TRAP(0x85) /* Range Check */ |
154 | t_funal:BAD_TRAP(0x86) /* Fix Unaligned Access Trap */ |
155 | t_iovf: BAD_TRAP(0x87) /* Integer Overflow Trap */ |
156 | t_bad88:BAD_TRAP(0x88) /* Slowaris System Call */ |
157 | t_bad89:BAD_TRAP(0x89) /* Net-B.S. System Call */ |
158 | t_bad8a:BAD_TRAP(0x8a) BAD_TRAP(0x8b) BAD_TRAP(0x8c) BAD_TRAP(0x8d) BAD_TRAP(0x8e) |
159 | t_bad8f:BAD_TRAP(0x8f) |
160 | t_linux:LINUX_SYSCALL_TRAP /* Linux System Call */ |
161 | t_bad91:BAD_TRAP(0x91) BAD_TRAP(0x92) BAD_TRAP(0x93) BAD_TRAP(0x94) BAD_TRAP(0x95) |
162 | t_bad96:BAD_TRAP(0x96) BAD_TRAP(0x97) BAD_TRAP(0x98) BAD_TRAP(0x99) BAD_TRAP(0x9a) |
163 | t_bad9b:BAD_TRAP(0x9b) BAD_TRAP(0x9c) BAD_TRAP(0x9d) BAD_TRAP(0x9e) BAD_TRAP(0x9f) |
164 | t_getcc:GETCC_TRAP /* Get Condition Codes */ |
165 | t_setcc:SETCC_TRAP /* Set Condition Codes */ |
166 | t_getpsr:GETPSR_TRAP /* Get PSR Register */ |
167 | t_bada3:BAD_TRAP(0xa3) BAD_TRAP(0xa4) BAD_TRAP(0xa5) BAD_TRAP(0xa6) |
168 | t_bada7:BAD_TRAP(0xa7) |
169 | t_bada8:BAD_TRAP(0xa8) BAD_TRAP(0xa9) BAD_TRAP(0xaa) BAD_TRAP(0xab) |
170 | t_badac:BAD_TRAP(0xac) BAD_TRAP(0xad) BAD_TRAP(0xae) BAD_TRAP(0xaf) BAD_TRAP(0xb0) |
171 | t_badb1:BAD_TRAP(0xb1) BAD_TRAP(0xb2) BAD_TRAP(0xb3) BAD_TRAP(0xb4) BAD_TRAP(0xb5) |
172 | t_badb6:BAD_TRAP(0xb6) BAD_TRAP(0xb7) BAD_TRAP(0xb8) BAD_TRAP(0xb9) BAD_TRAP(0xba) |
173 | t_badbb:BAD_TRAP(0xbb) BAD_TRAP(0xbc) BAD_TRAP(0xbd) BAD_TRAP(0xbe) BAD_TRAP(0xbf) |
174 | t_badc0:BAD_TRAP(0xc0) BAD_TRAP(0xc1) BAD_TRAP(0xc2) BAD_TRAP(0xc3) BAD_TRAP(0xc4) |
175 | t_badc5:BAD_TRAP(0xc5) BAD_TRAP(0xc6) BAD_TRAP(0xc7) BAD_TRAP(0xc8) BAD_TRAP(0xc9) |
176 | t_badca:BAD_TRAP(0xca) BAD_TRAP(0xcb) BAD_TRAP(0xcc) BAD_TRAP(0xcd) BAD_TRAP(0xce) |
177 | t_badcf:BAD_TRAP(0xcf) BAD_TRAP(0xd0) BAD_TRAP(0xd1) BAD_TRAP(0xd2) BAD_TRAP(0xd3) |
178 | t_badd4:BAD_TRAP(0xd4) BAD_TRAP(0xd5) BAD_TRAP(0xd6) BAD_TRAP(0xd7) BAD_TRAP(0xd8) |
179 | t_badd9:BAD_TRAP(0xd9) BAD_TRAP(0xda) BAD_TRAP(0xdb) BAD_TRAP(0xdc) BAD_TRAP(0xdd) |
180 | t_badde:BAD_TRAP(0xde) BAD_TRAP(0xdf) BAD_TRAP(0xe0) BAD_TRAP(0xe1) BAD_TRAP(0xe2) |
181 | t_bade3:BAD_TRAP(0xe3) BAD_TRAP(0xe4) BAD_TRAP(0xe5) BAD_TRAP(0xe6) BAD_TRAP(0xe7) |
182 | t_bade8:BAD_TRAP(0xe8) BAD_TRAP(0xe9) BAD_TRAP(0xea) BAD_TRAP(0xeb) BAD_TRAP(0xec) |
183 | t_baded:BAD_TRAP(0xed) BAD_TRAP(0xee) BAD_TRAP(0xef) BAD_TRAP(0xf0) BAD_TRAP(0xf1) |
184 | t_badf2:BAD_TRAP(0xf2) BAD_TRAP(0xf3) BAD_TRAP(0xf4) BAD_TRAP(0xf5) BAD_TRAP(0xf6) |
185 | t_badf7:BAD_TRAP(0xf7) BAD_TRAP(0xf8) BAD_TRAP(0xf9) BAD_TRAP(0xfa) BAD_TRAP(0xfb) |
186 | t_badfc:BAD_TRAP(0xfc) |
187 | t_kgdb: KGDB_TRAP(0xfd) |
188 | dbtrap: BAD_TRAP(0xfe) /* Debugger/PROM breakpoint #1 */ |
189 | dbtrap2:BAD_TRAP(0xff) /* Debugger/PROM breakpoint #2 */ |
190 | |
191 | .globl end_traptable |
192 | end_traptable: |
193 | |
194 | #ifdef CONFIG_SMP |
195 | /* Trap tables for the other cpus. */ |
196 | .globl trapbase_cpu1, trapbase_cpu2, trapbase_cpu3 |
197 | trapbase_cpu1: |
198 | BAD_TRAP(0x0) SRMMU_TFAULT TRAP_ENTRY(0x2, bad_instruction) |
199 | TRAP_ENTRY(0x3, priv_instruction) TRAP_ENTRY(0x4, fpd_trap_handler) |
200 | WINDOW_SPILL WINDOW_FILL TRAP_ENTRY(0x7, mna_handler) |
201 | TRAP_ENTRY(0x8, fpe_trap_handler) SRMMU_DFAULT |
202 | TRAP_ENTRY(0xa, do_tag_overflow) TRAP_ENTRY(0xb, do_watchpoint) |
203 | BAD_TRAP(0xc) BAD_TRAP(0xd) BAD_TRAP(0xe) BAD_TRAP(0xf) BAD_TRAP(0x10) |
204 | TRAP_ENTRY_INTERRUPT(1) TRAP_ENTRY_INTERRUPT(2) |
205 | TRAP_ENTRY_INTERRUPT(3) TRAP_ENTRY_INTERRUPT(4) |
206 | TRAP_ENTRY_INTERRUPT(5) TRAP_ENTRY_INTERRUPT(6) |
207 | TRAP_ENTRY_INTERRUPT(7) TRAP_ENTRY_INTERRUPT(8) |
208 | TRAP_ENTRY_INTERRUPT(9) TRAP_ENTRY_INTERRUPT(10) |
209 | TRAP_ENTRY_INTERRUPT(11) TRAP_ENTRY_INTERRUPT(12) |
210 | TRAP_ENTRY_INTERRUPT(13) TRAP_ENTRY_INTERRUPT(14) |
211 | TRAP_ENTRY(0x1f, linux_trap_ipi15_sun4m) |
212 | TRAP_ENTRY(0x20, do_reg_access) BAD_TRAP(0x21) BAD_TRAP(0x22) |
213 | BAD_TRAP(0x23) TRAP_ENTRY(0x24, do_cp_disabled) SKIP_TRAP(0x25, unimp_flush) |
214 | BAD_TRAP(0x26) BAD_TRAP(0x27) TRAP_ENTRY(0x28, do_cp_exception) |
215 | SRMMU_DFAULT TRAP_ENTRY(0x2a, do_hw_divzero) BAD_TRAP(0x2b) BAD_TRAP(0x2c) |
216 | BAD_TRAP(0x2d) BAD_TRAP(0x2e) BAD_TRAP(0x2f) BAD_TRAP(0x30) BAD_TRAP(0x31) |
217 | BAD_TRAP(0x32) BAD_TRAP(0x33) BAD_TRAP(0x34) BAD_TRAP(0x35) BAD_TRAP(0x36) |
218 | BAD_TRAP(0x37) BAD_TRAP(0x38) BAD_TRAP(0x39) BAD_TRAP(0x3a) BAD_TRAP(0x3b) |
219 | BAD_TRAP(0x3c) BAD_TRAP(0x3d) BAD_TRAP(0x3e) BAD_TRAP(0x3f) BAD_TRAP(0x40) |
220 | BAD_TRAP(0x41) BAD_TRAP(0x42) BAD_TRAP(0x43) BAD_TRAP(0x44) BAD_TRAP(0x45) |
221 | BAD_TRAP(0x46) BAD_TRAP(0x47) BAD_TRAP(0x48) BAD_TRAP(0x49) BAD_TRAP(0x4a) |
222 | BAD_TRAP(0x4b) BAD_TRAP(0x4c) BAD_TRAP(0x4d) BAD_TRAP(0x4e) BAD_TRAP(0x4f) |
223 | BAD_TRAP(0x50) |
224 | BAD_TRAP(0x51) BAD_TRAP(0x52) BAD_TRAP(0x53) BAD_TRAP(0x54) BAD_TRAP(0x55) |
225 | BAD_TRAP(0x56) BAD_TRAP(0x57) BAD_TRAP(0x58) BAD_TRAP(0x59) BAD_TRAP(0x5a) |
226 | BAD_TRAP(0x5b) BAD_TRAP(0x5c) BAD_TRAP(0x5d) BAD_TRAP(0x5e) BAD_TRAP(0x5f) |
227 | BAD_TRAP(0x60) BAD_TRAP(0x61) BAD_TRAP(0x62) BAD_TRAP(0x63) BAD_TRAP(0x64) |
228 | BAD_TRAP(0x65) BAD_TRAP(0x66) BAD_TRAP(0x67) BAD_TRAP(0x68) BAD_TRAP(0x69) |
229 | BAD_TRAP(0x6a) BAD_TRAP(0x6b) BAD_TRAP(0x6c) BAD_TRAP(0x6d) BAD_TRAP(0x6e) |
230 | BAD_TRAP(0x6f) BAD_TRAP(0x70) BAD_TRAP(0x71) BAD_TRAP(0x72) BAD_TRAP(0x73) |
231 | BAD_TRAP(0x74) BAD_TRAP(0x75) BAD_TRAP(0x76) BAD_TRAP(0x77) BAD_TRAP(0x78) |
232 | BAD_TRAP(0x79) BAD_TRAP(0x7a) BAD_TRAP(0x7b) BAD_TRAP(0x7c) BAD_TRAP(0x7d) |
233 | BAD_TRAP(0x7e) BAD_TRAP(0x7f) |
234 | BAD_TRAP(0x80) |
235 | BREAKPOINT_TRAP |
236 | TRAP_ENTRY(0x82, do_hw_divzero) |
237 | TRAP_ENTRY(0x83, do_flush_windows) BAD_TRAP(0x84) BAD_TRAP(0x85) |
238 | BAD_TRAP(0x86) BAD_TRAP(0x87) BAD_TRAP(0x88) |
239 | BAD_TRAP(0x89) BAD_TRAP(0x8a) BAD_TRAP(0x8b) BAD_TRAP(0x8c) |
240 | BAD_TRAP(0x8d) BAD_TRAP(0x8e) BAD_TRAP(0x8f) |
241 | LINUX_SYSCALL_TRAP BAD_TRAP(0x91) BAD_TRAP(0x92) BAD_TRAP(0x93) BAD_TRAP(0x94) |
242 | BAD_TRAP(0x95) BAD_TRAP(0x96) BAD_TRAP(0x97) BAD_TRAP(0x98) BAD_TRAP(0x99) |
243 | BAD_TRAP(0x9a) BAD_TRAP(0x9b) BAD_TRAP(0x9c) BAD_TRAP(0x9d) BAD_TRAP(0x9e) |
244 | BAD_TRAP(0x9f) GETCC_TRAP SETCC_TRAP GETPSR_TRAP |
245 | BAD_TRAP(0xa3) BAD_TRAP(0xa4) BAD_TRAP(0xa5) BAD_TRAP(0xa6) |
246 | BAD_TRAP(0xa7) BAD_TRAP(0xa8) BAD_TRAP(0xa9) BAD_TRAP(0xaa) BAD_TRAP(0xab) |
247 | BAD_TRAP(0xac) BAD_TRAP(0xad) BAD_TRAP(0xae) BAD_TRAP(0xaf) BAD_TRAP(0xb0) |
248 | BAD_TRAP(0xb1) BAD_TRAP(0xb2) BAD_TRAP(0xb3) BAD_TRAP(0xb4) BAD_TRAP(0xb5) |
249 | BAD_TRAP(0xb6) BAD_TRAP(0xb7) BAD_TRAP(0xb8) BAD_TRAP(0xb9) BAD_TRAP(0xba) |
250 | BAD_TRAP(0xbb) BAD_TRAP(0xbc) BAD_TRAP(0xbd) BAD_TRAP(0xbe) BAD_TRAP(0xbf) |
251 | BAD_TRAP(0xc0) BAD_TRAP(0xc1) BAD_TRAP(0xc2) BAD_TRAP(0xc3) BAD_TRAP(0xc4) |
252 | BAD_TRAP(0xc5) BAD_TRAP(0xc6) BAD_TRAP(0xc7) BAD_TRAP(0xc8) BAD_TRAP(0xc9) |
253 | BAD_TRAP(0xca) BAD_TRAP(0xcb) BAD_TRAP(0xcc) BAD_TRAP(0xcd) BAD_TRAP(0xce) |
254 | BAD_TRAP(0xcf) BAD_TRAP(0xd0) BAD_TRAP(0xd1) BAD_TRAP(0xd2) BAD_TRAP(0xd3) |
255 | BAD_TRAP(0xd4) BAD_TRAP(0xd5) BAD_TRAP(0xd6) BAD_TRAP(0xd7) BAD_TRAP(0xd8) |
256 | BAD_TRAP(0xd9) BAD_TRAP(0xda) BAD_TRAP(0xdb) BAD_TRAP(0xdc) BAD_TRAP(0xdd) |
257 | BAD_TRAP(0xde) BAD_TRAP(0xdf) BAD_TRAP(0xe0) BAD_TRAP(0xe1) BAD_TRAP(0xe2) |
258 | BAD_TRAP(0xe3) BAD_TRAP(0xe4) BAD_TRAP(0xe5) BAD_TRAP(0xe6) BAD_TRAP(0xe7) |
259 | BAD_TRAP(0xe8) BAD_TRAP(0xe9) BAD_TRAP(0xea) BAD_TRAP(0xeb) BAD_TRAP(0xec) |
260 | BAD_TRAP(0xed) BAD_TRAP(0xee) BAD_TRAP(0xef) BAD_TRAP(0xf0) BAD_TRAP(0xf1) |
261 | BAD_TRAP(0xf2) BAD_TRAP(0xf3) BAD_TRAP(0xf4) BAD_TRAP(0xf5) BAD_TRAP(0xf6) |
262 | BAD_TRAP(0xf7) BAD_TRAP(0xf8) BAD_TRAP(0xf9) BAD_TRAP(0xfa) BAD_TRAP(0xfb) |
263 | BAD_TRAP(0xfc) KGDB_TRAP(0xfd) BAD_TRAP(0xfe) BAD_TRAP(0xff) |
264 | |
265 | trapbase_cpu2: |
266 | BAD_TRAP(0x0) SRMMU_TFAULT TRAP_ENTRY(0x2, bad_instruction) |
267 | TRAP_ENTRY(0x3, priv_instruction) TRAP_ENTRY(0x4, fpd_trap_handler) |
268 | WINDOW_SPILL WINDOW_FILL TRAP_ENTRY(0x7, mna_handler) |
269 | TRAP_ENTRY(0x8, fpe_trap_handler) SRMMU_DFAULT |
270 | TRAP_ENTRY(0xa, do_tag_overflow) TRAP_ENTRY(0xb, do_watchpoint) |
271 | BAD_TRAP(0xc) BAD_TRAP(0xd) BAD_TRAP(0xe) BAD_TRAP(0xf) BAD_TRAP(0x10) |
272 | TRAP_ENTRY_INTERRUPT(1) TRAP_ENTRY_INTERRUPT(2) |
273 | TRAP_ENTRY_INTERRUPT(3) TRAP_ENTRY_INTERRUPT(4) |
274 | TRAP_ENTRY_INTERRUPT(5) TRAP_ENTRY_INTERRUPT(6) |
275 | TRAP_ENTRY_INTERRUPT(7) TRAP_ENTRY_INTERRUPT(8) |
276 | TRAP_ENTRY_INTERRUPT(9) TRAP_ENTRY_INTERRUPT(10) |
277 | TRAP_ENTRY_INTERRUPT(11) TRAP_ENTRY_INTERRUPT(12) |
278 | TRAP_ENTRY_INTERRUPT(13) TRAP_ENTRY_INTERRUPT(14) |
279 | TRAP_ENTRY(0x1f, linux_trap_ipi15_sun4m) |
280 | TRAP_ENTRY(0x20, do_reg_access) BAD_TRAP(0x21) BAD_TRAP(0x22) |
281 | BAD_TRAP(0x23) TRAP_ENTRY(0x24, do_cp_disabled) SKIP_TRAP(0x25, unimp_flush) |
282 | BAD_TRAP(0x26) BAD_TRAP(0x27) TRAP_ENTRY(0x28, do_cp_exception) |
283 | SRMMU_DFAULT TRAP_ENTRY(0x2a, do_hw_divzero) BAD_TRAP(0x2b) BAD_TRAP(0x2c) |
284 | BAD_TRAP(0x2d) BAD_TRAP(0x2e) BAD_TRAP(0x2f) BAD_TRAP(0x30) BAD_TRAP(0x31) |
285 | BAD_TRAP(0x32) BAD_TRAP(0x33) BAD_TRAP(0x34) BAD_TRAP(0x35) BAD_TRAP(0x36) |
286 | BAD_TRAP(0x37) BAD_TRAP(0x38) BAD_TRAP(0x39) BAD_TRAP(0x3a) BAD_TRAP(0x3b) |
287 | BAD_TRAP(0x3c) BAD_TRAP(0x3d) BAD_TRAP(0x3e) BAD_TRAP(0x3f) BAD_TRAP(0x40) |
288 | BAD_TRAP(0x41) BAD_TRAP(0x42) BAD_TRAP(0x43) BAD_TRAP(0x44) BAD_TRAP(0x45) |
289 | BAD_TRAP(0x46) BAD_TRAP(0x47) BAD_TRAP(0x48) BAD_TRAP(0x49) BAD_TRAP(0x4a) |
290 | BAD_TRAP(0x4b) BAD_TRAP(0x4c) BAD_TRAP(0x4d) BAD_TRAP(0x4e) BAD_TRAP(0x4f) |
291 | BAD_TRAP(0x50) |
292 | BAD_TRAP(0x51) BAD_TRAP(0x52) BAD_TRAP(0x53) BAD_TRAP(0x54) BAD_TRAP(0x55) |
293 | BAD_TRAP(0x56) BAD_TRAP(0x57) BAD_TRAP(0x58) BAD_TRAP(0x59) BAD_TRAP(0x5a) |
294 | BAD_TRAP(0x5b) BAD_TRAP(0x5c) BAD_TRAP(0x5d) BAD_TRAP(0x5e) BAD_TRAP(0x5f) |
295 | BAD_TRAP(0x60) BAD_TRAP(0x61) BAD_TRAP(0x62) BAD_TRAP(0x63) BAD_TRAP(0x64) |
296 | BAD_TRAP(0x65) BAD_TRAP(0x66) BAD_TRAP(0x67) BAD_TRAP(0x68) BAD_TRAP(0x69) |
297 | BAD_TRAP(0x6a) BAD_TRAP(0x6b) BAD_TRAP(0x6c) BAD_TRAP(0x6d) BAD_TRAP(0x6e) |
298 | BAD_TRAP(0x6f) BAD_TRAP(0x70) BAD_TRAP(0x71) BAD_TRAP(0x72) BAD_TRAP(0x73) |
299 | BAD_TRAP(0x74) BAD_TRAP(0x75) BAD_TRAP(0x76) BAD_TRAP(0x77) BAD_TRAP(0x78) |
300 | BAD_TRAP(0x79) BAD_TRAP(0x7a) BAD_TRAP(0x7b) BAD_TRAP(0x7c) BAD_TRAP(0x7d) |
301 | BAD_TRAP(0x7e) BAD_TRAP(0x7f) |
302 | BAD_TRAP(0x80) |
303 | BREAKPOINT_TRAP |
304 | TRAP_ENTRY(0x82, do_hw_divzero) |
305 | TRAP_ENTRY(0x83, do_flush_windows) BAD_TRAP(0x84) BAD_TRAP(0x85) |
306 | BAD_TRAP(0x86) BAD_TRAP(0x87) BAD_TRAP(0x88) |
307 | BAD_TRAP(0x89) BAD_TRAP(0x8a) BAD_TRAP(0x8b) BAD_TRAP(0x8c) |
308 | BAD_TRAP(0x8d) BAD_TRAP(0x8e) BAD_TRAP(0x8f) |
309 | LINUX_SYSCALL_TRAP BAD_TRAP(0x91) BAD_TRAP(0x92) BAD_TRAP(0x93) BAD_TRAP(0x94) |
310 | BAD_TRAP(0x95) BAD_TRAP(0x96) BAD_TRAP(0x97) BAD_TRAP(0x98) BAD_TRAP(0x99) |
311 | BAD_TRAP(0x9a) BAD_TRAP(0x9b) BAD_TRAP(0x9c) BAD_TRAP(0x9d) BAD_TRAP(0x9e) |
312 | BAD_TRAP(0x9f) GETCC_TRAP SETCC_TRAP GETPSR_TRAP |
313 | BAD_TRAP(0xa3) BAD_TRAP(0xa4) BAD_TRAP(0xa5) BAD_TRAP(0xa6) |
314 | BAD_TRAP(0xa7) BAD_TRAP(0xa8) BAD_TRAP(0xa9) BAD_TRAP(0xaa) BAD_TRAP(0xab) |
315 | BAD_TRAP(0xac) BAD_TRAP(0xad) BAD_TRAP(0xae) BAD_TRAP(0xaf) BAD_TRAP(0xb0) |
316 | BAD_TRAP(0xb1) BAD_TRAP(0xb2) BAD_TRAP(0xb3) BAD_TRAP(0xb4) BAD_TRAP(0xb5) |
317 | BAD_TRAP(0xb6) BAD_TRAP(0xb7) BAD_TRAP(0xb8) BAD_TRAP(0xb9) BAD_TRAP(0xba) |
318 | BAD_TRAP(0xbb) BAD_TRAP(0xbc) BAD_TRAP(0xbd) BAD_TRAP(0xbe) BAD_TRAP(0xbf) |
319 | BAD_TRAP(0xc0) BAD_TRAP(0xc1) BAD_TRAP(0xc2) BAD_TRAP(0xc3) BAD_TRAP(0xc4) |
320 | BAD_TRAP(0xc5) BAD_TRAP(0xc6) BAD_TRAP(0xc7) BAD_TRAP(0xc8) BAD_TRAP(0xc9) |
321 | BAD_TRAP(0xca) BAD_TRAP(0xcb) BAD_TRAP(0xcc) BAD_TRAP(0xcd) BAD_TRAP(0xce) |
322 | BAD_TRAP(0xcf) BAD_TRAP(0xd0) BAD_TRAP(0xd1) BAD_TRAP(0xd2) BAD_TRAP(0xd3) |
323 | BAD_TRAP(0xd4) BAD_TRAP(0xd5) BAD_TRAP(0xd6) BAD_TRAP(0xd7) BAD_TRAP(0xd8) |
324 | BAD_TRAP(0xd9) BAD_TRAP(0xda) BAD_TRAP(0xdb) BAD_TRAP(0xdc) BAD_TRAP(0xdd) |
325 | BAD_TRAP(0xde) BAD_TRAP(0xdf) BAD_TRAP(0xe0) BAD_TRAP(0xe1) BAD_TRAP(0xe2) |
326 | BAD_TRAP(0xe3) BAD_TRAP(0xe4) BAD_TRAP(0xe5) BAD_TRAP(0xe6) BAD_TRAP(0xe7) |
327 | BAD_TRAP(0xe8) BAD_TRAP(0xe9) BAD_TRAP(0xea) BAD_TRAP(0xeb) BAD_TRAP(0xec) |
328 | BAD_TRAP(0xed) BAD_TRAP(0xee) BAD_TRAP(0xef) BAD_TRAP(0xf0) BAD_TRAP(0xf1) |
329 | BAD_TRAP(0xf2) BAD_TRAP(0xf3) BAD_TRAP(0xf4) BAD_TRAP(0xf5) BAD_TRAP(0xf6) |
330 | BAD_TRAP(0xf7) BAD_TRAP(0xf8) BAD_TRAP(0xf9) BAD_TRAP(0xfa) BAD_TRAP(0xfb) |
331 | BAD_TRAP(0xfc) KGDB_TRAP(0xfd) BAD_TRAP(0xfe) BAD_TRAP(0xff) |
332 | |
333 | trapbase_cpu3: |
334 | BAD_TRAP(0x0) SRMMU_TFAULT TRAP_ENTRY(0x2, bad_instruction) |
335 | TRAP_ENTRY(0x3, priv_instruction) TRAP_ENTRY(0x4, fpd_trap_handler) |
336 | WINDOW_SPILL WINDOW_FILL TRAP_ENTRY(0x7, mna_handler) |
337 | TRAP_ENTRY(0x8, fpe_trap_handler) SRMMU_DFAULT |
338 | TRAP_ENTRY(0xa, do_tag_overflow) TRAP_ENTRY(0xb, do_watchpoint) |
339 | BAD_TRAP(0xc) BAD_TRAP(0xd) BAD_TRAP(0xe) BAD_TRAP(0xf) BAD_TRAP(0x10) |
340 | TRAP_ENTRY_INTERRUPT(1) TRAP_ENTRY_INTERRUPT(2) |
341 | TRAP_ENTRY_INTERRUPT(3) TRAP_ENTRY_INTERRUPT(4) |
342 | TRAP_ENTRY_INTERRUPT(5) TRAP_ENTRY_INTERRUPT(6) |
343 | TRAP_ENTRY_INTERRUPT(7) TRAP_ENTRY_INTERRUPT(8) |
344 | TRAP_ENTRY_INTERRUPT(9) TRAP_ENTRY_INTERRUPT(10) |
345 | TRAP_ENTRY_INTERRUPT(11) TRAP_ENTRY_INTERRUPT(12) |
346 | TRAP_ENTRY_INTERRUPT(13) TRAP_ENTRY_INTERRUPT(14) |
347 | TRAP_ENTRY(0x1f, linux_trap_ipi15_sun4m) |
348 | TRAP_ENTRY(0x20, do_reg_access) BAD_TRAP(0x21) BAD_TRAP(0x22) |
349 | BAD_TRAP(0x23) TRAP_ENTRY(0x24, do_cp_disabled) SKIP_TRAP(0x25, unimp_flush) |
350 | BAD_TRAP(0x26) BAD_TRAP(0x27) TRAP_ENTRY(0x28, do_cp_exception) |
351 | SRMMU_DFAULT TRAP_ENTRY(0x2a, do_hw_divzero) BAD_TRAP(0x2b) BAD_TRAP(0x2c) |
352 | BAD_TRAP(0x2d) BAD_TRAP(0x2e) BAD_TRAP(0x2f) BAD_TRAP(0x30) BAD_TRAP(0x31) |
353 | BAD_TRAP(0x32) BAD_TRAP(0x33) BAD_TRAP(0x34) BAD_TRAP(0x35) BAD_TRAP(0x36) |
354 | BAD_TRAP(0x37) BAD_TRAP(0x38) BAD_TRAP(0x39) BAD_TRAP(0x3a) BAD_TRAP(0x3b) |
355 | BAD_TRAP(0x3c) BAD_TRAP(0x3d) BAD_TRAP(0x3e) BAD_TRAP(0x3f) BAD_TRAP(0x40) |
356 | BAD_TRAP(0x41) BAD_TRAP(0x42) BAD_TRAP(0x43) BAD_TRAP(0x44) BAD_TRAP(0x45) |
357 | BAD_TRAP(0x46) BAD_TRAP(0x47) BAD_TRAP(0x48) BAD_TRAP(0x49) BAD_TRAP(0x4a) |
358 | BAD_TRAP(0x4b) BAD_TRAP(0x4c) BAD_TRAP(0x4d) BAD_TRAP(0x4e) BAD_TRAP(0x4f) |
359 | BAD_TRAP(0x50) |
360 | BAD_TRAP(0x51) BAD_TRAP(0x52) BAD_TRAP(0x53) BAD_TRAP(0x54) BAD_TRAP(0x55) |
361 | BAD_TRAP(0x56) BAD_TRAP(0x57) BAD_TRAP(0x58) BAD_TRAP(0x59) BAD_TRAP(0x5a) |
362 | BAD_TRAP(0x5b) BAD_TRAP(0x5c) BAD_TRAP(0x5d) BAD_TRAP(0x5e) BAD_TRAP(0x5f) |
363 | BAD_TRAP(0x60) BAD_TRAP(0x61) BAD_TRAP(0x62) BAD_TRAP(0x63) BAD_TRAP(0x64) |
364 | BAD_TRAP(0x65) BAD_TRAP(0x66) BAD_TRAP(0x67) BAD_TRAP(0x68) BAD_TRAP(0x69) |
365 | BAD_TRAP(0x6a) BAD_TRAP(0x6b) BAD_TRAP(0x6c) BAD_TRAP(0x6d) BAD_TRAP(0x6e) |
366 | BAD_TRAP(0x6f) BAD_TRAP(0x70) BAD_TRAP(0x71) BAD_TRAP(0x72) BAD_TRAP(0x73) |
367 | BAD_TRAP(0x74) BAD_TRAP(0x75) BAD_TRAP(0x76) BAD_TRAP(0x77) BAD_TRAP(0x78) |
368 | BAD_TRAP(0x79) BAD_TRAP(0x7a) BAD_TRAP(0x7b) BAD_TRAP(0x7c) BAD_TRAP(0x7d) |
369 | BAD_TRAP(0x7e) BAD_TRAP(0x7f) |
370 | BAD_TRAP(0x80) |
371 | BREAKPOINT_TRAP |
372 | TRAP_ENTRY(0x82, do_hw_divzero) |
373 | TRAP_ENTRY(0x83, do_flush_windows) BAD_TRAP(0x84) BAD_TRAP(0x85) |
374 | BAD_TRAP(0x86) BAD_TRAP(0x87) BAD_TRAP(0x88) |
375 | BAD_TRAP(0x89) BAD_TRAP(0x8a) BAD_TRAP(0x8b) BAD_TRAP(0x8c) |
376 | BAD_TRAP(0x8d) BAD_TRAP(0x8e) BAD_TRAP(0x8f) |
377 | LINUX_SYSCALL_TRAP BAD_TRAP(0x91) BAD_TRAP(0x92) BAD_TRAP(0x93) BAD_TRAP(0x94) |
378 | BAD_TRAP(0x95) BAD_TRAP(0x96) BAD_TRAP(0x97) BAD_TRAP(0x98) BAD_TRAP(0x99) |
379 | BAD_TRAP(0x9a) BAD_TRAP(0x9b) BAD_TRAP(0x9c) BAD_TRAP(0x9d) BAD_TRAP(0x9e) |
380 | BAD_TRAP(0x9f) GETCC_TRAP SETCC_TRAP GETPSR_TRAP |
381 | BAD_TRAP(0xa3) BAD_TRAP(0xa4) BAD_TRAP(0xa5) BAD_TRAP(0xa6) |
382 | BAD_TRAP(0xa7) BAD_TRAP(0xa8) BAD_TRAP(0xa9) BAD_TRAP(0xaa) BAD_TRAP(0xab) |
383 | BAD_TRAP(0xac) BAD_TRAP(0xad) BAD_TRAP(0xae) BAD_TRAP(0xaf) BAD_TRAP(0xb0) |
384 | BAD_TRAP(0xb1) BAD_TRAP(0xb2) BAD_TRAP(0xb3) BAD_TRAP(0xb4) BAD_TRAP(0xb5) |
385 | BAD_TRAP(0xb6) BAD_TRAP(0xb7) BAD_TRAP(0xb8) BAD_TRAP(0xb9) BAD_TRAP(0xba) |
386 | BAD_TRAP(0xbb) BAD_TRAP(0xbc) BAD_TRAP(0xbd) BAD_TRAP(0xbe) BAD_TRAP(0xbf) |
387 | BAD_TRAP(0xc0) BAD_TRAP(0xc1) BAD_TRAP(0xc2) BAD_TRAP(0xc3) BAD_TRAP(0xc4) |
388 | BAD_TRAP(0xc5) BAD_TRAP(0xc6) BAD_TRAP(0xc7) BAD_TRAP(0xc8) BAD_TRAP(0xc9) |
389 | BAD_TRAP(0xca) BAD_TRAP(0xcb) BAD_TRAP(0xcc) BAD_TRAP(0xcd) BAD_TRAP(0xce) |
390 | BAD_TRAP(0xcf) BAD_TRAP(0xd0) BAD_TRAP(0xd1) BAD_TRAP(0xd2) BAD_TRAP(0xd3) |
391 | BAD_TRAP(0xd4) BAD_TRAP(0xd5) BAD_TRAP(0xd6) BAD_TRAP(0xd7) BAD_TRAP(0xd8) |
392 | BAD_TRAP(0xd9) BAD_TRAP(0xda) BAD_TRAP(0xdb) BAD_TRAP(0xdc) BAD_TRAP(0xdd) |
393 | BAD_TRAP(0xde) BAD_TRAP(0xdf) BAD_TRAP(0xe0) BAD_TRAP(0xe1) BAD_TRAP(0xe2) |
394 | BAD_TRAP(0xe3) BAD_TRAP(0xe4) BAD_TRAP(0xe5) BAD_TRAP(0xe6) BAD_TRAP(0xe7) |
395 | BAD_TRAP(0xe8) BAD_TRAP(0xe9) BAD_TRAP(0xea) BAD_TRAP(0xeb) BAD_TRAP(0xec) |
396 | BAD_TRAP(0xed) BAD_TRAP(0xee) BAD_TRAP(0xef) BAD_TRAP(0xf0) BAD_TRAP(0xf1) |
397 | BAD_TRAP(0xf2) BAD_TRAP(0xf3) BAD_TRAP(0xf4) BAD_TRAP(0xf5) BAD_TRAP(0xf6) |
398 | BAD_TRAP(0xf7) BAD_TRAP(0xf8) BAD_TRAP(0xf9) BAD_TRAP(0xfa) BAD_TRAP(0xfb) |
399 | BAD_TRAP(0xfc) KGDB_TRAP(0xfd) BAD_TRAP(0xfe) BAD_TRAP(0xff) |
400 | |
401 | #endif |
402 | .align PAGE_SIZE |
403 | |
404 | /* This was the only reasonable way I could think of to properly align |
405 | * these page-table data structures. |
406 | */ |
407 | .globl pg0, pg1, pg2, pg3 |
408 | .globl empty_bad_page |
409 | .globl empty_bad_page_table |
410 | .globl empty_zero_page |
411 | .globl swapper_pg_dir |
412 | swapper_pg_dir: .skip PAGE_SIZE |
413 | pg0: .skip PAGE_SIZE |
414 | pg1: .skip PAGE_SIZE |
415 | pg2: .skip PAGE_SIZE |
416 | pg3: .skip PAGE_SIZE |
417 | empty_bad_page: .skip PAGE_SIZE |
418 | empty_bad_page_table: .skip PAGE_SIZE |
419 | empty_zero_page: .skip PAGE_SIZE |
420 | |
421 | .global root_flags |
422 | .global ram_flags |
423 | .global root_dev |
424 | .global sparc_ramdisk_image |
425 | .global sparc_ramdisk_size |
426 | |
427 | /* This stuff has to be in sync with SILO and other potential boot loaders |
428 | * Fields should be kept upward compatible and whenever any change is made, |
429 | * HdrS version should be incremented. |
430 | */ |
431 | .ascii "HdrS" |
432 | .word LINUX_VERSION_CODE |
433 | .half 0x0203 /* HdrS version */ |
434 | root_flags: |
435 | .half 1 |
436 | root_dev: |
437 | .half 0 |
438 | ram_flags: |
439 | .half 0 |
440 | sparc_ramdisk_image: |
441 | .word 0 |
442 | sparc_ramdisk_size: |
443 | .word 0 |
444 | .word reboot_command |
445 | .word 0, 0, 0 |
446 | .word _end |
447 | |
448 | /* Cool, here we go. Pick up the romvec pointer in %o0 and stash it in |
449 | * %g7 and at prom_vector_p. And also quickly check whether we are on |
450 | * a v0, v2, or v3 prom. |
451 | */ |
452 | gokernel: |
453 | /* Ok, it's nice to know, as early as possible, if we |
454 | * are already mapped where we expect to be in virtual |
455 | * memory. The Solaris /boot elf format bootloader |
456 | * will peek into our elf header and load us where |
457 | * we want to be, otherwise we have to re-map. |
458 | * |
459 | * Some boot loaders don't place the jmp'rs address |
460 | * in %o7, so we do a pc-relative call to a local |
461 | * label, then see what %o7 has. |
462 | */ |
463 | |
464 | mov %o7, %g4 ! Save %o7 |
465 | |
466 | /* Jump to it, and pray... */ |
467 | current_pc: |
468 | call 1f |
469 | nop |
470 | |
471 | 1: |
472 | mov %o7, %g3 |
473 | |
474 | tst %o0 |
475 | be no_sun4u_here |
476 | mov %g4, %o7 /* Previous %o7. */ |
477 | |
478 | mov %o0, %l0 ! stash away romvec |
479 | mov %o0, %g7 ! put it here too |
480 | mov %o1, %l1 ! stash away debug_vec too |
481 | |
482 | /* Ok, let's check out our run time program counter. */ |
483 | set current_pc, %g5 |
484 | cmp %g3, %g5 |
485 | be already_mapped |
486 | nop |
487 | |
488 | /* %l6 will hold the offset we have to subtract |
489 | * from absolute symbols in order to access areas |
490 | * in our own image. If already mapped this is |
491 | * just plain zero, else it is KERNBASE. |
492 | */ |
493 | set KERNBASE, %l6 |
494 | b copy_prom_lvl14 |
495 | nop |
496 | |
497 | already_mapped: |
498 | mov 0, %l6 |
499 | |
500 | /* Copy over the Prom's level 14 clock handler. */ |
501 | copy_prom_lvl14: |
502 | #if 1 |
503 | /* DJHR |
504 | * preserve our linked/calculated instructions |
505 | */ |
506 | set lvl14_save, %g1 |
507 | set t_irq14, %g3 |
508 | sub %g1, %l6, %g1 ! translate to physical |
509 | sub %g3, %l6, %g3 ! translate to physical |
510 | ldd [%g3], %g4 |
511 | std %g4, [%g1] |
512 | ldd [%g3+8], %g4 |
513 | std %g4, [%g1+8] |
514 | #endif |
515 | rd %tbr, %g1 |
516 | andn %g1, 0xfff, %g1 ! proms trap table base |
517 | or %g0, (0x1e<<4), %g2 ! offset to lvl14 intr |
518 | or %g1, %g2, %g2 |
519 | set t_irq14, %g3 |
520 | sub %g3, %l6, %g3 |
521 | ldd [%g2], %g4 |
522 | std %g4, [%g3] |
523 | ldd [%g2 + 0x8], %g4 |
524 | std %g4, [%g3 + 0x8] ! Copy proms handler |
525 | |
526 | /* Must determine whether we are on a sun4c MMU, SRMMU, or SUN4/400 MUTANT |
527 | * MMU so we can remap ourselves properly. DON'T TOUCH %l0 thru %l5 in these |
528 | * remapping routines, we need their values afterwards! |
529 | */ |
530 | /* Now check whether we are already mapped, if we |
531 | * are we can skip all this garbage coming up. |
532 | */ |
533 | copy_prom_done: |
534 | cmp %l6, 0 |
535 | be go_to_highmem ! this will be a nop then |
536 | nop |
537 | |
538 | set LOAD_ADDR, %g6 |
539 | cmp %g7, %g6 |
540 | bne remap_not_a_sun4 ! This is not a Sun4 |
541 | nop |
542 | |
543 | or %g0, 0x1, %g1 |
544 | lduba [%g1] ASI_CONTROL, %g1 ! Only safe to try on Sun4. |
545 | subcc %g1, 0x24, %g0 ! Is this a mutant Sun4/400??? |
546 | be sun4_mutant_remap ! Ugh, it is... |
547 | nop |
548 | |
549 | b sun4_normal_remap ! regular sun4, 2 level mmu |
550 | nop |
551 | |
552 | remap_not_a_sun4: |
553 | lda [%g0] ASI_M_MMUREGS, %g1 ! same as ASI_PTE on sun4c |
554 | and %g1, 0x1, %g1 ! Test SRMMU Enable bit ;-) |
555 | cmp %g1, 0x0 |
556 | be sun4c_remap ! A sun4c MMU or normal Sun4 |
557 | nop |
558 | srmmu_remap: |
559 | /* First, check for a viking (TI) module. */ |
560 | set 0x40000000, %g2 |
561 | rd %psr, %g3 |
562 | and %g2, %g3, %g3 |
563 | subcc %g3, 0x0, %g0 |
564 | bz srmmu_nviking |
565 | nop |
566 | |
567 | /* Figure out what kind of viking we are on. |
568 | * We need to know if we have to play with the |
569 | * AC bit and disable traps or not. |
570 | */ |
571 | |
572 | /* I've only seen MicroSparc's on SparcClassics with this |
573 | * bit set. |
574 | */ |
575 | set 0x800, %g2 |
576 | lda [%g0] ASI_M_MMUREGS, %g3 ! peek in the control reg |
577 | and %g2, %g3, %g3 |
578 | subcc %g3, 0x0, %g0 |
579 | bnz srmmu_nviking ! is in mbus mode |
580 | nop |
581 | |
582 | rd %psr, %g3 ! DO NOT TOUCH %g3 |
583 | andn %g3, PSR_ET, %g2 |
584 | wr %g2, 0x0, %psr |
585 | WRITE_PAUSE |
586 | |
587 | /* Get context table pointer, then convert to |
588 | * a physical address, which is 36 bits. |
589 | */ |
590 | set AC_M_CTPR, %g4 |
591 | lda [%g4] ASI_M_MMUREGS, %g4 |
592 | sll %g4, 0x4, %g4 ! We use this below |
593 | ! DO NOT TOUCH %g4 |
594 | |
595 | /* Set the AC bit in the Viking's MMU control reg. */ |
596 | lda [%g0] ASI_M_MMUREGS, %g5 ! DO NOT TOUCH %g5 |
597 | set 0x8000, %g6 ! AC bit mask |
598 | or %g5, %g6, %g6 ! Or it in... |
599 | sta %g6, [%g0] ASI_M_MMUREGS ! Close your eyes... |
600 | |
601 | /* Grrr, why does it seem like every other load/store |
602 | * on the sun4m is in some ASI space... |
603 | * Fine with me, let's get the pointer to the level 1 |
604 | * page table directory and fetch its entry. |
605 | */ |
606 | lda [%g4] ASI_M_BYPASS, %o1 ! This is a level 1 ptr |
607 | srl %o1, 0x4, %o1 ! Clear low 4 bits |
608 | sll %o1, 0x8, %o1 ! Make physical |
609 | |
610 | /* Ok, pull in the PTD. */ |
611 | lda [%o1] ASI_M_BYPASS, %o2 ! This is the 0x0 16MB pgd |
612 | |
613 | /* Calculate to KERNBASE entry. */ |
614 | add %o1, KERNBASE >> (SRMMU_PGDIR_SHIFT - 2), %o3 |
615 | |
616 | /* Poke the entry into the calculated address. */ |
617 | sta %o2, [%o3] ASI_M_BYPASS |
618 | |
619 | /* I don't get it Sun, if you engineered all these |
620 | * boot loaders and the PROM (thank you for the debugging |
621 | * features btw) why did you not have them load kernel |
622 | * images up in high address space, since this is necessary |
623 | * for ABI compliance anyways? Does this low-mapping provide |
624 | * enhanced interoperability? |
625 | * |
626 | * "The PROM is the computer." |
627 | */ |
628 | |
629 | /* Ok, restore the MMU control register we saved in %g5 */ |
630 | sta %g5, [%g0] ASI_M_MMUREGS ! POW... ouch |
631 | |
632 | /* Turn traps back on. We saved it in %g3 earlier. */ |
633 | wr %g3, 0x0, %psr ! tick tock, tick tock |
634 | |
635 | /* Now we burn precious CPU cycles due to bad engineering. */ |
636 | WRITE_PAUSE |
637 | |
638 | /* Wow, all that just to move a 32-bit value from one |
639 | * place to another... Jump to high memory. |
640 | */ |
641 | b go_to_highmem |
642 | nop |
643 | |
644 | /* This works on viking's in Mbus mode and all |
645 | * other MBUS modules. It is virtually the same as |
646 | * the above madness sans turning traps off and flipping |
647 | * the AC bit. |
648 | */ |
649 | srmmu_nviking: |
650 | set AC_M_CTPR, %g1 |
651 | lda [%g1] ASI_M_MMUREGS, %g1 ! get ctx table ptr |
652 | sll %g1, 0x4, %g1 ! make physical addr |
653 | lda [%g1] ASI_M_BYPASS, %g1 ! ptr to level 1 pg_table |
654 | srl %g1, 0x4, %g1 |
655 | sll %g1, 0x8, %g1 ! make phys addr for l1 tbl |
656 | |
657 | lda [%g1] ASI_M_BYPASS, %g2 ! get level1 entry for 0x0 |
658 | add %g1, KERNBASE >> (SRMMU_PGDIR_SHIFT - 2), %g3 |
659 | sta %g2, [%g3] ASI_M_BYPASS ! place at KERNBASE entry |
660 | b go_to_highmem |
661 | nop ! wheee.... |
662 | |
663 | /* This remaps the kernel on Sun4/4xx machines |
664 | * that have the Sun Mutant Three Level MMU. |
665 | * It's like a platypus, Sun didn't have the |
666 | * SRMMU in conception so they kludged the three |
667 | * level logic in the regular Sun4 MMU probably. |
668 | * |
669 | * Basically, you take each entry in the top level |
670 | * directory that maps the low 3MB starting at |
671 | * address zero and put the mapping in the KERNBASE |
672 | * slots. These top level pgd's are called regmaps. |
673 | */ |
674 | sun4_mutant_remap: |
675 | or %g0, %g0, %g3 ! source base |
676 | sethi %hi(KERNBASE), %g4 ! destination base |
677 | or %g4, %lo(KERNBASE), %g4 |
678 | sethi %hi(0x300000), %g5 |
679 | or %g5, %lo(0x300000), %g5 ! upper bound 3MB |
680 | or %g0, 0x1, %l6 |
681 | sll %l6, 24, %l6 ! Regmap mapping size |
682 | add %g3, 0x2, %g3 ! Base magic |
683 | add %g4, 0x2, %g4 ! Base magic |
684 | |
685 | /* Main remapping loop on Sun4-Mutant-MMU. |
686 | * "I am not an animal..." -Famous Mutant Person |
687 | */ |
688 | sun4_mutant_loop: |
689 | lduha [%g3] ASI_REGMAP, %g2 ! Get lower entry |
690 | stha %g2, [%g4] ASI_REGMAP ! Store in high entry |
691 | add %g4, %l6, %g4 ! Move up high memory ptr |
692 | subcc %g3, %g5, %g0 ! Reached our limit? |
693 | blu sun4_mutant_loop ! Nope, loop again |
694 | add %g3, %l6, %g3 ! delay, Move up low ptr |
695 | b go_to_highmem ! Jump to high memory. |
696 | nop |
697 | |
698 | /* The following is for non-4/4xx sun4 MMU's. */ |
699 | sun4_normal_remap: |
700 | mov 0, %g3 ! source base |
701 | set KERNBASE, %g4 ! destination base |
702 | set 0x300000, %g5 ! upper bound 3MB |
703 | mov 1, %l6 |
704 | sll %l6, 18, %l6 ! sun4 mmu segmap size |
705 | sun4_normal_loop: |
706 | lduha [%g3] ASI_SEGMAP, %g6 ! load phys_seg |
707 | stha %g6, [%g4] ASI_SEGMAP ! stort new virt mapping |
708 | add %g3, %l6, %g3 ! increment source pointer |
709 | subcc %g3, %g5, %g0 ! reached limit? |
710 | blu sun4_normal_loop ! nope, loop again |
711 | add %g4, %l6, %g4 ! delay, increment dest ptr |
712 | b go_to_highmem |
713 | nop |
714 | |
715 | /* The following works for Sun4c MMU's */ |
716 | sun4c_remap: |
717 | mov 0, %g3 ! source base |
718 | set KERNBASE, %g4 ! destination base |
719 | set 0x300000, %g5 ! upper bound 3MB |
720 | mov 1, %l6 |
721 | sll %l6, 18, %l6 ! sun4c mmu segmap size |
722 | sun4c_remap_loop: |
723 | lda [%g3] ASI_SEGMAP, %g6 ! load phys_seg |
724 | sta %g6, [%g4] ASI_SEGMAP ! store new virt mapping |
725 | add %g3, %l6, %g3 ! Increment source ptr |
726 | subcc %g3, %g5, %g0 ! Reached limit? |
727 | bl sun4c_remap_loop ! Nope, loop again |
728 | add %g4, %l6, %g4 ! delay, Increment dest ptr |
729 | |
730 | /* Now do a non-relative jump so that PC is in high-memory */ |
731 | go_to_highmem: |
732 | set execute_in_high_mem, %g1 |
733 | jmpl %g1, %g0 |
734 | nop |
735 | |
736 | /* The code above should be at beginning and we have to take care about |
737 | * short jumps, as branching to .init.text section from .text is usually |
738 | * impossible */ |
739 | __INIT |
740 | /* Acquire boot time privileged register values, this will help debugging. |
741 | * I figure out and store nwindows and nwindowsm1 later on. |
742 | */ |
743 | execute_in_high_mem: |
744 | mov %l0, %o0 ! put back romvec |
745 | mov %l1, %o1 ! and debug_vec |
746 | |
747 | sethi %hi(prom_vector_p), %g1 |
748 | st %o0, [%g1 + %lo(prom_vector_p)] |
749 | |
750 | sethi %hi(linux_dbvec), %g1 |
751 | st %o1, [%g1 + %lo(linux_dbvec)] |
752 | |
753 | ld [%o0 + 0x4], %o3 |
754 | and %o3, 0x3, %o5 ! get the version |
755 | |
756 | cmp %o3, 0x2 ! a v2 prom? |
757 | be found_version |
758 | nop |
759 | |
760 | /* paul@sfe.com.au */ |
761 | cmp %o3, 0x3 ! a v3 prom? |
762 | be found_version |
763 | nop |
764 | |
765 | /* Old sun4's pass our load address into %o0 instead of the prom |
766 | * pointer. On sun4's you have to hard code the romvec pointer into |
767 | * your code. Sun probably still does that because they don't even |
768 | * trust their own "OpenBoot" specifications. |
769 | */ |
770 | set LOAD_ADDR, %g6 |
771 | cmp %o0, %g6 ! an old sun4? |
772 | be sun4_init |
773 | nop |
774 | |
775 | found_version: |
776 | /* Get the machine type via the mysterious romvec node operations. */ |
777 | |
778 | add %g7, 0x1c, %l1 |
779 | ld [%l1], %l0 |
780 | ld [%l0], %l0 |
781 | call %l0 |
782 | or %g0, %g0, %o0 ! next_node(0) = first_node |
783 | or %o0, %g0, %g6 |
784 | |
785 | sethi %hi(cputypvar), %o1 ! First node has cpu-arch |
786 | or %o1, %lo(cputypvar), %o1 |
787 | sethi %hi(cputypval), %o2 ! information, the string |
788 | or %o2, %lo(cputypval), %o2 |
789 | ld [%l1], %l0 ! 'compatibility' tells |
790 | ld [%l0 + 0xc], %l0 ! that we want 'sun4x' where |
791 | call %l0 ! x is one of '', 'c', 'm', |
792 | nop ! 'd' or 'e'. %o2 holds pointer |
793 | ! to a buf where above string |
794 | ! will get stored by the prom. |
795 | |
796 | subcc %o0, %g0, %g0 |
797 | bpos got_prop ! Got the property |
798 | nop |
799 | |
800 | or %g6, %g0, %o0 |
801 | sethi %hi(cputypvar_sun4m), %o1 |
802 | or %o1, %lo(cputypvar_sun4m), %o1 |
803 | sethi %hi(cputypval), %o2 |
804 | or %o2, %lo(cputypval), %o2 |
805 | ld [%l1], %l0 |
806 | ld [%l0 + 0xc], %l0 |
807 | call %l0 |
808 | nop |
809 | |
810 | got_prop: |
811 | #ifdef CONFIG_SPARC_LEON |
812 | /* no cpu-type check is needed, it is a SPARC-LEON */ |
813 | |
814 | sethi %hi(boot_cpu_id), %g2 ! boot-cpu index |
815 | |
816 | #ifdef CONFIG_SMP |
817 | ldub [%g2 + %lo(boot_cpu_id)], %g1 |
818 | cmp %g1, 0xff ! unset means first CPU |
819 | bne leon_smp_cpu_startup ! continue only with master |
820 | nop |
821 | #endif |
822 | /* Get CPU-ID from most significant 4-bit of ASR17 */ |
823 | rd %asr17, %g1 |
824 | srl %g1, 28, %g1 |
825 | |
826 | /* Update boot_cpu_id only on boot cpu */ |
827 | stub %g1, [%g2 + %lo(boot_cpu_id)] |
828 | |
829 | ba sun4c_continue_boot |
830 | nop |
831 | #endif |
832 | set cputypval, %o2 |
833 | ldub [%o2 + 0x4], %l1 |
834 | |
835 | cmp %l1, ' ' |
836 | be 1f |
837 | cmp %l1, 'c' |
838 | be 1f |
839 | cmp %l1, 'm' |
840 | be 1f |
841 | cmp %l1, 's' |
842 | be 1f |
843 | cmp %l1, 'd' |
844 | be 1f |
845 | cmp %l1, 'e' |
846 | be no_sun4e_here ! Could be a sun4e. |
847 | nop |
848 | b no_sun4u_here ! AIEEE, a V9 sun4u... Get our BIG BROTHER kernel :)) |
849 | nop |
850 | |
851 | 1: set cputypval, %l1 |
852 | ldub [%l1 + 0x4], %l1 |
853 | cmp %l1, 'm' ! Test for sun4d, sun4e ? |
854 | be sun4m_init |
855 | cmp %l1, 's' ! Treat sun4s as sun4m |
856 | be sun4m_init |
857 | cmp %l1, 'd' ! Let us see how the beast will die |
858 | be sun4d_init |
859 | nop |
860 | |
861 | /* Jump into mmu context zero. */ |
862 | set AC_CONTEXT, %g1 |
863 | stba %g0, [%g1] ASI_CONTROL |
864 | |
865 | b sun4c_continue_boot |
866 | nop |
867 | |
868 | /* CPUID in bootbus can be found at PA 0xff0140000 */ |
869 | #define SUN4D_BOOTBUS_CPUID 0xf0140000 |
870 | |
871 | sun4d_init: |
872 | /* Need to patch call to handler_irq */ |
873 | set patch_handler_irq, %g4 |
874 | set sun4d_handler_irq, %g5 |
875 | sethi %hi(0x40000000), %g3 ! call |
876 | sub %g5, %g4, %g5 |
877 | srl %g5, 2, %g5 |
878 | or %g5, %g3, %g5 |
879 | st %g5, [%g4] |
880 | |
881 | #ifdef CONFIG_SMP |
882 | /* Get our CPU id out of bootbus */ |
883 | set SUN4D_BOOTBUS_CPUID, %g3 |
884 | lduba [%g3] ASI_M_CTL, %g3 |
885 | and %g3, 0xf8, %g3 |
886 | srl %g3, 3, %g4 |
887 | sta %g4, [%g0] ASI_M_VIKING_TMP1 |
888 | sethi %hi(boot_cpu_id), %g5 |
889 | stb %g4, [%g5 + %lo(boot_cpu_id)] |
890 | #endif |
891 | |
892 | /* Fall through to sun4m_init */ |
893 | |
894 | sun4m_init: |
895 | /* XXX Fucking Cypress... */ |
896 | lda [%g0] ASI_M_MMUREGS, %g5 |
897 | srl %g5, 28, %g4 |
898 | |
899 | cmp %g4, 1 |
900 | bne 1f |
901 | srl %g5, 24, %g4 |
902 | |
903 | and %g4, 0xf, %g4 |
904 | cmp %g4, 7 /* This would be a HyperSparc. */ |
905 | |
906 | bne 2f |
907 | nop |
908 | |
909 | 1: |
910 | |
911 | #define PATCH_IT(dst, src) \ |
912 | set (dst), %g5; \ |
913 | set (src), %g4; \ |
914 | ld [%g4], %g3; \ |
915 | st %g3, [%g5]; \ |
916 | ld [%g4+0x4], %g3; \ |
917 | st %g3, [%g5+0x4]; |
918 | |
919 | /* Signed multiply. */ |
920 | PATCH_IT(.mul, .mul_patch) |
921 | PATCH_IT(.mul+0x08, .mul_patch+0x08) |
922 | |
923 | /* Signed remainder. */ |
924 | PATCH_IT(.rem, .rem_patch) |
925 | PATCH_IT(.rem+0x08, .rem_patch+0x08) |
926 | PATCH_IT(.rem+0x10, .rem_patch+0x10) |
927 | PATCH_IT(.rem+0x18, .rem_patch+0x18) |
928 | PATCH_IT(.rem+0x20, .rem_patch+0x20) |
929 | PATCH_IT(.rem+0x28, .rem_patch+0x28) |
930 | |
931 | /* Signed division. */ |
932 | PATCH_IT(.div, .div_patch) |
933 | PATCH_IT(.div+0x08, .div_patch+0x08) |
934 | PATCH_IT(.div+0x10, .div_patch+0x10) |
935 | PATCH_IT(.div+0x18, .div_patch+0x18) |
936 | PATCH_IT(.div+0x20, .div_patch+0x20) |
937 | |
938 | /* Unsigned multiply. */ |
939 | PATCH_IT(.umul, .umul_patch) |
940 | PATCH_IT(.umul+0x08, .umul_patch+0x08) |
941 | |
942 | /* Unsigned remainder. */ |
943 | PATCH_IT(.urem, .urem_patch) |
944 | PATCH_IT(.urem+0x08, .urem_patch+0x08) |
945 | PATCH_IT(.urem+0x10, .urem_patch+0x10) |
946 | PATCH_IT(.urem+0x18, .urem_patch+0x18) |
947 | |
948 | /* Unsigned division. */ |
949 | PATCH_IT(.udiv, .udiv_patch) |
950 | PATCH_IT(.udiv+0x08, .udiv_patch+0x08) |
951 | PATCH_IT(.udiv+0x10, .udiv_patch+0x10) |
952 | |
953 | #undef PATCH_IT |
954 | |
955 | /* Ok, the PROM could have done funny things and apple cider could still |
956 | * be sitting in the fault status/address registers. Read them all to |
957 | * clear them so we don't get magic faults later on. |
958 | */ |
959 | /* This sucks, apparently this makes Vikings call prom panic, will fix later */ |
960 | 2: |
961 | rd %psr, %o1 |
962 | srl %o1, 28, %o1 ! Get a type of the CPU |
963 | |
964 | subcc %o1, 4, %g0 ! TI: Viking or MicroSPARC |
965 | be sun4c_continue_boot |
966 | nop |
967 | |
968 | set AC_M_SFSR, %o0 |
969 | lda [%o0] ASI_M_MMUREGS, %g0 |
970 | set AC_M_SFAR, %o0 |
971 | lda [%o0] ASI_M_MMUREGS, %g0 |
972 | |
973 | /* Fujitsu MicroSPARC-II has no asynchronous flavors of FARs */ |
974 | subcc %o1, 0, %g0 |
975 | be sun4c_continue_boot |
976 | nop |
977 | |
978 | set AC_M_AFSR, %o0 |
979 | lda [%o0] ASI_M_MMUREGS, %g0 |
980 | set AC_M_AFAR, %o0 |
981 | lda [%o0] ASI_M_MMUREGS, %g0 |
982 | nop |
983 | |
984 | |
985 | sun4c_continue_boot: |
986 | |
987 | |
988 | /* Aieee, now set PC and nPC, enable traps, give ourselves a stack and it's |
989 | * show-time! |
990 | */ |
991 | |
992 | sethi %hi(cputyp), %o0 |
993 | st %g4, [%o0 + %lo(cputyp)] |
994 | |
995 | /* Turn on Supervisor, EnableFloating, and all the PIL bits. |
996 | * Also puts us in register window zero with traps off. |
997 | */ |
998 | set (PSR_PS | PSR_S | PSR_PIL | PSR_EF), %g2 |
999 | wr %g2, 0x0, %psr |
1000 | WRITE_PAUSE |
1001 | |
1002 | /* I want a kernel stack NOW! */ |
1003 | set init_thread_union, %g1 |
1004 | set (THREAD_SIZE - STACKFRAME_SZ), %g2 |
1005 | add %g1, %g2, %sp |
1006 | mov 0, %fp /* And for good luck */ |
1007 | |
1008 | /* Zero out our BSS section. */ |
1009 | set __bss_start , %o0 ! First address of BSS |
1010 | set _end , %o1 ! Last address of BSS |
1011 | add %o0, 0x1, %o0 |
1012 | 1: |
1013 | stb %g0, [%o0] |
1014 | subcc %o0, %o1, %g0 |
1015 | bl 1b |
1016 | add %o0, 0x1, %o0 |
1017 | |
1018 | /* If boot_cpu_id has not been setup by machine specific |
1019 | * init-code above we default it to zero. |
1020 | */ |
1021 | sethi %hi(boot_cpu_id), %g2 |
1022 | ldub [%g2 + %lo(boot_cpu_id)], %g3 |
1023 | cmp %g3, 0xff |
1024 | bne 1f |
1025 | nop |
1026 | mov %g0, %g3 |
1027 | stub %g3, [%g2 + %lo(boot_cpu_id)] |
1028 | |
1029 | 1: /* boot_cpu_id set. calculate boot_cpu_id4 = boot_cpu_id*4 */ |
1030 | sll %g3, 2, %g3 |
1031 | sethi %hi(boot_cpu_id4), %g2 |
1032 | stub %g3, [%g2 + %lo(boot_cpu_id4)] |
1033 | |
1034 | /* Initialize the uwinmask value for init task just in case. |
1035 | * But first make current_set[boot_cpu_id] point to something useful. |
1036 | */ |
1037 | set init_thread_union, %g6 |
1038 | set current_set, %g2 |
1039 | #ifdef CONFIG_SMP |
1040 | st %g6, [%g2] |
1041 | add %g2, %g3, %g2 |
1042 | #endif |
1043 | st %g6, [%g2] |
1044 | |
1045 | st %g0, [%g6 + TI_UWINMASK] |
1046 | |
1047 | /* Compute NWINDOWS and stash it away. Now uses %wim trick explained |
1048 | * in the V8 manual. Ok, this method seems to work, Sparc is cool... |
1049 | * No, it doesn't work, have to play the save/readCWP/restore trick. |
1050 | */ |
1051 | |
1052 | wr %g0, 0x0, %wim ! so we do not get a trap |
1053 | WRITE_PAUSE |
1054 | |
1055 | save |
1056 | |
1057 | rd %psr, %g3 |
1058 | |
1059 | restore |
1060 | |
1061 | and %g3, 0x1f, %g3 |
1062 | add %g3, 0x1, %g3 |
1063 | |
1064 | mov 2, %g1 |
1065 | wr %g1, 0x0, %wim ! make window 1 invalid |
1066 | WRITE_PAUSE |
1067 | |
1068 | cmp %g3, 0x7 |
1069 | bne 2f |
1070 | nop |
1071 | |
1072 | /* Adjust our window handling routines to |
1073 | * do things correctly on 7 window Sparcs. |
1074 | */ |
1075 | |
1076 | #define PATCH_INSN(src, dest) \ |
1077 | set src, %g5; \ |
1078 | set dest, %g2; \ |
1079 | ld [%g5], %g4; \ |
1080 | st %g4, [%g2]; |
1081 | |
1082 | /* Patch for window spills... */ |
1083 | PATCH_INSN(spnwin_patch1_7win, spnwin_patch1) |
1084 | PATCH_INSN(spnwin_patch2_7win, spnwin_patch2) |
1085 | PATCH_INSN(spnwin_patch3_7win, spnwin_patch3) |
1086 | |
1087 | /* Patch for window fills... */ |
1088 | PATCH_INSN(fnwin_patch1_7win, fnwin_patch1) |
1089 | PATCH_INSN(fnwin_patch2_7win, fnwin_patch2) |
1090 | |
1091 | /* Patch for trap entry setup... */ |
1092 | PATCH_INSN(tsetup_7win_patch1, tsetup_patch1) |
1093 | PATCH_INSN(tsetup_7win_patch2, tsetup_patch2) |
1094 | PATCH_INSN(tsetup_7win_patch3, tsetup_patch3) |
1095 | PATCH_INSN(tsetup_7win_patch4, tsetup_patch4) |
1096 | PATCH_INSN(tsetup_7win_patch5, tsetup_patch5) |
1097 | PATCH_INSN(tsetup_7win_patch6, tsetup_patch6) |
1098 | |
1099 | /* Patch for returning from traps... */ |
1100 | PATCH_INSN(rtrap_7win_patch1, rtrap_patch1) |
1101 | PATCH_INSN(rtrap_7win_patch2, rtrap_patch2) |
1102 | PATCH_INSN(rtrap_7win_patch3, rtrap_patch3) |
1103 | PATCH_INSN(rtrap_7win_patch4, rtrap_patch4) |
1104 | PATCH_INSN(rtrap_7win_patch5, rtrap_patch5) |
1105 | |
1106 | /* Patch for killing user windows from the register file. */ |
1107 | PATCH_INSN(kuw_patch1_7win, kuw_patch1) |
1108 | |
1109 | /* Now patch the kernel window flush sequences. |
1110 | * This saves 2 traps on every switch and fork. |
1111 | */ |
1112 | set 0x01000000, %g4 |
1113 | set flush_patch_one, %g5 |
1114 | st %g4, [%g5 + 0x18] |
1115 | st %g4, [%g5 + 0x1c] |
1116 | set flush_patch_two, %g5 |
1117 | st %g4, [%g5 + 0x18] |
1118 | st %g4, [%g5 + 0x1c] |
1119 | set flush_patch_three, %g5 |
1120 | st %g4, [%g5 + 0x18] |
1121 | st %g4, [%g5 + 0x1c] |
1122 | set flush_patch_four, %g5 |
1123 | st %g4, [%g5 + 0x18] |
1124 | st %g4, [%g5 + 0x1c] |
1125 | set flush_patch_exception, %g5 |
1126 | st %g4, [%g5 + 0x18] |
1127 | st %g4, [%g5 + 0x1c] |
1128 | set flush_patch_switch, %g5 |
1129 | st %g4, [%g5 + 0x18] |
1130 | st %g4, [%g5 + 0x1c] |
1131 | |
1132 | 2: |
1133 | sethi %hi(nwindows), %g4 |
1134 | st %g3, [%g4 + %lo(nwindows)] ! store final value |
1135 | sub %g3, 0x1, %g3 |
1136 | sethi %hi(nwindowsm1), %g4 |
1137 | st %g3, [%g4 + %lo(nwindowsm1)] |
1138 | |
1139 | /* Here we go, start using Linux's trap table... */ |
1140 | set trapbase, %g3 |
1141 | wr %g3, 0x0, %tbr |
1142 | WRITE_PAUSE |
1143 | |
1144 | /* Finally, turn on traps so that we can call c-code. */ |
1145 | rd %psr, %g3 |
1146 | wr %g3, 0x0, %psr |
1147 | WRITE_PAUSE |
1148 | |
1149 | wr %g3, PSR_ET, %psr |
1150 | WRITE_PAUSE |
1151 | |
1152 | /* First we call prom_init() to set up PROMLIB, then |
1153 | * off to start_kernel(). |
1154 | */ |
1155 | |
1156 | sethi %hi(prom_vector_p), %g5 |
1157 | ld [%g5 + %lo(prom_vector_p)], %o0 |
1158 | call prom_init |
1159 | nop |
1160 | |
1161 | call start_kernel |
1162 | nop |
1163 | |
1164 | /* We should not get here. */ |
1165 | call halt_me |
1166 | nop |
1167 | |
1168 | sun4_init: |
1169 | sethi %hi(SUN4_PROM_VECTOR+0x84), %o1 |
1170 | ld [%o1 + %lo(SUN4_PROM_VECTOR+0x84)], %o1 |
1171 | set sun4_notsup, %o0 |
1172 | call %o1 /* printf */ |
1173 | nop |
1174 | sethi %hi(SUN4_PROM_VECTOR+0xc4), %o1 |
1175 | ld [%o1 + %lo(SUN4_PROM_VECTOR+0xc4)], %o1 |
1176 | call %o1 /* exittomon */ |
1177 | nop |
1178 | 1: ba 1b ! Cannot exit into KMON |
1179 | nop |
1180 | |
1181 | no_sun4e_here: |
1182 | ld [%g7 + 0x68], %o1 |
1183 | set sun4e_notsup, %o0 |
1184 | call %o1 |
1185 | nop |
1186 | b halt_me |
1187 | nop |
1188 | |
1189 | __INITDATA |
1190 | |
1191 | sun4u_1: |
1192 | .asciz "finddevice" |
1193 | .align 4 |
1194 | sun4u_2: |
1195 | .asciz "/chosen" |
1196 | .align 4 |
1197 | sun4u_3: |
1198 | .asciz "getprop" |
1199 | .align 4 |
1200 | sun4u_4: |
1201 | .asciz "stdout" |
1202 | .align 4 |
1203 | sun4u_5: |
1204 | .asciz "write" |
1205 | .align 4 |
1206 | sun4u_6: |
1207 | .asciz "\n\rOn sun4u you have to use UltraLinux (64bit) kernel\n\rand not a 32bit sun4[cdem] version\n\r\n\r" |
1208 | sun4u_6e: |
1209 | .align 4 |
1210 | sun4u_7: |
1211 | .asciz "exit" |
1212 | .align 8 |
1213 | sun4u_a1: |
1214 | .word 0, sun4u_1, 0, 1, 0, 1, 0, sun4u_2, 0 |
1215 | sun4u_r1: |
1216 | .word 0 |
1217 | sun4u_a2: |
1218 | .word 0, sun4u_3, 0, 4, 0, 1, 0 |
1219 | sun4u_i2: |
1220 | .word 0, 0, sun4u_4, 0, sun4u_1, 0, 8, 0 |
1221 | sun4u_r2: |
1222 | .word 0 |
1223 | sun4u_a3: |
1224 | .word 0, sun4u_5, 0, 3, 0, 1, 0 |
1225 | sun4u_i3: |
1226 | .word 0, 0, sun4u_6, 0, sun4u_6e - sun4u_6 - 1, 0 |
1227 | sun4u_r3: |
1228 | .word 0 |
1229 | sun4u_a4: |
1230 | .word 0, sun4u_7, 0, 0, 0, 0 |
1231 | sun4u_r4: |
1232 | |
1233 | __INIT |
1234 | no_sun4u_here: |
1235 | set sun4u_a1, %o0 |
1236 | set current_pc, %l2 |
1237 | cmp %l2, %g3 |
1238 | be 1f |
1239 | mov %o4, %l0 |
1240 | sub %g3, %l2, %l6 |
1241 | add %o0, %l6, %o0 |
1242 | mov %o0, %l4 |
1243 | mov sun4u_r4 - sun4u_a1, %l3 |
1244 | ld [%l4], %l5 |
1245 | 2: |
1246 | add %l4, 4, %l4 |
1247 | cmp %l5, %l2 |
1248 | add %l5, %l6, %l5 |
1249 | bgeu,a 3f |
1250 | st %l5, [%l4 - 4] |
1251 | 3: |
1252 | subcc %l3, 4, %l3 |
1253 | bne 2b |
1254 | ld [%l4], %l5 |
1255 | 1: |
1256 | call %l0 |
1257 | mov %o0, %l1 |
1258 | |
1259 | ld [%l1 + (sun4u_r1 - sun4u_a1)], %o1 |
1260 | add %l1, (sun4u_a2 - sun4u_a1), %o0 |
1261 | call %l0 |
1262 | st %o1, [%o0 + (sun4u_i2 - sun4u_a2)] |
1263 | |
1264 | ld [%l1 + (sun4u_1 - sun4u_a1)], %o1 |
1265 | add %l1, (sun4u_a3 - sun4u_a1), %o0 |
1266 | call %l0 |
1267 | st %o1, [%o0 + (sun4u_i3 - sun4u_a3)] |
1268 | |
1269 | call %l0 |
1270 | add %l1, (sun4u_a4 - sun4u_a1), %o0 |
1271 | |
1272 | /* Not reached */ |
1273 | halt_me: |
1274 | ld [%g7 + 0x74], %o0 |
1275 | call %o0 ! Get us out of here... |
1276 | nop ! Apparently Solaris is better. |
1277 | |
1278 | /* Ok, now we continue in the .data/.text sections */ |
1279 | |
1280 | .data |
1281 | .align 4 |
1282 | |
1283 | /* |
1284 | * Fill up the prom vector, note in particular the kind first element, |
1285 | * no joke. I don't need all of them in here as the entire prom vector |
1286 | * gets initialized in c-code so all routines can use it. |
1287 | */ |
1288 | |
1289 | prom_vector_p: |
1290 | .word 0 |
1291 | |
1292 | /* We calculate the following at boot time, window fills/spills and trap entry |
1293 | * code uses these to keep track of the register windows. |
1294 | */ |
1295 | |
1296 | .align 4 |
1297 | .globl nwindows |
1298 | .globl nwindowsm1 |
1299 | nwindows: |
1300 | .word 8 |
1301 | nwindowsm1: |
1302 | .word 7 |
1303 | |
1304 | /* Boot time debugger vector value. We need this later on. */ |
1305 | |
1306 | .align 4 |
1307 | .globl linux_dbvec |
1308 | linux_dbvec: |
1309 | .word 0 |
1310 | .word 0 |
1311 | |
1312 | .align 8 |
1313 | |
1314 | .globl lvl14_save |
1315 | lvl14_save: |
1316 | .word 0 |
1317 | .word 0 |
1318 | .word 0 |
1319 | .word 0 |
1320 | .word t_irq14 |
1321 | |
1322 | .section ".fixup",#alloc,#execinstr |
1323 | .globl __ret_efault |
1324 | __ret_efault: |
1325 | ret |
1326 | restore %g0, -EFAULT, %o0 |
1327 |
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