Root/drivers/char/hw_random/n2-asm.S

1/* n2-asm.S: Niagara2 RNG hypervisor call assembler.
2 *
3 * Copyright (C) 2008 David S. Miller <davem@davemloft.net>
4 */
5#include <linux/linkage.h>
6#include <asm/hypervisor.h>
7#include "n2rng.h"
8
9    .text
10
11ENTRY(sun4v_rng_get_diag_ctl)
12    mov HV_FAST_RNG_GET_DIAG_CTL, %o5
13    ta HV_FAST_TRAP
14    retl
15     nop
16ENDPROC(sun4v_rng_get_diag_ctl)
17
18ENTRY(sun4v_rng_ctl_read_v1)
19    mov %o1, %o3
20    mov %o2, %o4
21    mov HV_FAST_RNG_CTL_READ, %o5
22    ta HV_FAST_TRAP
23    stx %o1, [%o3]
24    retl
25     stx %o2, [%o4]
26ENDPROC(sun4v_rng_ctl_read_v1)
27
28ENTRY(sun4v_rng_ctl_read_v2)
29    save %sp, -192, %sp
30    mov %i0, %o0
31    mov %i1, %o1
32    mov HV_FAST_RNG_CTL_READ, %o5
33    ta HV_FAST_TRAP
34    stx %o1, [%i2]
35    stx %o2, [%i3]
36    stx %o3, [%i4]
37    stx %o4, [%i5]
38    ret
39    restore %g0, %o0, %o0
40ENDPROC(sun4v_rng_ctl_read_v2)
41
42ENTRY(sun4v_rng_ctl_write_v1)
43    mov %o3, %o4
44    mov HV_FAST_RNG_CTL_WRITE, %o5
45    ta HV_FAST_TRAP
46    retl
47     stx %o1, [%o4]
48ENDPROC(sun4v_rng_ctl_write_v1)
49
50ENTRY(sun4v_rng_ctl_write_v2)
51    mov HV_FAST_RNG_CTL_WRITE, %o5
52    ta HV_FAST_TRAP
53    retl
54     nop
55ENDPROC(sun4v_rng_ctl_write_v2)
56
57ENTRY(sun4v_rng_data_read_diag_v1)
58    mov %o2, %o4
59    mov HV_FAST_RNG_DATA_READ_DIAG, %o5
60    ta HV_FAST_TRAP
61    retl
62     stx %o1, [%o4]
63ENDPROC(sun4v_rng_data_read_diag_v1)
64
65ENTRY(sun4v_rng_data_read_diag_v2)
66    mov %o3, %o4
67    mov HV_FAST_RNG_DATA_READ_DIAG, %o5
68    ta HV_FAST_TRAP
69    retl
70     stx %o1, [%o4]
71ENDPROC(sun4v_rng_data_read_diag_v2)
72
73ENTRY(sun4v_rng_data_read)
74    mov %o1, %o4
75    mov HV_FAST_RNG_DATA_READ, %o5
76    ta HV_FAST_TRAP
77    retl
78     stx %o1, [%o4]
79ENDPROC(sun4v_rng_data_read)
80

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