1/* SPDX-License-Identifier: GPL-2.0 */
2/* n2-asm.S: Niagara2 RNG hypervisor call assembler.
3 *
4 * Copyright (C) 2008 David S. Miller <davem@davemloft.net>
5 */
6#include <linux/linkage.h>
7#include <asm/hypervisor.h>
8#include "n2rng.h"
9
10 .text
11
12ENTRY(sun4v_rng_get_diag_ctl)
13 mov HV_FAST_RNG_GET_DIAG_CTL, %o5
14 ta HV_FAST_TRAP
15 retl
16 nop
17ENDPROC(sun4v_rng_get_diag_ctl)
18
19ENTRY(sun4v_rng_ctl_read_v1)
20 mov %o1, %o3
21 mov %o2, %o4
22 mov HV_FAST_RNG_CTL_READ, %o5
23 ta HV_FAST_TRAP
24 stx %o1, [%o3]
25 retl
26 stx %o2, [%o4]
27ENDPROC(sun4v_rng_ctl_read_v1)
28
29ENTRY(sun4v_rng_ctl_read_v2)
30 save %sp, -192, %sp
31 mov %i0, %o0
32 mov %i1, %o1
33 mov HV_FAST_RNG_CTL_READ, %o5
34 ta HV_FAST_TRAP
35 stx %o1, [%i2]
36 stx %o2, [%i3]
37 stx %o3, [%i4]
38 stx %o4, [%i5]
39 ret
40 restore %g0, %o0, %o0
41ENDPROC(sun4v_rng_ctl_read_v2)
42
43ENTRY(sun4v_rng_ctl_write_v1)
44 mov %o3, %o4
45 mov HV_FAST_RNG_CTL_WRITE, %o5
46 ta HV_FAST_TRAP
47 retl
48 stx %o1, [%o4]
49ENDPROC(sun4v_rng_ctl_write_v1)
50
51ENTRY(sun4v_rng_ctl_write_v2)
52 mov HV_FAST_RNG_CTL_WRITE, %o5
53 ta HV_FAST_TRAP
54 retl
55 nop
56ENDPROC(sun4v_rng_ctl_write_v2)
57
58ENTRY(sun4v_rng_data_read_diag_v1)
59 mov %o2, %o4
60 mov HV_FAST_RNG_DATA_READ_DIAG, %o5
61 ta HV_FAST_TRAP
62 retl
63 stx %o1, [%o4]
64ENDPROC(sun4v_rng_data_read_diag_v1)
65
66ENTRY(sun4v_rng_data_read_diag_v2)
67 mov %o3, %o4
68 mov HV_FAST_RNG_DATA_READ_DIAG, %o5
69 ta HV_FAST_TRAP
70 retl
71 stx %o1, [%o4]
72ENDPROC(sun4v_rng_data_read_diag_v2)
73
74ENTRY(sun4v_rng_data_read)
75 mov %o1, %o4
76 mov HV_FAST_RNG_DATA_READ, %o5
77 ta HV_FAST_TRAP
78 retl
79 stx %o1, [%o4]
80ENDPROC(sun4v_rng_data_read)
81

source code of linux/drivers/char/hw_random/n2-asm.S