1 /* SPDX-License-Identifier: GPL-2.0-only */ <<
2 .align 32 1 .align 32
3 .globl __flushw_user 2 .globl __flushw_user
4 .type __flushw_user,#function 3 .type __flushw_user,#function
5 __flushw_user: 4 __flushw_user:
6 rdpr %otherwin, %g1 5 rdpr %otherwin, %g1
7 brz,pn %g1, 2f 6 brz,pn %g1, 2f
8 clr %g2 7 clr %g2
9 1: save %sp, -128, %sp 8 1: save %sp, -128, %sp
10 rdpr %otherwin, %g1 9 rdpr %otherwin, %g1
11 brnz,pt %g1, 1b 10 brnz,pt %g1, 1b
12 add %g2, 1, %g2 11 add %g2, 1, %g2
13 1: sub %g2, 1, %g2 12 1: sub %g2, 1, %g2
14 brnz,pt %g2, 1b 13 brnz,pt %g2, 1b
15 restore %g0, %g0, %g0 14 restore %g0, %g0, %g0
16 2: retl 15 2: retl
17 nop 16 nop
18 .size __flushw_user,.-__flushw_user 17 .size __flushw_user,.-__flushw_user
19 EXPORT_SYMBOL(__flushw_user) 18 EXPORT_SYMBOL(__flushw_user)
20 19
21 /* Flush %fp and %i7 to the stack for 20 /* Flush %fp and %i7 to the stack for all register
22 * windows active inside of the cpu. 21 * windows active inside of the cpu. This allows
23 * show_stack_trace() to avoid using a 22 * show_stack_trace() to avoid using an expensive
24 * 'flushw'. 23 * 'flushw'.
25 */ 24 */
26 .globl stack_trace_flush 25 .globl stack_trace_flush
27 .type stack_trace_flush,#fun 26 .type stack_trace_flush,#function
28 stack_trace_flush: 27 stack_trace_flush:
29 rdpr %pstate, %o0 28 rdpr %pstate, %o0
30 wrpr %o0, PSTATE_IE, %pstat 29 wrpr %o0, PSTATE_IE, %pstate
31 30
32 rdpr %cwp, %g1 31 rdpr %cwp, %g1
33 rdpr %canrestore, %g2 32 rdpr %canrestore, %g2
34 sub %g1, 1, %g3 33 sub %g1, 1, %g3
35 34
36 1: brz,pn %g2, 2f 35 1: brz,pn %g2, 2f
37 sub %g2, 1, %g2 36 sub %g2, 1, %g2
38 wrpr %g3, %cwp 37 wrpr %g3, %cwp
39 stx %fp, [%sp + STACK_BIAS 38 stx %fp, [%sp + STACK_BIAS + RW_V9_I6]
40 stx %i7, [%sp + STACK_BIAS 39 stx %i7, [%sp + STACK_BIAS + RW_V9_I7]
41 ba,pt %xcc, 1b 40 ba,pt %xcc, 1b
42 sub %g3, 1, %g3 41 sub %g3, 1, %g3
43 42
44 2: wrpr %g1, %cwp 43 2: wrpr %g1, %cwp
45 wrpr %o0, %pstate 44 wrpr %o0, %pstate
46 45
47 retl 46 retl
48 nop 47 nop
49 .size stack_trace_flush,.-st 48 .size stack_trace_flush,.-stack_trace_flush
50 49
51 #ifdef CONFIG_SMP 50 #ifdef CONFIG_SMP
52 .globl hard_smp_processor_id 51 .globl hard_smp_processor_id
53 .type hard_smp_processor_id, 52 .type hard_smp_processor_id,#function
54 hard_smp_processor_id: 53 hard_smp_processor_id:
55 #endif 54 #endif
56 .globl real_hard_smp_processo 55 .globl real_hard_smp_processor_id
57 .type real_hard_smp_processo 56 .type real_hard_smp_processor_id,#function
58 real_hard_smp_processor_id: 57 real_hard_smp_processor_id:
59 __GET_CPUID(%o0) 58 __GET_CPUID(%o0)
60 retl 59 retl
61 nop 60 nop
62 #ifdef CONFIG_SMP 61 #ifdef CONFIG_SMP
63 .size hard_smp_processor_id, 62 .size hard_smp_processor_id,.-hard_smp_processor_id
64 #endif 63 #endif
65 .size real_hard_smp_processo 64 .size real_hard_smp_processor_id,.-real_hard_smp_processor_id
66 EXPORT_SYMBOL_GPL(real_hard_smp_processor_id) 65 EXPORT_SYMBOL_GPL(real_hard_smp_processor_id)
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