| locks.S (e5451c8f8330e03ad3cfa16048b4daf961af434f) | locks.S (d3867f0483103b8ff7edfdea3ef1981c03d96891) |
|---|---|
| 1/* 2 * locks.S: SMP low-level lock primitives on Sparc. 3 * 4 * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu) 5 * Copyright (C) 1998 Anton Blanchard (anton@progsoc.uts.edu.au) 6 * Copyright (C) 1998 Jakub Jelinek (jj@ultra.linux.cz) 7 */ 8 9#include <asm/ptrace.h> 10#include <asm/psr.h> 11#include <asm/smp.h> 12#include <asm/spinlock.h> | 1/* 2 * locks.S: SMP low-level lock primitives on Sparc. 3 * 4 * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu) 5 * Copyright (C) 1998 Anton Blanchard (anton@progsoc.uts.edu.au) 6 * Copyright (C) 1998 Jakub Jelinek (jj@ultra.linux.cz) 7 */ 8 9#include <asm/ptrace.h> 10#include <asm/psr.h> 11#include <asm/smp.h> 12#include <asm/spinlock.h> |
| 13#include <asm/export.h> |
|
| 13 14 .text 15 .align 4 16 17 /* Read/writer locks, as usual this is overly clever to make it 18 * as fast as possible. 19 */ 20 --- 22 unchanged lines hidden (view full) --- 43___rw_write_enter_spin_on_wlock: 44 orcc %g2, 0x0, %g0 45 be,a ___rw_write_enter 46 ldstub [%g1 + 3], %g2 47 b ___rw_write_enter_spin_on_wlock 48 ld [%g1], %g2 49 50 .globl ___rw_read_enter | 14 15 .text 16 .align 4 17 18 /* Read/writer locks, as usual this is overly clever to make it 19 * as fast as possible. 20 */ 21 --- 22 unchanged lines hidden (view full) --- 44___rw_write_enter_spin_on_wlock: 45 orcc %g2, 0x0, %g0 46 be,a ___rw_write_enter 47 ldstub [%g1 + 3], %g2 48 b ___rw_write_enter_spin_on_wlock 49 ld [%g1], %g2 50 51 .globl ___rw_read_enter |
| 52EXPORT_SYMBOL(___rw_read_enter) |
|
| 51___rw_read_enter: 52 orcc %g2, 0x0, %g0 53 bne,a ___rw_read_enter_spin_on_wlock 54 ldub [%g1 + 3], %g2 55 ld [%g1], %g2 56 add %g2, 1, %g2 57 st %g2, [%g1] 58 retl 59 mov %g4, %o7 60 61 .globl ___rw_read_exit | 53___rw_read_enter: 54 orcc %g2, 0x0, %g0 55 bne,a ___rw_read_enter_spin_on_wlock 56 ldub [%g1 + 3], %g2 57 ld [%g1], %g2 58 add %g2, 1, %g2 59 st %g2, [%g1] 60 retl 61 mov %g4, %o7 62 63 .globl ___rw_read_exit |
| 64EXPORT_SYMBOL(___rw_read_exit) |
|
| 62___rw_read_exit: 63 orcc %g2, 0x0, %g0 64 bne,a ___rw_read_exit_spin_on_wlock 65 ldub [%g1 + 3], %g2 66 ld [%g1], %g2 67 sub %g2, 0x1ff, %g2 68 st %g2, [%g1] 69 retl 70 mov %g4, %o7 71 72 .globl ___rw_read_try | 65___rw_read_exit: 66 orcc %g2, 0x0, %g0 67 bne,a ___rw_read_exit_spin_on_wlock 68 ldub [%g1 + 3], %g2 69 ld [%g1], %g2 70 sub %g2, 0x1ff, %g2 71 st %g2, [%g1] 72 retl 73 mov %g4, %o7 74 75 .globl ___rw_read_try |
| 76EXPORT_SYMBOL(___rw_read_try) |
|
| 73___rw_read_try: 74 orcc %g2, 0x0, %g0 75 bne ___rw_read_try_spin_on_wlock 76 ld [%g1], %g2 77 add %g2, 1, %g2 78 st %g2, [%g1] 79 set 1, %o1 80 retl 81 mov %g4, %o7 82 83 .globl ___rw_write_enter | 77___rw_read_try: 78 orcc %g2, 0x0, %g0 79 bne ___rw_read_try_spin_on_wlock 80 ld [%g1], %g2 81 add %g2, 1, %g2 82 st %g2, [%g1] 83 set 1, %o1 84 retl 85 mov %g4, %o7 86 87 .globl ___rw_write_enter |
| 88EXPORT_SYMBOL(___rw_write_enter) |
|
| 84___rw_write_enter: 85 orcc %g2, 0x0, %g0 86 bne ___rw_write_enter_spin_on_wlock 87 ld [%g1], %g2 88 andncc %g2, 0xff, %g0 89 bne,a ___rw_write_enter_spin_on_wlock 90 stb %g0, [%g1 + 3] 91 retl 92 mov %g4, %o7 | 89___rw_write_enter: 90 orcc %g2, 0x0, %g0 91 bne ___rw_write_enter_spin_on_wlock 92 ld [%g1], %g2 93 andncc %g2, 0xff, %g0 94 bne,a ___rw_write_enter_spin_on_wlock 95 stb %g0, [%g1 + 3] 96 retl 97 mov %g4, %o7 |