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Fix semantic problems with commpage functions, by Wolfgang Solfrank

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This commit is contained in:
manu 2004-07-08 13:24:39 +00:00
parent daf173e8a5
commit 99b82f59fb
1 changed files with 64 additions and 60 deletions
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124
sys/arch/powerpc/powerpc/darwin_commpage_machdep.S
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@ -1,11 +1,11 @@
/* $NetBSD: darwin_commpage_machdep.S,v 1.3 2004/07/08 07:36:25 manu Exp $ */
/* $NetBSD: darwin_commpage_machdep.S,v 1.4 2004/07/08 13:24:39 manu Exp $ */
/*
* Copyright (c) 2004 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Emmanuel Dreyfus and Peter Grehan.
* by Emmanuel Dreyfus, Peter Grehan, and Wolfgang Solfrank.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
@ -41,6 +41,9 @@
#include <compat/mach/mach_syscall.h>
#include <compat/darwin/darwin_syscall.h>
#include <compat/mach/arch/powerpc/fasttraps/mach_fasttraps_syscall.h>
#define MACH_FASTTRAPS 0x00007ff0 /* should be in xxx.h XXX */
/*
* void bzero(void *src, size_t len);
*/
@ -49,46 +52,42 @@ _C_LABEL(darwin_commpage_bzero):
cmplwi r4,0
beqlr
li r0,0
mr r5,r4
mr r4,r3
cmplwi r5,6
cmplwi r4,6
bgt- bzero1
addi r4,r4,-1
addi r3,r3,-1
bzero8:
mtctr r5
mtctr r4
bzero2:
stbu r0,1(r4)
stbu r0,1(r3)
bdnz+ bzero2
blr
bzero1:
rlwimi r0,r0,8,16,23
rlwimi r0,r0,16,0,15
andi. r6,r4,3
andi. r5,r3,3
beq+ bzero3
andi. r6,r4,1
andi. r5,r3,1
beq- bzero5
stb r0,0(r4)
addi r4,r4,1
addi r5,r5,-1
andi. r6,r4,2
stb r0,0(r3)
addi r3,r3,1
addi r4,r4,-1
andi. r5,r3,2
beq- bzero3
bzero5:
sth r0,0(r4)
addi r4,r4,2
addi r5,r5,-2
sth r0,0(r3)
addi r3,r3,2
addi r4,r4,-2
bzero3:
cmplwi r5,4
cmplwi r4,4
blt- bzero6
rlwinm r6,r5,30,2,31
mtctr r6
addi r4,r4,-4
rlwinm r5,r4,30,2,31
mtctr r5
addi r3,r3,-4
bzero7:
stwu r0,4(r4)
stwu r0,4(r3)
bdnz+ bzero7
bzero6:
andi. r5,r5,3
andi. r4,r4,3
beqlr+
addi r4,r4,3
addi r3,r3,3
b bzero8
.globl _C_LABEL(darwin_commpage_bzero_size)
_C_LABEL(darwin_commpage_bzero_size) = .-_C_LABEL(darwin_commpage_bzero)
@ -99,7 +98,7 @@ _C_LABEL(darwin_commpage_bzero_size) = .-_C_LABEL(darwin_commpage_bzero)
*/
.globl _C_LABEL(darwin_commpage_pthread_self)
_C_LABEL(darwin_commpage_pthread_self):
li r0,32754 /* MACH_FASTTRAPS_SYS_cthread_self + MACH_FASTTRAPS */
li r0,MACH_FASTTRAPS_SYS_cthread_self+MACH_FASTTRAPS
sc
blr
.globl _C_LABEL(darwin_commpage_pthread_self_size)
@ -214,7 +213,7 @@ _C_LABEL(darwin_commpage_memcpy_size) = .-_C_LABEL(darwin_commpage_memcpy)
.globl _C_LABEL(darwin_commpage_pthread_getspecific)
_C_LABEL(darwin_commpage_pthread_getspecific):
rlwinm r5,r3,2,0,29
li r0,32754 /* MACH_FASTTRAPS_SYS_cthread_self + MACH_FASTTRAPS */
li r0,MACH_FASTTRAPS_SYS_cthread_self+MACH_FASTTRAPS
sc
add r5,r5,r4
lwzx r3,r3,r5
@ -248,6 +247,7 @@ _C_LABEL(darwin_commpage_sys_dcache_flush):
addi r3,r3,32 /* CACHELINESIZE */
addic. r4,r4,-32 /* len -= CACHELINESIZE */
bgt 1b
sync
blr
.globl _C_LABEL(darwin_commpage_sys_dcache_flush_size)
_C_LABEL(darwin_commpage_sys_dcache_flush_size) = .-_C_LABEL(darwin_commpage_sys_dcache_flush)
@ -257,40 +257,39 @@ _C_LABEL(darwin_commpage_sys_dcache_flush_size) = .-_C_LABEL(darwin_commpage_sys
*/
.globl _C_LABEL(darwin_commpage_sys_icache_invalidate)
_C_LABEL(darwin_commpage_sys_icache_invalidate):
1: icbi 0,r3
addi r3,r3,32 /* CACHELINESIZE */
addic. r4,r4,-32 /* len -= CACHELINESIZE */
mr r5,r3
mr r6,r4
mflr r7
bla 0xffff84e0 /* Absolute branch to dcache_flush */
mtlr r7
1: icbi 0,r5
addi r5,r5,32 /* CACHELINESIZE */
addic. r6,r6,-32 /* len -= CACHELINESIZE */
bgt 1b
isync
blr
.globl _C_LABEL(darwin_commpage_sys_icache_invalidate_size)
_C_LABEL(darwin_commpage_sys_icache_invalidate_size) = .-_C_LABEL(darwin_commpage_sys_icache_invalidate)
/*
* Helper definitions for spinlocks operations
*/
#define COMMPAGE_THREAD_SWITCH \
li r3,0; /* THREAD_NULL */ \
li r4,1; /* MACH_SWITCH_OPTION_DEPRESS */ \
li r5,1; /* 1ms */ \
li r0,-MACH_SYS_syscall_thread_switch; \
sc;
#define COMMPAGE_SPINLOCK \
li r4,1; \
1: lwarx r5,0,r3; \
cmpwi r5,0; \
bne- 1b; \
stwcx. r4,0,r3; \
bne- 1b; \
isync;
/*
* int spinlock_try(int *p)
*/
.globl _C_LABEL(darwin_commpage_spinlock_try)
_C_LABEL(darwin_commpage_spinlock_try):
COMMPAGE_SPINLOCK
li r3,0
li r4,1
lwarx r5,0,r3
cmpwi r5,0
bne- 2f
/*
* OSX seems to store the address of the lock here. i.e. the equivalent of
* stwcx. r3,0,r3 !!!
*/
stwcx. r4,0,r3
bne- 2f
mr r3,r4
isync
blr
2: li r3,0
blr
.globl _C_LABEL(darwin_commpage_spinlock_try_size)
_C_LABEL(darwin_commpage_spinlock_try_size) = .-_C_LABEL(darwin_commpage_spinlock_try)
@ -304,13 +303,15 @@ _C_LABEL(darwin_commpage_spinlock_lock):
li r7,1
1: lwarx r8,0,r6
cmpwi r8,0
bne- 2f
bnea- 0xffff85c0 /* Absolute branch to spinlock_relinquish */
/*
* OSX seems to store the address of the lock here. i.e. the equivalent of
* stwcx. r6,0,r3 !!!
*/
stwcx. r7,0,r6
bne- 2f
isync;
bnea- 0xffff85c0 /* Absolute branch to spinlock_relinquish */
isync
blr
2: COMMPAGE_THREAD_SWITCH
ba 1b
.globl _C_LABEL(darwin_commpage_spinlock_lock_size)
_C_LABEL(darwin_commpage_spinlock_lock_size) = .-_C_LABEL(darwin_commpage_spinlock_lock)
@ -332,9 +333,12 @@ _C_LABEL(darwin_commpage_spinlock_unlock_size) = .-_C_LABEL(darwin_commpage_spin
.globl _C_LABEL(darwin_commpage_spinlock_relinquish)
_C_LABEL(darwin_commpage_spinlock_relinquish):
mr r6,r3
COMMPAGE_THREAD_SWITCH
li r3,0 /* THREAD_NULL */
li r4,1 /* MACH_SWITCH_OPTION_DEPRESS */
li r5,1 /* 1ms */
li r0,-MACH_SYS_syscall_thread_switch
sc
mr r3,r6
COMMPAGE_SPINLOCK
blr
ba 0xffff8260 /* Absolute branch to spin_lock */
.globl _C_LABEL(darwin_commpage_spinlock_relinquish_size)
_C_LABEL(darwin_commpage_spinlock_relinquish_size) = .-_C_LABEL(darwin_commpage_spinlock_relinquish)