Assembly versions of commpage functions for Powerpc, by Peter Grehan.
bigcopy is still missing gettimeofday is implemented as a system call, whereas on Darwin, it reads the data from the commpage (the kernel updates it).
This commit is contained in:
manu
parent
06cb75fa32
commit
9ff70d0082
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@ -1,11 +1,11 @@
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/* $NetBSD: darwin_commpage_machdep.S,v 1.1 2004/07/03 22:17:18 manu Exp $ */
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/* $NetBSD: darwin_commpage_machdep.S,v 1.2 2004/07/06 14:11:49 manu Exp $ */
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/*
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* Copyright (c) 2004 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Emmanuel Dreyfus.
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* by Emmanuel Dreyfus and Peter Grehan.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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@ -38,12 +38,16 @@
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#include <machine/asm.h>
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#include <compat/mach/mach_syscall.h>
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#include <compat/darwin/darwin_syscall.h>
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/*
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* void bzero(void *src, size_t len);
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*/
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.globl _C_LABEL(darwin_commpage_bzero)
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_C_LABEL(darwin_commpage_bzero):
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cmplwi r4,0
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beqlr
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beqlr
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li r0,0
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mr r5,r4
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mr r4,r3
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@ -83,13 +87,16 @@ bzero7:
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bdnz+ bzero7
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bzero6:
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andi. r5,r5,3
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beqlr+
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beqlr+
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addi r4,r4,3
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b bzero8
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.globl _C_LABEL(darwin_commpage_bzero_size)
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_C_LABEL(darwin_commpage_bzero_size) = .-_C_LABEL(darwin_commpage_bzero)
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/*
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* mach_cproc_t *pthread_self(void);
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*/
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.globl _C_LABEL(darwin_commpage_pthread_self)
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_C_LABEL(darwin_commpage_pthread_self):
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li r0,32754 /* MACH_FASTTRAPS_SYS_cthread_self + MACH_FASTTRAPS */
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@ -98,16 +105,47 @@ _C_LABEL(darwin_commpage_pthread_self):
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.globl _C_LABEL(darwin_commpage_pthread_self_size)
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_C_LABEL(darwin_commpage_pthread_self_size) = .-_C_LABEL(darwin_commpage_pthread_self)
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/*
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* int gettimeofday(struct timeval *tv, struct timezone *tz);
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*/
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.globl _C_LABEL(darwin_commpage_gettimeofday)
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_C_LABEL(darwin_commpage_gettimeofday):
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li r0,DARWIN_SYS_gettimeofday
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sc
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blr /* Skipped on success */
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blr
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.globl _C_LABEL(darwin_commpage_gettimeofday_size)
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_C_LABEL(darwin_commpage_gettimeofday_size) = .-_C_LABEL(darwin_commpage_gettimeofday)
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/*
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* void bigcopy(void *ignored, void *src, size_t len, ..., void *dst);
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*
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* The ... does not mean vararg here. Here is the calling convention:
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* src => r4
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* len => r5
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* dst => r12
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*/
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.globl _C_LABEL(darwin_commpage_bigcopy)
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_C_LABEL(darwin_commpage_bigcopy):
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.long 0x0
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.globl _C_LABEL(darwin_commpage_bigcopy_size)
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_C_LABEL(darwin_commpage_bigcopy_size) = .-_C_LABEL(darwin_commpage_bigcopy)
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/*
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* void bcopy(void *src, void *dst, size_t len);
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*/
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.globl _C_LABEL(darwin_commpage_bcopy)
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_C_LABEL(darwin_commpage_bcopy):
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mr r6,r3 /* swap $1 and $2 */
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mr r3,r4
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mr r4,r6
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ba 0xffff87a0 /* Absolute branch to memcpy */
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.globl _C_LABEL(darwin_commpage_bcopy_size)
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_C_LABEL(darwin_commpage_bcopy_size) = .-_C_LABEL(darwin_commpage_bcopy)
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/*
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* void *memcpy(void *dst, void *src, size_t len);
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*/
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.globl _C_LABEL(darwin_commpage_memcpy)
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_C_LABEL(darwin_commpage_memcpy):
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subfic r0,r5,0
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@ -168,58 +206,135 @@ memcpy1:
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blr
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.globl _C_LABEL(darwin_commpage_memcpy_size)
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_C_LABEL(darwin_commpage_memcpy_size) = .-_C_LABEL(darwin_commpage_memcpy)
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.globl _C_LABEL(darwin_commpage_bigcopy_size)
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_C_LABEL(darwin_commpage_bigcopy_size) = .-_C_LABEL(darwin_commpage_bigcopy)
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.globl _C_LABEL(darwin_commpage_pthread_specific)
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_C_LABEL(darwin_commpage_pthread_specific):
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/*
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* int pthread_getspecific(pthread_key key);
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*/
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.globl _C_LABEL(darwin_commpage_pthread_getspecific)
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_C_LABEL(darwin_commpage_pthread_getspecific):
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rlwinm r5,r3,2,0,29
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li r0,32754 /* MACH_FASTTRAPS_SYS_cthread_self + MACH_FASTTRAPS */
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sc
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add r5,r5,r4
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lwzx r3,r3,r5
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blr
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.globl _C_LABEL(darwin_commpage_pthread_specific_size)
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_C_LABEL(darwin_commpage_pthread_specific_size) = .-_C_LABEL(darwin_commpage_pthread_specific)
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.globl _C_LABEL(darwin_commpage_pthread_getspecific_size)
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_C_LABEL(darwin_commpage_pthread_getspecific_size) = .-_C_LABEL(darwin_commpage_pthread_getspecific)
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/*
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* uint64_t mach_absolute_time(void)
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*/
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.globl _C_LABEL(darwin_commpage_mach_absolute_time)
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_C_LABEL(darwin_commpage_mach_absolute_time):
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.long 0x0
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1: mftbu r3
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mftb r4
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mftbu r5
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cmpw r3,r5
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bne- 1b
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blr
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.globl _C_LABEL(darwin_commpage_mach_absolute_time_size)
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_C_LABEL(darwin_commpage_mach_absolute_time_size) = .-_C_LABEL(darwin_commpage_mach_absolute_time)
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.globl _C_LABEL(darwin_commpage_spinlock_try)
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_C_LABEL(darwin_commpage_spinlock_try):
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.long 0x0
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.globl _C_LABEL(darwin_commpage_spinlock_try_size)
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_C_LABEL(darwin_commpage_spinlock_try_size) = .-_C_LABEL(darwin_commpage_spinlock_try)
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.globl _C_LABEL(darwin_commpage_spinlock_lock)
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_C_LABEL(darwin_commpage_spinlock_lock):
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.long 0x0
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.globl _C_LABEL(darwin_commpage_spinlock_lock_size)
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_C_LABEL(darwin_commpage_spinlock_lock_size) = .-_C_LABEL(darwin_commpage_spinlock_lock)
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.globl _C_LABEL(darwin_commpage_spinlock_unlock)
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_C_LABEL(darwin_commpage_spinlock_unlock):
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.long 0x0
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.globl _C_LABEL(darwin_commpage_spinlock_unlock_size)
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_C_LABEL(darwin_commpage_spinlock_unlock_size) = .-_C_LABEL(darwin_commpage_spinlock_unlock)
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/*
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* void sys_dcache_flush(char *addr, size_t len);
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*
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* XXX these routines are fine on G3/G4, but on a G5 a different
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* routine should be used that has a 128-byte cache size
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*/
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.globl _C_LABEL(darwin_commpage_sys_dcache_flush)
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_C_LABEL(darwin_commpage_sys_dcache_flush):
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.long 0x0
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1: dcbf 0,r3
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addi r3,r3,32 /* CACHELINESIZE */
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addic. r4,r4,-32 /* len -= CACHELINESIZE */
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bgt 1b
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blr
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.globl _C_LABEL(darwin_commpage_sys_dcache_flush_size)
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_C_LABEL(darwin_commpage_sys_dcache_flush_size) = .-_C_LABEL(darwin_commpage_sys_dcache_flush)
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/*
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* void sys_icache_invalidate(char *addr, size_t len)
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*/
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.globl _C_LABEL(darwin_commpage_sys_icache_invalidate)
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_C_LABEL(darwin_commpage_sys_icache_invalidate):
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.long 0x0
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1: icbi 0,r3
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addi r3,r3,32 /* CACHELINESIZE */
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addic. r4,r4,-32 /* len -= CACHELINESIZE */
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bgt 1b
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blr
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.globl _C_LABEL(darwin_commpage_sys_icache_invalidate_size)
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_C_LABEL(darwin_commpage_sys_icache_invalidate_size) = .-_C_LABEL(darwin_commpage_sys_icache_invalidate)
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/*
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* Helper definitions for spinlocks operations
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*/
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#define COMMPAGE_THREAD_SWITCH \
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li r3,0; /* THREAD_NULL */ \
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li r4,1; /* MACH_SWITCH_OPTION_DEPRESS */ \
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li r5,1; /* 1ms */ \
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li r0,-MACH_SYS_syscall_thread_switch; \
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sc;
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#define COMMPAGE_SPINLOCK \
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li r4,1; \
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1: lwarx r5,0,r3; \
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cmpwi r5,0; \
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bne- 1b; \
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stwcx. r4,0,r3; \
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bne- 1b; \
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isync;
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/*
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* int spinlock_try(int *p)
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*/
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.globl _C_LABEL(darwin_commpage_spinlock_try)
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_C_LABEL(darwin_commpage_spinlock_try):
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COMMPAGE_SPINLOCK
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li r3,0
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blr
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.globl _C_LABEL(darwin_commpage_spinlock_try_size)
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_C_LABEL(darwin_commpage_spinlock_try_size) = .-_C_LABEL(darwin_commpage_spinlock_try)
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/*
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* void spinlock_lock(int *p)
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*/
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.globl _C_LABEL(darwin_commpage_spinlock_lock)
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_C_LABEL(darwin_commpage_spinlock_lock):
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mr r6,r3 /* copy *p - r6/r7/r8 used for temps */
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li r7,1
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1: lwarx r8,0,r6
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cmpwi r8,0
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bne- 2f
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stwcx. r7,0,r6
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bne- 2f
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isync;
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blr
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2: COMMPAGE_THREAD_SWITCH
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ba 1b
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.globl _C_LABEL(darwin_commpage_spinlock_lock_size)
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_C_LABEL(darwin_commpage_spinlock_lock_size) = .-_C_LABEL(darwin_commpage_spinlock_lock)
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/*
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* void spinlock_unlock(int *p)
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*/
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.globl _C_LABEL(darwin_commpage_spinlock_unlock)
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_C_LABEL(darwin_commpage_spinlock_unlock):
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sync
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li r4,0
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stw r4,0(r3)
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blr
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.globl _C_LABEL(darwin_commpage_spinlock_unlock_size)
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_C_LABEL(darwin_commpage_spinlock_unlock_size) = .-_C_LABEL(darwin_commpage_spinlock_unlock)
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/*
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* int spinlock_relinquish(int *p)
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*/
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.globl _C_LABEL(darwin_commpage_spinlock_relinquish)
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_C_LABEL(darwin_commpage_spinlock_relinquish):
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.long 0x0
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mr r6,r3
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COMMPAGE_THREAD_SWITCH
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mr r3,r6
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COMMPAGE_SPINLOCK
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blr
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.globl _C_LABEL(darwin_commpage_spinlock_relinquish_size)
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_C_LABEL(darwin_commpage_spinlock_relinquish_size) = .-_C_LABEL(darwin_commpage_spinlock_relinquish)
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