diff options
author | cognet <cognet@FreeBSD.org> | 2004-11-05 23:49:21 +0000 |
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committer | cognet <cognet@FreeBSD.org> | 2004-11-05 23:49:21 +0000 |
commit | 2310011fe20080aefb1102c2a8a89f0422c250d6 (patch) | |
tree | 9c0086acab37a67b3c996c2f012ce6dc63501ea2 /lib/libkse/arch | |
parent | 78386f3ec2096601ba522a0da7bba3a2fdeb262f (diff) | |
download | FreeBSD-src-2310011fe20080aefb1102c2a8a89f0422c250d6.zip FreeBSD-src-2310011fe20080aefb1102c2a8a89f0422c250d6.tar.gz |
Partial support of KSE for arm.
Diffstat (limited to 'lib/libkse/arch')
-rw-r--r-- | lib/libkse/arch/arm/arm/context.S | 21 | ||||
-rw-r--r-- | lib/libkse/arch/arm/arm/pthread_md.c | 15 | ||||
-rw-r--r-- | lib/libkse/arch/arm/include/atomic_ops.h | 23 | ||||
-rw-r--r-- | lib/libkse/arch/arm/include/pthread_md.h | 66 |
4 files changed, 66 insertions, 59 deletions
diff --git a/lib/libkse/arch/arm/arm/context.S b/lib/libkse/arch/arm/arm/context.S index f5e0113..addb399 100644 --- a/lib/libkse/arch/arm/arm/context.S +++ b/lib/libkse/arch/arm/arm/context.S @@ -43,18 +43,9 @@ ENTRY(__thr_setcontext) cmp r0, #0 moveq r0, #-1 moveq pc, lr - add ip, r0, #8 - ldmia ip, {r2-r12} cmp r2, #0 - str r1, [r2] - add ip, r0, #4 - str ip, [r1] /* Restore r1. */ - add ip, r0, #64 - msr cpsr, ip - add ip, r0, #52 - mov r0, #0 /* Return 0. */ - ldr sp, [ip] /* Restore stack pointer. */ - mov pc, lr /* Return. */ + strne r1, [r2] + ldmia r0, {r0-r15} /* XXX: FP bits ? */ /* @@ -72,10 +63,14 @@ ENTRY(__thr_getcontext) moveq r0, #-1 moveq pc, lr stmia r0, {r0-r13} + mov r1, #1 + str r1, [r0] /* Return 1 from setcontext */ + str lr, [r0, #(15 * 4)] /* PC */ + mrs r1, cpsr + str r1, [r0, #(16 * 4)] /* CPSR */ mov r0, #0 /* Return 0. */ mov pc, lr ENTRY(_arm_enter_uts) - add r4, r2, r3 /* Stack addr + size. */ - mov lr, pc + add sp, r2, r3 /* Stack addr + size. */ mov pc, r1 diff --git a/lib/libkse/arch/arm/arm/pthread_md.c b/lib/libkse/arch/arm/arm/pthread_md.c index d6bf95d..f8eda42 100644 --- a/lib/libkse/arch/arm/arm/pthread_md.c +++ b/lib/libkse/arch/arm/arm/pthread_md.c @@ -39,19 +39,15 @@ __FBSDID("$FreeBSD$"); #include "pthread_md.h" +struct arm_tp *_tp = NULL; + struct tcb * _tcb_ctor(struct pthread *thread, int initial) { struct tcb *tcb; - void *addr; - addr = malloc(sizeof(struct tcb) + 63); - if (addr == NULL) - tcb = NULL; - else { - tcb = (struct tcb *)(((uintptr_t)(addr) + 63) & ~63); + if ((tcb = malloc(sizeof(struct tcb)))) { bzero(tcb, sizeof(struct tcb)); - tcb->tcb_addr = addr; tcb->tcb_thread = thread; /* XXX - Allocate tdv/tls */ } @@ -61,11 +57,8 @@ _tcb_ctor(struct pthread *thread, int initial) void _tcb_dtor(struct tcb *tcb) { - void *addr; - addr = tcb->tcb_addr; - tcb->tcb_addr = NULL; - free(addr); + free(tcb); } struct kcb * diff --git a/lib/libkse/arch/arm/include/atomic_ops.h b/lib/libkse/arch/arm/include/atomic_ops.h index e36a6bf..1ee5d80 100644 --- a/lib/libkse/arch/arm/include/atomic_ops.h +++ b/lib/libkse/arch/arm/include/atomic_ops.h @@ -29,6 +29,9 @@ #ifndef _ATOMIC_OPS_H_ #define _ATOMIC_OPS_H_ +#include <machine/atomic.h> +#include "thr_private.h" + /* * Atomic swap: * Atomic (tmp = *dst, *dst = val), then *res = tmp @@ -38,9 +41,7 @@ static inline void atomic_swap32(intptr_t *dst, intptr_t val, intptr_t *res) { - __asm __volatile( - "swp %2, %2, [%1]; mov %2, %0" - : "=r" (*res) : "r" (dst), "r" (val) : "cc"); + *res = __swp(val, dst); } #define atomic_swap_ptr(d, v, r) \ @@ -49,3 +50,19 @@ atomic_swap32(intptr_t *dst, intptr_t val, intptr_t *res) #define atomic_swap_int(d, v, r) \ atomic_swap32((intptr_t *)d, (intptr_t)v, (intptr_t *)r) #endif + +static inline u_int32_t +atomic_cmpset_32(volatile u_int32_t *p, u_int32_t cmpval, u_int32_t newval) +{ + kse_critical_t crit = _kse_critical_enter(); + int ret; + + if (*p == cmpval) { + *p = newval; + ret = 1; + } else + ret = 0; + _kse_critical_leave(crit); + return (ret); +} + diff --git a/lib/libkse/arch/arm/include/pthread_md.h b/lib/libkse/arch/arm/include/pthread_md.h index 5fa0a85..b9ac871 100644 --- a/lib/libkse/arch/arm/include/pthread_md.h +++ b/lib/libkse/arch/arm/include/pthread_md.h @@ -64,19 +64,15 @@ struct tdv; /* We don't know what this is yet? */ */ struct arm_tp { struct tdv *tp_tdv; /* dynamic TLS */ - uint32_t _reserved_; - long double tp_tls[0]; /* static TLS */ }; struct tcb { struct pthread *tcb_thread; - void *tcb_addr; /* allocated tcb address */ struct kcb *tcb_curkcb; uint32_t tcb_isfake; - uint32_t tcb_spare[4]; struct kse_thr_mailbox tcb_tmbx; /* needs 32-byte alignment */ struct arm_tp tcb_tp; -} __aligned(32); +}; struct kcb { struct kse_mailbox kcb_kmbx; @@ -85,7 +81,7 @@ struct kcb { struct kse *kcb_kse; }; -register struct arm_tp *_tp __asm("%r6"); +extern struct arm_tp *_tp; #define _tcb ((struct tcb*)((char*)(_tp) - offsetof(struct tcb, tcb_tp))) @@ -97,12 +93,21 @@ void _tcb_dtor(struct tcb *); struct kcb *_kcb_ctor(struct kse *kse); void _kcb_dtor(struct kcb *); +static __inline uint32_t +__kcb_swp(uint32_t val, void *ptr) +{ + + __asm __volatile("swp %0, %1, [%2]" + : "=r" (val) : "r" (val) , "r" (ptr) : "memory"); + return (val); +} + /* Called from the KSE to set its private data. */ static __inline void _kcb_set(struct kcb *kcb) { /* There is no thread yet; use the fake tcb. */ - _tp = &kcb->kcb_faketcb.tcb_tp; + __kcb_swp((uint32_t)&kcb->kcb_faketcb.tcb_tp, &_tp); } /* @@ -126,30 +131,21 @@ static __inline struct kse_thr_mailbox * _kcb_critical_enter(void) { struct kse_thr_mailbox *crit; - uint32_t flags; - if (_tcb->tcb_isfake != 0) { - /* - * We already are in a critical region since - * there is no current thread. - */ - crit = NULL; - } else { - flags = _tcb->tcb_tmbx.tm_flags; - _tcb->tcb_tmbx.tm_flags |= TMF_NOUPCALL; - crit = _tcb->tcb_curkcb->kcb_kmbx.km_curthread; - _tcb->tcb_curkcb->kcb_kmbx.km_curthread = NULL; - _tcb->tcb_tmbx.tm_flags = flags; - } + if (_tcb->tcb_isfake) + return (NULL); + crit = (struct kse_thr_mailbox *)__kcb_swp((uint32_t)NULL, + &_tcb->tcb_curkcb->kcb_kmbx.km_curthread); return (crit); } static __inline void _kcb_critical_leave(struct kse_thr_mailbox *crit) { - /* No need to do anything if this is a fake tcb. */ + if (_tcb->tcb_isfake == 0) - _tcb->tcb_curkcb->kcb_kmbx.km_curthread = crit; + __kcb_swp((uint32_t)crit, + &_tcb->tcb_curkcb->kcb_kmbx.km_curthread); } static __inline int @@ -158,6 +154,7 @@ _kcb_in_critical(void) uint32_t flags; int ret; + return (_tcb->tcb_curkcb->kcb_kmbx.km_curthread == NULL); if (_tcb->tcb_isfake != 0) { /* * We are in a critical region since there is no @@ -176,11 +173,11 @@ _kcb_in_critical(void) static __inline void _tcb_set(struct kcb *kcb, struct tcb *tcb) { - if (tcb == NULL) + if (tcb == NULL) tcb = &kcb->kcb_faketcb; + __kcb_swp((uint32_t)&tcb->tcb_tp, &_tp); kcb->kcb_curtcb = tcb; tcb->tcb_curkcb = kcb; - _tp = &tcb->tcb_tp; } static __inline struct tcb * @@ -206,22 +203,25 @@ _get_curkse(void) return (_tcb->tcb_curkcb->kcb_kse); } -void _arm_enter_uts(kse_func_t uts, struct kse_mailbox *km, void *stack, +void _arm_enter_uts(struct kse_mailbox *km, kse_func_t uts, void *stack, size_t stacksz); static __inline int _thread_enter_uts(struct tcb *tcb, struct kcb *kcb) { - if (_thr_getcontext(&tcb->tcb_tmbx.tm_context.uc_mcontext) == 0) { - /* Make the fake tcb the current thread. */ + int ret; + + if ((ret = _thr_getcontext(&tcb->tcb_tmbx.tm_context.uc_mcontext)) + == 0) { kcb->kcb_curtcb = &kcb->kcb_faketcb; - _tp = &kcb->kcb_faketcb.tcb_tp; - _arm_enter_uts(kcb->kcb_kmbx.km_func, &kcb->kcb_kmbx, + __kcb_swp((int)&kcb->kcb_faketcb.tcb_tp, &_tp); + _arm_enter_uts(&kcb->kcb_kmbx, kcb->kcb_kmbx.km_func, kcb->kcb_kmbx.km_stack.ss_sp, kcb->kcb_kmbx.km_stack.ss_size); /* We should not reach here. */ return (-1); - } + } else if (ret < 0) + return (-1); return (0); } @@ -231,9 +231,11 @@ _thread_switch(struct kcb *kcb, struct tcb *tcb, int setmbox) extern int _libkse_debug; mcontext_t *mc; + if (!tcb || !kcb) + return (-1); _tcb_set(kcb, tcb); mc = &tcb->tcb_tmbx.tm_context.uc_mcontext; - if (_libkse_debug == 0) { + if (0 && _libkse_debug == 0) { tcb->tcb_tmbx.tm_lwp = kcb->kcb_kmbx.km_lwp; if (setmbox) _thr_setcontext(mc, (intptr_t)&tcb->tcb_tmbx, |