diff options
Diffstat (limited to 'lib/libkse/arch/sparc64/include/pthread_md.h')
| -rw-r--r-- | lib/libkse/arch/sparc64/include/pthread_md.h | 243 |
1 files changed, 243 insertions, 0 deletions
diff --git a/lib/libkse/arch/sparc64/include/pthread_md.h b/lib/libkse/arch/sparc64/include/pthread_md.h new file mode 100644 index 0000000..17ebc3b --- /dev/null +++ b/lib/libkse/arch/sparc64/include/pthread_md.h @@ -0,0 +1,243 @@ +/*- + * Copyright (c) 2003 Jake Burkholder <jake@freebsd.org>. + * Copyright (c) 2003 Marcel Moolenaar + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * $FreeBSD$ + */ + +/* + * Machine-dependent thread prototypes/definitions for the thread kernel. + */ +#ifndef _PTHREAD_MD_H_ +#define _PTHREAD_MD_H_ + +#include <sys/kse.h> +#include <stddef.h> +#include <ucontext.h> + +#define KSE_STACKSIZE 16384 + +int _thr_setcontext(mcontext_t *, intptr_t, intptr_t *); +int _thr_getcontext(mcontext_t *); + +#define THR_GETCONTEXT(ucp) _thr_getcontext(&(ucp)->uc_mcontext) +#define THR_SETCONTEXT(ucp) _thr_setcontext(&(ucp)->uc_mcontext, 0, NULL) + +#define PER_THREAD + +struct kcb; +struct kse; +struct pthread; +struct tcb; +struct tdv; /* We don't know what this is yet? */ + + +/* + * %g6 points to one of these. We define the static TLS as an array + * of long double to enforce 16-byte alignment of the TLS memory. + * + * XXX - Both static and dynamic allocation of any of these structures + * will result in a valid, well-aligned thread pointer??? + */ +struct sparc64_tp { + struct tdv *tp_tdv; /* dynamic TLS */ + uint64_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; + uint64_t tcb_isfake; + uint64_t tcb_spare[4]; + struct kse_thr_mailbox tcb_tmbx; /* needs 64-byte alignment */ + struct sparc64_tp tcb_tp; +} __aligned(64); + +struct kcb { + struct kse_mailbox kcb_kmbx; + struct tcb kcb_faketcb; + struct tcb *kcb_curtcb; + struct kse *kcb_kse; +}; + +register struct sparc64_tp *_tp __asm("%g6"); + +#define _tcb ((struct tcb*)((char*)(_tp) - offsetof(struct tcb, tcb_tp))) + +/* + * The kcb and tcb constructors. + */ +struct tcb *_tcb_ctor(struct pthread *); +void _tcb_dtor(struct tcb *); +struct kcb *_kcb_ctor(struct kse *kse); +void _kcb_dtor(struct kcb *); + +/* 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; +} + +/* + * Get the current kcb. + * + * This can only be called while in a critical region; don't + * worry about having the kcb changed out from under us. + */ +static __inline struct kcb * +_kcb_get(void) +{ + return (_tcb->tcb_curkcb); +} + +/* + * Enter a critical region. + * + * Read and clear km_curthread in the kse mailbox. + */ +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; + } + 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; +} + +static __inline int +_kcb_in_critical(void) +{ + uint32_t flags; + int ret; + + if (_tcb->tcb_isfake != 0) { + /* + * We are in a critical region since there is no + * current thread. + */ + ret = 1; + } else { + flags = _tcb->tcb_tmbx.tm_flags; + _tcb->tcb_tmbx.tm_flags |= TMF_NOUPCALL; + ret = (_tcb->tcb_curkcb->kcb_kmbx.km_curthread == NULL); + _tcb->tcb_tmbx.tm_flags = flags; + } + return (ret); +} + +static __inline void +_tcb_set(struct kcb *kcb, struct tcb *tcb) +{ + if (tcb == NULL) + tcb = &kcb->kcb_faketcb; + kcb->kcb_curtcb = tcb; + tcb->tcb_curkcb = kcb; + _tp = &tcb->tcb_tp; +} + +static __inline struct tcb * +_tcb_get(void) +{ + return (_tcb); +} + +static __inline struct pthread * +_get_curthread(void) +{ + return (_tcb->tcb_thread); +} + +/* + * Get the current kse. + * + * Like _kcb_get(), this can only be called while in a critical region. + */ +static __inline struct kse * +_get_curkse(void) +{ + return (_tcb->tcb_curkcb->kcb_kse); +} + +void _sparc64_enter_uts(kse_func_t uts, struct kse_mailbox *km, 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. */ + kcb->kcb_curtcb = &kcb->kcb_faketcb; + _tp = &kcb->kcb_faketcb.tcb_tp; + _sparc64_enter_uts(kcb->kcb_kmbx.km_func, &kcb->kcb_kmbx, + kcb->kcb_kmbx.km_stack.ss_sp, + kcb->kcb_kmbx.km_stack.ss_size); + /* We should not reach here. */ + return (-1); + } + return (0); +} + +static __inline int +_thread_switch(struct kcb *kcb, struct tcb *tcb, int setmbox) +{ + mcontext_t *mc; + + _tcb_set(kcb, tcb); + mc = &tcb->tcb_tmbx.tm_context.uc_mcontext; + if (setmbox) + _thr_setcontext(mc, (intptr_t)&tcb->tcb_tmbx, + (intptr_t *)&kcb->kcb_kmbx.km_curthread); + else + _thr_setcontext(mc, 0, NULL); + /* We should not reach here. */ + return (-1); +} + +#endif /* _PTHREAD_MD_H_ */ |
