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/* ==== machdep.h ============================================================
* Copyright (c) 1994 Chris Provenzano (proven@athena.mit.edu) and
* Ken Raeburn (raeburn@mit.edu).
*
* engine-alpha-osf1.h,v 1.4.4.1 1995/12/13 05:41:42 proven Exp
*
*/
#include <unistd.h>
#include <setjmp.h>
#include <sys/time.h>
#include <sys/cdefs.h>
#include <sys/signal.h> /* for _NSIG */
/*
* The first machine dependent functions are the SEMAPHORES
* needing the test and set instruction.
*/
#define SEMAPHORE_CLEAR 0
#define SEMAPHORE_SET 0xffff
#define SEMAPHORE_TEST_AND_SET(lock) \
({ \
volatile long t1, temp = SEMAPHORE_SET; \
__asm__ volatile( \
"1: lwarx %0,0,%1; \
cmpwi %0, 0; \
bne 2f; \
stwcx. %2,0,%1; \
bne- 1b; \
2: " \
:"=r" (t1) \
:"m" (lock), "r" (temp)); \
t1; \
})
#define SEMAPHORE_RESET(lock) *lock = SEMAPHORE_CLEAR
/*
* New types
*/
typedef int semaphore;
/*
* sigset_t macros
*/
#define SIG_ANY(sig) (sig)
#define SIGMAX (_NSIG-1)
/*
* New Strutures
*/
struct machdep_pthread {
void *(*start_routine)(void *);
void *start_argument;
void *machdep_stack;
struct itimerval machdep_timer;
jmp_buf machdep_istate;
unsigned long machdep_fstate[66];
/* 64-bit fp regs 0-31 + fpscr */
/* We pretend the fpscr is 64 bits */
};
/*
* Static machdep_pthread initialization values.
* For initial thread only.
*/
#define MACHDEP_PTHREAD_INIT \
{ NULL, NULL, NULL, { { 0, 0 }, { 0, 100000 } }, { 0 }, { 0 } }
/*
* Minimum stack size
*/
#define PTHREAD_STACK_MIN 2048
/*
* Some fd flag defines that are necessary to distinguish between posix
* behavior and bsd4.3 behavior.
*/
#define __FD_NONBLOCK O_NONBLOCK
/*
* New functions
*/
__BEGIN_DECLS
#if defined(PTHREAD_KERNEL)
#define __machdep_stack_get(x) (x)->machdep_stack
#define __machdep_stack_set(x, y) (x)->machdep_stack = y
#define __machdep_stack_repl(x, y) \
{ \
if ((stack = __machdep_stack_get(x))) { \
__machdep_stack_free(stack); \
} \
__machdep_stack_set(x, y); \
}
int machdep_save_state(void);
void __machdep_save_fp_state(unsigned long *);
void __machdep_restore_fp_state(unsigned long *);
void *__machdep_stack_alloc(size_t);
void __machdep_stack_free(void *);
#endif
__END_DECLS
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