URL
https://opencores.org/ocsvn/openrisc_me/openrisc_me/trunk
Subversion Repositories openrisc_me
[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [lib/] [libcpu/] [hppa1.1/] [include/] [semaphore.h] - Rev 30
Go to most recent revision | Compare with Previous | Blame | View Log
/* * Description: * HPPA fast spinlock semaphores based on LDCWX instruction. * These semaphores are not known to RTEMS. * * TODO: * * COPYRIGHT (c) 1994,95 by Division Incorporated * * The license and distribution terms for this file may be * found in the file LICENSE in this distribution or at * http://www.OARcorp.com/rtems/license.html. * * $Id: semaphore.h,v 1.2 2001-09-27 12:01:21 chris Exp $ */ #ifndef _INCLUDE_HPPA1_1_SEMAPHORE_H #define _INCLUDE_HPPA1_1_SEMAPHORE_H #ifdef __cplusplus extern "C" { #endif /* * This structure has hardware requirements. * LDCWX opcode requires 16byte alignment for the lock * 'lock' must be first member of structure. */ #define SEM_ALIGN 16 typedef volatile struct { rtems_unsigned32 lock __attribute__ ((aligned (SEM_ALIGN))); rtems_unsigned32 flags; void *owner_tcb; /* for debug/commentary only */ rtems_unsigned32 user; /* for use by user */ } hppa_semaphore_t; /* * Values for flags */ #define HPPA_SEM_IN_USE 0x0001 /* semaphore owned by somebody */ #define HPPA_SEM_NO_SPIN 0x0002 /* don't spin if unavailable */ #define HPPA_SEM_INITIALLY_FREE 0x0004 /* init it to be free */ /* * Caller specifiable flags */ #define HPPA_SEM_CALLER_FLAGS (HPPA_SEM_NO_SPIN | HPPA_SEM_INITIALLY_FREE) void hppa_semaphore_pool_initialize(void *pool_base, int pool_size); rtems_unsigned32 hppa_semaphore_acquire(hppa_semaphore_t *sp, int flag); void hppa_semaphore_release(hppa_semaphore_t *sp); hppa_semaphore_t *hppa_semaphore_allocate(rtems_unsigned32 which, int flag); #ifdef __cplusplus } #endif #endif /* ! _INCLUDE_SEMAPHORE_H */
Go to most recent revision | Compare with Previous | Blame | View Log