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author | Joel Sherrill <joel.sherrill@OARcorp.com> | 1995-07-12 19:47:25 +0000 |
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committer | Joel Sherrill <joel.sherrill@OARcorp.com> | 1995-07-12 19:47:25 +0000 |
commit | 637df35f96d8023056369fcf2c9943419f1a1b74 (patch) | |
tree | a12bd461bf892ccaff6c67571432f0535eb03e96 /c/src/lib/libbsp/unix/posix/shmsupp | |
parent | added David Glessner's 68302 work. (diff) | |
download | rtems-637df35f96d8023056369fcf2c9943419f1a1b74.tar.bz2 |
Ada95, gnat, go32
Diffstat (limited to 'c/src/lib/libbsp/unix/posix/shmsupp')
-rw-r--r-- | c/src/lib/libbsp/unix/posix/shmsupp/README | 9 | ||||
-rw-r--r-- | c/src/lib/libbsp/unix/posix/shmsupp/addrconv.c | 32 | ||||
-rw-r--r-- | c/src/lib/libbsp/unix/posix/shmsupp/getcfg.c | 136 | ||||
-rw-r--r-- | c/src/lib/libbsp/unix/posix/shmsupp/intr.c | 31 | ||||
-rw-r--r-- | c/src/lib/libbsp/unix/posix/shmsupp/lock.c | 117 | ||||
-rw-r--r-- | c/src/lib/libbsp/unix/posix/shmsupp/mpisr.c | 29 |
6 files changed, 354 insertions, 0 deletions
diff --git a/c/src/lib/libbsp/unix/posix/shmsupp/README b/c/src/lib/libbsp/unix/posix/shmsupp/README new file mode 100644 index 0000000000..93d6fcbe8c --- /dev/null +++ b/c/src/lib/libbsp/unix/posix/shmsupp/README @@ -0,0 +1,9 @@ +# +# $Id$ +# + +This directory contains the SHM driver support files for +System V/POSIX derived UNIX flavors. + +WARNING: The interrupt support in this directory currently will + only work in a homogeneous system. diff --git a/c/src/lib/libbsp/unix/posix/shmsupp/addrconv.c b/c/src/lib/libbsp/unix/posix/shmsupp/addrconv.c new file mode 100644 index 0000000000..fd3ba689bd --- /dev/null +++ b/c/src/lib/libbsp/unix/posix/shmsupp/addrconv.c @@ -0,0 +1,32 @@ +/* rtems_unsigned32 *Shm_Convert_address( addr ) + * + * No address range conversion is required. + * + * Input parameters: + * addr - address to convert + * + * Output parameters: + * returns - converted address + * + * COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994. + * On-Line Applications Research Corporation (OAR). + * All rights assigned to U.S. Government, 1994. + * + * This material may be reproduced by or for the U.S. Government pursuant + * to the copyright license under the clause at DFARS 252.227-7013. This + * notice must appear in all copies of this file and its derivatives. + * + * $Id$ + */ + +#include <rtems.h> + +#include <bsp.h> +#include <shm.h> + +void *Shm_Convert_address( + void *addr +) +{ + return ( addr ); +} diff --git a/c/src/lib/libbsp/unix/posix/shmsupp/getcfg.c b/c/src/lib/libbsp/unix/posix/shmsupp/getcfg.c new file mode 100644 index 0000000000..14158f4516 --- /dev/null +++ b/c/src/lib/libbsp/unix/posix/shmsupp/getcfg.c @@ -0,0 +1,136 @@ +/* void Shm_get_config( localnode, &shmcfg ) + * + * This routine initializes, if necessary, and returns a pointer + * to the Shared Memory Configuration Table for the UNIX + * simulator. + * + * INPUT PARAMETERS: + * localnode - local node number + * shmcfg - address of pointer to SHM Config Table + * + * OUTPUT PARAMETERS: + * *shmcfg - pointer to SHM Config Table + * + * NOTES: The MP interrupt used is the Runway bus' ability to directly + * address the control registers of up to four CPUs and cause + * interrupts on them. + * + * The following table illustrates the configuration limitations: + * + * BUS MAX + * MODE ENDIAN NODES + * ========= ====== ======= + * POLLED BIG 2+ + * INTERRUPT BIG 2..4 + * + * COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994. + * On-Line Applications Research Corporation (OAR). + * All rights assigned to U.S. Government, 1994. + * + * This material may be reproduced by or for the U.S. Government pursuant + * to the copyright license under the clause at DFARS 252.227-7013. This + * notice must appear in all copies of this file and its derivatives. + * + * $Id$ + */ + +#include <rtems.h> + +#include <shm.h> +#include <bsp.h> + +#include <stdio.h> +#include <errno.h> +#include <unistd.h> +#include <sys/types.h> +#include <sys/ipc.h> +#include <sys/shm.h> +#include <sys/sem.h> + +#define INTERRUPT 0 /* can be interrupt or polling */ +#define POLLING 1 + +shm_config_table BSP_shm_cfgtbl; + +int semid; + +void Shm_Cause_interrupt_unix( + rtems_unsigned32 node +); + +void Shm_Get_configuration( + rtems_unsigned32 localnode, + shm_config_table **shmcfg +) +{ + rtems_unsigned32 maximum_nodes; + int i; + int shmid; + char *shm_addr; + key_t shm_key; + key_t sem_key; + struct sembuf sb; + int status; + + shm_key = 0xa000; + + shmid = shmget(shm_key, 16 * KILOBYTE, IPC_CREAT | 0660); + if ( shmid == -1 ) { + perror( "shmget" ); + exit( 0 ); + } + + shm_addr = shmat(shmid, (char *)0, SHM_RND); + if ( shm_addr == (void *)-1 ) { + perror( "shmat" ); + exit( 0 ); + } + + sem_key = 0xa001; + + maximum_nodes = Shm_RTEMS_MP_Configuration->maximum_nodes; + semid = semget(sem_key, maximum_nodes + 1, IPC_CREAT | 0660); + if ( semid == -1 ) { + perror( "semget" ); + exit( 0 ); + } + + if ( Shm_Is_master_node() ) { + for ( i=0 ; i <= maximum_nodes ; i++ ) { + sb.sem_op = 1; + sb.sem_num = i; + sb.sem_flg = 0; + status = semop( semid, &sb, 1 ); + if ( status == -1 ) { + fprintf( stderr, "Sem init failed %d\n", errno ); fflush( stderr ); + exit( 0 ); + } + } + } + + BSP_shm_cfgtbl.base = (vol_u32 *)shm_addr; + BSP_shm_cfgtbl.length = 16 * KILOBYTE; + BSP_shm_cfgtbl.format = SHM_BIG; + + BSP_shm_cfgtbl.cause_intr = Shm_Cause_interrupt_unix; + +#ifdef NEUTRAL_BIG + BSP_shm_cfgtbl.convert = NULL_CONVERT; +#else + BSP_shm_cfgtbl.convert = CPU_swap_u32; +#endif + +#if ( POLLING == 1 ) + BSP_shm_cfgtbl.poll_intr = POLLED_MODE; + BSP_shm_cfgtbl.Intr.address = NO_INTERRUPT; + BSP_shm_cfgtbl.Intr.value = NO_INTERRUPT; + BSP_shm_cfgtbl.Intr.length = NO_INTERRUPT; +#else + BSP_shm_cfgtbl.poll_intr = INTR_MODE; + BSP_shm_cfgtbl.Intr.address = 0; /* process id? */ + BSP_shm_cfgtbl.Intr.value = 0; /* signal to send? */ + BSP_shm_cfgtbl.Intr.length = LONG; +#endif + + *shmcfg = &BSP_shm_cfgtbl; +} diff --git a/c/src/lib/libbsp/unix/posix/shmsupp/intr.c b/c/src/lib/libbsp/unix/posix/shmsupp/intr.c new file mode 100644 index 0000000000..44259479db --- /dev/null +++ b/c/src/lib/libbsp/unix/posix/shmsupp/intr.c @@ -0,0 +1,31 @@ +/* void Shm_interrupt_unix( node ) + * + * This routine is the shared memory driver routine which + * generates interrupts to other CPUs. + * + * Input parameters: + * node - destination of this packet (0 = broadcast) + * + * Output parameters: NONE + * + * COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994. + * On-Line Applications Research Corporation (OAR). + * All rights assigned to U.S. Government, 1994. + * + * This material may be reproduced by or for the U.S. Government pursuant + * to the copyright license under the clause at DFARS 252.227-7013. This + * notice must appear in all copies of this file and its derivatives. + * + * $Id$ + */ + +#include <rtems.h> +#include <shm.h> + +#include <stdio.h> + +void Shm_Cause_interrupt_unix( + rtems_unsigned32 node +) +{ +} diff --git a/c/src/lib/libbsp/unix/posix/shmsupp/lock.c b/c/src/lib/libbsp/unix/posix/shmsupp/lock.c new file mode 100644 index 0000000000..da39cc86f5 --- /dev/null +++ b/c/src/lib/libbsp/unix/posix/shmsupp/lock.c @@ -0,0 +1,117 @@ +/* Shared Memory Lock Routines + * + * This shared memory locked queue support routine need to be + * able to lock the specified locked queue. Interrupts are + * disabled while the queue is locked to prevent preemption + * and deadlock when two tasks poll for the same lock. + * previous level. + * + * COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994. + * On-Line Applications Research Corporation (OAR). + * All rights assigned to U.S. Government, 1994. + * + * This material may be reproduced by or for the U.S. Government pursuant + * to the copyright license under the clause at DFARS 252.227-7013. This + * notice must appear in all copies of this file and its derivatives. + * + * $Id$ + */ + +#include <rtems.h> + +#include <bsp.h> +#include <shm.h> + +#include <errno.h> +#include <stdio.h> +#include <unistd.h> +#include <sys/ipc.h> +#include <sys/shm.h> +#include <sys/sem.h> + +extern int semid; + +/* + * Shm_Initialize_lock + * + * Initialize the lock for the specified locked queue. + */ + +void Shm_Initialize_lock( + Shm_Locked_queue_Control *lq_cb +) +{ + lq_cb->lock = + ( lq_cb - Shm_Locked_queues ) / sizeof( Shm_Locked_queue_Control ); +} + +/* Shm_Lock( &lq_cb ) + * + * This shared memory locked queue support routine locks the + * specified locked queue. It disables interrupts to prevent + * a deadlock condition. + */ + +void Shm_Lock( + Shm_Locked_queue_Control *lq_cb +) +{ + rtems_unsigned32 isr_level; + struct sembuf sb; + int status; + + isr_level = 0; + + sb.sem_num = lq_cb->lock; + sb.sem_op = -1; + sb.sem_flg = 0; + rtems_interrupt_disable( isr_level ); + + Shm_isrstat = isr_level; + + while (1) { + status = semop(semid, &sb, 1); + if ( status == 0 ) + break; + if ( status == -1 && errno == EINTR ) + continue; + + fprintf( stderr, "shm lock (%d %d)\n", status, errno ); + exit( 0 ); + } +} + +/* + * Shm_Unlock + * + * Unlock the lock for the specified locked queue. + */ + +void Shm_Unlock( + Shm_Locked_queue_Control *lq_cb +) +{ + rtems_unsigned32 isr_level; + struct sembuf sb; + int status; + + isr_level = 0; + + sb.sem_num = lq_cb->lock; + sb.sem_op = 1; + sb.sem_flg = 0; + + while (1) { + status = semop(semid, &sb, 1); + if ( status == 0 ) + break; + if ( status == -1 && errno == EINTR ) + continue; + + fprintf( stderr, "shm lock (%d %d)\n", status, errno ); fflush( stderr ); + exit( 0 ); + } + + isr_level = Shm_isrstat; + rtems_interrupt_enable( isr_level ); +} diff --git a/c/src/lib/libbsp/unix/posix/shmsupp/mpisr.c b/c/src/lib/libbsp/unix/posix/shmsupp/mpisr.c new file mode 100644 index 0000000000..02bee168a6 --- /dev/null +++ b/c/src/lib/libbsp/unix/posix/shmsupp/mpisr.c @@ -0,0 +1,29 @@ +/* Shm_setvec + * + * This driver routine sets the SHM interrupt vector to point to the + * driver's SHM interrupt service routine. + * + * Input parameters: NONE + * + * Output parameters: NONE + * + * COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994. + * On-Line Applications Research Corporation (OAR). + * All rights assigned to U.S. Government, 1994. + * + * This material may be reproduced by or for the U.S. Government pursuant + * to the copyright license under the clause at DFARS 252.227-7013. This + * notice must appear in all copies of this file and its derivatives. + * + * $Id$ + */ + +#include <rtems.h> + +#include <bsp.h> +#include <shm.h> + +void Shm_setvec( void ) +{ + set_vector( Shm_isr, INTERRUPT_EXTERNAL_MPCI, 1 ); +} |