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authorRalf Corsepius <ralf.corsepius@rtems.org>2002-07-22 09:46:48 +0000
committerRalf Corsepius <ralf.corsepius@rtems.org>2002-07-22 09:46:48 +0000
commit2b3e9d9b244e279ef5693a7cf5dacc7903164af5 (patch)
tree955e5242d4d08a8ec747c8350f55003bb9d4b519 /c/src/exec/score/cpu/unix/cpu.c
parentb7b3e5e9397547b4af92c5727c92f58376a08832 (diff)
downloadrtems-2b3e9d9b244e279ef5693a7cf5dacc7903164af5.tar.bz2
Remove, moved to cpukit.
Diffstat (limited to 'c/src/exec/score/cpu/unix/cpu.c')
-rw-r--r--c/src/exec/score/cpu/unix/cpu.c1137
1 files changed, 0 insertions, 1137 deletions
diff --git a/c/src/exec/score/cpu/unix/cpu.c b/c/src/exec/score/cpu/unix/cpu.c
deleted file mode 100644
index dc1b4a9e52..0000000000
--- a/c/src/exec/score/cpu/unix/cpu.c
+++ /dev/null
@@ -1,1137 +0,0 @@
-/*
- * UNIX Simulator Dependent Source
- *
- * 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.
- *
- * $Id$
- */
-
-#include <rtems/system.h>
-#include <rtems/score/isr.h>
-#include <rtems/score/interr.h>
-
-#if defined(__linux__)
-#define _XOPEN_SOURCE
-#define MALLOC_0_RETURNS_NULL
-#endif
-
-#include <sys/types.h>
-#include <sys/times.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <setjmp.h>
-#include <signal.h>
-#include <time.h>
-#include <sys/time.h>
-#include <errno.h>
-#include <unistd.h>
-#if defined(RTEMS_MULTIPROCESSING)
-#include <sys/ipc.h>
-#include <sys/shm.h>
-#include <sys/sem.h>
-#endif
-#include <string.h> /* memset */
-
-#ifndef SA_RESTART
-#define SA_RESTART 0
-#endif
-
-typedef struct {
- jmp_buf regs;
- int isr_level;
-} Context_Control_overlay;
-
-void _CPU_Signal_initialize(void);
-void _CPU_Stray_signal(int);
-void _CPU_ISR_Handler(int);
-
-static sigset_t _CPU_Signal_mask;
-static Context_Control_overlay _CPU_Context_Default_with_ISRs_enabled;
-static Context_Control_overlay _CPU_Context_Default_with_ISRs_disabled;
-
-/*
- * Sync IO support, an entry for each fd that can be set
- */
-
-void _CPU_Sync_io_Init();
-
-static rtems_sync_io_handler _CPU_Sync_io_handlers[FD_SETSIZE];
-static int sync_io_nfds;
-static fd_set sync_io_readfds;
-static fd_set sync_io_writefds;
-static fd_set sync_io_exceptfds;
-
-/*
- * Which cpu are we? Used by libcpu and libbsp.
- */
-
-int cpu_number;
-
-/*PAGE
- *
- * _CPU_Initialize_vectors()
- *
- * Support routine to initialize the RTEMS vector table after it is allocated.
- *
- * UNIX Specific Information:
- *
- * Complete initialization since the table is now allocated.
- */
-
-sigset_t posix_empty_mask;
-
-void _CPU_Initialize_vectors(void)
-{
- unsigned32 i;
- proc_ptr old_handler;
-
- /*
- * Generate an empty mask to be used by disable_support
- */
-
- sigemptyset(&posix_empty_mask);
-
- /*
- * Block all the signals except SIGTRAP for the debugger
- * and fatal error signals.
- */
-
- (void) sigfillset(&_CPU_Signal_mask);
- (void) sigdelset(&_CPU_Signal_mask, SIGTRAP);
- (void) sigdelset(&_CPU_Signal_mask, SIGABRT);
-#if !defined(__CYGWIN__)
- (void) sigdelset(&_CPU_Signal_mask, SIGIOT);
-#endif
- (void) sigdelset(&_CPU_Signal_mask, SIGCONT);
- (void) sigdelset(&_CPU_Signal_mask, SIGSEGV);
- (void) sigdelset(&_CPU_Signal_mask, SIGBUS);
- (void) sigdelset(&_CPU_Signal_mask, SIGFPE);
-
- _CPU_ISR_Enable(1);
-
- /*
- * Set the handler for all signals to be signal_handler
- * which will then vector out to the correct handler
- * for whichever signal actually happened. Initially
- * set the vectors to the stray signal handler.
- */
-
- for (i = 0; i < CPU_INTERRUPT_NUMBER_OF_VECTORS; i++)
- (void)_CPU_ISR_install_vector(i, _CPU_Stray_signal, &old_handler);
-
- _CPU_Signal_initialize();
-}
-
-void _CPU_Signal_initialize( void )
-{
- struct sigaction act;
- sigset_t mask;
-
- /* mark them all active except for TraceTrap and Abort */
-
- mask = _CPU_Signal_mask;
- sigprocmask(SIG_UNBLOCK, &mask, 0);
-
- act.sa_handler = _CPU_ISR_Handler;
- act.sa_mask = mask;
- act.sa_flags = SA_RESTART;
-
- sigaction(SIGHUP, &act, 0);
- sigaction(SIGINT, &act, 0);
- sigaction(SIGQUIT, &act, 0);
- sigaction(SIGILL, &act, 0);
-#ifdef SIGEMT
- sigaction(SIGEMT, &act, 0);
-#endif
- sigaction(SIGFPE, &act, 0);
- sigaction(SIGKILL, &act, 0);
- sigaction(SIGBUS, &act, 0);
- sigaction(SIGSEGV, &act, 0);
-#ifdef SIGSYS
- sigaction(SIGSYS, &act, 0);
-#endif
- sigaction(SIGPIPE, &act, 0);
- sigaction(SIGALRM, &act, 0);
- sigaction(SIGTERM, &act, 0);
- sigaction(SIGUSR1, &act, 0);
- sigaction(SIGUSR2, &act, 0);
- sigaction(SIGCHLD, &act, 0);
-#ifdef SIGCLD
- sigaction(SIGCLD, &act, 0);
-#endif
-#ifdef SIGPWR
- sigaction(SIGPWR, &act, 0);
-#endif
- sigaction(SIGVTALRM, &act, 0);
- sigaction(SIGPROF, &act, 0);
- sigaction(SIGIO, &act, 0);
- sigaction(SIGWINCH, &act, 0);
- sigaction(SIGSTOP, &act, 0);
- sigaction(SIGTTIN, &act, 0);
- sigaction(SIGTTOU, &act, 0);
- sigaction(SIGURG, &act, 0);
-#ifdef SIGLOST
- sigaction(SIGLOST, &act, 0);
-#endif
-}
-
-/*PAGE
- *
- * _CPU_Context_From_CPU_Init
- */
-
-void _CPU_Context_From_CPU_Init()
-{
-
-#if defined(__hppa__) && defined(RTEMS_UNIXLIB_SETJMP)
- /*
- * HACK - set the _SYSTEM_ID to 0x20c so that setjmp/longjmp
- * will handle the full 32 floating point registers.
- */
-
- {
- extern unsigned32 _SYSTEM_ID;
-
- _SYSTEM_ID = 0x20c;
- }
-#endif
-
- /*
- * get default values to use in _CPU_Context_Initialize()
- */
-
- if ( sizeof(Context_Control_overlay) > sizeof(Context_Control) )
- _CPU_Fatal_halt( 0xdeadf00d );
-
- (void) memset(
- &_CPU_Context_Default_with_ISRs_enabled,
- 0,
- sizeof(Context_Control_overlay)
- );
- (void) memset(
- &_CPU_Context_Default_with_ISRs_disabled,
- 0,
- sizeof(Context_Control_overlay)
- );
-
- _CPU_ISR_Set_level( 0 );
- _CPU_Context_switch(
- (Context_Control *) &_CPU_Context_Default_with_ISRs_enabled,
- (Context_Control *) &_CPU_Context_Default_with_ISRs_enabled
- );
-
- _CPU_ISR_Set_level( 1 );
- _CPU_Context_switch(
- (Context_Control *) &_CPU_Context_Default_with_ISRs_disabled,
- (Context_Control *) &_CPU_Context_Default_with_ISRs_disabled
- );
-}
-
-/*PAGE
- *
- * _CPU_Sync_io_Init
- */
-
-void _CPU_Sync_io_Init()
-{
- int fd;
-
- for (fd = 0; fd < FD_SETSIZE; fd++)
- _CPU_Sync_io_handlers[fd] = NULL;
-
- sync_io_nfds = 0;
- FD_ZERO(&sync_io_readfds);
- FD_ZERO(&sync_io_writefds);
- FD_ZERO(&sync_io_exceptfds);
-}
-
-/*PAGE
- *
- * _CPU_ISR_Get_level
- */
-
-unsigned32 _CPU_ISR_Get_level( void )
-{
- sigset_t old_mask;
-
- sigemptyset( &old_mask );
- sigprocmask(SIG_BLOCK, 0, &old_mask);
-
- if (memcmp((void *)&posix_empty_mask, (void *)&old_mask, sizeof(sigset_t)))
- return 1;
-
- return 0;
-}
-
-/* _CPU_Initialize
- *
- * This routine performs processor dependent initialization.
- *
- * INPUT PARAMETERS:
- * cpu_table - CPU table to initialize
- * thread_dispatch - address of disptaching routine
- */
-
-
-void _CPU_Initialize(
- rtems_cpu_table *cpu_table,
- void (*thread_dispatch) /* ignored on this CPU */
-)
-{
- /*
- * If something happened where the public Context_Control is not
- * at least as large as the private Context_Control_overlay, then
- * we are in trouble.
- */
-
- if ( sizeof(Context_Control_overlay) > sizeof(Context_Control) )
- _CPU_Fatal_error(0x100 + 1);
-
- /*
- * The thread_dispatch argument is the address of the entry point
- * for the routine called at the end of an ISR once it has been
- * decided a context switch is necessary. On some compilation
- * systems it is difficult to call a high-level language routine
- * from assembly. This allows us to trick these systems.
- *
- * If you encounter this problem save the entry point in a CPU
- * dependent variable.
- */
-
- _CPU_Thread_dispatch_pointer = thread_dispatch;
-
- /*
- * XXX; If there is not an easy way to initialize the FP context
- * during Context_Initialize, then it is usually easier to
- * save an "uninitialized" FP context here and copy it to
- * the task's during Context_Initialize.
- */
-
- /* XXX: FP context initialization support */
-
- _CPU_Table = *cpu_table;
-
- _CPU_Sync_io_Init();
-
- _CPU_Context_From_CPU_Init();
-
-}
-
-/*PAGE
- *
- * _CPU_ISR_install_raw_handler
- */
-
-void _CPU_ISR_install_raw_handler(
- unsigned32 vector,
- proc_ptr new_handler,
- proc_ptr *old_handler
-)
-{
- _CPU_Fatal_halt( 0xdeaddead );
-}
-
-/*PAGE
- *
- * _CPU_ISR_install_vector
- *
- * This kernel routine installs the RTEMS handler for the
- * specified vector.
- *
- * Input parameters:
- * vector - interrupt vector number
- * old_handler - former ISR for this vector number
- * new_handler - replacement ISR for this vector number
- *
- * Output parameters: NONE
- *
- */
-
-
-void _CPU_ISR_install_vector(
- unsigned32 vector,
- proc_ptr new_handler,
- proc_ptr *old_handler
-)
-{
- *old_handler = _ISR_Vector_table[ vector ];
-
- /*
- * If the interrupt vector table is a table of pointer to isr entry
- * points, then we need to install the appropriate RTEMS interrupt
- * handler for this vector number.
- */
-
- /*
- * We put the actual user ISR address in '_ISR_vector_table'. This will
- * be used by the _CPU_ISR_Handler so the user gets control.
- */
-
- _ISR_Vector_table[ vector ] = new_handler;
-}
-
-/*PAGE
- *
- * _CPU_Install_interrupt_stack
- */
-
-void _CPU_Install_interrupt_stack( void )
-{
-}
-
-/*PAGE
- *
- * _CPU_Thread_Idle_body
- *
- * Stop until we get a signal which is the logically the same thing
- * entering low-power or sleep mode on a real processor and waiting for
- * an interrupt. This significantly reduces the consumption of host
- * CPU cycles which is again similar to low power mode.
- */
-
-void _CPU_Thread_Idle_body( void )
-{
-#if CPU_SYNC_IO
- extern void _Thread_Dispatch(void);
- int fd;
-#endif
-
- while (1) {
-#ifdef RTEMS_DEBUG
- /* interrupts had better be enabled at this point! */
- if (_CPU_ISR_Get_level() != 0)
- abort();
-#endif
-
- /*
- * Block on a select statement, the CPU interface added allow the
- * user to add new descriptors which are to be blocked on
- */
-
-#if CPU_SYNC_IO
- if (sync_io_nfds) {
- int result;
- fd_set readfds, writefds, exceptfds;
-
- readfds = sync_io_readfds;
- writefds = sync_io_writefds;
- exceptfds = sync_io_exceptfds;
- result = select(sync_io_nfds,
- &readfds,
- &writefds,
- &exceptfds,
- NULL);
-
- if (result < 0) {
- if (errno != EINTR)
- _CPU_Fatal_error(0x200); /* FIXME : what number should go here !! */
- _Thread_Dispatch();
- continue;
- }
-
- for (fd = 0; fd < sync_io_nfds; fd++) {
- boolean read = FD_ISSET(fd, &readfds);
- boolean write = FD_ISSET(fd, &writefds);
- boolean except = FD_ISSET(fd, &exceptfds);
-
- if (_CPU_Sync_io_handlers[fd] && (read || write || except))
- _CPU_Sync_io_handlers[fd](fd, read, write, except);
- }
-
- _Thread_Dispatch();
- } else
- pause();
-#else
- pause();
-#endif
-
- }
-
-}
-
-/*PAGE
- *
- * _CPU_Context_Initialize
- */
-
-void _CPU_Context_Initialize(
- Context_Control *_the_context,
- unsigned32 *_stack_base,
- unsigned32 _size,
- unsigned32 _new_level,
- void *_entry_point,
- boolean _is_fp
-)
-{
- unsigned32 *addr;
- unsigned32 jmp_addr;
- unsigned32 _stack_low; /* lowest "stack aligned" address */
- unsigned32 _stack_high; /* highest "stack aligned" address */
- unsigned32 _the_size;
-
- jmp_addr = (unsigned32) _entry_point;
-
- /*
- * On CPUs with stacks which grow down, we build the stack
- * based on the _stack_high address. On CPUs with stacks which
- * grow up, we build the stack based on the _stack_low address.
- */
-
- _stack_low = (unsigned32)(_stack_base) + CPU_STACK_ALIGNMENT - 1;
- _stack_low &= ~(CPU_STACK_ALIGNMENT - 1);
-
- _stack_high = (unsigned32)(_stack_base) + _size;
- _stack_high &= ~(CPU_STACK_ALIGNMENT - 1);
-
- if (_stack_high > _stack_low)
- _the_size = _stack_high - _stack_low;
- else
- _the_size = _stack_low - _stack_high;
-
- /*
- * Slam our jmp_buf template into the context we are creating
- */
-
- if ( _new_level == 0 )
- *(Context_Control_overlay *)_the_context =
- _CPU_Context_Default_with_ISRs_enabled;
- else
- *(Context_Control_overlay *)_the_context =
- _CPU_Context_Default_with_ISRs_disabled;
-
- addr = (unsigned32 *)_the_context;
-
-#if defined(__hppa__)
- *(addr + RP_OFF) = jmp_addr;
- *(addr + SP_OFF) = (unsigned32)(_stack_low + CPU_FRAME_SIZE);
-
- /*
- * See if we are using shared libraries by checking
- * bit 30 in 24 off of newp. If bit 30 is set then
- * we are using shared libraries and the jump address
- * points to the pointer, so we put that into rp instead.
- */
-
- if (jmp_addr & 0x40000000) {
- jmp_addr &= 0xfffffffc;
- *(addr + RP_OFF) = *(unsigned32 *)jmp_addr;
- }
-#elif defined(__sparc__)
-
- /*
- * See /usr/include/sys/stack.h in Solaris 2.3 for a nice
- * diagram of the stack.
- */
-
- asm ("ta 0x03"); /* flush registers */
-
- *(addr + RP_OFF) = jmp_addr + ADDR_ADJ_OFFSET;
- *(addr + SP_OFF) = (unsigned32)(_stack_high - CPU_FRAME_SIZE);
- *(addr + FP_OFF) = (unsigned32)(_stack_high);
-
-#elif defined(__i386__)
-
- /*
- * This information was gathered by disassembling setjmp().
- */
-
- {
- unsigned32 stack_ptr;
-
- stack_ptr = _stack_high - CPU_FRAME_SIZE;
-
- *(addr + EBX_OFF) = 0xFEEDFEED;
- *(addr + ESI_OFF) = 0xDEADDEAD;
- *(addr + EDI_OFF) = 0xDEAFDEAF;
- *(addr + EBP_OFF) = stack_ptr;
- *(addr + ESP_OFF) = stack_ptr;
- *(addr + RET_OFF) = jmp_addr;
-
- addr = (unsigned32 *) stack_ptr;
-
- addr[ 0 ] = jmp_addr;
- addr[ 1 ] = (unsigned32) stack_ptr;
- addr[ 2 ] = (unsigned32) stack_ptr;
- }
-
-#else
-#error "UNKNOWN CPU!!!"
-#endif
-
-}
-
-/*PAGE
- *
- * _CPU_Context_restore
- */
-
-void _CPU_Context_restore(
- Context_Control *next
-)
-{
- Context_Control_overlay *nextp = (Context_Control_overlay *)next;
-
- _CPU_ISR_Enable(nextp->isr_level);
- longjmp( nextp->regs, 0 );
-}
-
-/*PAGE
- *
- * _CPU_Context_switch
- */
-
-static void do_jump(
- Context_Control_overlay *currentp,
- Context_Control_overlay *nextp
-);
-
-void _CPU_Context_switch(
- Context_Control *current,
- Context_Control *next
-)
-{
- Context_Control_overlay *currentp = (Context_Control_overlay *)current;
- Context_Control_overlay *nextp = (Context_Control_overlay *)next;
-#if 0
- int status;
-#endif
-
- currentp->isr_level = _CPU_ISR_Disable_support();
-
- do_jump( currentp, nextp );
-
-#if 0
- if (sigsetjmp(currentp->regs, 1) == 0) { /* Save the current context */
- siglongjmp(nextp->regs, 0); /* Switch to the new context */
- _Internal_error_Occurred(
- INTERNAL_ERROR_CORE,
- TRUE,
- status
- );
- }
-#endif
-
-#ifdef RTEMS_DEBUG
- if (_CPU_ISR_Get_level() == 0)
- abort();
-#endif
-
- _CPU_ISR_Enable(currentp->isr_level);
-}
-
-static void do_jump(
- Context_Control_overlay *currentp,
- Context_Control_overlay *nextp
-)
-{
- int status;
-
- if (setjmp(currentp->regs) == 0) { /* Save the current context */
- longjmp(nextp->regs, 0); /* Switch to the new context */
- _Internal_error_Occurred(
- INTERNAL_ERROR_CORE,
- TRUE,
- status
- );
- }
-}
-
-/*PAGE
- *
- * _CPU_Save_float_context
- */
-
-void _CPU_Save_float_context(
- Context_Control_fp *fp_context
-)
-{
-}
-
-/*PAGE
- *
- * _CPU_Restore_float_context
- */
-
-void _CPU_Restore_float_context(
- Context_Control_fp *fp_context
-)
-{
-}
-
-/*PAGE
- *
- * _CPU_ISR_Disable_support
- */
-
-unsigned32 _CPU_ISR_Disable_support(void)
-{
- int status;
- sigset_t old_mask;
-
- sigemptyset( &old_mask );
- status = sigprocmask(SIG_BLOCK, &_CPU_Signal_mask, &old_mask);
- if ( status )
- _Internal_error_Occurred(
- INTERNAL_ERROR_CORE,
- TRUE,
- status
- );
-
- if (memcmp((void *)&posix_empty_mask, (void *)&old_mask, sizeof(sigset_t)))
- return 1;
-
- return 0;
-}
-
-/*PAGE
- *
- * _CPU_ISR_Enable
- */
-
-void _CPU_ISR_Enable(
- unsigned32 level
-)
-{
- int status;
-
- if (level == 0)
- status = sigprocmask(SIG_UNBLOCK, &_CPU_Signal_mask, 0);
- else
- status = sigprocmask(SIG_BLOCK, &_CPU_Signal_mask, 0);
-
- if ( status )
- _Internal_error_Occurred(
- INTERNAL_ERROR_CORE,
- TRUE,
- status
- );
-}
-
-/*PAGE
- *
- * _CPU_ISR_Handler
- *
- * External interrupt handler.
- * This is installed as a UNIX signal handler.
- * It vectors out to specific user interrupt handlers.
- */
-
-void _CPU_ISR_Handler(int vector)
-{
- extern void _Thread_Dispatch(void);
- extern unsigned32 _Thread_Dispatch_disable_level;
- extern boolean _Context_Switch_necessary;
-
- if (_ISR_Nest_level++ == 0) {
- /* switch to interrupt stack */
- }
-
- _Thread_Dispatch_disable_level++;
-
- if (_ISR_Vector_table[vector]) {
- _ISR_Vector_table[vector](vector);
- } else {
- _CPU_Stray_signal(vector);
- }
-
- if (_ISR_Nest_level-- == 0) {
- /* switch back to original stack */
- }
-
- _Thread_Dispatch_disable_level--;
-
- if (_Thread_Dispatch_disable_level == 0 &&
- (_Context_Switch_necessary || _ISR_Signals_to_thread_executing)) {
- _ISR_Signals_to_thread_executing = FALSE;
- _CPU_ISR_Enable(0);
- _Thread_Dispatch();
- }
-}
-
-/*PAGE
- *
- * _CPU_Stray_signal
- */
-
-void _CPU_Stray_signal(int sig_num)
-{
- char buffer[ 4 ];
-
- /*
- * print "stray" msg about ones which that might mean something
- * Avoid using the stdio section of the library.
- * The following is generally safe.
- */
-
- switch (sig_num)
- {
-#ifdef SIGCLD
- case SIGCLD:
- break;
-#endif
- default:
- {
- /*
- * We avoid using the stdio section of the library.
- * The following is generally safe
- */
-
- int digit;
- int number = sig_num;
- int len = 0;
-
- digit = number / 100;
- number %= 100;
- if (digit) buffer[len++] = '0' + digit;
-
- digit = number / 10;
- number %= 10;
- if (digit || len) buffer[len++] = '0' + digit;
-
- digit = number;
- buffer[len++] = '0' + digit;
-
- buffer[ len++ ] = '\n';
-
- write( 2, "Stray signal ", 13 );
- write( 2, buffer, len );
-
- }
- }
-
- /*
- * If it was a "fatal" signal, then exit here
- * If app code has installed a hander for one of these, then
- * we won't call _CPU_Stray_signal, so this is ok.
- */
-
- switch (sig_num) {
- case SIGINT:
- case SIGHUP:
- case SIGQUIT:
- case SIGILL:
-#ifdef SIGEMT
- case SIGEMT:
-#endif
- case SIGKILL:
- case SIGBUS:
- case SIGSEGV:
- case SIGTERM:
-#if !defined(__CYGWIN__)
- case SIGIOT:
-#endif
- _CPU_Fatal_error(0x100 + sig_num);
- }
-}
-
-/*PAGE
- *
- * _CPU_Fatal_error
- */
-
-void _CPU_Fatal_error(unsigned32 error)
-{
- setitimer(ITIMER_REAL, 0, 0);
-
- if ( error ) {
-#ifdef RTEMS_DEBUG
- abort();
-#endif
- if (getenv("RTEMS_DEBUG"))
- abort();
- }
-
- _exit(error);
-}
-
-/*
- * Special Purpose Routines to hide the use of UNIX system calls.
- */
-
-int _CPU_Set_sync_io_handler(
- int fd,
- boolean read,
- boolean write,
- boolean except,
- rtems_sync_io_handler handler
-)
-{
- if ((fd < FD_SETSIZE) && (_CPU_Sync_io_handlers[fd] == NULL)) {
- if (read)
- FD_SET(fd, &sync_io_readfds);
- else
- FD_CLR(fd, &sync_io_readfds);
- if (write)
- FD_SET(fd, &sync_io_writefds);
- else
- FD_CLR(fd, &sync_io_writefds);
- if (except)
- FD_SET(fd, &sync_io_exceptfds);
- else
- FD_CLR(fd, &sync_io_exceptfds);
- _CPU_Sync_io_handlers[fd] = handler;
- if ((fd + 1) > sync_io_nfds)
- sync_io_nfds = fd + 1;
- return 0;
- }
- return -1;
-}
-
-int _CPU_Clear_sync_io_handler(
- int fd
-)
-{
- if ((fd < FD_SETSIZE) && _CPU_Sync_io_handlers[fd]) {
- FD_CLR(fd, &sync_io_readfds);
- FD_CLR(fd, &sync_io_writefds);
- FD_CLR(fd, &sync_io_exceptfds);
- _CPU_Sync_io_handlers[fd] = NULL;
- sync_io_nfds = 0;
- for (fd = 0; fd < FD_SETSIZE; fd++)
- if (FD_ISSET(fd, &sync_io_readfds) ||
- FD_ISSET(fd, &sync_io_writefds) ||
- FD_ISSET(fd, &sync_io_exceptfds))
- sync_io_nfds = fd + 1;
- return 0;
- }
- return -1;
-}
-
-int _CPU_Get_clock_vector( void )
-{
- return SIGALRM;
-}
-
-void _CPU_Start_clock(
- int microseconds
-)
-{
- struct itimerval new;
-
- new.it_value.tv_sec = 0;
- new.it_value.tv_usec = microseconds;
- new.it_interval.tv_sec = 0;
- new.it_interval.tv_usec = microseconds;
-
- setitimer(ITIMER_REAL, &new, 0);
-}
-
-void _CPU_Stop_clock( void )
-{
- struct itimerval new;
- struct sigaction act;
-
- /*
- * Set the SIGALRM signal to ignore any last
- * signals that might come in while we are
- * disarming the timer and removing the interrupt
- * vector.
- */
-
- (void) memset(&act, 0, sizeof(act));
- act.sa_handler = SIG_IGN;
-
- sigaction(SIGALRM, &act, 0);
-
- (void) memset(&new, 0, sizeof(new));
- setitimer(ITIMER_REAL, &new, 0);
-}
-
-#if 0
-extern void fix_syscall_errno( void );
-#endif
-#define fix_syscall_errno()
-
-#if defined(RTEMS_MULTIPROCESSING)
-int _CPU_SHM_Semid;
-
-void _CPU_SHM_Init(
- unsigned32 maximum_nodes,
- boolean is_master_node,
- void **shm_address,
- unsigned32 *shm_length
-)
-{
- int i;
- int shmid;
- char *shm_addr;
- key_t shm_key;
- key_t sem_key;
- int status = 0; /* to avoid unitialized warnings */
- int shm_size;
-
- if (getenv("RTEMS_SHM_KEY"))
- shm_key = strtol(getenv("RTEMS_SHM_KEY"), 0, 0);
- else
-#ifdef RTEMS_SHM_KEY
- shm_key = RTEMS_SHM_KEY;
-#else
- shm_key = 0xa000;
-#endif
-
- if (getenv("RTEMS_SHM_SIZE"))
- shm_size = strtol(getenv("RTEMS_SHM_SIZE"), 0, 0);
- else
-#ifdef RTEMS_SHM_SIZE
- shm_size = RTEMS_SHM_SIZE;
-#else
- shm_size = 64 * 1024;
-#endif
-
- if (getenv("RTEMS_SHM_SEMAPHORE_KEY"))
- sem_key = strtol(getenv("RTEMS_SHM_SEMAPHORE_KEY"), 0, 0);
- else
-#ifdef RTEMS_SHM_SEMAPHORE_KEY
- sem_key = RTEMS_SHM_SEMAPHORE_KEY;
-#else
- sem_key = 0xa001;
-#endif
-
- shmid = shmget(shm_key, shm_size, IPC_CREAT | 0660);
- if ( shmid == -1 ) {
- fix_syscall_errno(); /* in case of newlib */
- perror( "shmget" );
- _CPU_Fatal_halt( 0xdead0001 );
- }
-
- shm_addr = shmat(shmid, (char *)0, SHM_RND);
- if ( shm_addr == (void *)-1 ) {
- fix_syscall_errno(); /* in case of newlib */
- perror( "shmat" );
- _CPU_Fatal_halt( 0xdead0002 );
- }
-
- _CPU_SHM_Semid = semget(sem_key, maximum_nodes + 1, IPC_CREAT | 0660);
- if ( _CPU_SHM_Semid == -1 ) {
- fix_syscall_errno(); /* in case of newlib */
- perror( "semget" );
- _CPU_Fatal_halt( 0xdead0003 );
- }
-
- if ( is_master_node ) {
- for ( i=0 ; i <= maximum_nodes ; i++ ) {
-#if !HAS_UNION_SEMUN
- union semun {
- int val;
- struct semid_ds *buf;
- unsigned short int *array;
-#if defined(__linux__)
- struct seminfo *__buf;
-#endif
- } ;
-#endif
- union semun help ;
- help.val = 1;
- status = semctl( _CPU_SHM_Semid, i, SETVAL, help );
-
- fix_syscall_errno(); /* in case of newlib */
- if ( status == -1 ) {
- _CPU_Fatal_halt( 0xdead0004 );
- }
- }
- }
-
- *shm_address = shm_addr;
- *shm_length = shm_size;
-
-}
-#endif
-
-int _CPU_Get_pid( void )
-{
- return getpid();
-}
-
-#if defined(RTEMS_MULTIPROCESSING)
-/*
- * Define this to use signals for MPCI shared memory driver.
- * If undefined, the shared memory driver will poll from the
- * clock interrupt.
- * Ref: ../shmsupp/getcfg.c
- *
- * BEWARE:: many UN*X kernels and debuggers become severely confused when
- * debugging programs which use signals. The problem is *much*
- * worse when using multiple signals, since ptrace(2) tends to
- * drop all signals except 1 in the case of multiples.
- * On hpux9, this problem was so bad, we couldn't use interrupts
- * with the shared memory driver if we ever hoped to debug
- * RTEMS programs.
- * Maybe systems that use /proc don't have this problem...
- */
-
-
-int _CPU_SHM_Get_vector( void )
-{
-#ifdef CPU_USE_SHM_INTERRUPTS
- return SIGUSR1;
-#else
- return 0;
-#endif
-}
-
-void _CPU_SHM_Send_interrupt(
- int pid,
- int vector
-)
-{
- kill((pid_t) pid, vector);
-}
-
-void _CPU_SHM_Lock(
- int semaphore
-)
-{
- struct sembuf sb;
-
- sb.sem_num = semaphore;
- sb.sem_op = -1;
- sb.sem_flg = 0;
-
- while (1) {
- int status = -1;
-
- status = semop(_CPU_SHM_Semid, &sb, 1);
- if ( status >= 0 )
- break;
- if ( status == -1 ) {
- fix_syscall_errno(); /* in case of newlib */
- if (errno == EINTR)
- continue;
- perror("shm lock");
- _CPU_Fatal_halt( 0xdead0005 );
- }
- }
-
-}
-
-void _CPU_SHM_Unlock(
- int semaphore
-)
-{
- struct sembuf sb;
- int status;
-
- sb.sem_num = semaphore;
- sb.sem_op = 1;
- sb.sem_flg = 0;
-
- while (1) {
- status = semop(_CPU_SHM_Semid, &sb, 1);
- if ( status >= 0 )
- break;
-
- if ( status == -1 ) {
- fix_syscall_errno(); /* in case of newlib */
- if (errno == EINTR)
- continue;
- perror("shm unlock");
- _CPU_Fatal_halt( 0xdead0006 );
- }
- }
-
-}
-#endif