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Diffstat (limited to 'cpukit/score/cpu/unix/cpu.c')
| -rw-r--r-- | cpukit/score/cpu/unix/cpu.c | 529 |
1 files changed, 0 insertions, 529 deletions
diff --git a/cpukit/score/cpu/unix/cpu.c b/cpukit/score/cpu/unix/cpu.c deleted file mode 100644 index ed94953d58..0000000000 --- a/cpukit/score/cpu/unix/cpu.c +++ /dev/null @@ -1,529 +0,0 @@ -/* - * HP PA-RISC CPU Dependent Source - * - * - * To anyone who acknowledges that this file is provided "AS IS" - * without any express or implied warranty: - * permission to use, copy, modify, and distribute this file - * for any purpose is hereby granted without fee, provided that - * the above copyright notice and this notice appears in all - * copies, and that the name of Division Incorporated not be - * used in advertising or publicity pertaining to distribution - * of the software without specific, written prior permission. - * Division Incorporated makes no representations about the - * suitability of this software for any purpose. - * - * $Id$ - */ - -#include <rtems/system.h> -#include <rtems/fatal.h> -#include <rtems/isr.h> -#include <rtems/wkspace.h> -/* - * In order to get the types and prototypes used in this file under - * Solaris 2.3, it is necessary to pull the following magic. - */ - -#if defined(solaris) -#warning "Ignore the undefining __STDC__ warning" -#undef __STDC__ -#define __STDC__ 0 -#undef _POSIX_C_SOURCE -#endif - -#include <stdio.h> -#include <stdlib.h> -#include <unistd.h> -#include <string.h> -#include <signal.h> -#include <time.h> - -extern void set_vector(proc_ptr, int, int); -extern void _Thread_Dispatch(void); - -extern unsigned32 _Thread_Dispatch_disable_level; -extern unsigned32 _SYSTEM_ID; -extern boolean _Context_Switch_necessary; - - -rtems_status_code signal_initialize(void); -void Stray_signal(int); -void signal_enable(unsigned32); -void signal_disable(unsigned32); -void interrupt_handler(); - -sigset_t UNIX_SIGNAL_MASK; -jmp_buf default_context; - -/* - * Which cpu are we? Used by libcpu and libbsp. - */ - -int cpu_number; - -/* _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 */ -) -{ - unsigned32 i; - - if ( cpu_table == NULL ) - rtems_fatal_error_occurred( RTEMS_NOT_CONFIGURED ); - - /* - * 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; - -#if defined(hppa1_1) && defined(RTEMS_UNIXLIB) - /* - * HACK - set the _SYSTEM_ID to 0x20c so that setjmp/longjmp - * will handle the full 32 floating point registers. - * - * NOTE: Is this a bug in HPUX9? - */ - - _SYSTEM_ID = 0x20c; -#endif - - /* - * get default values to use in _CPU_Context_Initialize() - */ - - setjmp(default_context); - - /* - * Block all the signals except SIGTRAP for the debugger - * and SIGABRT for fatal errors. - */ - - _CPU_ISR_Set_signal_level(1); - - sigfillset(&UNIX_SIGNAL_MASK); - sigdelset(&UNIX_SIGNAL_MASK, SIGTRAP); - sigdelset(&UNIX_SIGNAL_MASK, SIGABRT); - sigdelset(&UNIX_SIGNAL_MASK, SIGIOT); - sigdelset(&UNIX_SIGNAL_MASK, SIGCONT); - - sigprocmask(SIG_BLOCK, &UNIX_SIGNAL_MASK, 0); - - /* - * 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 < 32; i++) - (void)set_vector(Stray_signal, i, 1); - - signal_initialize(); -} - -/* _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 _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_Internal_threads_Idle_thread_body - * - * NOTES: - * - * 1. This is the same as the regular CPU independent algorithm. - * - * 2. If you implement this using a "halt", "idle", or "shutdown" - * instruction, then don't forget to put it in an infinite loop. - * - * 3. Be warned. Some processors with onboard DMA have been known - * to stop the DMA if the CPU were put in IDLE mode. This might - * also be a problem with other on-chip peripherals. So use this - * hook with caution. - */ - -void _CPU_Internal_threads_Idle_thread_body( void ) -{ - while (1) - pause(); -} - -void _CPU_Context_Initialize( - Context_Control *_the_context, - unsigned32 *_stack_base, - unsigned32 _size, - unsigned32 _new_level, - proc_ptr *_entry_point -) -{ - unsigned32 *addr; - unsigned32 jmp_addr; - unsigned32 _stack; - unsigned32 _the_size; - - jmp_addr = (unsigned32) _entry_point; - - _stack = ((unsigned32)(_stack_base) + CPU_STACK_ALIGNMENT); - _stack &= ~(CPU_STACK_ALIGNMENT - 1); - - _the_size = _size & ~(CPU_STACK_ALIGNMENT - 1); - - /* - * Slam our jmp_buf template into the context we are creating - */ - - memcpy(_the_context, default_context, sizeof(jmp_buf)); - - addr = (unsigned32 *)_the_context; - -#if defined(hppa1_1) - *(addr + RP_OFF) = jmp_addr; - *(addr + SP_OFF) = (unsigned32)(_stack + 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 - * is at what 24 off of newp points to so shove that - * into 24 off of newp instead. - */ - - if (jmp_addr & 0x40000000) { - jmp_addr &= 0xfffffffc; - *(addr + RP_OFF) = (unsigned32)*(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 +_the_size - CPU_FRAME_SIZE); - *(addr + FP_OFF) = (unsigned32)(_stack +_the_size); -#else -#error "UNKNOWN CPU!!!" -#endif - - if (_new_level) - _CPU_ISR_Set_signal_level(1); - else - _CPU_ISR_Set_signal_level(0); - -} - -void _CPU_Context_restore( - Context_Control *next -) -{ - longjmp(next->regs, 0); -} - -void _CPU_Context_switch( - Context_Control *current, - Context_Control *next -) -{ - /* - * Save the current context - */ - - if (setjmp(current->regs) == 0) { - - /* - * Switch to the new context - */ - - longjmp(next->regs, 0); - } -} - -void _CPU_Save_float_context( - Context_Control_fp *fp_context -) -{ -} - -void _CPU_Restore_float_context( - Context_Control_fp *fp_context -) -{ -} - -void _CPU_ISR_Set_signal_level(unsigned32 level) -{ - if (level) - _CPU_Disable_signal(); - else - _CPU_Enable_signal(0); -} - - -unsigned32 _CPU_Disable_signal(void) -{ - sigset_t old_mask; - sigset_t empty_mask; - - sigemptyset(&empty_mask); - sigemptyset(&old_mask); - sigprocmask(SIG_BLOCK, &UNIX_SIGNAL_MASK, &old_mask); - - if (memcmp((char *)&empty_mask, (char *)&old_mask, sizeof(sigset_t)) != 0) - return 1; - - return 0; -} - - -void _CPU_Enable_signal(unsigned32 level) -{ - if (level == 0) - sigprocmask(SIG_UNBLOCK, &UNIX_SIGNAL_MASK, 0); -} - - -/* - * Support for external and spurious interrupts on HPPA - * - * TODO: - * delete interrupt.c etc. - * Count interrupts - * make sure interrupts disabled properly - * should handler check again for more interrupts before exit? - * How to enable interrupts from an interrupt handler? - * Make sure there is an entry for everything in ISR_Vector_Table - */ - -/* - * Init the external interrupt scheme - * called by bsp_start() - */ - -rtems_status_code -signal_initialize(void) -{ - struct sigaction act; - sigset_t mask; - - /* mark them all active except for TraceTrap and Abort */ - - sigfillset(&mask); - sigdelset(&mask, SIGTRAP); - sigdelset(&mask, SIGABRT); - sigdelset(&mask, SIGIOT); - sigdelset(&mask, SIGCONT); - sigprocmask(SIG_UNBLOCK, &mask, 0); - - act.sa_handler = interrupt_handler; - act.sa_mask = mask; -#if defined(solaris) - act.sa_flags = SA_RESTART; -#else - act.sa_flags = 0; -#endif - - sigaction(SIGHUP, &act, 0); - sigaction(SIGINT, &act, 0); - sigaction(SIGQUIT, &act, 0); - sigaction(SIGILL, &act, 0); - sigaction(SIGEMT, &act, 0); - sigaction(SIGFPE, &act, 0); - sigaction(SIGKILL, &act, 0); - sigaction(SIGBUS, &act, 0); - sigaction(SIGSEGV, &act, 0); - sigaction(SIGSYS, &act, 0); - sigaction(SIGPIPE, &act, 0); - sigaction(SIGALRM, &act, 0); - sigaction(SIGTERM, &act, 0); - sigaction(SIGUSR1, &act, 0); - sigaction(SIGUSR2, &act, 0); - sigaction(SIGCHLD, &act, 0); - sigaction(SIGCLD, &act, 0); - sigaction(SIGPWR, &act, 0); - 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); -/* - * XXX: Really should be on HPUX. - */ - -#if defined(hppa1_1) - sigaction(SIGLOST, &act, 0); -#endif - - return RTEMS_SUCCESSFUL; -} - - -/* - * External interrupt handler. - * This is installed as cpu interrupt handler. - * It vectors out to specific external interrupt handlers. - */ - -void -interrupt_handler(int vector) -{ - if (_ISR_Nest_level++ == 0) { - /* switch to interrupt stack */ - } - - _Thread_Dispatch_disable_level++; - - if (_ISR_Vector_table[vector]) { - _ISR_Vector_table[vector](vector); - } - else { - 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)) { - _CPU_Enable_signal(0); - _Thread_Dispatch(); - } -} - - -void -Stray_signal(int sig_num) -{ - char buffer[ 80 ]; - - /* - * We avoid using the stdio section of the library. - * The following is generally safe. - */ - - write( - 2, - buffer, - sprintf( buffer, "Stray signal %d\n", sig_num ) - ); - - /* - * 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 Stray_signal, so this is ok. - */ - - switch (sig_num) - { - case SIGINT: - case SIGHUP: - case SIGQUIT: - case SIGILL: - case SIGEMT: - case SIGKILL: - case SIGBUS: - case SIGSEGV: - case SIGTERM: - _CPU_Fatal_error(0x100 + sig_num); - } -} - - -void -_CPU_Fatal_error(unsigned32 error) -{ - setitimer(ITIMER_REAL, 0, 0); - - _exit(error); -} - -int -_CPU_ffs(unsigned32 value) -{ - int output; - - output = ffs(value); - output = output - 1; - - return(output); -} |