Mercurial > ecos
diff packages/hal/i386/linux/current/src/hal_startup.c @ 2:443894e2e912 ecos-v1_2_1-release
Block commit of eCos version 1.2.1
| author | jlarmour |
|---|---|
| date | Tue, 11 May 1999 12:24:34 +0000 |
| parents | |
| children | 7a6ac9edc838 |
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new file mode 100644 --- /dev/null +++ b/packages/hal/i386/linux/current/src/hal_startup.c @@ -0,0 +1,171 @@ +//============================================================================= +// +// hal_startup.c +// +// HAL bootstrap code +// +//============================================================================= +//####COPYRIGHTBEGIN#### +// +// ------------------------------------------- +// The contents of this file are subject to the Cygnus eCos Public License +// Version 1.0 (the "License"); you may not use this file except in +// compliance with the License. You may obtain a copy of the License at +// http://sourceware.cygnus.com/ecos +// +// Software distributed under the License is distributed on an "AS IS" +// basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the +// License for the specific language governing rights and limitations under +// the License. +// +// The Original Code is eCos - Embedded Cygnus Operating System, released +// October 31, 1998. +// +// The Initial Developer of the Original Code is Cygnus. Portions created +// by Cygnus are Copyright (C) 1998,1999 Cygnus Solutions. All Rights Reserved. +// ------------------------------------------- +// +//####COPYRIGHTEND#### +//============================================================================= +//#####DESCRIPTIONBEGIN#### +// +// Author(s): proven +// Contributors:proven, jskov +// Date: 1998-10-06 +// Purpose: HAL diagnostic output +// Description: Implementations of HAL diagnostic output support. +// +//####DESCRIPTIONEND#### +// +//============================================================================= + +#include <pkgconf/hal.h> + +#ifdef CYGPKG_KERNEL +#include <pkgconf/kernel.h> +#include <cyg/kernel/kapi.h> // cyg_scheduler_lock +#endif + +#include <cyg/hal/hal_intr.h> // interrupt stuff +#include <cyg/hal/hal_arch.h> // Architecture specific definitions + +#include <cyg/infra/diag.h> // diag_printf +#include <cyg/infra/cyg_ass.h> // ASSERTION macros + + +//---------------------------------------------------------------------------- +// ISR tables +volatile CYG_ADDRESS cyg_hal_interrupt_handlers[CYGNUM_HAL_ISR_COUNT]; +volatile CYG_ADDRWORD cyg_hal_interrupt_data[CYGNUM_HAL_ISR_COUNT]; +volatile CYG_ADDRESS cyg_hal_interrupt_objects[CYGNUM_HAL_ISR_COUNT]; + +// VSR table +volatile CYG_ADDRESS cyg_hal_vsr_table[CYGNUM_HAL_VSR_COUNT]; + +// Interrupts start disabled +volatile int cyg_hal_interrupts_disabled = 1; +volatile int cyg_hal_interrupts_deferred; +volatile int cyg_hal_interrupts_unhandled[CYGNUM_HAL_ISR_COUNT]; + +//----------------------------------------------------------------------------- + +typedef cyg_uint32 (*callsig_t)(int vector, cyg_uint32); + +externC void interrupt_end(CYG_ADDRESS, CYG_ADDRESS, CYG_ADDRESS); +extern volatile cyg_uint32 cyg_scheduler_sched_lock; + +externC void cyg_hal_default_interrupt_vsr(int vector) +{ + callsig_t func; + cyg_uint32 ret; + + if (cyg_hal_interrupts_disabled) { + cyg_hal_interrupts_unhandled[vector] = 1; + cyg_hal_interrupts_deferred = 1; + return; + } + +#ifdef CYGFUN_HAL_COMMON_KERNEL_SUPPORT + // Increment the scheduler lock when the kernel is present. + cyg_scheduler_sched_lock++; +#endif + + cyg_hal_interrupts_unhandled[vector] = 0; + func = (callsig_t) cyg_hal_interrupt_handlers[vector]; + ret = func(vector, cyg_hal_interrupt_data[vector]); + +#ifdef CYGFUN_HAL_COMMON_KERNEL_SUPPORT + // We only need to call _interrupt_end() when there is a kernel + // present to do any tidying up. + interrupt_end(ret, cyg_hal_interrupt_objects[vector], (CYG_ADDRESS) NULL); +#endif +} + +externC void cyg_hal_default_exception_vsr(int vector) +{ +#if defined(CYGFUN_HAL_COMMON_KERNEL_SUPPORT) && \ + defined(CYGPKG_HAL_EXCEPTIONS) + + { + int __pre_state = cyg_hal_interrupts_disabled++; + + cyg_hal_deliver_exception( vector, 0 ); + + cyg_hal_interrupts_disabled = __pre_state; + } + +#else + + CYG_FAIL("Exception!!!"); + +#endif +} + +//--------------------------------------------------------------------------- +// Default ISR + +externC cyg_uint32 +cyg_hal_default_isr(CYG_ADDRWORD vector, CYG_ADDRWORD data) +{ + diag_printf("Interrupt: %d\n", vector); + + CYG_FAIL("Spurious Interrupt!!!"); + return 0; +} + +//----------------------------------------------------------------------------- +// Initialization on the VSRs. +struct hal_sigaction { + void (*hal_handler)(int); + long hal_mask; + int hal_flags; + void (*hal_bogus)(int); +} act, oact; +extern int cyg_hal_sys_sigaction(int, const struct hal_sigaction*, + struct hal_sigaction*); +externC void cyg_hal_isr_init(void) +{ + int i; + + // ISR setup + for (i = 0; i < CYGNUM_HAL_ISR_COUNT; i++) { + cyg_hal_interrupt_handlers[i] = (CYG_ADDRESS) &cyg_hal_default_isr; + } + + // Interrupt VSR setup + act.hal_handler = cyg_hal_default_interrupt_vsr; + act.hal_mask = 0; + act.hal_flags = 0; + cyg_hal_sys_sigaction(CYGNUM_HAL_INTERRUPT_RTC, &act, &oact); + + // Exception VSR setup + act.hal_handler = cyg_hal_default_exception_vsr; + act.hal_mask = 0; + act.hal_flags = 0; + cyg_hal_sys_sigaction(CYGNUM_HAL_VECTOR_SIGSEGV, &act, &oact); + cyg_hal_sys_sigaction(CYGNUM_HAL_VECTOR_SIGBUS, &act, &oact); + cyg_hal_sys_sigaction(CYGNUM_HAL_VECTOR_SIGFPE, &act, &oact); +} + +//----------------------------------------------------------------------------- +// End of hal_startup.c
