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[/] [openrisc/] [trunk/] [rtos/] [ecos-3.0/] [packages/] [hal/] [v85x/] [arch/] [current/] [src/] [hal_misc.c] - Rev 811
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/*========================================================================== // // hal_misc.c // // HAL miscellaneous functions // //========================================================================== // ####ECOSGPLCOPYRIGHTBEGIN#### // ------------------------------------------- // This file is part of eCos, the Embedded Configurable Operating System. // Copyright (C) 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc. // // eCos is free software; you can redistribute it and/or modify it under // the terms of the GNU General Public License as published by the Free // Software Foundation; either version 2 or (at your option) any later // version. // // eCos is distributed in the hope that it will be useful, but WITHOUT // ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License // for more details. // // You should have received a copy of the GNU General Public License // along with eCos; if not, write to the Free Software Foundation, Inc., // 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. // // As a special exception, if other files instantiate templates or use // macros or inline functions from this file, or you compile this file // and link it with other works to produce a work based on this file, // this file does not by itself cause the resulting work to be covered by // the GNU General Public License. However the source code for this file // must still be made available in accordance with section (3) of the GNU // General Public License v2. // // This exception does not invalidate any other reasons why a work based // on this file might be covered by the GNU General Public License. // ------------------------------------------- // ####ECOSGPLCOPYRIGHTEND#### //========================================================================== //#####DESCRIPTIONBEGIN#### // // Author(s): nickg, gthomas // Contributors: nickg, gthomas, jlarmour // Date: 2001-03-21 // Purpose: HAL miscellaneous functions // Description: This file contains miscellaneous functions provided by the // HAL. // //####DESCRIPTIONEND#### // //=========================================================================*/ #include <pkgconf/hal.h> #include <pkgconf/hal_v85x.h> #ifdef CYGPKG_KERNEL #include <pkgconf/kernel.h> #endif #include <cyg/infra/cyg_type.h> #include <cyg/infra/cyg_trac.h> // tracing macros #include <cyg/infra/cyg_ass.h> // assertion macros #include <cyg/infra/diag.h> #include <cyg/hal/hal_arch.h> // HAL header #include <cyg/hal/hal_intr.h> // HAL header /*------------------------------------------------------------------------*/ /* First level C exception handler. */ externC void __handle_exception (void); externC HAL_SavedRegisters *_hal_registers; void exception_handler(HAL_SavedRegisters *regs) { #if defined(CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS) // diag_printf("Exception! Frame: %x\n", regs); // show_regs(regs); static int gdb_active; if (gdb_active == 0) { gdb_active = 1; _hal_registers = regs; __handle_exception(); gdb_active = 0; } #elif defined(CYGPKG_KERNEL_EXCEPTIONS) // We should decode the vector and pass a more appropriate // value as the second argument. For now we simply pass a // pointer to the saved registers. We should also divert // breakpoint and other debug vectors into the debug stubs. cyg_hal_deliver_exception( regs->vector, (CYG_ADDRWORD)regs ); #else CYG_FAIL("Exception!!!"); #endif return; } /*------------------------------------------------------------------------*/ /* C++ support - run initial constructors */ #ifdef CYGSEM_HAL_STOP_CONSTRUCTORS_ON_FLAG cyg_bool cyg_hal_stop_constructors; #endif typedef void (*pfunc) (void); extern pfunc __CTOR_LIST__[]; extern pfunc __CTOR_END__[]; void cyg_hal_invoke_constructors (void) { #ifdef CYGSEM_HAL_STOP_CONSTRUCTORS_ON_FLAG static pfunc *p = &__CTOR_END__[-1]; cyg_hal_stop_constructors = 0; for (; p >= __CTOR_LIST__; p--) { (*p) (); if (cyg_hal_stop_constructors) { p--; break; } } #else pfunc *p; for (p = &__CTOR_END__[-1]; p >= __CTOR_LIST__; p--) { (*p) (); } #endif } /*------------------------------------------------------------------------*/ /* default ISR */ #ifdef CYGSEM_HAL_VIRTUAL_VECTOR_SUPPORT externC cyg_uint32 hal_arch_default_isr(CYG_ADDRWORD vector, CYG_ADDRWORD data) { CYG_TRACE1(true, "Interrupt: %d", vector); diag_printf("Spurious Interrupt!!! - vector: %d, data: %x\n", vector, data); CYG_FAIL("Spurious Interrupt!!!"); return 0; } #else externC cyg_uint32 hal_default_isr(CYG_ADDRWORD vector, CYG_ADDRWORD data) { CYG_TRACE1(true, "Interrupt: %d", vector); #ifndef CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS #ifdef CYGDBG_HAL_DEBUG_GDB_CTRLC_SUPPORT #ifdef CYGDBG_HAL_CTRLC_ISR // then see if it is an incoming character interrupt and break // into the stub ROM if the char is a ^C. if ( CYGDBG_HAL_CTRLC_ISR( vector, data ) ) return 1; // interrupt handled #endif #endif #endif diag_printf("Spurious Interrupt!!! - vector: %d, data: %x\n", vector, data); CYG_FAIL("Spurious Interrupt!!!"); return 0; } #endif /*------------------------------------------------------------------------*/ /* Idle thread action */ void hal_idle_thread_action( cyg_uint32 count ) { // power saving instruction asm("halt"); } /*-------------------------------------------------------------------------*/ /* Misc functions */ cyg_uint32 hal_lsbit_index(cyg_uint32 mask) { int i; for (i = 0; i < 32; i++) { if (mask & (1<<i)) return ((cyg_uint32)i); } return ((cyg_uint32)-1); } cyg_uint32 hal_msbit_index(cyg_uint32 mask) { int i; for (i = 31; i >= 0; i--) { if (mask & (1<<i)) return ((cyg_uint32)i); } return ((cyg_uint32)-1); } void show_regs(HAL_SavedRegisters *regs) { int i; diag_printf("Regs\n"); for (i = 0; i < 32; i++) { if ((i % 8) == 0) { diag_printf("R%2d: ", i); } diag_printf("0x%08x ", regs->d[i]); if ((i % 8) == 7) { diag_printf("\n"); } } diag_printf("PC = %x, PSW = %x\n", regs->pc, regs->psw); } /*------------------------------------------------------------------------*/ // EOF hal_misc.c
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