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[/] [openrisc/] [trunk/] [rtos/] [ecos-2.0/] [packages/] [hal/] [mn10300/] [stb/] [v2_0/] [src/] [plf_stub.c] - Rev 565
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//============================================================================= // // plf_stub.c // // Platform specific code for GDB stub support. // //============================================================================= //####ECOSGPLCOPYRIGHTBEGIN#### // ------------------------------------------- // This file is part of eCos, the Embedded Configurable Operating System. // Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, 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., // 59 Temple Place, Suite 330, Boston, MA 02111-1307 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. // // This exception does not invalidate any other reasons why a work based on // this file might be covered by the GNU General Public License. // // Alternative licenses for eCos may be arranged by contacting Red Hat, Inc. // at http://sources.redhat.com/ecos/ecos-license/ // ------------------------------------------- //####ECOSGPLCOPYRIGHTEND#### //============================================================================= //#####DESCRIPTIONBEGIN#### // // Author(s): nickg, jskov (based on the old mn10300 hal_stub.c) // Contributors:nickg, jskov, dhowells // Date: 1999-02-12 // Purpose: Platform specific code for GDB stub support. // //####DESCRIPTIONEND#### // //============================================================================= #include <pkgconf/hal.h> #ifdef CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS #include <cyg/hal/hal_stub.h> #include <cyg/hal/hal_io.h> // HAL IO macros #include <cyg/hal/hal_intr.h> // HAL interrupt macros //--------------------------------------------------------------------------- // MN10300 Serial line // We use serial0 on AM33 #define SERIAL0_CR ((volatile cyg_uint16 *)0xd4002000) #define SERIAL0_ICR ((volatile cyg_uint8 *) 0xd4002004) #define SERIAL0_TXR ((volatile cyg_uint8 *) 0xd4002008) #define SERIAL0_RXR ((volatile cyg_uint8 *) 0xd4002009) #define SERIAL0_SR ((volatile cyg_uint16 *)0xd400200c) // Timer 2 provides baud rate divisor #define TIMER0_MD ((volatile cyg_uint8 *)0xd4003002) #define TIMER0_BR ((volatile cyg_uint8 *)0xd4003012) #define TIMER0_CR ((volatile cyg_uint8 *)0xd4003022) #define SIO1_LSTAT_TRDY 0x20 #define SIO1_LSTAT_RRDY 0x10 //--------------------------------------------------------------------------- #ifdef CYGDBG_HAL_DEBUG_GDB_BREAK_SUPPORT // This ISR is called from the interrupt handler. This should only // happen when there is no serial driver, so the code shouldn't mess // anything up. int cyg_hal_gdb_isr(cyg_uint32 vector, target_register_t pc) { if ( CYGNUM_HAL_INTERRUPT_SERIAL_0_RX == vector ) { cyg_uint8 c; HAL_READ_UINT8 (SERIAL0_RXR, c); HAL_INTERRUPT_ACKNOWLEDGE (CYGNUM_HAL_INTERRUPT_SERIAL_0_RX); if( 3 == c ) { // Ctrl-C: set a breakpoint at PC so GDB will display the // correct program context when stopping rather than the // interrupt handler. cyg_hal_gdb_interrupt (pc); // Interrupt handled. Don't call ISR proper. At return // from the VSR, execution will stop at the breakpoint // just set. return 0; } } // Not caused by GDB. Call ISR proper. return 1; } int hal_stb_interruptible(int state) { if (state) { HAL_WRITE_UINT8 (SERIAL0_ICR, 0); HAL_INTERRUPT_ACKNOWLEDGE (CYGNUM_HAL_INTERRUPT_SERIAL_0_RX) HAL_INTERRUPT_UNMASK (CYGNUM_HAL_INTERRUPT_SERIAL_0_RX) } else { HAL_INTERRUPT_MASK (CYGNUM_HAL_INTERRUPT_SERIAL_0_RX) } return 0; } void hal_stb_init_break_irq( void ) { // Enable serial receive interrupts. HAL_WRITE_UINT8 (SERIAL0_ICR, 0); HAL_INTERRUPT_ACKNOWLEDGE (CYGNUM_HAL_INTERRUPT_SERIAL_0_RX) HAL_INTERRUPT_UNMASK (CYGNUM_HAL_INTERRUPT_SERIAL_0_RX) HAL_ENABLE_INTERRUPTS(); } #endif //----------------------------------------------------------------------------- void hal_stb_platform_init(void) { extern CYG_ADDRESS hal_virtual_vector_table[64]; extern void init_thread_syscall( void *); extern void install_async_breakpoint(void *epc); // void (*oldvsr)(void); extern void __default_exception_vsr(void); // Ensure that the breakpoint VSR points to the default VSR. This will pass // it on to the stubs. // HAL_VSR_SET( CYGNUM_HAL_VECTOR_BREAKPOINT, __default_exception_vsr, &oldvsr ); // Install async breakpoint handler into vector table. hal_virtual_vector_table[35] = (CYG_ADDRESS)install_async_breakpoint; #if !defined(CYGPKG_KERNEL) && defined(CYGDBG_HAL_DEBUG_GDB_THREAD_SUPPORT) // Only include this code if we do not have a kernel. Otherwise // the kernel supplies the functionality for the app we are linked // with. // Prepare for application installation of thread info function in // vector table. hal_virtual_vector_table[15] = 0; init_thread_syscall( (void *)&hal_virtual_vector_table[15] ); #endif } #endif // ifdef CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS //----------------------------------------------------------------------------- // End of plf_stub.c
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