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[/] [openrisc/] [trunk/] [rtos/] [ecos-2.0/] [packages/] [hal/] [mn10300/] [stdeval1/] [v2_0/] [src/] [plf_stub.c] - Rev 174
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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 // 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 serial1 on MN103002 #define SERIAL1_CR ((volatile cyg_uint16 *)0x34000810) #define SERIAL1_ICR ((volatile cyg_uint8 *) 0x34000814) #define SERIAL1_TXR ((volatile cyg_uint8 *) 0x34000818) #define SERIAL1_RXR ((volatile cyg_uint8 *) 0x34000819) #define SERIAL1_SR ((volatile cyg_uint16 *)0x3400081c) // Timer 1 provided baud rate divisor #define TIMER1_MD ((volatile cyg_uint8 *)0x34001001) #define TIMER1_BR ((volatile cyg_uint8 *)0x34001011) #define TIMER1_CR ((volatile cyg_uint8 *)0x34001021) #define PORT3_MD ((volatile cyg_uint8 *)0x36008025) // Mystery register #define TMPSCNT ((volatile cyg_uint8 *)0x34001071) #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_1_RX == vector ) { cyg_uint8 c; HAL_READ_UINT8 (SERIAL1_RXR, c); HAL_INTERRUPT_ACKNOWLEDGE (CYGNUM_HAL_INTERRUPT_SERIAL_1_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_stdeval1_interruptible(int state) { if (state) { HAL_WRITE_UINT8 (SERIAL1_ICR, 0); HAL_INTERRUPT_ACKNOWLEDGE (CYGNUM_HAL_INTERRUPT_SERIAL_1_RX) HAL_INTERRUPT_UNMASK (CYGNUM_HAL_INTERRUPT_SERIAL_1_RX) } else { HAL_INTERRUPT_MASK (CYGNUM_HAL_INTERRUPT_SERIAL_1_RX) } return 0; } void hal_stdeval1_init_break_irq( void ) { // Enable serial receive interrupts. HAL_WRITE_UINT8 (SERIAL1_ICR, 0); HAL_INTERRUPT_ACKNOWLEDGE (CYGNUM_HAL_INTERRUPT_SERIAL_1_RX) HAL_INTERRUPT_UNMASK (CYGNUM_HAL_INTERRUPT_SERIAL_1_RX) HAL_ENABLE_INTERRUPTS(); } #endif // Initialize the current serial port. void hal_stdeval1_init_serial( void ) { // 48 translates to 38400 baud. HAL_WRITE_UINT8 (TIMER1_BR, 48); // Timer1 sourced from IOCLK HAL_WRITE_UINT8 (TIMER1_MD, 0x80); // Mode on PORT3, used for serial line controls. HAL_WRITE_UINT8 (PORT3_MD, 0x01); // No interrupts for now. HAL_WRITE_UINT8 (SERIAL1_ICR, 0x00); // Source from timer 1, 8bit chars, enable tx and rx HAL_WRITE_UINT16 (SERIAL1_CR, 0xc084); } // Write C to the current serial port. void hal_stdeval1_put_char( int c ) { cyg_uint16 sr; do { HAL_READ_UINT16 (SERIAL1_SR, sr); } while ((sr & SIO1_LSTAT_TRDY) != 0); HAL_WRITE_UINT8 (SERIAL1_TXR, c); } // Read one character from the current serial port. int hal_stdeval1_get_char( void ) { char c; cyg_uint16 sr; do { HAL_READ_UINT16 (SERIAL1_SR, sr); } while ((sr & SIO1_LSTAT_RRDY) == 0); HAL_READ_UINT8 (SERIAL1_RXR, c); return c; } #endif // ifdef CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS //----------------------------------------------------------------------------- // End of plf_stub.c