diff options
Diffstat (limited to 'arch/mn10300/kernel/gdb-io-serial.c')
| -rw-r--r-- | arch/mn10300/kernel/gdb-io-serial.c | 174 |
1 files changed, 0 insertions, 174 deletions
diff --git a/arch/mn10300/kernel/gdb-io-serial.c b/arch/mn10300/kernel/gdb-io-serial.c deleted file mode 100644 index df51242744cc..000000000000 --- a/arch/mn10300/kernel/gdb-io-serial.c +++ /dev/null @@ -1,174 +0,0 @@ -/* 16550 serial driver for gdbstub I/O - * - * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved. - * Written by David Howells (dhowells@redhat.com) - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public Licence - * as published by the Free Software Foundation; either version - * 2 of the Licence, or (at your option) any later version. - */ -#include <linux/string.h> -#include <linux/kernel.h> -#include <linux/signal.h> -#include <linux/sched.h> -#include <linux/mm.h> -#include <linux/console.h> -#include <linux/init.h> -#include <linux/nmi.h> - -#include <asm/pgtable.h> -#include <asm/gdb-stub.h> -#include <asm/exceptions.h> -#include <asm/serial-regs.h> -#include <unit/serial.h> -#include <asm/smp.h> - -/* - * initialise the GDB stub - */ -void gdbstub_io_init(void) -{ - u16 tmp; - - /* set up the serial port */ - GDBPORT_SERIAL_LCR = UART_LCR_WLEN8; /* 1N8 */ - GDBPORT_SERIAL_FCR = (UART_FCR_ENABLE_FIFO | UART_FCR_CLEAR_RCVR | - UART_FCR_CLEAR_XMIT); - - FLOWCTL_CLEAR(DTR); - FLOWCTL_SET(RTS); - - gdbstub_io_set_baud(115200); - - /* we want to get serial receive interrupts */ - XIRQxICR(GDBPORT_SERIAL_IRQ) = 0; - tmp = XIRQxICR(GDBPORT_SERIAL_IRQ); - -#if CONFIG_GDBSTUB_IRQ_LEVEL == 0 - IVAR0 = EXCEP_IRQ_LEVEL0; -#elif CONFIG_GDBSTUB_IRQ_LEVEL == 1 - IVAR1 = EXCEP_IRQ_LEVEL1; -#elif CONFIG_GDBSTUB_IRQ_LEVEL == 2 - IVAR2 = EXCEP_IRQ_LEVEL2; -#elif CONFIG_GDBSTUB_IRQ_LEVEL == 3 - IVAR3 = EXCEP_IRQ_LEVEL3; -#elif CONFIG_GDBSTUB_IRQ_LEVEL == 4 - IVAR4 = EXCEP_IRQ_LEVEL4; -#elif CONFIG_GDBSTUB_IRQ_LEVEL == 5 - IVAR5 = EXCEP_IRQ_LEVEL5; -#else -#error "Unknown irq level for gdbstub." -#endif - - set_intr_stub(NUM2EXCEP_IRQ_LEVEL(CONFIG_GDBSTUB_IRQ_LEVEL), - gdbstub_io_rx_handler); - - XIRQxICR(GDBPORT_SERIAL_IRQ) &= ~GxICR_REQUEST; - XIRQxICR(GDBPORT_SERIAL_IRQ) = - GxICR_ENABLE | NUM2GxICR_LEVEL(CONFIG_GDBSTUB_IRQ_LEVEL); - tmp = XIRQxICR(GDBPORT_SERIAL_IRQ); - - GDBPORT_SERIAL_IER = UART_IER_RDI | UART_IER_RLSI; - - /* permit level 0 IRQs to take place */ - arch_local_change_intr_mask_level( - NUM2EPSW_IM(CONFIG_GDBSTUB_IRQ_LEVEL + 1)); -} - -/* - * set up the GDB stub serial port baud rate timers - */ -void gdbstub_io_set_baud(unsigned baud) -{ - unsigned value; - u8 lcr; - - value = 18432000 / 16 / baud; - - lcr = GDBPORT_SERIAL_LCR; - GDBPORT_SERIAL_LCR |= UART_LCR_DLAB; - GDBPORT_SERIAL_DLL = value & 0xff; - GDBPORT_SERIAL_DLM = (value >> 8) & 0xff; - GDBPORT_SERIAL_LCR = lcr; -} - -/* - * wait for a character to come from the debugger - */ -int gdbstub_io_rx_char(unsigned char *_ch, int nonblock) -{ - unsigned ix; - u8 ch, st; -#if defined(CONFIG_MN10300_WD_TIMER) - int cpu; -#endif - - *_ch = 0xff; - - if (gdbstub_rx_unget) { - *_ch = gdbstub_rx_unget; - gdbstub_rx_unget = 0; - return 0; - } - - try_again: - /* pull chars out of the buffer */ - ix = gdbstub_rx_outp; - barrier(); - if (ix == gdbstub_rx_inp) { - if (nonblock) - return -EAGAIN; -#ifdef CONFIG_MN10300_WD_TIMER - for (cpu = 0; cpu < NR_CPUS; cpu++) - watchdog_alert_counter[cpu] = 0; -#endif - goto try_again; - } - - ch = gdbstub_rx_buffer[ix++]; - st = gdbstub_rx_buffer[ix++]; - barrier(); - gdbstub_rx_outp = ix & 0x00000fff; - - if (st & UART_LSR_BI) { - gdbstub_proto("### GDB Rx Break Detected ###\n"); - return -EINTR; - } else if (st & (UART_LSR_FE | UART_LSR_OE | UART_LSR_PE)) { - gdbstub_proto("### GDB Rx Error (st=%02x) ###\n", st); - return -EIO; - } else { - gdbstub_proto("### GDB Rx %02x (st=%02x) ###\n", ch, st); - *_ch = ch & 0x7f; - return 0; - } -} - -/* - * send a character to the debugger - */ -void gdbstub_io_tx_char(unsigned char ch) -{ - FLOWCTL_SET(DTR); - LSR_WAIT_FOR(THRE); - /* FLOWCTL_WAIT_FOR(CTS); */ - - if (ch == 0x0a) { - GDBPORT_SERIAL_TX = 0x0d; - LSR_WAIT_FOR(THRE); - /* FLOWCTL_WAIT_FOR(CTS); */ - } - GDBPORT_SERIAL_TX = ch; - - FLOWCTL_CLEAR(DTR); -} - -/* - * send a character to the debugger - */ -void gdbstub_io_tx_flush(void) -{ - LSR_WAIT_FOR(TEMT); - LSR_WAIT_FOR(THRE); - FLOWCTL_CLEAR(DTR); -} |