diff options
Diffstat (limited to 'arch/frv/kernel/gdb-io.c')
| -rw-r--r-- | arch/frv/kernel/gdb-io.c | 215 |
1 files changed, 0 insertions, 215 deletions
diff --git a/arch/frv/kernel/gdb-io.c b/arch/frv/kernel/gdb-io.c deleted file mode 100644 index 0707d35..0000000 --- a/arch/frv/kernel/gdb-io.c +++ /dev/null @@ -1,215 +0,0 @@ -/* gdb-io.c: FR403 GDB stub I/O - * - * Copyright (C) 2003 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 License - * as published by the Free Software Foundation; either version - * 2 of the License, 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/serial_reg.h> - -#include <asm/pgtable.h> -#include <asm/irc-regs.h> -#include <asm/timer-regs.h> -#include <asm/gdb-stub.h> -#include "gdb-io.h" - -#ifdef CONFIG_GDBSTUB_UART0 -#define __UART(X) (*(volatile uint8_t *)(UART0_BASE + (UART_##X))) -#define __UART_IRR_NMI 0xff0f0000 -#else /* CONFIG_GDBSTUB_UART1 */ -#define __UART(X) (*(volatile uint8_t *)(UART1_BASE + (UART_##X))) -#define __UART_IRR_NMI 0xfff00000 -#endif - -#define LSR_WAIT_FOR(STATE) \ -do { \ - gdbstub_do_rx(); \ -} while (!(__UART(LSR) & UART_LSR_##STATE)) - -#define FLOWCTL_QUERY(LINE) ({ __UART(MSR) & UART_MSR_##LINE; }) -#define FLOWCTL_CLEAR(LINE) do { __UART(MCR) &= ~UART_MCR_##LINE; mb(); } while (0) -#define FLOWCTL_SET(LINE) do { __UART(MCR) |= UART_MCR_##LINE; mb(); } while (0) - -#define FLOWCTL_WAIT_FOR(LINE) \ -do { \ - gdbstub_do_rx(); \ -} while(!FLOWCTL_QUERY(LINE)) - -/*****************************************************************************/ -/* - * initialise the GDB stub - * - called with PSR.ET==0, so can't incur external interrupts - */ -void gdbstub_io_init(void) -{ - /* set up the serial port */ - __UART(LCR) = UART_LCR_WLEN8; /* 1N8 */ - __UART(FCR) = - UART_FCR_ENABLE_FIFO | - UART_FCR_CLEAR_RCVR | - UART_FCR_CLEAR_XMIT | - UART_FCR_TRIGGER_1; - - FLOWCTL_CLEAR(DTR); - FLOWCTL_SET(RTS); - -// gdbstub_set_baud(115200); - - /* we want to get serial receive interrupts */ - __UART(IER) = UART_IER_RDI | UART_IER_RLSI; - mb(); - - __set_IRR(6, __UART_IRR_NMI); /* map ERRs and UARTx to NMI */ - -} /* end gdbstub_io_init() */ - -/*****************************************************************************/ -/* - * set up the GDB stub serial port baud rate timers - */ -void gdbstub_set_baud(unsigned baud) -{ - unsigned value, high, low; - u8 lcr; - - /* work out the divisor to give us the nearest higher baud rate */ - value = __serial_clock_speed_HZ / 16 / baud; - - /* determine the baud rate range */ - high = __serial_clock_speed_HZ / 16 / value; - low = __serial_clock_speed_HZ / 16 / (value + 1); - - /* pick the nearest bound */ - if (low + (high - low) / 2 > baud) - value++; - - lcr = __UART(LCR); - __UART(LCR) |= UART_LCR_DLAB; - mb(); - __UART(DLL) = value & 0xff; - __UART(DLM) = (value >> 8) & 0xff; - mb(); - __UART(LCR) = lcr; - mb(); - -} /* end gdbstub_set_baud() */ - -/*****************************************************************************/ -/* - * receive characters into the receive FIFO - */ -void gdbstub_do_rx(void) -{ - unsigned ix, nix; - - ix = gdbstub_rx_inp; - - while (__UART(LSR) & UART_LSR_DR) { - nix = (ix + 2) & 0xfff; - if (nix == gdbstub_rx_outp) - break; - - gdbstub_rx_buffer[ix++] = __UART(LSR); - gdbstub_rx_buffer[ix++] = __UART(RX); - ix = nix; - } - - gdbstub_rx_inp = ix; - - __clr_RC(15); - __clr_IRL(); - -} /* end gdbstub_do_rx() */ - -/*****************************************************************************/ -/* - * wait for a character to come from the debugger - */ -int gdbstub_rx_char(unsigned char *_ch, int nonblock) -{ - unsigned ix; - u8 ch, st; - - *_ch = 0xff; - - if (gdbstub_rx_unget) { - *_ch = gdbstub_rx_unget; - gdbstub_rx_unget = 0; - return 0; - } - - try_again: - gdbstub_do_rx(); - - /* pull chars out of the buffer */ - ix = gdbstub_rx_outp; - if (ix == gdbstub_rx_inp) { - if (nonblock) - return -EAGAIN; - //watchdog_alert_counter = 0; - goto try_again; - } - - st = gdbstub_rx_buffer[ix++]; - ch = gdbstub_rx_buffer[ix++]; - 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_io("### GDB Rx Error (st=%02x) ###\n",st); - return -EIO; - } - else { - gdbstub_io("### GDB Rx %02x (st=%02x) ###\n",ch,st); - *_ch = ch & 0x7f; - return 0; - } - -} /* end gdbstub_rx_char() */ - -/*****************************************************************************/ -/* - * send a character to the debugger - */ -void gdbstub_tx_char(unsigned char ch) -{ - FLOWCTL_SET(DTR); - LSR_WAIT_FOR(THRE); -// FLOWCTL_WAIT_FOR(CTS); - - if (ch == 0x0a) { - __UART(TX) = 0x0d; - mb(); - LSR_WAIT_FOR(THRE); -// FLOWCTL_WAIT_FOR(CTS); - } - __UART(TX) = ch; - mb(); - - FLOWCTL_CLEAR(DTR); -} /* end gdbstub_tx_char() */ - -/*****************************************************************************/ -/* - * send a character to the debugger - */ -void gdbstub_tx_flush(void) -{ - LSR_WAIT_FOR(TEMT); - LSR_WAIT_FOR(THRE); - FLOWCTL_CLEAR(DTR); -} /* end gdbstub_tx_flush() */ |
