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Diffstat (limited to 'arch/mn10300/kernel/gdb-io-ttysm.c')
-rw-r--r--arch/mn10300/kernel/gdb-io-ttysm.c303
1 files changed, 0 insertions, 303 deletions
diff --git a/arch/mn10300/kernel/gdb-io-ttysm.c b/arch/mn10300/kernel/gdb-io-ttysm.c
deleted file mode 100644
index caae8cac9db1..000000000000
--- a/arch/mn10300/kernel/gdb-io-ttysm.c
+++ /dev/null
@@ -1,303 +0,0 @@
-/* MN10300 On-chip 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/tty.h>
-#include <asm/pgtable.h>
-#include <asm/gdb-stub.h>
-#include <asm/exceptions.h>
-#include <unit/clock.h>
-#include "mn10300-serial.h"
-
-#if defined(CONFIG_GDBSTUB_ON_TTYSM0)
-struct mn10300_serial_port *const gdbstub_port = &mn10300_serial_port_sif0;
-#elif defined(CONFIG_GDBSTUB_ON_TTYSM1)
-struct mn10300_serial_port *const gdbstub_port = &mn10300_serial_port_sif1;
-#else
-struct mn10300_serial_port *const gdbstub_port = &mn10300_serial_port_sif2;
-#endif
-
-
-/*
- * initialise the GDB stub I/O routines
- */
-void __init gdbstub_io_init(void)
-{
- uint16_t scxctr;
- int tmp;
-
- switch (gdbstub_port->clock_src) {
- case MNSCx_CLOCK_SRC_IOCLK:
- gdbstub_port->ioclk = MN10300_IOCLK;
- break;
-
-#ifdef MN10300_IOBCLK
- case MNSCx_CLOCK_SRC_IOBCLK:
- gdbstub_port->ioclk = MN10300_IOBCLK;
- break;
-#endif
- default:
- BUG();
- }
-
- /* set up the serial port */
- gdbstub_io_set_baud(115200);
-
- /* we want to get serial receive interrupts */
- set_intr_level(gdbstub_port->rx_irq,
- NUM2GxICR_LEVEL(CONFIG_DEBUGGER_IRQ_LEVEL));
- set_intr_level(gdbstub_port->tx_irq,
- NUM2GxICR_LEVEL(CONFIG_DEBUGGER_IRQ_LEVEL));
- set_intr_stub(NUM2EXCEP_IRQ_LEVEL(CONFIG_DEBUGGER_IRQ_LEVEL),
- gdbstub_io_rx_handler);
-
- *gdbstub_port->rx_icr |= GxICR_ENABLE;
- tmp = *gdbstub_port->rx_icr;
-
- /* enable the device */
- scxctr = SC01CTR_CLN_8BIT; /* 1N8 */
- switch (gdbstub_port->div_timer) {
- case MNSCx_DIV_TIMER_16BIT:
- scxctr |= SC0CTR_CK_TM8UFLOW_8; /* == SC1CTR_CK_TM9UFLOW_8
- == SC2CTR_CK_TM10UFLOW_8 */
- break;
-
- case MNSCx_DIV_TIMER_8BIT:
- scxctr |= SC0CTR_CK_TM2UFLOW_8;
- break;
- }
-
- scxctr |= SC01CTR_TXE | SC01CTR_RXE;
-
- *gdbstub_port->_control = scxctr;
- tmp = *gdbstub_port->_control;
-
- /* permit level 0 IRQs only */
- arch_local_change_intr_mask_level(
- NUM2EPSW_IM(CONFIG_DEBUGGER_IRQ_LEVEL + 1));
-}
-
-/*
- * set up the GDB stub serial port baud rate timers
- */
-void gdbstub_io_set_baud(unsigned baud)
-{
- const unsigned bits = 10; /* 1 [start] + 8 [data] + 0 [parity] +
- * 1 [stop] */
- unsigned long ioclk = gdbstub_port->ioclk;
- unsigned xdiv, tmp;
- uint16_t tmxbr;
- uint8_t tmxmd;
-
- if (!baud) {
- baud = 9600;
- } else if (baud == 134) {
- baud = 269; /* 134 is really 134.5 */
- xdiv = 2;
- }
-
-try_alternative:
- xdiv = 1;
-
- switch (gdbstub_port->div_timer) {
- case MNSCx_DIV_TIMER_16BIT:
- tmxmd = TM8MD_SRC_IOCLK;
- tmxbr = tmp = (ioclk / (baud * xdiv) + 4) / 8 - 1;
- if (tmp > 0 && tmp <= 65535)
- goto timer_okay;
-
- tmxmd = TM8MD_SRC_IOCLK_8;
- tmxbr = tmp = (ioclk / (baud * 8 * xdiv) + 4) / 8 - 1;
- if (tmp > 0 && tmp <= 65535)
- goto timer_okay;
-
- tmxmd = TM8MD_SRC_IOCLK_32;
- tmxbr = tmp = (ioclk / (baud * 32 * xdiv) + 4) / 8 - 1;
- if (tmp > 0 && tmp <= 65535)
- goto timer_okay;
-
- break;
-
- case MNSCx_DIV_TIMER_8BIT:
- tmxmd = TM2MD_SRC_IOCLK;
- tmxbr = tmp = (ioclk / (baud * xdiv) + 4) / 8 - 1;
- if (tmp > 0 && tmp <= 255)
- goto timer_okay;
-
- tmxmd = TM2MD_SRC_IOCLK_8;
- tmxbr = tmp = (ioclk / (baud * 8 * xdiv) + 4) / 8 - 1;
- if (tmp > 0 && tmp <= 255)
- goto timer_okay;
-
- tmxmd = TM2MD_SRC_IOCLK_32;
- tmxbr = tmp = (ioclk / (baud * 32 * xdiv) + 4) / 8 - 1;
- if (tmp > 0 && tmp <= 255)
- goto timer_okay;
- break;
- }
-
- /* as a last resort, if the quotient is zero, default to 9600 bps */
- baud = 9600;
- goto try_alternative;
-
-timer_okay:
- gdbstub_port->uart.timeout = (2 * bits * HZ) / baud;
- gdbstub_port->uart.timeout += HZ / 50;
-
- /* set the timer to produce the required baud rate */
- switch (gdbstub_port->div_timer) {
- case MNSCx_DIV_TIMER_16BIT:
- *gdbstub_port->_tmxmd = 0;
- *gdbstub_port->_tmxbr = tmxbr;
- *gdbstub_port->_tmxmd = TM8MD_INIT_COUNTER;
- *gdbstub_port->_tmxmd = tmxmd | TM8MD_COUNT_ENABLE;
- break;
-
- case MNSCx_DIV_TIMER_8BIT:
- *gdbstub_port->_tmxmd = 0;
- *(volatile u8 *) gdbstub_port->_tmxbr = (u8)tmxbr;
- *gdbstub_port->_tmxmd = TM2MD_INIT_COUNTER;
- *gdbstub_port->_tmxmd = tmxmd | TM2MD_COUNT_ENABLE;
- break;
- }
-}
-
-/*
- * 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 & (PAGE_SIZE - 1);
-
- st &= SC01STR_RXF | SC01STR_RBF | SC01STR_FEF | SC01STR_PEF |
- SC01STR_OEF;
-
- /* deal with what we've got
- * - note that the UART doesn't do BREAK-detection for us
- */
- if (st & SC01STR_FEF && ch == 0) {
- switch (gdbstub_port->rx_brk) {
- case 0: gdbstub_port->rx_brk = 1; goto try_again;
- case 1: gdbstub_port->rx_brk = 2; goto try_again;
- case 2:
- gdbstub_port->rx_brk = 3;
- gdbstub_proto("### GDB MNSERIAL Rx Break Detected"
- " ###\n");
- return -EINTR;
- default:
- goto try_again;
- }
- } else if (st & SC01STR_FEF) {
- if (gdbstub_port->rx_brk)
- goto try_again;
-
- gdbstub_proto("### GDB MNSERIAL Framing Error ###\n");
- return -EIO;
- } else if (st & SC01STR_OEF) {
- if (gdbstub_port->rx_brk)
- goto try_again;
-
- gdbstub_proto("### GDB MNSERIAL Overrun Error ###\n");
- return -EIO;
- } else if (st & SC01STR_PEF) {
- if (gdbstub_port->rx_brk)
- goto try_again;
-
- gdbstub_proto("### GDB MNSERIAL Parity Error ###\n");
- return -EIO;
- } else {
- /* look for the tail-end char on a break run */
- if (gdbstub_port->rx_brk == 3) {
- switch (ch) {
- case 0xFF:
- case 0xFE:
- case 0xFC:
- case 0xF8:
- case 0xF0:
- case 0xE0:
- case 0xC0:
- case 0x80:
- case 0x00:
- gdbstub_port->rx_brk = 0;
- goto try_again;
- default:
- break;
- }
- }
-
- gdbstub_port->rx_brk = 0;
- gdbstub_io("### 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)
-{
- while (*gdbstub_port->_status & SC01STR_TBF)
- continue;
-
- if (ch == 0x0a) {
- *(u8 *) gdbstub_port->_txb = 0x0d;
- while (*gdbstub_port->_status & SC01STR_TBF)
- continue;
- }
-
- *(u8 *) gdbstub_port->_txb = ch;
-}
-
-/*
- * flush the transmission buffers
- */
-void gdbstub_io_tx_flush(void)
-{
- while (*gdbstub_port->_status & (SC01STR_TBF | SC01STR_TXF))
- continue;
-}