109 lines
3.3 KiB
C
109 lines
3.3 KiB
C
/*
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* Carsten Langgaard, carstenl@mips.com
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* Copyright (C) 2000 MIPS Technologies, Inc. All rights reserved.
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*
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* ########################################################################
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*
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* This program is free software; you can distribute it and/or modify it
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* under the terms of the GNU General Public License (Version 2) as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
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*
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* ########################################################################
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*
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* This is the interface to the remote debugger stub.
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*
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*/
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#include <linux/types.h>
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#include <linux/serial.h>
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#include <linux/serialP.h>
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#include <linux/serial_reg.h>
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#include <linux/serial_ip3106.h>
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#include <asm/serial.h>
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#include <asm/io.h>
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#include <uart.h>
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static struct serial_state rs_table[IP3106_NR_PORTS] = {
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};
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static struct async_struct kdb_port_info = {0};
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void rs_kgdb_hook(int tty_no)
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{
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struct serial_state *ser = &rs_table[tty_no];
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kdb_port_info.state = ser;
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kdb_port_info.magic = SERIAL_MAGIC;
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kdb_port_info.port = tty_no;
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kdb_port_info.flags = ser->flags;
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/*
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* Clear all interrupts
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*/
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/* Clear all the transmitter FIFO counters (pointer and status) */
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ip3106_lcr(UART_BASE, tty_no) |= IP3106_UART_LCR_TX_RST;
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/* Clear all the receiver FIFO counters (pointer and status) */
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ip3106_lcr(UART_BASE, tty_no) |= IP3106_UART_LCR_RX_RST;
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/* Clear all interrupts */
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ip3106_iclr(UART_BASE, tty_no) = IP3106_UART_INT_ALLRX |
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IP3106_UART_INT_ALLTX;
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/*
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* Now, initialize the UART
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*/
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ip3106_lcr(UART_BASE, tty_no) = IP3106_UART_LCR_8BIT;
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ip3106_baud(UART_BASE, tty_no) = 5; // 38400 Baud
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}
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int putDebugChar(char c)
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{
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/* Wait until FIFO not full */
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while (((ip3106_fifo(UART_BASE, kdb_port_info.port) & IP3106_UART_FIFO_TXFIFO) >> 16) >= 16)
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;
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/* Send one char */
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ip3106_fifo(UART_BASE, kdb_port_info.port) = c;
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return 1;
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}
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char getDebugChar(void)
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{
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char ch;
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/* Wait until there is a char in the FIFO */
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while (!((ip3106_fifo(UART_BASE, kdb_port_info.port) &
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IP3106_UART_FIFO_RXFIFO) >> 8))
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;
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/* Read one char */
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ch = ip3106_fifo(UART_BASE, kdb_port_info.port) &
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IP3106_UART_FIFO_RBRTHR;
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/* Advance the RX FIFO read pointer */
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ip3106_lcr(UART_BASE, kdb_port_info.port) |= IP3106_UART_LCR_RX_NEXT;
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return (ch);
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}
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void rs_disable_debug_interrupts(void)
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{
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ip3106_ien(UART_BASE, kdb_port_info.port) = 0; /* Disable all interrupts */
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}
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void rs_enable_debug_interrupts(void)
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{
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/* Clear all the transmitter FIFO counters (pointer and status) */
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ip3106_lcr(UART_BASE, kdb_port_info.port) |= IP3106_UART_LCR_TX_RST;
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/* Clear all the receiver FIFO counters (pointer and status) */
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ip3106_lcr(UART_BASE, kdb_port_info.port) |= IP3106_UART_LCR_RX_RST;
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/* Clear all interrupts */
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ip3106_iclr(UART_BASE, kdb_port_info.port) = IP3106_UART_INT_ALLRX |
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IP3106_UART_INT_ALLTX;
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ip3106_ien(UART_BASE, kdb_port_info.port) = IP3106_UART_INT_ALLRX; /* Enable RX interrupts */
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}
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