2008-02-08 20:19:31 +08:00
|
|
|
###############################################################################
|
|
|
|
|
#
|
|
|
|
|
# 16550 serial Rx interrupt handler 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/sys.h>
|
|
|
|
|
#include <linux/linkage.h>
|
|
|
|
|
#include <asm/smp.h>
|
|
|
|
|
#include <asm/cpu-regs.h>
|
|
|
|
|
#include <asm/thread_info.h>
|
|
|
|
|
#include <asm/frame.inc>
|
|
|
|
|
#include <asm/intctl-regs.h>
|
2010-10-28 00:28:55 +08:00
|
|
|
#include <asm/irqflags.h>
|
2009-04-10 21:33:48 +08:00
|
|
|
#include <unit/serial.h>
|
2008-02-08 20:19:31 +08:00
|
|
|
|
|
|
|
|
.text
|
|
|
|
|
|
|
|
|
|
###############################################################################
|
|
|
|
|
#
|
|
|
|
|
# GDB stub serial receive interrupt entry point
|
|
|
|
|
# - intended to run at interrupt priority 0
|
|
|
|
|
#
|
|
|
|
|
###############################################################################
|
|
|
|
|
.globl gdbstub_io_rx_handler
|
|
|
|
|
.type gdbstub_io_rx_handler,@function
|
|
|
|
|
gdbstub_io_rx_handler:
|
|
|
|
|
movm [d2,d3,a2,a3],(sp)
|
|
|
|
|
|
|
|
|
|
#if 1
|
|
|
|
|
movbu (GDBPORT_SERIAL_IIR),d2
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
mov (gdbstub_rx_inp),a3
|
|
|
|
|
gdbstub_io_rx_more:
|
|
|
|
|
mov a3,a2
|
|
|
|
|
add 2,a3
|
|
|
|
|
and 0x00000fff,a3
|
|
|
|
|
mov (gdbstub_rx_outp),d3
|
|
|
|
|
cmp a3,d3
|
|
|
|
|
beq gdbstub_io_rx_overflow
|
|
|
|
|
|
|
|
|
|
movbu (GDBPORT_SERIAL_LSR),d3
|
|
|
|
|
btst UART_LSR_DR,d3
|
|
|
|
|
beq gdbstub_io_rx_done
|
|
|
|
|
movbu (GDBPORT_SERIAL_RX),d2
|
|
|
|
|
movbu d3,(gdbstub_rx_buffer+1,a2)
|
|
|
|
|
movbu d2,(gdbstub_rx_buffer,a2)
|
|
|
|
|
mov a3,(gdbstub_rx_inp)
|
|
|
|
|
bra gdbstub_io_rx_more
|
|
|
|
|
|
|
|
|
|
gdbstub_io_rx_done:
|
|
|
|
|
mov GxICR_DETECT,d2
|
|
|
|
|
movbu d2,(XIRQxICR(GDBPORT_SERIAL_IRQ)) # ACK the interrupt
|
|
|
|
|
movhu (XIRQxICR(GDBPORT_SERIAL_IRQ)),d2 # flush
|
|
|
|
|
movm (sp),[d2,d3,a2,a3]
|
|
|
|
|
bset 0x01,(gdbstub_busy)
|
|
|
|
|
beq gdbstub_io_rx_enter
|
|
|
|
|
rti
|
|
|
|
|
|
|
|
|
|
gdbstub_io_rx_overflow:
|
|
|
|
|
bset 0x01,(gdbstub_rx_overflow)
|
|
|
|
|
bra gdbstub_io_rx_done
|
|
|
|
|
|
|
|
|
|
gdbstub_io_rx_enter:
|
2010-10-28 00:28:55 +08:00
|
|
|
LOCAL_CHANGE_INTR_MASK_LEVEL(NUM2EPSW_IM(CONFIG_GDBSTUB_IRQ_LEVEL+1))
|
2008-02-08 20:19:31 +08:00
|
|
|
add -4,sp
|
|
|
|
|
SAVE_ALL
|
|
|
|
|
|
|
|
|
|
mov 0xffffffff,d0
|
|
|
|
|
mov d0,(REG_ORIG_D0,fp)
|
|
|
|
|
mov 0x280,d1
|
|
|
|
|
|
|
|
|
|
mov fp,d0
|
|
|
|
|
call gdbstub_rx_irq[],0 # gdbstub_rx_irq(regs,excep)
|
|
|
|
|
|
2010-10-28 00:28:55 +08:00
|
|
|
LOCAL_CLI
|
2008-02-08 20:19:31 +08:00
|
|
|
bclr 0x01,(gdbstub_busy)
|
|
|
|
|
|
|
|
|
|
.globl gdbstub_return
|
|
|
|
|
gdbstub_return:
|
|
|
|
|
RESTORE_ALL
|
|
|
|
|
|
|
|
|
|
.size gdbstub_io_rx_handler,.-gdbstub_io_rx_handler
|
