368dd5acd1
Implement the Panasonic MN10300 AM34 CPU subarch and implement SMP support for MN10300. Also implement support for the MN2WS0060 processor and the ASB2364 evaluation board which are AM34 based. Signed-off-by: Akira Takeuchi <takeuchi.akr@jp.panasonic.com> Signed-off-by: Kiyoshi Owada <owada.kiyoshi@jp.panasonic.com> Signed-off-by: David Howells <dhowells@redhat.com>
91 lines
2.3 KiB
ArmAsm
91 lines
2.3 KiB
ArmAsm
###############################################################################
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#
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# 16550 serial Rx interrupt handler for gdbstub I/O
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#
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# Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
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# Written by David Howells (dhowells@redhat.com)
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public Licence
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# as published by the Free Software Foundation; either version
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# 2 of the Licence, or (at your option) any later version.
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#
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###############################################################################
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#include <linux/sys.h>
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#include <linux/linkage.h>
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#include <asm/smp.h>
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#include <asm/cpu-regs.h>
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#include <asm/thread_info.h>
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#include <asm/frame.inc>
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#include <asm/intctl-regs.h>
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#include <asm/irqflags.h>
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#include <unit/serial.h>
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.text
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###############################################################################
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#
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# GDB stub serial receive interrupt entry point
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# - intended to run at interrupt priority 0
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#
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###############################################################################
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.globl gdbstub_io_rx_handler
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.type gdbstub_io_rx_handler,@function
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gdbstub_io_rx_handler:
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movm [d2,d3,a2,a3],(sp)
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#if 1
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movbu (GDBPORT_SERIAL_IIR),d2
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#endif
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mov (gdbstub_rx_inp),a3
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gdbstub_io_rx_more:
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mov a3,a2
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add 2,a3
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and 0x00000fff,a3
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mov (gdbstub_rx_outp),d3
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cmp a3,d3
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beq gdbstub_io_rx_overflow
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movbu (GDBPORT_SERIAL_LSR),d3
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btst UART_LSR_DR,d3
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beq gdbstub_io_rx_done
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movbu (GDBPORT_SERIAL_RX),d2
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movbu d3,(gdbstub_rx_buffer+1,a2)
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movbu d2,(gdbstub_rx_buffer,a2)
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mov a3,(gdbstub_rx_inp)
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bra gdbstub_io_rx_more
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gdbstub_io_rx_done:
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mov GxICR_DETECT,d2
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movbu d2,(XIRQxICR(GDBPORT_SERIAL_IRQ)) # ACK the interrupt
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movhu (XIRQxICR(GDBPORT_SERIAL_IRQ)),d2 # flush
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movm (sp),[d2,d3,a2,a3]
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bset 0x01,(gdbstub_busy)
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beq gdbstub_io_rx_enter
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rti
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gdbstub_io_rx_overflow:
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bset 0x01,(gdbstub_rx_overflow)
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bra gdbstub_io_rx_done
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gdbstub_io_rx_enter:
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LOCAL_CHANGE_INTR_MASK_LEVEL(NUM2EPSW_IM(CONFIG_GDBSTUB_IRQ_LEVEL+1))
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add -4,sp
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SAVE_ALL
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mov 0xffffffff,d0
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mov d0,(REG_ORIG_D0,fp)
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mov 0x280,d1
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mov fp,d0
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call gdbstub_rx_irq[],0 # gdbstub_rx_irq(regs,excep)
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LOCAL_CLI
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bclr 0x01,(gdbstub_busy)
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.globl gdbstub_return
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gdbstub_return:
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RESTORE_ALL
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.size gdbstub_io_rx_handler,.-gdbstub_io_rx_handler
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