60 lines
1.4 KiB
ArmAsm
60 lines
1.4 KiB
ArmAsm
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/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 1995, 1996, 1997, 2003 by Ralf Baechle
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* Copyright (C) Wind River System Inc. Rongkai.Zhan <rongkai.zhan@windriver.com>
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*/
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#include <asm/asm.h>
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#include <asm/mipsregs.h>
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#include <asm/addrspace.h>
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#include <asm/regdef.h>
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#include <asm/stackframe.h>
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#include <asm/mach-wrppmc/mach-gt64120.h>
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.align 5
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.set noat
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NESTED(handle_IRQ, PT_SIZE, sp)
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SAVE_ALL
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CLI # Important: mark KERNEL mode !
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.set at
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mfc0 t0, CP0_CAUSE # get pending interrupts
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mfc0 t1, CP0_STATUS # get enabled interrupts
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and t0, t0, t1 # get allowed interrupts
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andi t0, t0, 0xFF00
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beqz t0, 1f
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move a1, sp # Prepare 'struct pt_regs *regs' pointer
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andi t1, t0, CAUSEF_IP7 # CPU Compare/Count internal timer
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bnez t1, handle_cputimer_irq
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andi t1, t0, CAUSEF_IP6 # UART 16550 port
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bnez t1, handle_uart_irq
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andi t1, t0, CAUSEF_IP3 # PCI INT_A
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bnez t1, handle_pci_intA_irq
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/* wrong alarm or masked ... */
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1: j spurious_interrupt
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nop
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END(handle_IRQ)
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.align 5
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handle_cputimer_irq:
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li a0, WRPPMC_MIPS_TIMER_IRQ
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jal do_IRQ
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j ret_from_irq
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.align 5
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handle_uart_irq:
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li a0, WRPPMC_UART16550_IRQ
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jal do_IRQ
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j ret_from_irq
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.align 5
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handle_pci_intA_irq:
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li a0, WRPPMC_PCI_INTA_IRQ
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jal do_IRQ
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j ret_from_irq
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