diff options
Diffstat (limited to 'arch/mips/gt64120/wrppmc/int-handler.S')
| -rw-r--r-- | arch/mips/gt64120/wrppmc/int-handler.S | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/arch/mips/gt64120/wrppmc/int-handler.S b/arch/mips/gt64120/wrppmc/int-handler.S new file mode 100644 index 00000000000..edee7b39417 --- /dev/null +++ b/arch/mips/gt64120/wrppmc/int-handler.S @@ -0,0 +1,59 @@ +/* + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * Copyright (C) 1995, 1996, 1997, 2003 by Ralf Baechle + * Copyright (C) Wind River System Inc. Rongkai.Zhan <rongkai.zhan@windriver.com> + */ +#include <asm/asm.h> +#include <asm/mipsregs.h> +#include <asm/addrspace.h> +#include <asm/regdef.h> +#include <asm/stackframe.h> +#include <asm/mach-wrppmc/mach-gt64120.h> + + .align 5 + .set noat +NESTED(handle_IRQ, PT_SIZE, sp) + SAVE_ALL + CLI # Important: mark KERNEL mode ! + .set at + + mfc0 t0, CP0_CAUSE # get pending interrupts + mfc0 t1, CP0_STATUS # get enabled interrupts + and t0, t0, t1 # get allowed interrupts + andi t0, t0, 0xFF00 + beqz t0, 1f + move a1, sp # Prepare 'struct pt_regs *regs' pointer + + andi t1, t0, CAUSEF_IP7 # CPU Compare/Count internal timer + bnez t1, handle_cputimer_irq + andi t1, t0, CAUSEF_IP6 # UART 16550 port + bnez t1, handle_uart_irq + andi t1, t0, CAUSEF_IP3 # PCI INT_A + bnez t1, handle_pci_intA_irq + + /* wrong alarm or masked ... */ +1: j spurious_interrupt + nop +END(handle_IRQ) + + .align 5 +handle_cputimer_irq: + li a0, WRPPMC_MIPS_TIMER_IRQ + jal do_IRQ + j ret_from_irq + + .align 5 +handle_uart_irq: + li a0, WRPPMC_UART16550_IRQ + jal do_IRQ + j ret_from_irq + + .align 5 +handle_pci_intA_irq: + li a0, WRPPMC_PCI_INTA_IRQ + jal do_IRQ + j ret_from_irq + |