| 1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859 |
- /*
- * 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
|
