diff options
Diffstat (limited to 'arch/mips/vr4181/common/int_handler.S')
| -rw-r--r-- | arch/mips/vr4181/common/int_handler.S | 206 |
1 files changed, 0 insertions, 206 deletions
diff --git a/arch/mips/vr4181/common/int_handler.S b/arch/mips/vr4181/common/int_handler.S deleted file mode 100644 index 2c041b8ee52..00000000000 --- a/arch/mips/vr4181/common/int_handler.S +++ /dev/null @@ -1,206 +0,0 @@ -/* - * arch/mips/vr4181/common/int_handler.S - * - * Adapted to the VR4181 and almost entirely rewritten: - * Copyright (C) 1999 Bradley D. LaRonde and Michael Klar - * - * Clean up to conform to the new IRQ - * Copyright (C) 2001 MontaVista Software Inc. - * Author: Jun Sun, jsun@mvista.com or jsun@junsun.net - * - * 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. - * - */ - -#include <asm/asm.h> -#include <asm/regdef.h> -#include <asm/mipsregs.h> -#include <asm/stackframe.h> - -#include <asm/vr4181/vr4181.h> - -/* - * [jsun] - * See include/asm/vr4181/irq.h for IRQ assignment and strategy. - */ - - .text - .set noreorder - - .align 5 - NESTED(vr4181_handle_irq, PT_SIZE, ra) - - .set noat - SAVE_ALL - CLI - - .set at - .set noreorder - - mfc0 t0, CP0_CAUSE - mfc0 t2, CP0_STATUS - - and t0, t2 - - /* we check IP3 first; it happens most frequently */ - andi t1, t0, STATUSF_IP3 - bnez t1, ll_cpu_ip3 - andi t1, t0, STATUSF_IP2 - bnez t1, ll_cpu_ip2 - andi t1, t0, STATUSF_IP7 /* cpu timer */ - bnez t1, ll_cputimer_irq - andi t1, t0, STATUSF_IP4 - bnez t1, ll_cpu_ip4 - andi t1, t0, STATUSF_IP5 - bnez t1, ll_cpu_ip5 - andi t1, t0, STATUSF_IP6 - bnez t1, ll_cpu_ip6 - andi t1, t0, STATUSF_IP0 /* software int 0 */ - bnez t1, ll_cpu_ip0 - andi t1, t0, STATUSF_IP1 /* software int 1 */ - bnez t1, ll_cpu_ip1 - nop - - .set reorder -do_spurious: - j spurious_interrupt - -/* - * regular CPU irqs - */ -ll_cputimer_irq: - li a0, VR4181_IRQ_TIMER - move a1, sp - jal do_IRQ - j ret_from_irq - - -ll_cpu_ip0: - li a0, VR4181_IRQ_SW1 - move a1, sp - jal do_IRQ - j ret_from_irq - -ll_cpu_ip1: - li a0, VR4181_IRQ_SW2 - move a1, sp - jal do_IRQ - j ret_from_irq - -ll_cpu_ip3: - li a0, VR4181_IRQ_INT1 - move a1, sp - jal do_IRQ - j ret_from_irq - -ll_cpu_ip4: - li a0, VR4181_IRQ_INT2 - move a1, sp - jal do_IRQ - j ret_from_irq - -ll_cpu_ip5: - li a0, VR4181_IRQ_INT3 - move a1, sp - jal do_IRQ - j ret_from_irq - -ll_cpu_ip6: - li a0, VR4181_IRQ_INT4 - move a1, sp - jal do_IRQ - j ret_from_irq - -/* - * One of the sys irq has happend. - * - * In the interest of speed, we first determine in the following order - * which 16-irq block have pending interrupts: - * sysint1 (16 sources, including cascading intrs from GPIO) - * sysint2 - * gpio (16 intr sources) - * - * Then we do binary search to find the exact interrupt source. - */ -ll_cpu_ip2: - - lui t3,%hi(VR4181_SYSINT1REG) - lhu t0,%lo(VR4181_SYSINT1REG)(t3) - lhu t2,%lo(VR4181_MSYSINT1REG)(t3) - and t0, 0xfffb /* hack - remove RTC Long 1 intr */ - and t0, t2 - beqz t0, check_sysint2 - - /* check for GPIO interrupts */ - andi t1, t0, 0x0100 - bnez t1, check_gpio_int - - /* so we have an interrupt in sysint1 which is not gpio int */ - li a0, VR4181_SYS_IRQ_BASE - 1 - j check_16 - -check_sysint2: - - lhu t0,%lo(VR4181_SYSINT2REG)(t3) - lhu t2,%lo(VR4181_MSYSINT2REG)(t3) - and t0, 0xfffe /* hack - remove RTC Long 2 intr */ - and t0, t2 - li a0, VR4181_SYS_IRQ_BASE + 16 - 1 - j check_16 - -check_gpio_int: - lui t3,%hi(VR4181_GPINTMSK) - lhu t0,%lo(VR4181_GPINTMSK)(t3) - lhu t2,%lo(VR4181_GPINTSTAT)(t3) - xori t0, 0xffff /* why? reverse logic? */ - and t0, t2 - li a0, VR4181_GPIO_IRQ_BASE - 1 - j check_16 - -/* - * When we reach check_16, we have 16-bit status in t0 and base irq number - * in a0. - */ -check_16: - andi t1, t0, 0xff - bnez t1, check_8 - - srl t0, 8 - addi a0, 8 - j check_8 - -/* - * When we reach check_8, we have 8-bit status in t0 and base irq number - * in a0. - */ -check_8: - andi t1, t0, 0xf - bnez t1, check_4 - - srl t0, 4 - addi a0, 4 - j check_4 - -/* - * When we reach check_4, we have 4-bit status in t0 and base irq number - * in a0. - */ -check_4: - andi t0, t0, 0xf - beqz t0, do_spurious - -loop: - andi t2, t0, 0x1 - srl t0, 1 - addi a0, 1 - beqz t2, loop - -found_it: - move a1, sp - jal do_IRQ - - j ret_from_irq - - END(vr4181_handle_irq) |