From: Yoichi Yuasa This patch has updated IRQ handling for vr41xx. o added common IRQ dispatch o changed IRQ number in int-handler.S o added resource management to icu.c Signed-off-by: Yoichi Yuasa Cc: Ralf Baechle Signed-off-by: Andrew Morton --- arch/mips/vr41xx/common/Makefile | 2 arch/mips/vr41xx/common/icu.c | 270 +++++++++++++++------------------- arch/mips/vr41xx/common/int-handler.S | 10 - arch/mips/vr41xx/common/irq.c | 94 +++++++++++ include/asm-mips/vr41xx/vr41xx.h | 16 +- 5 files changed, 234 insertions(+), 158 deletions(-) diff -puN arch/mips/vr41xx/common/icu.c~mips-update-irq-handling-for-vr41xx arch/mips/vr41xx/common/icu.c --- devel/arch/mips/vr41xx/common/icu.c~mips-update-irq-handling-for-vr41xx 2005-08-01 16:54:53.000000000 -0700 +++ devel-akpm/arch/mips/vr41xx/common/icu.c 2005-08-01 16:54:53.000000000 -0700 @@ -3,8 +3,7 @@ * * Copyright (C) 2001-2002 MontaVista Software Inc. * Author: Yoichi Yuasa - * Copyright (C) 2003-2004 Yoichi Yuasa - * Copyright (C) 2005 Ralf Baechle (ralf@linux-mips.org) + * Copyright (C) 2003-2005 Yoichi Yuasa * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by @@ -31,7 +30,7 @@ */ #include #include -#include +#include #include #include #include @@ -39,34 +38,24 @@ #include #include -#include -#include #include -extern asmlinkage void vr41xx_handle_interrupt(void); - -extern void init_vr41xx_giuint_irq(void); -extern void giuint_irq_dispatch(struct pt_regs *regs); - -static uint32_t icu1_base; -static uint32_t icu2_base; - -static struct irqaction icu_cascade = { - .handler = no_action, - .mask = CPU_MASK_NONE, - .name = "cascade", -}; +static void __iomem *icu1_base; +static void __iomem *icu2_base; static unsigned char sysint1_assign[16] = { 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }; static unsigned char sysint2_assign[16] = { - 2, 0, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }; + 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }; -#define SYSINT1REG_TYPE1 KSEG1ADDR(0x0b000080) -#define SYSINT2REG_TYPE1 KSEG1ADDR(0x0b000200) +#define ICU1_TYPE1_BASE 0x0b000080UL +#define ICU2_TYPE1_BASE 0x0b000200UL -#define SYSINT1REG_TYPE2 KSEG1ADDR(0x0f000080) -#define SYSINT2REG_TYPE2 KSEG1ADDR(0x0f0000a0) +#define ICU1_TYPE2_BASE 0x0f000080UL +#define ICU2_TYPE2_BASE 0x0f0000a0UL + +#define ICU1_SIZE 0x20 +#define ICU2_SIZE 0x1c #define SYSINT1REG 0x00 #define PIUINTREG 0x02 @@ -106,61 +95,61 @@ static unsigned char sysint2_assign[16] #define SYSINT1_IRQ_TO_PIN(x) ((x) - SYSINT1_IRQ_BASE) /* Pin 0-15 */ #define SYSINT2_IRQ_TO_PIN(x) ((x) - SYSINT2_IRQ_BASE) /* Pin 0-15 */ -#define read_icu1(offset) readw(icu1_base + (offset)) -#define write_icu1(val, offset) writew((val), icu1_base + (offset)) +#define INT_TO_IRQ(x) ((x) + 2) /* Int0-4 -> IRQ2-6 */ + +#define icu1_read(offset) readw(icu1_base + (offset)) +#define icu1_write(offset, value) writew((value), icu1_base + (offset)) -#define read_icu2(offset) readw(icu2_base + (offset)) -#define write_icu2(val, offset) writew((val), icu2_base + (offset)) +#define icu2_read(offset) readw(icu2_base + (offset)) +#define icu2_write(offset, value) writew((value), icu2_base + (offset)) #define INTASSIGN_MAX 4 #define INTASSIGN_MASK 0x0007 -static inline uint16_t set_icu1(uint8_t offset, uint16_t set) +static inline uint16_t icu1_set(uint8_t offset, uint16_t set) { - uint16_t res; + uint16_t data; - res = read_icu1(offset); - res |= set; - write_icu1(res, offset); + data = icu1_read(offset); + data |= set; + icu1_write(offset, data); - return res; + return data; } -static inline uint16_t clear_icu1(uint8_t offset, uint16_t clear) +static inline uint16_t icu1_clear(uint8_t offset, uint16_t clear) { - uint16_t res; + uint16_t data; - res = read_icu1(offset); - res &= ~clear; - write_icu1(res, offset); + data = icu1_read(offset); + data &= ~clear; + icu1_write(offset, data); - return res; + return data; } -static inline uint16_t set_icu2(uint8_t offset, uint16_t set) +static inline uint16_t icu2_set(uint8_t offset, uint16_t set) { - uint16_t res; + uint16_t data; - res = read_icu2(offset); - res |= set; - write_icu2(res, offset); + data = icu2_read(offset); + data |= set; + icu2_write(offset, data); - return res; + return data; } -static inline uint16_t clear_icu2(uint8_t offset, uint16_t clear) +static inline uint16_t icu2_clear(uint8_t offset, uint16_t clear) { - uint16_t res; + uint16_t data; - res = read_icu2(offset); - res &= ~clear; - write_icu2(res, offset); + data = icu2_read(offset); + data &= ~clear; + icu2_write(offset, data); - return res; + return data; } -/*=======================================================================*/ - void vr41xx_enable_piuint(uint16_t mask) { irq_desc_t *desc = irq_desc + PIU_IRQ; @@ -169,7 +158,7 @@ void vr41xx_enable_piuint(uint16_t mask) if (current_cpu_data.cputype == CPU_VR4111 || current_cpu_data.cputype == CPU_VR4121) { spin_lock_irqsave(&desc->lock, flags); - set_icu1(MPIUINTREG, mask); + icu1_set(MPIUINTREG, mask); spin_unlock_irqrestore(&desc->lock, flags); } } @@ -184,7 +173,7 @@ void vr41xx_disable_piuint(uint16_t mask if (current_cpu_data.cputype == CPU_VR4111 || current_cpu_data.cputype == CPU_VR4121) { spin_lock_irqsave(&desc->lock, flags); - clear_icu1(MPIUINTREG, mask); + icu1_clear(MPIUINTREG, mask); spin_unlock_irqrestore(&desc->lock, flags); } } @@ -199,7 +188,7 @@ void vr41xx_enable_aiuint(uint16_t mask) if (current_cpu_data.cputype == CPU_VR4111 || current_cpu_data.cputype == CPU_VR4121) { spin_lock_irqsave(&desc->lock, flags); - set_icu1(MAIUINTREG, mask); + icu1_set(MAIUINTREG, mask); spin_unlock_irqrestore(&desc->lock, flags); } } @@ -214,7 +203,7 @@ void vr41xx_disable_aiuint(uint16_t mask if (current_cpu_data.cputype == CPU_VR4111 || current_cpu_data.cputype == CPU_VR4121) { spin_lock_irqsave(&desc->lock, flags); - clear_icu1(MAIUINTREG, mask); + icu1_clear(MAIUINTREG, mask); spin_unlock_irqrestore(&desc->lock, flags); } } @@ -229,7 +218,7 @@ void vr41xx_enable_kiuint(uint16_t mask) if (current_cpu_data.cputype == CPU_VR4111 || current_cpu_data.cputype == CPU_VR4121) { spin_lock_irqsave(&desc->lock, flags); - set_icu1(MKIUINTREG, mask); + icu1_set(MKIUINTREG, mask); spin_unlock_irqrestore(&desc->lock, flags); } } @@ -244,7 +233,7 @@ void vr41xx_disable_kiuint(uint16_t mask if (current_cpu_data.cputype == CPU_VR4111 || current_cpu_data.cputype == CPU_VR4121) { spin_lock_irqsave(&desc->lock, flags); - clear_icu1(MKIUINTREG, mask); + icu1_clear(MKIUINTREG, mask); spin_unlock_irqrestore(&desc->lock, flags); } } @@ -257,7 +246,7 @@ void vr41xx_enable_dsiuint(uint16_t mask unsigned long flags; spin_lock_irqsave(&desc->lock, flags); - set_icu1(MDSIUINTREG, mask); + icu1_set(MDSIUINTREG, mask); spin_unlock_irqrestore(&desc->lock, flags); } @@ -269,7 +258,7 @@ void vr41xx_disable_dsiuint(uint16_t mas unsigned long flags; spin_lock_irqsave(&desc->lock, flags); - clear_icu1(MDSIUINTREG, mask); + icu1_clear(MDSIUINTREG, mask); spin_unlock_irqrestore(&desc->lock, flags); } @@ -281,7 +270,7 @@ void vr41xx_enable_firint(uint16_t mask) unsigned long flags; spin_lock_irqsave(&desc->lock, flags); - set_icu2(MFIRINTREG, mask); + icu2_set(MFIRINTREG, mask); spin_unlock_irqrestore(&desc->lock, flags); } @@ -293,7 +282,7 @@ void vr41xx_disable_firint(uint16_t mask unsigned long flags; spin_lock_irqsave(&desc->lock, flags); - clear_icu2(MFIRINTREG, mask); + icu2_clear(MFIRINTREG, mask); spin_unlock_irqrestore(&desc->lock, flags); } @@ -308,7 +297,7 @@ void vr41xx_enable_pciint(void) current_cpu_data.cputype == CPU_VR4131 || current_cpu_data.cputype == CPU_VR4133) { spin_lock_irqsave(&desc->lock, flags); - write_icu2(PCIINT0, MPCIINTREG); + icu2_write(MPCIINTREG, PCIINT0); spin_unlock_irqrestore(&desc->lock, flags); } } @@ -324,7 +313,7 @@ void vr41xx_disable_pciint(void) current_cpu_data.cputype == CPU_VR4131 || current_cpu_data.cputype == CPU_VR4133) { spin_lock_irqsave(&desc->lock, flags); - write_icu2(0, MPCIINTREG); + icu2_write(MPCIINTREG, 0); spin_unlock_irqrestore(&desc->lock, flags); } } @@ -340,7 +329,7 @@ void vr41xx_enable_scuint(void) current_cpu_data.cputype == CPU_VR4131 || current_cpu_data.cputype == CPU_VR4133) { spin_lock_irqsave(&desc->lock, flags); - write_icu2(SCUINT0, MSCUINTREG); + icu2_write(MSCUINTREG, SCUINT0); spin_unlock_irqrestore(&desc->lock, flags); } } @@ -356,7 +345,7 @@ void vr41xx_disable_scuint(void) current_cpu_data.cputype == CPU_VR4131 || current_cpu_data.cputype == CPU_VR4133) { spin_lock_irqsave(&desc->lock, flags); - write_icu2(0, MSCUINTREG); + icu2_write(MSCUINTREG, 0); spin_unlock_irqrestore(&desc->lock, flags); } } @@ -372,7 +361,7 @@ void vr41xx_enable_csiint(uint16_t mask) current_cpu_data.cputype == CPU_VR4131 || current_cpu_data.cputype == CPU_VR4133) { spin_lock_irqsave(&desc->lock, flags); - set_icu2(MCSIINTREG, mask); + icu2_set(MCSIINTREG, mask); spin_unlock_irqrestore(&desc->lock, flags); } } @@ -388,7 +377,7 @@ void vr41xx_disable_csiint(uint16_t mask current_cpu_data.cputype == CPU_VR4131 || current_cpu_data.cputype == CPU_VR4133) { spin_lock_irqsave(&desc->lock, flags); - clear_icu2(MCSIINTREG, mask); + icu2_clear(MCSIINTREG, mask); spin_unlock_irqrestore(&desc->lock, flags); } } @@ -404,7 +393,7 @@ void vr41xx_enable_bcuint(void) current_cpu_data.cputype == CPU_VR4131 || current_cpu_data.cputype == CPU_VR4133) { spin_lock_irqsave(&desc->lock, flags); - write_icu2(BCUINTR, MBCUINTREG); + icu2_write(MBCUINTREG, BCUINTR); spin_unlock_irqrestore(&desc->lock, flags); } } @@ -420,30 +409,28 @@ void vr41xx_disable_bcuint(void) current_cpu_data.cputype == CPU_VR4131 || current_cpu_data.cputype == CPU_VR4133) { spin_lock_irqsave(&desc->lock, flags); - write_icu2(0, MBCUINTREG); + icu2_write(MBCUINTREG, 0); spin_unlock_irqrestore(&desc->lock, flags); } } EXPORT_SYMBOL(vr41xx_disable_bcuint); -/*=======================================================================*/ - static unsigned int startup_sysint1_irq(unsigned int irq) { - set_icu1(MSYSINT1REG, (uint16_t)1 << SYSINT1_IRQ_TO_PIN(irq)); + icu1_set(MSYSINT1REG, 1 << SYSINT1_IRQ_TO_PIN(irq)); return 0; /* never anything pending */ } static void shutdown_sysint1_irq(unsigned int irq) { - clear_icu1(MSYSINT1REG, (uint16_t)1 << SYSINT1_IRQ_TO_PIN(irq)); + icu1_clear(MSYSINT1REG, 1 << SYSINT1_IRQ_TO_PIN(irq)); } static void enable_sysint1_irq(unsigned int irq) { - set_icu1(MSYSINT1REG, (uint16_t)1 << SYSINT1_IRQ_TO_PIN(irq)); + icu1_set(MSYSINT1REG, 1 << SYSINT1_IRQ_TO_PIN(irq)); } #define disable_sysint1_irq shutdown_sysint1_irq @@ -452,7 +439,7 @@ static void enable_sysint1_irq(unsigned static void end_sysint1_irq(unsigned int irq) { if (!(irq_desc[irq].status & (IRQ_DISABLED | IRQ_INPROGRESS))) - set_icu1(MSYSINT1REG, (uint16_t)1 << SYSINT1_IRQ_TO_PIN(irq)); + icu1_set(MSYSINT1REG, 1 << SYSINT1_IRQ_TO_PIN(irq)); } static struct hw_interrupt_type sysint1_irq_type = { @@ -465,23 +452,21 @@ static struct hw_interrupt_type sysint1_ .end = end_sysint1_irq, }; -/*=======================================================================*/ - static unsigned int startup_sysint2_irq(unsigned int irq) { - set_icu2(MSYSINT2REG, (uint16_t)1 << SYSINT2_IRQ_TO_PIN(irq)); + icu2_set(MSYSINT2REG, 1 << SYSINT2_IRQ_TO_PIN(irq)); return 0; /* never anything pending */ } static void shutdown_sysint2_irq(unsigned int irq) { - clear_icu2(MSYSINT2REG, (uint16_t)1 << SYSINT2_IRQ_TO_PIN(irq)); + icu2_clear(MSYSINT2REG, 1 << SYSINT2_IRQ_TO_PIN(irq)); } static void enable_sysint2_irq(unsigned int irq) { - set_icu2(MSYSINT2REG, (uint16_t)1 << SYSINT2_IRQ_TO_PIN(irq)); + icu2_set(MSYSINT2REG, 1 << SYSINT2_IRQ_TO_PIN(irq)); } #define disable_sysint2_irq shutdown_sysint2_irq @@ -490,7 +475,7 @@ static void enable_sysint2_irq(unsigned static void end_sysint2_irq(unsigned int irq) { if (!(irq_desc[irq].status & (IRQ_DISABLED | IRQ_INPROGRESS))) - set_icu2(MSYSINT2REG, (uint16_t)1 << SYSINT2_IRQ_TO_PIN(irq)); + icu2_set(MSYSINT2REG, 1 << SYSINT2_IRQ_TO_PIN(irq)); } static struct hw_interrupt_type sysint2_irq_type = { @@ -503,8 +488,6 @@ static struct hw_interrupt_type sysint2_ .end = end_sysint2_irq, }; -/*=======================================================================*/ - static inline int set_sysint1_assign(unsigned int irq, unsigned char assign) { irq_desc_t *desc = irq_desc + irq; @@ -515,8 +498,8 @@ static inline int set_sysint1_assign(uns spin_lock_irq(&desc->lock); - intassign0 = read_icu1(INTASSIGN0); - intassign1 = read_icu1(INTASSIGN1); + intassign0 = icu1_read(INTASSIGN0); + intassign1 = icu1_read(INTASSIGN1); switch (pin) { case 0: @@ -556,8 +539,8 @@ static inline int set_sysint1_assign(uns } sysint1_assign[pin] = assign; - write_icu1(intassign0, INTASSIGN0); - write_icu1(intassign1, INTASSIGN1); + icu1_write(INTASSIGN0, intassign0); + icu1_write(INTASSIGN1, intassign1); spin_unlock_irq(&desc->lock); @@ -574,8 +557,8 @@ static inline int set_sysint2_assign(uns spin_lock_irq(&desc->lock); - intassign2 = read_icu1(INTASSIGN2); - intassign3 = read_icu1(INTASSIGN3); + intassign2 = icu1_read(INTASSIGN2); + intassign3 = icu1_read(INTASSIGN3); switch (pin) { case 0: @@ -623,8 +606,8 @@ static inline int set_sysint2_assign(uns } sysint2_assign[pin] = assign; - write_icu1(intassign2, INTASSIGN2); - write_icu1(intassign3, INTASSIGN3); + icu1_write(INTASSIGN2, intassign2); + icu1_write(INTASSIGN3, intassign3); spin_unlock_irq(&desc->lock); @@ -651,88 +634,92 @@ int vr41xx_set_intassign(unsigned int ir EXPORT_SYMBOL(vr41xx_set_intassign); -/*=======================================================================*/ - -asmlinkage void irq_dispatch(unsigned char intnum, struct pt_regs *regs) +static int icu_get_irq(unsigned int irq, struct pt_regs *regs) { uint16_t pend1, pend2; uint16_t mask1, mask2; int i; - pend1 = read_icu1(SYSINT1REG); - mask1 = read_icu1(MSYSINT1REG); + pend1 = icu1_read(SYSINT1REG); + mask1 = icu1_read(MSYSINT1REG); - pend2 = read_icu2(SYSINT2REG); - mask2 = read_icu2(MSYSINT2REG); + pend2 = icu2_read(SYSINT2REG); + mask2 = icu2_read(MSYSINT2REG); mask1 &= pend1; mask2 &= pend2; if (mask1) { for (i = 0; i < 16; i++) { - if (intnum == sysint1_assign[i] && - (mask1 & ((uint16_t)1 << i))) { - if (i == 8) - giuint_irq_dispatch(regs); - else - do_IRQ(SYSINT1_IRQ(i), regs); - return; - } + if (irq == INT_TO_IRQ(sysint1_assign[i]) && (mask1 & (1 << i))) + return SYSINT1_IRQ(i); } } if (mask2) { for (i = 0; i < 16; i++) { - if (intnum == sysint2_assign[i] && - (mask2 & ((uint16_t)1 << i))) { - do_IRQ(SYSINT2_IRQ(i), regs); - return; - } + if (irq == INT_TO_IRQ(sysint2_assign[i]) && (mask2 & (1 << i))) + return SYSINT2_IRQ(i); } } printk(KERN_ERR "spurious ICU interrupt: %04x,%04x\n", pend1, pend2); atomic_inc(&irq_err_count); -} -/*=======================================================================*/ + return -1; +} static int __init vr41xx_icu_init(void) { + unsigned long icu1_start, icu2_start; + int i; + switch (current_cpu_data.cputype) { case CPU_VR4111: case CPU_VR4121: - icu1_base = SYSINT1REG_TYPE1; - icu2_base = SYSINT2REG_TYPE1; + icu1_start = ICU1_TYPE1_BASE; + icu2_start = ICU2_TYPE1_BASE; break; case CPU_VR4122: case CPU_VR4131: case CPU_VR4133: - icu1_base = SYSINT1REG_TYPE2; - icu2_base = SYSINT2REG_TYPE2; + icu1_start = ICU1_TYPE2_BASE; + icu2_start = ICU2_TYPE2_BASE; break; default: printk(KERN_ERR "ICU: Unexpected CPU of NEC VR4100 series\n"); - return -EINVAL; + return -ENODEV; } - write_icu1(0, MSYSINT1REG); - write_icu1(0xffff, MGIUINTLREG); + if (request_mem_region(icu1_start, ICU1_SIZE, "ICU") == NULL) + return -EBUSY; - write_icu2(0, MSYSINT2REG); - write_icu2(0xffff, MGIUINTHREG); + if (request_mem_region(icu2_start, ICU2_SIZE, "ICU") == NULL) { + release_mem_region(icu1_start, ICU1_SIZE); + return -EBUSY; + } - return 0; -} + icu1_base = ioremap(icu1_start, ICU1_SIZE); + if (icu1_base == NULL) { + release_mem_region(icu1_start, ICU1_SIZE); + release_mem_region(icu2_start, ICU2_SIZE); + return -ENOMEM; + } -early_initcall(vr41xx_icu_init); + icu2_base = ioremap(icu2_start, ICU2_SIZE); + if (icu2_base == NULL) { + iounmap(icu1_base); + release_mem_region(icu1_start, ICU1_SIZE); + release_mem_region(icu2_start, ICU2_SIZE); + return -ENOMEM; + } -/*=======================================================================*/ + icu1_write(MSYSINT1REG, 0); + icu1_write(MGIUINTLREG, 0xffff); -static inline void init_vr41xx_icu_irq(void) -{ - int i; + icu2_write(MSYSINT2REG, 0); + icu2_write(MGIUINTHREG, 0xffff); for (i = SYSINT1_IRQ_BASE; i <= SYSINT1_IRQ_LAST; i++) irq_desc[i].handler = &sysint1_irq_type; @@ -740,18 +727,13 @@ static inline void init_vr41xx_icu_irq(v for (i = SYSINT2_IRQ_BASE; i <= SYSINT2_IRQ_LAST; i++) irq_desc[i].handler = &sysint2_irq_type; - setup_irq(INT0_CASCADE_IRQ, &icu_cascade); - setup_irq(INT1_CASCADE_IRQ, &icu_cascade); - setup_irq(INT2_CASCADE_IRQ, &icu_cascade); - setup_irq(INT3_CASCADE_IRQ, &icu_cascade); - setup_irq(INT4_CASCADE_IRQ, &icu_cascade); -} + cascade_irq(INT0_IRQ, icu_get_irq); + cascade_irq(INT1_IRQ, icu_get_irq); + cascade_irq(INT2_IRQ, icu_get_irq); + cascade_irq(INT3_IRQ, icu_get_irq); + cascade_irq(INT4_IRQ, icu_get_irq); -void __init arch_init_irq(void) -{ - mips_cpu_irq_init(MIPS_CPU_IRQ_BASE); - init_vr41xx_icu_irq(); - init_vr41xx_giuint_irq(); - - set_except_vector(0, vr41xx_handle_interrupt); + return 0; } + +core_initcall(vr41xx_icu_init); diff -puN arch/mips/vr41xx/common/int-handler.S~mips-update-irq-handling-for-vr41xx arch/mips/vr41xx/common/int-handler.S --- devel/arch/mips/vr41xx/common/int-handler.S~mips-update-irq-handling-for-vr41xx 2005-08-01 16:54:53.000000000 -0700 +++ devel-akpm/arch/mips/vr41xx/common/int-handler.S 2005-08-01 16:54:53.000000000 -0700 @@ -71,24 +71,24 @@ andi t1, t0, CAUSEF_IP3 # check for Int1 bnez t1, handle_int - li a0, 1 + li a0, 3 andi t1, t0, CAUSEF_IP4 # check for Int2 bnez t1, handle_int - li a0, 2 + li a0, 4 andi t1, t0, CAUSEF_IP5 # check for Int3 bnez t1, handle_int - li a0, 3 + li a0, 5 andi t1, t0, CAUSEF_IP6 # check for Int4 bnez t1, handle_int - li a0, 4 + li a0, 6 1: andi t1, t0, CAUSEF_IP2 # check for Int0 bnez t1, handle_int - li a0, 0 + li a0, 2 andi t1, t0, CAUSEF_IP0 # check for IP0 bnez t1, handle_irq diff -puN /dev/null arch/mips/vr41xx/common/irq.c --- /dev/null 2003-09-15 06:40:47.000000000 -0700 +++ devel-akpm/arch/mips/vr41xx/common/irq.c 2005-08-01 16:54:53.000000000 -0700 @@ -0,0 +1,94 @@ +/* + * Interrupt handing routines for NEC VR4100 series. + * + * Copyright (C) 2005 Yoichi Yuasa + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ +#include +#include + +#include +#include +#include + +typedef struct irq_cascade { + int (*get_irq)(unsigned int, struct pt_regs *); +} irq_cascade_t; + +static irq_cascade_t irq_cascade[NR_IRQS] __cacheline_aligned; + +static struct irqaction cascade_irqaction = { + .handler = no_action, + .mask = CPU_MASK_NONE, + .name = "cascade", +}; + +int cascade_irq(unsigned int irq, int (*get_irq)(unsigned int, struct pt_regs *)) +{ + int retval = 0; + + if (irq >= NR_IRQS) + return -EINVAL; + + if (irq_cascade[irq].get_irq != NULL) + free_irq(irq, NULL); + + irq_cascade[irq].get_irq = get_irq; + + if (get_irq != NULL) { + retval = setup_irq(irq, &cascade_irqaction); + if (retval < 0) + irq_cascade[irq].get_irq = NULL; + } + + return retval; +} + +EXPORT_SYMBOL_GPL(cascade_irq); + +asmlinkage void irq_dispatch(unsigned int irq, struct pt_regs *regs) +{ + irq_cascade_t *cascade; + irq_desc_t *desc; + + if (irq >= NR_IRQS) { + atomic_inc(&irq_err_count); + return; + } + + cascade = irq_cascade + irq; + if (cascade->get_irq != NULL) { + unsigned int source_irq = irq; + desc = irq_desc + source_irq; + desc->handler->ack(source_irq); + irq = cascade->get_irq(irq, regs); + if (irq < 0) + atomic_inc(&irq_err_count); + else + irq_dispatch(irq, regs); + desc->handler->end(source_irq); + } else + do_IRQ(irq, regs); +} + +extern asmlinkage void vr41xx_handle_interrupt(void); + +void __init arch_init_irq(void) +{ + mips_cpu_irq_init(MIPS_CPU_IRQ_BASE); + + set_except_vector(0, vr41xx_handle_interrupt); +} diff -puN arch/mips/vr41xx/common/Makefile~mips-update-irq-handling-for-vr41xx arch/mips/vr41xx/common/Makefile --- devel/arch/mips/vr41xx/common/Makefile~mips-update-irq-handling-for-vr41xx 2005-08-01 16:54:53.000000000 -0700 +++ devel-akpm/arch/mips/vr41xx/common/Makefile 2005-08-01 16:54:53.000000000 -0700 @@ -2,7 +2,7 @@ # Makefile for common code of the NEC VR4100 series. # -obj-y += bcu.o cmu.o icu.o init.o int-handler.o pmu.o +obj-y += bcu.o cmu.o icu.o init.o int-handler.o irq.o pmu.o obj-$(CONFIG_VRC4173) += vrc4173.o EXTRA_AFLAGS := $(CFLAGS) diff -puN include/asm-mips/vr41xx/vr41xx.h~mips-update-irq-handling-for-vr41xx include/asm-mips/vr41xx/vr41xx.h --- devel/include/asm-mips/vr41xx/vr41xx.h~mips-update-irq-handling-for-vr41xx 2005-08-01 16:54:53.000000000 -0700 +++ devel-akpm/include/asm-mips/vr41xx/vr41xx.h 2005-08-01 16:54:53.000000000 -0700 @@ -7,7 +7,7 @@ * Copyright (C) 2001, 2002 Paul Mundt * Copyright (C) 2002 MontaVista Software, Inc. * Copyright (C) 2002 TimeSys Corp. - * Copyright (C) 2003-2004 Yoichi Yuasa + * Copyright (C) 2003-2005 Yoichi Yuasa * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the @@ -79,11 +79,11 @@ extern void vr41xx_mask_clock(vr41xx_clo #define MIPS_CPU_IRQ(x) (MIPS_CPU_IRQ_BASE + (x)) #define MIPS_SOFTINT0_IRQ MIPS_CPU_IRQ(0) #define MIPS_SOFTINT1_IRQ MIPS_CPU_IRQ(1) -#define INT0_CASCADE_IRQ MIPS_CPU_IRQ(2) -#define INT1_CASCADE_IRQ MIPS_CPU_IRQ(3) -#define INT2_CASCADE_IRQ MIPS_CPU_IRQ(4) -#define INT3_CASCADE_IRQ MIPS_CPU_IRQ(5) -#define INT4_CASCADE_IRQ MIPS_CPU_IRQ(6) +#define INT0_IRQ MIPS_CPU_IRQ(2) +#define INT1_IRQ MIPS_CPU_IRQ(3) +#define INT2_IRQ MIPS_CPU_IRQ(4) +#define INT3_IRQ MIPS_CPU_IRQ(5) +#define INT4_IRQ MIPS_CPU_IRQ(6) #define TIMER_IRQ MIPS_CPU_IRQ(7) /* SYINT1 Interrupt Numbers */ @@ -97,7 +97,7 @@ extern void vr41xx_mask_clock(vr41xx_clo #define PIU_IRQ SYSINT1_IRQ(5) #define AIU_IRQ SYSINT1_IRQ(6) #define KIU_IRQ SYSINT1_IRQ(7) -#define GIUINT_CASCADE_IRQ SYSINT1_IRQ(8) +#define GIUINT_IRQ SYSINT1_IRQ(8) #define SIU_IRQ SYSINT1_IRQ(9) #define BUSERR_IRQ SYSINT1_IRQ(10) #define SOFTINT_IRQ SYSINT1_IRQ(11) @@ -128,7 +128,7 @@ extern void vr41xx_mask_clock(vr41xx_clo #define GIU_IRQ_LAST GIU_IRQ(31) extern int vr41xx_set_intassign(unsigned int irq, unsigned char intassign); -extern int vr41xx_cascade_irq(unsigned int irq, int (*get_irq_number)(int irq)); +extern int cascade_irq(unsigned int irq, int (*get_irq)(unsigned int, struct pt_regs *)); #define PIUINT_COMMAND 0x0040 #define PIUINT_DATA 0x0020 _