X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=arch%2Fppc%2Fsyslib%2Fopen_pic.c;h=70456c8f998c7be7c992cad3ec8c8a61c2959fa4;hb=43bc926fffd92024b46cafaf7350d669ba9ca884;hp=a19f8c2d933eb79095e68f815850c57c1d02d28e;hpb=9bf4aaab3e101692164d49b7ca357651eb691cb6;p=linux-2.6.git diff --git a/arch/ppc/syslib/open_pic.c b/arch/ppc/syslib/open_pic.c index a19f8c2d9..70456c8f9 100644 --- a/arch/ppc/syslib/open_pic.c +++ b/arch/ppc/syslib/open_pic.c @@ -1,6 +1,4 @@ /* - * arch/ppc/kernel/open_pic.c -- OpenPIC Interrupt Handling - * * Copyright (C) 1997 Geert Uytterhoeven * * This file is subject to the terms and conditions of the GNU General Public @@ -13,18 +11,17 @@ #include #include #include -#include #include #include +#include #include #include #include #include -#include #include #include #include -#include +#include #include "open_pic_defs.h" @@ -32,8 +29,8 @@ #define OPENPIC_BIG_ENDIAN #endif -void* OpenPIC_Addr; -static volatile struct OpenPIC *OpenPIC = NULL; +void __iomem *OpenPIC_Addr; +static volatile struct OpenPIC __iomem *OpenPIC = NULL; /* * We define OpenPIC_InitSenses table thusly: @@ -47,13 +44,12 @@ extern int use_of_interrupt_tree; static u_int NumProcessors; static u_int NumSources; static int open_pic_irq_offset; -static volatile OpenPIC_Source *ISR[NR_IRQS]; +static volatile OpenPIC_Source __iomem *ISR[NR_IRQS]; static int openpic_cascade_irq = -1; static int (*openpic_cascade_fn)(struct pt_regs *); /* Global Operations */ static void openpic_disable_8259_pass_through(void); -static void openpic_set_priority(u_int pri); static void openpic_set_spurious(u_int vector); #ifdef CONFIG_SMP @@ -79,7 +75,6 @@ static void openpic_mapirq(u_int irq, cpumask_t cpumask, cpumask_t keepmask); */ #ifdef notused static void openpic_enable_8259_pass_through(void); -static u_int openpic_get_priority(void); static u_int openpic_get_spurious(void); static void openpic_set_sense(u_int irq, int sense); #endif /* notused */ @@ -164,7 +159,7 @@ struct hw_interrupt_type open_pic_ipi = { #define check_arg_cpu(cpu) do {} while (0) #endif -u_int openpic_read(volatile u_int *addr) +u_int openpic_read(volatile u_int __iomem *addr) { u_int val; @@ -176,7 +171,7 @@ u_int openpic_read(volatile u_int *addr) return val; } -static inline void openpic_write(volatile u_int *addr, u_int val) +static inline void openpic_write(volatile u_int __iomem *addr, u_int val) { #ifdef OPENPIC_BIG_ENDIAN out_be32(addr, val); @@ -185,30 +180,30 @@ static inline void openpic_write(volatile u_int *addr, u_int val) #endif } -static inline u_int openpic_readfield(volatile u_int *addr, u_int mask) +static inline u_int openpic_readfield(volatile u_int __iomem *addr, u_int mask) { u_int val = openpic_read(addr); return val & mask; } -inline void openpic_writefield(volatile u_int *addr, u_int mask, +inline void openpic_writefield(volatile u_int __iomem *addr, u_int mask, u_int field) { u_int val = openpic_read(addr); openpic_write(addr, (val & ~mask) | (field & mask)); } -static inline void openpic_clearfield(volatile u_int *addr, u_int mask) +static inline void openpic_clearfield(volatile u_int __iomem *addr, u_int mask) { openpic_writefield(addr, mask, 0); } -static inline void openpic_setfield(volatile u_int *addr, u_int mask) +static inline void openpic_setfield(volatile u_int __iomem *addr, u_int mask) { openpic_writefield(addr, mask, mask); } -static void openpic_safe_writefield(volatile u_int *addr, u_int mask, +static void openpic_safe_writefield(volatile u_int __iomem *addr, u_int mask, u_int field) { openpic_setfield(addr, OPENPIC_MASK); @@ -218,10 +213,10 @@ static void openpic_safe_writefield(volatile u_int *addr, u_int mask, #ifdef CONFIG_SMP /* yes this is right ... bug, feature, you decide! -- tgall */ -u_int openpic_read_IPI(volatile u_int* addr) +u_int openpic_read_IPI(volatile u_int __iomem * addr) { u_int val = 0; -#if defined(OPENPIC_BIG_ENDIAN) || defined(CONFIG_POWER3) +#if defined(OPENPIC_BIG_ENDIAN) val = in_be32(addr); #else val = in_le32(addr); @@ -230,23 +225,23 @@ u_int openpic_read_IPI(volatile u_int* addr) } /* because of the power3 be / le above, this is needed */ -inline void openpic_writefield_IPI(volatile u_int* addr, u_int mask, u_int field) +inline void openpic_writefield_IPI(volatile u_int __iomem * addr, u_int mask, u_int field) { u_int val = openpic_read_IPI(addr); openpic_write(addr, (val & ~mask) | (field & mask)); } -static inline void openpic_clearfield_IPI(volatile u_int *addr, u_int mask) +static inline void openpic_clearfield_IPI(volatile u_int __iomem *addr, u_int mask) { openpic_writefield_IPI(addr, mask, 0); } -static inline void openpic_setfield_IPI(volatile u_int *addr, u_int mask) +static inline void openpic_setfield_IPI(volatile u_int __iomem *addr, u_int mask) { openpic_writefield_IPI(addr, mask, mask); } -static void openpic_safe_writefield_IPI(volatile u_int *addr, u_int mask, u_int field) +static void openpic_safe_writefield_IPI(volatile u_int __iomem *addr, u_int mask, u_int field) { openpic_setfield_IPI(addr, OPENPIC_MASK); @@ -261,6 +256,9 @@ static void openpic_safe_writefield_IPI(volatile u_int *addr, u_int mask, u_int #endif /* CONFIG_SMP */ #ifdef CONFIG_EPIC_SERIAL_MODE +/* On platforms that may use EPIC serial mode, the default is enabled. */ +int epic_serial_mode = 1; + static void __init openpic_eicr_set_clk(u_int clkval) { openpic_writefield(&OpenPIC->Global.Global_Configuration1, @@ -274,7 +272,7 @@ static void __init openpic_enable_sie(void) } #endif -#if defined(CONFIG_EPIC_SERIAL_MODE) || defined(CONFIG_PM) +#if defined(CONFIG_EPIC_SERIAL_MODE) static void openpic_reset(void) { openpic_setfield(&OpenPIC->Global.Global_Configuration0, @@ -285,16 +283,16 @@ static void openpic_reset(void) } #endif -void __init openpic_set_sources(int first_irq, int num_irqs, void *first_ISR) +void __init openpic_set_sources(int first_irq, int num_irqs, void __iomem *first_ISR) { - volatile OpenPIC_Source *src = first_ISR; + volatile OpenPIC_Source __iomem *src = first_ISR; int i, last_irq; last_irq = first_irq + num_irqs; if (last_irq > NumSources) NumSources = last_irq; if (src == 0) - src = &((struct OpenPIC *)OpenPIC_Addr)->Source[first_irq]; + src = &((struct OpenPIC __iomem *)OpenPIC_Addr)->Source[first_irq]; for (i = first_irq; i < last_irq; ++i, ++src) ISR[i] = src; } @@ -316,7 +314,7 @@ void __init openpic_init(int offset) printk("No OpenPIC found !\n"); return; } - OpenPIC = (volatile struct OpenPIC *)OpenPIC_Addr; + OpenPIC = (volatile struct OpenPIC __iomem *)OpenPIC_Addr; #ifdef CONFIG_EPIC_SERIAL_MODE /* Have to start from ground zero. @@ -370,8 +368,9 @@ void __init openpic_init(int offset) /* Initialize IPI interrupts */ if ( ppc_md.progress ) ppc_md.progress("openpic: ipi",0x3bb); for (i = 0; i < OPENPIC_NUM_IPI; i++) { - /* Disabled, Priority 10..13 */ - openpic_initipi(i, 10+i, OPENPIC_VEC_IPI+i+offset); + /* Disabled, increased priorities 10..13 */ + openpic_initipi(i, OPENPIC_PRIORITY_IPI_BASE+i, + OPENPIC_VEC_IPI+i+offset); /* IPIs are per-CPU */ irq_desc[OPENPIC_VEC_IPI+i+offset].status |= IRQ_PER_CPU; irq_desc[OPENPIC_VEC_IPI+i+offset].handler = &open_pic_ipi; @@ -399,8 +398,9 @@ void __init openpic_init(int offset) if (sense & IRQ_SENSE_MASK) irq_desc[i+offset].status = IRQ_LEVEL; - /* Enabled, Priority 8 */ - openpic_initirq(i, 8, i+offset, (sense & IRQ_POLARITY_MASK), + /* Enabled, Default priority */ + openpic_initirq(i, OPENPIC_PRIORITY_DEFAULT, i+offset, + (sense & IRQ_POLARITY_MASK), (sense & IRQ_SENSE_MASK)); /* Processor 0 */ openpic_mapirq(i, CPU_MASK_CPU0, CPU_MASK_NONE); @@ -412,11 +412,13 @@ void __init openpic_init(int offset) /* Initialize the spurious interrupt */ if (ppc_md.progress) ppc_md.progress("openpic: spurious",0x3bd); - openpic_set_spurious(OPENPIC_VEC_SPURIOUS+offset); + openpic_set_spurious(OPENPIC_VEC_SPURIOUS); openpic_disable_8259_pass_through(); #ifdef CONFIG_EPIC_SERIAL_MODE - openpic_eicr_set_clk(7); /* Slowest value until we know better */ - openpic_enable_sie(); + if (epic_serial_mode) { + openpic_eicr_set_clk(7); /* Slowest value until we know better */ + openpic_enable_sie(); + } #endif openpic_set_priority(0); @@ -461,8 +463,7 @@ void openpic_eoi(void) (void)openpic_read(&OpenPIC->THIS_CPU.EOI); } -#ifdef notused -static u_int openpic_get_priority(void) +u_int openpic_get_priority(void) { DECL_THIS_CPU; @@ -470,9 +471,8 @@ static u_int openpic_get_priority(void) return openpic_readfield(&OpenPIC->THIS_CPU.Current_Task_Priority, OPENPIC_CURRENT_TASK_PRIORITY_MASK); } -#endif /* notused */ -static void __init openpic_set_priority(u_int pri) +void openpic_set_priority(u_int pri) { DECL_THIS_CPU; @@ -527,7 +527,7 @@ void openpic_reset_processor_phys(u_int mask) } #if defined(CONFIG_SMP) || defined(CONFIG_PM) -static spinlock_t openpic_setup_lock = SPIN_LOCK_UNLOCKED; +static DEFINE_SPINLOCK(openpic_setup_lock); #endif #ifdef CONFIG_SMP @@ -556,12 +556,10 @@ static void __init openpic_initipi(u_int ipi, u_int pri, u_int vec) */ void openpic_cause_IPI(u_int ipi, cpumask_t cpumask) { - cpumask_t phys; DECL_THIS_CPU; CHECK_THIS_CPU; check_arg_ipi(ipi); - phys = physmask(cpumask); openpic_write(&OpenPIC->THIS_CPU.IPI_Dispatch(ipi), cpus_addr(physmask(cpumask))[0]); } @@ -657,6 +655,18 @@ static void __init openpic_maptimer(u_int timer, cpumask_t cpumask) cpus_addr(phys)[0]); } +/* + * Change the priority of an interrupt + */ +void __init +openpic_set_irq_priority(u_int irq, u_int pri) +{ + check_arg_irq(irq); + openpic_safe_writefield(&ISR[irq - open_pic_irq_offset]->Vector_Priority, + OPENPIC_PRIORITY_MASK, + pri << OPENPIC_PRIORITY_SHIFT); +} + /* * Initalize the interrupt source which will generate an NMI. * This raises the interrupt's priority from 8 to 9. @@ -667,9 +677,7 @@ void __init openpic_init_nmi_irq(u_int irq) { check_arg_irq(irq); - openpic_safe_writefield(&ISR[irq - open_pic_irq_offset]->Vector_Priority, - OPENPIC_PRIORITY_MASK, - 9 << OPENPIC_PRIORITY_SHIFT); + openpic_set_irq_priority(irq, OPENPIC_PRIORITY_NMI); } /* @@ -681,13 +689,21 @@ openpic_init_nmi_irq(u_int irq) /* * Hookup a cascade to the OpenPIC. */ + +static struct irqaction openpic_cascade_irqaction = { + .handler = no_action, + .flags = SA_INTERRUPT, + .mask = CPU_MASK_NONE, +}; + void __init openpic_hookup_cascade(u_int irq, char *name, int (*cascade_fn)(struct pt_regs *)) { openpic_cascade_irq = irq; openpic_cascade_fn = cascade_fn; - if (request_irq(irq, no_action, SA_INTERRUPT, name, NULL)) + + if (setup_irq(irq, &openpic_cascade_irqaction)) printk("Unable to get OpenPIC IRQ %d for cascade\n", irq - open_pic_irq_offset); } @@ -699,7 +715,7 @@ openpic_hookup_cascade(u_int irq, char *name, */ static void openpic_enable_irq(u_int irq) { - volatile u_int *vpp; + volatile u_int __iomem *vpp; check_arg_irq(irq); vpp = &ISR[irq - open_pic_irq_offset]->Vector_Priority; @@ -712,7 +728,7 @@ static void openpic_enable_irq(u_int irq) static void openpic_disable_irq(u_int irq) { - volatile u_int *vpp; + volatile u_int __iomem *vpp; u32 vp; check_arg_irq(irq); @@ -865,14 +881,14 @@ openpic_get_irq(struct pt_regs *regs) irq = cirq; openpic_eoi(); } - } else if (irq == OPENPIC_VEC_SPURIOUS + open_pic_irq_offset) + } else if (irq == OPENPIC_VEC_SPURIOUS) irq = -1; return irq; } #ifdef CONFIG_SMP void -smp_openpic_message_pass(int target, int msg, unsigned long data, int wait) +smp_openpic_message_pass(int target, int msg) { cpumask_t mask = CPU_MASK_ALL; /* make sure we're sending something that translates to an IPI */ @@ -930,7 +946,7 @@ static void openpic_cached_disable_irq(u_int irq) * we need something better to deal with that... Maybe switch to S1 for * cpufreq changes */ -int openpic_suspend(struct sys_device *sysdev, u32 state) +int openpic_suspend(struct sys_device *sysdev, pm_message_t state) { int i; unsigned long flags; @@ -942,6 +958,8 @@ int openpic_suspend(struct sys_device *sysdev, u32 state) return 0; } + openpic_set_priority(0xf); + open_pic.enable = openpic_cached_enable_irq; open_pic.disable = openpic_cached_disable_irq; @@ -984,13 +1002,11 @@ int openpic_resume(struct sys_device *sysdev) return 0; } - openpic_reset(); - /* OpenPIC sometimes seem to need some time to be fully back up... */ do { - openpic_set_spurious(OPENPIC_VEC_SPURIOUS+open_pic_irq_offset); + openpic_set_spurious(OPENPIC_VEC_SPURIOUS); } while(openpic_readfield(&OpenPIC->Global.Spurious_Vector, OPENPIC_VECTOR_MASK) - != (OPENPIC_VEC_SPURIOUS + open_pic_irq_offset)); + != OPENPIC_VEC_SPURIOUS); openpic_disable_8259_pass_through(); @@ -1015,6 +1031,8 @@ int openpic_resume(struct sys_device *sysdev) open_pic.enable = openpic_enable_irq; open_pic.disable = openpic_disable_irq; + openpic_set_priority(0); + spin_unlock_irqrestore(&openpic_setup_lock, flags); return 0;