Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 1999 Cort Dougan <cort@cs.nmt.edu> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3 | */ |
Kumar Gala | b671ad2 | 2005-09-21 16:52:55 -0500 | [diff] [blame] | 4 | #ifndef _ASM_POWERPC_HW_IRQ_H |
| 5 | #define _ASM_POWERPC_HW_IRQ_H |
| 6 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7 | #ifdef __KERNEL__ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 8 | |
| 9 | #include <linux/config.h> |
| 10 | #include <linux/errno.h> |
Kumar Gala | b671ad2 | 2005-09-21 16:52:55 -0500 | [diff] [blame] | 11 | #include <asm/ptrace.h> |
| 12 | #include <asm/processor.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | #include <asm/irq.h> |
| 14 | |
Kumar Gala | c7aeffc | 2005-09-19 09:30:27 -0500 | [diff] [blame] | 15 | extern void timer_interrupt(struct pt_regs *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 16 | extern void ppc_irq_dispatch_handler(struct pt_regs *regs, int irq); |
| 17 | |
| 18 | #ifdef CONFIG_PPC_ISERIES |
| 19 | |
| 20 | extern unsigned long local_get_flags(void); |
| 21 | extern unsigned long local_irq_disable(void); |
| 22 | extern void local_irq_restore(unsigned long); |
| 23 | |
| 24 | #define local_irq_enable() local_irq_restore(1) |
| 25 | #define local_save_flags(flags) ((flags) = local_get_flags()) |
| 26 | #define local_irq_save(flags) ((flags) = local_irq_disable()) |
| 27 | |
| 28 | #define irqs_disabled() (local_get_flags() == 0) |
| 29 | |
| 30 | #else |
| 31 | |
Kumar Gala | b671ad2 | 2005-09-21 16:52:55 -0500 | [diff] [blame] | 32 | #if defined(CONFIG_BOOKE) |
| 33 | #define SET_MSR_EE(x) mtmsr(x) |
| 34 | #define local_irq_restore(flags) __asm__ __volatile__("wrtee %0" : : "r" (flags) : "memory") |
| 35 | #elif defined(__powerpc64__) |
| 36 | #define SET_MSR_EE(x) __mtmsrd(x, 1) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | #define local_irq_restore(flags) do { \ |
| 38 | __asm__ __volatile__("": : :"memory"); \ |
| 39 | __mtmsrd((flags), 1); \ |
| 40 | } while(0) |
Kumar Gala | b671ad2 | 2005-09-21 16:52:55 -0500 | [diff] [blame] | 41 | #else |
| 42 | #define SET_MSR_EE(x) mtmsr(x) |
| 43 | #define local_irq_restore(flags) mtmsr(flags) |
| 44 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | |
| 46 | static inline void local_irq_disable(void) |
| 47 | { |
Kumar Gala | b671ad2 | 2005-09-21 16:52:55 -0500 | [diff] [blame] | 48 | #ifdef CONFIG_BOOKE |
| 49 | __asm__ __volatile__("wrteei 0": : :"memory"); |
| 50 | #else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | unsigned long msr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | __asm__ __volatile__("": : :"memory"); |
Kumar Gala | b671ad2 | 2005-09-21 16:52:55 -0500 | [diff] [blame] | 53 | msr = mfmsr(); |
| 54 | SET_MSR_EE(msr & ~MSR_EE); |
| 55 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | } |
| 57 | |
| 58 | static inline void local_irq_enable(void) |
| 59 | { |
Kumar Gala | b671ad2 | 2005-09-21 16:52:55 -0500 | [diff] [blame] | 60 | #ifdef CONFIG_BOOKE |
| 61 | __asm__ __volatile__("wrteei 1": : :"memory"); |
| 62 | #else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | unsigned long msr; |
| 64 | __asm__ __volatile__("": : :"memory"); |
| 65 | msr = mfmsr(); |
Kumar Gala | b671ad2 | 2005-09-21 16:52:55 -0500 | [diff] [blame] | 66 | SET_MSR_EE(msr | MSR_EE); |
| 67 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | } |
| 69 | |
Kumar Gala | b671ad2 | 2005-09-21 16:52:55 -0500 | [diff] [blame] | 70 | static inline void local_irq_save_ptr(unsigned long *flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 71 | { |
| 72 | unsigned long msr; |
| 73 | msr = mfmsr(); |
| 74 | *flags = msr; |
Kumar Gala | b671ad2 | 2005-09-21 16:52:55 -0500 | [diff] [blame] | 75 | #ifdef CONFIG_BOOKE |
| 76 | __asm__ __volatile__("wrteei 0": : :"memory"); |
| 77 | #else |
| 78 | SET_MSR_EE(msr & ~MSR_EE); |
| 79 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | __asm__ __volatile__("": : :"memory"); |
| 81 | } |
| 82 | |
Kumar Gala | b671ad2 | 2005-09-21 16:52:55 -0500 | [diff] [blame] | 83 | #define local_save_flags(flags) ((flags) = mfmsr()) |
| 84 | #define local_irq_save(flags) local_irq_save_ptr(&flags) |
| 85 | #define irqs_disabled() ((mfmsr() & MSR_EE) == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | |
| 87 | #endif /* CONFIG_PPC_ISERIES */ |
| 88 | |
| 89 | #define mask_irq(irq) \ |
| 90 | ({ \ |
| 91 | irq_desc_t *desc = get_irq_desc(irq); \ |
| 92 | if (desc->handler && desc->handler->disable) \ |
| 93 | desc->handler->disable(irq); \ |
| 94 | }) |
| 95 | #define unmask_irq(irq) \ |
| 96 | ({ \ |
| 97 | irq_desc_t *desc = get_irq_desc(irq); \ |
| 98 | if (desc->handler && desc->handler->enable) \ |
| 99 | desc->handler->enable(irq); \ |
| 100 | }) |
| 101 | #define ack_irq(irq) \ |
| 102 | ({ \ |
| 103 | irq_desc_t *desc = get_irq_desc(irq); \ |
| 104 | if (desc->handler && desc->handler->ack) \ |
| 105 | desc->handler->ack(irq); \ |
| 106 | }) |
| 107 | |
| 108 | /* Should we handle this via lost interrupts and IPIs or should we don't care like |
| 109 | * we do now ? --BenH. |
| 110 | */ |
| 111 | struct hw_interrupt_type; |
| 112 | static inline void hw_resend_irq(struct hw_interrupt_type *h, unsigned int i) {} |
Kumar Gala | b671ad2 | 2005-09-21 16:52:55 -0500 | [diff] [blame] | 113 | |
| 114 | #endif /* __KERNEL__ */ |
| 115 | #endif /* _ASM_POWERPC_HW_IRQ_H */ |