include/asm-ppc/irq_control.h

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 1 /*
 2  * $Id: irq_control.h,v 1.2 1999/07/17 20:23:58 cort Exp $
 3  *
 4  * Copyright (C) 1999 Cort Dougan <cort@cs.nmt.edu>
 5  */
 6 #ifndef _PPC_IRQ_CONTROL_H
 7 #define _PPC_IRQ_CONTROL_H
 8
 9 #include <linux/config.h>
 10
 11 #include <asm/irq.h>
 12 #include <asm/atomic.h>
 13
 14 externvoiddo_lost_interrupts(unsigned long);
 15 extern atomic_t ppc_n_lost_interrupts;
 16
 17 #define __no_use_save_flags(flags) \
 18  ({__asm__ __volatile__ ("mfmsr %0" :"=r" ((flags)) : :"memory"); })
 19
 20 extern __inline__ void__no_use_restore_flags(unsigned long flags)
 21 {
 22 if((flags & MSR_EE) &&atomic_read(&ppc_n_lost_interrupts) !=0) {
 23 do_lost_interrupts(flags);
 24 }else{
 25  __asm__ __volatile__("sync; mtmsr %0; isync"
 26 : :"r"(flags) :"memory");
 27 }
 28 }
 29
 30 extern __inline__ void__no_use_sti(void)
 31 {
 32 unsigned long flags;
 33
 34  __asm__ __volatile__("mfmsr %0":"=r"(flags));
 35  flags |= MSR_EE;
 36 if(atomic_read(&ppc_n_lost_interrupts) )
 37 do_lost_interrupts(flags);
 38  __asm__ __volatile__("sync; mtmsr %0; isync"::"r"(flags));
 39 }
 40
 41 extern __inline__ void__no_use_cli(void)
 42 {
 43 unsigned long flags;
 44  __asm__ __volatile__("mfmsr %0":"=r"(flags));
 45  flags &= ~MSR_EE;
 46  __asm__ __volatile__("sync; mtmsr %0; isync"::"r"(flags));
 47 }
 48
 49 #define __no_use_mask_irq(irq) ({if (irq_desc[irq].ctl && irq_desc[irq].ctl->disable) irq_desc[irq].ctl->disable(irq);})
 50 #define __no_use_unmask_irq(irq) ({if (irq_desc[irq].ctl && irq_desc[irq].ctl->enable) irq_desc[irq].ctl->enable(irq);})
 51 #define __no_use_mask_and_ack_irq(irq) ({if (irq_desc[irq].ctl && irq_desc[irq].ctl->mask_and_ack) irq_desc[irq].ctl->mask_and_ack(irq);})
 52
 53 #ifdef CONFIG_RTL
 54
 55 /* the rtl system provides these -- Cort */
 56 externvoid__sti(void);
 57 externvoid__cli(void);
 58 externvoid__restore_flags(unsigned int);
 59 externunsigned int__return_flags(void);
 60 #define __save_flags(flags) (flags = __return_flags())
 61
 62 #define rtl_hard_cli __no_use_cli
 63 #define rtl_hard_sti __no_use_sti
 64 #define rtl_hard_save_flags(flags) __no_use_save_flags(flags)
 65 #define rtl_hard_restore_flags(flags) __no_use_restore_flags(flags)
 66
 67 #define rtl_hard_mask_irq(irq) __no_use_mask_irq(irq)
 68 #define rtl_hard_unmask_irq(irq) __no_use_unmask_irq(irq)
 69 #define rtl_hard_mask_and_ack_irq(irq) __no_use_mask_and_ack_irq(irq)
 70
 71 #else/* CONFIG_RTL */
 72
 73 #define __cli __no_use_cli
 74 #define __sti __no_use_sti
 75 #define __save_flags(flags) __no_use_save_flags(flags)
 76 #define __restore_flags(flags) __no_use_restore_flags(flags)
 77
 78 #define mask_irq(irq) __no_use_mask_irq(irq)
 79 #define unmask_irq(irq) __no_use_unmask_irq(irq)
 80 #define mask_and_ack_irq(irq) __no_use_mask_and_ack_irq(irq)
 81
 82 #endif/* CONFIG_RTL */
 83
 84 #endif/* _PPC_IRQ_CONTROL_H */