arch/blackfin/include/asm/irqflags.h

   1 /*
   2  * interface to Blackfin CEC
   3  *
   4  * Copyright 2009 Analog Devices Inc.
   5  * Licensed under the GPL-2 or later.
   6  */
   7
   8 #ifndef __ASM_BFIN_IRQFLAGS_H__
   9 #define __ASM_BFIN_IRQFLAGS_H__
  10
  11 #ifdef CONFIG_SMP
  12 # include <asm/pda.h>
  13 # include <asm/processor.h>
  14 /* Forward decl needed due to cdef inter dependencies */
  15 static inline uint32_t __pure bfin_dspid(void);
  16 # define blackfin_core_id() (bfin_dspid() & 0xff)
  17 # define bfin_irq_flags cpu_pda[blackfin_core_id()].imask
  18 #else
  19 extern unsigned long bfin_irq_flags;
  20 #endif
  21
  22 static inline void bfin_sti(unsigned long flags)
  23 {
  24         asm volatile("sti %0;" : : "d" (flags));
  25 }
  26
  27 static inline unsigned long bfin_cli(void)
  28 {
  29         unsigned long flags;
  30         asm volatile("cli %0;" : "=d" (flags));
  31         return flags;
  32 }
  33
  34 static inline void raw_local_irq_disable(void)
  35 {
  36         bfin_cli();
  37 }
  38 static inline void raw_local_irq_enable(void)
  39 {
  40         bfin_sti(bfin_irq_flags);
  41 }
  42
  43 #define raw_local_save_flags(flags) do { (flags) = bfin_read_IMASK(); } while (0)
  44
  45 #define raw_irqs_disabled_flags(flags) (((flags) & ~0x3f) == 0)
  46
  47 static inline void raw_local_irq_restore(unsigned long flags)
  48 {
  49         if (!raw_irqs_disabled_flags(flags))
  50                 raw_local_irq_enable();
  51 }
  52
  53 static inline unsigned long __raw_local_irq_save(void)
  54 {
  55         unsigned long flags = bfin_cli();
  56 #ifdef CONFIG_DEBUG_HWERR
  57         bfin_sti(0x3f);
  58 #endif
  59         return flags;
  60 }
  61 #define raw_local_irq_save(flags) do { (flags) = __raw_local_irq_save(); } while (0)
  62
  63 #endif