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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
commit57f0f512b273f60d52568b8c6b77e17f5636edc0 (patch)
tree5e910f0e82173f4ef4f51111366a3f1299037a7b /arch/m68k/include/asm/irqflags.h
Initial import
Diffstat (limited to 'arch/m68k/include/asm/irqflags.h')
-rw-r--r--arch/m68k/include/asm/irqflags.h82
1 files changed, 82 insertions, 0 deletions
diff --git a/arch/m68k/include/asm/irqflags.h b/arch/m68k/include/asm/irqflags.h
new file mode 100644
index 000000000..a823cd73d
--- /dev/null
+++ b/arch/m68k/include/asm/irqflags.h
@@ -0,0 +1,82 @@
+#ifndef _M68K_IRQFLAGS_H
+#define _M68K_IRQFLAGS_H
+
+#include <linux/types.h>
+#ifdef CONFIG_MMU
+#include <linux/preempt_mask.h>
+#endif
+#include <linux/preempt.h>
+#include <asm/thread_info.h>
+#include <asm/entry.h>
+
+static inline unsigned long arch_local_save_flags(void)
+{
+ unsigned long flags;
+ asm volatile ("movew %%sr,%0" : "=d" (flags) : : "memory");
+ return flags;
+}
+
+static inline void arch_local_irq_disable(void)
+{
+#ifdef CONFIG_COLDFIRE
+ asm volatile (
+ "move %/sr,%%d0 \n\t"
+ "ori.l #0x0700,%%d0 \n\t"
+ "move %%d0,%/sr \n"
+ : /* no outputs */
+ :
+ : "cc", "%d0", "memory");
+#else
+ asm volatile ("oriw #0x0700,%%sr" : : : "memory");
+#endif
+}
+
+static inline void arch_local_irq_enable(void)
+{
+#if defined(CONFIG_COLDFIRE)
+ asm volatile (
+ "move %/sr,%%d0 \n\t"
+ "andi.l #0xf8ff,%%d0 \n\t"
+ "move %%d0,%/sr \n"
+ : /* no outputs */
+ :
+ : "cc", "%d0", "memory");
+#else
+# if defined(CONFIG_MMU)
+ if (MACH_IS_Q40 || !hardirq_count())
+# endif
+ asm volatile (
+ "andiw %0,%%sr"
+ :
+ : "i" (ALLOWINT)
+ : "memory");
+#endif
+}
+
+static inline unsigned long arch_local_irq_save(void)
+{
+ unsigned long flags = arch_local_save_flags();
+ arch_local_irq_disable();
+ return flags;
+}
+
+static inline void arch_local_irq_restore(unsigned long flags)
+{
+ asm volatile ("movew %0,%%sr" : : "d" (flags) : "memory");
+}
+
+static inline bool arch_irqs_disabled_flags(unsigned long flags)
+{
+ if (MACH_IS_ATARI) {
+ /* Ignore HSYNC = ipl 2 on Atari */
+ return (flags & ~(ALLOWINT | 0x200)) != 0;
+ }
+ return (flags & ~ALLOWINT) != 0;
+}
+
+static inline bool arch_irqs_disabled(void)
+{
+ return arch_irqs_disabled_flags(arch_local_save_flags());
+}
+
+#endif /* _M68K_IRQFLAGS_H */