+++ /dev/null
-/* MN10300 IRQ flag handling
- *
- * Copyright (C) 2010 Red Hat, Inc. All Rights Reserved.
- * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public Licence
- * as published by the Free Software Foundation; either version
- * 2 of the Licence, or (at your option) any later version.
- */
-
-#ifndef _ASM_IRQFLAGS_H
-#define _ASM_IRQFLAGS_H
-
-#include <asm/cpu-regs.h>
-/* linux/smp.h <- linux/irqflags.h needs asm/smp.h first */
-#include <asm/smp.h>
-
-/*
- * interrupt control
- * - "disabled": run in IM1/2
- * - level 0 - kernel debugger
- * - level 1 - virtual serial DMA (if present)
- * - level 5 - normal interrupt priority
- * - level 6 - timer interrupt
- * - "enabled": run in IM7
- */
-#define MN10300_CLI_LEVEL (CONFIG_LINUX_CLI_LEVEL << EPSW_IM_SHIFT)
-
-#ifndef __ASSEMBLY__
-
-static inline unsigned long arch_local_save_flags(void)
-{
- unsigned long flags;
-
- asm volatile("mov epsw,%0" : "=d"(flags));
- return flags;
-}
-
-static inline void arch_local_irq_disable(void)
-{
- asm volatile(
- " and %0,epsw \n"
- " or %1,epsw \n"
- " nop \n"
- " nop \n"
- " nop \n"
- :
- : "i"(~EPSW_IM), "i"(EPSW_IE | MN10300_CLI_LEVEL)
- : "memory");
-}
-
-static inline unsigned long arch_local_irq_save(void)
-{
- unsigned long flags;
-
- flags = arch_local_save_flags();
- arch_local_irq_disable();
- return flags;
-}
-
-/*
- * we make sure arch_irq_enable() doesn't cause priority inversion
- */
-extern unsigned long __mn10300_irq_enabled_epsw[];
-
-static inline void arch_local_irq_enable(void)
-{
- unsigned long tmp;
- int cpu = raw_smp_processor_id();
-
- asm volatile(
- " mov epsw,%0 \n"
- " and %1,%0 \n"
- " or %2,%0 \n"
- " mov %0,epsw \n"
- : "=&d"(tmp)
- : "i"(~EPSW_IM), "r"(__mn10300_irq_enabled_epsw[cpu])
- : "memory", "cc");
-}
-
-static inline void arch_local_irq_restore(unsigned long flags)
-{
- asm volatile(
- " mov %0,epsw \n"
- " nop \n"
- " nop \n"
- " nop \n"
- :
- : "d"(flags)
- : "memory", "cc");
-}
-
-static inline bool arch_irqs_disabled_flags(unsigned long flags)
-{
- return (flags & (EPSW_IE | EPSW_IM)) != (EPSW_IE | EPSW_IM_7);
-}
-
-static inline bool arch_irqs_disabled(void)
-{
- return arch_irqs_disabled_flags(arch_local_save_flags());
-}
-
-/*
- * Hook to save power by halting the CPU
- * - called from the idle loop
- * - must reenable interrupts (which takes three instruction cycles to complete)
- */
-static inline void arch_safe_halt(void)
-{
-#ifdef CONFIG_SMP
- arch_local_irq_enable();
-#else
- asm volatile(
- " or %0,epsw \n"
- " nop \n"
- " nop \n"
- " bset %2,(%1) \n"
- :
- : "i"(EPSW_IE|EPSW_IM), "n"(&CPUM), "i"(CPUM_SLEEP)
- : "cc");
-#endif
-}
-
-#define __sleep_cpu() \
-do { \
- asm volatile( \
- " bset %1,(%0)\n" \
- "1: btst %1,(%0)\n" \
- " bne 1b\n" \
- : \
- : "i"(&CPUM), "i"(CPUM_SLEEP) \
- : "cc" \
- ); \
-} while (0)
-
-static inline void arch_local_cli(void)
-{
- asm volatile(
- " and %0,epsw \n"
- " nop \n"
- " nop \n"
- " nop \n"
- :
- : "i"(~EPSW_IE)
- : "memory"
- );
-}
-
-static inline unsigned long arch_local_cli_save(void)
-{
- unsigned long flags = arch_local_save_flags();
- arch_local_cli();
- return flags;
-}
-
-static inline void arch_local_sti(void)
-{
- asm volatile(
- " or %0,epsw \n"
- :
- : "i"(EPSW_IE)
- : "memory");
-}
-
-static inline void arch_local_change_intr_mask_level(unsigned long level)
-{
- asm volatile(
- " and %0,epsw \n"
- " or %1,epsw \n"
- :
- : "i"(~EPSW_IM), "i"(EPSW_IE | level)
- : "cc", "memory");
-}
-
-#else /* !__ASSEMBLY__ */
-
-#define LOCAL_SAVE_FLAGS(reg) \
- mov epsw,reg
-
-#define LOCAL_IRQ_DISABLE \
- and ~EPSW_IM,epsw; \
- or EPSW_IE|MN10300_CLI_LEVEL,epsw; \
- nop; \
- nop; \
- nop
-
-#define LOCAL_IRQ_ENABLE \
- or EPSW_IE|EPSW_IM_7,epsw
-
-#define LOCAL_IRQ_RESTORE(reg) \
- mov reg,epsw
-
-#define LOCAL_CLI_SAVE(reg) \
- mov epsw,reg; \
- and ~EPSW_IE,epsw; \
- nop; \
- nop; \
- nop
-
-#define LOCAL_CLI \
- and ~EPSW_IE,epsw; \
- nop; \
- nop; \
- nop
-
-#define LOCAL_STI \
- or EPSW_IE,epsw
-
-#define LOCAL_CHANGE_INTR_MASK_LEVEL(level) \
- and ~EPSW_IM,epsw; \
- or EPSW_IE|(level),epsw
-
-#endif /* __ASSEMBLY__ */
-#endif /* _ASM_IRQFLAGS_H */
git.samba.org / sfrench / cifs-2.6.git / blobdiff