/* 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 */
Name | Type | Size | Permission | Actions |
---|---|---|---|---|
Kbuild | File | 314 B | 0644 |
|
asm-offsets.h | File | 35 B | 0644 |
|
atomic.h | File | 4.02 KB | 0644 |
|
bitops.h | File | 5.42 KB | 0644 |
|
bug.h | File | 864 B | 0644 |
|
bugs.h | File | 561 B | 0644 |
|
busctl-regs.h | File | 7.8 KB | 0644 |
|
cache.h | File | 2.06 KB | 0644 |
|
cacheflush.h | File | 7.6 KB | 0644 |
|
checksum.h | File | 2.09 KB | 0644 |
|
cmpxchg.h | File | 2.65 KB | 0644 |
|
cpu-regs.h | File | 16.61 KB | 0644 |
|
current.h | File | 922 B | 0644 |
|
debugger.h | File | 1.2 KB | 0644 |
|
delay.h | File | 597 B | 0644 |
|
div64.h | File | 3.21 KB | 0644 |
|
dma-mapping.h | File | 636 B | 0644 |
|
dma.h | File | 3.09 KB | 0644 |
|
dmactl-regs.h | File | 532 B | 0644 |
|
elf.h | File | 4.49 KB | 0644 |
|
emergency-restart.h | File | 43 B | 0644 |
|
exceptions.h | File | 4.74 KB | 0644 |
|
fpu.h | File | 3.57 KB | 0644 |
|
frame.inc | File | 2.37 KB | 0644 |
|
ftrace.h | File | 12 B | 0644 |
|
futex.h | File | 31 B | 0644 |
|
gdb-stub.h | File | 5.42 KB | 0644 |
|
hardirq.h | File | 1.68 KB | 0644 |
|
highmem.h | File | 3.01 KB | 0644 |
|
hw_irq.h | File | 483 B | 0644 |
|
intctl-regs.h | File | 2.26 KB | 0644 |
|
io.h | File | 7.67 KB | 0644 |
|
irq.h | File | 1.11 KB | 0644 |
|
irq_regs.h | File | 751 B | 0644 |
|
irqflags.h | File | 4.05 KB | 0644 |
|
kdebug.h | File | 561 B | 0644 |
|
kgdb.h | File | 1.7 KB | 0644 |
|
kmap_types.h | File | 160 B | 0644 |
|
kprobes.h | File | 1.59 KB | 0644 |
|
linkage.h | File | 593 B | 0644 |
|
local.h | File | 31 B | 0644 |
|
local64.h | File | 33 B | 0644 |
|
mc146818rtc.h | File | 26 B | 0644 |
|
mmu.h | File | 434 B | 0644 |
|
mmu_context.h | File | 4.44 KB | 0644 |
|
module.h | File | 677 B | 0644 |
|
nmi.h | File | 500 B | 0644 |
|
page.h | File | 3.63 KB | 0644 |
|
page_offset.h | File | 302 B | 0644 |
|
pci.h | File | 2.17 KB | 0644 |
|
percpu.h | File | 32 B | 0644 |
|
pgalloc.h | File | 1.49 KB | 0644 |
|
pgtable.h | File | 15.68 KB | 0644 |
|
pio-regs.h | File | 7.53 KB | 0644 |
|
processor.h | File | 4.12 KB | 0644 |
|
ptrace.h | File | 805 B | 0644 |
|
reset-regs.h | File | 1.8 KB | 0644 |
|
rtc-regs.h | File | 3.57 KB | 0644 |
|
rtc.h | File | 692 B | 0644 |
|
rwlock.h | File | 2.98 KB | 0644 |
|
serial-regs.h | File | 8.85 KB | 0644 |
|
serial.h | File | 1.02 KB | 0644 |
|
setup.h | File | 574 B | 0644 |
|
shmparam.h | File | 182 B | 0644 |
|
signal.h | File | 888 B | 0644 |
|
smp.h | File | 3.06 KB | 0644 |
|
smsc911x.h | File | 27 B | 0644 |
|
spinlock.h | File | 3.84 KB | 0644 |
|
spinlock_types.h | File | 445 B | 0644 |
|
string.h | File | 1.03 KB | 0644 |
|
switch_to.h | File | 1.49 KB | 0644 |
|
syscall.h | File | 2.38 KB | 0644 |
|
termios.h | File | 387 B | 0644 |
|
thread_info.h | File | 4.36 KB | 0644 |
|
timer-regs.h | File | 20.72 KB | 0644 |
|
timex.h | File | 843 B | 0644 |
|
tlb.h | File | 941 B | 0644 |
|
tlbflush.h | File | 3.45 KB | 0644 |
|
topology.h | File | 34 B | 0644 |
|
types.h | File | 620 B | 0644 |
|
uaccess.h | File | 7.78 KB | 0644 |
|
ucontext.h | File | 673 B | 0644 |
|
unaligned.h | File | 678 B | 0644 |
|
unistd.h | File | 1.34 KB | 0644 |
|
user.h | File | 1.91 KB | 0644 |
|
vga.h | File | 471 B | 0644 |
|
xor.h | File | 29 B | 0644 |
|