/* FR-V interrupt 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 /* * interrupt flag manipulation * - use virtual interrupt management since touching the PSR is slow * - ICC2.Z: T if interrupts virtually disabled * - ICC2.C: F if interrupts really disabled * - if Z==1 upon interrupt: * - C is set to 0 * - interrupts are really disabled * - entry.S returns immediately * - uses TIHI (TRAP if Z==0 && C==0) #2 to really reenable interrupts * - if taken, the trap: * - sets ICC2.C * - enables interrupts */ static inline void arch_local_irq_disable(void) { /* set Z flag, but don't change the C flag */ asm volatile(" andcc gr0,gr0,gr0,icc2 \n" : : : "memory", "icc2" ); } static inline void arch_local_irq_enable(void) { /* clear Z flag and then test the C flag */ asm volatile(" oricc gr0,#1,gr0,icc2 \n" " tihi icc2,gr0,#2 \n" : : : "memory", "icc2" ); } static inline unsigned long arch_local_save_flags(void) { unsigned long flags; asm volatile("movsg ccr,%0" : "=r"(flags) : : "memory"); /* shift ICC2.Z to bit 0 */ flags >>= 26; /* make flags 1 if interrupts disabled, 0 otherwise */ return flags & 1UL; } 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) { /* load the Z flag by turning 1 if disabled into 0 if disabled * and thus setting the Z flag but not the C flag */ asm volatile(" xoricc %0,#1,gr0,icc2 \n" /* then trap if Z=0 and C=0 */ " tihi icc2,gr0,#2 \n" : : "r"(flags) : "memory", "icc2" ); } static inline bool arch_irqs_disabled_flags(unsigned long flags) { return flags; } static inline bool arch_irqs_disabled(void) { return arch_irqs_disabled_flags(arch_local_save_flags()); } /* * real interrupt flag manipulation */ #define __arch_local_irq_disable() \ do { \ unsigned long psr; \ asm volatile(" movsg psr,%0 \n" \ " andi %0,%2,%0 \n" \ " ori %0,%1,%0 \n" \ " movgs %0,psr \n" \ : "=r"(psr) \ : "i" (PSR_PIL_14), "i" (~PSR_PIL) \ : "memory"); \ } while (0) #define __arch_local_irq_enable() \ do { \ unsigned long psr; \ asm volatile(" movsg psr,%0 \n" \ " andi %0,%1,%0 \n" \ " movgs %0,psr \n" \ : "=r"(psr) \ : "i" (~PSR_PIL) \ : "memory"); \ } while (0) #define __arch_local_save_flags(flags) \ do { \ typecheck(unsigned long, flags); \ asm("movsg psr,%0" \ : "=r"(flags) \ : \ : "memory"); \ } while (0) #define __arch_local_irq_save(flags) \ do { \ unsigned long npsr; \ typecheck(unsigned long, flags); \ asm volatile(" movsg psr,%0 \n" \ " andi %0,%3,%1 \n" \ " ori %1,%2,%1 \n" \ " movgs %1,psr \n" \ : "=r"(flags), "=r"(npsr) \ : "i" (PSR_PIL_14), "i" (~PSR_PIL) \ : "memory"); \ } while (0) #define __arch_local_irq_restore(flags) \ do { \ typecheck(unsigned long, flags); \ asm volatile(" movgs %0,psr \n" \ : \ : "r" (flags) \ : "memory"); \ } while (0) #define __arch_irqs_disabled() \ ((__get_PSR() & PSR_PIL) >= PSR_PIL_14) #endif /* _ASM_IRQFLAGS_H */
Name | Type | Size | Permission | Actions |
---|---|---|---|---|
Kbuild | File | 290 B | 0644 |
|
asm-offsets.h | File | 35 B | 0644 |
|
atomic.h | File | 4.97 KB | 0644 |
|
atomic_defs.h | File | 4.66 KB | 0644 |
|
ax88796.h | File | 751 B | 0644 |
|
barrier.h | File | 720 B | 0644 |
|
bitops.h | File | 7.12 KB | 0644 |
|
bug.h | File | 1.36 KB | 0644 |
|
bugs.h | File | 445 B | 0644 |
|
busctl-regs.h | File | 2.02 KB | 0644 |
|
cache.h | File | 727 B | 0644 |
|
cacheflush.h | File | 3.05 KB | 0644 |
|
checksum.h | File | 4.53 KB | 0644 |
|
cmpxchg.h | File | 4.56 KB | 0644 |
|
cpu-irqs.h | File | 2.59 KB | 0644 |
|
current.h | File | 685 B | 0644 |
|
delay.h | File | 1.28 KB | 0644 |
|
div64.h | File | 31 B | 0644 |
|
dm9000.h | File | 1.12 KB | 0644 |
|
dma-mapping.h | File | 448 B | 0644 |
|
dma.h | File | 3.63 KB | 0644 |
|
elf.h | File | 5.18 KB | 0644 |
|
emergency-restart.h | File | 149 B | 0644 |
|
fpu.h | File | 261 B | 0644 |
|
ftrace.h | File | 12 B | 0644 |
|
futex.h | File | 416 B | 0644 |
|
gdb-stub.h | File | 4.47 KB | 0644 |
|
gpio-regs.h | File | 3.64 KB | 0644 |
|
hardirq.h | File | 666 B | 0644 |
|
highmem.h | File | 4.09 KB | 0644 |
|
hw_irq.h | File | 484 B | 0644 |
|
io.h | File | 9.75 KB | 0644 |
|
irc-regs.h | File | 1.78 KB | 0644 |
|
irq.h | File | 760 B | 0644 |
|
irq_regs.h | File | 764 B | 0644 |
|
irqflags.h | File | 3.71 KB | 0644 |
|
kdebug.h | File | 32 B | 0644 |
|
kmap_types.h | File | 123 B | 0644 |
|
linkage.h | File | 114 B | 0644 |
|
local.h | File | 140 B | 0644 |
|
local64.h | File | 33 B | 0644 |
|
math-emu.h | File | 6.38 KB | 0644 |
|
mb-regs.h | File | 6.94 KB | 0644 |
|
mb86943a.h | File | 1.84 KB | 0644 |
|
mb93091-fpga-irqs.h | File | 1.06 KB | 0644 |
|
mb93093-fpga-irqs.h | File | 789 B | 0644 |
|
mb93493-irqs.h | File | 1.69 KB | 0644 |
|
mb93493-regs.h | File | 12.46 KB | 0644 |
|
mem-layout.h | File | 2.21 KB | 0644 |
|
mmu.h | File | 1.26 KB | 0644 |
|
mmu_context.h | File | 1.38 KB | 0644 |
|
module.h | File | 617 B | 0644 |
|
page.h | File | 2.08 KB | 0644 |
|
pci.h | File | 1.23 KB | 0644 |
|
percpu.h | File | 147 B | 0644 |
|
perf_event.h | File | 487 B | 0644 |
|
pgalloc.h | File | 1.87 KB | 0644 |
|
pgtable.h | File | 16.02 KB | 0644 |
|
processor.h | File | 2.85 KB | 0644 |
|
ptrace.h | File | 1.2 KB | 0644 |
|
sections.h | File | 1.1 KB | 0644 |
|
segment.h | File | 1.08 KB | 0644 |
|
serial-regs.h | File | 1.63 KB | 0644 |
|
serial.h | File | 308 B | 0644 |
|
setup.h | File | 641 B | 0644 |
|
shmparam.h | File | 183 B | 0644 |
|
signal.h | File | 141 B | 0644 |
|
smp.h | File | 139 B | 0644 |
|
spinlock.h | File | 516 B | 0644 |
|
spr-regs.h | File | 17.93 KB | 0644 |
|
string.h | File | 1.36 KB | 0644 |
|
switch_to.h | File | 1.07 KB | 0644 |
|
syscall.h | File | 2.73 KB | 0644 |
|
termios.h | File | 425 B | 0644 |
|
thread_info.h | File | 3.48 KB | 0644 |
|
timer-regs.h | File | 3.63 KB | 0644 |
|
timex.h | File | 720 B | 0644 |
|
tlb.h | File | 615 B | 0644 |
|
tlbflush.h | File | 1.88 KB | 0644 |
|
topology.h | File | 229 B | 0644 |
|
types.h | File | 595 B | 0644 |
|
uaccess.h | File | 6.79 KB | 0644 |
|
ucontext.h | File | 281 B | 0644 |
|
unaligned.h | File | 694 B | 0644 |
|
unistd.h | File | 928 B | 0644 |
|
user.h | File | 3.29 KB | 0644 |
|
vga.h | File | 464 B | 0644 |
|
virtconvert.h | File | 1.09 KB | 0644 |
|
xor.h | File | 29 B | 0644 |
|