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| author | Vijaya Kumar K <Vijaya.Kumar@caviumnetworks.com> | 2014-01-28 11:20:17 +0000 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2014-02-26 11:16:25 +0000 |
| commit | c7db4ff5d2b459a579d348532a92fd5885520ce6 (patch) | |
| tree | 9fefbee341d75961e42aecf97267e450c3b46e6e /arch/arm64/include/asm/irqflags.h | |
| parent | cfbf8d4857c26a8a307fb7cd258074c9dcd8c691 (diff) | |
| download | linux-c7db4ff5d2b459a579d348532a92fd5885520ce6.tar.bz2 | |
arm64: Add macros to manage processor debug state
Add macros to enable and disable to manage PSTATE.D
for debugging. The macros local_dbg_save and local_dbg_restore
are moved to irqflags.h file
KGDB boot tests fail because of PSTATE.D is masked.
unmask it for debugging support
Signed-off-by: Vijaya Kumar K <Vijaya.Kumar@caviumnetworks.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm64/include/asm/irqflags.h')
| -rw-r--r-- | arch/arm64/include/asm/irqflags.h | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/irqflags.h b/arch/arm64/include/asm/irqflags.h index b2fcfbc51ecc..11cc941bd107 100644 --- a/arch/arm64/include/asm/irqflags.h +++ b/arch/arm64/include/asm/irqflags.h @@ -90,5 +90,28 @@ static inline int arch_irqs_disabled_flags(unsigned long flags) return flags & PSR_I_BIT; } +/* + * save and restore debug state + */ +#define local_dbg_save(flags) \ + do { \ + typecheck(unsigned long, flags); \ + asm volatile( \ + "mrs %0, daif // local_dbg_save\n" \ + "msr daifset, #8" \ + : "=r" (flags) : : "memory"); \ + } while (0) + +#define local_dbg_restore(flags) \ + do { \ + typecheck(unsigned long, flags); \ + asm volatile( \ + "msr daif, %0 // local_dbg_restore\n" \ + : : "r" (flags) : "memory"); \ + } while (0) + +#define local_dbg_enable() asm("msr daifclr, #8" : : : "memory") +#define local_dbg_disable() asm("msr daifset, #8" : : : "memory") + #endif #endif |