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/* Portions taken from Linux arch arm */
#ifndef __ASM_ARM32_SYSTEM_H
#define __ASM_ARM32_SYSTEM_H
#include <asm/arm32/cmpxchg.h>
#define local_irq_disable() asm volatile ( "cpsid i @ local_irq_disable\n" : : : "cc" )
#define local_irq_enable() asm volatile ( "cpsie i @ local_irq_enable\n" : : : "cc" )
#define local_save_flags(x) \
({ \
BUILD_BUG_ON(sizeof(x) != sizeof(long)); \
asm volatile ( "mrs %0, cpsr @ local_save_flags\n" \
: "=r" (x) :: "memory", "cc" ); \
})
#define local_irq_save(x) \
({ \
local_save_flags(x); \
local_irq_disable(); \
})
#define local_irq_restore(x) \
({ \
BUILD_BUG_ON(sizeof(x) != sizeof(long)); \
asm volatile ( \
"msr cpsr_c, %0 @ local_irq_restore\n" \
: \
: "r" (x) \
: "memory", "cc"); \
})
static inline int local_irq_is_enabled(void)
{
unsigned long flags;
local_save_flags(flags);
return !(flags & PSR_IRQ_MASK);
}
#define local_fiq_enable() __asm__("cpsie f @ __stf\n" : : : "memory", "cc")
#define local_fiq_disable() __asm__("cpsid f @ __clf\n" : : : "memory", "cc")
#define local_abort_enable() __asm__("cpsie a @ __sta\n" : : : "memory", "cc")
#define local_abort_disable() __asm__("cpsid a @ __sta\n" : : : "memory", "cc")
static inline int local_fiq_is_enabled(void)
{
unsigned long flags;
local_save_flags(flags);
return !(flags & PSR_FIQ_MASK);
}
#define CSDB ".inst 0xe320f014"
static inline unsigned long array_index_mask_nospec(unsigned long idx,
unsigned long sz)
{
unsigned long mask;
asm volatile( "cmp %1, %2\n"
"sbc %0, %1, %1\n"
CSDB
: "=r" (mask)
: "r" (idx), "Ir" (sz)
: "cc" );
return mask;
}
#define array_index_mask_nospec array_index_mask_nospec
#endif
/*
* Local variables:
* mode: C
* c-file-style: "BSD"
* c-basic-offset: 4
* indent-tabs-mode: nil
* End:
*/
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