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arm64: Implement IRQ masking for kernel

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Signed-off-by: Jaroslaw Pelczar <jarek@jpelczar.com>
Change-Id: I05e41f8cd28834e4bcc9f02b4694a640f460cd17
Reviewed-on: https://review.haiku-os.org/c/haiku/+/1856
Reviewed-by: waddlesplash <waddlesplash@gmail.com>
This commit is contained in:
Jaroslaw Pelczar 2019-09-03 18:19:19 +02:00 committed by waddlesplash
parent a041f1b49c
commit b3a12553f8
1 changed files with 48 additions and 0 deletions
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48
headers/private/kernel/arch/arm64/arch_int.h
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@ -7,9 +7,57 @@
#include <SupportDefs.h>
#include <kernel/arch/arm64/arm_registers.h>
#define NUM_IO_VECTORS 1024
static inline void
arch_int_enable_interrupts_inline(void)
{
__asm__ __volatile__("msr daifclr, #2");
}
static inline int
arch_int_disable_interrupts_inline(void)
{
uint32 flags;
__asm__ __volatile__(
"mrs %0, daif\n\t"
"msr daifset, #2\n\t"
: "=&r"(flags));
return flags;
}
static inline void
arch_int_restore_interrupts_inline(int oldState)
{
WRITE_SPECIALREG(daif, oldState);
}
static inline bool
arch_int_are_interrupts_enabled_inline(void)
{
uint32 flags;
__asm__ __volatile__(
"mrs %0, daif\n\t"
: "=&r"(flags));
return (flags & PSR_I) == 0;
}
// map the functions to the inline versions
#define arch_int_enable_interrupts() arch_int_enable_interrupts_inline()
#define arch_int_disable_interrupts() arch_int_disable_interrupts_inline()
#define arch_int_restore_interrupts(status) \
arch_int_restore_interrupts_inline(status)
#define arch_int_are_interrupts_enabled() \
arch_int_are_interrupts_enabled_inline()
#endif /* _KERNEL_ARCH_ARM64_ARCH_INT_H_ */