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arm/arm64: add 64bit read/write APIs

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Added sys_read64() and sys_write64() for 64bit operations.

Signed-off-by: Jiafei Pan <Jiafei.Pan@nxp.com>
This commit is contained in:
Jiafei Pan 2021-09-03 16:56:46 +08:00 • committed by Anas Nashif
commit ae82738e71
1 changed files with 16 additions and 0 deletions
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16
include/arch/arm64/sys_io.h
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@ -81,6 +81,22 @@ static ALWAYS_INLINE void sys_write32(uint32_t data, mem_addr_t addr)
__asm__ volatile("str %w0, [%1]" : : "r" (data), "r" (addr));
}
static ALWAYS_INLINE uint64_t sys_read64(mem_addr_t addr)
{
uint64_t val;
__asm__ volatile("ldr %x0, [%1]" : "=r" (val) : "r" (addr));
__DMB();
return val;
}
static ALWAYS_INLINE void sys_write64(uint64_t data, mem_addr_t addr)
{
__DMB();
__asm__ volatile("str %x0, [%1]" : : "r" (data), "r" (addr));
}
#ifdef __cplusplus
}
#endif