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Diffstat (limited to 'src/arch/arm/include/armv7')
-rw-r--r--src/arch/arm/include/armv7/arch/io.h21
1 files changed, 6 insertions, 15 deletions
diff --git a/src/arch/arm/include/armv7/arch/io.h b/src/arch/arm/include/armv7/arch/io.h
index 87797bd0eb..1772659fec 100644
--- a/src/arch/arm/include/armv7/arch/io.h
+++ b/src/arch/arm/include/armv7/arch/io.h
@@ -34,49 +34,40 @@
static inline uint8_t read8(const void *addr)
{
- uint8_t val;
-
dmb();
- asm volatile ("ldrb %0, [%1]" : "=r" (val) : "r" (addr) : "memory");
- return val;
+ return *(volatile uint8_t *)__builtin_assume_aligned(addr, sizeof(uint8_t));
}
static inline uint16_t read16(const void *addr)
{
- uint16_t val;
-
dmb();
- asm volatile ("ldrh %0, [%1]" : "=r" (val) : "r" (addr) : "memory");
- return val;
+ return *(volatile uint16_t *)__builtin_assume_aligned(addr, sizeof(uint16_t));
}
static inline uint32_t read32(const void *addr)
{
- uint32_t val;
-
dmb();
- asm volatile ("ldr %0, [%1]" : "=r" (val) : "r" (addr) : "memory");
- return val;
+ return *(volatile uint32_t *)__builtin_assume_aligned(addr, sizeof(uint32_t));
}
static inline void write8(void *addr, uint8_t val)
{
dmb();
- asm volatile ("strb %0, [%1]" : : "r" (val), "r" (addr) : "memory");
+ *(volatile uint8_t *)__builtin_assume_aligned(addr, sizeof(uint8_t)) = val;
dmb();
}
static inline void write16(void *addr, uint16_t val)
{
dmb();
- asm volatile ("strh %0, [%1]" : : "r" (val), "r" (addr) : "memory");
+ *(volatile uint16_t *)__builtin_assume_aligned(addr, sizeof(uint16_t)) = val;
dmb();
}
static inline void write32(void *addr, uint32_t val)
{
dmb();
- asm volatile ("str %0, [%1]" : : "r" (val), "r" (addr) : "memory");
+ *(volatile uint32_t *)__builtin_assume_aligned(addr, sizeof(uint32_t)) = val;
dmb();
}