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-rw-r--r--src/arch/arm/include/armv7/arch/io.h21
1 files changed, 15 insertions, 6 deletions
diff --git a/src/arch/arm/include/armv7/arch/io.h b/src/arch/arm/include/armv7/arch/io.h
index 9d060032e9..94cb1312ad 100644
--- a/src/arch/arm/include/armv7/arch/io.h
+++ b/src/arch/arm/include/armv7/arch/io.h
@@ -29,40 +29,49 @@
static inline uint8_t read8(const void *addr)
{
+ uint8_t val;
+
dmb();
- return *(volatile uint8_t *)addr;
+ asm volatile ("ldrb %0, [%1]" : "=r" (val) : "r" (addr) : "memory");
+ return val;
}
static inline uint16_t read16(const void *addr)
{
+ uint16_t val;
+
dmb();
- return *(volatile uint16_t *)addr;
+ asm volatile ("ldrh %0, [%1]" : "=r" (val) : "r" (addr) : "memory");
+ return val;
}
static inline uint32_t read32(const void *addr)
{
+ uint32_t val;
+
dmb();
- return *(volatile uint32_t *)addr;
+ asm volatile ("ldr %0, [%1]" : "=r" (val) : "r" (addr) : "memory");
+ return val;
}
static inline void write8(void *addr, uint8_t val)
{
dmb();
- *(volatile uint8_t *)addr = val;
+ asm volatile ("strb %0, [%1]" : : "r" (val), "r" (addr) : "memory");
dmb();
}
static inline void write16(void *addr, uint16_t val)
{
dmb();
- *(volatile uint16_t *)addr = val;
+ asm volatile ("strh %0, [%1]" : : "r" (val), "r" (addr) : "memory");
dmb();
}
static inline void write32(void *addr, uint32_t val)
{
dmb();
- *(volatile uint32_t *)addr = val;
+ asm volatile ("str %0, [%1]" : : "r" (val), "r" (addr) : "memory");
dmb();
}