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#ifndef ARCH_MMIO_H
#define ARCH_MMIO_H 1
//extended read, GS is already set
static inline __attribute__((always_inline)) uint8_t read8x(uint32_t addr)
{
uint8_t value;
__asm__ volatile (
"movb %%gs:(%1), %0\n\t"
:"=a"(value): "b" (addr)
);
return value;
}
static inline __attribute__((always_inline)) uint16_t read16x(uint32_t addr)
{
uint16_t value;
__asm__ volatile (
"movw %%gs:(%1), %0\n\t"
:"=a"(value): "b" (addr)
);
return value;
}
static inline __attribute__((always_inline)) uint32_t read32x(uint32_t addr)
{
uint32_t value;
__asm__ volatile (
"movl %%gs:(%1), %0\n\t"
:"=a"(value): "b" (addr)
);
return value;
}
static inline __attribute__((always_inline)) void write8x(uint32_t addr, uint8_t value)
{
__asm__ volatile (
"movb %1, %%gs:(%0)\n\t"
:: "b" (addr), "a" (value)
);
}
static inline __attribute__((always_inline)) void write16x(uint32_t addr, uint16_t value)
{
__asm__ volatile (
"movw %1, %%gs:(%0)\n\t"
:: "b" (addr), "a" (value)
);
}
static inline __attribute__((always_inline)) void write32x(uint32_t addr, uint32_t value)
{
__asm__ volatile (
"movl %1, %%gs:(%0)\n\t"
:: "b" (addr), "a" (value)
);
}
#endif /* ARCH_MMIO_H */
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