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hv: add mmio functions for 64bit values

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Signed-off-by: Zhi Jin <zhi.jin@intel.com>
Reviewed-by: CHEN Gang <gang.c.chen@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
This commit is contained in:
Zhi Jin 2018-08-07 11:02:46 +08:00 committed by wenlingz
parent dcae438306
commit 3c6df9b70c
1 changed files with 36 additions and 0 deletions
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36
hypervisor/include/arch/x86/io.h
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@ -76,6 +76,17 @@ static inline uint32_t pio_read(uint16_t addr, size_t sz)
return pio_read32(addr);
}
/** Writes a 64 bit value to a memory mapped IO device.
*
* @param value The 64 bit value to write.
* @param addr The memory address to write to.
*/
static inline void mmio_write64(uint64_t value, const void *addr)
{
volatile uint64_t *addr64 = (volatile uint64_t *)addr;
*addr64 = value;
}
/** Writes a 32 bit value to a memory mapped IO device.
*
* @param value The 32 bit value to write.
@ -109,6 +120,17 @@ static inline void mmio_write8(uint8_t value, const void *addr)
*addr8 = value;
}
/** Reads a 64 bit value from a memory mapped IO device.
*
* @param addr The memory address to read from.
*
* @return The 64 bit value read from the given address.
*/
static inline uint64_t mmio_read64(const void *addr)
{
return *((volatile uint64_t *)addr);
}
/** Reads a 32 bit value from a memory mapped IO device.
*
* @param addr The memory address to read from.
@ -142,6 +164,20 @@ static inline uint8_t mmio_read8(const void *addr)
return *((volatile uint8_t *)addr);
}
/** Reads a 64 Bit memory mapped IO register, mask it and write it back into
* memory mapped IO register.
*
* @param addr The address of the memory mapped IO register.
* @param mask The mask to apply to the value read.
* @param value The 64 bit value to write.
*/
static inline void set64(const void *addr, uint64_t mask, uint64_t value)
{
uint64_t temp_val;
temp_val = mmio_read64(addr);
mmio_write64((temp_val & ~mask) | value, addr);
}
/** Reads a 32 Bit memory mapped IO register, mask it and write it back into
* memory mapped IO register.