183 lines
4.4 KiB
C
183 lines
4.4 KiB
C
/*
|
|
* Copyright (C) 2018 Intel Corporation. All rights reserved.
|
|
*
|
|
* SPDX-License-Identifier: BSD-3-Clause
|
|
*/
|
|
|
|
#ifndef IO_H
|
|
#define IO_H
|
|
|
|
#include <types.h>
|
|
|
|
/* Write 1 byte to specified I/O port */
|
|
static inline void pio_write8(uint8_t value, uint16_t port)
|
|
{
|
|
asm volatile ("outb %0,%1"::"a" (value), "dN"(port));
|
|
}
|
|
|
|
/* Read 1 byte from specified I/O port */
|
|
static inline uint8_t pio_read8(uint16_t port)
|
|
{
|
|
uint8_t value;
|
|
|
|
asm volatile ("inb %1,%0":"=a" (value):"dN"(port));
|
|
return value;
|
|
}
|
|
|
|
/* Write 2 bytes to specified I/O port */
|
|
static inline void pio_write16(uint16_t value, uint16_t port)
|
|
{
|
|
asm volatile ("outw %0,%1"::"a" (value), "dN"(port));
|
|
}
|
|
|
|
/* Read 2 bytes from specified I/O port */
|
|
static inline uint16_t pio_read16(uint16_t port)
|
|
{
|
|
uint16_t value;
|
|
|
|
asm volatile ("inw %1,%0":"=a" (value):"dN"(port));
|
|
return value;
|
|
}
|
|
|
|
/* Write 4 bytes to specified I/O port */
|
|
static inline void pio_write32(uint32_t value, uint16_t port)
|
|
{
|
|
asm volatile ("outl %0,%1"::"a" (value), "dN"(port));
|
|
}
|
|
|
|
/* Read 4 bytes from specified I/O port */
|
|
static inline uint32_t pio_read32(uint16_t port)
|
|
{
|
|
uint32_t value;
|
|
|
|
asm volatile ("inl %1,%0":"=a" (value):"dN"(port));
|
|
return value;
|
|
}
|
|
|
|
static inline void pio_write(uint32_t v, uint16_t addr, size_t sz)
|
|
{
|
|
if (sz == 1U) {
|
|
pio_write8((uint8_t)v, addr);
|
|
} else if (sz == 2U) {
|
|
pio_write16((uint16_t)v, addr);
|
|
} else {
|
|
pio_write32(v, addr);
|
|
}
|
|
}
|
|
|
|
static inline uint32_t pio_read(uint16_t addr, size_t sz)
|
|
{
|
|
if (sz == 1U) {
|
|
return pio_read8(addr);
|
|
}
|
|
if (sz == 2U) {
|
|
return pio_read16(addr);
|
|
}
|
|
return pio_read32(addr);
|
|
}
|
|
|
|
/** Writes a 32 bit value to a memory mapped IO device.
|
|
*
|
|
* @param value The 32 bit value to write.
|
|
* @param addr The memory address to write to.
|
|
*/
|
|
static inline void mmio_write32(uint32_t value, void *addr)
|
|
{
|
|
volatile uint32_t *addr32 = (volatile uint32_t *)addr;
|
|
*addr32 = value;
|
|
}
|
|
|
|
/** Writes a 16 bit value to a memory mapped IO device.
|
|
*
|
|
* @param value The 16 bit value to write.
|
|
* @param addr The memory address to write to.
|
|
*/
|
|
static inline void mmio_write16(uint16_t value, void *addr)
|
|
{
|
|
volatile uint16_t *addr16 = (volatile uint16_t *)addr;
|
|
*addr16 = value;
|
|
}
|
|
|
|
/** Writes an 8 bit value to a memory mapped IO device.
|
|
*
|
|
* @param value The 8 bit value to write.
|
|
* @param addr The memory address to write to.
|
|
*/
|
|
static inline void mmio_write8(uint8_t value, void *addr)
|
|
{
|
|
volatile uint8_t *addr8 = (volatile uint8_t *)addr;
|
|
*addr8 = value;
|
|
}
|
|
|
|
/** Reads a 32 bit value from a memory mapped IO device.
|
|
*
|
|
* @param addr The memory address to read from.
|
|
*
|
|
* @return The 32 bit value read from the given address.
|
|
*/
|
|
static inline uint32_t mmio_read32(void *addr)
|
|
{
|
|
return *((volatile uint32_t *)addr);
|
|
}
|
|
|
|
/** Reads a 16 bit value from a memory mapped IO device.
|
|
*
|
|
* @param addr The memory address to read from.
|
|
*
|
|
* @return The 16 bit value read from the given address.
|
|
*/
|
|
static inline uint16_t mmio_read16(void *addr)
|
|
{
|
|
return *((volatile uint16_t *)addr);
|
|
}
|
|
|
|
/** Reads an 8 bit value from a memory mapped IO device.
|
|
*
|
|
* @param addr The memory address to read from.
|
|
*
|
|
* @return The 8 bit value read from the given address.
|
|
*/
|
|
static inline uint8_t mmio_read8(void *addr)
|
|
{
|
|
return *((volatile uint8_t *)addr);
|
|
}
|
|
|
|
|
|
/** Reads a 32 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 32 bit value to write.
|
|
*/
|
|
static inline void set32(void *addr, uint32_t mask, uint32_t value)
|
|
{
|
|
mmio_write32((mmio_read32(addr) & ~mask) | value, addr);
|
|
}
|
|
|
|
/** Reads a 16 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 16 bit value to write.
|
|
*/
|
|
static inline void set16(void *addr, uint16_t mask, uint16_t value)
|
|
{
|
|
mmio_write16((mmio_read16(addr) & ~mask) | value, addr);
|
|
}
|
|
|
|
/** Reads a 8 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 8 bit value to write.
|
|
*/
|
|
static inline void set8(void *addr, uint8_t mask, uint8_t value)
|
|
{
|
|
mmio_write8((mmio_read8(addr) & ~mask) | value, addr);
|
|
}
|
|
|
|
#endif /* _IO_H defined */
|