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https://github.com/projectacrn/acrn-hypervisor.git
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8b16be9185
Many of the license and Intel copyright headers include the "All rights reserved" string. It is not relevant in the context of the BSD-3-Clause license that the code is released under. This patch removes those strings throughout the code (hypervisor, devicemodel and misc). Tracked-On: #7254 Signed-off-by: Geoffroy Van Cutsem <geoffroy.vancutsem@intel.com>
170 lines
3.8 KiB
C
170 lines
3.8 KiB
C
/*
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* Copyright (C) 2018 Intel Corporation.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#ifndef IO_H
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#define IO_H
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#include <types.h>
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/* Write 1 byte to specified I/O port */
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static inline void pio_write8(uint8_t value, uint16_t port)
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{
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asm volatile ("outb %0,%1"::"a" (value), "dN"(port));
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}
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/* Read 1 byte from specified I/O port */
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static inline uint8_t pio_read8(uint16_t port)
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{
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uint8_t value;
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asm volatile ("inb %1,%0":"=a" (value):"dN"(port));
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return value;
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}
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/* Write 2 bytes to specified I/O port */
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static inline void pio_write16(uint16_t value, uint16_t port)
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{
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asm volatile ("outw %0,%1"::"a" (value), "dN"(port));
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}
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/* Read 2 bytes from specified I/O port */
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static inline uint16_t pio_read16(uint16_t port)
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{
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uint16_t value;
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asm volatile ("inw %1,%0":"=a" (value):"dN"(port));
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return value;
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}
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/* Write 4 bytes to specified I/O port */
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static inline void pio_write32(uint32_t value, uint16_t port)
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{
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asm volatile ("outl %0,%1"::"a" (value), "dN"(port));
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}
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/* Read 4 bytes from specified I/O port */
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static inline uint32_t pio_read32(uint16_t port)
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{
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uint32_t value;
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asm volatile ("inl %1,%0":"=a" (value):"dN"(port));
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return value;
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}
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static inline void pio_write(uint32_t v, uint16_t addr, size_t sz)
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{
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if (sz == 1U) {
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pio_write8((uint8_t)v, addr);
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} else if (sz == 2U) {
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pio_write16((uint16_t)v, addr);
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} else {
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pio_write32(v, addr);
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}
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}
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static inline uint32_t pio_read(uint16_t addr, size_t sz)
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{
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uint32_t ret;
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if (sz == 1U) {
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ret = pio_read8(addr);
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} else if (sz == 2U) {
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ret = pio_read16(addr);
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} else {
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ret = pio_read32(addr);
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}
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return ret;
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}
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/** Writes a 64 bit value to a memory mapped IO device.
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*
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* @param value The 64 bit value to write.
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* @param addr The memory address to write to.
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*/
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static inline void mmio_write64(uint64_t value, void *addr)
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{
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volatile uint64_t *addr64 = (volatile uint64_t *)addr;
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*addr64 = value;
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}
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/** Writes a 32 bit value to a memory mapped IO device.
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*
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* @param value The 32 bit value to write.
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* @param addr The memory address to write to.
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*/
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static inline void mmio_write32(uint32_t value, void *addr)
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{
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volatile uint32_t *addr32 = (volatile uint32_t *)addr;
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*addr32 = value;
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}
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/** Writes a 16 bit value to a memory mapped IO device.
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*
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* @param value The 16 bit value to write.
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* @param addr The memory address to write to.
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*/
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static inline void mmio_write16(uint16_t value, void *addr)
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{
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volatile uint16_t *addr16 = (volatile uint16_t *)addr;
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*addr16 = value;
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}
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/** Writes an 8 bit value to a memory mapped IO device.
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*
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* @param value The 8 bit value to write.
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* @param addr The memory address to write to.
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*/
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static inline void mmio_write8(uint8_t value, void *addr)
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{
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volatile uint8_t *addr8 = (volatile uint8_t *)addr;
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*addr8 = value;
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}
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/** Reads a 64 bit value from a memory mapped IO device.
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*
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* @param addr The memory address to read from.
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*
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* @return The 64 bit value read from the given address.
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*/
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static inline uint64_t mmio_read64(const void *addr)
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{
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return *((volatile const uint64_t *)addr);
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}
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/** Reads a 32 bit value from a memory mapped IO device.
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*
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* @param addr The memory address to read from.
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*
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* @return The 32 bit value read from the given address.
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*/
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static inline uint32_t mmio_read32(const void *addr)
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{
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return *((volatile const uint32_t *)addr);
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}
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/** Reads a 16 bit value from a memory mapped IO device.
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*
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* @param addr The memory address to read from.
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*
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* @return The 16 bit value read from the given address.
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*/
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static inline uint16_t mmio_read16(const void *addr)
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{
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return *((volatile const uint16_t *)addr);
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}
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/** Reads an 8 bit value from a memory mapped IO device.
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*
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* @param addr The memory address to read from.
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*
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* @return The 8 bit value read from the given address.
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*/
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static inline uint8_t mmio_read8(const void *addr)
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{
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return *((volatile const uint8_t *)addr);
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}
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#endif /* _IO_H defined */
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