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- /****************************************************************************
- * arch/x86_64/include/intel64/io.h
- *
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements. See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership. The
- * ASF licenses this file to you under the Apache License, Version 2.0 (the
- * "License"); you may not use this file except in compliance with the
- * License. You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
- * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
- * License for the specific language governing permissions and limitations
- * under the License.
- *
- ****************************************************************************/
- /* This file should never be included directly but, rather, only indirectly
- * through arch/io.h
- */
- #ifndef __ARCH_X86_64_INCLUDE_INTEL64_IO_H
- #define __ARCH_X86_64_INCLUDE_INTEL64_IO_H
- /****************************************************************************
- * Included Files
- ****************************************************************************/
- #include <stdint.h>
- #include <arch/arch.h>
- /****************************************************************************
- * Pre-processor Definitions
- ****************************************************************************/
- /****************************************************************************
- * Public Types
- ****************************************************************************/
- #ifndef __ASSEMBLY__
- /****************************************************************************
- * Inline functions
- ****************************************************************************/
- /* Standard x86 Port I/O */
- static inline void outb(uint8_t regval, uint16_t port)
- {
- asm volatile(
- "\toutb %0,%1\n"
- :
- : "a" (regval), "dN" (port)
- );
- }
- static inline uint8_t inb(uint16_t port)
- {
- uint8_t regval;
- asm volatile(
- "\tinb %1,%0\n"
- : "=a" (regval)
- : "dN" (port)
- );
- return regval;
- }
- static inline void outw(uint16_t regval, uint16_t port)
- {
- asm volatile(
- "\toutw %0,%1\n"
- :
- : "a" (regval), "dN" (port)
- );
- }
- static inline uint16_t inw(uint16_t port)
- {
- uint16_t regval;
- asm volatile(
- "\tinw %1,%0\n"
- : "=a" (regval)
- : "dN" (port)
- );
- return regval;
- }
- static inline void outl(uint32_t regval, uint16_t port)
- {
- asm volatile(
- "\toutl %0,%1\n"
- :
- : "a" (regval), "dN" (port)
- );
- }
- static inline uint32_t inl(uint16_t port)
- {
- uint32_t regval;
- asm volatile(
- "\tinl %1,%0\n"
- : "=a" (regval)
- : "dN" (port)
- );
- return regval;
- }
- /* MMIO */
- static inline uint8_t mmio_read8(void *address)
- {
- return *(volatile uint8_t *)address;
- }
- static inline uint16_t mmio_read16(void *address)
- {
- return *(volatile uint16_t *)address;
- }
- static inline uint32_t mmio_read32(void *address)
- {
- uint32_t value;
- /* Assembly-encoded to match the hypervisor MMIO parser support */
- asm volatile("movl (%1),%0" : "=r" (value) : "r" (address));
- return value;
- }
- static inline uint64_t mmio_read64(void *address)
- {
- return *(volatile uint64_t *)address;
- }
- static inline void mmio_write8(void *address, uint8_t value)
- {
- *(volatile uint8_t *)address = value;
- }
- static inline void mmio_write16(void *address, uint16_t value)
- {
- *(volatile uint16_t *)address = value;
- }
- static inline void mmio_write32(void *address, uint32_t value)
- {
- /* Assembly-encoded to match the hypervisor MMIO parser support */
- asm volatile("movl %0,(%1)" : : "r" (value), "r" (address));
- }
- static inline void mmio_write64(void *address, uint64_t value)
- {
- *(volatile uint64_t *)address = value;
- }
- static inline void up_trash_cpu(void)
- {
- for (; ; )
- {
- asm volatile ("cli;hlt;");
- }
- asm("ud2":::"memory");
- }
- static inline void up_invalid_TLB(uintptr_t start, uintptr_t end)
- {
- uintptr_t i;
- start = start & PAGE_MASK;
- end = (end + PAGE_SIZE - 1) & PAGE_MASK;
- for (i = start; i < end; i += PAGE_SIZE)
- {
- asm("invlpg %0;":: "m"(i):"memory");
- }
- }
- /****************************************************************************
- * Public Data
- ****************************************************************************/
- /****************************************************************************
- * Public Function Prototypes
- ****************************************************************************/
- #ifdef __cplusplus
- #define EXTERN extern "C"
- extern "C"
- {
- #else
- #define EXTERN extern
- #endif
- #undef EXTERN
- #ifdef __cplusplus
- }
- #endif
- #endif /* __ASSEMBLY__ */
- #endif /* __ARCH_X86_64_INCLUDE_INTEL64_IO_H */
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