/**************************************************************************** * 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 directed 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 #include /**************************************************************************** * 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 */