nexus-am/am/include/mips.h

32 lines
1.0 KiB
C

#ifndef __MIPS_H__
#define __MIPS_H__
#ifndef __ASSEMBLER__
#include <stdint.h>
static inline uint8_t inb(uintptr_t addr) { return *(volatile uint8_t *)addr; }
static inline uint16_t inw(uintptr_t addr) { return *(volatile uint16_t *)addr; }
static inline uint32_t inl(uintptr_t addr) { return *(volatile uint32_t *)addr; }
static inline void outb(uintptr_t addr, uint8_t data) { *(volatile uint8_t *)addr = data; }
static inline void outw(uintptr_t addr, uint16_t data) { *(volatile uint16_t *)addr = data; }
static inline void outl(uintptr_t addr, uint32_t data) { *(volatile uint32_t *)addr = data; }
#define PTE_V 0x2
#define PTE_D 0x4
// Page directory and page table constants
#define PTXSHFT 12 // Offset of PTX in a linear address
#define PDXSHFT 22 // Offset of PDX in a linear address
#define PDX(va) (((uint32_t)(va) >> PDXSHFT) & 0x3ff)
#define PTX(va) (((uint32_t)(va) >> PTXSHFT) & 0x3ff)
// Address in page table or page directory entry
#define PTE_ADDR(pte) ((uint32_t)(pte) & ~0xfff)
#endif
#endif