old-trainOS/include/vmm.h

#pragma once

#include <inttypes.h>
#include <config.h>

#if defined(__cplusplus)
extern "C"  {
#endif

#if defined(USE_VIRTUAL_MEMORY_MANAGEMENT)

#define VM_PRESENT  0x01
#define VM_WRITABLE 0x02
#define VM_USER     0x04

#define VM_KERNEL   (VM_PRESENT | VM_WRITABLE
#define VM_PROGRAM  (VM_PRESENT | VM_WRITABLE | VM_USER)

void vmm_init(void);

/**
 * Maps a physical address to a virtual address.
 * @param virtual The virtual address to be mapped.
 * @param physical Target physical address
 * @param flags Flags for the mapping
 * @remarks If flags is 0, the mapping will be undone.
 */
void vmm_map(uintptr_t virtual, uintptr_t physical, uint32_t flags);

#endif

#if defined(__cplusplus)
}
#endif