phys_window.h

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#ifndef __MEMORY__PHYS_WINDOW_H__
#define __MEMORY__PHYS_WINDOW_H__
 
#include <spinlock.h>
#include <type.h>
 
typedef int mem_physwindow_status_t;
enum {
    PHYS_WINDOW_STATUS_OK = 0,
    PHYS_WINDOW_STATUS_ERROR = -1,
    PHYS_WINDOW_STATUS_NOT_FOUND = -2,
};
 
typedef int mem_physwindow_flag_t;
enum {
    PHYS_WINDOW_FLAG_READ = 0x1,
    PHYS_WINDOW_FLAG_WRITE = 0x2,
    PHYS_WINDOW_FLAG_LOCK = 0x20,
};
 
typedef struct {
    uintptr_t virt_addr;
    uintptr_t phys_addr;
    _Atomic int lock;
    mem_physwindow_flag_t flag;
} __attribute__((aligned(64))) mem_physwindow_t;
 
mem_physwindow_status_t mem_create_physwindow(uintptr_t phys_addr,
                                              uintptr_t* virt_addr,
                                              mem_physwindow_flag_t flag);
mem_physwindow_status_t mem_release_physwindow(uintptr_t virt_addr);
mem_physwindow_t* mem_resolve_physwindow(uintptr_t virt_addr);
 
#endif // __MEMORY__PHYS_WINDOW_H__