// This file is part of noxos and licensed under the MIT open source license

#ifndef NOX_CPU_H
#define NOX_CPU_H

#include "utils/stdtypes.h"

typedef enum {
    CPU_FLAG_CARRY                      = 0,
    CPU_FLAG_PARITY                     = 2,
    CPU_FLAG_AUXILIARY                  = 4,
    CPU_FLAG_ZERO                       = 6,
    CPU_FLAG_SIGN                       = 7,
    CPU_FLAG_TRAP                       = 8,
    CPU_FLAG_INTERRUPT_ENABLE           = 9,
    CPU_FLAG_DIRECTION                  = 10,
    CPU_FLAG_OVERFLOW                   = 11,
    CPU_FLAG_IO_PRIVILEGE_0             = 12,
    CPU_FLAG_IO_PRIVILEGE_1             = 13,
    CPU_FLAG_NESTED_TASK                = 14,
    CPU_FLAG_RESUME                     = 16,
    CPU_FLAG_VIRTUAL_8086               = 17,
    CPU_FLAG_ALIGNMENT_CHECK            = 18,
    CPU_FLAG_VIRTUAL_INTERRUPT          = 19,
    CPU_FLAG_VIRTUAL_INTERRUPT_PENDING  = 20,
    CPU_FLAG_CPUID                      = 21
} cpu_flags_E;

typedef struct {
    // Registers saved by assembly function
    uint64_t    cr3;
    uint64_t    rax;
    uint64_t    rbx;
    uint64_t    rcx;
    uint64_t    rdx;
    uint64_t    rsi;
    uint64_t    rdi;
    uint64_t    rbp;

    // Manually pushed
    uint64_t    interrupt_id;
    uint64_t    error_code;

    // Saved by CPU
    uint64_t    rip;
    uint64_t    cs;
    uint64_t    flags;
    uint64_t    rsp;
    uint64_t    ss;
} cpu_state_T;

#endif //NOX_CPU_H