/*
    * S3State.hpp
    * CPU state saved across S3 by S3Wake.asm
    * Copyright (c) 2026 Daniel Hammer
*/

#pragma once
#include <cstdint>

namespace Hal {
    namespace AcpiSleep {

        // ============================================================================
        // Layout must match S3Wake.asm offsets exactly.
        // No FPU/SSE state — the kernel is compiled with -mno-sse.
        struct CpuState {
            uint64_t Rax, Rbx, Rcx, Rdx;   // 0x00 - 0x18
            uint64_t Rsi, Rdi, Rbp, Rsp;   // 0x20 - 0x38
            uint64_t R8, R9, R10, R11;     // 0x40 - 0x58
            uint64_t R12, R13, R14, R15;   // 0x60 - 0x78
            uint64_t Rflags;               // 0x80
            uint64_t Rip;                  // 0x88
            uint64_t Cr3;                  // 0x90
            uint64_t Cr0, Cr4;             // 0x98, 0xA0
            uint8_t  GdtPtr[10];           // 0xA8
            uint8_t  IdtPtr[10];           // 0xB2
        } __attribute__((aligned(16)));

    };
};