leon3.h

/*
    Reset 后硬件状态:
    - PC/NPC 一般指向 TrapTable
    - PSR: S=1, ET=0, CWP=0
    - WIM
    - TBR = 0 
    软件初始化:
    - TrapTable
    - TBR (如果允许修改), 但 reset 始终位于 0x0000
    - WIM 配置
    - 所有全局 / 本地 / SP / Y 寄存器均不确定. 
    - 实时使 PSR.ET = 1, 否则永不响应. 
*/

#pragma once 
#include "ucc.h"

#include <filesystem>
namespace fs = std::filesystem;

class Leon3 : public ucc {
public:
    enum class Reg : int {
        pc = UC_SPARC_REG_PC,
    };
    enum class CsReg : int {
    };

    // 实现 irqmp
    // irq_ack 
    // set_pil_in 
    // irq_manager 


    // hw_init, machine_init 
private:
    static constexpr uint64_t RAM_BASE = 0x40000000;
    static constexpr size_t RAM_SIZE = 0x100000;  // 1 MB


    static constexpr uint64_t ROM_BASE = 0x00000000; 
    static constexpr size_t ROM_SIZE = 0x2000;  // 8 KB

    // BM3803 片上外设区域 (AHB I/O)
    static constexpr uint64_t PERIPH_BASE = 0x80000000;
    static constexpr size_t PERIPH_SIZE = 0x2000;  // 8 KB

    static constexpr uint64_t MMIO_BASE = 0x20000000;
    static constexpr size_t MMIO_SIZE = 0x20000000;  // 512 MB 
    void map_memory() {
        mem_map(RAM_BASE, RAM_SIZE, UC_PROT_ALL);
        mem_map(ROM_BASE, ROM_SIZE, UC_PROT_READ | UC_PROT_EXEC);
        mem_map(PERIPH_BASE, PERIPH_SIZE, UC_PROT_ALL);
        mem_map(MMIO_BASE, MMIO_SIZE, UC_PROT_ALL);
    }
};

void leon3_elf_bootload(Leon3& uc, const fs::path& elf_path);