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🆕 获取核心晶振频率的函数
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@ -7,7 +7,7 @@ uint Cpu_cpuid_max_Basic_mop;
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// cpu支持的最大cpuid指令的扩展主功能号
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uint Cpu_cpuid_max_Extended_mop;
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// cpu制造商信息
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char Cpu_Manufacturer_Name[17]={0};
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char Cpu_Manufacturer_Name[17] = {0};
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// 处理器名称信息
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char Cpu_BrandName[49] = {0};
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// 处理器家族ID
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@ -27,7 +27,6 @@ uint Cpu_max_phys_addrline_size;
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// 处理器支持的最大线性地址可寻址地址线宽度
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uint Cpu_max_linear_addrline_size;
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struct cpu_core_info_t cpu_core_info[MAX_CPU_NUM];
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void cpu_init(void)
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{
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@ -90,9 +89,32 @@ void cpu_init(void)
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return;
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}
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void cpu_cpuid(uint32_t mop, uint32_t sop, uint32_t *eax, uint32_t*ebx, uint32_t*ecx, uint32_t*edx)
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{
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void cpu_cpuid(uint32_t mop, uint32_t sop, uint32_t *eax, uint32_t *ebx, uint32_t *ecx, uint32_t *edx)
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{
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// 向eax和ecx分别输入主功能号和子功能号
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// 结果输出到eax, ebx, ecx, edx
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__asm__ __volatile__("cpuid \n\t":"=a"(*eax),"=b"(*ebx), "=c"(*ecx), "=d"(*edx):"0"(mop),"2"(sop):"memory");
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__asm__ __volatile__("cpuid \n\t"
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: "=a"(*eax), "=b"(*ebx), "=c"(*ecx), "=d"(*edx)
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: "0"(mop), "2"(sop)
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: "memory");
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}
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/**
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* @brief 获取当前cpu核心晶振频率(是一个Write-on-box的值)
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*
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* hint: 某些cpu无法提供该数据,返回值为0
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* @return uint32_t 当前cpu核心晶振频率
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*/
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uint32_t cpu_get_core_crysral_freq()
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{
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uint32_t a = 0, b = 0, c = 0, d = 0;
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// cpu_cpuid(0x15, 0, &a, &b, &c, &d);
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__asm__ __volatile__("cpuid \n\t"
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: "=a"(a), "=b"(b), "=c"(c), "=d"(d)
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: "0"(0x15), "2"(0)
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: "memory");
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// kdebug("Cpu_cpuid_max_Basic_mop = %#03x, a=%ld, b=%ld, c=%ld, d=%ld", Cpu_cpuid_max_Basic_mop, a, b, c, d);
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return c;
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}
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@ -56,4 +56,12 @@ struct cpu_core_info_t
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uint64_t tss_vaddr; // tss地址
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};
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extern struct cpu_core_info_t cpu_core_info[MAX_CPU_NUM];
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extern struct cpu_core_info_t cpu_core_info[MAX_CPU_NUM];
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/**
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* @brief 获取当前cpu核心晶振频率
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*
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* @return uint32_t 当前cpu核心晶振频率
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*/
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uint32_t cpu_get_core_crysral_freq();
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