🆕 获取核心晶振频率的函数

This commit is contained in:
fslongjin 2022-07-11 18:39:59 +08:00
parent 717c7a6715
commit 7d64ad6c1a
2 changed files with 36 additions and 6 deletions

View File

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

View File

@ -56,4 +56,12 @@ struct cpu_core_info_t
uint64_t tss_vaddr; // tss地址
};
extern struct cpu_core_info_t cpu_core_info[MAX_CPU_NUM];
extern struct cpu_core_info_t cpu_core_info[MAX_CPU_NUM];
/**
* @brief cpu核心晶振频率
*
* @return uint32_t cpu核心晶振频率
*/
uint32_t cpu_get_core_crysral_freq();