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🆕 cpu模块获取处理器固件基础信息

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This commit is contained in:
fslongjin
2022-02-22 23:31:33 +08:00
parent 07babf6db4
commit ad51f8b6ea
5 changed files with 125 additions and 3 deletions
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64
kernel/common/cpu.c Normal file
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#include "cpu.h"
#include "kprint.h"
#include "printk.h"
void cpu_init(void)
{
// 获取处理器制造商信息
uint tmp_info[4] = {0};
cpu_cpuid(0, 0, &tmp_info[0], &tmp_info[1], &tmp_info[2], &tmp_info[3]);
// 保存CPU支持的最大cpuid指令主功能号
Cpu_cpuid_max_Basic_mop = tmp_info[0];
// 保存制造商名称
*(uint *)&Cpu_Manufacturer_Name[0] = tmp_info[1];
*(uint *)&Cpu_Manufacturer_Name[4] = tmp_info[3];
*(uint *)&Cpu_Manufacturer_Name[8] = tmp_info[2];
Cpu_Manufacturer_Name[12] = '\0';
kinfo("CPU manufacturer: %s", Cpu_Manufacturer_Name);
// 获取处理器型号信息
int count = 0;
for (uint i = 0x80000002; i < 0x80000005; ++i)
{
cpu_cpuid(i, 0, &tmp_info[0], &tmp_info[1], &tmp_info[2], &tmp_info[3]);
for (int j = 0; j <= 3; ++j)
{
*(uint *)&Cpu_BrandName[4 * count] = tmp_info[j];
++count;
}
}
Cpu_BrandName[48] = '\0';
kinfo("CPU Brand Name: %s", Cpu_BrandName);
// 使用cpuid主功能号0x01进行查询(未保存ebx ecx edx的信息，具体参见白皮书)
cpu_cpuid(1, 0, &tmp_info[0], &tmp_info[1], &tmp_info[2], &tmp_info[3]);
// EAX中包含 Version Informatin Type,Family,Model,and Stepping ID
Cpu_Stepping_ID = tmp_info[0] & 0xf;
Cpu_Model_ID = (tmp_info[0]>>4) & 0xf;
Cpu_Family_ID = (tmp_info[0]>>8) & 0xf;
Cpu_Processor_Type = (tmp_info[0]>>12)& 0x3;
// 14-15位保留
Cpu_Extended_Model_ID = (tmp_info[0]>>16)&0xf;
Cpu_Extended_Family_ID = (tmp_info[0]>>20)&0xff;
//31-25位保留
kinfo("Family ID=%#03lx\t Extended Family ID=%#03lx\t Processor Type=%#03lx\t",Cpu_Family_ID, Cpu_Extended_Family_ID, Cpu_Processor_Type);
kinfo("Model ID=%#03lx\t Extended Model ID=%#03lx\tStepping ID=%#03lx\t",Cpu_Model_ID, Cpu_Extended_Model_ID,Cpu_Stepping_ID);
// 使用0x80000008主功能号，查询处理器支持的最大可寻址地址线宽度
cpu_cpuid(0x80000008, 0, &tmp_info[0], &tmp_info[1], &tmp_info[2], &tmp_info[3]);
Cpu_max_phys_addrline_size = tmp_info[0]&0xff;
Cpu_max_linear_addrline_size = (tmp_info[0]>>8)&0xff;
kinfo("Cpu_max_phys_addrline_size = %d", Cpu_max_phys_addrline_size);
kinfo("Cpu_max_linear_addrline_size = %d", Cpu_max_linear_addrline_size);
cpu_cpuid(0x80000000, 0, &tmp_info[0], &tmp_info[1], &tmp_info[2], &tmp_info[3]);
Cpu_cpuid_max_Extended_mop = tmp_info[0];
kinfo("Max basic mop=%#05lx",Cpu_cpuid_max_Basic_mop);
kinfo("Max extended mop=%#05lx",Cpu_cpuid_max_Extended_mop);
return;
}