mirror of
https://github.com/DragonOS-Community/DragonOS.git
synced 2025-06-16 14:06:48 +00:00
64 lines
2.6 KiB
C
64 lines
2.6 KiB
C
#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;
|
||
} |