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64 lines
2.6 KiB
C
64 lines
2.6 KiB
C
#include "cpu.h"
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#include "kprint.h"
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#include "printk.h"
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void cpu_init(void)
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{
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// 获取处理器制造商信息
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uint tmp_info[4] = {0};
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cpu_cpuid(0, 0, &tmp_info[0], &tmp_info[1], &tmp_info[2], &tmp_info[3]);
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// 保存CPU支持的最大cpuid指令主功能号
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Cpu_cpuid_max_Basic_mop = tmp_info[0];
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// 保存制造商名称
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*(uint *)&Cpu_Manufacturer_Name[0] = tmp_info[1];
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*(uint *)&Cpu_Manufacturer_Name[4] = tmp_info[3];
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*(uint *)&Cpu_Manufacturer_Name[8] = tmp_info[2];
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Cpu_Manufacturer_Name[12] = '\0';
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kinfo("CPU manufacturer: %s", Cpu_Manufacturer_Name);
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// 获取处理器型号信息
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int count = 0;
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for (uint i = 0x80000002; i < 0x80000005; ++i)
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{
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cpu_cpuid(i, 0, &tmp_info[0], &tmp_info[1], &tmp_info[2], &tmp_info[3]);
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for (int j = 0; j <= 3; ++j)
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{
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*(uint *)&Cpu_BrandName[4 * count] = tmp_info[j];
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++count;
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}
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}
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Cpu_BrandName[48] = '\0';
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kinfo("CPU Brand Name: %s", Cpu_BrandName);
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// 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)
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cpu_cpuid(1, 0, &tmp_info[0], &tmp_info[1], &tmp_info[2], &tmp_info[3]);
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// EAX中包含 Version Informatin Type,Family,Model,and Stepping ID
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Cpu_Stepping_ID = tmp_info[0] & 0xf;
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Cpu_Model_ID = (tmp_info[0] >> 4) & 0xf;
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Cpu_Family_ID = (tmp_info[0] >> 8) & 0xf;
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Cpu_Processor_Type = (tmp_info[0] >> 12) & 0x3;
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// 14-15位保留
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Cpu_Extended_Model_ID = (tmp_info[0] >> 16) & 0xf;
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Cpu_Extended_Family_ID = (tmp_info[0] >> 20) & 0xff;
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// 31-25位保留
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kinfo("Family ID=%#03lx\t Extended Family ID=%#03lx\t Processor Type=%#03lx\t", Cpu_Family_ID, Cpu_Extended_Family_ID, Cpu_Processor_Type);
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kinfo("Model ID=%#03lx\t Extended Model ID=%#03lx\tStepping ID=%#03lx\t", Cpu_Model_ID, Cpu_Extended_Model_ID, Cpu_Stepping_ID);
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// 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
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cpu_cpuid(0x80000008, 0, &tmp_info[0], &tmp_info[1], &tmp_info[2], &tmp_info[3]);
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Cpu_max_phys_addrline_size = tmp_info[0] & 0xff;
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Cpu_max_linear_addrline_size = (tmp_info[0] >> 8) & 0xff;
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kinfo("Cpu_max_phys_addrline_size = %d", Cpu_max_phys_addrline_size);
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kinfo("Cpu_max_linear_addrline_size = %d", Cpu_max_linear_addrline_size);
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cpu_cpuid(0x80000000, 0, &tmp_info[0], &tmp_info[1], &tmp_info[2], &tmp_info[3]);
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Cpu_cpuid_max_Extended_mop = tmp_info[0];
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kinfo("Max basic mop=%#05lx", Cpu_cpuid_max_Basic_mop);
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kinfo("Max extended mop=%#05lx", Cpu_cpuid_max_Extended_mop);
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return;
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} |