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https://github.com/DragonOS-Community/DragonOS.git
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120 lines
4.4 KiB
C
120 lines
4.4 KiB
C
#include "cpu.h"
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#include "kprint.h"
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#include "printk.h"
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// cpu支持的最大cpuid指令的基础主功能号
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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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// 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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uint Cpu_Family_ID;
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// 处理器扩展家族ID
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uint Cpu_Extended_Family_ID;
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// 处理器模式ID
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uint Cpu_Model_ID;
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// 处理器扩展模式ID
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uint Cpu_Extended_Model_ID;
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// 处理器步进ID
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uint Cpu_Stepping_ID;
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// 处理器类型
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uint Cpu_Processor_Type;
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// 处理器支持的最大物理地址可寻址地址线宽度
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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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// 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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}
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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"
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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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} |