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Implement feature detection in sysinfo

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This commit is contained in:
Baptiste Wicht 2013-12-01 22:14:34 +01:00
parent 0eb9c743b5
commit 214b21886b
1 changed files with 39 additions and 1 deletions
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40
kernel/src/shell.cpp
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@ -499,8 +499,29 @@ void native_cpuid(uint32_t* eax, uint32_t* ebx, uint32_t* ecx, uint32_t* edx){
: "0" (*eax), "2" (*ecx));
}
// EDX Features
const int FPU = 1 << 0;
const int MMX = 1 << 23;
const int SSE = 1 << 25;
const int SSE2 = 1 << 26;
const int HT = 1 << 28;
//EAX Features
const int SSE3 = 1 << 9;
const int SSE41 = 1 << 19;
const int SSE42 = 1 << 20;
const int AES = 1 << 25;
const int AVX = 1 << 28;
void test_feature(uint32_t reg, int mask, const char* s){
if(reg & mask){
k_print(' ');
k_print(s);
}
}
void sysinfo_command(const vector<string>&){
uint32_t eax, ebx, ecx, edx;
uint32_t eax = 0, ebx = 0, ecx = 0, edx = 0;
eax = 1;
native_cpuid(&eax, &ebx, &ecx, &edx);
@ -522,6 +543,23 @@ void sysinfo_command(const vector<string>&){
vendor_id[12] = '\0';
k_printf("Vendor ID: %s\n", vendor_id);
eax = 1;
native_cpuid(&eax, &ebx, &ecx, &edx);
k_print("Features:");
test_feature(edx, FPU, "fpu");
test_feature(edx, MMX, "mmx");
test_feature(edx, SSE, "sse");
test_feature(edx, SSE2, "sse2");
test_feature(edx, HT, "ht");
test_feature(ecx, SSE3, "sse3");
test_feature(ecx, SSE41, "sse4_1");
test_feature(ecx, SSE42, "sse4_2");
test_feature(ecx, AES, "aes");
test_feature(ecx, AVX, "avx");
}
} //end of anonymous namespace