* AcessOS Basic C Library\r
*/\r
#include "stdio_int.h"\r
+#include "lib.h"\r
\r
+#define USE_CPUID 0\r
+\r
+// === PROTOTYPES ===\r
+#if USE_CPUID\r
+static void cpuid(uint32_t Num, uint32_t *EAX, uint32_t *EBX, uint32_t *EDX, uint32_t *ECX);\r
+#endif\r
+\r
+// === GLOBALS ===\r
extern char **_envp;\r
extern struct sFILE _iob[];\r
+extern struct sFILE *stdin;\r
+extern struct sFILE *stdout;\r
+extern struct sFILE *stderr;\r
+// --- CPU Features ---\r
+#if USE_CPUID\r
+tCPUID gCPU_Features;\r
+#endif\r
\r
+// === CODE ===\r
/**\r
* \fn int SoMain()\r
* \brief Stub Entrypoint\r
_envp = envp;\r
\r
// Init FileIO Pointers\r
- _iob[0].FD = 0; _iob[0].Flags = FILE_FLAG_MODE_READ;\r
- _iob[1].FD = 1; _iob[1].Flags = FILE_FLAG_MODE_WRITE;\r
- _iob[2].FD = 2; _iob[2].Flags = FILE_FLAG_MODE_WRITE;\r
+ stdin = &_iob[0];\r
+ stdin->FD = 0; stdin->Flags = FILE_FLAG_MODE_READ;\r
+ stdout = &_iob[1];\r
+ stdout->FD = 1; stdout->Flags = FILE_FLAG_MODE_WRITE;\r
+ stderr = &_iob[2];\r
+ stderr->FD = 2; stderr->Flags = FILE_FLAG_MODE_WRITE;\r
+ \r
+ #if USE_CPUID\r
+ {\r
+ uint32_t ecx, edx;\r
+ cpuid(1, NULL, NULL, &edx, &ecx);\r
+ gCPU_Features.SSE = edx & (1 << 25); // SSE\r
+ gCPU_Features.SSE2 = edx & (1 << 26); // SSE2\r
+ }\r
+ #endif\r
\r
return 1;\r
}\r
+\r
+\r
+#if USE_CPUID\r
+/**\r
+ * \brief Call the CPUID opcode\r
+ */\r
+static void cpuid(uint32_t Num, uint32_t *EAX, uint32_t *EBX, uint32_t *EDX, uint32_t *ECX)\r
+{\r
+ uint32_t eax, ebx, edx, ecx;\r
+ \r
+ __asm__ __volatile__ (\r
+ "cpuid"\r
+ : "=a"(eax), "=c"(ecx), "=d"(edx)\r
+ : "a"(Num)\r
+ );\r
+ \r
+ if(EAX) *EAX = eax;\r
+ if(EBX) *EBX = ebx;\r
+ if(EDX) *EDX = edx;\r
+ if(ECX) *ECX = ecx;\r
+}\r
+#endif\r