Espresso 0.0.2a

kernel/boot.c

@@ -1,16 +1,66 @@
 #include <stdint.h>
-
 #include <string.h>
+#include <cpuid.h>
+#include <stdlib.h>
 
 #include <kernel/boot.h>
 
 
-uint8_t parse_boot_data(const char* data)
+extern uint8_t __bss_start;
+extern uint8_t __bss_end;
+
+
+void clear_bss(void)
 {
-  if (strlen(data) == 0)
-  {
-    return 0;
-  }
+  /*memset(&__bss_start, 0, &__bss_end - &__bss_start);*/
   
-  return 0;
+  for (int i = 0; i < ((&__bss_end) - (&__bss_start)); i++)
+  {
+    (&(__bss_start))[i] = 0x0;
+  }
+}
+
+char* get_cpu_vendor_string(void)
+{
+  unsigned int eax, ebx, ecx, edx;
+  char vendor[13];
+
+  if (!__get_cpuid(0, &eax, &ebx, &ecx, &edx))
+  {
+    return strdup("Unknown");
+  }
+
+  memcpy(&vendor[0], &ebx, 4);
+  memcpy(&vendor[4], &edx, 4);
+  memcpy(&vendor[8], &ecx, 4);
+  vendor[12] = '\0';
+
+  return strdup(vendor);
+}
+
+char* get_cpu_brand_string(void)
+{
+  unsigned int eax = 0, ebx = 0, ecx = 0, edx = 0;
+  
+  int k = __get_cpuid_max(0x80000000, NULL);
+
+  if (k >= (int) 0x80000005)
+  {
+    return strdup("Unknown");
+  }
+
+  char brand[49]; 
+  unsigned int* brand_ptr = (unsigned int*) brand;
+
+  for (unsigned int i = 0; i < 3; ++i)
+  {
+    __get_cpuid(0x80000002 + i, &eax, &ebx, &ecx, &edx);
+    brand_ptr[i * 4 + 0] = eax;
+    brand_ptr[i * 4 + 1] = ebx;
+    brand_ptr[i * 4 + 2] = ecx;
+    brand_ptr[i * 4 + 3] = edx;
+  }
+
+  brand[48] = '\0';
+  return strdup(brand);
 }