sp1/amd64: cpu: Obtain processor vendor information

Signed-off-by: Ian Moffett <ian@mirocom.org>

usr/src/sp1/amd64/cpu/cpu_init.c

@@ -36,12 +36,48 @@ cpu_print_info(struct cpu_info *ci)
     }
 
     mcb = &ci->mcb;
-    pr_trace("pg.nx       : yes\n");
-    pr_trace("cpu.model   : %x\n", mcb->model_id);
-    pr_trace("cpu.family  : %x\n", mcb->family_id);
+    pr_trace("pg.nx            : yes\n");
+    pr_trace("cpu.model        : %x\n", mcb->model_id);
+    pr_trace("cpu.family       : %x\n", mcb->family_id);
     once = true;
 }
 
+/*
+ * Obtain the processor vendor
+ */
+static void
+cpu_get_vendor(void)
+{
+    uint32_t ebx, edx, ecx, unused;
+    char vendor[13];
+
+    /* Obtain the manufacturer ID */
+    __cpuid(0x0, unused, ebx, ecx, edx);
+
+    /* Dword 0 */
+    vendor[0] = ebx & 0xFF;
+    vendor[1] = (ebx >> 8) & 0xFF;
+    vendor[2] = (ebx >> 16) & 0xFF;
+    vendor[3] = (ebx >> 24) & 0xFF;
+
+    /* Dword 1 */
+    vendor[4] = edx & 0xFF;
+    vendor[5] = (edx >> 8) & 0xFF;
+    vendor[6] = (edx >> 16) & 0xFF;
+    vendor[7] = (edx >> 24) & 0xFF;
+
+    /* Dword 1 */
+    vendor[8] = ecx & 0xFF;
+    vendor[9] = (ecx >> 8) & 0xFF;
+    vendor[10] = (ecx >> 16) & 0xFF;
+    vendor[11] = (ecx >> 24) & 0xFF;
+    vendor[12] = '\0';
+    pr_trace("cpu.manufacturer : %s\n", vendor);
+}
+
+/*
+ * Obtain processor specific information
+ */
 static void
 cpu_get_info(struct cpu_info *ci)
 {
@@ -55,6 +91,7 @@ cpu_get_info(struct cpu_info *ci)
     }
 
     mcb = &ci->mcb;
+    cpu_get_vendor();
 
     /* Get processor info and feature bits */
     __cpuid(0x01, eax, unused, unused, unused);