X-Git-Url: http://v3vee.org/palacios/gitweb/gitweb.cgi?p=palacios.git;a=blobdiff_plain;f=palacios%2Finclude%2Fpalacios%2Fvmm_lowlevel.h;h=af1f8209caf98526fcafb0e8d4f3ce7138164333;hp=f3c8db524babbc498b3e4dde09d43d32f4da5fc6;hb=571979dad8fc2138a7e11c4fe61e812a0a0b17d1;hpb=ed2b3c62f54f46c31ed18a100bb442e1656a3ddd

diff --git a/palacios/include/palacios/vmm_lowlevel.h b/palacios/include/palacios/vmm_lowlevel.h
index f3c8db5..af1f820 100644
--- a/palacios/include/palacios/vmm_lowlevel.h
+++ b/palacios/include/palacios/vmm_lowlevel.h
@@ -23,16 +23,70 @@
 #define CPUID_FEATURE_IDS 0x00000001
 #define CPUID_EXT_FEATURE_IDS 0x80000001
 
+struct seg_selector {
+    union {
+	uint16_t value;
+	struct {
+	    uint8_t rpl     : 2;
+	    uint8_t ti      : 1;
+	    uint16_t si     : 13;
+	} __attribute__((packed));
+    } __attribute__((packed));
+} __attribute__((packed));
+
+struct gen_segment {
+    uint16_t limit_lo;
+    uint32_t base_lo     : 24;
+    uint8_t type         : 4;
+    uint8_t system       : 1;
+    uint8_t dpl          : 2;
+    uint8_t present      : 1;
+    uint8_t limit_hi     : 4;
+    uint8_t avail        : 1;
+    uint8_t long_mode    : 1;
+    uint8_t db           : 1;
+    uint8_t granularity  : 1;
+    uint8_t base_hi      : 8;
+} __attribute__((packed));
+
+struct sys_segment64 {
+    uint16_t limit_lo;
+    uint32_t base_lo     : 24;
+    uint8_t type         : 4;
+    uint8_t rsvd0        : 1;
+    uint8_t dpl          : 2;
+    uint8_t present      : 1;
+    uint8_t limit_hi     : 4;
+    uint8_t avail        : 1;
+    uint8_t rsvd1        : 3;
+    uint8_t granularity  : 1;
+    uint64_t base_hi     : 40;
+    uint32_t rsvd2;
+} __attribute__((packed));
+
 
 
 static void __inline__ v3_cpuid(uint32_t target, 
 				uint32_t * eax, uint32_t * ebx, 
 				uint32_t * ecx, uint32_t * edx) {
+#ifdef __V3_64BIT__
     __asm__ __volatile__ (
 			  "cpuid\n\t"
 			  : "=a" (*eax), "=b" (*ebx), "=c" (*ecx), "=d" (*edx)
 			  : "0" (target), "2" (*ecx)
 			  );
+#elif __V3_32BIT__
+    // 32 bit code compiled with -fPIC, cannot use ebx as an ouput reg. Fantastic.
+    __asm__ __volatile__ (
+			  "pushl %%ebx\n\t"
+			  "movl %%edi, %%ebx\n\t"
+			  "cpuid\n\t"
+			  "movl %%ebx, %%edi\n\t"
+			  "popl %%ebx\n\t"
+			  : "=a" (*eax), "=D" (*ebx), "=c" (*ecx), "=d" (*edx)
+			  : "0" (target), "2" (*ecx)
+			  );
+#endif
     return;
 }