build reorganization

[palacios.git] / palacios / src / palacios / vmm_lowlevel.asm

diff --git a/palacios/src/palacios/vmm_lowlevel.asm b/palacios/src/palacios/vmm_lowlevel.asm
index 0f8c758..8b22b5d 100644 (file)
--- a/palacios/src/palacios/vmm_lowlevel.asm
+++ b/palacios/src/palacios/vmm_lowlevel.asm
@@ -31,7 +31,14 @@ EXPORT GetIDTR
 EXPORT GetTR
 
 
+; CPUID functions
+EXPORT cpuid_ecx
+EXPORT cpuid_eax
+EXPORT cpuid_edx
 
+; Utility Functions
+EXPORT Set_MSR
+EXPORT Get_MSR
 
 
 
@@ -87,6 +94,105 @@ GetTR:
        ret
 
 
+;
+; cpuid_edx - return the edx register from cpuid
+;
+align 8
+cpuid_edx:
+       push    ebp
+       mov     ebp, esp
+       push    edx
+       push    ecx
+       push    ebx
+
+       mov     eax, [ebp + 8]
+       cpuid
+       mov     eax, edx
+
+       pop     ebx
+       pop     ecx
+       pop     edx
+       pop     ebp
+       ret
+
+
+;
+; cpuid_ecx - return the ecx register from cpuid
+;
+align 8
+cpuid_ecx:
+       push    ebp
+       mov     ebp, esp
+       push    edx
+       push    ecx
+       push    ebx
+
+       mov     eax, [ebp + 8]
+       cpuid
+       mov     eax, ecx
+
+       pop     ebx
+       pop     ecx
+       pop     edx
+       pop     ebp
+       ret
+
+;
+; cpuid_eax - return the eax register from cpuid
+;
+align 8
+cpuid_eax:
+       push    ebp
+       mov     ebp, esp
+       push    edx
+       push    ecx
+       push    ebx
+
+       mov     eax, [esp+4]
+       cpuid
+
+       pop     ebx
+       pop     ecx
+       pop     edx
+       pop     ebp
+       ret
+
+;
+; Set_MSR  - Set the value of a given MSR
+;
+align 8
+Set_MSR:
+       push    ebp
+       mov     ebp, esp
+       pusha
+       mov     eax, [ebp+16]
+       mov     edx, [ebp+12]
+       mov     ecx, [ebp+8]
+       wrmsr
+       popa
+       pop     ebp
+       ret
+
+
+
+;
+; Get_MSR  -  Get the value of a given MSR
+; void Get_MSR(int MSR, void * high_byte, void * low_byte);
+;
+align 8
+Get_MSR:
+       push    ebp
+       mov     ebp, esp
+       pusha
+       mov     ecx, [ebp+8]
+       rdmsr
+       mov     ebx, [ebp+12]
+       mov     [ebx], edx
+       mov     ebx, [ebp+16]
+       mov     [ebx], eax
+       popa
+       pop     ebp
+       ret