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test_cpu: simplify & detect physical address width

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git-svn-id: svn://kolibrios.org@4593 a494cfbc-eb01-0410-851d-a64ba20cac60
This commit is contained in:
CleverMouse
2014-02-25 19:12:10 +00:00
parent dc04bfc89f
commit 39d0c4cbda
2 changed files with 17 additions and 44 deletions
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57
kernel/trunk/init.inc
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@@ -345,15 +345,13 @@ align 4
proc test_cpu
locals
cpu_type dd ?
cpu_id dd ?
cpu_Intel dd ?
cpu_AMD dd ?
endl
xor eax, eax
mov [cpu_type], eax
mov [cpu_caps-OS_BASE], eax
mov [cpu_caps+4-OS_BASE], eax
mov [cpu_phys_addr_width-OS_BASE], 32
pushfd
pop eax
@@ -378,7 +376,6 @@ proc test_cpu
pop eax
xor eax, ecx
je .end_cpuid
mov [cpu_id], 1
xor eax, eax
cpuid
@@ -386,13 +383,7 @@ proc test_cpu
mov [cpu_vendor-OS_BASE], ebx
mov [cpu_vendor+4-OS_BASE], edx
mov [cpu_vendor+8-OS_BASE], ecx
cmp ebx, dword [intel_str-OS_BASE]
jne .check_AMD
cmp edx, dword [intel_str+4-OS_BASE]
jne .check_AMD
cmp ecx, dword [intel_str+8-OS_BASE]
jne .check_AMD
mov [cpu_Intel], 1
cmp eax, 1
jl .end_cpuid
mov eax, 1
@@ -402,42 +393,26 @@ proc test_cpu
mov [cpu_caps-OS_BASE], edx
mov [cpu_caps+4-OS_BASE], ecx
bt edx, CAPS_PAE
jnc @f
mov [cpu_phys_addr_width-OS_BASE], 36
@@:
mov eax, 0x80000000
cpuid
cmp eax, 0x80000008
jb @f
mov eax, 0x80000008
cpuid
mov [cpu_phys_addr_width-OS_BASE], al
@@:
mov eax, [cpu_sign-OS_BASE]
shr eax, 8
and eax, 0x0f
ret
.end_cpuid:
mov eax, [cpu_type]
ret
.check_AMD:
cmp ebx, dword [AMD_str-OS_BASE]
jne .unknown
cmp edx, dword [AMD_str+4-OS_BASE]
jne .unknown
cmp ecx, dword [AMD_str+8-OS_BASE]
jne .unknown
mov [cpu_AMD], 1
cmp eax, 1
jl .unknown
mov eax, 1
cpuid
mov [cpu_sign-OS_BASE], eax
mov [cpu_info-OS_BASE], ebx
mov [cpu_caps-OS_BASE], edx
mov [cpu_caps+4-OS_BASE], ecx
shr eax, 8
and eax, 0x0f
ret
.unknown:
mov eax, 1
cpuid
mov [cpu_sign-OS_BASE], eax
mov [cpu_info-OS_BASE], ebx
mov [cpu_caps-OS_BASE], edx
mov [cpu_caps+4-OS_BASE], ecx
shr eax, 8
and eax, 0x0f
ret
endp
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