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Implement CPUID feature checks

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The bootloader now shows an error message instead of hanging with
a black screen on incompatible CPUs.
This commit is contained in:
Tibor Nagy
2020-06-08 00:21:45 +02:00
parent ab0603206f
commit a022b64a05
3 changed files with 94 additions and 0 deletions
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x86_64/cpuid.asm
+27
View File
@@ -0,0 +1,27 @@
%include "cpuid.inc"
required_features:
.edx equ features_edx.fpu | features_edx.sse | features_edx.pae | features_edx.pse | features_edx.pge | features_edx.fxsr
.ecx equ features_ecx.xsave
check_cpuid:
mov eax, 1
cpuid
and edx, required_features.edx
cmp edx, required_features.edx
jne .error
and ecx, required_features.ecx
cmp ecx, required_features.ecx
jne .error
ret
.error:
mov si, .err_features
call print
.halt:
jmp .halt
.err_features: db "Required CPU features are not present",13,10,0
x86_64/cpuid.inc
+64
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@@ -0,0 +1,64 @@
features_edx:
.fpu equ 1 << 0
.vme equ 1 << 1
.de equ 1 << 2
.pse equ 1 << 3
.tsc equ 1 << 4
.msr equ 1 << 5
.pae equ 1 << 6
.mce equ 1 << 7
.cx8 equ 1 << 8
.apic equ 1 << 9
.sep equ 1 << 11
.mtrr equ 1 << 12
.pge equ 1 << 13
.mca equ 1 << 14
.cmov equ 1 << 15
.pat equ 1 << 16
.pse_36 equ 1 << 17
.psn equ 1 << 18
.clfsh equ 1 << 19
.ds equ 1 << 21
.acpi equ 1 << 22
.mmx equ 1 << 23
.fxsr equ 1 << 24
.sse equ 1 << 25
.sse2 equ 1 << 26
.ss equ 1 << 27
.htt equ 1 << 28
.tm equ 1 << 29
.ia64 equ 1 << 30
.pbe equ 1 << 31
features_ecx:
.sse3 equ 1 << 0
.pclmulqdq equ 1 << 1
.dtes64 equ 1 << 2
.monitor equ 1 << 3
.ds_cpl equ 1 << 4
.vmx equ 1 << 5
.smx equ 1 << 6
.est equ 1 << 7
.tm2 equ 1 << 8
.ssse3 equ 1 << 9
.cnxt_id equ 1 << 10
.sdbg equ 1 << 11
.fma equ 1 << 12
.cmpxchg16b equ 1 << 13
.xtpr equ 1 << 14
.pdcm equ 1 << 15
.pcid equ 1 << 17
.dca equ 1 << 18
.sse4_1 equ 1 << 19
.sse4_2 equ 1 << 20
.x2apic equ 1 << 21
.movbe equ 1 << 22
.popcnt equ 1 << 23
.tsc_deadline equ 1 << 24
.aes equ 1 << 25
.xsave equ 1 << 26
.osxsave equ 1 << 27
.avx equ 1 << 28
.f16c equ 1 << 29
.rdrand equ 1 << 30
.hypervisor equ 1 << 31
x86_64/startup-common.asm
+3
View File
@@ -42,6 +42,8 @@ startup:
jmp .loaded_kernel
.loaded_kernel:
call check_cpuid
call memory_map
call vesa
@@ -139,6 +141,7 @@ load_extent:
%include "memory_map.asm"
%include "vesa.asm"
%include "initialize.asm"
%include "cpuid.asm"
%ifndef KERNEL
%include "redoxfs.asm"
%ifndef FILESYSTEM