44 lines
641 B
ArmAsm
Executable file
44 lines
641 B
ArmAsm
Executable file
! _cpuid() - interface to cpuid instruction
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.sect .text; .sect .rom; .sect .data; .sect .bss
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.sect .text
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! void _cpuid(u32_t eax, u32_t *eax, u32_t *ebx, u32_t *ecx, u32_t *edx);
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.define __cpuid
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__cpuid:
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push ebp
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mov ebp, esp
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! save work registers
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push eax
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push ebx
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push ecx
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push edx
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! set eax parameter to cpuid and execute cpuid
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mov eax, 24(esp)
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.data1 0x0F, 0xA2 ! CPUID
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! store results in pointer arguments
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mov ebp, 28(esp)
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mov (ebp), eax
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mov ebp, 32(esp)
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mov (ebp), ebx
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mov ebp, 36(esp)
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mov (ebp), ecx
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mov ebp, 40(esp)
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mov (ebp), edx
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! restore registers
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pop edx
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pop ecx
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pop ebx
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pop eax
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pop ebp
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ret
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