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core: add cpuid fetching code from 4996031

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This commit is contained in:
Mike Ryan 2017-02-14 16:31:29 -08:00
parent dcefa18582
commit abca698a75
4 changed files with 93 additions and 0 deletions
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2
CMakeLists.txt
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@ -275,6 +275,7 @@ set(OS_SOURCES
set(OS_POSIX_SOURCES
${PROJECT_SOURCE_DIR}/os/posix/alloc.c
${PROJECT_SOURCE_DIR}/os/posix/cpuid.c
${PROJECT_SOURCE_DIR}/os/posix/local_time.c
${PROJECT_SOURCE_DIR}/os/posix/main.c
${PROJECT_SOURCE_DIR}/os/posix/rom_file.c
@ -284,6 +285,7 @@ set(OS_POSIX_SOURCES
set(OS_WINAPI_SOURCES
${PROJECT_SOURCE_DIR}/os/winapi/alloc.c
${PROJECT_SOURCE_DIR}/os/winapi/cpuid.c
${PROJECT_SOURCE_DIR}/os/winapi/gl_config.c
${PROJECT_SOURCE_DIR}/os/winapi/gl_window.c
${PROJECT_SOURCE_DIR}/os/winapi/local_time.c

25
os/cpuid.h Normal file
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@ -0,0 +1,25 @@
//
// os/cpuid.h
//
// Functions for calling cpuid on x86.
//
// This file is subject to the terms and conditions defined in
// 'LICENSE', which is part of this source code package.
//
#ifndef __os_cpuid_h__
#define __os_cpuid_h__
#include "common.h"
struct cen64_cpuid_t {
uint32_t eax;
uint32_t ebx;
uint32_t ecx;
uint32_t edx;
};
void cen64_cpuid(uint32_t eax, uint32_t ecx, struct cen64_cpuid_t *cpuid);
void cen64_cpuid_get_vendor(char vendor[13]);
#endif

31
os/posix/cpuid.c Normal file
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@ -0,0 +1,31 @@
//
// os/posix/cpuid.c
//
// Functions for calling cpuid on x86.
//
// This file is subject to the terms and conditions defined in
// 'LICENSE', which is part of this source code package.
//
#include "os/cpuid.h"
void cen64_cpuid(uint32_t eax, uint32_t ecx, struct cen64_cpuid_t *cpuid) {
__asm__ __volatile__(
"cpuid\n\t"
: "=a"(cpuid->eax), "=b"(cpuid->ebx), "=c"(cpuid->ecx), "=d"(cpuid->edx)
: "0"(eax), "2"(ecx)
);
}
void cen64_cpuid_get_vendor(char vendor[13]) {
struct cen64_cpuid_t my_cpuid;
cen64_cpuid(0, 0, &my_cpuid);
memcpy(vendor + 0, &my_cpuid.ebx, sizeof(my_cpuid.ebx));
memcpy(vendor + 4, &my_cpuid.edx, sizeof(my_cpuid.edx));
memcpy(vendor + 8, &my_cpuid.ecx, sizeof(my_cpuid.ecx));
vendor[12] = '\0';
}

35
os/winapi/cpuid.c Normal file
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@ -0,0 +1,35 @@
//
// os/winapi/cpuid.c
//
// Functions for calling cpuid on x86.
//
// This file is subject to the terms and conditions defined in
// 'LICENSE', which is part of this source code package.
//
#include "os/cpuid.h"
#include <intrin.h>
void cen64_cpuid(uint32_t eax, uint32_t ecx, struct cen64_cpuid_t *cpuid) {
int cpuInfo[4];
__cpuidex(cpuInfo, eax, ecx);
cpuid->eax = cpuInfo[0];
cpuid->ebx = cpuInfo[1];
cpuid->ecx = cpuInfo[2];
cpuid->edx = cpuInfo[3];
}
void cen64_cpuid_get_vendor(char vendor[13]) {
int cpuInfo[4];
__cpuidex(cpuInfo, 0, 0);
memcpy(vendor + 0, cpuInfo + 1, sizeof(*cpuInfo));
memcpy(vendor + 4, cpuInfo + 3, sizeof(*cpuInfo));
memcpy(vendor + 8, cpuInfo + 2, sizeof(*cpuInfo));
vendor[sizeof(vendor) - 1] = '\0';
}