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boreddevnl
2026-04-12 18:23:38 +02:00
parent a1b6d58b77
commit d13fca2d4a
5 changed files with 442 additions and 25 deletions
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71
src/core/platform.c
View File

@@ -5,6 +5,7 @@
#include "limine.h"
#include <stddef.h>
#include "platform.h"
#include "kutils.h"
static volatile struct limine_hhdm_request hhdm_request __attribute__((used, section(".requests"))) = {
.id = LIMINE_HHDM_REQUEST,
.revision = 0,
@@ -80,3 +81,73 @@ void platform_get_cpu_vendor(char *vendor) {
*((uint32_t *)&p[8]) = ecx;
p[12] = '\0';
}
void platform_get_cpu_info(cpu_info_t *info) {
uint32_t eax, ebx, ecx, edx;
// CPUID leaf 1: basic feature information
asm volatile("cpuid" : "=a"(eax), "=b"(ebx), "=c"(ecx), "=d"(edx) : "a"(1));
info->stepping = eax & 0xF;
info->model = (eax >> 4) & 0xF;
info->family = (eax >> 8) & 0xF;
info->microcode = (ebx >> 8) & 0xFF;
info->flags = ((uint64_t)ecx << 32) | edx; // ECX and EDX contain feature flags
info->cache_size = (ebx >> 16) & 0xFF; // Cache line size in bytes
}
void platform_get_cpu_flags(char *flags_str) {
uint32_t eax, ebx, ecx, edx;
flags_str[0] = '\0';
// CPUID leaf 1
asm volatile("cpuid" : "=a"(eax), "=b"(ebx), "=c"(ecx), "=d"(edx) : "a"(1));
// ECX flags
if (ecx & (1 << 0)) k_strcpy(flags_str + k_strlen(flags_str), "sse3 ");
if (ecx & (1 << 1)) k_strcpy(flags_str + k_strlen(flags_str), "pclmulqdq ");
if (ecx & (1 << 3)) k_strcpy(flags_str + k_strlen(flags_str), "monitor ");
if (ecx & (1 << 6)) k_strcpy(flags_str + k_strlen(flags_str), "ssse3 ");
if (ecx & (1 << 9)) k_strcpy(flags_str + k_strlen(flags_str), "sdbg ");
if (ecx & (1 << 12)) k_strcpy(flags_str + k_strlen(flags_str), "fma ");
if (ecx & (1 << 13)) k_strcpy(flags_str + k_strlen(flags_str), "cx16 ");
if (ecx & (1 << 19)) k_strcpy(flags_str + k_strlen(flags_str), "sse4_1 ");
if (ecx & (1 << 20)) k_strcpy(flags_str + k_strlen(flags_str), "sse4_2 ");
if (ecx & (1 << 23)) k_strcpy(flags_str + k_strlen(flags_str), "popcnt ");
if (ecx & (1 << 25)) k_strcpy(flags_str + k_strlen(flags_str), "aes ");
if (ecx & (1 << 26)) k_strcpy(flags_str + k_strlen(flags_str), "xsave ");
if (ecx & (1 << 28)) k_strcpy(flags_str + k_strlen(flags_str), "avx ");
// EDX flags
if (edx & (1 << 0)) k_strcpy(flags_str + k_strlen(flags_str), "fpu ");
if (edx & (1 << 3)) k_strcpy(flags_str + k_strlen(flags_str), "pse ");
if (edx & (1 << 4)) k_strcpy(flags_str + k_strlen(flags_str), "tsc ");
if (edx & (1 << 6)) k_strcpy(flags_str + k_strlen(flags_str), "pae ");
if (edx & (1 << 8)) k_strcpy(flags_str + k_strlen(flags_str), "cx8 ");
if (edx & (1 << 9)) k_strcpy(flags_str + k_strlen(flags_str), "apic ");
if (edx & (1 << 11)) k_strcpy(flags_str + k_strlen(flags_str), "sep ");
if (edx & (1 << 15)) k_strcpy(flags_str + k_strlen(flags_str), "cmov ");
if (edx & (1 << 23)) k_strcpy(flags_str + k_strlen(flags_str), "mmx ");
if (edx & (1 << 24)) k_strcpy(flags_str + k_strlen(flags_str), "fxsr ");
if (edx & (1 << 25)) k_strcpy(flags_str + k_strlen(flags_str), "sse ");
if (edx & (1 << 26)) k_strcpy(flags_str + k_strlen(flags_str), "sse2 ");
// Extended leaf 0x80000001 for advanced flags
asm volatile("cpuid" : "=a"(eax), "=b"(ebx), "=c"(ecx), "=d"(edx) : "a"(0x80000001));
if (edx & (1 << 11)) k_strcpy(flags_str + k_strlen(flags_str), "syscall ");
if (edx & (1 << 20)) k_strcpy(flags_str + k_strlen(flags_str), "nx ");
if (edx & (1 << 26)) k_strcpy(flags_str + k_strlen(flags_str), "pdpe1gb ");
if (edx & (1 << 27)) k_strcpy(flags_str + k_strlen(flags_str), "rdtscp ");
if (edx & (1 << 29)) k_strcpy(flags_str + k_strlen(flags_str), "lm ");
if (ecx & (1 << 0)) k_strcpy(flags_str + k_strlen(flags_str), "lahf_lm ");
if (ecx & (1 << 5)) k_strcpy(flags_str + k_strlen(flags_str), "abm ");
// Remove trailing space
int len = k_strlen(flags_str);
if (len > 0 && flags_str[len-1] == ' ') {
flags_str[len-1] = '\0';
}
}

11
src/core/platform.h
View File

@@ -6,10 +6,21 @@
#include <stdint.h>
typedef struct {
uint32_t family;
uint32_t model;
uint32_t stepping;
uint32_t microcode;
uint64_t flags;
uint32_t cache_size;
} cpu_info_t;
void platform_init(void);
uint64_t p2v(uint64_t phys);
uint64_t v2p(uint64_t virt);
void platform_get_cpu_model(char *model);
void platform_get_cpu_vendor(char *vendor);
void platform_get_cpu_info(cpu_info_t *info);
void platform_get_cpu_flags(char *flags_str);
#endif