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https://github.com/subhobhai943/SUB-OS.git
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subhobhai943
24deed8ead
- Add freestanding no_std Rust kernel layer compiled with rustc - Implement memory-safe ChaCha20 RFC-8439 stream cipher and CSPRNG in Rust - Implement intelligent thermal fan speed governor in Rust - Add printk macro bridge (kprint!, kprintln!) for Rust - Register 'rustinfo' and 'chacha20' LazyBox applets - Enable x86_64 hardware FPU & SSE (CR4.OSFXSR/OSXMMEXCPT) - Add cross-architecture C-bridge for ARM targets - Update stage2.asm kernel sector copy bounds to 448 KB
46 lines
1.1 KiB
C
46 lines
1.1 KiB
C
#include <arch/arch.h>
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#include <arch/x86_64/gdt.h>
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#include <arch/x86_64/idt.h>
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#include <arch/x86_64/isr.h>
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#include <arch/x86_64/pic.h>
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#include <arch/x86_64/pit.h>
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#include <arch/x86_64/cpuid.h>
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#include <kernel/timer.h>
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static void enable_fpu_sse(void) {
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uint64_t cr0, cr4;
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__asm__ volatile ("mov %%cr0, %0" : "=r"(cr0));
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cr0 &= ~(1ULL << 2); // Clear EM (x87 emulation)
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cr0 |= (1ULL << 1); // Set MP (Monitor co-processor)
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__asm__ volatile ("mov %0, %%cr0" :: "r"(cr0));
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__asm__ volatile ("mov %%cr4, %0" : "=r"(cr4));
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cr4 |= (1ULL << 9) | (1ULL << 10); // Set OSFXSR (bit 9) and OSXMMEXCPT (bit 10)
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__asm__ volatile ("mov %0, %%cr4" :: "r"(cr4));
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}
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void arch_early_init(void) {
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// x86_64 serial and tty initialized in main
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}
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void arch_init(void) {
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enable_fpu_sse();
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gdt_init();
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idt_init();
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isr_init();
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pic_init();
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pit_init(100);
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timer_wheel_init();
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arch_enable_interrupts();
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}
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const char* arch_get_name(void) {
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return "x86_64 (AMD64)";
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}
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uint32_t arch_get_cpu_id(void) {
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uint32_t eax = 0, ebx = 0, ecx = 0, edx = 0;
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cpuid(1, &eax, &ebx, &ecx, &edx);
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return (ebx >> 24) & 0xFF;
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}
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