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kernel: Rewrite from scratch since the current thing is held by duct tape (lmao)

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RaphProductions 2025-05-18 09:04:25 +02:00
parent d017412af5
commit a1e27c2730
117 changed files with 285 additions and 13622 deletions
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52
kernel/src/arch/x86_64/smp.c
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@ -1,52 +0,0 @@
#include "arch/x86_64/smp.h"
#include "lib/spinlock.h"
#include "limine.h"
#include "sys/log.h"
#include <stdint.h>
__attribute__((
used, section(".limine_requests"))) static volatile struct limine_mp_request
smp_request = {.id = LIMINE_MP_REQUEST, .revision = 0};
uint32_t bootstrap_lapic_id = 0;
uint32_t smp_cpu_count = 0; // Number of processors
spinlock_t smp_lock = {0};
uint32_t ctr = 0;
void smp_entry(struct limine_mp_info *smp_info) {
// spinlock_acquire(&smp_lock);
log("smp - CPU %d started (LAPIC ID: %d)\n", smp_info->processor_id,
smp_info->lapic_id);
__atomic_fetch_add(&ctr, 1, __ATOMIC_SEQ_CST);
while (1)
;
;
// spinlock_release(&smp_lock);
}
void smp_init() {
bootstrap_lapic_id = smp_request.response->bsp_lapic_id;
smp_cpu_count = smp_request.response->cpu_count;
log("smp - detected %d CPUs\n", smp_cpu_count);
for (uint64_t i = 0; i < smp_cpu_count; i++) {
if (smp_request.response->cpus[i]->lapic_id != bootstrap_lapic_id) {
uint32_t old_ctr = __atomic_load_n(&ctr, __ATOMIC_SEQ_CST);
__atomic_store_n(&smp_request.response->cpus[i]->goto_address, smp_entry,
__ATOMIC_SEQ_CST);
while (__atomic_load_n(&ctr, __ATOMIC_SEQ_CST) == old_ctr)
;
} else {
log("smp - CPU %d is the bootstrap processor (LAPIC ID: %d)\n", i,
smp_request.response->cpus[i]->lapic_id);
}
}
log("smp - initialized\n");
}