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smp: let other processors run threads

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Matheus
2023-11-30 17:54:32 -03:00
parent 1b7e671a6d
commit 57c94ebf15
7 changed files with 82 additions and 25 deletions
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kernel-src/arch/x86-64/smp.c
+10 -5
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@@ -11,7 +11,7 @@ static volatile struct limine_smp_request smprequest = {
};
// set to 1 because of the bsp
size_t cpusawake = 1;
size_t arch_smp_cpusawake = 1;
static void cpuwakeup(struct limine_smp_info *info) {
cpu_set((cpu_t *)info->extra_argument);
@@ -20,13 +20,14 @@ static void cpuwakeup(struct limine_smp_info *info) {
arch_idt_reload();
dpc_init();
arch_mmu_apswitch();
vmm_apinit();
cpu_initstate();
arch_apic_timerinit();
__atomic_add_fetch(&cpusawake, 1, __ATOMIC_SEQ_CST);
// TODO let other processors run threads and applications
for (;;) CPU_HALT();
__atomic_add_fetch(&arch_smp_cpusawake, 1, __ATOMIC_SEQ_CST);
sched_apentry();
}
// if the nosmp argument is given to the kernel, this is what the APs will jump to
@@ -34,6 +35,10 @@ static void cpuwakeuphalt(struct limine_smp_info *info) {
for (;;) CPU_HALT();
}
void arch_smp_sendipi(cpu_t *targcpu, isr_t *isr, int target) {
arch_apic_sendipi(targcpu ? targcpu->id : 0, INTERRUPT_IDTOVECTOR(isr->id), target, 0, 1);
}
void arch_smp_wakeup() {
struct limine_smp_response *response = smprequest.response;
if (response == NULL) {
@@ -64,7 +69,7 @@ void arch_smp_wakeup() {
// wait for other cpus to boot up
if (wakeupfn == cpuwakeup)
while (__atomic_load_n(&cpusawake, __ATOMIC_SEQ_CST) != response->cpu_count) asm("pause");
while (__atomic_load_n(&arch_smp_cpusawake, __ATOMIC_SEQ_CST) != response->cpu_count) asm("pause");
printf("smp: awoke other processors\n");
}