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smp: smp_cpus

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Matheus
2024-09-16 21:36:16 -03:00
parent 55c89ea1da
commit 80abd907a8
2 changed files with 19 additions and 8 deletions
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kernel-src/arch/x86-64/smp.c
+16 -8
View File
@@ -6,6 +6,7 @@
#include <arch/idt.h>
#include <kernel/cmdline.h>
#include <arch/smp.h>
#include <kernel/alloc.h>
static volatile struct limine_smp_request smprequest = {
.id = LIMINE_SMP_REQUEST
@@ -20,7 +21,6 @@ static void cpuwakeuphalt(struct limine_smp_info *info) {
for (;;) CPU_HALT();
}
static void cpuwakeup(struct limine_smp_info *info) {
cpu_set((cpu_t *)info->extra_argument);
@@ -47,6 +47,8 @@ void arch_smp_haltallothers() {
arch_smp_sendipi(NULL, &current_cpu()->isr[0xfd], ARCH_SMP_IPI_OTHERCPUS, true);
}
cpu_t **smp_cpus;
void arch_smp_wakeup() {
interrupt_register(0xfd, (void *)cpuwakeuphalt, NULL, IPL_IGNORE);
struct limine_smp_response *response = smprequest.response;
@@ -59,21 +61,27 @@ void arch_smp_wakeup() {
printf("smp: %d processor%s\n", response->cpu_count, response->cpu_count > 1 ? "s" : "");
// use physical pages so the other cpus have it on the hhdm
size_t apcpusize = ROUND_UP(sizeof(cpu_t) * response->cpu_count, PAGE_SIZE);
cpu_t *apcpu = pmm_alloc(apcpusize / PAGE_SIZE, PMM_SECTION_DEFAULT);
__assert(apcpu);
apcpu = MAKE_HHDM(apcpu);
memset(apcpu, 0, apcpusize);
size_t cpu_size = ROUND_UP(sizeof(cpu_t) * response->cpu_count, PAGE_SIZE);
cpu_t *cpus = pmm_alloc(cpu_size / PAGE_SIZE, PMM_SECTION_DEFAULT);
__assert(cpus);
cpus = MAKE_HHDM(cpus);
memset(cpus, 0, cpu_size);
smp_cpus = alloc(response->cpu_count * sizeof(cpu_t *));
__assert(smp_cpus);
void (*wakeupfn)(struct limine_smp_info *) = cmdline_get("nosmp") ? cpuwakeuphalt : cpuwakeup;
// make the other processors jump to cpuwakeup()
for (int i = 0; i < response->cpu_count; ++i) {
// skip the bootstrap processor
if (response->cpus[i]->lapic_id == response->bsp_lapic_id)
if (response->cpus[i]->lapic_id == response->bsp_lapic_id) {
smp_cpus[i] = get_bsp();
continue;
}
response->cpus[i]->extra_argument = (uint64_t)&apcpu[i];
smp_cpus[i] = &cpus[i];
response->cpus[i]->extra_argument = (uint64_t)&cpus[i];
__atomic_store_n(&response->cpus[i]->goto_address, wakeupfn, __ATOMIC_SEQ_CST);
}
kernel-src/include/x86-64/arch/smp.h
+3
View File
@@ -6,7 +6,10 @@
#define ARCH_SMP_IPI_ALL 2
#define ARCH_SMP_IPI_OTHERCPUS 3
#include <arch/cpu.h>
extern size_t arch_smp_cpusawake;
extern cpu_t **smp_cpus;
void arch_smp_wakeup();
void arch_smp_sendipi(cpu_t *targcpu, isr_t *isr, int target, bool nmi);