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Rewrite init app in C, introduce MSL (MOP3 System Library)
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This commit is contained in:
Kamil Kowalczyk
2026-01-04 01:11:31 +01:00
parent 2c954a9ca9
commit e077d322f4
57 changed files with 214 additions and 120 deletions
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34
kernel/amd64/smp.c
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@@ -13,38 +13,31 @@
#include <sys/syscall.h>
/// Cpu ID counter
static uint32_t cpu_counter = 0;
/// Lock for \ref cpu_counter
static spin_lock_t cpu_counter_lock = SPIN_LOCK_INIT;
static atomic_uint cpu_counter = 0;
/// The CPUs
static struct cpu cpus[CPUS_MAX];
static bool thiscpu_init = false;
void amd64_thiscpu_set_init (void) { thiscpu_init = true; }
static atomic_int cpu_init_count;
/// Allocate a CPU structure
struct cpu* cpu_make (void) {
spin_lock (&cpu_counter_lock);
int id = cpu_counter++;
spin_unlock (&cpu_counter_lock);
int id = atomic_fetch_add (&cpu_counter, 1);
struct cpu* cpu = &cpus[id];
memset (cpu, 0, sizeof (*cpu));
cpu->lock = SPIN_LOCK_INIT;
cpu->id = id;
cpu->self = cpu;
amd64_wrmsr (MSR_SHADOW_GS_BASE, (uint64_t)cpu);
amd64_wrmsr (MSR_GS_BASE, (uint64_t)cpu);
return cpu;
}
struct cpu* cpu_get (void) {
if (!thiscpu_init)
return NULL;
return (struct cpu*)amd64_rdmsr (MSR_SHADOW_GS_BASE);
struct cpu* ptr = (struct cpu*)amd64_rdmsr (MSR_GS_BASE);
return ptr;
}
/// Bootstrap code for non-BSP CPUs
@@ -56,27 +49,36 @@ static void amd64_smp_bootstrap (struct limine_mp_info* mp_info) {
amd64_init (cpu, true); /* gdt + idt */
syscall_init ();
thiscpu->lapic_ticks = amd64_lapic_init (2500);
thiscpu->lapic_ticks = amd64_lapic_init (10000);
amd64_lapic_tick (thiscpu->lapic_ticks);
DEBUG ("CPU %u is online!\n", thiscpu->id);
__asm__ volatile ("sti");
atomic_fetch_sub (&cpu_init_count, 1);
for (;;)
;
}
/// Initialize SMP subsystem for AMD64. Start AP CPUs
void smp_init (void) {
thiscpu->lapic_ticks = amd64_lapic_init (2500);
thiscpu->lapic_ticks = amd64_lapic_init (10000);
struct limine_mp_response* mp = limine_mp_request.response;
cpu_init_count = mp->cpu_count - 1; /* Don't include BSP */
for (size_t i = 0; i < mp->cpu_count; i++) {
if (mp->cpus[i]->lapic_id != thiscpu->id) {
DEBUG ("Trying CPU %u\n", mp->cpus[i]->lapic_id);
mp->cpus[i]->goto_address = &amd64_smp_bootstrap;
}
}
while (atomic_load (&cpu_init_count) > 0)
;
DEBUG ("All CPUs are online\n");
}