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feat: idek

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This commit is contained in:
Kevin Alavik 2025-05-30 14:52:04 +02:00
parent 4534f1da14
commit 93d09b1930
Signed by: cmpsb
GPG key ID: 10D1CC0526FDC6D7
4 changed files with 21 additions and 21 deletions
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19
kernel/src/sys/apic/lapic.c
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@ -4,9 +4,9 @@
#include <sys/acpi/madt.h>
#include <util/log.h>
#include <mm/vmm.h>
#include <boot/emk.h>
#include <stdatomic.h>
uint64_t lapic_msr = 0;
atomic_uintptr_t lapic_msr = 0;
volatile uint64_t *lapic_base = 0;
void lapic_write(uint32_t offset, uint32_t value)
@ -16,8 +16,9 @@ void lapic_write(uint32_t offset, uint32_t value)
log_early("warning: LAPIC not initialized!");
return;
}
volatile uint32_t *reg = (volatile uint32_t *)((uint8_t *)lapic_base + offset);
*reg = value;
atomic_store((_Atomic uint32_t *)reg, value);
}
uint32_t lapic_read(uint32_t offset)
@ -27,16 +28,16 @@ uint32_t lapic_read(uint32_t offset)
log_early("warning: LAPIC not initialized!");
return 0;
}
volatile uint32_t *reg = (volatile uint32_t *)((uint8_t *)lapic_base + offset);
uint32_t value = *reg;
return value;
return atomic_load((_Atomic uint32_t *)reg);
}
void lapic_init()
{
lapic_msr = rdmsr(LAPIC_BASE);
lapic_base = (volatile uint64_t *)(lapic_msr & ~(0xffff));
/* Change the lapic address that we got from MADT earlier */
lapic_addr = (uint64_t)lapic_base;
uint64_t msr = rdmsr(LAPIC_BASE);
atomic_store(&lapic_msr, msr);
lapic_base = (volatile uint64_t *)(msr & ~(0xffff));
atomic_store(&lapic_addr, (uint64_t)lapic_base);
log_early("New LAPIC base: 0x%lx", lapic_base);
}