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core: remove apic.c and unused function in pic.c

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0x35c 2024-10-09 16:22:26 +02:00
parent 1640b2e125
commit 0812a06350
2 changed files with 0 additions and 75 deletions
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69
src/interrupt/apic.c
View File

@ -1,69 +0,0 @@
#include "apic.h"
#include "cpuid.h"
#include <cpuid.h>
#include <stdbool.h>
#include <stdint.h>
#define IA32_APIC_BASE_MSR 0x1B
#define IA32_APIC_BASE_MSR_BSP 0x100 // Processor is a BSP
#define IA32_APIC_BASE_MSR_ENABLE 0x800
/** returns a 'true' value if the CPU supports APIC
* and if the local APIC hasn't been disabled in MSRs
* note that this requires CPUID to be supported.
*/
bool check_apic()
{
static unsigned int eax, edx, unused;
__get_cpuid(1, &eax, &unused, &unused, &edx);
return edx & CPUID_FEAT_EDX_APIC;
}
/* Set the physical address for local APIC registers */
static void cpu_set_apic_base(uintptr_t apic)
{
uint32_t edx = 0;
uint32_t eax = (apic & 0xfffff0000) | IA32_APIC_BASE_MSR_ENABLE;
#ifdef __PHYSICAL_MEMORY_EXTENSION__
edx = (apic >> 32) & 0x0f;
#endif
cpu_set_msr(IA32_APIC_BASE_MSR, eax, edx);
}
/**
* Get the physical address of the APIC registers page
* make sure you map it to virtual memory ;)
*/
static uintptr_t cpu_get_apic_base(void)
{
uint32_t eax, edx;
cpu_get_msr(IA32_APIC_BASE_MSR, &eax, &edx);
#ifdef __PHYSICAL_MEMORY_EXTENSION__
return (eax & 0xfffff000) | ((edx & 0x0f) << 32);
#else
return (eax & 0xfffff000);
#endif
}
static uint32_t read_apic_register(uint32_t reg)
{
return *((volatile uint32_t *)(cpu_get_apic_base()) + reg);
}
static void write_apic_register(uint32_t reg, uint32_t value)
{
*((volatile uint32_t *)(cpu_get_apic_base() + reg)) = value;
}
void enable_apic(void)
{
/* Hardware enable the Local APIC if it wasn't enabled */
cpu_set_apic_base(cpu_get_apic_base());
/* Set the Spurious Interrupt Vector Register bit 8 to start receiving
* interrupts */
write_apic_register(0xF0, read_apic_register(0xF0) | 0x100);
}

6
src/interrupt/pic.c
View File

@ -56,12 +56,6 @@ void pic_remap(int offset_master, int offset_slave)
outb(PIC2_DATA, a2); outb(PIC2_DATA, a2);
} }
void pic_disable(void)
{
outb(PIC1_DATA, 0xff);
outb(PIC2_DATA, 0xff);
}
void pic_send_eoi(uint8_t irq) void pic_send_eoi(uint8_t irq)
{ {
if (irq >= 8) if (irq >= 8)