x86[_64]: Separate bootloader and kernel GDT and IDT logic

From now on bootloader sets up its own minimal valid GDT and IDT. Then
the kernel replaces them with its own tables.

headers/private/kernel/arch/x86/64/descriptors.h

@@ -78,11 +78,6 @@ struct interrupt_descriptor {
 	uint32 reserved : 32;
 } _PACKED;
 
-struct gdt_idt_descr {
-	uint16 limit;
-	addr_t base;
-} _PACKED;
-
 struct tss {
 	uint32 _reserved1;
 	uint64 sp0;

headers/private/kernel/arch/x86/arch_kernel_args.h

@@ -17,9 +17,6 @@
 
 #define _PACKED __attribute__((packed))
 
-#define IDT_LIMIT 0x800
-#define GDT_LIMIT 0x800
-
 // kernel args
 typedef struct {
 	// architecture specific
@@ -30,10 +27,6 @@ typedef struct {
 	uint32	num_pgtables;
 	uint32	pgtables[MAX_BOOT_PTABLES];
 	uint64	virtual_end;
-	uint32	phys_idt;
-	uint64	vir_idt;
-	uint32	phys_gdt;
-	uint64	vir_gdt;
 	uint64	page_hole;
 	// smp stuff
 	uint32	apic_time_cv_factor; // apic ticks per second

headers/private/kernel/arch/x86/descriptors.h

@@ -49,8 +49,6 @@ enum gate_types {
 
 void x86_descriptors_preboot_init_percpu(kernel_args* args, int cpu);
 void x86_descriptors_init(kernel_args* args);
-void x86_descriptors_init_percpu(kernel_args* args, int cpu);
-status_t x86_descriptors_init_post_vm(kernel_args* args);
 
 
 #endif	// !_ASSEMBLER