PoliEcho/kern
1
0
Fork 0
forked from PoliEcho-holding-org/kern
Code Pull Requests Activity

The great 64-bit rewrite

Browse Source 
* We did loose tasking and only have a paging skeleton, but hey it took like 4 months so i'm happy that there's something :p
This commit is contained in:
Tom-on
2026-02-08 13:04:39 +01:00
parent d9471572b8
commit 50a1d6198e
42 changed files with 2206 additions and 1786 deletions
Download Patch File Download Diff File Expand all files Collapse all files
kernel/include/idt.h
+18 -8
View File
@@ -4,21 +4,31 @@
#include <kernel.h>
#define IDT_ENTRIES 256
#define IDT_FLAG_TRAP 0x8f // P = 1, Priv = 00, S = 0, Type = 1111 (32-bit trap)
#define IDT_FLAG_INT 0x8e // P = 1, Priv = 00, S = 0, Type = 1110 (32-bit int)
#define IDT_FLAG_USER 0xee // P = 1, Priv = 11, S = 0, Type = 1110 (32-bit int)
#define IDT_FLAG_TRAP 0x8F // P = 1, Priv = 00, S = 0, Type = 1111 (32-bit trap)
#define IDT_FLAG_INT 0x8E // P = 1, Priv = 00, S = 0, Type = 1110 (32-bit int)
#define IDT_FLAG_USER 0xEE // P = 1, Priv = 11, S = 0, Type = 1110 (32-bit int)
/*
* Attribute field explanation
* 0..3 Gate type
* 4 Zero (unused)
* 5..6 DPL (privilege)
* 7 Present
*/
struct idt_entry {
uint16_t offset_low;
uint16_t selector;
uint8_t __unused;
uint8_t flags;
uint16_t offset_high;
uint8_t ist; // Only 3 low bits, rest is reserved
uint8_t attrib;
uint16_t offset_mid;
uint32_t offset_high;
uint32_t __reserved;
} __packed;
struct idt_pointer {
uint16_t limit;
uint32_t base;
uint16_t size;
uint64_t offset;
} __packed;
int idt_init(void);