diff options
Diffstat (limited to 'kernel/include/boot')
| -rw-r--r-- | kernel/include/boot/gdt.h | 15 | ||||
| -rw-r--r-- | kernel/include/boot/idt.h | 55 |
2 files changed, 63 insertions, 7 deletions
diff --git a/kernel/include/boot/gdt.h b/kernel/include/boot/gdt.h index ff87981..237628c 100644 --- a/kernel/include/boot/gdt.h +++ b/kernel/include/boot/gdt.h @@ -78,13 +78,12 @@ #define GDT_ENTRY(base, limit, access_flags, flags) \ { \ - (limit & 0xffff), /* limit_low */ \ - (base & 0xffff), /* base_low */ \ - ((base >> 16) & 0xff), /* base_mid */ \ - access_flags, /* access_flags */ \ - FLAGS_LIMIT_HIGH(flags, \ - ((limit >> 16) & 0xff)), /* flags_limit_high */ \ - ((base >> 24) & 0xff) /* base_high */ \ + (limit & 0xffff), /* limit_low */ \ + (base & 0xffff), /* base_low */ \ + ((base >> 16) & 0xff), /* base_mid */ \ + access_flags, /* access_flags */ \ + FLAGS_LIMIT_HIGH(flags, ((limit >> 16) & 0xff)), /* flags_limit_high */ \ + ((base >> 24) & 0xff) /* base_high */ \ } namespace GDT @@ -105,6 +104,8 @@ typedef struct { } PACKED descriptor_t; extern "C" void _GDT_flush(descriptor_t *descriptor); + +void initialize(void); void load(void); } diff --git a/kernel/include/boot/idt.h b/kernel/include/boot/idt.h new file mode 100644 index 0000000..2eda86c --- /dev/null +++ b/kernel/include/boot/idt.h @@ -0,0 +1,55 @@ +/* + * bubbl + * Copyright (C) 2024-2025 Raghuram Subramani <raghus2247@gmail.com> + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#ifndef __boot_idt_h +#define __boot_idt_h + +#include <common.h> +#include <stdint.h> + +#define IDT_ENTRY(isr, attributes) \ + { \ + (isr & 0xffff), /* isr_low */ \ + 0, /* segment_selector */ \ + 0, /* reserved */ \ + attributes, /* attributes */ \ + (isr >> 16) /* isr_high */ \ + } + +namespace IDT +{ + +typedef struct { + uint16_t isr_low; + uint16_t segment_selector; + uint8_t reserved; + uint8_t attributes; + uint16_t isr_high; +} PACKED entry_t; + +typedef struct { + uint16_t limit; /* sizeof(IDT) - 1 */ + entry_t *ptr; /* Address of IDT */ +} PACKED descriptor_t; + +void load(void); +extern "C" NORETURN void exception_handler(void); + +} + +#endif |