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This commit is contained in:
Jozef Nagy 2025-01-20 21:52:47 +01:00
commit 94aad4b8e1
Signed by untrusted user who does not match committer: crz
GPG key ID: 459A4811CEAC7068
77 changed files with 4414 additions and 0 deletions
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35
boot/arch/x86_64/common/cpu/gdt.c Normal file
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/*********************************************************************************/
/* Module Name: gdt.c */
/* Project: AurixOS */
/* */
/* Copyright (c) 2024-2025 Jozef Nagy */
/* */
/* This source is subject to the MIT License. */
/* See License.txt in the root of this repository. */
/* All other rights reserved. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR */
/* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, */
/* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE */
/* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER */
/* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, */
/* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE */
/* SOFTWARE. */
/*********************************************************************************/
#include <arch/cpu/gdt.h>
#include <arch/mm/paging.h>
#include <stdint.h>
void gdt_set_entry(struct gdt_descriptor *entry, uint32_t base, uint32_t limit, uint8_t access,
uint8_t flags)
{
entry->limit_low = (limit >> 8) & 0xffff;
entry->base_low = (base >> 8) & 0xffff;
entry->base_mid = (base >> 16) & 0xff;
entry->access = access;
entry->limit_high = (limit >> 16) & 0xf;
entry->flags = flags;
entry->base_high = (base >> 24) & 0xff;
}