diff options
Diffstat (limited to 'sys/include/arch/amd64/gdt.h')
| -rw-r--r-- | sys/include/arch/amd64/gdt.h | 79 |
1 files changed, 0 insertions, 79 deletions
diff --git a/sys/include/arch/amd64/gdt.h b/sys/include/arch/amd64/gdt.h deleted file mode 100644 index c3ea8e8..0000000 --- a/sys/include/arch/amd64/gdt.h +++ /dev/null @@ -1,79 +0,0 @@ -/* - * Copyright (c) 2023-2024 Ian Marco Moffett and the Osmora Team. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions are met: - * - * 1. Redistributions of source code must retain the above copyright notice, - * this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the name of Hyra nor the names of its - * contributors may be used to endorse or promote products derived from - * this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" - * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE - * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR - * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF - * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS - * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN - * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) - * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE - * POSSIBILITY OF SUCH DAMAGE. - */ - -#ifndef AMD64_GDT_H_ -#define AMD64_GDT_H_ - -#include <sys/types.h> -#include <sys/cdefs.h> - -#define GDT_TSS 5 -#define KERNEL_CS 0x8 -#define KERNEL_DS 0x10 - -struct __packed gdt_entry { - uint16_t limit; - uint16_t base_low; - uint8_t base_mid; - uint8_t access; - uint8_t granularity; - uint8_t base_hi; -}; - -struct __packed gdtr { - uint16_t limit; - uintptr_t offset; -}; - -static inline void -gdt_load(struct gdtr *gdtr) -{ - __asm("lgdt %0\n" - "push $8\n" /* Push CS */ - "lea 1f(%%rip), %%rax\n" /* Load 1 label address into RAX */ - "push %%rax\n" /* Push the return address (label 1) */ - "lretq\n" /* Far return to update CS */ - "1:\n" - " mov $0x10, %%eax\n" - " mov %%eax, %%ds\n" - " mov %%eax, %%es\n" - " mov %%eax, %%fs\n" - " mov %%eax, %%gs\n" - " mov %%eax, %%ss\n" - : - : "m" (*gdtr) - : "rax", "memory" - ); -} - -extern struct gdt_entry g_gdt[256]; -extern struct gdt_entry *g_gdt_tss; -extern struct gdtr g_gdtr; - -#endif /* !AMD64_GDT_H_ */ |