From 69d68cc8392b9df7b2ee570de6066d9cf6b57e26 Mon Sep 17 00:00:00 2001 From: sbosse Date: Mon, 14 Oct 2024 23:08:16 +0200 Subject: [PATCH] Mon 14 Oct 23:06:38 CEST 2024 --- kernel/x86.h | 148 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 148 insertions(+) create mode 100644 kernel/x86.h diff --git a/kernel/x86.h b/kernel/x86.h new file mode 100644 index 0000000..5d88b2d --- /dev/null +++ b/kernel/x86.h @@ -0,0 +1,148 @@ +/* +Copyright (C) 2015-2019 The University of Notre Dame +This software is distributed under the GNU General Public License. +See the file LICENSE for details. +*/ + +#ifndef X86_H +#define X86_H + +#include "kernel/types.h" + +#define X86_SEGMENT_SELECTOR( seg, rpl ) (((seg)<<3)+(rpl)) + +#define X86_SEGMENT_KERNEL_CODE X86_SEGMENT_SELECTOR(1,0) +#define X86_SEGMENT_KERNEL_DATA X86_SEGMENT_SELECTOR(2,0) +#define X86_SEGMENT_USER_CODE X86_SEGMENT_SELECTOR(3,3) +#define X86_SEGMENT_USER_DATA X86_SEGMENT_SELECTOR(4,3) +#define X86_SEGMENT_TSS X86_SEGMENT_SELECTOR(5,0) + +struct x86_eflags { + unsigned carry:1; + unsigned reserved0:1; + unsigned parity:1; + unsigned reserved1:1; + + unsigned auxcarry:1; + unsigned reserved2:1; + unsigned zero:1; + unsigned sign:1; + + unsigned trap:1; + unsigned interrupt:1; + unsigned direction:1; + unsigned overflow:1; + + unsigned iopl:2; + unsigned nested:1; + unsigned reserved3:1; + + unsigned resume:1; + unsigned v86:1; + unsigned align:1; + unsigned vinterrupt:1; + + unsigned vpending:1; + unsigned id:1; +}; + +struct x86_regs { + int32_t eax; + int32_t ebx; + int32_t ecx; + int32_t edx; + int32_t esi; + int32_t edi; + int32_t ebp; +}; + +struct x86_stack { + /* Registers saved by process_switch */ + struct x86_regs regs2; + /* Stack frame of process_switch */ + int32_t old_ebp; + int32_t old_eip; + /* Pushed by intr_handler in kernelcore */ + struct x86_regs regs1; + int32_t gs; + int32_t fs; + int32_t es; + int32_t ds; + /* Pushed by intrXX in kernelcore. */ + int32_t intr_num; + int32_t intr_code; + /* Pushed by X86 CPU Hardware. */ + int32_t eip; + int32_t cs; + struct x86_eflags eflags; + int32_t esp; + int32_t ss; +}; + +struct x86_segment { + uint16_t limit0; + uint16_t base0; + + uint8_t base1; + + unsigned type:4; + unsigned stype:1; + unsigned dpl:2; + unsigned present:1; + + unsigned limit1:4; + unsigned avail:1; + unsigned zero:1; + unsigned size:1; + unsigned granularity:1; + + uint8_t base2; +}; + +struct x86_tss { + int16_t prev; + int16_t reserved; + int32_t esp0; + int16_t ss0; + int16_t reserved0; + int32_t esp1; + int16_t ss1; + int16_t reserved1; + int32_t esp2; + int16_t ss2; + int16_t reserved2; + int32_t cr3; + int32_t eip; + int32_t eflags; + int32_t eax; + int32_t ecx; + int32_t edx; + int32_t ebx; + int32_t esp; + int32_t ebp; + int32_t esi; + int32_t edi; + int16_t es; + int16_t reserved3; + int16_t cs; + int16_t reserved4; + int16_t ss; + int16_t reserved5; + int16_t ds; + int16_t reserved6; + int16_t fs; + int16_t reserved7; + int16_t gs; + int16_t reserved8; + int16_t ldt; + int16_t reserved9; + int16_t t; + int16_t iomap; +}; + +struct x86_gdt_init { + int16_t size; + struct x86_segment *base; +}; + +#endif