149 lines
2.5 KiB
C
149 lines
2.5 KiB
C
/*
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Copyright (C) 2015-2019 The University of Notre Dame
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This software is distributed under the GNU General Public License.
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See the file LICENSE for details.
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*/
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#ifndef X86_H
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#define X86_H
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#include "kernel/types.h"
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#define X86_SEGMENT_SELECTOR( seg, rpl ) (((seg)<<3)+(rpl))
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#define X86_SEGMENT_KERNEL_CODE X86_SEGMENT_SELECTOR(1,0)
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#define X86_SEGMENT_KERNEL_DATA X86_SEGMENT_SELECTOR(2,0)
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#define X86_SEGMENT_USER_CODE X86_SEGMENT_SELECTOR(3,3)
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#define X86_SEGMENT_USER_DATA X86_SEGMENT_SELECTOR(4,3)
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#define X86_SEGMENT_TSS X86_SEGMENT_SELECTOR(5,0)
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struct x86_eflags {
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unsigned carry:1;
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unsigned reserved0:1;
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unsigned parity:1;
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unsigned reserved1:1;
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unsigned auxcarry:1;
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unsigned reserved2:1;
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unsigned zero:1;
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unsigned sign:1;
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unsigned trap:1;
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unsigned interrupt:1;
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unsigned direction:1;
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unsigned overflow:1;
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unsigned iopl:2;
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unsigned nested:1;
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unsigned reserved3:1;
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unsigned resume:1;
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unsigned v86:1;
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unsigned align:1;
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unsigned vinterrupt:1;
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unsigned vpending:1;
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unsigned id:1;
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};
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struct x86_regs {
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int32_t eax;
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int32_t ebx;
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int32_t ecx;
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int32_t edx;
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int32_t esi;
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int32_t edi;
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int32_t ebp;
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};
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struct x86_stack {
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/* Registers saved by process_switch */
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struct x86_regs regs2;
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/* Stack frame of process_switch */
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int32_t old_ebp;
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int32_t old_eip;
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/* Pushed by intr_handler in kernelcore */
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struct x86_regs regs1;
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int32_t gs;
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int32_t fs;
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int32_t es;
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int32_t ds;
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/* Pushed by intrXX in kernelcore. */
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int32_t intr_num;
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int32_t intr_code;
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/* Pushed by X86 CPU Hardware. */
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int32_t eip;
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int32_t cs;
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struct x86_eflags eflags;
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int32_t esp;
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int32_t ss;
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};
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struct x86_segment {
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uint16_t limit0;
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uint16_t base0;
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uint8_t base1;
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unsigned type:4;
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unsigned stype:1;
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unsigned dpl:2;
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unsigned present:1;
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unsigned limit1:4;
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unsigned avail:1;
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unsigned zero:1;
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unsigned size:1;
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unsigned granularity:1;
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uint8_t base2;
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};
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struct x86_tss {
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int16_t prev;
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int16_t reserved;
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int32_t esp0;
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int16_t ss0;
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int16_t reserved0;
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int32_t esp1;
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int16_t ss1;
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int16_t reserved1;
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int32_t esp2;
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int16_t ss2;
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int16_t reserved2;
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int32_t cr3;
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int32_t eip;
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int32_t eflags;
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int32_t eax;
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int32_t ecx;
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int32_t edx;
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int32_t ebx;
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int32_t esp;
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int32_t ebp;
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int32_t esi;
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int32_t edi;
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int16_t es;
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int16_t reserved3;
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int16_t cs;
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int16_t reserved4;
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int16_t ss;
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int16_t reserved5;
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int16_t ds;
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int16_t reserved6;
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int16_t fs;
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int16_t reserved7;
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int16_t gs;
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int16_t reserved8;
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int16_t ldt;
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int16_t reserved9;
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int16_t t;
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int16_t iomap;
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};
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struct x86_gdt_init {
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int16_t size;
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struct x86_segment *base;
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};
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#endif
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