152 lines
3.3 KiB
C
152 lines
3.3 KiB
C
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/*
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** Copyright 2001-2002, Travis Geiselbrecht. All rights reserved.
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** Distributed under the terms of the NewOS License.
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*/
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#ifndef _KERNEL_ARCH_x86_CPU_H
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#define _KERNEL_ARCH_x86_CPU_H
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/* ??? why include this as we're normally included from that file! */
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#include <arch/cpu.h>
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#define KERNEL_CODE_SEG 0x8
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#define KERNEL_DATA_SEG 0x10
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#define USER_CODE_SEG 0x1b
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#define USER_DATA_SEG 0x23
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#define TSS 0x28
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#define PAGE_SIZE 4096
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#define _BIG_ENDIAN 0
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#define _LITTLE_ENDIAN 1
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typedef struct desc_struct {
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unsigned int a,b;
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} desc_table;
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struct tss {
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uint16 prev_task;
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uint16 unused0;
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uint32 sp0;
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uint32 ss0;
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uint32 sp1;
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uint32 ss1;
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uint32 sp2;
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uint32 ss2;
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uint32 sp3;
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uint32 ss3;
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uint32 cr3;
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uint32 eip, eflags, eax, ecx, edx, ebx, esp, ebp, esi, edi;
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uint32 es, cs, ss, ds, fs, gs;
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uint32 ldt_seg_selector;
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uint16 unused1;
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uint16 io_map_base;
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};
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struct tss_descriptor {
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uint16 limit_00_15;
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uint16 base_00_15;
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uint32 base_23_16 : 8;
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uint32 type : 4;
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uint32 zero : 1;
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uint32 dpl : 2;
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uint32 present : 1;
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uint32 limit_19_16 : 4;
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uint32 avail : 1;
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uint32 zero1 : 1;
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uint32 zero2 : 1;
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uint32 granularity : 1;
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uint32 base_31_24 : 8;
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};
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typedef struct ptentry {
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unsigned int present:1;
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unsigned int rw:1;
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unsigned int user:1;
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unsigned int write_through:1;
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unsigned int cache_disabled:1;
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unsigned int accessed:1;
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unsigned int dirty:1;
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unsigned int reserved:1;
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unsigned int global:1;
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unsigned int avail:3;
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unsigned int addr:20;
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} ptentry;
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typedef struct pdentry {
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unsigned int present:1;
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unsigned int rw:1;
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unsigned int user:1;
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unsigned int write_through:1;
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unsigned int cache_disabled:1;
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unsigned int accessed:1;
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unsigned int reserved:1;
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unsigned int page_size:1;
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unsigned int global:1;
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unsigned int avail:3;
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unsigned int addr:20;
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} pdentry;
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#define nop() __asm__ ("nop"::)
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void setup_system_time(unsigned int cv_factor);
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void i386_context_switch(unsigned int **old_esp, unsigned int *new_esp, addr new_pgdir);
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void i386_enter_uspace(addr entry, void *args, addr ustack_top);
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void i386_set_kstack(addr kstack);
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void i386_switch_stack_and_call(addr stack, void (*func)(void *), void *arg);
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void i386_swap_pgdir(addr new_pgdir);
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void i386_fsave_swap(void *old_fpu_state, void *new_fpu_state);
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void i386_fxsave_swap(void *old_fpu_state, void *new_fpu_state);
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#define read_dr3(value) \
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__asm__("movl %%dr3,%0" : "=r" (value))
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#define write_dr3(value) \
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__asm__("movl %0,%%dr3" :: "r" (value))
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#define invalidate_TLB(va) \
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__asm__("invlpg (%0)" : : "r" (va))
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#define out8(value,port) \
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__asm__ ("outb %%al,%%dx"::"a" (value),"d" (port))
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#define out16(value,port) \
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__asm__ ("outw %%ax,%%dx"::"a" (value),"d" (port))
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#define out32(value,port) \
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__asm__ ("outl %%eax,%%dx"::"a" (value),"d" (port))
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#define in8(port) ({ \
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unsigned char _v; \
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__asm__ volatile ("inb %%dx,%%al":"=a" (_v):"d" (port)); \
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_v; \
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})
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#define in16(port) ({ \
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unsigned short _v; \
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__asm__ volatile ("inw %%dx,%%ax":"=a" (_v):"d" (port)); \
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_v; \
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})
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#define in32(port) ({ \
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unsigned int _v; \
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__asm__ volatile ("inl %%dx,%%eax":"=a" (_v):"d" (port)); \
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_v; \
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})
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#define out8_p(value,port) \
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__asm__ ("outb %%al,%%dx\n" \
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"\tjmp 1f\n" \
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"1:\tjmp 1f\n" \
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"1:"::"a" (value),"d" (port))
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#define in8_p(port) ({ \
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unsigned char _v; \
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__asm__ volatile ("inb %%dx,%%al\n" \
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"\tjmp 1f\n" \
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"1:\tjmp 1f\n" \
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"1:":"=a" (_v):"d" (port)); \
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_v; \
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})
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#endif
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