HelenOS sources

root/kernel/arch/ia32/include/arch/pm.h

INCLUDED FROM

/*
 * Copyright (c) 2001-2004 Jakub Jermar
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - 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.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
 */

/** @addtogroup kernel_ia32
 * @{
 */
/** @file
 */

#ifndef KERN_ia32_PM_H_
#define KERN_ia32_PM_H_

#define IDT_ITEMS  64
#define GDT_ITEMS  7

#define NULL_DES   0
#define KTEXT_DES  1
#define KDATA_DES  2
#define UTEXT_DES  3
#define UDATA_DES  4
#define TSS_DES    5
#define VREG_DES   6  /* Virtual registers */

#ifdef CONFIG_FB

#define VESA_INIT_SEGMENT  0x8000
#define VESA_INIT_CODE_DES      7
#define VESA_INIT_DATA_DES      8
#define KTEXT32_DES        KTEXT_DES

#undef GDT_ITEMS
#define GDT_ITEMS  9

#endif /* CONFIG_FB */

#define GDT_SELECTOR(des)  ((des) << 3)

#define PL_KERNEL  0
#define PL_USER    3

#define AR_PRESENT    (1 << 7)
#define AR_DATA       (2 << 3)
#define AR_CODE       (3 << 3)
#define AR_WRITABLE   (1 << 1)
#define AR_READABLE   (1 << 1)
#define AR_INTERRUPT  (0xe)
#define AR_TRAP       (0xf)
#define AR_TSS        (0x9)

#define DPL_KERNEL  (PL_KERNEL << 5)
#define DPL_USER    (PL_USER << 5)

#define TSS_BASIC_SIZE  104
#define TSS_IOMAP_SIZE  (8 * 1024 + 1)  /* 8K for bitmap + 1 terminating byte for convenience */

#define IO_PORTS  (64 * 1024)

#ifndef __ASSEMBLER__

#include <typedefs.h>
#include <arch/context.h>

typedef struct {
        uint16_t limit;
        uint32_t base;
} __attribute__((packed)) ptr_16_32_t;

typedef struct {
        unsigned limit_0_15 : 16;
        unsigned base_0_15 : 16;
        unsigned base_16_23 : 8;
        unsigned access : 8;
        unsigned limit_16_19 : 4;
        unsigned available : 1;
        unsigned unused : 1;
        unsigned special : 1;
        unsigned granularity : 1;
        unsigned base_24_31 : 8;
} __attribute__((packed)) descriptor_t;

typedef struct {
        unsigned offset_0_15 : 16;
        unsigned selector : 16;
        unsigned unused : 8;
        unsigned access : 8;
        unsigned offset_16_31 : 16;
} __attribute__((packed)) idescriptor_t;

typedef struct {
        uint16_t link;
        unsigned : 16;
        uint32_t esp0;
        uint16_t ss0;
        unsigned : 16;
        uint32_t esp1;
        uint16_t ss1;
        unsigned : 16;
        uint32_t esp2;
        uint16_t ss2;
        unsigned : 16;
        uint32_t cr3;
        uint32_t eip;
        uint32_t eflags;
        uint32_t eax;
        uint32_t ecx;
        uint32_t edx;
        uint32_t ebx;
        uint32_t esp;
        uint32_t ebp;
        uint32_t esi;
        uint32_t edi;
        uint16_t es;
        unsigned : 16;
        uint16_t cs;
        unsigned : 16;
        uint16_t ss;
        unsigned : 16;
        uint16_t ds;
        unsigned : 16;
        uint16_t fs;
        unsigned : 16;
        uint16_t gs;
        unsigned : 16;
        uint16_t ldtr;
        unsigned : 16;
        unsigned : 16;
        uint16_t iomap_base;
        uint8_t iomap[TSS_IOMAP_SIZE];
} __attribute__((packed)) tss_t;

extern ptr_16_32_t gdtr;
extern ptr_16_32_t protected_ap_gdtr;
extern tss_t *tss_p;

extern descriptor_t gdt[];

extern void pm_init(void);

extern void gdt_setbase(descriptor_t *d, uintptr_t base);
extern void gdt_setlimit(descriptor_t *d, uint32_t limit);

extern void idt_init(void);
extern void idt_setoffset(idescriptor_t *d, uintptr_t offset);

extern void tss_initialize(tss_t *t);

#endif /* __ASSEMBLER__ */

#endif

/** @}
 */