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1 jermar 1
/*
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 * Copyright (C) 2001-2004 Jakub Jermar
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 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 *
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 * - Redistributions of source code must retain the above copyright
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 *   notice, this list of conditions and the following disclaimer.
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 * - Redistributions in binary form must reproduce the above copyright
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 *   notice, this list of conditions and the following disclaimer in the
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 *   documentation and/or other materials provided with the distribution.
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 * - The name of the author may not be used to endorse or promote products
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 *   derived from this software without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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1702 cejka 29
 /** @addtogroup ia32  
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 * @{
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 */
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/** @file
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 */
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1 jermar 35
#ifndef __PM_H__
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#define __PM_H__
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#define IDT_ITEMS 64
1292 vana 39
#define GDT_ITEMS 7
1 jermar 40
 
1287 vana 41
#define VESA_INIT_SEGMENT 0x8000
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1 jermar 43
#define NULL_DES    0
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#define KTEXT_DES   1
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#define KDATA_DES   2
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#define UTEXT_DES   3
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#define UDATA_DES   4
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#define TSS_DES     5
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#define TLS_DES         6 /* Pointer to Thread-Local-Storage data */
1292 vana 50
 
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#ifdef CONFIG_FB
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#define VESA_INIT_SEGMENT 0x8000
1287 vana 54
#define VESA_INIT_DES 7
1292 vana 55
#undef GDT_ITEMS
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#define GDT_ITEMS 8
1 jermar 57
 
1292 vana 58
#endif /* CONFIG_FB */
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1 jermar 61
#define selector(des)   ((des)<<3)
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#define PL_KERNEL   0
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#define PL_USER     3
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#define AR_PRESENT  (1<<7)
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#define AR_DATA     (2<<3)
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#define AR_CODE     (3<<3)
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#define AR_WRITABLE (1<<1)
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#define AR_INTERRUPT    (0xe)
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#define AR_TSS      (0x9)
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#define DPL_KERNEL  (PL_KERNEL<<5)
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#define DPL_USER    (PL_USER<<5)
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1187 jermar 76
#define TSS_BASIC_SIZE  104
1201 jermar 77
#define TSS_IOMAP_SIZE  (16*1024+1) /* 16K for bitmap + 1 terminating byte for convenience */
1 jermar 78
 
1203 jermar 79
#define IO_PORTS    (64*1024)
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300 palkovsky 81
#ifndef __ASM__
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#include <arch/types.h>
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#include <typedefs.h>
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#include <arch/context.h>
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1 jermar 87
struct ptr_16_32 {
1780 jermar 88
    uint16_t limit;
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    uint32_t base;
1 jermar 90
} __attribute__ ((packed));
1187 jermar 91
typedef struct ptr_16_32 ptr_16_32_t;
1 jermar 92
 
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struct descriptor {
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    unsigned limit_0_15: 16;
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    unsigned base_0_15: 16;
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    unsigned base_16_23: 8;
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    unsigned access: 8;
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    unsigned limit_16_19: 4;
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    unsigned available: 1;
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    unsigned unused: 1;
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    unsigned special: 1;
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    unsigned granularity : 1;
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    unsigned base_24_31: 8;
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} __attribute__ ((packed));
1187 jermar 105
typedef struct descriptor  descriptor_t;
1 jermar 106
 
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struct idescriptor {
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    unsigned offset_0_15: 16;
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    unsigned selector: 16;
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    unsigned unused: 8;
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    unsigned access: 8;
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    unsigned offset_16_31: 16;
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} __attribute__ ((packed));
1187 jermar 114
typedef struct idescriptor idescriptor_t;
1 jermar 115
 
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struct tss {
1780 jermar 117
    uint16_t link;
1 jermar 118
    unsigned : 16;
1780 jermar 119
    uint32_t esp0;
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    uint16_t ss0;
1 jermar 121
    unsigned : 16;
1780 jermar 122
    uint32_t esp1;
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    uint16_t ss1;
1 jermar 124
    unsigned : 16;
1780 jermar 125
    uint32_t esp2;
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    uint16_t ss2;
1 jermar 127
    unsigned : 16;
1780 jermar 128
    uint32_t cr3;
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    uint32_t eip;
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    uint32_t eflags;
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    uint32_t eax;
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    uint32_t ecx;
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    uint32_t edx;
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    uint32_t ebx;
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    uint32_t esp;
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    uint32_t ebp;
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    uint32_t esi;
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    uint32_t edi;
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    uint16_t es;
1 jermar 140
    unsigned : 16;
1780 jermar 141
    uint16_t cs;
1 jermar 142
    unsigned : 16;
1780 jermar 143
    uint16_t ss;
1 jermar 144
    unsigned : 16;
1780 jermar 145
    uint16_t ds;
1 jermar 146
    unsigned : 16;
1780 jermar 147
    uint16_t fs;
1 jermar 148
    unsigned : 16;
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    uint16_t gs;
1 jermar 150
    unsigned : 16;
1780 jermar 151
    uint16_t ldtr;
1 jermar 152
    unsigned : 16;
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    unsigned : 16;
1780 jermar 154
    uint16_t iomap_base;
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    uint8_t iomap[TSS_IOMAP_SIZE];
1 jermar 156
} __attribute__ ((packed));
1187 jermar 157
typedef struct tss tss_t;
1 jermar 158
 
1187 jermar 159
extern ptr_16_32_t gdtr;
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extern ptr_16_32_t bootstrap_gdtr;
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extern ptr_16_32_t protected_ap_gdtr;
1 jermar 162
extern struct tss *tss_p;
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1187 jermar 164
extern descriptor_t gdt[];
1 jermar 165
 
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extern void pm_init(void);
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1780 jermar 168
extern void gdt_setbase(descriptor_t *d, uintptr_t base);
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extern void gdt_setlimit(descriptor_t *d, uint32_t limit);
1 jermar 170
 
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extern void idt_init(void);
1780 jermar 172
extern void idt_setoffset(idescriptor_t *d, uintptr_t offset);
1 jermar 173
 
1187 jermar 174
extern void tss_initialize(tss_t *t);
1780 jermar 175
extern void set_tls_desc(uintptr_t tls);
1 jermar 176
 
300 palkovsky 177
#endif /* __ASM__ */
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1 jermar 179
#endif
1702 cejka 180
 
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 /** @}
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 */
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