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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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/** @addtogroup ia32   
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 * @{
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 */
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/** @file
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 */
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#ifndef KERN_ia32_PM_H_
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#define KERN_ia32_PM_H_
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#define IDT_ITEMS   64  
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#define GDT_ITEMS   7
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#define VESA_INIT_SEGMENT 0x8000
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#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 */
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#ifdef CONFIG_FB
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#define VESA_INIT_SEGMENT 0x8000
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#define VESA_INIT_DES 7
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#undef GDT_ITEMS
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#define GDT_ITEMS 8
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#endif /* CONFIG_FB */
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#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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#define TSS_BASIC_SIZE  104
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#define TSS_IOMAP_SIZE  (16 * 1024 + 1) /* 16K for bitmap + 1 terminating byte for convenience */
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#define IO_PORTS    (64 * 1024)
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#ifndef __ASM__
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#include <arch/types.h>
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#include <arch/context.h>
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struct ptr_16_32 {
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    uint16_t limit;
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    uint32_t base;
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} __attribute__ ((packed));
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typedef struct ptr_16_32 ptr_16_32_t;
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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));
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typedef struct descriptor  descriptor_t;
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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));
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typedef struct idescriptor idescriptor_t;
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struct tss {
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    uint16_t link;
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    unsigned : 16;
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    uint32_t esp0;
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    uint16_t ss0;
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    unsigned : 16;
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    uint32_t esp1;
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    uint16_t ss1;
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    unsigned : 16;
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    uint32_t esp2;
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    uint16_t ss2;
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    unsigned : 16;
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    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;
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    unsigned : 16;
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    uint16_t cs;
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    unsigned : 16;
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    uint16_t ss;
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    unsigned : 16;
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    uint16_t ds;
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    unsigned : 16;
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    uint16_t fs;
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    unsigned : 16;
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    uint16_t gs;
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    unsigned : 16;
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    uint16_t ldtr;
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    unsigned : 16;
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    unsigned : 16;
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    uint16_t iomap_base;
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    uint8_t iomap[TSS_IOMAP_SIZE];
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} __attribute__ ((packed));
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typedef struct tss tss_t;
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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;
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extern struct tss *tss_p;
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extern descriptor_t gdt[];
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extern void pm_init(void);
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extern void gdt_setbase(descriptor_t *d, uintptr_t base);
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extern void gdt_setlimit(descriptor_t *d, uint32_t limit);
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extern void idt_init(void);
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extern void idt_setoffset(idescriptor_t *d, uintptr_t offset);
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extern void tss_initialize(tss_t *t);
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extern void set_tls_desc(uintptr_t tls);
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#endif /* __ASM__ */
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#endif
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/** @}
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 */