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/*-
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 * Copyright (c) 2008-2009, Kohsuke Ohtani
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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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 * 1. 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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 * 2. 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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 * 3. Neither the name of the author nor the names of any co-contributors
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 *    may be used to endorse or promote products derived from this software
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 *    without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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 * SUCH DAMAGE.
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 */
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#ifndef _X86_SYSPAGE_H
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#define _X86_SYSPAGE_H
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#include <conf/config.h>
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/**
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 * syspage layout:
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 *
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 * +------------------+ CONFIG_SYSPAGE_BASE
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 * | NULL pointer     |
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 * | detection page   |
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 * |                  |
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 * +------------------+ +0x1000
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 * | Interrupt stack  |
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 * |                  |
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 * |                  |
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 * +------------------+ +0x2000
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 * | Boot information |
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 * +------------------+ +0x2400
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 * | Boot stack       |
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 * +------------------+ +0x3000
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 * | PGD for boot     |
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 * | (MMU only)       |
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 * |                  |
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 * +------------------+ +0x4000
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 * | PTE0 for boot    |
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 * | (MMU only)       |
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 * |                  |
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 * +------------------+ +0x5000
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 *
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 * Note: Interrupt stack should be placed after NULL page
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 * to detect the stack overflow.
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 */
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#define SYSPAGE                CONFIG_SYSPAGE_BASE
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#define INTSTK                (SYSPAGE + 0x1000)
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#define BOOTINFO        (SYSPAGE + 0x2000)
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#define BOOTSTK                (SYSPAGE + 0x2400)
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#define BOOT_PGD        (SYSPAGE + 0x3000)
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#define BOOT_PTE0        (SYSPAGE + 0x4000)
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#define BOOT_PGD_PHYS        0x3000
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#define BOOT_PTE0_PHYS        0x4000
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#define INTSTKSZ        0x1000                /* size of interrupt stack */
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#define BOOTSTKSZ        0x0c00                /* size of boot stack */
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#define INTSTKTOP        (INTSTK + INTSTKSZ)
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#define BOOTSTKTOP        (BOOTSTK + BOOTSTKSZ)
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#ifdef CONFIG_MMU
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#define SYSPAGESZ        0x5000
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#else
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#define SYSPAGESZ        0x3000
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#endif
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#endif /* !_X86_SYSPAGE_H */