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/*
* Copyright (c) 2010, 2012 Richard Braun.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef _X86_BOOT_H
#define _X86_BOOT_H
/*
* The kernel is physically loaded at BOOT_OFFSET by the boot loader. It
* will quickly establish the necessary mappings to run at KERNEL_OFFSET.
*
* See the linker script for more information.
*/
#define BOOT_OFFSET 0x00100000
#ifdef __LP64__
#define KERNEL_OFFSET 0xffffffff80000000
#else /* __LP64__ */
#define KERNEL_OFFSET 0xc0000000
#endif /* __LP64__ */
/*
* Size of the stack used to bootstrap the kernel.
*/
#define BOOT_STACK_SIZE 4096
/*
* Address where the MP trampoline code is copied and run at.
*
* It must reside at a free location in the first segment and be page
* aligned.
*/
#define BOOT_MP_TRAMPOLINE_ADDR 0x7000
#ifndef __ASSEMBLY__
#include <lib/macros.h>
/*
* Virtual to physical address translation macro.
*/
#define BOOT_VTOP(addr) ((unsigned long)(addr) - KERNEL_OFFSET)
/*
* Functions and data used before paging is enabled must be part of the .boot
* and .bootdata sections respectively, so that they use physical addresses.
* Once paging is enabled, their access relies on the kernel identity mapping.
*/
#define __boot __section(".boot")
#define __bootdata __section(".bootdata")
/*
* Boundaries of the .boot section.
*/
extern char _boot;
extern char _eboot;
/*
* Size of the trampoline code used for APs.
*/
extern unsigned long boot_ap_size;
/*
* Address of the MP trampoline code.
*/
void boot_ap_start(void);
#endif /* __ASSEMBLY__ */
#endif /* _X86_BOOT_H */
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