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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_INIT_H
#define _X86_INIT_H
#include <lib/macros.h>
#include <lib/stdint.h>
#include <machine/boot.h>
#include <machine/multiboot.h>
#include <machine/pmap.h>
/*
* Stack used to bootstrap the kernel.
*/
extern char init_stack[BOOT_STACK_SIZE];
/*
* Common stack used by APs to bootstrap.
*/
extern char init_ap_stack[BOOT_STACK_SIZE];
/*
* This variable contains the CPU ID of an AP during its early boot.
*/
extern unsigned long init_ap_id;
/*
* After its early boot, an AP enables paging and jumps to virtual
* addresses. At this point, it switches to a per-AP preallocated
* stack. This variable contains the (virtual) address of that stack.
*/
extern unsigned long init_ap_boot_stack_addr;
/*
* Print the given message and halt the system immediately.
*
* This function allows early initialization code to print something helpful
* before printk is available.
*/
void __noreturn init_panic(const char *s);
/*
* This function is called by the bootstrap code before paging is enabled.
* It establishes a direct mapping of the kernel at virtual addresses and
* returns the physical address of the page directory. It is up to the
* caller to actually enable paging.
*/
pmap_pte_t * init_paging(uint32_t eax, const struct multiboot_info *mbi);
/*
* This function is called by the AP bootstrap code before paging is enabled.
* It merely returns the physical address of the already existing kernel page
* directory.
*/
pmap_pte_t * init_ap_paging(void);
/*
* Main entry point, called directly after basic paging is initialized.
*/
void init(void);
/*
* Entry point for APs.
*/
void init_ap(void);
#endif /* _X86_INIT_H */
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