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Diffstat (limited to 'i386/x15/boot.h')
-rw-r--r-- | i386/x15/boot.h | 127 |
1 files changed, 127 insertions, 0 deletions
diff --git a/i386/x15/boot.h b/i386/x15/boot.h new file mode 100644 index 0000000..ab85be0 --- /dev/null +++ b/i386/x15/boot.h @@ -0,0 +1,127 @@ +/* + * Copyright (c) 2010-2014 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 + +#include <kern/macros.h> +#include <machine/vm_param.h> + +#define VM_KERNEL_OFFSET VM_MIN_KERNEL_ADDRESS +#define STACK_SIZE PAGE_SIZE +#define pmap_pte_t void // XXX + +/* + * Macros used by the very early panic functions. + */ +#define BOOT_CGAMEM 0xb8000 +#define BOOT_CGACHARS (80 * 25) +#define BOOT_CGACOLOR 0x7 + +/* + * The kernel is physically loaded at BOOT_OFFSET by the boot loader. It + * is divided in two parts: the .boot section which uses physical addresses + * and the main kernel code and data at VM_KERNEL_OFFSET. + * + * See the linker script for more information. + */ +#define BOOT_OFFSET DECL_CONST(0x100000, UL) + +/* + * Virtual to physical address translation macro. + */ +#define BOOT_VTOP(addr) ((addr) - VM_KERNEL_OFFSET) + +/* + * 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 __ASSEMBLER__ + +#include "multiboot.h" +#include <machine/pmap.h> + +/* + * 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.text") +#define __bootdata __section(".boot.data") + +/* + * Boundaries of the .boot section. + */ +extern char _boot; +extern char _eboot; + +extern char boot_stack[STACK_SIZE]; +extern char boot_ap_stack[STACK_SIZE]; + +/* + * This variable contains the CPU ID of an AP during early initialization. + */ +extern unsigned int boot_ap_id; + +/* + * Size of the trampoline code used for APs. + */ +extern uint32_t boot_mp_trampoline_size; + +/* + * Address of the MP trampoline code. + */ +void boot_mp_trampoline(void); + +/* + * Helper functions available before paging is enabled. + * + * Any memory passed to these must also be accessible without paging. + */ +void * boot_memmove(void *dest, const void *src, size_t n); +void * boot_memset(void *s, int c, size_t n); +size_t boot_strlen(const char *s); +void __noreturn boot_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. + * + * TODO Update comment. + */ +pmap_pte_t * boot_setup_paging(const struct multiboot_raw_info *mbi, + unsigned long eax); + +/* + * Main entry point, called directly after basic paging is initialized. + */ +void boot_main(void); + +/* + * Entry point for APs. + */ +void boot_ap_main(void); + +#endif /* __ASSEMBLER__ */ + +#endif /* _X86_BOOT_H */ |