fastboot.h revision 7656:2621e50fdf4a 
1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22/*
23 * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
24 * Use is subject to license terms.
25 */
26
27#ifndef	_SYS_FASTBOOT_H
28#define	_SYS_FASTBOOT_H
29
30
31/*
32 * Platform dependent instruction sequences for fast reboot
33 */
34
35#ifdef __cplusplus
36extern "C" {
37#endif
38
39#ifndef	_ASM
40#include <sys/types.h>
41#include <sys/mach_mmu.h>
42#endif	/* _ASM */
43
44#define	FASTBOOT_NAME_UNIX		0
45#define	FASTBOOT_NAME_BOOTARCHIVE	1
46
47#define	FASTBOOT_MAX_FILES_MAP	2 /* max number of files that needs mapping */
48#define	FASTBOOT_MAX_FILES_TOTAL	3 /* max number of files */
49
50#define	FASTBOOT_SWTCH_PA		0x5000	/* low memory */
51#define	FASTBOOT_STACK_OFFSET		0xe00	/* where the stack starts */
52#define	FASTBOOT_MAGIC			('F' << 24 | 'A' << 16 | 'S' << 8 | 'T')
53
54#define	FASTBOOT_UNIX		0
55#define	FASTBOOT_BOOTARCHIVE	1
56#define	FASTBOOT_SWTCH		2
57
58/*
59 * Default sizes for varies information we have to save across boot for
60 * fast reboot.  If the actual size is bigger than what we saved, abort
61 * fast reboot.
62 */
63#define	FASTBOOT_SAVED_MMAP_COUNT	32
64#define	FASTBOOT_SAVED_DRIVES_COUNT	9
65#define	FASTBOOT_SAVED_CMDLINE_LEN	MMU_PAGESIZE
66
67
68/*
69 * dboot entry address comes from
70 * usr/src/uts/i86pc/conf/Mapfile and Mapfile.64.
71 */
72#define	DBOOT_ENTRY_ADDRESS	0xc00000
73
74/*
75 * Fake starting virtual address for creating mapping for the new kernel
76 * and boot_archive.
77 */
78#define	FASTBOOT_FAKE_VA	(2ULL << 30)
79
80#define	FASTBOOT_TERMINATE	0xdeadbee0	/* Terminating PTEs */
81
82#ifndef	_ASM
83
84#define	MAX_ELF32_LOAD_SECTIONS 3
85
86/*
87 * Data structure for specifying each section in a 32-bit ELF file.
88 */
89typedef struct fastboot_section
90{
91	uint32_t		fb_sec_offset;	/* offset */
92	uint32_t		fb_sec_paddr;	/* physical address */
93	uint32_t		fb_sec_size;	/* size */
94	uint32_t		fb_sec_bss_size;	/* section bss size */
95} fastboot_section_t;
96
97/*
98 * Data structure for describing each file that needs to be relocated from high
99 * memory to low memory for fast reboot.  Currently these files are unix, the
100 * boot_archive, and the relocation function itself.
101 */
102typedef struct _fastboot_file {
103	uintptr_t		fb_va;	/* virtual address */
104	x86pte_t		*fb_pte_list_va;	/* VA for PTE list */
105	paddr_t			fb_pte_list_pa;		/* PA for PTE list */
106	uintptr_t		fb_dest_pa;	/* destination PA */
107	size_t			fb_size;	/* file size */
108	uintptr_t		fb_next_pa;
109	fastboot_section_t	fb_sections[MAX_ELF32_LOAD_SECTIONS];
110	int			fb_sectcnt;	/* actual number of sections */
111} fastboot_file_t;
112
113/*
114 * Data structure containing all the information the switching routine needs
115 * for fast rebooting to the new kernel.
116 */
117typedef struct _fastboot_info {
118	uint32_t		fi_magic; /* magic for fast reboot */
119	fastboot_file_t		fi_files[FASTBOOT_MAX_FILES_TOTAL];
120	int			fi_has_pae;
121	uintptr_t		fi_pagetable_va;
122	paddr_t			fi_pagetable_pa;
123	paddr_t			fi_last_table_pa;
124	paddr_t			fi_new_mbi_pa;	/* new multiboot info PA */
125	int			fi_valid;	/* is the new kernel valid */
126	uintptr_t		fi_next_table_va;
127	paddr_t			fi_next_table_pa;
128	uint_t			*fi_shift_amt;
129	uint_t			fi_ptes_per_table;
130	uint_t			fi_lpagesize;
131	int			fi_top_level;	/* top level of page tables */
132} fastboot_info_t;
133
134extern void fast_reboot();
135extern void load_kernel(char *);
136
137extern int fastreboot_capable;
138extern int force_fastreboot;
139
140#endif	/* _ASM */
141
142#ifdef __cplusplus
143}
144#endif
145
146#endif	/* _SYS_FASTBOOT_H */
147