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 2010 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 36 extern "C" { 37 #endif 38 39 #ifndef _ASM 40 #include <sys/types.h> 41 #include <sys/mach_mmu.h> 42 #include <sys/md5.h> 43 #endif /* _ASM */ 44 45 #define FASTBOOT_NAME_UNIX 0 46 #define FASTBOOT_NAME_BOOTARCHIVE 1 47 48 #define FASTBOOT_MAX_FILES_MAP 2 /* max number of files that needs mapping */ 49 #define FASTBOOT_MAX_FILES_TOTAL 3 /* max number of files */ 50 51 #define FASTBOOT_MAX_MD5_HASH (FASTBOOT_MAX_FILES_MAP + 1) 52 53 #define FASTBOOT_SWTCH_PA 0x5000 /* low memory */ 54 #define FASTBOOT_STACK_OFFSET 0xe00 /* where the stack starts */ 55 #define FASTBOOT_MAGIC ('F' << 24 | 'A' << 16 | 'S' << 8 | 'T') 56 57 #define FASTBOOT_UNIX 0 58 #define FASTBOOT_BOOTARCHIVE 1 59 #define FASTBOOT_SWTCH 2 60 61 /* 62 * Default sizes for varies information we have to save across boot for 63 * fast reboot. If the actual size is bigger than what we saved, abort 64 * fast reboot. 65 */ 66 #define FASTBOOT_SAVED_MMAP_COUNT 32 67 68 #define FASTBOOT_SAVED_DRIVES_MAX 8 69 #define FASTBOOT_SAVED_DRIVES_PORT_MAX 128 70 #define FASTBOOT_SAVED_DRIVES_SIZE \ 71 ((offsetof(struct mb_drive_info, drive_ports) + \ 72 FASTBOOT_SAVED_DRIVES_PORT_MAX * sizeof (uint16_t)) * \ 73 FASTBOOT_SAVED_DRIVES_MAX) 74 75 #define FASTBOOT_SAVED_CMDLINE_LEN MMU_PAGESIZE 76 77 78 /* 79 * dboot entry address comes from 80 * usr/src/uts/i86pc/conf/Mapfile and Mapfile.64. 81 */ 82 #define DBOOT_ENTRY_ADDRESS 0xc00000 83 84 /* 85 * Fake starting virtual address for creating mapping for the new kernel 86 * and boot_archive. 87 */ 88 #define FASTBOOT_FAKE_VA (2ULL << 30) 89 90 #define FASTBOOT_TERMINATE 0xdeadbee0 /* Terminating PTEs */ 91 92 #ifndef _ASM 93 94 #define MAX_ELF32_LOAD_SECTIONS 3 95 96 /* 97 * Data structure for specifying each section in a 32-bit ELF file. 98 */ 99 typedef struct fastboot_section 100 { 101 uint32_t fb_sec_offset; /* offset */ 102 uint32_t fb_sec_paddr; /* physical address */ 103 uint32_t fb_sec_size; /* size */ 104 uint32_t fb_sec_bss_size; /* section bss size */ 105 } fastboot_section_t; 106 107 /* 108 * Data structure for describing each file that needs to be relocated from high 109 * memory to low memory for fast reboot. Currently these files are unix, the 110 * boot_archive, and the relocation function itself. 111 */ 112 typedef struct _fastboot_file { 113 uintptr_t fb_va; /* virtual address */ 114 x86pte_t *fb_pte_list_va; /* VA for PTE list */ 115 paddr_t fb_pte_list_pa; /* PA for PTE list */ 116 size_t fb_pte_list_size; /* size of PTE list */ 117 uintptr_t fb_dest_pa; /* destination PA */ 118 size_t fb_size; /* file size */ 119 uintptr_t fb_next_pa; 120 fastboot_section_t fb_sections[MAX_ELF32_LOAD_SECTIONS]; 121 int fb_sectcnt; /* actual number of sections */ 122 } fastboot_file_t; 123 124 /* 125 * Data structure containing all the information the switching routine needs 126 * for fast rebooting to the new kernel. 127 * 128 * NOTE: There is limited stack space (0x200 bytes) in the switcher to 129 * copy in the data structure. Fields that are not absolutely necessary for 130 * the switcher should be added after the fi_valid field. 131 */ 132 typedef struct _fastboot_info { 133 uint32_t fi_magic; /* magic for fast reboot */ 134 fastboot_file_t fi_files[FASTBOOT_MAX_FILES_TOTAL]; 135 int fi_has_pae; 136 uintptr_t fi_pagetable_va; 137 paddr_t fi_pagetable_pa; 138 paddr_t fi_last_table_pa; 139 paddr_t fi_new_mbi_pa; /* new multiboot info PA */ 140 int fi_valid; /* is the new kernel valid */ 141 uintptr_t fi_next_table_va; 142 paddr_t fi_next_table_pa; 143 uint_t *fi_shift_amt; 144 uint_t fi_ptes_per_table; 145 uint_t fi_lpagesize; 146 int fi_top_level; /* top level of page tables */ 147 size_t fi_pagetable_size; /* size allocated for pt */ 148 uintptr_t fi_new_mbi_va; /* new multiboot info VA */ 149 size_t fi_mbi_size; /* size allocated for mbi */ 150 uchar_t fi_md5_hash[FASTBOOT_MAX_MD5_HASH][MD5_DIGEST_LENGTH]; 151 } fastboot_info_t; 152 153 154 /* 155 * Fast reboot core functions 156 */ 157 extern void fast_reboot(); /* Entry point for fb_switch */ 158 extern void fastboot_load_kernel(char *); /* Load a new kernel */ 159 160 extern int fastboot_cksum_verify(fastboot_info_t *); 161 162 /* 163 * Additional messages explaining why Fast Reboot is not 164 * supported. 165 */ 166 extern const char *fastreboot_nosup_message(void); 167 /* 168 * Fast reboot tunables 169 */ 170 171 /* If set, the system is capable of fast reboot */ 172 extern int volatile fastreboot_capable; 173 174 /* 175 * If set, force fast reboot even if the system has 176 * drivers without quiesce(9E) implementation. 177 */ 178 extern int force_fastreboot; 179 180 /* If set, fast reboot after panic. */ 181 extern volatile int fastreboot_onpanic; 182 extern char fastreboot_onpanic_cmdline[FASTBOOT_SAVED_CMDLINE_LEN]; 183 184 /* Variables for avoiding panic/reboot loop */ 185 extern clock_t fastreboot_onpanic_uptime; 186 extern clock_t lbolt_at_boot, panic_lbolt; 187 188 #endif /* _ASM */ 189 190 #ifdef __cplusplus 191 } 192 #endif 193 194 #endif /* _SYS_FASTBOOT_H */ 195