1 /*- 2 * Copyright (c) 1998 Michael Smith <msmith@freebsd.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 */ 27 28 #ifndef _LIBI386_H 29 #define _LIBI386_H 30 31 /* 32 * i386 fully-qualified device descriptor. 33 * Note, this must match the 'struct devdesc' declaration 34 * in bootstrap.h and also with struct zfs_devdesc for zfs 35 * support. 36 */ 37 struct i386_devdesc 38 { 39 struct devsw *d_dev; 40 int d_type; 41 int d_unit; 42 union 43 { 44 struct 45 { 46 void *data; 47 int slice; 48 int partition; 49 off_t offset; 50 } biosdisk; 51 struct 52 { 53 void *data; 54 } bioscd; 55 struct 56 { 57 void *data; 58 uint64_t pool_guid; 59 uint64_t root_guid; 60 } zfs; 61 } d_kind; 62 }; 63 64 /* 65 * relocater trampoline support. 66 */ 67 struct relocate_data { 68 uint32_t src; 69 uint32_t dest; 70 uint32_t size; 71 }; 72 73 extern void relocater(void); 74 75 /* 76 * The relocater_data[] is fixed size array allocated in relocater_tramp.S 77 */ 78 extern struct relocate_data relocater_data[]; 79 extern uint32_t relocater_size; 80 81 extern uint16_t relocator_ip; 82 extern uint16_t relocator_cs; 83 extern uint16_t relocator_ds; 84 extern uint16_t relocator_es; 85 extern uint16_t relocator_fs; 86 extern uint16_t relocator_gs; 87 extern uint16_t relocator_ss; 88 extern uint16_t relocator_sp; 89 extern uint32_t relocator_esi; 90 extern uint32_t relocator_eax; 91 extern uint32_t relocator_ebx; 92 extern uint32_t relocator_edx; 93 extern uint32_t relocator_ebp; 94 extern uint16_t relocator_a20_enabled; 95 96 int i386_getdev(void **vdev, const char *devspec, const char **path); 97 char *i386_fmtdev(void *vdev); 98 int i386_setcurrdev(struct env_var *ev, int flags, const void *value); 99 100 extern struct devdesc currdev; /* our current device */ 101 102 #define MAXDEV 31 /* maximum number of distinct devices */ 103 #define MAXBDDEV MAXDEV 104 105 /* exported devices XXX rename? */ 106 extern struct devsw bioscd; 107 extern struct devsw biosdisk; 108 extern struct devsw pxedisk; 109 extern struct fs_ops pxe_fsops; 110 111 int bc_add(int biosdev); /* Register CD booted from. */ 112 int bc_getdev(struct i386_devdesc *dev); /* return dev_t for (dev) */ 113 int bc_bios2unit(int biosdev); /* xlate BIOS device -> bioscd unit */ 114 int bc_unit2bios(int unit); /* xlate bioscd unit -> BIOS device */ 115 uint32_t bd_getbigeom(int bunit); /* return geometry in bootinfo format */ 116 int bd_bios2unit(int biosdev); /* xlate BIOS device -> biosdisk unit */ 117 int bd_unit2bios(int unit); /* xlate biosdisk unit -> BIOS device */ 118 int bd_getdev(struct i386_devdesc *dev); /* return dev_t for (dev) */ 119 120 ssize_t i386_copyin(const void *src, vm_offset_t dest, const size_t len); 121 ssize_t i386_copyout(const vm_offset_t src, void *dest, const size_t len); 122 ssize_t i386_readin(const int fd, vm_offset_t dest, const size_t len); 123 124 struct preloaded_file; 125 void bios_addsmapdata(struct preloaded_file *); 126 void bios_getsmap(void); 127 128 void bios_getmem(void); 129 extern uint32_t bios_basemem; /* base memory in bytes */ 130 extern uint32_t bios_extmem; /* extended memory in bytes */ 131 extern vm_offset_t memtop; /* last address of physical memory + 1 */ 132 extern vm_offset_t memtop_copyin; /* memtop less heap size for the cases */ 133 /* when heap is at the top of */ 134 /* extended memory; for other cases */ 135 /* just the same as memtop */ 136 extern uint32_t high_heap_size; /* extended memory region available */ 137 extern vm_offset_t high_heap_base; /* for use as the heap */ 138 139 void biospci_detect(void); 140 int biospci_find_devclass(uint32_t class, int index, uint32_t *locator); 141 int biospci_read_config(uint32_t locator, int offset, int width, uint32_t *val); 142 uint32_t biospci_locator(int8_t bus, uint8_t device, uint8_t function); 143 int biospci_write_config(uint32_t locator, int offset, int width, uint32_t val); 144 145 void biosacpi_detect(void); 146 147 int i386_autoload(void); 148 149 int bi_getboothowto(char *kargs); 150 void bi_setboothowto(int howto); 151 vm_offset_t bi_copyenv(vm_offset_t addr); 152 int bi_load32(char *args, int *howtop, int *bootdevp, vm_offset_t *bip, 153 vm_offset_t *modulep, vm_offset_t *kernend); 154 int bi_load64(char *args, vm_offset_t addr, vm_offset_t *modulep, 155 vm_offset_t *kernend, int add_smap); 156 int bi_checkcpu(void); 157 158 int mb_kernel_cmdline(struct preloaded_file *, struct devdesc *, char **); 159 void multiboot_tramp(uint32_t, vm_offset_t, vm_offset_t); 160 void pxe_enable(void *pxeinfo); 161 162 #endif /* _LIBI386_H */ 163