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 * $FreeBSD$ 27 */ 28 29 30 /* 31 * i386 fully-qualified device descriptor. 32 */ 33 struct i386_devdesc { 34 struct devdesc dd; /* Must be first. */ 35 union 36 { 37 struct 38 { 39 int slice; 40 int partition; 41 off_t offset; 42 } biosdisk; 43 struct 44 { 45 uint64_t pool_guid; 46 uint64_t root_guid; 47 } zfs; 48 } d_kind; 49 }; 50 51 /* 52 * relocater trampoline support. 53 */ 54 struct relocate_data { 55 uint32_t src; 56 uint32_t dest; 57 uint32_t size; 58 }; 59 60 extern void relocater(void); 61 62 /* 63 * The relocater_data[] is fixed size array allocated in relocater_tramp.S 64 */ 65 extern struct relocate_data relocater_data[]; 66 extern uint32_t relocater_size; 67 68 extern uint16_t relocator_ip; 69 extern uint16_t relocator_cs; 70 extern uint16_t relocator_ds; 71 extern uint16_t relocator_es; 72 extern uint16_t relocator_fs; 73 extern uint16_t relocator_gs; 74 extern uint16_t relocator_ss; 75 extern uint16_t relocator_sp; 76 extern uint32_t relocator_esi; 77 extern uint32_t relocator_eax; 78 extern uint32_t relocator_ebx; 79 extern uint32_t relocator_edx; 80 extern uint32_t relocator_ebp; 81 extern uint16_t relocator_a20_enabled; 82 83 int i386_getdev(void **vdev, const char *devspec, const char **path); 84 char *i386_fmtdev(void *vdev); 85 int i386_setcurrdev(struct env_var *ev, int flags, const void *value); 86 87 extern struct devdesc currdev; /* our current device */ 88 89 #define MAXDEV 31 /* maximum number of distinct devices */ 90 #define MAXBDDEV MAXDEV 91 92 /* exported devices XXX rename? */ 93 extern struct devsw bioscd; 94 extern struct devsw biosfd; 95 extern struct devsw bioshd; 96 extern struct devsw pxedisk; 97 extern struct fs_ops pxe_fsops; 98 99 int bc_add(int biosdev); /* Register CD booted from. */ 100 uint32_t bd_getbigeom(int bunit); /* return geometry in bootinfo format */ 101 int bd_bios2unit(int biosdev); /* xlate BIOS device -> biosdisk unit */ 102 int bd_unit2bios(struct i386_devdesc *); /* xlate biosdisk -> BIOS device */ 103 int bd_getdev(struct i386_devdesc *dev); /* return dev_t for (dev) */ 104 105 ssize_t i386_copyin(const void *src, vm_offset_t dest, const size_t len); 106 ssize_t i386_copyout(const vm_offset_t src, void *dest, const size_t len); 107 ssize_t i386_readin(const int fd, vm_offset_t dest, const size_t len); 108 109 struct preloaded_file; 110 void bios_addsmapdata(struct preloaded_file *); 111 void bios_getsmap(void); 112 113 void bios_getmem(void); 114 extern uint32_t bios_basemem; /* base memory in bytes */ 115 extern uint32_t bios_extmem; /* extended memory in bytes */ 116 extern vm_offset_t memtop; /* last address of physical memory + 1 */ 117 extern vm_offset_t memtop_copyin; /* memtop less heap size for the cases */ 118 /* when heap is at the top of */ 119 /* extended memory; for other cases */ 120 /* just the same as memtop */ 121 extern uint32_t high_heap_size; /* extended memory region available */ 122 extern vm_offset_t high_heap_base; /* for use as the heap */ 123 124 /* 16KB buffer space for real mode data transfers. */ 125 #define BIO_BUFFER_SIZE 0x4000 126 void *bio_alloc(size_t size); 127 void bio_free(void *ptr, size_t size); 128 129 /* 130 * Values for width parameter to biospci_{read,write}_config 131 */ 132 #define BIOSPCI_8BITS 0 133 #define BIOSPCI_16BITS 1 134 #define BIOSPCI_32BITS 2 135 136 void biospci_detect(void); 137 int biospci_find_devclass(uint32_t class, int index, uint32_t *locator); 138 int biospci_read_config(uint32_t locator, int offset, int width, uint32_t *val); 139 uint32_t biospci_locator(int8_t bus, uint8_t device, uint8_t function); 140 int biospci_write_config(uint32_t locator, int offset, int width, uint32_t val); 141 142 void biosacpi_detect(void); 143 144 int i386_autoload(void); 145 146 int bi_getboothowto(char *kargs); 147 void bi_setboothowto(int howto); 148 vm_offset_t bi_copyenv(vm_offset_t addr); 149 int bi_load32(char *args, int *howtop, int *bootdevp, vm_offset_t *bip, 150 vm_offset_t *modulep, vm_offset_t *kernend); 151 int bi_load64(char *args, vm_offset_t addr, vm_offset_t *modulep, 152 vm_offset_t *kernend, int add_smap); 153 154 void pxe_enable(void *pxeinfo); 155