1 /* $NetBSD: promlib.c,v 1.12 2024/02/07 04:02:36 msaitoh Exp $ */ 2 3 /*- 4 * Copyright (c) 1999 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Paul Kranenburg. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * Specially crafted scaled-down version of promlib for the first-stage 34 * boot program. 35 * 36 * bootxx needs the following PROM functions: 37 * prom_version() 38 * prom_getbootpath() 39 * prom_putchar() 40 * prom_halt() 41 * prom_open() 42 * prom_close() 43 * prom_seek() 44 * prom_read() 45 */ 46 47 #include <sys/errno.h> 48 #include <sys/param.h> 49 50 #include <machine/oldmon.h> 51 #include <machine/bsd_openprom.h> 52 #include <machine/promlib.h> 53 54 #include <lib/libsa/stand.h> 55 56 #define obpvec ((struct promvec *)romp) 57 58 static void obp_v2_putchar(int); 59 static int obp_v2_seek(int, u_quad_t); 60 static const char *obp_v0_getbootpath(void); 61 static const char *obp_v2_getbootpath(void); 62 63 /* 64 * PROM entry points. 65 */ 66 struct promops promops; 67 68 /* 69 * Determine whether a node has the given property. 70 */ 71 void 72 prom_halt(void) 73 { 74 75 _prom_halt(); 76 } 77 78 79 void 80 obp_v2_putchar(int c) 81 { 82 char c0; 83 84 c0 = (c & 0x7f); 85 (*promops.po_write)(promops.po_stdout, &c0, 1); 86 } 87 88 int 89 obp_v2_seek(int handle, u_quad_t offset) 90 { 91 uint32_t hi, lo; 92 93 lo = offset & ((uint32_t)-1); 94 hi = (offset >> 32) & ((uint32_t)-1); 95 (*obpvec->pv_v2devops.v2_seek)(handle, hi, lo); 96 return (0); 97 } 98 99 /* 100 * On SS1s (and also IPCs, SLCs), `promvec->pv_v0bootargs->ba_argv[1]' 101 * contains the flags that were given after the boot command. On SS2s 102 * (and ELCs, IPXs, etc. and any sun4m class machine), `pv_v0bootargs' 103 * is NULL but `*promvec->pv_v2bootargs.v2_bootargs' points to 104 * "netbsd -s" or whatever. 105 */ 106 const char * 107 obp_v0_getbootpath(void) 108 { 109 struct v0bootargs *ba = promops.po_bootcookie; 110 return (ba->ba_argv[0]); 111 } 112 113 const char * 114 obp_v2_getbootpath(void) 115 { 116 struct v2bootargs *ba = promops.po_bootcookie; 117 return (*ba->v2_bootpath); 118 } 119 120 121 static void prom_init_oldmon(void); 122 static void prom_init_obp(void); 123 124 static inline void 125 prom_init_oldmon(void) 126 { 127 struct om_vector *oldpvec = (struct om_vector *)PROM_BASE; 128 129 promops.po_version = PROM_OLDMON; 130 promops.po_revision = oldpvec->monId[0]; /*XXX*/ 131 132 promops.po_stdout = *oldpvec->outSink; 133 promops.po_putchar = oldpvec->putChar; 134 promops.po_halt = oldpvec->exitToMon; 135 promops.po_bootcookie = *oldpvec->bootParam; /* deref 1 lvl */ 136 promops.po_bootpath = obp_v0_getbootpath; 137 } 138 139 static inline void 140 prom_init_obp(void) 141 { 142 /* 143 * OBP v0, v2 & v3 144 */ 145 switch (obpvec->pv_romvec_vers) { 146 case 0: 147 promops.po_version = PROM_OBP_V0; 148 break; 149 case 2: 150 promops.po_version = PROM_OBP_V2; 151 break; 152 case 3: 153 promops.po_version = PROM_OBP_V3; 154 break; 155 default: 156 obpvec->pv_halt(); /* What else? */ 157 } 158 159 promops.po_revision = obpvec->pv_printrev; 160 promops.po_halt = obpvec->pv_halt; 161 162 /* 163 * Next, deal with prom vector differences between versions. 164 */ 165 switch (promops.po_version) { 166 case PROM_OBP_V0: 167 promops.po_stdout = *obpvec->pv_stdout; 168 promops.po_putchar = obpvec->pv_putchar; 169 promops.po_open = obpvec->pv_v0devops.v0_open; 170 promops.po_close = (void *)obpvec->pv_v0devops.v0_close; 171 promops.po_bootcookie = *obpvec->pv_v0bootargs; /* deref 1 lvl */ 172 promops.po_bootpath = obp_v0_getbootpath; 173 break; 174 case PROM_OBP_V3: 175 case PROM_OBP_V2: 176 /* Deref stdio handles one level */ 177 promops.po_stdout = *obpvec->pv_v2bootargs.v2_fd1; 178 promops.po_putchar = obp_v2_putchar; 179 promops.po_open = obpvec->pv_v2devops.v2_open; 180 promops.po_close = (void *)obpvec->pv_v2devops.v2_close; 181 promops.po_read = obpvec->pv_v2devops.v2_read; 182 promops.po_write = obpvec->pv_v2devops.v2_write; 183 promops.po_seek = obp_v2_seek; 184 promops.po_bootcookie = &obpvec->pv_v2bootargs; 185 promops.po_bootpath = obp_v2_getbootpath; 186 break; 187 } 188 } 189 190 /* 191 * Initialize our PROM operations vector. 192 */ 193 void 194 prom_init(void) 195 { 196 197 if (CPU_ISSUN4) { 198 prom_init_oldmon(); 199 romp = (void *)PROM_LOADADDR; /* Used in main() */ 200 } else if (obpvec->pv_magic == OBP_MAGIC) { 201 prom_init_obp(); 202 } else { 203 /* No Openfirmware support */ 204 } 205 } 206
Indexes created Sat Sep 20 22:09:52 GMT 2025