1 /* $NetBSD: promlib.c,v 1.9 2007/03/04 06:00:48 christos 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 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * Specially crafted scaled-down version of promlib for the first-stage 41 * boot program. 42 * 43 * bootxx needs the follwoing PROM functions: 44 * prom_version() 45 * prom_getbootpath() 46 * prom_putchar() 47 * prom_halt() 48 * prom_open() 49 * prom_close() 50 * prom_seek() 51 * prom_read() 52 */ 53 54 #include <sys/errno.h> 55 #include <sys/param.h> 56 57 #include <machine/stdarg.h> 58 #include <machine/oldmon.h> 59 #include <machine/bsd_openprom.h> 60 #include <machine/promlib.h> 61 62 #include <lib/libsa/stand.h> 63 64 #define obpvec ((struct promvec *)romp) 65 66 static void obp_v2_putchar(int); 67 static int obp_v2_seek(int, u_quad_t); 68 static const char *obp_v0_getbootpath(void); 69 static const char *obp_v2_getbootpath(void); 70 71 /* 72 * PROM entry points. 73 */ 74 struct promops promops; 75 76 /* 77 * Determine whether a node has the given property. 78 */ 79 void 80 prom_halt(void) 81 { 82 83 _prom_halt(); 84 } 85 86 87 void 88 obp_v2_putchar(int c) 89 { 90 char c0; 91 92 c0 = (c & 0x7f); 93 (*promops.po_write)(promops.po_stdout, &c0, 1); 94 } 95 96 int 97 obp_v2_seek(int handle, u_quad_t offset) 98 { 99 uint32_t hi, lo; 100 101 lo = offset & ((uint32_t)-1); 102 hi = (offset >> 32) & ((uint32_t)-1); 103 (*obpvec->pv_v2devops.v2_seek)(handle, hi, lo); 104 return (0); 105 } 106 107 /* 108 * On SS1s (and also IPCs, SLCs), `promvec->pv_v0bootargs->ba_argv[1]' 109 * contains the flags that were given after the boot command. On SS2s 110 * (and ELCs, IPXs, etc. and any sun4m class machine), `pv_v0bootargs' 111 * is NULL but `*promvec->pv_v2bootargs.v2_bootargs' points to 112 * "netbsd -s" or whatever. 113 */ 114 const char * 115 obp_v0_getbootpath(void) 116 { 117 struct v0bootargs *ba = promops.po_bootcookie; 118 return (ba->ba_argv[0]); 119 } 120 121 const char * 122 obp_v2_getbootpath(void) 123 { 124 struct v2bootargs *ba = promops.po_bootcookie; 125 return (*ba->v2_bootpath); 126 } 127 128 129 static void prom_init_oldmon(void); 130 static void prom_init_obp(void); 131 132 static inline void 133 prom_init_oldmon(void) 134 { 135 struct om_vector *oldpvec = (struct om_vector *)PROM_BASE; 136 137 promops.po_version = PROM_OLDMON; 138 promops.po_revision = oldpvec->monId[0]; /*XXX*/ 139 140 promops.po_stdout = *oldpvec->outSink; 141 promops.po_putchar = oldpvec->putChar; 142 promops.po_halt = oldpvec->exitToMon; 143 promops.po_bootcookie = *oldpvec->bootParam; /* deref 1 lvl */ 144 promops.po_bootpath = obp_v0_getbootpath; 145 } 146 147 static inline void 148 prom_init_obp(void) 149 { 150 /* 151 * OBP v0, v2 & v3 152 */ 153 switch (obpvec->pv_romvec_vers) { 154 case 0: 155 promops.po_version = PROM_OBP_V0; 156 break; 157 case 2: 158 promops.po_version = PROM_OBP_V2; 159 break; 160 case 3: 161 promops.po_version = PROM_OBP_V3; 162 break; 163 default: 164 obpvec->pv_halt(); /* What else? */ 165 } 166 167 promops.po_revision = obpvec->pv_printrev; 168 promops.po_halt = obpvec->pv_halt; 169 170 /* 171 * Next, deal with prom vector differences between versions. 172 */ 173 switch (promops.po_version) { 174 case PROM_OBP_V0: 175 promops.po_stdout = *obpvec->pv_stdout; 176 promops.po_putchar = obpvec->pv_putchar; 177 promops.po_open = obpvec->pv_v0devops.v0_open; 178 promops.po_close = (void *)obpvec->pv_v0devops.v0_close; 179 promops.po_bootcookie = *obpvec->pv_v0bootargs; /* deref 1 lvl */ 180 promops.po_bootpath = obp_v0_getbootpath; 181 break; 182 case PROM_OBP_V3: 183 case PROM_OBP_V2: 184 /* Deref stdio handles one level */ 185 promops.po_stdout = *obpvec->pv_v2bootargs.v2_fd1; 186 promops.po_putchar = obp_v2_putchar; 187 promops.po_open = obpvec->pv_v2devops.v2_open; 188 promops.po_close = (void *)obpvec->pv_v2devops.v2_close; 189 promops.po_read = obpvec->pv_v2devops.v2_read; 190 promops.po_write = obpvec->pv_v2devops.v2_write; 191 promops.po_seek = obp_v2_seek; 192 promops.po_bootcookie = &obpvec->pv_v2bootargs; 193 promops.po_bootpath = obp_v2_getbootpath; 194 break; 195 } 196 } 197 198 /* 199 * Initialize our PROM operations vector. 200 */ 201 void 202 prom_init(void) 203 { 204 205 if (CPU_ISSUN4) { 206 prom_init_oldmon(); 207 romp = (void *)PROM_LOADADDR; /* Used in main() */ 208 } else if (obpvec->pv_magic == OBP_MAGIC) { 209 prom_init_obp(); 210 } else { 211 /* No Openfirmware support */ 212 } 213 } 214