1 /* 2 * Copyright (C) 1999, 2000, 2004, 2005 MIPS Technologies, Inc. 3 * All rights reserved. 4 * Authors: Carsten Langgaard <carstenl@mips.com> 5 * Maciej W. Rozycki <macro@mips.com> 6 * 7 * This program is free software; you can distribute it and/or modify it 8 * under the terms of the GNU General Public License (Version 2) as 9 * published by the Free Software Foundation. 10 * 11 * This program is distributed in the hope it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * for more details. 15 * 16 * You should have received a copy of the GNU General Public License along 17 * with this program; if not, write to the Free Software Foundation, Inc., 18 * 59 Temple Place - Suite 330, Boston MA 02111-1307, USA. 19 * 20 * PROM library initialisation code. 21 */ 22 #include <linux/init.h> 23 #include <linux/string.h> 24 #include <linux/kernel.h> 25 26 #include <asm/bootinfo.h> 27 #include <asm/gt64120.h> 28 #include <asm/io.h> 29 #include <asm/cacheflush.h> 30 #include <asm/smp-ops.h> 31 #include <asm/traps.h> 32 33 #include <asm/gcmpregs.h> 34 #include <asm/mips-boards/prom.h> 35 #include <asm/mips-boards/generic.h> 36 #include <asm/mips-boards/bonito64.h> 37 #include <asm/mips-boards/msc01_pci.h> 38 39 #include <asm/mips-boards/malta.h> 40 41 int prom_argc; 42 int *_prom_argv, *_prom_envp; 43 44 /* 45 * YAMON (32-bit PROM) pass arguments and environment as 32-bit pointer. 46 * This macro take care of sign extension, if running in 64-bit mode. 47 */ 48 #define prom_envp(index) ((char *)(long)_prom_envp[(index)]) 49 50 int init_debug; 51 52 static int mips_revision_corid; 53 int mips_revision_sconid; 54 55 /* Bonito64 system controller register base. */ 56 unsigned long _pcictrl_bonito; 57 unsigned long _pcictrl_bonito_pcicfg; 58 59 /* GT64120 system controller register base */ 60 unsigned long _pcictrl_gt64120; 61 62 /* MIPS System controller register base */ 63 unsigned long _pcictrl_msc; 64 65 char *prom_getenv(char *envname) 66 { 67 /* 68 * Return a pointer to the given environment variable. 69 * In 64-bit mode: we're using 64-bit pointers, but all pointers 70 * in the PROM structures are only 32-bit, so we need some 71 * workarounds, if we are running in 64-bit mode. 72 */ 73 int i, index=0; 74 75 i = strlen(envname); 76 77 while (prom_envp(index)) { 78 if(strncmp(envname, prom_envp(index), i) == 0) { 79 return(prom_envp(index+1)); 80 } 81 index += 2; 82 } 83 84 return NULL; 85 } 86 87 static inline unsigned char str2hexnum(unsigned char c) 88 { 89 if (c >= '0' && c <= '9') 90 return c - '0'; 91 if (c >= 'a' && c <= 'f') 92 return c - 'a' + 10; 93 return 0; /* foo */ 94 } 95 96 static inline void str2eaddr(unsigned char *ea, unsigned char *str) 97 { 98 int i; 99 100 for (i = 0; i < 6; i++) { 101 unsigned char num; 102 103 if((*str == '.') || (*str == ':')) 104 str++; 105 num = str2hexnum(*str++) << 4; 106 num |= (str2hexnum(*str++)); 107 ea[i] = num; 108 } 109 } 110 111 int get_ethernet_addr(char *ethernet_addr) 112 { 113 char *ethaddr_str; 114 115 ethaddr_str = prom_getenv("ethaddr"); 116 if (!ethaddr_str) { 117 printk("ethaddr not set in boot prom\n"); 118 return -1; 119 } 120 str2eaddr(ethernet_addr, ethaddr_str); 121 122 if (init_debug > 1) { 123 int i; 124 printk("get_ethernet_addr: "); 125 for (i=0; i<5; i++) 126 printk("%02x:", (unsigned char)*(ethernet_addr+i)); 127 printk("%02x\n", *(ethernet_addr+i)); 128 } 129 130 return 0; 131 } 132 133 #ifdef CONFIG_SERIAL_8250_CONSOLE 134 static void __init console_config(void) 135 { 136 char console_string[40]; 137 int baud = 0; 138 char parity = '\0', bits = '\0', flow = '\0'; 139 char *s; 140 141 if ((strstr(prom_getcmdline(), "console=")) == NULL) { 142 s = prom_getenv("modetty0"); 143 if (s) { 144 while (*s >= '0' && *s <= '9') 145 baud = baud*10 + *s++ - '0'; 146 if (*s == ',') s++; 147 if (*s) parity = *s++; 148 if (*s == ',') s++; 149 if (*s) bits = *s++; 150 if (*s == ',') s++; 151 if (*s == 'h') flow = 'r'; 152 } 153 if (baud == 0) 154 baud = 38400; 155 if (parity != 'n' && parity != 'o' && parity != 'e') 156 parity = 'n'; 157 if (bits != '7' && bits != '8') 158 bits = '8'; 159 if (flow == '\0') 160 flow = 'r'; 161 sprintf(console_string, " console=ttyS0,%d%c%c%c", baud, parity, bits, flow); 162 strcat(prom_getcmdline(), console_string); 163 pr_info("Config serial console:%s\n", console_string); 164 } 165 } 166 #endif 167 168 static void __init mips_nmi_setup(void) 169 { 170 void *base; 171 extern char except_vec_nmi; 172 173 base = cpu_has_veic ? 174 (void *)(CAC_BASE + 0xa80) : 175 (void *)(CAC_BASE + 0x380); 176 memcpy(base, &except_vec_nmi, 0x80); 177 flush_icache_range((unsigned long)base, (unsigned long)base + 0x80); 178 } 179 180 static void __init mips_ejtag_setup(void) 181 { 182 void *base; 183 extern char except_vec_ejtag_debug; 184 185 base = cpu_has_veic ? 186 (void *)(CAC_BASE + 0xa00) : 187 (void *)(CAC_BASE + 0x300); 188 memcpy(base, &except_vec_ejtag_debug, 0x80); 189 flush_icache_range((unsigned long)base, (unsigned long)base + 0x80); 190 } 191 192 extern struct plat_smp_ops msmtc_smp_ops; 193 194 void __init prom_init(void) 195 { 196 prom_argc = fw_arg0; 197 _prom_argv = (int *) fw_arg1; 198 _prom_envp = (int *) fw_arg2; 199 200 mips_display_message("LINUX"); 201 202 /* 203 * early setup of _pcictrl_bonito so that we can determine 204 * the system controller on a CORE_EMUL board 205 */ 206 _pcictrl_bonito = (unsigned long)ioremap(BONITO_REG_BASE, BONITO_REG_SIZE); 207 208 mips_revision_corid = MIPS_REVISION_CORID; 209 210 if (mips_revision_corid == MIPS_REVISION_CORID_CORE_EMUL) { 211 if (BONITO_PCIDID == 0x0001df53 || 212 BONITO_PCIDID == 0x0003df53) 213 mips_revision_corid = MIPS_REVISION_CORID_CORE_EMUL_BON; 214 else 215 mips_revision_corid = MIPS_REVISION_CORID_CORE_EMUL_MSC; 216 } 217 218 mips_revision_sconid = MIPS_REVISION_SCONID; 219 if (mips_revision_sconid == MIPS_REVISION_SCON_OTHER) { 220 switch (mips_revision_corid) { 221 case MIPS_REVISION_CORID_QED_RM5261: 222 case MIPS_REVISION_CORID_CORE_LV: 223 case MIPS_REVISION_CORID_CORE_FPGA: 224 case MIPS_REVISION_CORID_CORE_FPGAR2: 225 mips_revision_sconid = MIPS_REVISION_SCON_GT64120; 226 break; 227 case MIPS_REVISION_CORID_CORE_EMUL_BON: 228 case MIPS_REVISION_CORID_BONITO64: 229 case MIPS_REVISION_CORID_CORE_20K: 230 mips_revision_sconid = MIPS_REVISION_SCON_BONITO; 231 break; 232 case MIPS_REVISION_CORID_CORE_MSC: 233 case MIPS_REVISION_CORID_CORE_FPGA2: 234 case MIPS_REVISION_CORID_CORE_24K: 235 /* 236 * SOCit/ROCit support is essentially identical 237 * but make an attempt to distinguish them 238 */ 239 mips_revision_sconid = MIPS_REVISION_SCON_SOCIT; 240 break; 241 case MIPS_REVISION_CORID_CORE_FPGA3: 242 case MIPS_REVISION_CORID_CORE_FPGA4: 243 case MIPS_REVISION_CORID_CORE_FPGA5: 244 case MIPS_REVISION_CORID_CORE_EMUL_MSC: 245 default: 246 /* See above */ 247 mips_revision_sconid = MIPS_REVISION_SCON_ROCIT; 248 break; 249 } 250 } 251 252 switch (mips_revision_sconid) { 253 u32 start, map, mask, data; 254 255 case MIPS_REVISION_SCON_GT64120: 256 /* 257 * Setup the North bridge to do Master byte-lane swapping 258 * when running in bigendian. 259 */ 260 _pcictrl_gt64120 = (unsigned long)ioremap(MIPS_GT_BASE, 0x2000); 261 262 #ifdef CONFIG_CPU_LITTLE_ENDIAN 263 GT_WRITE(GT_PCI0_CMD_OFS, GT_PCI0_CMD_MBYTESWAP_BIT | 264 GT_PCI0_CMD_SBYTESWAP_BIT); 265 #else 266 GT_WRITE(GT_PCI0_CMD_OFS, 0); 267 #endif 268 /* Fix up PCI I/O mapping if necessary (for Atlas). */ 269 start = GT_READ(GT_PCI0IOLD_OFS); 270 map = GT_READ(GT_PCI0IOREMAP_OFS); 271 if ((start & map) != 0) { 272 map &= ~start; 273 GT_WRITE(GT_PCI0IOREMAP_OFS, map); 274 } 275 276 set_io_port_base(MALTA_GT_PORT_BASE); 277 break; 278 279 case MIPS_REVISION_SCON_BONITO: 280 _pcictrl_bonito_pcicfg = (unsigned long)ioremap(BONITO_PCICFG_BASE, BONITO_PCICFG_SIZE); 281 282 /* 283 * Disable Bonito IOBC. 284 */ 285 BONITO_PCIMEMBASECFG = BONITO_PCIMEMBASECFG & 286 ~(BONITO_PCIMEMBASECFG_MEMBASE0_CACHED | 287 BONITO_PCIMEMBASECFG_MEMBASE1_CACHED); 288 289 /* 290 * Setup the North bridge to do Master byte-lane swapping 291 * when running in bigendian. 292 */ 293 #ifdef CONFIG_CPU_LITTLE_ENDIAN 294 BONITO_BONGENCFG = BONITO_BONGENCFG & 295 ~(BONITO_BONGENCFG_MSTRBYTESWAP | 296 BONITO_BONGENCFG_BYTESWAP); 297 #else 298 BONITO_BONGENCFG = BONITO_BONGENCFG | 299 BONITO_BONGENCFG_MSTRBYTESWAP | 300 BONITO_BONGENCFG_BYTESWAP; 301 #endif 302 303 set_io_port_base(MALTA_BONITO_PORT_BASE); 304 break; 305 306 case MIPS_REVISION_SCON_SOCIT: 307 case MIPS_REVISION_SCON_ROCIT: 308 _pcictrl_msc = (unsigned long)ioremap(MIPS_MSC01_PCI_REG_BASE, 0x2000); 309 mips_pci_controller: 310 mb(); 311 MSC_READ(MSC01_PCI_CFG, data); 312 MSC_WRITE(MSC01_PCI_CFG, data & ~MSC01_PCI_CFG_EN_BIT); 313 wmb(); 314 315 /* Fix up lane swapping. */ 316 #ifdef CONFIG_CPU_LITTLE_ENDIAN 317 MSC_WRITE(MSC01_PCI_SWAP, MSC01_PCI_SWAP_NOSWAP); 318 #else 319 MSC_WRITE(MSC01_PCI_SWAP, 320 MSC01_PCI_SWAP_BYTESWAP << MSC01_PCI_SWAP_IO_SHF | 321 MSC01_PCI_SWAP_BYTESWAP << MSC01_PCI_SWAP_MEM_SHF | 322 MSC01_PCI_SWAP_BYTESWAP << MSC01_PCI_SWAP_BAR0_SHF); 323 #endif 324 /* Fix up target memory mapping. */ 325 MSC_READ(MSC01_PCI_BAR0, mask); 326 MSC_WRITE(MSC01_PCI_P2SCMSKL, mask & MSC01_PCI_BAR0_SIZE_MSK); 327 328 /* Don't handle target retries indefinitely. */ 329 if ((data & MSC01_PCI_CFG_MAXRTRY_MSK) == 330 MSC01_PCI_CFG_MAXRTRY_MSK) 331 data = (data & ~(MSC01_PCI_CFG_MAXRTRY_MSK << 332 MSC01_PCI_CFG_MAXRTRY_SHF)) | 333 ((MSC01_PCI_CFG_MAXRTRY_MSK - 1) << 334 MSC01_PCI_CFG_MAXRTRY_SHF); 335 336 wmb(); 337 MSC_WRITE(MSC01_PCI_CFG, data); 338 mb(); 339 340 set_io_port_base(MALTA_MSC_PORT_BASE); 341 break; 342 343 case MIPS_REVISION_SCON_SOCITSC: 344 case MIPS_REVISION_SCON_SOCITSCP: 345 _pcictrl_msc = (unsigned long)ioremap(MIPS_SOCITSC_PCI_REG_BASE, 0x2000); 346 goto mips_pci_controller; 347 348 default: 349 /* Unknown system controller */ 350 mips_display_message("SC Error"); 351 while (1); /* We die here... */ 352 } 353 board_nmi_handler_setup = mips_nmi_setup; 354 board_ejtag_handler_setup = mips_ejtag_setup; 355 356 prom_init_cmdline(); 357 prom_meminit(); 358 #ifdef CONFIG_SERIAL_8250_CONSOLE 359 console_config(); 360 #endif 361 /* Early detection of CMP support */ 362 if (gcmp_probe(GCMP_BASE_ADDR, GCMP_ADDRSPACE_SZ)) 363 if (!register_cmp_smp_ops()) 364 return; 365 366 if (!register_vsmp_smp_ops()) 367 return; 368 369 #ifdef CONFIG_MIPS_MT_SMTC 370 register_smp_ops(&msmtc_smp_ops); 371 #endif 372 } 373