2 * BRIEF MODULE DESCRIPTION
3 * PROM library initialisation code, assuming a version of
4 * pmon is the boot code.
6 * Copyright 2000,2001 MontaVista Software Inc.
7 * Author: MontaVista Software, Inc.
8 * ppopov@mvista.com or source@mvista.com
10 * This file was derived from Carsten Langgaard's
11 * arch/mips/mips-boards/xx files.
13 * Carsten Langgaard, carstenl@mips.com
14 * Copyright (C) 1999,2000 MIPS Technologies, Inc. All rights reserved.
16 * This program is free software; you can redistribute it and/or modify it
17 * under the terms of the GNU General Public License as published by the
18 * Free Software Foundation; either version 2 of the License, or (at your
19 * option) any later version.
21 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
22 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
23 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
24 * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
27 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
28 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 * You should have received a copy of the GNU General Public License along
33 * with this program; if not, write to the Free Software Foundation, Inc.,
34 * 675 Mass Ave, Cambridge, MA 02139, USA.
37 #include <linux/module.h>
38 #include <linux/kernel.h>
39 #include <linux/init.h>
40 #include <linux/string.h>
41 #include <linux/interrupt.h>
44 #include <linux/cramfs_fs.h>
46 #ifdef CONFIG_SQUASHFS
47 #include <linux/squashfs_fs.h>
50 #include <asm/addrspace.h>
51 #include <asm/bootinfo.h>
52 #include <asm-generic/sections.h>
58 /* global PROM environment variables and pointers */
60 char **prom_argv, **prom_envp;
67 struct prom_pmemblock mdesc[PROM_MAX_PMEMBLOCKS];
69 /* default feature sets */
70 static char msp_default_features[] =
71 #if defined(CONFIG_PMC_MSP4200_EVAL) \
72 || defined(CONFIG_PMC_MSP4200_GW)
74 #elif defined(CONFIG_PMC_MSP7120_EVAL) \
75 || defined(CONFIG_PMC_MSP7120_GW)
77 #elif defined(CONFIG_PMC_MSP7120_FPGA)
81 /* conversion functions */
82 static inline unsigned char str2hexnum(unsigned char c)
84 if (c >= '0' && c <= '9')
86 if (c >= 'a' && c <= 'f')
91 static inline int str2eaddr(unsigned char *ea, unsigned char *str)
94 unsigned char num = 0;
96 while (*str != '\0') {
97 if ((*str == '.') || (*str == ':')) {
103 num |= str2hexnum(*str++);
113 EXPORT_SYMBOL(str2eaddr);
115 static inline unsigned long str2hex(unsigned char *str)
121 value |= str2hexnum(*str++);
127 /* function to query the system information */
128 const char *get_system_type(void)
130 #if defined(CONFIG_PMC_MSP4200_EVAL)
131 return "PMC-Sierra MSP4200 Eval Board";
132 #elif defined(CONFIG_PMC_MSP4200_GW)
133 return "PMC-Sierra MSP4200 VoIP Gateway";
134 #elif defined(CONFIG_PMC_MSP7120_EVAL)
135 return "PMC-Sierra MSP7120 Eval Board";
136 #elif defined(CONFIG_PMC_MSP7120_GW)
137 return "PMC-Sierra MSP7120 Residential Gateway";
138 #elif defined(CONFIG_PMC_MSP7120_FPGA)
139 return "PMC-Sierra MSP7120 FPGA";
141 #error "What is the type of *your* MSP?"
145 int get_ethernet_addr(char *ethaddr_name, char *ethernet_addr)
149 ethaddr_str = prom_getenv(ethaddr_name);
151 printk(KERN_WARNING "%s not set in boot prom\n", ethaddr_name);
155 if (str2eaddr(ethernet_addr, ethaddr_str) == -1) {
156 printk(KERN_WARNING "%s badly formatted-<%s>\n",
157 ethaddr_name, ethaddr_str);
161 if (init_debug > 1) {
163 printk(KERN_DEBUG "get_ethernet_addr: for %s ", ethaddr_name);
164 for (i = 0; i < 5; i++)
165 printk(KERN_DEBUG "%02x:",
166 (unsigned char)*(ethernet_addr+i));
167 printk(KERN_DEBUG "%02x\n", *(ethernet_addr+i));
172 EXPORT_SYMBOL(get_ethernet_addr);
174 static char *get_features(void)
176 char *feature = prom_getenv(FEATURES);
178 if (feature == NULL) {
179 /* default features based on MACHINE_TYPE */
180 feature = msp_default_features;
186 static char test_feature(char c)
188 char *feature = get_features();
196 return FEATURE_NOEXIST;
199 unsigned long get_deviceid(void)
201 char *deviceid = prom_getenv(DEVICEID);
203 if (deviceid == NULL)
206 return str2hex(deviceid);
209 char identify_pci(void)
211 return test_feature(PCI_KEY);
213 EXPORT_SYMBOL(identify_pci);
215 char identify_pcimux(void)
217 return test_feature(PCIMUX_KEY);
220 char identify_sec(void)
222 return test_feature(SEC_KEY);
224 EXPORT_SYMBOL(identify_sec);
226 char identify_spad(void)
228 return test_feature(SPAD_KEY);
230 EXPORT_SYMBOL(identify_spad);
232 char identify_tdm(void)
234 return test_feature(TDM_KEY);
236 EXPORT_SYMBOL(identify_tdm);
238 char identify_zsp(void)
240 return test_feature(ZSP_KEY);
242 EXPORT_SYMBOL(identify_zsp);
244 static char identify_enetfeature(char key, unsigned long interface_num)
246 char *feature = get_features();
249 if (*feature++ == key && interface_num-- == 0)
254 return FEATURE_NOEXIST;
257 char identify_enet(unsigned long interface_num)
259 return identify_enetfeature(ENET_KEY, interface_num);
261 EXPORT_SYMBOL(identify_enet);
263 char identify_enetTxD(unsigned long interface_num)
265 return identify_enetfeature(ENETTXD_KEY, interface_num);
267 EXPORT_SYMBOL(identify_enetTxD);
269 unsigned long identify_family(void)
271 unsigned long deviceid;
273 deviceid = get_deviceid();
275 return deviceid & CPU_DEVID_FAMILY;
277 EXPORT_SYMBOL(identify_family);
279 unsigned long identify_revision(void)
281 unsigned long deviceid;
283 deviceid = get_deviceid();
285 return deviceid & CPU_DEVID_REVISION;
287 EXPORT_SYMBOL(identify_revision);
289 /* PROM environment functions */
290 char *prom_getenv(char *env_name)
293 * Return a pointer to the given environment variable. prom_envp
294 * points to a null terminated array of pointers to variables.
295 * Environment variables are stored in the form of "memsize=64"
298 char **var = prom_envp;
299 int i = strlen(env_name);
302 if (strncmp(env_name, *var, i) == 0) {
303 return (*var + strlen(env_name) + 1);
311 /* PROM commandline functions */
312 char *prom_getcmdline(void)
314 return &(arcs_cmdline[0]);
316 EXPORT_SYMBOL(prom_getcmdline);
318 void __init prom_init_cmdline(void)
323 actr = 1; /* Always ignore argv[0] */
325 cp = &(arcs_cmdline[0]);
326 while (actr < prom_argc) {
327 strcpy(cp, prom_argv[actr]);
328 cp += strlen(prom_argv[actr]);
332 if (cp != &(arcs_cmdline[0])) /* get rid of trailing space */
337 /* memory allocation functions */
338 static int __init prom_memtype_classify(unsigned int type)
344 return BOOT_MEM_ROM_DATA;
346 return BOOT_MEM_RESERVED;
350 void __init prom_meminit(void)
352 struct prom_pmemblock *p;
358 unsigned long base, size;
360 type = prom_memtype_classify(p->type);
364 add_memory_region(base, size, type);
369 void __init prom_free_prom_memory(void)
380 * preserve environment variables and command line from pmon/bbload
381 * first preserve the command line
383 for (argc = 0; argc < prom_argc; argc++) {
384 len += sizeof(char *); /* length of pointer */
385 len += strlen(prom_argv[argc]) + 1; /* length of string */
387 len += sizeof(char *); /* plus length of null pointer */
389 argv = kmalloc(len, GFP_KERNEL);
390 ptr = (char *) &argv[prom_argc + 1]; /* strings follow array */
392 for (argc = 0; argc < prom_argc; argc++) {
394 strcpy(ptr, prom_argv[argc]);
395 ptr += strlen(prom_argv[argc]) + 1;
397 argv[prom_argc] = NULL; /* end array with null pointer */
400 /* next preserve the environment variables */
403 for (envp = prom_envp; *envp != NULL; envp++) {
404 i++; /* count number of environment variables */
405 len += sizeof(char *); /* length of pointer */
406 len += strlen(*envp) + 1; /* length of string */
408 len += sizeof(char *); /* plus length of null pointer */
410 envp = kmalloc(len, GFP_KERNEL);
411 ptr = (char *) &envp[i+1];
413 for (argc = 0; argc < i; argc++) {
415 strcpy(ptr, prom_envp[argc]);
416 ptr += strlen(prom_envp[argc]) + 1;
418 envp[i] = NULL; /* end array with null pointer */
421 for (i = 0; i < boot_mem_map.nr_map; i++) {
422 if (boot_mem_map.map[i].type != BOOT_MEM_ROM_DATA)
425 addr = boot_mem_map.map[i].addr;
426 free_init_pages("prom memory",
427 addr, addr + boot_mem_map.map[i].size);
431 struct prom_pmemblock *__init prom_getmdesc(void)
433 static char memsz_env[] __initdata = "memsize";
434 static char heaptop_env[] __initdata = "heaptop";
436 unsigned int memsize;
437 unsigned int heaptop;
438 #ifdef CONFIG_MTD_PMC_MSP_RAMROOT
440 unsigned long ramroot_size;
444 str = prom_getenv(memsz_env);
446 ppfinit("memsize not set in boot prom, "
447 "set to default (32Mb)\n");
448 memsize = 0x02000000;
450 memsize = simple_strtol(str, NULL, 0);
453 /* if memsize is a bad size, use reasonable default */
454 memsize = 0x02000000;
457 /* convert to physical address (removing caching bits, etc) */
458 memsize = CPHYSADDR(memsize);
461 str = prom_getenv(heaptop_env);
463 heaptop = CPHYSADDR((u32)&_text);
464 ppfinit("heaptop not set in boot prom, "
465 "set to default 0x%08x\n", heaptop);
467 heaptop = simple_strtol(str, NULL, 16);
469 /* heaptop conversion bad, might have 0xValue */
470 heaptop = simple_strtol(str, NULL, 0);
473 /* heaptop still bad, use reasonable default */
474 heaptop = CPHYSADDR((u32)&_text);
478 /* convert to physical address (removing caching bits, etc) */
479 heaptop = CPHYSADDR((u32)heaptop);
482 /* the base region */
484 mdesc[i].type = BOOT_MEM_RESERVED;
485 mdesc[i].base = 0x00000000;
486 mdesc[i].size = PAGE_ALIGN(0x300 + 0x80);
487 /* jtag interrupt vector + sizeof vector */
490 if (heaptop > mdesc[i].base + mdesc[i].size) {
492 mdesc[i].type = BOOT_MEM_ROM_DATA;
493 mdesc[i].base = mdesc[i-1].base + mdesc[i-1].size;
494 mdesc[i].size = heaptop - mdesc[i].base;
497 /* end of PMON data to start of kernel -- probably zero .. */
498 if (heaptop != CPHYSADDR((u32)_text)) {
500 mdesc[i].type = BOOT_MEM_RAM;
501 mdesc[i].base = heaptop;
502 mdesc[i].size = CPHYSADDR((u32)_text) - mdesc[i].base;
507 mdesc[i].type = BOOT_MEM_RESERVED;
508 mdesc[i].base = CPHYSADDR((u32)_text);
509 #ifdef CONFIG_MTD_PMC_MSP_RAMROOT
510 if (get_ramroot(&ramroot_start, &ramroot_size)) {
512 * Rootfs in RAM -- follows kernel
513 * Combine rootfs image with kernel block so a
514 * page (4k) isn't wasted between memory blocks
516 mdesc[i].size = CPHYSADDR(PAGE_ALIGN(
517 (u32)ramroot_start + ramroot_size)) - mdesc[i].base;
520 mdesc[i].size = CPHYSADDR(PAGE_ALIGN(
521 (u32)_end)) - mdesc[i].base;
523 /* Remainder of RAM -- under memsize */
525 mdesc[i].type = yamon_free;
526 mdesc[i].base = mdesc[i-1].base + mdesc[i-1].size;
527 mdesc[i].size = memsize - mdesc[i].base;
532 /* rootfs functions */
533 #ifdef CONFIG_MTD_PMC_MSP_RAMROOT
534 bool get_ramroot(void **start, unsigned long *size)
538 /* Check for start following the end of the kernel */
539 void *check_start = (void *)_end;
541 /* Check for supported rootfs types */
543 if (*(__u32 *)check_start == CRAMFS_MAGIC) {
544 /* Get CRAMFS size */
545 *start = check_start;
546 *size = PAGE_ALIGN(((struct cramfs_super *)
552 #ifdef CONFIG_SQUASHFS
553 if (*((unsigned int *)check_start) == SQUASHFS_MAGIC) {
554 /* Get SQUASHFS size */
555 *start = check_start;
556 *size = PAGE_ALIGN(((struct squashfs_super_block *)
557 check_start)->bytes_used);
565 EXPORT_SYMBOL(get_ramroot);