2 * Big Endian PROM code for SNI RM machines
4 * This file is subject to the terms and conditions of the GNU General Public
5 * License. See the file "COPYING" in the main directory of this archive
8 * Copyright (C) 2005-2006 Florian Lohoff (flo@rfc822.org)
9 * Copyright (C) 2005-2006 Thomas Bogendoerfer (tsbogend@alpha.franken.de)
14 #include <linux/kernel.h>
15 #include <linux/init.h>
16 #include <linux/string.h>
17 #include <linux/console.h>
19 #include <asm/addrspace.h>
21 #include <asm/mipsprom.h>
22 #include <asm/mipsregs.h>
23 #include <asm/bootinfo.h>
25 /* special SNI prom calls */
27 * This does not exist in all proms - SINIX compares
28 * the prom env variable "version" against "2.0008"
29 * or greater. If lesser it tries to probe interesting
32 #define PROM_GET_MEMCONF 58
34 #define PROM_VEC (u64 *)CKSEG1ADDR(0x1fc00000)
35 #define PROM_ENTRY(x) (PROM_VEC + (x))
38 static int *(*__prom_putchar)(int) = (int *(*)(int))PROM_ENTRY(PROM_PUTCHAR);
40 void prom_putchar(char c)
45 static char *(*__prom_getenv)(char *) = (char *(*)(char *))PROM_ENTRY(PROM_GETENV);
46 static void (*__prom_get_memconf)(void *) = (void (*)(void *))PROM_ENTRY(PROM_GET_MEMCONF);
48 char *prom_getenv (char *s)
50 return __prom_getenv(s);
53 void __init prom_free_prom_memory(void)
58 * /proc/cpuinfo system type
61 static const char *systype = "Unknown";
62 const char *get_system_type(void)
67 #define SNI_IDPROM_BASE 0xbff00000
68 #define SNI_IDPROM_MEMSIZE (SNI_IDPROM_BASE+0x28) /* Memsize in 16MB quantities */
69 #define SNI_IDPROM_BRDTYPE (SNI_IDPROM_BASE+0x29) /* Board Type */
70 #define SNI_IDPROM_CPUTYPE (SNI_IDPROM_BASE+0x30) /* CPU Type */
72 #define SNI_IDPROM_SIZE 0x1000
75 static void __init sni_idprom_dump(void)
79 pr_debug("SNI IDProm dump:\n");
80 for (i = 0; i < 256; i++) {
84 printk("%02x ", *(unsigned char *) (SNI_IDPROM_BASE + i));
92 static void __init sni_mem_init(void )
103 /* MemSIZE from prom in 16MByte chunks */
104 memsize = *((unsigned char *) SNI_IDPROM_MEMSIZE) * 16;
106 pr_debug("IDProm memsize: %lu MByte\n", memsize);
108 /* get memory bank layout from prom */
109 __prom_get_memconf(&memconf);
111 pr_debug("prom_get_mem_conf memory configuration:\n");
112 for (i = 0;i < 8 && memconf[i].size; i++) {
113 if (sni_brd_type == SNI_BRD_PCI_TOWER ||
114 sni_brd_type == SNI_BRD_PCI_TOWER_CPLUS) {
115 if (memconf[i].base >= 0x20000000 &&
116 memconf[i].base < 0x30000000) {
117 memconf[i].base -= 0x20000000;
120 pr_debug("Bank%d: %08x @ %08x\n", i,
121 memconf[i].size, memconf[i].base);
122 add_memory_region(memconf[i].base, memconf[i].size, BOOT_MEM_RAM);
126 static void __init sni_console_setup(void)
132 static char options[8];
134 cdev = prom_getenv ("console_dev");
135 if (strncmp (cdev, "tty", 3) == 0) {
136 ctype = prom_getenv ("console");
141 baud = prom_getenv("lbaud");
145 baud = prom_getenv("rbaud");
149 strcpy(options, baud);
150 if (strncmp (cdev, "tty552", 6) == 0)
151 add_preferred_console("ttyS", port, baud ? options : NULL);
153 add_preferred_console("ttySC", port, baud ? options : NULL);
157 void __init prom_init(void)
160 char **argv = (void *)fw_arg1;
164 sni_brd_type = *(unsigned char *)SNI_IDPROM_BRDTYPE;
165 cputype = *(unsigned char *)SNI_IDPROM_CPUTYPE;
166 switch (sni_brd_type) {
167 case SNI_BRD_TOWER_OASIC:
170 systype = "RM400-330";
173 systype = "RM400-430";
176 systype = "RM400-530";
179 systype = "RM400-730";
182 systype = "RM400-xxx";
186 case SNI_BRD_MINITOWER:
190 systype = "RM400-120";
193 systype = "RM400-220";
196 systype = "RM400-225";
199 systype = "RM400-420";
202 systype = "RM400-xxx";
206 case SNI_BRD_PCI_TOWER:
207 systype = "RM400-Cxx";
210 systype = "RM200-xxx";
212 case SNI_BRD_PCI_MTOWER:
213 systype = "RM300-Cxx";
215 case SNI_BRD_PCI_DESKTOP:
216 switch (read_c0_prid() & 0xff00) {
219 systype = "RM200-C20";
222 systype = "RM200-C40";
225 systype = "RM200-Cxx";
229 case SNI_BRD_PCI_TOWER_CPLUS:
230 systype = "RM400-Exx";
232 case SNI_BRD_PCI_MTOWER_CPLUS:
233 systype = "RM300-Exx";
236 pr_debug("Found SNI brdtype %02x name %s\n", sni_brd_type,systype);
244 /* copy prom cmdline parameters to kernel cmdline */
245 for (i = 1; i < argc; i++) {
246 strcat(arcs_cmdline, argv[i]);
248 strcat(arcs_cmdline, " ");