2 * This program is free software; you can redistribute it and/or modify
3 * it under the terms of the GNU General Public License as published by
4 * the Free Software Foundation; either version 2 of the License, or
5 * (at your option) any later version.
7 * This program is distributed in the hope that it will be useful,
8 * but WITHOUT ANY WARRANTY; without even the implied warranty of
9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10 * GNU General Public License for more details.
12 * You should have received a copy of the GNU General Public License
13 * along with this program; if not, write to the Free Software
14 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
16 * Copyright (C) 2005 Wu Qi Ming infineon
17 * Copyright (C) 2007 John Crispin <blogic@openwrt.org>
20 #include <linux/init.h>
21 #include <linux/module.h>
22 #include <linux/bootmem.h>
23 #include <asm/bootinfo.h>
24 #include <asm/ifxmips/ifxmips.h>
26 static char buf[1024]; /* for prom_printf() */
28 /* for voice cpu (MIPS24K) */
29 unsigned int *prom_cp1_base = NULL;
30 unsigned int prom_cp1_size = 0;
32 /* for Multithreading (APRP) on MIPS34K */
33 unsigned long physical_memsize = 0L;
35 #ifdef IFXMIPS_PROM_ASC0
36 #define IFXMIPS_ASC_DIFF 0
38 #define IFXMIPS_ASC_DIFF IFXMIPS_ASC_BASE_DIFF
41 static inline u32 asc_r32(unsigned long r)
43 return ifxmips_r32((u32 *)(IFXMIPS_ASC_BASE_ADDR + IFXMIPS_ASC_DIFF + r));
46 static inline void asc_w32(u32 v, unsigned long r)
48 ifxmips_w32(v, (u32 *)(IFXMIPS_ASC_BASE_ADDR + IFXMIPS_ASC_DIFF + r));
51 void prom_free_prom_memory(void)
55 void prom_putchar(char c)
59 local_irq_save(flags);
60 while((asc_r32(IFXMIPS_ASC_FSTAT) & ASCFSTAT_TXFFLMASK) >> ASCFSTAT_TXFFLOFF);
63 asc_w32('\r', IFXMIPS_ASC_TBUF);
64 asc_w32(c, IFXMIPS_ASC_TBUF);
65 local_irq_restore(flags);
68 void prom_printf(const char *fmt, ...)
75 l = vsprintf(buf, fmt, args);
79 for (p = buf; p < buf_end; p++)
83 unsigned int *prom_get_cp1_base(void)
87 EXPORT_SYMBOL(prom_get_cp1_base);
89 unsigned int prom_get_cp1_size(void)
91 /* return size im MB */
92 return prom_cp1_size>>20;
94 EXPORT_SYMBOL(prom_get_cp1_size);
96 void __init prom_init(void)
99 char **argv = (char **) fw_arg1;
100 char **envp = (char **) fw_arg2;
102 int memsize = 16; /* assume 16M as default */
105 mips_machtype = MACH_INFINEON_IFXMIPS;
108 argv = (char**)KSEG1ADDR((unsigned long)argv);
109 arcs_cmdline[0] = '\0';
110 for (i = 1; i < argc; i++)
112 char *a = (char *)KSEG1ADDR(argv[i]);
115 /* for voice cpu on Twinpass/Danube */
116 if (cpu_data[0].cputype == CPU_24K)
117 if (!strncmp(a, "cp1_size=", 9)) {
118 prom_cp1_size = memparse(a + 9, &a);
121 if (strlen(arcs_cmdline) + strlen(a + 1) >= sizeof(arcs_cmdline)) {
122 prom_printf("cmdline overflow, skipping: %s\n", a);
125 strcat(arcs_cmdline, a);
126 strcat(arcs_cmdline, " ");
129 strcpy(&(arcs_cmdline[0]),
130 "console=ttyS0,115200 rootfstype=squashfs,jffs2 init=/etc/preinit");
132 envp = (char**)KSEG1ADDR((unsigned long)envp);
135 char *e = (char *)KSEG1ADDR(*envp);
137 if (!strncmp(e, "memsize=", 8))
140 memsize = simple_strtoul(e, NULL, 10);
145 memsize *= 1024 * 1024;
147 /* only on Twinpass/Danube a second CPU is used for Voice */
148 if ((cpu_data[0].cputype == CPU_24K) && (prom_cp1_size)) {
149 memsize -= prom_cp1_size;
150 prom_cp1_base = (unsigned int*)KSEG1ADDR(memsize);
152 prom_printf("Using %dMB Ram and reserving %dMB for cp1\n",
153 memsize>>20, prom_cp1_size>>20);
156 add_memory_region(0x00000000, memsize, BOOT_MEM_RAM);