2 * linux/arch/h8300/kernel/setup.c
4 * Copyleft ()) 2000 James D. Schettine {james@telos-systems.com}
5 * Copyright (C) 1999,2000 Greg Ungerer (gerg@snapgear.com)
6 * Copyright (C) 1998,1999 D. Jeff Dionne <jeff@lineo.ca>
7 * Copyright (C) 1998 Kenneth Albanowski <kjahds@kjahds.com>
8 * Copyright (C) 1995 Hamish Macdonald
9 * Copyright (C) 2000 Lineo Inc. (www.lineo.com)
10 * Copyright (C) 2001 Lineo, Inc. <www.lineo.com>
12 * H8/300 porting Yoshinori Sato <ysato@users.sourceforge.jp>
16 * This file handles the architecture-dependent parts of system setup
19 #include <linux/kernel.h>
20 #include <linux/sched.h>
21 #include <linux/delay.h>
22 #include <linux/interrupt.h>
26 #include <linux/console.h>
27 #include <linux/genhd.h>
28 #include <linux/errno.h>
29 #include <linux/string.h>
30 #include <linux/major.h>
31 #include <linux/bootmem.h>
32 #include <linux/seq_file.h>
33 #include <linux/init.h>
35 #include <asm/setup.h>
37 #include <asm/pgtable.h>
39 #if defined(__H8300H__)
41 #include <asm/regs306x.h>
44 #if defined(__H8300S__)
46 #include <asm/regs267x.h>
49 #define STUBSIZE 0xc000
51 unsigned long rom_length;
52 unsigned long memory_start;
53 unsigned long memory_end;
55 char __initdata command_line[COMMAND_LINE_SIZE];
57 extern int _stext, _etext, _sdata, _edata, _sbss, _ebss, _end;
58 extern unsigned long _ramstart, _ramend;
59 extern char _target_name[];
60 void h8300_early_devices_register(void);
62 void __init setup_arch(char **cmdline_p)
66 memory_start = (unsigned long) &_ramstart;
68 /* allow for ROMFS on the end of the kernel */
69 if (memcmp((void *)memory_start, "-rom1fs-", 8) == 0) {
70 #if defined(CONFIG_BLK_DEV_INITRD)
71 initrd_start = memory_start;
72 initrd_end = memory_start += be32_to_cpu(((unsigned long *) (memory_start))[2]);
74 memory_start += be32_to_cpu(((unsigned long *) memory_start)[2]);
77 memory_start = PAGE_ALIGN(memory_start);
78 #if !defined(CONFIG_BLKDEV_RESERVE)
79 memory_end = (unsigned long) &_ramend; /* by now the stack is part of the init task */
80 #if defined(CONFIG_GDB_DEBUG)
81 memory_end -= STUBSIZE;
84 if ((memory_end < CONFIG_BLKDEV_RESERVE_ADDRESS) &&
85 (memory_end > CONFIG_BLKDEV_RESERVE_ADDRESS))
86 /* overlap userarea */
87 memory_end = CONFIG_BLKDEV_RESERVE_ADDRESS;
90 init_mm.start_code = (unsigned long) &_stext;
91 init_mm.end_code = (unsigned long) &_etext;
92 init_mm.end_data = (unsigned long) &_edata;
93 init_mm.brk = (unsigned long) 0;
95 printk(KERN_INFO "\r\n\nuClinux " CPU "\n");
96 printk(KERN_INFO "Target Hardware: %s\n",_target_name);
97 printk(KERN_INFO "Flat model support (C) 1998,1999 Kenneth Albanowski, D. Jeff Dionne\n");
98 printk(KERN_INFO "H8/300 series support by Yoshinori Sato <ysato@users.sourceforge.jp>\n");
101 printk(KERN_DEBUG "KERNEL -> TEXT=0x%06x-0x%06x DATA=0x%06x-0x%06x "
102 "BSS=0x%06x-0x%06x\n", (int) &_stext, (int) &_etext,
103 (int) &_sdata, (int) &_edata,
104 (int) &_sbss, (int) &_ebss);
105 printk(KERN_DEBUG "KERNEL -> ROMFS=0x%06x-0x%06x MEM=0x%06x-0x%06x "
106 "STACK=0x%06x-0x%06x\n",
107 (int) &_ebss, (int) memory_start,
108 (int) memory_start, (int) memory_end,
109 (int) memory_end, (int) &_ramend);
112 #ifdef CONFIG_DEFAULT_CMDLINE
113 /* set from default command line */
114 if (*command_start == '\0')
115 memcpy(command_line, CONFIG_KERNEL_COMMAND, sizeof(command_line));
117 if (*command_line == '\0')
118 memcpy(command_line, command_start, sizeof(command_line));
119 *cmdline_p = command_line;
120 memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE);
121 boot_command_line[COMMAND_LINE_SIZE-1] = 0;
124 if (strlen(*cmdline_p))
125 printk(KERN_DEBUG "Command line: '%s'\n", *cmdline_p);
129 * give all the memory to the bootmap allocator, tell it to put the
130 * boot mem_map at the start of memory
132 bootmap_size = init_bootmem_node(
134 memory_start >> PAGE_SHIFT, /* map goes here */
135 PAGE_OFFSET >> PAGE_SHIFT, /* 0 on coldfire */
136 memory_end >> PAGE_SHIFT);
138 * free the usable memory, we have to make sure we do not free
139 * the bootmem bitmap so we then reserve it after freeing it :-)
141 free_bootmem(memory_start, memory_end - memory_start);
142 reserve_bootmem(memory_start, bootmap_size, BOOTMEM_DEFAULT);
144 * get kmalloc into gear
147 h8300_early_devices_register();
149 printk(KERN_DEBUG "Done setup_arch\n");
154 * Get CPU information for use by the procfs.
157 static int show_cpuinfo(struct seq_file *m, void *v)
164 mode = *(volatile unsigned char *)MDCR & 0x07;
166 clockfreq = CONFIG_CPU_CLOCK;
168 seq_printf(m, "CPU:\t\t%s (mode:%d)\n"
169 "Clock:\t\t%lu.%1luMHz\n"
170 "BogoMips:\t%lu.%02lu\n"
171 "Calibration:\t%lu loops\n",
173 clockfreq/1000,clockfreq%1000,
174 (loops_per_jiffy*HZ)/500000,((loops_per_jiffy*HZ)/5000)%100,
175 (loops_per_jiffy*HZ));
180 static void *c_start(struct seq_file *m, loff_t *pos)
182 return *pos < NR_CPUS ? ((void *) 0x12345678) : NULL;
185 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
188 return c_start(m, pos);
191 static void c_stop(struct seq_file *m, void *v)
195 const struct seq_operations cpuinfo_op = {
199 .show = show_cpuinfo,