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Merge master.kernel.org:/pub/scm/linux/kernel/git/davej/cpufreq
[linux-2.6-block.git] / arch / h8300 / kernel / setup.c
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1da177e4
LT		 1/*
2 * linux/arch/h8300/kernel/setup.c
3 *
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>
11 *
12 * H8/300 porting Yoshinori Sato <ysato@users.sourceforge.jp>
13 */
14
15/*
16 * This file handles the architecture-dependent parts of system setup
17 */
18
1da177e4
LT		 19#include <linux/kernel.h>
20#include <linux/sched.h>
21#include <linux/delay.h>
22#include <linux/interrupt.h>
23#include <linux/fs.h>
24#include <linux/fb.h>
25#include <linux/console.h>
26#include <linux/genhd.h>
27#include <linux/errno.h>
28#include <linux/string.h>
29#include <linux/major.h>
30#include <linux/bootmem.h>
31#include <linux/seq_file.h>
32#include <linux/init.h>
33
34#include <asm/setup.h>
35#include <asm/irq.h>
36
37#ifdef CONFIG_BLK_DEV_INITRD
38#include <asm/pgtable.h>
39#endif
40
41#if defined(__H8300H__)
42#define CPU "H8/300H"
43#include <asm/regs306x.h>
44#endif
45
46#if defined(__H8300S__)
47#define CPU "H8S"
48#include <asm/regs267x.h>
49#endif
50
51#define STUBSIZE 0xc000;
52
53unsigned long rom_length;
54unsigned long memory_start;
55unsigned long memory_end;
56
57char command_line[COMMAND_LINE_SIZE];
58
59extern int _stext, _etext, _sdata, _edata, _sbss, _ebss, _end;
60extern int _ramstart, _ramend;
61extern char _target_name[];
62extern void h8300_gpio_init(void);
63
64#if (defined(CONFIG_H8300H_SIM) || defined(CONFIG_H8S_SIM)) \
65 && defined(CONFIG_GDB_MAGICPRINT)
66/* printk with gdb service */
67static void gdb_console_output(struct console *c, const char *msg, unsigned len)
68{
69 for (; len > 0; len--) {
70 asm("mov.w %0,r2\n\t"
71 "jsr @0xc4"::"r"(*msg++):"er2");
72 }
73}
74
75/*
76 * Setup initial baud/bits/parity. We do two things here:
77 * - construct a cflag setting for the first rs_open()
78 * - initialize the serial port
79 * Return non-zero if we didn't find a serial port.
80 */
81static int __init gdb_console_setup(struct console *co, char *options)
82{
83 return 0;
84}
85
86static const struct console gdb_console = {
87 .name = "gdb_con",
88 .write = gdb_console_output,
89 .device = NULL,
90 .setup = gdb_console_setup,
91 .flags = CON_PRINTBUFFER,
92 .index = -1,
93};
94#endif
95
96void __init setup_arch(char **cmdline_p)
97{
98 int bootmap_size;
99
100 memory_start = (unsigned long) &_ramstart;
101
102 /* allow for ROMFS on the end of the kernel */
103 if (memcmp((void *)memory_start, "-rom1fs-", 8) == 0) {
104#if defined(CONFIG_BLK_DEV_INITRD)
105 initrd_start = memory_start;
106 initrd_end = memory_start += be32_to_cpu(((unsigned long *) (memory_start))[2]);
107#else
108 memory_start += be32_to_cpu(((unsigned long *) memory_start)[2]);
109#endif
110 }
111 memory_start = PAGE_ALIGN(memory_start);
112#if !defined(CONFIG_BLKDEV_RESERVE)
113 memory_end = (unsigned long) &_ramend; /* by now the stack is part of the init task */
114#if defined(CONFIG_GDB_DEBUG)
115 memory_end -= STUBSIZE;
116#endif
117#else
118 if ((memory_end < CONFIG_BLKDEV_RESERVE_ADDRESS) &&
119 (memory_end > CONFIG_BLKDEV_RESERVE_ADDRESS)
120 /* overlap userarea */
121 memory_end = CONFIG_BLKDEV_RESERVE_ADDRESS;
122#endif
123
124 init_mm.start_code = (unsigned long) &_stext;
125 init_mm.end_code = (unsigned long) &_etext;
126 init_mm.end_data = (unsigned long) &_edata;
127 init_mm.brk = (unsigned long) 0;
128
129#if (defined(CONFIG_H8300H_SIM) || defined(CONFIG_H8S_SIM)) && defined(CONFIG_GDB_MAGICPRINT)
130 register_console((struct console *)&gdb_console);
131#endif
132
133 printk(KERN_INFO "\r\n\nuClinux " CPU "\n");
134 printk(KERN_INFO "Target Hardware: %s\n",_target_name);
135 printk(KERN_INFO "Flat model support (C) 1998,1999 Kenneth Albanowski, D. Jeff Dionne\n");
136 printk(KERN_INFO "H8/300 series support by Yoshinori Sato <ysato@users.sourceforge.jp>\n");
137
138#ifdef DEBUG
139 printk(KERN_DEBUG "KERNEL -> TEXT=0x%06x-0x%06x DATA=0x%06x-0x%06x "
140 "BSS=0x%06x-0x%06x\n", (int) &_stext, (int) &_etext,
141 (int) &_sdata, (int) &_edata,
142 (int) &_sbss, (int) &_ebss);
143 printk(KERN_DEBUG "KERNEL -> ROMFS=0x%06x-0x%06x MEM=0x%06x-0x%06x "
144 "STACK=0x%06x-0x%06x\n",
145 (int) &_ebss, (int) memory_start,
146 (int) memory_start, (int) memory_end,
147 (int) memory_end, (int) &_ramend);
148#endif
149
150#ifdef CONFIG_DEFAULT_CMDLINE
151 /* set from default command line */
152 if (*command_line == '\0')
153 strcpy(command_line,CONFIG_KERNEL_COMMAND);
154#endif
155 /* Keep a copy of command line */
156 *cmdline_p = &command_line[0];
157 memcpy(saved_command_line, command_line, COMMAND_LINE_SIZE);
158 saved_command_line[COMMAND_LINE_SIZE-1] = 0;
159
160#ifdef DEBUG
161 if (strlen(*cmdline_p))
162 printk(KERN_DEBUG "Command line: '%s'\n", *cmdline_p);
163#endif
164
165 /*
166 * give all the memory to the bootmap allocator, tell it to put the
167 * boot mem_map at the start of memory
168 */
169 bootmap_size = init_bootmem_node(
170 NODE_DATA(0),
171 memory_start >> PAGE_SHIFT, /* map goes here */
172 PAGE_OFFSET >> PAGE_SHIFT, /* 0 on coldfire */
173 memory_end >> PAGE_SHIFT);
174 /*
175 * free the usable memory, we have to make sure we do not free
176 * the bootmem bitmap so we then reserve it after freeing it :-)
177 */
178 free_bootmem(memory_start, memory_end - memory_start);
179 reserve_bootmem(memory_start, bootmap_size);
180 /*
181 * get kmalloc into gear
182 */
183 paging_init();
184 h8300_gpio_init();
185#if defined(CONFIG_H8300_AKI3068NET) && defined(CONFIG_IDE)
186 {
187#define AREABIT(addr) (1 << (((addr) >> 21) & 7))
188 /* setup BSC */
189 volatile unsigned char *abwcr = (volatile unsigned char *)ABWCR;
190 volatile unsigned char *cscr = (volatile unsigned char *)CSCR;
191 *abwcr &= ~(AREABIT(CONFIG_H8300_IDE_BASE) | AREABIT(CONFIG_H8300_IDE_ALT));
192 *cscr |= (AREABIT(CONFIG_H8300_IDE_BASE) | AREABIT(CONFIG_H8300_IDE_ALT)) | 0x0f;
193 }
194#endif
195#ifdef DEBUG
196 printk(KERN_DEBUG "Done setup_arch\n");
197#endif
198}
199
200/*
201 * Get CPU information for use by the procfs.
202 */
203
204static int show_cpuinfo(struct seq_file *m, void *v)
205{
206 char *cpu;
207 int mode;
208 u_long clockfreq;
209
210 cpu = CPU;
211 mode = *(volatile unsigned char *)MDCR & 0x07;
212
213 clockfreq = CONFIG_CPU_CLOCK;
214
215 seq_printf(m, "CPU:\t\t%s (mode:%d)\n"
216 "Clock:\t\t%lu.%1luMHz\n"
217 "BogoMips:\t%lu.%02lu\n"
218 "Calibration:\t%lu loops\n",
219 cpu,mode,
220 clockfreq/1000,clockfreq%1000,
221 (loops_per_jiffy*HZ)/500000,((loops_per_jiffy*HZ)/5000)%100,
222 (loops_per_jiffy*HZ));
223
224 return 0;
225}
226
227static void *c_start(struct seq_file *m, loff_t *pos)
228{
229 return *pos < NR_CPUS ? ((void *) 0x12345678) : NULL;
230}
231
232static void *c_next(struct seq_file *m, void *v, loff_t *pos)
233{
234 ++*pos;
235 return c_start(m, pos);
236}
237
238static void c_stop(struct seq_file *m, void *v)
239{
240}
241
242struct seq_operations cpuinfo_op = {
243 .start = c_start,
244 .next = c_next,
245 .stop = c_stop,
246 .show = show_cpuinfo,
247};
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