Commit | Line | Data |
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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> | |
27ac792c | 23 | #include <linux/mm.h> |
1da177e4 LT |
24 | #include <linux/fs.h> |
25 | #include <linux/fb.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> | |
34 | ||
35 | #include <asm/setup.h> | |
36 | #include <asm/irq.h> | |
1da177e4 | 37 | #include <asm/pgtable.h> |
436814e6 | 38 | #include <asm/sections.h> |
1da177e4 LT |
39 | |
40 | #if defined(__H8300H__) | |
41 | #define CPU "H8/300H" | |
42 | #include <asm/regs306x.h> | |
43 | #endif | |
44 | ||
45 | #if defined(__H8300S__) | |
46 | #define CPU "H8S" | |
47 | #include <asm/regs267x.h> | |
48 | #endif | |
49 | ||
497888cf | 50 | #define STUBSIZE 0xc000 |
1da177e4 LT |
51 | |
52 | unsigned long rom_length; | |
53 | unsigned long memory_start; | |
54 | unsigned long memory_end; | |
55 | ||
5ff62590 | 56 | char __initdata command_line[COMMAND_LINE_SIZE]; |
1da177e4 | 57 | |
1da177e4 LT |
58 | extern int _ramstart, _ramend; |
59 | extern char _target_name[]; | |
60 | extern void h8300_gpio_init(void); | |
61 | ||
62 | #if (defined(CONFIG_H8300H_SIM) || defined(CONFIG_H8S_SIM)) \ | |
63 | && defined(CONFIG_GDB_MAGICPRINT) | |
64 | /* printk with gdb service */ | |
65 | static void gdb_console_output(struct console *c, const char *msg, unsigned len) | |
66 | { | |
67 | for (; len > 0; len--) { | |
68 | asm("mov.w %0,r2\n\t" | |
69 | "jsr @0xc4"::"r"(*msg++):"er2"); | |
70 | } | |
71 | } | |
72 | ||
73 | /* | |
74 | * Setup initial baud/bits/parity. We do two things here: | |
75 | * - construct a cflag setting for the first rs_open() | |
76 | * - initialize the serial port | |
77 | * Return non-zero if we didn't find a serial port. | |
78 | */ | |
79 | static int __init gdb_console_setup(struct console *co, char *options) | |
80 | { | |
81 | return 0; | |
82 | } | |
83 | ||
84 | static const struct console gdb_console = { | |
85 | .name = "gdb_con", | |
86 | .write = gdb_console_output, | |
87 | .device = NULL, | |
88 | .setup = gdb_console_setup, | |
89 | .flags = CON_PRINTBUFFER, | |
90 | .index = -1, | |
91 | }; | |
92 | #endif | |
93 | ||
94 | void __init setup_arch(char **cmdline_p) | |
95 | { | |
96 | int bootmap_size; | |
97 | ||
98 | memory_start = (unsigned long) &_ramstart; | |
99 | ||
100 | /* allow for ROMFS on the end of the kernel */ | |
101 | if (memcmp((void *)memory_start, "-rom1fs-", 8) == 0) { | |
102 | #if defined(CONFIG_BLK_DEV_INITRD) | |
103 | initrd_start = memory_start; | |
104 | initrd_end = memory_start += be32_to_cpu(((unsigned long *) (memory_start))[2]); | |
105 | #else | |
106 | memory_start += be32_to_cpu(((unsigned long *) memory_start)[2]); | |
107 | #endif | |
108 | } | |
109 | memory_start = PAGE_ALIGN(memory_start); | |
110 | #if !defined(CONFIG_BLKDEV_RESERVE) | |
111 | memory_end = (unsigned long) &_ramend; /* by now the stack is part of the init task */ | |
112 | #if defined(CONFIG_GDB_DEBUG) | |
113 | memory_end -= STUBSIZE; | |
114 | #endif | |
115 | #else | |
116 | if ((memory_end < CONFIG_BLKDEV_RESERVE_ADDRESS) && | |
3869aa29 | 117 | (memory_end > CONFIG_BLKDEV_RESERVE_ADDRESS)) |
1da177e4 LT |
118 | /* overlap userarea */ |
119 | memory_end = CONFIG_BLKDEV_RESERVE_ADDRESS; | |
120 | #endif | |
121 | ||
436814e6 GU |
122 | init_mm.start_code = (unsigned long) _stext; |
123 | init_mm.end_code = (unsigned long) _etext; | |
124 | init_mm.end_data = (unsigned long) _edata; | |
1da177e4 LT |
125 | init_mm.brk = (unsigned long) 0; |
126 | ||
127 | #if (defined(CONFIG_H8300H_SIM) || defined(CONFIG_H8S_SIM)) && defined(CONFIG_GDB_MAGICPRINT) | |
128 | register_console((struct console *)&gdb_console); | |
129 | #endif | |
130 | ||
131 | printk(KERN_INFO "\r\n\nuClinux " CPU "\n"); | |
132 | printk(KERN_INFO "Target Hardware: %s\n",_target_name); | |
133 | printk(KERN_INFO "Flat model support (C) 1998,1999 Kenneth Albanowski, D. Jeff Dionne\n"); | |
134 | printk(KERN_INFO "H8/300 series support by Yoshinori Sato <ysato@users.sourceforge.jp>\n"); | |
135 | ||
136 | #ifdef DEBUG | |
436814e6 GU |
137 | printk(KERN_DEBUG "KERNEL -> TEXT=0x%p-0x%p DATA=0x%p-0x%p " |
138 | "BSS=0x%p-0x%p\n", _stext, _etext, _sdata, _edata, __bss_start, | |
139 | __bss_stop); | |
140 | printk(KERN_DEBUG "KERNEL -> ROMFS=0x%p-0x%06lx MEM=0x%06lx-0x%06lx " | |
141 | "STACK=0x%06lx-0x%p\n", __bss_stop, memory_start, memory_start, | |
142 | memory_end, memory_end, &_ramend); | |
1da177e4 LT |
143 | #endif |
144 | ||
145 | #ifdef CONFIG_DEFAULT_CMDLINE | |
146 | /* set from default command line */ | |
147 | if (*command_line == '\0') | |
148 | strcpy(command_line,CONFIG_KERNEL_COMMAND); | |
149 | #endif | |
150 | /* Keep a copy of command line */ | |
151 | *cmdline_p = &command_line[0]; | |
5ff62590 ABL |
152 | memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE); |
153 | boot_command_line[COMMAND_LINE_SIZE-1] = 0; | |
1da177e4 LT |
154 | |
155 | #ifdef DEBUG | |
156 | if (strlen(*cmdline_p)) | |
157 | printk(KERN_DEBUG "Command line: '%s'\n", *cmdline_p); | |
158 | #endif | |
159 | ||
160 | /* | |
161 | * give all the memory to the bootmap allocator, tell it to put the | |
162 | * boot mem_map at the start of memory | |
163 | */ | |
164 | bootmap_size = init_bootmem_node( | |
165 | NODE_DATA(0), | |
166 | memory_start >> PAGE_SHIFT, /* map goes here */ | |
167 | PAGE_OFFSET >> PAGE_SHIFT, /* 0 on coldfire */ | |
168 | memory_end >> PAGE_SHIFT); | |
169 | /* | |
170 | * free the usable memory, we have to make sure we do not free | |
171 | * the bootmem bitmap so we then reserve it after freeing it :-) | |
172 | */ | |
173 | free_bootmem(memory_start, memory_end - memory_start); | |
72a7fe39 | 174 | reserve_bootmem(memory_start, bootmap_size, BOOTMEM_DEFAULT); |
1da177e4 LT |
175 | /* |
176 | * get kmalloc into gear | |
177 | */ | |
178 | paging_init(); | |
179 | h8300_gpio_init(); | |
180 | #if defined(CONFIG_H8300_AKI3068NET) && defined(CONFIG_IDE) | |
181 | { | |
182 | #define AREABIT(addr) (1 << (((addr) >> 21) & 7)) | |
183 | /* setup BSC */ | |
184 | volatile unsigned char *abwcr = (volatile unsigned char *)ABWCR; | |
185 | volatile unsigned char *cscr = (volatile unsigned char *)CSCR; | |
186 | *abwcr &= ~(AREABIT(CONFIG_H8300_IDE_BASE) | AREABIT(CONFIG_H8300_IDE_ALT)); | |
187 | *cscr |= (AREABIT(CONFIG_H8300_IDE_BASE) | AREABIT(CONFIG_H8300_IDE_ALT)) | 0x0f; | |
188 | } | |
189 | #endif | |
190 | #ifdef DEBUG | |
191 | printk(KERN_DEBUG "Done setup_arch\n"); | |
192 | #endif | |
193 | } | |
194 | ||
195 | /* | |
196 | * Get CPU information for use by the procfs. | |
197 | */ | |
198 | ||
199 | static int show_cpuinfo(struct seq_file *m, void *v) | |
200 | { | |
201 | char *cpu; | |
202 | int mode; | |
203 | u_long clockfreq; | |
204 | ||
205 | cpu = CPU; | |
206 | mode = *(volatile unsigned char *)MDCR & 0x07; | |
207 | ||
208 | clockfreq = CONFIG_CPU_CLOCK; | |
209 | ||
210 | seq_printf(m, "CPU:\t\t%s (mode:%d)\n" | |
211 | "Clock:\t\t%lu.%1luMHz\n" | |
212 | "BogoMips:\t%lu.%02lu\n" | |
213 | "Calibration:\t%lu loops\n", | |
214 | cpu,mode, | |
215 | clockfreq/1000,clockfreq%1000, | |
216 | (loops_per_jiffy*HZ)/500000,((loops_per_jiffy*HZ)/5000)%100, | |
217 | (loops_per_jiffy*HZ)); | |
218 | ||
219 | return 0; | |
220 | } | |
221 | ||
222 | static void *c_start(struct seq_file *m, loff_t *pos) | |
223 | { | |
224 | return *pos < NR_CPUS ? ((void *) 0x12345678) : NULL; | |
225 | } | |
226 | ||
227 | static void *c_next(struct seq_file *m, void *v, loff_t *pos) | |
228 | { | |
229 | ++*pos; | |
230 | return c_start(m, pos); | |
231 | } | |
232 | ||
233 | static void c_stop(struct seq_file *m, void *v) | |
234 | { | |
235 | } | |
236 | ||
03a44825 | 237 | const struct seq_operations cpuinfo_op = { |
1da177e4 LT |
238 | .start = c_start, |
239 | .next = c_next, | |
240 | .stop = c_stop, | |
241 | .show = show_cpuinfo, | |
242 | }; |