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1/*
2 * linux/arch/m68knommu/kernel/setup.c
3 *
4 * Copyright (C) 1999-2007 Greg Ungerer (gerg@snapgear.com)
5 * Copyright (C) 1998,1999 D. Jeff Dionne <jeff@uClinux.org>
6 * Copyleft ()) 2000 James D. Schettine {james@telos-systems.com}
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 * 68VZ328 Fixes/support Evan Stawnyczy <e@lineo.ca>
13 */
14
15/*
16 * This file handles the architecture-dependent parts of system setup
17 */
18
19#include <linux/kernel.h>
20#include <linux/sched.h>
21#include <linux/delay.h>
22#include <linux/interrupt.h>
23#include <linux/fb.h>
24#include <linux/module.h>
25#include <linux/mm.h>
26#include <linux/console.h>
27#include <linux/errno.h>
28#include <linux/string.h>
29#include <linux/bootmem.h>
30#include <linux/seq_file.h>
31#include <linux/init.h>
32#include <linux/initrd.h>
33#include <linux/root_dev.h>
34
35#include <asm/setup.h>
36#include <asm/irq.h>
37#include <asm/machdep.h>
38#include <asm/pgtable.h>
39
40unsigned long memory_start;
41unsigned long memory_end;
42
43EXPORT_SYMBOL(memory_start);
44EXPORT_SYMBOL(memory_end);
45
46char __initdata command_line[COMMAND_LINE_SIZE];
47
48/* machine dependent timer functions */
49void (*mach_gettod)(int*, int*, int*, int*, int*, int*);
50int (*mach_set_clock_mmss)(unsigned long);
51
52/* machine dependent reboot functions */
53void (*mach_reset)(void);
54void (*mach_halt)(void);
55void (*mach_power_off)(void);
56
57#ifdef CONFIG_M68328
58#define CPU_NAME "MC68328"
59#endif
60#ifdef CONFIG_M68EZ328
61#define CPU_NAME "MC68EZ328"
62#endif
63#ifdef CONFIG_M68VZ328
64#define CPU_NAME "MC68VZ328"
65#endif
66#ifdef CONFIG_M68360
67#define CPU_NAME "MC68360"
68#endif
69#ifndef CPU_NAME
70#define CPU_NAME "UNKNOWN"
71#endif
72
73/*
74 * Different cores have different instruction execution timings.
75 * The old/traditional 68000 cores are basically all the same, at 16.
76 * The ColdFire cores vary a little, their values are defined in their
77 * headers. We default to the standard 68000 value here.
78 */
79#ifndef CPU_INSTR_PER_JIFFY
80#define CPU_INSTR_PER_JIFFY 16
81#endif
82
83extern int _stext, _etext, _sdata, _edata, _sbss, _ebss, _end;
84extern int _ramstart, _ramend;
85
86#if defined(CONFIG_UBOOT)
87/*
88 * parse_uboot_commandline
89 *
90 * Copies u-boot commandline arguments and store them in the proper linux
91 * variables.
92 *
93 * Assumes:
94 * _init_sp global contains the address in the stack pointer when the
95 * kernel starts (see head.S::_start)
96 *
97 * U-Boot calling convention:
98 * (*kernel) (kbd, initrd_start, initrd_end, cmd_start, cmd_end);
99 *
100 * _init_sp can be parsed as such
101 *
102 * _init_sp+00 = u-boot cmd after jsr into kernel (skip)
103 * _init_sp+04 = &kernel board_info (residual data)
104 * _init_sp+08 = &initrd_start
105 * _init_sp+12 = &initrd_end
106 * _init_sp+16 = &cmd_start
107 * _init_sp+20 = &cmd_end
108 *
109 * This also assumes that the memory locations pointed to are still
110 * unmodified. U-boot places them near the end of external SDRAM.
111 *
112 * Argument(s):
113 * commandp = the linux commandline arg container to fill.
114 * size = the sizeof commandp.
115 *
116 * Returns:
117 */
118void parse_uboot_commandline(char *commandp, int size)
119{
120 extern unsigned long _init_sp;
121 unsigned long *sp;
122 unsigned long uboot_kbd;
123 unsigned long uboot_initrd_start, uboot_initrd_end;
124 unsigned long uboot_cmd_start, uboot_cmd_end;
125
126
127 sp = (unsigned long *)_init_sp;
128 uboot_kbd = sp[1];
129 uboot_initrd_start = sp[2];
130 uboot_initrd_end = sp[3];
131 uboot_cmd_start = sp[4];
132 uboot_cmd_end = sp[5];
133
134 if (uboot_cmd_start && uboot_cmd_end)
135 strncpy(commandp, (const char *)uboot_cmd_start, size);
136#if defined(CONFIG_BLK_DEV_INITRD)
137 if (uboot_initrd_start && uboot_initrd_end &&
138 (uboot_initrd_end > uboot_initrd_start)) {
139 initrd_start = uboot_initrd_start;
140 initrd_end = uboot_initrd_end;
141 ROOT_DEV = Root_RAM0;
142 printk(KERN_INFO "initrd at 0x%lx:0x%lx\n",
143 initrd_start, initrd_end);
144 }
145#endif /* if defined(CONFIG_BLK_DEV_INITRD) */
146}
147#endif /* #if defined(CONFIG_UBOOT) */
148
149void __init setup_arch(char **cmdline_p)
150{
151 int bootmap_size;
152
153 memory_start = PAGE_ALIGN(_ramstart);
154 memory_end = _ramend;
155
156 init_mm.start_code = (unsigned long) &_stext;
157 init_mm.end_code = (unsigned long) &_etext;
158 init_mm.end_data = (unsigned long) &_edata;
159 init_mm.brk = (unsigned long) 0;
160
161 config_BSP(&command_line[0], sizeof(command_line));
162
163#if defined(CONFIG_BOOTPARAM)
164 strncpy(&command_line[0], CONFIG_BOOTPARAM_STRING, sizeof(command_line));
165 command_line[sizeof(command_line) - 1] = 0;
166#endif /* CONFIG_BOOTPARAM */
167
168#if defined(CONFIG_UBOOT)
169 /* CONFIG_UBOOT and CONFIG_BOOTPARAM defined, concatenate cmdline */
170 #if defined(CONFIG_BOOTPARAM)
171 /* Add the whitespace separator */
172 command_line[strlen(CONFIG_BOOTPARAM_STRING)] = ' ';
173 /* Parse uboot command line into the rest of the buffer */
174 parse_uboot_commandline(
175 &command_line[(strlen(CONFIG_BOOTPARAM_STRING)+1)],
176 (sizeof(command_line) -
177 (strlen(CONFIG_BOOTPARAM_STRING)+1)));
178 /* Only CONFIG_UBOOT defined, create cmdline */
179 #else
180 parse_uboot_commandline(&command_line[0], sizeof(command_line));
181 #endif /* CONFIG_BOOTPARAM */
182 command_line[sizeof(command_line) - 1] = 0;
183#endif /* CONFIG_UBOOT */
184
185 printk(KERN_INFO "\x0F\r\n\nuClinux/" CPU_NAME "\n");
186
187#ifdef CONFIG_UCDIMM
188 printk(KERN_INFO "uCdimm by Lineo, Inc. <www.lineo.com>\n");
189#endif
190#ifdef CONFIG_M68VZ328
191 printk(KERN_INFO "M68VZ328 support by Evan Stawnyczy <e@lineo.ca>\n");
192#endif
193#ifdef CONFIG_COLDFIRE
194 printk(KERN_INFO "COLDFIRE port done by Greg Ungerer, gerg@snapgear.com\n");
195#ifdef CONFIG_M5307
196 printk(KERN_INFO "Modified for M5307 by Dave Miller, dmiller@intellistor.com\n");
197#endif
198#ifdef CONFIG_ELITE
199 printk(KERN_INFO "Modified for M5206eLITE by Rob Scott, rscott@mtrob.fdns.net\n");
200#endif
201#endif
202 printk(KERN_INFO "Flat model support (C) 1998,1999 Kenneth Albanowski, D. Jeff Dionne\n");
203
204#if defined( CONFIG_PILOT ) && defined( CONFIG_M68328 )
205 printk(KERN_INFO "TRG SuperPilot FLASH card support <info@trgnet.com>\n");
206#endif
207#if defined( CONFIG_PILOT ) && defined( CONFIG_M68EZ328 )
208 printk(KERN_INFO "PalmV support by Lineo Inc. <jeff@uclinux.com>\n");
209#endif
210#if defined (CONFIG_M68360)
211 printk(KERN_INFO "QUICC port done by SED Systems <hamilton@sedsystems.ca>,\n");
212 printk(KERN_INFO "based on 2.0.38 port by Lineo Inc. <mleslie@lineo.com>.\n");
213#endif
214#ifdef CONFIG_DRAGEN2
215 printk(KERN_INFO "DragonEngine II board support by Georges Menie\n");
216#endif
217#ifdef CONFIG_M5235EVB
218 printk(KERN_INFO "Motorola M5235EVB support (C)2005 Syn-tech Systems, Inc. (Jate Sujjavanich)\n");
219#endif
220
221 pr_debug("KERNEL -> TEXT=0x%06x-0x%06x DATA=0x%06x-0x%06x "
222 "BSS=0x%06x-0x%06x\n", (int) &_stext, (int) &_etext,
223 (int) &_sdata, (int) &_edata,
224 (int) &_sbss, (int) &_ebss);
225 pr_debug("MEMORY -> ROMFS=0x%06x-0x%06x MEM=0x%06x-0x%06x\n ",
226 (int) &_ebss, (int) memory_start,
227 (int) memory_start, (int) memory_end);
228
229 /* Keep a copy of command line */
230 *cmdline_p = &command_line[0];
231 memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE);
232 boot_command_line[COMMAND_LINE_SIZE-1] = 0;
233
234#if defined(CONFIG_FRAMEBUFFER_CONSOLE) && defined(CONFIG_DUMMY_CONSOLE)
235 conswitchp = &dummy_con;
236#endif
237
238 /*
239 * Give all the memory to the bootmap allocator, tell it to put the
240 * boot mem_map at the start of memory.
241 */
242 bootmap_size = init_bootmem_node(
243 NODE_DATA(0),
244 memory_start >> PAGE_SHIFT, /* map goes here */
245 PAGE_OFFSET >> PAGE_SHIFT, /* 0 on coldfire */
246 memory_end >> PAGE_SHIFT);
247 /*
248 * Free the usable memory, we have to make sure we do not free
249 * the bootmem bitmap so we then reserve it after freeing it :-)
250 */
251 free_bootmem(memory_start, memory_end - memory_start);
252 reserve_bootmem(memory_start, bootmap_size, BOOTMEM_DEFAULT);
253
254#if defined(CONFIG_UBOOT) && defined(CONFIG_BLK_DEV_INITRD)
255 if ((initrd_start > 0) && (initrd_start < initrd_end) &&
256 (initrd_end < memory_end))
257 reserve_bootmem(initrd_start, initrd_end - initrd_start,
258 BOOTMEM_DEFAULT);
259#endif /* if defined(CONFIG_BLK_DEV_INITRD) */
260
261 /*
262 * Get kmalloc into gear.
263 */
264 paging_init();
265}
266
267/*
268 * Get CPU information for use by the procfs.
269 */
270static int show_cpuinfo(struct seq_file *m, void *v)
271{
272 char *cpu, *mmu, *fpu;
273 u_long clockfreq;
274
275 cpu = CPU_NAME;
276 mmu = "none";
277 fpu = "none";
278 clockfreq = (loops_per_jiffy * HZ) * CPU_INSTR_PER_JIFFY;
279
280 seq_printf(m, "CPU:\t\t%s\n"
281 "MMU:\t\t%s\n"
282 "FPU:\t\t%s\n"
283 "Clocking:\t%lu.%1luMHz\n"
284 "BogoMips:\t%lu.%02lu\n"
285 "Calibration:\t%lu loops\n",
286 cpu, mmu, fpu,
287 clockfreq / 1000000,
288 (clockfreq / 100000) % 10,
289 (loops_per_jiffy * HZ) / 500000,
290 ((loops_per_jiffy * HZ) / 5000) % 100,
291 (loops_per_jiffy * HZ));
292
293 return 0;
294}
295
296static void *c_start(struct seq_file *m, loff_t *pos)
297{
298 return *pos < NR_CPUS ? ((void *) 0x12345678) : NULL;
299}
300
301static void *c_next(struct seq_file *m, void *v, loff_t *pos)
302{
303 ++*pos;
304 return c_start(m, pos);
305}
306
307static void c_stop(struct seq_file *m, void *v)
308{
309}
310
311const struct seq_operations cpuinfo_op = {
312 .start = c_start,
313 .next = c_next,
314 .stop = c_stop,
315 .show = show_cpuinfo,
316};
317
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