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