xref: /linux/arch/m68k/kernel/setup_no.c (revision c411ed854584a71b0e86ac3019b60e4789d88086)
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 #include <linux/rtc.h>
35 
36 #include <asm/setup.h>
37 #include <asm/bootinfo.h>
38 #include <asm/irq.h>
39 #include <asm/machdep.h>
40 #include <asm/pgtable.h>
41 #include <asm/sections.h>
42 
43 unsigned long memory_start;
44 unsigned long memory_end;
45 
46 EXPORT_SYMBOL(memory_start);
47 EXPORT_SYMBOL(memory_end);
48 
49 char __initdata command_line[COMMAND_LINE_SIZE];
50 
51 /* machine dependent timer functions */
52 void (*mach_sched_init)(irq_handler_t handler) __initdata = NULL;
53 int (*mach_set_clock_mmss)(unsigned long);
54 int (*mach_hwclk) (int, struct rtc_time*);
55 
56 /* machine dependent reboot functions */
57 void (*mach_reset)(void);
58 void (*mach_halt)(void);
59 void (*mach_power_off)(void);
60 
61 #ifdef CONFIG_M68000
62 #if defined(CONFIG_M68328)
63 #define CPU_NAME	"MC68328"
64 #elif defined(CONFIG_M68EZ328)
65 #define CPU_NAME	"MC68EZ328"
66 #elif defined(CONFIG_M68VZ328)
67 #define CPU_NAME	"MC68VZ328"
68 #else
69 #define CPU_NAME	"MC68000"
70 #endif
71 #endif /* CONFIG_M68000 */
72 #ifndef CPU_NAME
73 #define	CPU_NAME	"UNKNOWN"
74 #endif
75 
76 /*
77  * Different cores have different instruction execution timings.
78  * The old/traditional 68000 cores are basically all the same, at 16.
79  * The ColdFire cores vary a little, their values are defined in their
80  * headers. We default to the standard 68000 value here.
81  */
82 #ifndef CPU_INSTR_PER_JIFFY
83 #define	CPU_INSTR_PER_JIFFY	16
84 #endif
85 
86 void __init setup_arch(char **cmdline_p)
87 {
88 	int bootmap_size;
89 
90 	memory_start = PAGE_ALIGN(_ramstart);
91 	memory_end = _ramend;
92 
93 	init_mm.start_code = (unsigned long) &_stext;
94 	init_mm.end_code = (unsigned long) &_etext;
95 	init_mm.end_data = (unsigned long) &_edata;
96 	init_mm.brk = (unsigned long) 0;
97 
98 	config_BSP(&command_line[0], sizeof(command_line));
99 
100 #if defined(CONFIG_BOOTPARAM)
101 	strncpy(&command_line[0], CONFIG_BOOTPARAM_STRING, sizeof(command_line));
102 	command_line[sizeof(command_line) - 1] = 0;
103 #endif /* CONFIG_BOOTPARAM */
104 
105 	process_uboot_commandline(&command_line[0], sizeof(command_line));
106 
107 	pr_info("uClinux with CPU " CPU_NAME "\n");
108 
109 #ifdef CONFIG_UCDIMM
110 	pr_info("uCdimm by Lineo, Inc. <www.lineo.com>\n");
111 #endif
112 #ifdef CONFIG_M68VZ328
113 	pr_info("M68VZ328 support by Evan Stawnyczy <e@lineo.ca>\n");
114 #endif
115 #ifdef CONFIG_COLDFIRE
116 	pr_info("COLDFIRE port done by Greg Ungerer, gerg@snapgear.com\n");
117 #ifdef CONFIG_M5307
118 	pr_info("Modified for M5307 by Dave Miller, dmiller@intellistor.com\n");
119 #endif
120 #ifdef CONFIG_ELITE
121 	pr_info("Modified for M5206eLITE by Rob Scott, rscott@mtrob.fdns.net\n");
122 #endif
123 #endif
124 	pr_info("Flat model support (C) 1998,1999 Kenneth Albanowski, D. Jeff Dionne\n");
125 
126 #if defined( CONFIG_PILOT ) && defined( CONFIG_M68328 )
127 	pr_info("TRG SuperPilot FLASH card support <info@trgnet.com>\n");
128 #endif
129 #if defined( CONFIG_PILOT ) && defined( CONFIG_M68EZ328 )
130 	pr_info("PalmV support by Lineo Inc. <jeff@uclinux.com>\n");
131 #endif
132 #ifdef CONFIG_DRAGEN2
133 	pr_info("DragonEngine II board support by Georges Menie\n");
134 #endif
135 #ifdef CONFIG_M5235EVB
136 	pr_info("Motorola M5235EVB support (C)2005 Syn-tech Systems, Inc. (Jate Sujjavanich)\n");
137 #endif
138 
139 	pr_debug("KERNEL -> TEXT=0x%p-0x%p DATA=0x%p-0x%p BSS=0x%p-0x%p\n",
140 		 _stext, _etext, _sdata, _edata, __bss_start, __bss_stop);
141 	pr_debug("MEMORY -> ROMFS=0x%p-0x%06lx MEM=0x%06lx-0x%06lx\n ",
142 		 __bss_stop, memory_start, memory_start, memory_end);
143 
144 	/* Keep a copy of command line */
145 	*cmdline_p = &command_line[0];
146 	memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE);
147 	boot_command_line[COMMAND_LINE_SIZE-1] = 0;
148 
149 #if defined(CONFIG_FRAMEBUFFER_CONSOLE) && defined(CONFIG_DUMMY_CONSOLE)
150 	conswitchp = &dummy_con;
151 #endif
152 
153 	/*
154 	 * Give all the memory to the bootmap allocator, tell it to put the
155 	 * boot mem_map at the start of memory.
156 	 */
157 	min_low_pfn = PFN_DOWN(memory_start);
158 	max_pfn = max_low_pfn = PFN_DOWN(memory_end);
159 
160 	bootmap_size = init_bootmem_node(
161 			NODE_DATA(0),
162 			min_low_pfn,		/* map goes here */
163 			PFN_DOWN(PAGE_OFFSET),
164 			max_pfn);
165 	/*
166 	 * Free the usable memory, we have to make sure we do not free
167 	 * the bootmem bitmap so we then reserve it after freeing it :-)
168 	 */
169 	free_bootmem(memory_start, memory_end - memory_start);
170 	reserve_bootmem(memory_start, bootmap_size, BOOTMEM_DEFAULT);
171 
172 #if defined(CONFIG_UBOOT) && defined(CONFIG_BLK_DEV_INITRD)
173 	if ((initrd_start > 0) && (initrd_start < initrd_end) &&
174 			(initrd_end < memory_end))
175 		reserve_bootmem(initrd_start, initrd_end - initrd_start,
176 				 BOOTMEM_DEFAULT);
177 #endif /* if defined(CONFIG_BLK_DEV_INITRD) */
178 
179 	/*
180 	 * Get kmalloc into gear.
181 	 */
182 	paging_init();
183 }
184 
185 /*
186  *	Get CPU information for use by the procfs.
187  */
188 static int show_cpuinfo(struct seq_file *m, void *v)
189 {
190 	char *cpu, *mmu, *fpu;
191 	u_long clockfreq;
192 
193 	cpu = CPU_NAME;
194 	mmu = "none";
195 	fpu = "none";
196 	clockfreq = (loops_per_jiffy * HZ) * CPU_INSTR_PER_JIFFY;
197 
198 	seq_printf(m, "CPU:\t\t%s\n"
199 		      "MMU:\t\t%s\n"
200 		      "FPU:\t\t%s\n"
201 		      "Clocking:\t%lu.%1luMHz\n"
202 		      "BogoMips:\t%lu.%02lu\n"
203 		      "Calibration:\t%lu loops\n",
204 		      cpu, mmu, fpu,
205 		      clockfreq / 1000000,
206 		      (clockfreq / 100000) % 10,
207 		      (loops_per_jiffy * HZ) / 500000,
208 		      ((loops_per_jiffy * HZ) / 5000) % 100,
209 		      (loops_per_jiffy * HZ));
210 
211 	return 0;
212 }
213 
214 static void *c_start(struct seq_file *m, loff_t *pos)
215 {
216 	return *pos < NR_CPUS ? ((void *) 0x12345678) : NULL;
217 }
218 
219 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
220 {
221 	++*pos;
222 	return c_start(m, pos);
223 }
224 
225 static void c_stop(struct seq_file *m, void *v)
226 {
227 }
228 
229 const struct seq_operations cpuinfo_op = {
230 	.start	= c_start,
231 	.next	= c_next,
232 	.stop	= c_stop,
233 	.show	= show_cpuinfo,
234 };
235 
236