1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * linux/arch/m68knommu/kernel/setup.c
4 *
5 * Copyright (C) 1999-2007 Greg Ungerer (gerg@snapgear.com)
6 * Copyright (C) 1998,1999 D. Jeff Dionne <jeff@uClinux.org>
7 * Copyleft ()) 2000 James D. Schettine {james@telos-systems.com}
8 * Copyright (C) 1998 Kenneth Albanowski <kjahds@kjahds.com>
9 * Copyright (C) 1995 Hamish Macdonald
10 * Copyright (C) 2000 Lineo Inc. (www.lineo.com)
11 * Copyright (C) 2001 Lineo, Inc. <www.lineo.com>
12 *
13 * 68VZ328 Fixes/support Evan Stawnyczy <e@lineo.ca>
14 */
15
16 /*
17 * This file handles the architecture-dependent parts of system setup
18 */
19
20 #include <linux/kernel.h>
21 #include <linux/sched.h>
22 #include <linux/delay.h>
23 #include <linux/interrupt.h>
24 #include <linux/fb.h>
25 #include <linux/module.h>
26 #include <linux/mm.h>
27 #include <linux/console.h>
28 #include <linux/errno.h>
29 #include <linux/string.h>
30 #include <linux/memblock.h>
31 #include <linux/seq_file.h>
32 #include <linux/init.h>
33 #include <linux/initrd.h>
34 #include <linux/root_dev.h>
35 #include <linux/rtc.h>
36
37 #include <asm/setup.h>
38 #include <asm/bootinfo.h>
39 #include <asm/irq.h>
40 #include <asm/machdep.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)(void) __initdata = NULL;
53
54 /* machine dependent reboot functions */
55 void (*mach_reset)(void);
56 void (*mach_halt)(void);
57
58 #ifdef CONFIG_M68000
59 #if defined(CONFIG_M68328)
60 #define CPU_NAME "MC68328"
61 #elif defined(CONFIG_M68EZ328)
62 #define CPU_NAME "MC68EZ328"
63 #elif defined(CONFIG_M68VZ328)
64 #define CPU_NAME "MC68VZ328"
65 #else
66 #define CPU_NAME "MC68000"
67 #endif
68 #endif /* CONFIG_M68000 */
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 void __init setup_arch(char **cmdline_p)
84 {
85 memory_start = PAGE_ALIGN(_ramstart);
86 memory_end = _ramend;
87
88 setup_initial_init_mm(_stext, _etext, _edata, NULL);
89
90 config_BSP(&command_line[0], sizeof(command_line));
91
92 #if defined(CONFIG_BOOTPARAM)
93 strscpy(&command_line[0], CONFIG_BOOTPARAM_STRING, sizeof(command_line));
94 #endif /* CONFIG_BOOTPARAM */
95
96 process_uboot_commandline(&command_line[0], sizeof(command_line));
97
98 pr_info("uClinux with CPU " CPU_NAME "\n");
99
100 #ifdef CONFIG_UCDIMM
101 pr_info("uCdimm by Lineo, Inc. <www.lineo.com>\n");
102 #endif
103 #ifdef CONFIG_M68328
104 pr_info("68328 support D. Jeff Dionne <jeff@uclinux.org>\n");
105 pr_info("68328 support Kenneth Albanowski <kjahds@kjshds.com>\n");
106 #endif
107 #ifdef CONFIG_M68EZ328
108 pr_info("68EZ328 DragonBallEZ support (C) 1999 Rt-Control, Inc\n");
109 #endif
110 #ifdef CONFIG_M68VZ328
111 pr_info("M68VZ328 support by Evan Stawnyczy <e@lineo.ca>\n");
112 pr_info("68VZ328 DragonBallVZ support (c) 2001 Lineo, Inc.\n");
113 #endif
114 #ifdef CONFIG_COLDFIRE
115 pr_info("COLDFIRE port done by Greg Ungerer, gerg@snapgear.com\n");
116 #ifdef CONFIG_M5307
117 pr_info("Modified for M5307 by Dave Miller, dmiller@intellistor.com\n");
118 #endif
119 #ifdef CONFIG_ELITE
120 pr_info("Modified for M5206eLITE by Rob Scott, rscott@mtrob.fdns.net\n");
121 #endif
122 #endif
123 pr_info("Flat model support (C) 1998,1999 Kenneth Albanowski, D. Jeff Dionne\n");
124
125 #if defined( CONFIG_PILOT ) && defined( CONFIG_M68328 )
126 pr_info("68328/Pilot support Bernhard Kuhn <kuhn@lpr.e-technik.tu-muenchen.de>\n");
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 memblock_add(_rambase, memory_end - _rambase);
145 memblock_reserve(_rambase, memory_start - _rambase);
146
147 /* Keep a copy of command line */
148 *cmdline_p = &command_line[0];
149 memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE);
150 boot_command_line[COMMAND_LINE_SIZE-1] = 0;
151
152 /*
153 * Give all the memory to the bootmap allocator, tell it to put the
154 * boot mem_map at the start of memory.
155 */
156 min_low_pfn = PFN_DOWN(memory_start);
157 max_pfn = max_low_pfn = PFN_DOWN(memory_end);
158
159 #if defined(CONFIG_UBOOT) && defined(CONFIG_BLK_DEV_INITRD)
160 if ((initrd_start > 0) && (initrd_start < initrd_end) &&
161 (initrd_end < memory_end))
162 memblock_reserve(initrd_start, initrd_end - initrd_start);
163 #endif /* if defined(CONFIG_BLK_DEV_INITRD) */
164
165 /*
166 * Get kmalloc into gear.
167 */
168 paging_init();
169 }
170
171 /*
172 * Get CPU information for use by the procfs.
173 */
174 static int show_cpuinfo(struct seq_file *m, void *v)
175 {
176 char *cpu, *mmu, *fpu;
177 u_long clockfreq;
178
179 cpu = CPU_NAME;
180 mmu = "none";
181 fpu = "none";
182 clockfreq = (loops_per_jiffy * HZ) * CPU_INSTR_PER_JIFFY;
183
184 seq_printf(m, "CPU:\t\t%s\n"
185 "MMU:\t\t%s\n"
186 "FPU:\t\t%s\n"
187 "Clocking:\t%lu.%1luMHz\n"
188 "BogoMips:\t%lu.%02lu\n"
189 "Calibration:\t%lu loops\n",
190 cpu, mmu, fpu,
191 clockfreq / 1000000,
192 (clockfreq / 100000) % 10,
193 (loops_per_jiffy * HZ) / 500000,
194 ((loops_per_jiffy * HZ) / 5000) % 100,
195 (loops_per_jiffy * HZ));
196
197 return 0;
198 }
199
200 static void *c_start(struct seq_file *m, loff_t *pos)
201 {
202 return *pos < NR_CPUS ? ((void *) 0x12345678) : NULL;
203 }
204
205 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
206 {
207 ++*pos;
208 return c_start(m, pos);
209 }
210
211 static void c_stop(struct seq_file *m, void *v)
212 {
213 }
214
215 const struct seq_operations cpuinfo_op = {
216 .start = c_start,
217 .next = c_next,
218 .stop = c_stop,
219 .show = show_cpuinfo,
220 };
221
222
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