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)(irq_handler_t handler) __initdata = NULL;
53 int (*mach_hwclk) (int, struct rtc_time*);
54
55 /* machine dependent reboot functions */
56 void (*mach_reset)(void);
57 void (*mach_halt)(void);
58 void (*mach_power_off)(void);
59
60 #ifdef CONFIG_M68000
61 #if defined(CONFIG_M68328)
62 #define CPU_NAME "MC68328"
63 #elif defined(CONFIG_M68EZ328)
64 #define CPU_NAME "MC68EZ328"
65 #elif defined(CONFIG_M68VZ328)
66 #define CPU_NAME "MC68VZ328"
67 #else
68 #define CPU_NAME "MC68000"
69 #endif
70 #endif /* CONFIG_M68000 */
71 #ifndef CPU_NAME
72 #define CPU_NAME "UNKNOWN"
73 #endif
74
75 /*
76 * Different cores have different instruction execution timings.
77 * The old/traditional 68000 cores are basically all the same, at 16.
78 * The ColdFire cores vary a little, their values are defined in their
79 * headers. We default to the standard 68000 value here.
80 */
81 #ifndef CPU_INSTR_PER_JIFFY
82 #define CPU_INSTR_PER_JIFFY 16
83 #endif
84
setup_arch(char ** cmdline_p)85 void __init setup_arch(char **cmdline_p)
86 {
87 memory_start = PAGE_ALIGN(_ramstart);
88 memory_end = _ramend;
89
90 init_mm.start_code = (unsigned long) &_stext;
91 init_mm.end_code = (unsigned long) &_etext;
92 init_mm.end_data = (unsigned long) &_edata;
93 init_mm.brk = (unsigned long) 0;
94
95 config_BSP(&command_line[0], sizeof(command_line));
96
97 #if defined(CONFIG_BOOTPARAM)
98 strncpy(&command_line[0], CONFIG_BOOTPARAM_STRING, sizeof(command_line));
99 command_line[sizeof(command_line) - 1] = 0;
100 #endif /* CONFIG_BOOTPARAM */
101
102 process_uboot_commandline(&command_line[0], sizeof(command_line));
103
104 pr_info("uClinux with CPU " CPU_NAME "\n");
105
106 #ifdef CONFIG_UCDIMM
107 pr_info("uCdimm by Lineo, Inc. <www.lineo.com>\n");
108 #endif
109 #ifdef CONFIG_M68VZ328
110 pr_info("M68VZ328 support by Evan Stawnyczy <e@lineo.ca>\n");
111 #endif
112 #ifdef CONFIG_COLDFIRE
113 pr_info("COLDFIRE port done by Greg Ungerer, gerg@snapgear.com\n");
114 #ifdef CONFIG_M5307
115 pr_info("Modified for M5307 by Dave Miller, dmiller@intellistor.com\n");
116 #endif
117 #ifdef CONFIG_ELITE
118 pr_info("Modified for M5206eLITE by Rob Scott, rscott@mtrob.fdns.net\n");
119 #endif
120 #endif
121 pr_info("Flat model support (C) 1998,1999 Kenneth Albanowski, D. Jeff Dionne\n");
122
123 #if defined( CONFIG_PILOT ) && defined( CONFIG_M68328 )
124 pr_info("TRG SuperPilot FLASH card support <info@trgnet.com>\n");
125 #endif
126 #if defined( CONFIG_PILOT ) && defined( CONFIG_M68EZ328 )
127 pr_info("PalmV support by Lineo Inc. <jeff@uclinux.com>\n");
128 #endif
129 #ifdef CONFIG_DRAGEN2
130 pr_info("DragonEngine II board support by Georges Menie\n");
131 #endif
132 #ifdef CONFIG_M5235EVB
133 pr_info("Motorola M5235EVB support (C)2005 Syn-tech Systems, Inc. (Jate Sujjavanich)\n");
134 #endif
135
136 pr_debug("KERNEL -> TEXT=0x%p-0x%p DATA=0x%p-0x%p BSS=0x%p-0x%p\n",
137 _stext, _etext, _sdata, _edata, __bss_start, __bss_stop);
138 pr_debug("MEMORY -> ROMFS=0x%p-0x%06lx MEM=0x%06lx-0x%06lx\n ",
139 __bss_stop, memory_start, memory_start, memory_end);
140
141 memblock_add(_rambase, memory_end - _rambase);
142 memblock_reserve(_rambase, memory_start - _rambase);
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 /*
150 * Give all the memory to the bootmap allocator, tell it to put the
151 * boot mem_map at the start of memory.
152 */
153 min_low_pfn = PFN_DOWN(memory_start);
154 max_pfn = max_low_pfn = PFN_DOWN(memory_end);
155
156 #if defined(CONFIG_UBOOT) && defined(CONFIG_BLK_DEV_INITRD)
157 if ((initrd_start > 0) && (initrd_start < initrd_end) &&
158 (initrd_end < memory_end))
159 memblock_reserve(initrd_start, initrd_end - initrd_start);
160 #endif /* if defined(CONFIG_BLK_DEV_INITRD) */
161
162 /*
163 * Get kmalloc into gear.
164 */
165 paging_init();
166 }
167
168 /*
169 * Get CPU information for use by the procfs.
170 */
show_cpuinfo(struct seq_file * m,void * v)171 static int show_cpuinfo(struct seq_file *m, void *v)
172 {
173 char *cpu, *mmu, *fpu;
174 u_long clockfreq;
175
176 cpu = CPU_NAME;
177 mmu = "none";
178 fpu = "none";
179 clockfreq = (loops_per_jiffy * HZ) * CPU_INSTR_PER_JIFFY;
180
181 seq_printf(m, "CPU:\t\t%s\n"
182 "MMU:\t\t%s\n"
183 "FPU:\t\t%s\n"
184 "Clocking:\t%lu.%1luMHz\n"
185 "BogoMips:\t%lu.%02lu\n"
186 "Calibration:\t%lu loops\n",
187 cpu, mmu, fpu,
188 clockfreq / 1000000,
189 (clockfreq / 100000) % 10,
190 (loops_per_jiffy * HZ) / 500000,
191 ((loops_per_jiffy * HZ) / 5000) % 100,
192 (loops_per_jiffy * HZ));
193
194 return 0;
195 }
196
c_start(struct seq_file * m,loff_t * pos)197 static void *c_start(struct seq_file *m, loff_t *pos)
198 {
199 return *pos < NR_CPUS ? ((void *) 0x12345678) : NULL;
200 }
201
c_next(struct seq_file * m,void * v,loff_t * pos)202 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
203 {
204 ++*pos;
205 return c_start(m, pos);
206 }
207
c_stop(struct seq_file * m,void * v)208 static void c_stop(struct seq_file *m, void *v)
209 {
210 }
211
212 const struct seq_operations cpuinfo_op = {
213 .start = c_start,
214 .next = c_next,
215 .stop = c_stop,
216 .show = show_cpuinfo,
217 };
218
219