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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * linux/arch/m68knommu/kernel/setup.c
4 *
5 * Copyright (C) 1999-2007 Greg Ungerer ([email protected])
6 * Copyright (C) 1998,1999 D. Jeff Dionne <[email protected]>
7 * Copyleft ()) 2000 James D. Schettine {[email protected]}
8 * Copyright (C) 1998 Kenneth Albanowski <[email protected]>
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 <[email protected]>
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/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/memblock.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/sections.h>
41
42unsigned long memory_start;
43unsigned long memory_end;
44
45EXPORT_SYMBOL(memory_start);
46EXPORT_SYMBOL(memory_end);
47
48char __initdata command_line[COMMAND_LINE_SIZE];
49
50/* machine dependent timer functions */
51void (*mach_sched_init)(void) __initdata = NULL;
52
53/* machine dependent reboot functions */
54void (*mach_reset)(void);
55void (*mach_halt)(void);
56
57#ifdef CONFIG_M68000
58#if defined(CONFIG_M68328)
59#define CPU_NAME "MC68328"
60#elif defined(CONFIG_M68EZ328)
61#define CPU_NAME "MC68EZ328"
62#elif defined(CONFIG_M68VZ328)
63#define CPU_NAME "MC68VZ328"
64#else
65#define CPU_NAME "MC68000"
66#endif
67#endif /* CONFIG_M68000 */
68#ifndef CPU_NAME
69#define CPU_NAME "UNKNOWN"
70#endif
71
72/*
73 * Different cores have different instruction execution timings.
74 * The old/traditional 68000 cores are basically all the same, at 16.
75 * The ColdFire cores vary a little, their values are defined in their
76 * headers. We default to the standard 68000 value here.
77 */
78#ifndef CPU_INSTR_PER_JIFFY
79#define CPU_INSTR_PER_JIFFY 16
80#endif
81
82void __init setup_arch(char **cmdline_p)
83{
84 memory_start = PAGE_ALIGN(_ramstart);
85 memory_end = _ramend;
86
87 setup_initial_init_mm(_stext, _etext, _edata, NULL);
88
89 config_BSP(&command_line[0], sizeof(command_line));
90
91#if defined(CONFIG_BOOTPARAM)
92 strscpy(&command_line[0], CONFIG_BOOTPARAM_STRING, sizeof(command_line));
93#endif /* CONFIG_BOOTPARAM */
94
95 process_uboot_commandline(&command_line[0], sizeof(command_line));
96
97 pr_info("uClinux with CPU " CPU_NAME "\n");
98
99#ifdef CONFIG_UCDIMM
100 pr_info("uCdimm by Lineo, Inc. <www.lineo.com>\n");
101#endif
102#ifdef CONFIG_M68328
103 pr_info("68328 support D. Jeff Dionne <[email protected]>\n");
104 pr_info("68328 support Kenneth Albanowski <[email protected]>\n");
105#endif
106#ifdef CONFIG_M68EZ328
107 pr_info("68EZ328 DragonBallEZ support (C) 1999 Rt-Control, Inc\n");
108#endif
109#ifdef CONFIG_M68VZ328
110 pr_info("M68VZ328 support by Evan Stawnyczy <[email protected]>\n");
111 pr_info("68VZ328 DragonBallVZ support (c) 2001 Lineo, Inc.\n");
112#endif
113#ifdef CONFIG_COLDFIRE
114 pr_info("COLDFIRE port done by Greg Ungerer, [email protected]\n");
115#ifdef CONFIG_M5307
116 pr_info("Modified for M5307 by Dave Miller, [email protected]\n");
117#endif
118#ifdef CONFIG_ELITE
119 pr_info("Modified for M5206eLITE by Rob Scott, [email protected]\n");
120#endif
121#endif
122 pr_info("Flat model support (C) 1998,1999 Kenneth Albanowski, D. Jeff Dionne\n");
123
124#if defined( CONFIG_PILOT ) && defined( CONFIG_M68328 )
125 pr_info("68328/Pilot support Bernhard Kuhn <[email protected]>\n");
126 pr_info("TRG SuperPilot FLASH card support <[email protected]>\n");
127#endif
128#if defined( CONFIG_PILOT ) && defined( CONFIG_M68EZ328 )
129 pr_info("PalmV support by Lineo Inc. <[email protected]>\n");
130#endif
131#ifdef CONFIG_DRAGEN2
132 pr_info("DragonEngine II board support by Georges Menie\n");
133#endif
134#ifdef CONFIG_M5235EVB
135 pr_info("Motorola M5235EVB support (C)2005 Syn-tech Systems, Inc. (Jate Sujjavanich)\n");
136#endif
137
138 pr_debug("KERNEL -> TEXT=0x%p-0x%p DATA=0x%p-0x%p BSS=0x%p-0x%p\n",
139 _stext, _etext, _sdata, _edata, __bss_start, __bss_stop);
140 pr_debug("MEMORY -> ROMFS=0x%p-0x%06lx MEM=0x%06lx-0x%06lx\n",
141 __bss_stop, memory_start, memory_start, memory_end);
142
143 memblock_add(_rambase, memory_end - _rambase);
144 memblock_reserve(_rambase, memory_start - _rambase);
145
146 /* Keep a copy of command line */
147 *cmdline_p = &command_line[0];
148 strscpy(boot_command_line, command_line, COMMAND_LINE_SIZE);
149
150 /*
151 * Give all the memory to the bootmap allocator, tell it to put the
152 * boot mem_map at the start of memory.
153 */
154 min_low_pfn = PFN_DOWN(memory_start);
155 max_pfn = max_low_pfn = PFN_DOWN(memory_end);
156
157#if defined(CONFIG_UBOOT) && defined(CONFIG_BLK_DEV_INITRD)
158 if ((initrd_start > 0) && (initrd_start < initrd_end) &&
159 (initrd_end < memory_end))
160 memblock_reserve(initrd_start, initrd_end - initrd_start);
161#endif /* if defined(CONFIG_BLK_DEV_INITRD) */
162
163 /*
164 * Get kmalloc into gear.
165 */
166 paging_init();
167}
168
169/*
170 * Get CPU information for use by the procfs.
171 */
172static int show_cpuinfo(struct seq_file *m, void *v)
173{
174 char *cpu, *mmu, *fpu;
175 u_long clockfreq;
176
177 cpu = CPU_NAME;
178 mmu = "none";
179 fpu = "none";
180 clockfreq = (loops_per_jiffy * HZ) * CPU_INSTR_PER_JIFFY;
181
182 seq_printf(m, "CPU:\t\t%s\n"
183 "MMU:\t\t%s\n"
184 "FPU:\t\t%s\n"
185 "Clocking:\t%lu.%1luMHz\n"
186 "BogoMips:\t%lu.%02lu\n"
187 "Calibration:\t%lu loops\n",
188 cpu, mmu, fpu,
189 clockfreq / 1000000,
190 (clockfreq / 100000) % 10,
191 (loops_per_jiffy * HZ) / 500000,
192 ((loops_per_jiffy * HZ) / 5000) % 100,
193 (loops_per_jiffy * HZ));
194
195 return 0;
196}
197
198static void *c_start(struct seq_file *m, loff_t *pos)
199{
200 return *pos < NR_CPUS ? ((void *) 0x12345678) : NULL;
201}
202
203static void *c_next(struct seq_file *m, void *v, loff_t *pos)
204{
205 ++*pos;
206 return c_start(m, pos);
207}
208
209static void c_stop(struct seq_file *m, void *v)
210{
211}
212
213const struct seq_operations cpuinfo_op = {
214 .start = c_start,
215 .next = c_next,
216 .stop = c_stop,
217 .show = show_cpuinfo,
218};
219