1 // SPDX-License-Identifier: GPL-2.0
3 * linux/arch/m68knommu/kernel/setup.c
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>
13 * 68VZ328 Fixes/support Evan Stawnyczy <e@lineo.ca>
17 * This file handles the architecture-dependent parts of system setup
20 #include <linux/kernel.h>
21 #include <linux/sched.h>
22 #include <linux/delay.h>
23 #include <linux/interrupt.h>
25 #include <linux/module.h>
27 #include <linux/console.h>
28 #include <linux/errno.h>
29 #include <linux/string.h>
30 #include <linux/bootmem.h>
31 #include <linux/memblock.h>
32 #include <linux/seq_file.h>
33 #include <linux/init.h>
34 #include <linux/initrd.h>
35 #include <linux/root_dev.h>
36 #include <linux/rtc.h>
38 #include <asm/setup.h>
39 #include <asm/bootinfo.h>
41 #include <asm/machdep.h>
42 #include <asm/pgtable.h>
43 #include <asm/sections.h>
45 unsigned long memory_start;
46 unsigned long memory_end;
48 EXPORT_SYMBOL(memory_start);
49 EXPORT_SYMBOL(memory_end);
51 char __initdata command_line[COMMAND_LINE_SIZE];
53 /* machine dependent timer functions */
54 void (*mach_sched_init)(irq_handler_t handler) __initdata = NULL;
55 int (*mach_hwclk) (int, struct rtc_time*);
57 /* machine dependent reboot functions */
58 void (*mach_reset)(void);
59 void (*mach_halt)(void);
60 void (*mach_power_off)(void);
63 #if defined(CONFIG_M68328)
64 #define CPU_NAME "MC68328"
65 #elif defined(CONFIG_M68EZ328)
66 #define CPU_NAME "MC68EZ328"
67 #elif defined(CONFIG_M68VZ328)
68 #define CPU_NAME "MC68VZ328"
70 #define CPU_NAME "MC68000"
72 #endif /* CONFIG_M68000 */
74 #define CPU_NAME "UNKNOWN"
78 * Different cores have different instruction execution timings.
79 * The old/traditional 68000 cores are basically all the same, at 16.
80 * The ColdFire cores vary a little, their values are defined in their
81 * headers. We default to the standard 68000 value here.
83 #ifndef CPU_INSTR_PER_JIFFY
84 #define CPU_INSTR_PER_JIFFY 16
87 void __init setup_arch(char **cmdline_p)
89 memory_start = PAGE_ALIGN(_ramstart);
92 init_mm.start_code = (unsigned long) &_stext;
93 init_mm.end_code = (unsigned long) &_etext;
94 init_mm.end_data = (unsigned long) &_edata;
95 init_mm.brk = (unsigned long) 0;
97 config_BSP(&command_line[0], sizeof(command_line));
99 #if defined(CONFIG_BOOTPARAM)
100 strncpy(&command_line[0], CONFIG_BOOTPARAM_STRING, sizeof(command_line));
101 command_line[sizeof(command_line) - 1] = 0;
102 #endif /* CONFIG_BOOTPARAM */
104 process_uboot_commandline(&command_line[0], sizeof(command_line));
106 pr_info("uClinux with CPU " CPU_NAME "\n");
109 pr_info("uCdimm by Lineo, Inc. <www.lineo.com>\n");
111 #ifdef CONFIG_M68VZ328
112 pr_info("M68VZ328 support by Evan Stawnyczy <e@lineo.ca>\n");
114 #ifdef CONFIG_COLDFIRE
115 pr_info("COLDFIRE port done by Greg Ungerer, gerg@snapgear.com\n");
117 pr_info("Modified for M5307 by Dave Miller, dmiller@intellistor.com\n");
120 pr_info("Modified for M5206eLITE by Rob Scott, rscott@mtrob.fdns.net\n");
123 pr_info("Flat model support (C) 1998,1999 Kenneth Albanowski, D. Jeff Dionne\n");
125 #if defined( CONFIG_PILOT ) && defined( CONFIG_M68328 )
126 pr_info("TRG SuperPilot FLASH card support <info@trgnet.com>\n");
128 #if defined( CONFIG_PILOT ) && defined( CONFIG_M68EZ328 )
129 pr_info("PalmV support by Lineo Inc. <jeff@uclinux.com>\n");
131 #ifdef CONFIG_DRAGEN2
132 pr_info("DragonEngine II board support by Georges Menie\n");
134 #ifdef CONFIG_M5235EVB
135 pr_info("Motorola M5235EVB support (C)2005 Syn-tech Systems, Inc. (Jate Sujjavanich)\n");
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);
143 memblock_add(_rambase, memory_end - _rambase);
144 memblock_reserve(_rambase, memory_start - _rambase);
146 /* Keep a copy of command line */
147 *cmdline_p = &command_line[0];
148 memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE);
149 boot_command_line[COMMAND_LINE_SIZE-1] = 0;
151 #if defined(CONFIG_FRAMEBUFFER_CONSOLE) && defined(CONFIG_DUMMY_CONSOLE)
152 conswitchp = &dummy_con;
156 * Give all the memory to the bootmap allocator, tell it to put the
157 * boot mem_map at the start of memory.
159 min_low_pfn = PFN_DOWN(memory_start);
160 max_pfn = max_low_pfn = PFN_DOWN(memory_end);
162 #if defined(CONFIG_UBOOT) && defined(CONFIG_BLK_DEV_INITRD)
163 if ((initrd_start > 0) && (initrd_start < initrd_end) &&
164 (initrd_end < memory_end))
165 memblock_reserve(initrd_start, initrd_end - initrd_start);
166 #endif /* if defined(CONFIG_BLK_DEV_INITRD) */
169 * Get kmalloc into gear.
175 * Get CPU information for use by the procfs.
177 static int show_cpuinfo(struct seq_file *m, void *v)
179 char *cpu, *mmu, *fpu;
185 clockfreq = (loops_per_jiffy * HZ) * CPU_INSTR_PER_JIFFY;
187 seq_printf(m, "CPU:\t\t%s\n"
190 "Clocking:\t%lu.%1luMHz\n"
191 "BogoMips:\t%lu.%02lu\n"
192 "Calibration:\t%lu loops\n",
195 (clockfreq / 100000) % 10,
196 (loops_per_jiffy * HZ) / 500000,
197 ((loops_per_jiffy * HZ) / 5000) % 100,
198 (loops_per_jiffy * HZ));
203 static void *c_start(struct seq_file *m, loff_t *pos)
205 return *pos < NR_CPUS ? ((void *) 0x12345678) : NULL;
208 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
211 return c_start(m, pos);
214 static void c_stop(struct seq_file *m, void *v)
218 const struct seq_operations cpuinfo_op = {
222 .show = show_cpuinfo,