1 // SPDX-License-Identifier: GPL-2.0
3 * linux/arch/m68knommu/kernel/setup.c
9 * Copyright (C) 1995 Hamish Macdonald
10 * Copyright (C) 2000 Lineo Inc. (www.lineo.com)
11 * Copyright (C) 2001 Lineo, Inc. <www.lineo.com>
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/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>
37 #include <asm/setup.h>
38 #include <asm/bootinfo.h>
40 #include <asm/machdep.h>
41 #include <asm/pgtable.h>
42 #include <asm/sections.h>
44 unsigned long memory_start;
45 unsigned long memory_end;
47 EXPORT_SYMBOL(memory_start);
48 EXPORT_SYMBOL(memory_end);
50 char __initdata command_line[COMMAND_LINE_SIZE];
52 /* machine dependent timer functions */
53 void (*mach_sched_init)(irq_handler_t handler) __initdata = NULL;
54 int (*mach_hwclk) (int, struct rtc_time*);
56 /* machine dependent reboot functions */
57 void (*mach_reset)(void);
58 void (*mach_halt)(void);
59 void (*mach_power_off)(void);
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"
69 #define CPU_NAME "MC68000"
71 #endif /* CONFIG_M68000 */
73 #define CPU_NAME "UNKNOWN"
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.
82 #ifndef CPU_INSTR_PER_JIFFY
83 #define CPU_INSTR_PER_JIFFY 16
86 void __init setup_arch(char **cmdline_p)
88 memory_start = PAGE_ALIGN(_ramstart);
91 init_mm.start_code = (unsigned long) &_stext;
92 init_mm.end_code = (unsigned long) &_etext;
93 init_mm.end_data = (unsigned long) &_edata;
94 init_mm.brk = (unsigned long) 0;
96 config_BSP(&command_line[0], sizeof(command_line));
98 #if defined(CONFIG_BOOTPARAM)
99 strncpy(&command_line[0], CONFIG_BOOTPARAM_STRING, sizeof(command_line));
100 command_line[sizeof(command_line) - 1] = 0;
101 #endif /* CONFIG_BOOTPARAM */
103 process_uboot_commandline(&command_line[0], sizeof(command_line));
105 pr_info("uClinux with CPU " CPU_NAME "\n");
108 pr_info("uCdimm by Lineo, Inc. <www.lineo.com>\n");
110 #ifdef CONFIG_M68VZ328
113 #ifdef CONFIG_COLDFIRE
122 pr_info("Flat model support (C) 1998,1999 Kenneth Albanowski, D. Jeff Dionne\n");
124 #if defined( CONFIG_PILOT ) && defined( CONFIG_M68328 )
127 #if defined( CONFIG_PILOT ) && defined( CONFIG_M68EZ328 )
130 #ifdef CONFIG_DRAGEN2
131 pr_info("DragonEngine II board support by Georges Menie\n");
133 #ifdef CONFIG_M5235EVB
134 pr_info("Motorola M5235EVB support (C)2005 Syn-tech Systems, Inc. (Jate Sujjavanich)\n");
137 pr_debug("KERNEL -> TEXT=0x%p-0x%p DATA=0x%p-0x%p BSS=0x%p-0x%p\n",
138 _stext, _etext, _sdata, _edata, __bss_start, __bss_stop);
139 pr_debug("MEMORY -> ROMFS=0x%p-0x%06lx MEM=0x%06lx-0x%06lx\n ",
140 __bss_stop, memory_start, memory_start, memory_end);
142 memblock_add(memory_start, memory_end - memory_start);
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;
149 #if defined(CONFIG_FRAMEBUFFER_CONSOLE) && defined(CONFIG_DUMMY_CONSOLE)
150 conswitchp = &dummy_con;
154 * Give all the memory to the bootmap allocator, tell it to put the
155 * boot mem_map at the start of memory.
157 min_low_pfn = PFN_DOWN(memory_start);
158 max_pfn = max_low_pfn = PFN_DOWN(memory_end);
160 #if defined(CONFIG_UBOOT) && defined(CONFIG_BLK_DEV_INITRD)
161 if ((initrd_start > 0) && (initrd_start < initrd_end) &&
162 (initrd_end < memory_end))
163 memblock_reserve(initrd_start, initrd_end - initrd_start);
164 #endif /* if defined(CONFIG_BLK_DEV_INITRD) */
167 * Get kmalloc into gear.
173 * Get CPU information for use by the procfs.
175 static int show_cpuinfo(struct seq_file *m, void *v)
177 char *cpu, *mmu, *fpu;
183 clockfreq = (loops_per_jiffy * HZ) * CPU_INSTR_PER_JIFFY;
185 seq_printf(m, "CPU:\t\t%s\n"
188 "Clocking:\t%lu.%1luMHz\n"
189 "BogoMips:\t%lu.%02lu\n"
190 "Calibration:\t%lu loops\n",
193 (clockfreq / 100000) % 10,
194 (loops_per_jiffy * HZ) / 500000,
195 ((loops_per_jiffy * HZ) / 5000) % 100,
196 (loops_per_jiffy * HZ));
201 static void *c_start(struct seq_file *m, loff_t *pos)
203 return *pos < NR_CPUS ? ((void *) 0x12345678) : NULL;
206 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
209 return c_start(m, pos);
212 static void c_stop(struct seq_file *m, void *v)
216 const struct seq_operations cpuinfo_op = {
220 .show = show_cpuinfo,