setup_no.c

  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/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 <jeff@uclinux.org>\n");
104	pr_info("68328 support Kenneth Albanowski <kjahds@kjshds.com>\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 <e@lineo.ca>\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, gerg@snapgear.com\n");
115#ifdef CONFIG_M5307
116	pr_info("Modified for M5307 by Dave Miller, dmiller@intellistor.com\n");
117#endif
118#ifdef CONFIG_ELITE
119	pr_info("Modified for M5206eLITE by Rob Scott, rscott@mtrob.fdns.net\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 <kuhn@lpr.e-technik.tu-muenchen.de>\n");
126	pr_info("TRG SuperPilot FLASH card support <info@trgnet.com>\n");
127#endif
128#if defined( CONFIG_PILOT ) && defined( CONFIG_M68EZ328 )
129	pr_info("PalmV support by Lineo Inc. <jeff@uclinux.com>\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