text: // SPDX-License-Identifier: GPL-2.0
  /*
   *  linux/arch/m68knommu/kernel/setup.c
   *
   *  Copyright (C) 1999-2007  Greg Ungerer (gerg@snapgear.com)
   *  Copyright (C) 1998,1999  D. Jeff Dionne <jeff@uClinux.org>
   *  Copyleft  ()) 2000       James D. Schettine {james@telos-systems.com}
   *  Copyright (C) 1998       Kenneth Albanowski <kjahds@kjahds.com>
   *  Copyright (C) 1995       Hamish Macdonald
   *  Copyright (C) 2000       Lineo Inc. (www.lineo.com)
   *  Copyright (C) 2001 	     Lineo, Inc. <www.lineo.com>
   *
   *  68VZ328 Fixes/support    Evan Stawnyczy <e@lineo.ca>
   */
  
  /*
   * This file handles the architecture-dependent parts of system setup
   */
  
  #include <linux/kernel.h>
  #include <linux/sched.h>
  #include <linux/delay.h>
  #include <linux/interrupt.h>
  #include <linux/fb.h>
  #include <linux/module.h>
  #include <linux/mm.h>
  #include <linux/console.h>
  #include <linux/errno.h>
  #include <linux/string.h>
  #include <linux/memblock.h>
  #include <linux/seq_file.h>
  #include <linux/init.h>
  #include <linux/initrd.h>
  #include <linux/root_dev.h>
  #include <linux/rtc.h>
  
  #include <asm/setup.h>
  #include <asm/bootinfo.h>
  #include <asm/irq.h>
  #include <asm/machdep.h>
  #include <asm/sections.h>
  
  unsigned long memory_start;
  unsigned long memory_end;
  
  EXPORT_SYMBOL(memory_start);
  EXPORT_SYMBOL(memory_end);
  
  char __initdata command_line[COMMAND_LINE_SIZE];
  
  /* machine dependent timer functions */
  void (*mach_sched_init)(void) __initdata = NULL;
  int (*mach_hwclk) (int, struct rtc_time*);
  
  /* machine dependent reboot functions */
  void (*mach_reset)(void);
  void (*mach_halt)(void);
  void (*mach_power_off)(void);
  
  #ifdef CONFIG_M68000
  #if defined(CONFIG_M68328)
  #define CPU_NAME	"MC68328"
  #elif defined(CONFIG_M68EZ328)
  #define CPU_NAME	"MC68EZ328"
  #elif defined(CONFIG_M68VZ328)
  #define CPU_NAME	"MC68VZ328"
  #else
  #define CPU_NAME	"MC68000"
  #endif
  #endif /* CONFIG_M68000 */
  #ifndef CPU_NAME
  #define	CPU_NAME	"UNKNOWN"
  #endif
  
  /*
   * Different cores have different instruction execution timings.
   * The old/traditional 68000 cores are basically all the same, at 16.
   * The ColdFire cores vary a little, their values are defined in their
   * headers. We default to the standard 68000 value here.
   */
  #ifndef CPU_INSTR_PER_JIFFY
  #define	CPU_INSTR_PER_JIFFY	16
  #endif
  
  void __init setup_arch(char **cmdline_p)
  {
  	memory_start = PAGE_ALIGN(_ramstart);
  	memory_end = _ramend;
  
  	init_mm.start_code = (unsigned long) &_stext;
  	init_mm.end_code = (unsigned long) &_etext;
  	init_mm.end_data = (unsigned long) &_edata;
  	init_mm.brk = (unsigned long) 0;
  
  	config_BSP(&command_line[0], sizeof(command_line));
  
  #if defined(CONFIG_BOOTPARAM)
  	strncpy(&command_line[0], CONFIG_BOOTPARAM_STRING, sizeof(command_line));
  	command_line[sizeof(command_line) - 1] = 0;
  #endif /* CONFIG_BOOTPARAM */
  
  	process_uboot_commandline(&command_line[0], sizeof(command_line));
  
  	pr_info("uClinux with CPU " CPU_NAME "\n");
  
  #ifdef CONFIG_UCDIMM
  	pr_info("uCdimm by Lineo, Inc. <www.lineo.com>\n");
  #endif
  #ifdef CONFIG_M68328
  	pr_info("68328 support D. Jeff Dionne <jeff@uclinux.org>\n");
  	pr_info("68328 support Kenneth Albanowski <kjahds@kjshds.com>\n");
  #endif
  #ifdef CONFIG_M68EZ328
  	pr_info("68EZ328 DragonBallEZ support (C) 1999 Rt-Control, Inc\n");
  #endif
  #ifdef CONFIG_M68VZ328
  	pr_info("M68VZ328 support by Evan Stawnyczy <e@lineo.ca>\n");
  	pr_info("68VZ328 DragonBallVZ support (c) 2001 Lineo, Inc.\n");
  #endif
  #ifdef CONFIG_COLDFIRE
  	pr_info("COLDFIRE port done by Greg Ungerer, gerg@snapgear.com\n");
  #ifdef CONFIG_M5307
  	pr_info("Modified for M5307 by Dave Miller, dmiller@intellistor.com\n");
  #endif
  #ifdef CONFIG_ELITE
  	pr_info("Modified for M5206eLITE by Rob Scott, rscott@mtrob.fdns.net\n");
  #endif
  #endif
  	pr_info("Flat model support (C) 1998,1999 Kenneth Albanowski, D. Jeff Dionne\n");
  
  #if defined( CONFIG_PILOT ) && defined( CONFIG_M68328 )
  	pr_info("68328/Pilot support Bernhard Kuhn <kuhn@lpr.e-technik.tu-muenchen.de>\n");
  	pr_info("TRG SuperPilot FLASH card support <info@trgnet.com>\n");
  #endif
  #if defined( CONFIG_PILOT ) && defined( CONFIG_M68EZ328 )
  	pr_info("PalmV support by Lineo Inc. <jeff@uclinux.com>\n");
  #endif
  #ifdef CONFIG_DRAGEN2
  	pr_info("DragonEngine II board support by Georges Menie\n");
  #endif
  #ifdef CONFIG_M5235EVB
  	pr_info("Motorola M5235EVB support (C)2005 Syn-tech Systems, Inc. (Jate Sujjavanich)\n");
  #endif
  
  	pr_debug("KERNEL -> TEXT=0x%p-0x%p DATA=0x%p-0x%p BSS=0x%p-0x%p\n",
  		 _stext, _etext, _sdata, _edata, __bss_start, __bss_stop);
  	pr_debug("MEMORY -> ROMFS=0x%p-0x%06lx MEM=0x%06lx-0x%06lx\n ",
  		 __bss_stop, memory_start, memory_start, memory_end);
  
  	memblock_add(_rambase, memory_end - _rambase);
  	memblock_reserve(_rambase, memory_start - _rambase);
  
  	/* Keep a copy of command line */
  	*cmdline_p = &command_line[0];
  	memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE);
  	boot_command_line[COMMAND_LINE_SIZE-1] = 0;
  
  	/*
  	 * Give all the memory to the bootmap allocator, tell it to put the
  	 * boot mem_map at the start of memory.
  	 */
  	min_low_pfn = PFN_DOWN(memory_start);
  	max_pfn = max_low_pfn = PFN_DOWN(memory_end);
  
  #if defined(CONFIG_UBOOT) && defined(CONFIG_BLK_DEV_INITRD)
  	if ((initrd_start > 0) && (initrd_start < initrd_end) &&
  			(initrd_end < memory_end))
  		memblock_reserve(initrd_start, initrd_end - initrd_start);
  #endif /* if defined(CONFIG_BLK_DEV_INITRD) */
  
  	/*
  	 * Get kmalloc into gear.
  	 */
  	paging_init();
  }
  
  /*
   *	Get CPU information for use by the procfs.
   */
  static int show_cpuinfo(struct seq_file *m, void *v)
  {
  	char *cpu, *mmu, *fpu;
  	u_long clockfreq;
  
  	cpu = CPU_NAME;
  	mmu = "none";
  	fpu = "none";
  	clockfreq = (loops_per_jiffy * HZ) * CPU_INSTR_PER_JIFFY;
  
  	seq_printf(m, "CPU:\t\t%s\n"
  		      "MMU:\t\t%s\n"
  		      "FPU:\t\t%s\n"
  		      "Clocking:\t%lu.%1luMHz\n"
  		      "BogoMips:\t%lu.%02lu\n"
  		      "Calibration:\t%lu loops\n",
  		      cpu, mmu, fpu,
  		      clockfreq / 1000000,
  		      (clockfreq / 100000) % 10,
  		      (loops_per_jiffy * HZ) / 500000,
  		      ((loops_per_jiffy * HZ) / 5000) % 100,
  		      (loops_per_jiffy * HZ));
  
  	return 0;
  }
  
  static void *c_start(struct seq_file *m, loff_t *pos)
  {
  	return *pos < NR_CPUS ? ((void *) 0x12345678) : NULL;
  }
  
  static void *c_next(struct seq_file *m, void *v, loff_t *pos)
  {
  	++*pos;
  	return c_start(m, pos);
  }
  
  static void c_stop(struct seq_file *m, void *v)
  {
  }
  
  const struct seq_operations cpuinfo_op = {
  	.start	= c_start,
  	.next	= c_next,
  	.stop	= c_stop,
  	.show	= show_cpuinfo,
  };
  
  