Quelle  setup_no.c   Sprache: C

// 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/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;

/* machine dependent reboot functions */
void (*mach_reset)(void);
void (*mach_halt)(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;

 setup_initial_init_mm(_stext, _etext, _edata, NULL);

 config_BSP(&command_line[0], sizeof(command_line));

#if defined(CONFIG_BOOTPARAM)
 strscpy(&command_line[0], CONFIG_BOOTPARAM_STRING, sizeof(command_line));
#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. \n");
#endif
#ifdef CONFIG_M68328
 pr_info("68328 support D. Jeff Dionne \n");
 pr_info("68328 support Kenneth Albanowski \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 \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 \n");
 pr_info("TRG SuperPilot FLASH card support \n");
#endif
#if defined( CONFIG_PILOT ) && defined( CONFIG_M68EZ328 )
 pr_info("PalmV support by Lineo Inc. \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];
 strscpy(boot_command_line, command_line, COMMAND_LINE_SIZE);

 /*
 * 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,
};