mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-05 02:19:51 +00:00
![Kefeng Wang](/assets/img/avatar_default.png)
Use setup_initial_init_mm() helper to simplify code. Link: https://lkml.kernel.org/r/20210608083418.137226-8-wangkefeng.wang@huawei.com Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com> Acked-by: Greg Ungerer <gerg@linux-m68k.org> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
224 lines
6.2 KiB
C
224 lines
6.2 KiB
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/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;
|
|
|
|
setup_initial_init_mm(_stext, _etext, _edata, NULL);
|
|
|
|
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,
|
|
};
|
|
|