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kernel-ark/arch/m68k/kernel/setup_no.c
Greg Ungerer 35aefb2645 m68knommu: modify timer init code to make it consistent with m68k code 
With a few small changes we can make the m68knommu timer init code the
same as the m68k code. By using the mach_sched_init function pointer
and reworking the current timer initializers to keep track of the common
m68k timer_interrupt() handler we end up with almost identical code for
m68knommu.

This will allow us to more easily merge the mmu and non-mmu m68k time.c
in future patches.

Signed-off-by: Greg Ungerer <gerg@uclinux.org>
2012-03-05 09:43:04 +10:00

318 lines
8.9 KiB
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/*
* 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/bootmem.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/irq.h>
#include <asm/machdep.h>
#include <asm/pgtable.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)(irq_handler_t handler) __initdata = NULL;
int (*mach_set_clock_mmss)(unsigned long);
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_M68328
#define CPU_NAME "MC68328"
#endif
#ifdef CONFIG_M68EZ328
#define CPU_NAME "MC68EZ328"
#endif
#ifdef CONFIG_M68VZ328
#define CPU_NAME "MC68VZ328"
#endif
#ifdef CONFIG_M68360
#define CPU_NAME "MC68360"
#endif
#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
#if defined(CONFIG_UBOOT)
/*
* parse_uboot_commandline
*
* Copies u-boot commandline arguments and store them in the proper linux
* variables.
*
* Assumes:
* _init_sp global contains the address in the stack pointer when the
* kernel starts (see head.S::_start)
*
* U-Boot calling convention:
* (*kernel) (kbd, initrd_start, initrd_end, cmd_start, cmd_end);
*
* _init_sp can be parsed as such
*
* _init_sp+00 = u-boot cmd after jsr into kernel (skip)
* _init_sp+04 = &kernel board_info (residual data)
* _init_sp+08 = &initrd_start
* _init_sp+12 = &initrd_end
* _init_sp+16 = &cmd_start
* _init_sp+20 = &cmd_end
*
* This also assumes that the memory locations pointed to are still
* unmodified. U-boot places them near the end of external SDRAM.
*
* Argument(s):
* commandp = the linux commandline arg container to fill.
* size = the sizeof commandp.
*
* Returns:
*/
void parse_uboot_commandline(char *commandp, int size)
{
extern unsigned long _init_sp;
unsigned long *sp;
unsigned long uboot_kbd;
unsigned long uboot_initrd_start, uboot_initrd_end;
unsigned long uboot_cmd_start, uboot_cmd_end;
sp = (unsigned long *)_init_sp;
uboot_kbd = sp[1];
uboot_initrd_start = sp[2];
uboot_initrd_end = sp[3];
uboot_cmd_start = sp[4];
uboot_cmd_end = sp[5];
if (uboot_cmd_start && uboot_cmd_end)
strncpy(commandp, (const char *)uboot_cmd_start, size);
#if defined(CONFIG_BLK_DEV_INITRD)
if (uboot_initrd_start && uboot_initrd_end &&
(uboot_initrd_end > uboot_initrd_start)) {
initrd_start = uboot_initrd_start;
initrd_end = uboot_initrd_end;
ROOT_DEV = Root_RAM0;
printk(KERN_INFO "initrd at 0x%lx:0x%lx\n",
initrd_start, initrd_end);
}
#endif /* if defined(CONFIG_BLK_DEV_INITRD) */
}
#endif /* #if defined(CONFIG_UBOOT) */
void __init setup_arch(char **cmdline_p)
{
int bootmap_size;
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 */
#if defined(CONFIG_UBOOT)
/* CONFIG_UBOOT and CONFIG_BOOTPARAM defined, concatenate cmdline */
#if defined(CONFIG_BOOTPARAM)
/* Add the whitespace separator */
command_line[strlen(CONFIG_BOOTPARAM_STRING)] = ' ';
/* Parse uboot command line into the rest of the buffer */
parse_uboot_commandline(
&command_line[(strlen(CONFIG_BOOTPARAM_STRING)+1)],
(sizeof(command_line) -
(strlen(CONFIG_BOOTPARAM_STRING)+1)));
/* Only CONFIG_UBOOT defined, create cmdline */
#else
parse_uboot_commandline(&command_line[0], sizeof(command_line));
#endif /* CONFIG_BOOTPARAM */
command_line[sizeof(command_line) - 1] = 0;
#endif /* CONFIG_UBOOT */
printk(KERN_INFO "\x0F\r\n\nuClinux/" CPU_NAME "\n");
#ifdef CONFIG_UCDIMM
printk(KERN_INFO "uCdimm by Lineo, Inc. <www.lineo.com>\n");
#endif
#ifdef CONFIG_M68VZ328
printk(KERN_INFO "M68VZ328 support by Evan Stawnyczy <e@lineo.ca>\n");
#endif
#ifdef CONFIG_COLDFIRE
printk(KERN_INFO "COLDFIRE port done by Greg Ungerer, gerg@snapgear.com\n");
#ifdef CONFIG_M5307
printk(KERN_INFO "Modified for M5307 by Dave Miller, dmiller@intellistor.com\n");
#endif
#ifdef CONFIG_ELITE
printk(KERN_INFO "Modified for M5206eLITE by Rob Scott, rscott@mtrob.fdns.net\n");
#endif
#endif
printk(KERN_INFO "Flat model support (C) 1998,1999 Kenneth Albanowski, D. Jeff Dionne\n");
#if defined( CONFIG_PILOT ) && defined( CONFIG_M68328 )
printk(KERN_INFO "TRG SuperPilot FLASH card support <info@trgnet.com>\n");
#endif
#if defined( CONFIG_PILOT ) && defined( CONFIG_M68EZ328 )
printk(KERN_INFO "PalmV support by Lineo Inc. <jeff@uclinux.com>\n");
#endif
#if defined (CONFIG_M68360)
printk(KERN_INFO "QUICC port done by SED Systems <hamilton@sedsystems.ca>,\n");
printk(KERN_INFO "based on 2.0.38 port by Lineo Inc. <mleslie@lineo.com>.\n");
#endif
#ifdef CONFIG_DRAGEN2
printk(KERN_INFO "DragonEngine II board support by Georges Menie\n");
#endif
#ifdef CONFIG_M5235EVB
printk(KERN_INFO "Motorola M5235EVB support (C)2005 Syn-tech Systems, Inc. (Jate Sujjavanich)\n");
#endif
pr_debug("KERNEL -> TEXT=0x%06x-0x%06x DATA=0x%06x-0x%06x "
"BSS=0x%06x-0x%06x\n", (int) &_stext, (int) &_etext,
(int) &_sdata, (int) &_edata,
(int) &_sbss, (int) &_ebss);
pr_debug("MEMORY -> ROMFS=0x%06x-0x%06x MEM=0x%06x-0x%06x\n ",
(int) &_ebss, (int) memory_start,
(int) memory_start, (int) memory_end);
/* 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;
#if defined(CONFIG_FRAMEBUFFER_CONSOLE) && defined(CONFIG_DUMMY_CONSOLE)
conswitchp = &dummy_con;
#endif
/*
* Give all the memory to the bootmap allocator, tell it to put the
* boot mem_map at the start of memory.
*/
bootmap_size = init_bootmem_node(
NODE_DATA(0),
memory_start >> PAGE_SHIFT, /* map goes here */
PAGE_OFFSET >> PAGE_SHIFT, /* 0 on coldfire */
memory_end >> PAGE_SHIFT);
/*
* Free the usable memory, we have to make sure we do not free
* the bootmem bitmap so we then reserve it after freeing it :-)
*/
free_bootmem(memory_start, memory_end - memory_start);
reserve_bootmem(memory_start, bootmap_size, BOOTMEM_DEFAULT);
#if defined(CONFIG_UBOOT) && defined(CONFIG_BLK_DEV_INITRD)
if ((initrd_start > 0) && (initrd_start < initrd_end) &&
(initrd_end < memory_end))
reserve_bootmem(initrd_start, initrd_end - initrd_start,
BOOTMEM_DEFAULT);
#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,
};
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