microblaze_v8: setup.c, setup.h - system setting

/*

 * Copyright (C) 2007-2008 Michal Simek <monstr@monstr.eu>

 * Copyright (C) 2006 Atmark Techno, Inc.

 *

 * This file is subject to the terms and conditions of the GNU General Public

 * License. See the file "COPYING" in the main directory of this archive

 * for more details.

 */

#ifndef _ASM_MICROBLAZE_SETUP_H

#define _ASM_MICROBLAZE_SETUP_H

#define COMMAND_LINE_SIZE	256

# ifndef __ASSEMBLY__

#  ifdef __KERNEL__

extern unsigned int boot_cpuid; /* move to smp.h */

extern char cmd_line[COMMAND_LINE_SIZE];

#  endif/* __KERNEL__ */

void early_printk(const char *fmt, ...);

int setup_early_printk(char *opt);

void disable_early_printk(void);

void heartbeat(void);

void setup_heartbeat(void);

unsigned long long sched_clock(void);

void time_init(void);

void init_IRQ(void);

void machine_early_init(const char *cmdline, unsigned int ram,

						unsigned int fdt);

void machine_restart(char *cmd);

void machine_shutdown(void);

void machine_halt(void);

void machine_power_off(void);

# endif /* __ASSEMBLY__ */

#endif /* _ASM_MICROBLAZE_SETUP_H */

/*

 * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu>

 * Copyright (C) 2007-2009 PetaLogix

 * Copyright (C) 2006 Atmark Techno, Inc.

 *

 * This file is subject to the terms and conditions of the GNU General Public

 * License. See the file "COPYING" in the main directory of this archive

 * for more details.

 */

#include <linux/init.h>

#include <linux/string.h>

#include <linux/seq_file.h>

#include <linux/cpu.h>

#include <linux/initrd.h>

#include <linux/console.h>

#include <linux/debugfs.h>

#include <asm/setup.h>

#include <asm/sections.h>

#include <asm/page.h>

#include <linux/io.h>

#include <linux/bug.h>

#include <linux/param.h>

#include <linux/cache.h>

#include <asm/cacheflush.h>

#include <asm/entry.h>

#include <asm/cpuinfo.h>

#include <asm/system.h>

#include <asm/prom.h>

#include <asm/pgtable.h>

DEFINE_PER_CPU(unsigned int, KSP);	/* Saved kernel stack pointer */

DEFINE_PER_CPU(unsigned int, KM);	/* Kernel/user mode */

DEFINE_PER_CPU(unsigned int, ENTRY_SP);	/* Saved SP on kernel entry */

DEFINE_PER_CPU(unsigned int, R11_SAVE);	/* Temp variable for entry */

DEFINE_PER_CPU(unsigned int, CURRENT_SAVE);	/* Saved current pointer */

unsigned int boot_cpuid;

char cmd_line[COMMAND_LINE_SIZE];

void __init setup_arch(char **cmdline_p)

{

#ifdef CONFIG_CMDLINE_FORCE

	strlcpy(cmd_line, CONFIG_CMDLINE, COMMAND_LINE_SIZE);

	strlcpy(boot_command_line, CONFIG_CMDLINE, COMMAND_LINE_SIZE);

#endif

	*cmdline_p = cmd_line;

	console_verbose();

	unflatten_device_tree();

	/* NOTE I think that this function is not necessary to call */

	/* irq_early_init(); */

	setup_cpuinfo();

	__invalidate_icache_all();

	__enable_icache();

	__invalidate_dcache_all();

	__enable_dcache();

	panic_timeout = 120;

	setup_memory();

#if defined(CONFIG_SELFMOD_INTC) || defined(CONFIG_SELFMOD_TIMER)

	printk(KERN_NOTICE "Self modified code enable\n");

#endif

#ifdef CONFIG_VT

#if defined(CONFIG_XILINX_CONSOLE)

	conswitchp = &xil_con;

#elif defined(CONFIG_DUMMY_CONSOLE)

	conswitchp = &dummy_con;

#endif

#endif

}

#ifdef CONFIG_MTD_UCLINUX

/* Handle both romfs and cramfs types, without generating unnecessary

 code (ie no point checking for CRAMFS if it's not even enabled) */

inline unsigned get_romfs_len(unsigned *addr)

{

#ifdef CONFIG_ROMFS_FS

	if (memcmp(&addr[0], "-rom1fs-", 8) == 0) /* romfs */

		return be32_to_cpu(addr[2]);

#endif

#ifdef CONFIG_CRAMFS

	if (addr[0] == le32_to_cpu(0x28cd3d45)) /* cramfs */

		return le32_to_cpu(addr[1]);

#endif

	return 0;

}

#endif	/* CONFIG_MTD_UCLINUX_EBSS */

void __init machine_early_init(const char *cmdline, unsigned int ram,

		unsigned int fdt)

{

	unsigned long *src, *dst = (unsigned long *)0x0;

/* clearing bss section */

	memset(__bss_start, 0, __bss_stop-__bss_start);

	memset(_ssbss, 0, _esbss-_ssbss);

	/*

	 * Copy command line passed from bootloader, or use default

	 * if none provided, or forced

	 */

#ifndef CONFIG_CMDLINE_BOOL

	if (cmdline && cmdline[0] != '\0')

		strlcpy(cmd_line, cmdline, COMMAND_LINE_SIZE);

#endif

/* initialize device tree for usage in early_printk */

	early_init_devtree((void *)_fdt_start);

#ifdef CONFIG_EARLY_PRINTK

	setup_early_printk(NULL);

#endif

	early_printk("Ramdisk addr 0x%08x, FDT 0x%08x\n", ram, fdt);

	printk(KERN_NOTICE "Found FDT at 0x%08x\n", fdt);

#ifdef CONFIG_MTD_UCLINUX

	{

		int size;

		unsigned int romfs_base;

		romfs_base = (ram ? ram : (unsigned int)&__init_end);

		/* if CONFIG_MTD_UCLINUX_EBSS is defined, assume ROMFS is at the

		 * end of kernel, which is ROMFS_LOCATION defined above. */

		size = PAGE_ALIGN(get_romfs_len((unsigned *)romfs_base));

		early_printk("Found romfs @ 0x%08x (0x%08x)\n",

				romfs_base, size);

		early_printk("#### klimit %p ####\n", klimit);

		BUG_ON(size < 0); /* What else can we do? */

		/* Use memmove to handle likely case of memory overlap */

		early_printk("Moving 0x%08x bytes from 0x%08x to 0x%08x\n",

			size, romfs_base, (unsigned)&_ebss);

		memmove(&_ebss, (int *)romfs_base, size);

		/* update klimit */

		klimit += PAGE_ALIGN(size);

		early_printk("New klimit: 0x%08x\n", (unsigned)klimit);

	}

#endif

	for (src = __ivt_start; src < __ivt_end; src++, dst++)

		*dst = *src;

	/* Initialize global data */

	per_cpu(KM, 0) = 0x1;	/* We start in kernel mode */

	per_cpu(CURRENT_SAVE, 0) = (unsigned long)current;

}

#ifdef CONFIG_DEBUG_FS

struct dentry *of_debugfs_root;

static int microblaze_debugfs_init(void)

{

	of_debugfs_root = debugfs_create_dir("microblaze", NULL);

	return of_debugfs_root == NULL;

}

arch_initcall(microblaze_debugfs_init);

#endif

void machine_restart(char *cmd)

{

	printk(KERN_NOTICE "Machine restart...\n");

	dump_stack();

	while (1)

		;

}

void machine_shutdown(void)

{

	printk(KERN_NOTICE "Machine shutdown...\n");

	while (1)

		;

}

void machine_halt(void)

{

	printk(KERN_NOTICE "Machine halt...\n");

	while (1)

		;

}

void machine_power_off(void)

{

	printk(KERN_NOTICE "Machine power off...\n");

	while (1)

		;

}