arch/mn10300/kernel/setup.c - linux-imx - Git at Google

 /* MN10300 Arch-specific initialisation
  *
  * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
  * Written by David Howells (dhowells@redhat.com)
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public Licence
  * as published by the Free Software Foundation; either version
  * 2 of the Licence, or (at your option) any later version.
  */
 #include <linux/errno.h>
 #include <linux/sched.h>
 #include <linux/kernel.h>
 #include <linux/mm.h>
 #include <linux/stddef.h>
 #include <linux/unistd.h>
 #include <linux/ptrace.h>
 #include <linux/user.h>
 #include <linux/tty.h>
 #include <linux/ioport.h>
 #include <linux/delay.h>
 #include <linux/init.h>
 #include <linux/bootmem.h>
 #include <linux/seq_file.h>
 #include <linux/cpu.h>
 #include <asm/processor.h>
 #include <linux/console.h>
 #include <asm/uaccess.h>
 #include <asm/setup.h>
 #include <asm/io.h>
 #include <asm/smp.h>
 #include <proc/proc.h>
 #include <asm/fpu.h>
 #include <asm/sections.h>

 struct mn10300_cpuinfo boot_cpu_data;

 static char __initdata cmd_line[COMMAND_LINE_SIZE];
 char redboot_command_line[COMMAND_LINE_SIZE] =
 	"console=ttyS0,115200 root=/dev/mtdblock3 rw";

 char __initdata redboot_platform_name[COMMAND_LINE_SIZE];

 static struct resource code_resource = {
 	.start	= 0x100000,
 	.end	= 0,
 	.name	= "Kernel code",
 };

 static struct resource data_resource = {
 	.start	= 0,
 	.end	= 0,
 	.name	= "Kernel data",
 };

 static unsigned long __initdata phys_memory_base;
 static unsigned long __initdata phys_memory_end;
 static unsigned long __initdata memory_end;
 unsigned long memory_size;

 struct thread_info *__current_ti = &init_thread_union.thread_info;
 struct task_struct *__current = &init_task;

 #define mn10300_known_cpus 5
 static const char *const mn10300_cputypes[] = {
 	"am33-1",
 	"am33-2",
 	"am34-1",
 	"am33-3",
 	"am34-2",
 	"unknown"
 };

 /*
  * Pick out the memory size.  We look for mem=size,
  * where size is "size[KkMm]"
  */
 static int __init early_mem(char *p)
 {
 	memory_size = memparse(p, &p);

 	if (memory_size == 0)
 		panic("Memory size not known\n");

 	return 0;
 }
 early_param("mem", early_mem);

 /*
  * architecture specific setup
  */
 void __init setup_arch(char **cmdline_p)
 {
 	unsigned long bootmap_size;
 	unsigned long kstart_pfn, start_pfn, free_pfn, end_pfn;

 	cpu_init();
 	unit_setup();
 	smp_init_cpus();

 	/* save unparsed command line copy for /proc/cmdline */
 	strlcpy(boot_command_line, redboot_command_line, COMMAND_LINE_SIZE);

 	/* populate cmd_line too for later use, preserving boot_command_line */
 	strlcpy(cmd_line, boot_command_line, COMMAND_LINE_SIZE);
 	*cmdline_p = cmd_line;

 	parse_early_param();

 	memory_end = (unsigned long) CONFIG_KERNEL_RAM_BASE_ADDRESS +
 		memory_size;
 	if (memory_end > phys_memory_end)
 		memory_end = phys_memory_end;

 	init_mm.start_code = (unsigned long)&_text;
 	init_mm.end_code = (unsigned long) &_etext;
 	init_mm.end_data = (unsigned long) &_edata;
 	init_mm.brk = (unsigned long) &_end;

 	code_resource.start = virt_to_bus(&_text);
 	code_resource.end = virt_to_bus(&_etext)-1;
 	data_resource.start = virt_to_bus(&_etext);
 	data_resource.end = virt_to_bus(&_edata)-1;

 	start_pfn = (CONFIG_KERNEL_RAM_BASE_ADDRESS >> PAGE_SHIFT);
 	kstart_pfn = PFN_UP(__pa(&_text));
 	free_pfn = PFN_UP(__pa(&_end));
 	end_pfn = PFN_DOWN(__pa(memory_end));

 	bootmap_size = init_bootmem_node(&contig_page_data,
 					 free_pfn,
 					 start_pfn,
 					 end_pfn);

 	if (kstart_pfn > start_pfn)
 		free_bootmem(PFN_PHYS(start_pfn),
 			     PFN_PHYS(kstart_pfn - start_pfn));

 	free_bootmem(PFN_PHYS(free_pfn),
 		     PFN_PHYS(end_pfn - free_pfn));

 	/* If interrupt vector table is in main ram, then we need to
 	   reserve the page it is occupying. */
 	if (CONFIG_INTERRUPT_VECTOR_BASE >= CONFIG_KERNEL_RAM_BASE_ADDRESS &&
 	    CONFIG_INTERRUPT_VECTOR_BASE < memory_end)
 		reserve_bootmem(CONFIG_INTERRUPT_VECTOR_BASE, PAGE_SIZE,
 				BOOTMEM_DEFAULT);

 	reserve_bootmem(PAGE_ALIGN(PFN_PHYS(free_pfn)), bootmap_size,
 			BOOTMEM_DEFAULT);

 #ifdef CONFIG_VT
 #if defined(CONFIG_VGA_CONSOLE)
 	conswitchp = &vga_con;
 #elif defined(CONFIG_DUMMY_CONSOLE)
 	conswitchp = &dummy_con;
 #endif
 #endif

 	paging_init();
 }

 /*
  * perform CPU initialisation
  */
 void __init cpu_init(void)
 {
 	unsigned long cpurev = CPUREV, type;

 	type = (CPUREV & CPUREV_TYPE) >> CPUREV_TYPE_S;
 	if (type > mn10300_known_cpus)
 		type = mn10300_known_cpus;

 	printk(KERN_INFO "Panasonic %s, rev %ld\n",
 	       mn10300_cputypes[type],
 	       (cpurev & CPUREV_REVISION) >> CPUREV_REVISION_S);

 	get_mem_info(&phys_memory_base, &memory_size);
 	phys_memory_end = phys_memory_base + memory_size;

 	fpu_init_state();
 }

 static struct cpu cpu_devices[NR_CPUS];

 static int __init topology_init(void)
 {
 	int i;

 	for_each_present_cpu(i)
 		register_cpu(&cpu_devices[i], i);

 	return 0;
 }

 subsys_initcall(topology_init);

 /*
  * Get CPU information for use by the procfs.
  */
 static int show_cpuinfo(struct seq_file *m, void *v)
 {
 #ifdef CONFIG_SMP
 	struct mn10300_cpuinfo *c = v;
 	unsigned long cpu_id = c - cpu_data;
 	unsigned long cpurev = c->type, type, icachesz, dcachesz;
 #else  /* CONFIG_SMP */
 	unsigned long cpu_id = 0;
 	unsigned long cpurev = CPUREV, type, icachesz, dcachesz;
 #endif /* CONFIG_SMP */

 #ifdef CONFIG_SMP
 	if (!cpu_online(cpu_id))
 		return 0;
 #endif

 	type = (cpurev & CPUREV_TYPE) >> CPUREV_TYPE_S;
 	if (type > mn10300_known_cpus)
 		type = mn10300_known_cpus;

 	icachesz =
 		((cpurev & CPUREV_ICWAY ) >> CPUREV_ICWAY_S)  *
 		((cpurev & CPUREV_ICSIZE) >> CPUREV_ICSIZE_S) *
 		1024;

 	dcachesz =
 		((cpurev & CPUREV_DCWAY ) >> CPUREV_DCWAY_S)  *
 		((cpurev & CPUREV_DCSIZE) >> CPUREV_DCSIZE_S) *
 		1024;

 	seq_printf(m,
 		   "processor  : %ld\n"
 		   "vendor_id  : " PROCESSOR_VENDOR_NAME "\n"
 		   "cpu core   : %s\n"
 		   "cpu rev    : %lu\n"
 		   "model name : " PROCESSOR_MODEL_NAME		"\n"
 		   "icache size: %lu\n"
 		   "dcache size: %lu\n",
 		   cpu_id,
 		   mn10300_cputypes[type],
 		   (cpurev & CPUREV_REVISION) >> CPUREV_REVISION_S,
 		   icachesz,
 		   dcachesz
 		   );

 	seq_printf(m,
 		   "ioclk speed: %lu.%02luMHz\n"
 		   "bogomips   : %lu.%02lu\n\n",
 		   MN10300_IOCLK / 1000000,
 		   (MN10300_IOCLK / 10000) % 100,
 #ifdef CONFIG_SMP
 		   c->loops_per_jiffy / (500000 / HZ),
 		   (c->loops_per_jiffy / (5000 / HZ)) % 100
 #else  /* CONFIG_SMP */
 		   loops_per_jiffy / (500000 / HZ),
 		   (loops_per_jiffy / (5000 / HZ)) % 100
 #endif /* CONFIG_SMP */
 		   );

 	return 0;
 }

 static void *c_start(struct seq_file *m, loff_t *pos)
 {
 	return *pos < NR_CPUS ? cpu_data + *pos : 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,
 };
	/* MN10300 Arch-specific initialisation
	*
	* Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
	* Written by David Howells (dhowells@redhat.com)
	*
	* This program is free software; you can redistribute it and/or
	* modify it under the terms of the GNU General Public Licence
	* as published by the Free Software Foundation; either version
	* 2 of the Licence, or (at your option) any later version.
	*/
	#include <linux/errno.h>
	#include <linux/sched.h>
	#include <linux/kernel.h>
	#include <linux/mm.h>
	#include <linux/stddef.h>
	#include <linux/unistd.h>
	#include <linux/ptrace.h>
	#include <linux/user.h>
	#include <linux/tty.h>
	#include <linux/ioport.h>
	#include <linux/delay.h>
	#include <linux/init.h>
	#include <linux/bootmem.h>
	#include <linux/seq_file.h>
	#include <linux/cpu.h>
	#include <asm/processor.h>
	#include <linux/console.h>
	#include <asm/uaccess.h>
	#include <asm/setup.h>
	#include <asm/io.h>
	#include <asm/smp.h>
	#include <proc/proc.h>
	#include <asm/fpu.h>
	#include <asm/sections.h>

	struct mn10300_cpuinfo boot_cpu_data;

	static char __initdata cmd_line[COMMAND_LINE_SIZE];
	char redboot_command_line[COMMAND_LINE_SIZE] =
	"console=ttyS0,115200 root=/dev/mtdblock3 rw";

	char __initdata redboot_platform_name[COMMAND_LINE_SIZE];

	static struct resource code_resource = {
	.start = 0x100000,
	.end = 0,
	.name = "Kernel code",
	};

	static struct resource data_resource = {
	.start = 0,
	.end = 0,
	.name = "Kernel data",
	};

	static unsigned long __initdata phys_memory_base;
	static unsigned long __initdata phys_memory_end;
	static unsigned long __initdata memory_end;
	unsigned long memory_size;

	struct thread_info *__current_ti = &init_thread_union.thread_info;
	struct task_struct *__current = &init_task;

	#define mn10300_known_cpus 5
	static const char *const mn10300_cputypes[] = {
	"am33-1",
	"am33-2",
	"am34-1",
	"am33-3",
	"am34-2",
	"unknown"
	};

	/*
	* Pick out the memory size. We look for mem=size,
	* where size is "size[KkMm]"
	*/
	static int __init early_mem(char *p)
	{
	memory_size = memparse(p, &p);

	if (memory_size == 0)
	panic("Memory size not known\n");

	return 0;
	}
	early_param("mem", early_mem);

	/*
	* architecture specific setup
	*/
	void __init setup_arch(char **cmdline_p)
	{
	unsigned long bootmap_size;
	unsigned long kstart_pfn, start_pfn, free_pfn, end_pfn;

	cpu_init();
	unit_setup();
	smp_init_cpus();

	/* save unparsed command line copy for /proc/cmdline */
	strlcpy(boot_command_line, redboot_command_line, COMMAND_LINE_SIZE);

	/* populate cmd_line too for later use, preserving boot_command_line */
	strlcpy(cmd_line, boot_command_line, COMMAND_LINE_SIZE);
	*cmdline_p = cmd_line;

	parse_early_param();

	memory_end = (unsigned long) CONFIG_KERNEL_RAM_BASE_ADDRESS +
	memory_size;
	if (memory_end > phys_memory_end)
	memory_end = phys_memory_end;

	init_mm.start_code = (unsigned long)&_text;
	init_mm.end_code = (unsigned long) &_etext;
	init_mm.end_data = (unsigned long) &_edata;
	init_mm.brk = (unsigned long) &_end;

	code_resource.start = virt_to_bus(&_text);
	code_resource.end = virt_to_bus(&_etext)-1;
	data_resource.start = virt_to_bus(&_etext);
	data_resource.end = virt_to_bus(&_edata)-1;

	start_pfn = (CONFIG_KERNEL_RAM_BASE_ADDRESS >> PAGE_SHIFT);
	kstart_pfn = PFN_UP(__pa(&_text));
	free_pfn = PFN_UP(__pa(&_end));
	end_pfn = PFN_DOWN(__pa(memory_end));

	bootmap_size = init_bootmem_node(&contig_page_data,
	free_pfn,
	start_pfn,
	end_pfn);

	if (kstart_pfn > start_pfn)
	free_bootmem(PFN_PHYS(start_pfn),
	PFN_PHYS(kstart_pfn - start_pfn));

	free_bootmem(PFN_PHYS(free_pfn),
	PFN_PHYS(end_pfn - free_pfn));

	/* If interrupt vector table is in main ram, then we need to
	reserve the page it is occupying. */
	if (CONFIG_INTERRUPT_VECTOR_BASE >= CONFIG_KERNEL_RAM_BASE_ADDRESS &&
	CONFIG_INTERRUPT_VECTOR_BASE < memory_end)
	reserve_bootmem(CONFIG_INTERRUPT_VECTOR_BASE, PAGE_SIZE,
	BOOTMEM_DEFAULT);

	reserve_bootmem(PAGE_ALIGN(PFN_PHYS(free_pfn)), bootmap_size,
	BOOTMEM_DEFAULT);

	#ifdef CONFIG_VT
	#if defined(CONFIG_VGA_CONSOLE)
	conswitchp = &vga_con;
	#elif defined(CONFIG_DUMMY_CONSOLE)
	conswitchp = &dummy_con;
	#endif
	#endif

	paging_init();
	}

	/*
	* perform CPU initialisation
	*/
	void __init cpu_init(void)
	{
	unsigned long cpurev = CPUREV, type;

	type = (CPUREV & CPUREV_TYPE) >> CPUREV_TYPE_S;
	if (type > mn10300_known_cpus)
	type = mn10300_known_cpus;

	printk(KERN_INFO "Panasonic %s, rev %ld\n",
	mn10300_cputypes[type],
	(cpurev & CPUREV_REVISION) >> CPUREV_REVISION_S);

	get_mem_info(&phys_memory_base, &memory_size);
	phys_memory_end = phys_memory_base + memory_size;

	fpu_init_state();
	}

	static struct cpu cpu_devices[NR_CPUS];

	static int __init topology_init(void)
	{
	int i;

	for_each_present_cpu(i)
	register_cpu(&cpu_devices[i], i);

	return 0;
	}

	subsys_initcall(topology_init);

	/*
	* Get CPU information for use by the procfs.
	*/
	static int show_cpuinfo(struct seq_file m, void v)
	{
	#ifdef CONFIG_SMP
	struct mn10300_cpuinfo *c = v;
	unsigned long cpu_id = c - cpu_data;
	unsigned long cpurev = c->type, type, icachesz, dcachesz;
	#else /* CONFIG_SMP */
	unsigned long cpu_id = 0;
	unsigned long cpurev = CPUREV, type, icachesz, dcachesz;
	#endif /* CONFIG_SMP */

	#ifdef CONFIG_SMP
	if (!cpu_online(cpu_id))
	return 0;
	#endif

	type = (cpurev & CPUREV_TYPE) >> CPUREV_TYPE_S;
	if (type > mn10300_known_cpus)
	type = mn10300_known_cpus;

	icachesz =
	((cpurev & CPUREV_ICWAY ) >> CPUREV_ICWAY_S) *
	((cpurev & CPUREV_ICSIZE) >> CPUREV_ICSIZE_S) *
	1024;

	dcachesz =
	((cpurev & CPUREV_DCWAY ) >> CPUREV_DCWAY_S) *
	((cpurev & CPUREV_DCSIZE) >> CPUREV_DCSIZE_S) *
	1024;

	seq_printf(m,
	"processor : %ld\n"
	"vendor_id : " PROCESSOR_VENDOR_NAME "\n"
	"cpu core : %s\n"
	"cpu rev : %lu\n"
	"model name : " PROCESSOR_MODEL_NAME "\n"
	"icache size: %lu\n"
	"dcache size: %lu\n",
	cpu_id,
	mn10300_cputypes[type],
	(cpurev & CPUREV_REVISION) >> CPUREV_REVISION_S,
	icachesz,
	dcachesz
	);

	seq_printf(m,
	"ioclk speed: %lu.%02luMHz\n"
	"bogomips : %lu.%02lu\n\n",
	MN10300_IOCLK / 1000000,
	(MN10300_IOCLK / 10000) % 100,
	#ifdef CONFIG_SMP
	c->loops_per_jiffy / (500000 / HZ),
	(c->loops_per_jiffy / (5000 / HZ)) % 100
	#else /* CONFIG_SMP */
	loops_per_jiffy / (500000 / HZ),
	(loops_per_jiffy / (5000 / HZ)) % 100
	#endif /* CONFIG_SMP */
	);

	return 0;
	}

	static void c_start(struct seq_file m, loff_t *pos)
	{
	return pos < NR_CPUS ? cpu_data + pos : 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,
	};