Initial import

1 files changed, 283 insertions, 0 deletions

diff --git a/arch/mn10300/kernel/setup.c b/arch/mn10300/kernel/setup.c
new file mode 100644
index 000000000..2ad7f32fa
--- /dev/null
+++ b/arch/mn10300/kernel/setup.c
@@ -0,0 +1,283 @@
+/* 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,
+};