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-rw-r--r--arch/mn10300/kernel/setup.c298
1 files changed, 298 insertions, 0 deletions
diff --git a/arch/mn10300/kernel/setup.c b/arch/mn10300/kernel/setup.c
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+++ b/arch/mn10300/kernel/setup.c
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+/* 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/slab.h>
+#include <linux/user.h>
+#include <linux/a.out.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 <asm/processor.h>
+#include <linux/console.h>
+#include <asm/uaccess.h>
+#include <asm/system.h>
+#include <asm/setup.h>
+#include <asm/io.h>
+#include <asm/smp.h>
+#include <asm/proc/proc.h>
+#include <asm/busctl-regs.h>
+#include <asm/fpu.h>
+#include <asm/sections.h>
+
+struct mn10300_cpuinfo boot_cpu_data;
+
+/* For PCI or other memory-mapped resources */
+unsigned long pci_mem_start = 0x18000000;
+
+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 3
+static const char *const mn10300_cputypes[] = {
+ "am33v1",
+ "am33v2",
+ "am34v1",
+ "unknown"
+};
+
+/*
+ *
+ */
+static void __init parse_mem_cmdline(char **cmdline_p)
+{
+ char *from, *to, c;
+
+ /* save unparsed command line copy for /proc/cmdline */
+ strcpy(boot_command_line, redboot_command_line);
+
+ /* see if there's an explicit memory size option */
+ from = redboot_command_line;
+ to = redboot_command_line;
+ c = ' ';
+
+ for (;;) {
+ if (c == ' ' && !memcmp(from, "mem=", 4)) {
+ if (to != redboot_command_line)
+ to--;
+ memory_size = memparse(from + 4, &from);
+ }
+
+ c = *(from++);
+ if (!c)
+ break;
+
+ *(to++) = c;
+ }
+
+ *to = '\0';
+ *cmdline_p = redboot_command_line;
+
+ if (memory_size == 0)
+ panic("Memory size not known\n");
+
+ memory_end = (unsigned long) CONFIG_KERNEL_RAM_BASE_ADDRESS +
+ memory_size;
+ if (memory_end > phys_memory_end)
+ memory_end = phys_memory_end;
+}
+
+/*
+ * 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();
+ parse_mem_cmdline(cmdline_p);
+
+ 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;
+
+#define PFN_UP(x) (((x) + PAGE_SIZE-1) >> PAGE_SHIFT)
+#define PFN_DOWN(x) ((x) >> PAGE_SHIFT)
+#define PFN_PHYS(x) ((x) << PAGE_SHIFT)
+
+ 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, 1,
+ 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;
+ unsigned long base, size;
+
+ type = (CPUREV & CPUREV_TYPE) >> CPUREV_TYPE_S;
+ if (type > mn10300_known_cpus)
+ type = mn10300_known_cpus;
+
+ printk(KERN_INFO "Matsushita %s, rev %ld\n",
+ mn10300_cputypes[type],
+ (cpurev & CPUREV_REVISION) >> CPUREV_REVISION_S);
+
+ /* determine the memory size and base from the memory controller regs */
+ memory_size = 0;
+
+ base = SDBASE(0);
+ if (base & SDBASE_CE) {
+ size = (base & SDBASE_CBAM) << SDBASE_CBAM_SHIFT;
+ size = ~size + 1;
+ base &= SDBASE_CBA;
+
+ printk(KERN_INFO "SDRAM[0]: %luMb @%08lx\n", size >> 20, base);
+ memory_size += size;
+ phys_memory_base = base;
+ }
+
+ base = SDBASE(1);
+ if (base & SDBASE_CE) {
+ size = (base & SDBASE_CBAM) << SDBASE_CBAM_SHIFT;
+ size = ~size + 1;
+ base &= SDBASE_CBA;
+
+ printk(KERN_INFO "SDRAM[1]: %luMb @%08lx\n", size >> 20, base);
+ memory_size += size;
+ if (phys_memory_base == 0)
+ phys_memory_base = base;
+ }
+
+ phys_memory_end = phys_memory_base + memory_size;
+
+#ifdef CONFIG_FPU
+ fpu_init_state();
+#endif
+}
+
+/*
+ * Get CPU information for use by the procfs.
+ */
+static int show_cpuinfo(struct seq_file *m, void *v)
+{
+ unsigned long cpurev = CPUREV, type, icachesz, dcachesz;
+
+ 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 : 0\n"
+ "vendor_id : Matsushita\n"
+ "cpu core : %s\n"
+ "cpu rev : %lu\n"
+ "model name : " PROCESSOR_MODEL_NAME "\n"
+ "icache size: %lu\n"
+ "dcache size: %lu\n",
+ 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,
+ loops_per_jiffy / (500000 / HZ),
+ (loops_per_jiffy / (5000 / HZ)) % 100
+ );
+
+ 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)
+{
+}
+
+struct seq_operations cpuinfo_op = {
+ .start = c_start,
+ .next = c_next,
+ .stop = c_stop,
+ .show = show_cpuinfo,
+};