mn10300: add the MN10300/AM33 architecture to the kernel

Add architecture support for the MN10300/AM33 CPUs produced by MEI to the
kernel.

This patch also adds board support for the ASB2303 with the ASB2308 daughter
board, and the ASB2305.  The only processor supported is the MN103E010, which
is an AM33v2 core plus on-chip devices.

[akpm@linux-foundation.org: nuke cvs control strings]
Signed-off-by: Masakazu Urade <urade.masakazu@jp.panasonic.com>
Signed-off-by: Koichi Yasutake <yasutake.koichi@jp.panasonic.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 298 insertions, 0 deletions

diff --git a/arch/mn10300/kernel/setup.c b/arch/mn10300/kernel/setup.c
new file mode 100644
index 000000000000..6b7ce2636851
--- /dev/null
+++ b/arch/mn10300/kernel/setup.c
@@ -0,0 +1,298 @@
+/* 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,
+};