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, 206 insertions, 0 deletions

diff --git a/arch/mn10300/kernel/module.c b/arch/mn10300/kernel/module.c
new file mode 100644
index 000000000000..0e4d2f6fa6e8
--- /dev/null
+++ b/arch/mn10300/kernel/module.c
@@ -0,0 +1,206 @@
+/* MN10300 Kernel module helper routines
+ *
+ * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
+ * Written by Mark Salter (msalter@redhat.com)
+ * - Derived from arch/i386/kernel/module.c
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public Licence for more details.
+ *
+ * You should have received a copy of the GNU General Public Licence
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+#include <linux/moduleloader.h>
+#include <linux/elf.h>
+#include <linux/vmalloc.h>
+#include <linux/fs.h>
+#include <linux/string.h>
+#include <linux/kernel.h>
+
+#if 0
+#define DEBUGP printk
+#else
+#define DEBUGP(fmt, ...)
+#endif
+
+/*
+ * allocate storage for a module
+ */
+void *module_alloc(unsigned long size)
+{
+        if (size == 0)
+                return NULL;
+        return vmalloc_exec(size);
+}
+
+/*
+ * free memory returned from module_alloc()
+ */
+void module_free(struct module *mod, void *module_region)
+{
+        vfree(module_region);
+        /* FIXME: If module_region == mod->init_region, trim exception
+         * table entries. */
+}
+
+/*
+ * allow the arch to fix up the section table
+ * - we don't need anything special
+ */
+int module_frob_arch_sections(Elf_Ehdr *hdr,
+                              Elf_Shdr *sechdrs,
+                              char *secstrings,
+                              struct module *mod)
+{
+        return 0;
+}
+
+static uint32_t reloc_get16(uint8_t *p)
+{
+        return p[0] | (p[1] << 8);
+}
+
+static uint32_t reloc_get24(uint8_t *p)
+{
+        return reloc_get16(p) | (p[2] << 16);
+}
+
+static uint32_t reloc_get32(uint8_t *p)
+{
+        return reloc_get16(p) | (reloc_get16(p+2) << 16);
+}
+
+static void reloc_put16(uint8_t *p, uint32_t val)
+{
+        p[0] = val & 0xff;
+        p[1] = (val >> 8) & 0xff;
+}
+
+static void reloc_put24(uint8_t *p, uint32_t val)
+{
+        reloc_put16(p, val);
+        p[2] = (val >> 16) & 0xff;
+}
+
+static void reloc_put32(uint8_t *p, uint32_t val)
+{
+        reloc_put16(p, val);
+        reloc_put16(p+2, val >> 16);
+}
+
+/*
+ * apply a REL relocation
+ */
+int apply_relocate(Elf32_Shdr *sechdrs,
+                   const char *strtab,
+                   unsigned int symindex,
+                   unsigned int relsec,
+                   struct module *me)
+{
+        printk(KERN_ERR "module %s: RELOCATION unsupported\n",
+               me->name);
+        return -ENOEXEC;
+}
+
+/*
+ * apply a RELA relocation
+ */
+int apply_relocate_add(Elf32_Shdr *sechdrs,
+                       const char *strtab,
+                       unsigned int symindex,
+                       unsigned int relsec,
+                       struct module *me)
+{
+        unsigned int i;
+        Elf32_Rela *rel = (void *)sechdrs[relsec].sh_addr;
+        Elf32_Sym *sym;
+        Elf32_Addr relocation;
+        uint8_t *location;
+        uint32_t value;
+
+        DEBUGP("Applying relocate section %u to %u\n",
+               relsec, sechdrs[relsec].sh_info);
+
+        for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) {
+                /* this is where to make the change */
+                location = (void *)sechdrs[sechdrs[relsec].sh_info].sh_addr
+                        + rel[i].r_offset;
+
+                /* this is the symbol the relocation is referring to (note that
+                 * all undefined symbols have been resolved by the caller) */
+                sym = (Elf32_Sym *)sechdrs[symindex].sh_addr
+                        + ELF32_R_SYM(rel[i].r_info);
+
+                /* this is the adjustment to be made */
+                relocation = sym->st_value + rel[i].r_addend;
+
+                switch (ELF32_R_TYPE(rel[i].r_info)) {
+                        /* for the first four relocation types, we add the
+                         * adjustment into the value at the location given */
+                case R_MN10300_32:
+                        value = reloc_get32(location);
+                        value += relocation;
+                        reloc_put32(location, value);
+                        break;
+                case R_MN10300_24:
+                        value = reloc_get24(location);
+                        value += relocation;
+                        reloc_put24(location, value);
+                        break;
+                case R_MN10300_16:
+                        value = reloc_get16(location);
+                        value += relocation;
+                        reloc_put16(location, value);
+                        break;
+                case R_MN10300_8:
+                        *location += relocation;
+                        break;
+
+                        /* for the next three relocation types, we write the
+                         * adjustment with the address subtracted over the
+                         * value at the location given */
+                case R_MN10300_PCREL32:
+                        value = relocation - (uint32_t) location;
+                        reloc_put32(location, value);
+                        break;
+                case R_MN10300_PCREL16:
+                        value = relocation - (uint32_t) location;
+                        reloc_put16(location, value);
+                        break;
+                case R_MN10300_PCREL8:
+                        *location = relocation - (uint32_t) location;
+                        break;
+
+                default:
+                        printk(KERN_ERR "module %s: Unknown relocation: %u\n",
+                               me->name, ELF32_R_TYPE(rel[i].r_info));
+                        return -ENOEXEC;
+                }
+        }
+        return 0;
+}
+
+/*
+ * finish loading the module
+ */
+int module_finalize(const Elf_Ehdr *hdr,
+                    const Elf_Shdr *sechdrs,
+                    struct module *me)
+{
+        return 0;
+}
+
+/*
+ * finish clearing the module
+ */
+void module_arch_cleanup(struct module *mod)
+{
+}