score: Add support for Sunplus S+core architecture

This is the complete set of new arch Score's files for linux.
Score instruction set support 16bits, 32bits and 64bits instruction,
Score SOC had been used in game machine and LCD TV.

Signed-off-by: Chen Liqin <liqin.chen@sunplusct.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

1 files changed, 157 insertions, 0 deletions

diff --git a/arch/score/kernel/setup.c b/arch/score/kernel/setup.c
new file mode 100644
index 00000000000..a172ce170f6
--- /dev/null
+++ b/arch/score/kernel/setup.c
@@ -0,0 +1,157 @@
+/*
+ * arch/score/kernel/setup.c
+ *
+ * Score Processor version.
+ *
+ * Copyright (C) 2009 Sunplus Core Technology Co., Ltd.
+ *  Chen Liqin <liqin.chen@sunplusct.com>
+ *  Lennox Wu <lennox.wu@sunplusct.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, 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 License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see the file COPYING, or write
+ * to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#include <linux/bootmem.h>
+#include <linux/initrd.h>
+#include <linux/ioport.h>
+#include <linux/seq_file.h>
+#include <linux/screen_info.h>
+
+#include <asm-generic/sections.h>
+
+struct screen_info screen_info;
+unsigned long kernelsp;
+
+static char command_line[COMMAND_LINE_SIZE];
+static struct resource code_resource = { .name = "Kernel code",};
+static struct resource data_resource = { .name = "Kernel data",};
+
+static void __init bootmem_init(void)
+{
+	unsigned long reserved_end, bootmap_size;
+	unsigned long size = initrd_end - initrd_start;
+
+	reserved_end = (unsigned long)_end;
+
+	min_low_pfn = 0;
+	max_low_pfn = MEM_SIZE / PAGE_SIZE;
+
+	/* Initialize the boot-time allocator with low memory only. */
+	bootmap_size = init_bootmem_node(NODE_DATA(0), reserved_end,
+					 min_low_pfn, max_low_pfn);
+	add_active_range(0, min_low_pfn, max_low_pfn);
+
+	free_bootmem(PFN_PHYS(reserved_end),
+		     (max_low_pfn - reserved_end) << PAGE_SHIFT);
+	memory_present(0, reserved_end, max_low_pfn);
+
+	/* Reserve space for the bootmem bitmap. */
+	reserve_bootmem(PFN_PHYS(reserved_end), bootmap_size, BOOTMEM_DEFAULT);
+
+	if (size == 0) {
+		printk(KERN_INFO "Initrd not found or empty");
+		goto disable;
+	}
+
+	if (__pa(initrd_end) > PFN_PHYS(max_low_pfn)) {
+		printk(KERN_ERR "Initrd extends beyond end of memory");
+		goto disable;
+	}
+
+	/* Reserve space for the initrd bitmap. */
+	reserve_bootmem(__pa(initrd_start), size, BOOTMEM_DEFAULT);
+	initrd_below_start_ok = 1;
+
+	pr_info("Initial ramdisk at: 0x%lx (%lu bytes)\n",
+		 initrd_start, size);
+	return;
+disable:
+	printk(KERN_CONT " - disabling initrd\n");
+	initrd_start = 0;
+	initrd_end = 0;
+}
+
+static void __init resource_init(void)
+{
+	struct resource *res;
+
+	code_resource.start = (unsigned long)_text;
+	code_resource.end = (unsigned long)_etext - 1;
+	data_resource.start = (unsigned long)_etext;
+	data_resource.end = (unsigned long)_edata - 1;
+
+	res = alloc_bootmem(sizeof(struct resource));
+	res->name = "System RAM";
+	res->start = 0;
+	res->end = MEM_SIZE - 1;
+	res->flags = IORESOURCE_MEM | IORESOURCE_BUSY;
+	request_resource(&iomem_resource, res);
+
+	request_resource(res, &code_resource);
+	request_resource(res, &data_resource);
+}
+
+void __init setup_arch(char **cmdline_p)
+{
+	randomize_va_space = 0;
+	*cmdline_p = command_line;
+
+	cpu_cache_init();
+	tlb_init();
+	bootmem_init();
+	paging_init();
+	resource_init();
+}
+
+static int show_cpuinfo(struct seq_file *m, void *v)
+{
+	unsigned long n = (unsigned long) v - 1;
+
+	seq_printf(m, "processor\t\t: %ld\n", n);
+	seq_printf(m, "\n");
+
+	return 0;
+}
+
+static void *c_start(struct seq_file *m, loff_t *pos)
+{
+	unsigned long i = *pos;
+
+	return i < 1 ? (void *) (i + 1) : 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,
+};
+
+static int __init topology_init(void)
+{
+	return 0;
+}
+
+subsys_initcall(topology_init);