summaryrefslogtreecommitdiffstats
path: root/arch/score/kernel/setup.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/score/kernel/setup.c')
-rw-r--r--arch/score/kernel/setup.c159
1 files changed, 159 insertions, 0 deletions
diff --git a/arch/score/kernel/setup.c b/arch/score/kernel/setup.c
new file mode 100644
index 000000000000..6a2503c75c4e
--- /dev/null
+++ b/arch/score/kernel/setup.c
@@ -0,0 +1,159 @@
+/*
+ * 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/mm.h>
+#include <linux/seq_file.h>
+#include <linux/screen_info.h>
+
+#include <asm-generic/sections.h>
+#include <asm/setup.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 start_pfn, bootmap_size;
+ unsigned long size = initrd_end - initrd_start;
+
+ start_pfn = PFN_UP(__pa(&_end));
+
+ min_low_pfn = PFN_UP(MEMORY_START);
+ max_low_pfn = PFN_UP(MEMORY_START + MEMORY_SIZE);
+
+ /* Initialize the boot-time allocator with low memory only. */
+ bootmap_size = init_bootmem_node(NODE_DATA(0), start_pfn,
+ min_low_pfn, max_low_pfn);
+ add_active_range(0, min_low_pfn, max_low_pfn);
+
+ free_bootmem(PFN_PHYS(start_pfn),
+ (max_low_pfn - start_pfn) << PAGE_SHIFT);
+ memory_present(0, start_pfn, max_low_pfn);
+
+ /* Reserve space for the bootmem bitmap. */
+ reserve_bootmem(PFN_PHYS(start_pfn), 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 = __pa(&_text);
+ code_resource.end = __pa(&_etext) - 1;
+ data_resource.start = __pa(&_etext);
+ data_resource.end = __pa(&_edata) - 1;
+
+ res = alloc_bootmem(sizeof(struct resource));
+ res->name = "System RAM";
+ res->start = MEMORY_START;
+ res->end = MEMORY_START + MEMORY_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);