1 files changed, 166 insertions, 0 deletions

diff --git a/arch/arc/kernel/setup.c b/arch/arc/kernel/setup.c
new file mode 100644
index 000000000000..82ac20603398
--- /dev/null
+++ b/arch/arc/kernel/setup.c
@@ -0,0 +1,166 @@
+/*
+ * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/seq_file.h>
+#include <linux/fs.h>
+#include <linux/delay.h>
+#include <linux/root_dev.h>
+#include <linux/console.h>
+#include <linux/module.h>
+#include <linux/cpu.h>
+#include <asm/arcregs.h>
+#include <asm/tlb.h>
+#include <asm/cache.h>
+#include <asm/setup.h>
+#include <asm/page.h>
+#include <asm/irq.h>
+#include <asm/arcregs.h>
+
+#define FIX_PTR(x)  __asm__ __volatile__(";" : "+r"(x))
+
+int running_on_hw = 1;  /* vs. on ISS */
+
+char __initdata command_line[COMMAND_LINE_SIZE];
+
+struct task_struct *_current_task[NR_CPUS];     /* For stack switching */
+
+struct cpuinfo_arc cpuinfo_arc700[NR_CPUS];
+
+void __init read_arc_build_cfg_regs(void)
+{
+        read_decode_mmu_bcr();
+        read_decode_cache_bcr();
+}
+
+/*
+ * Initialize and setup the processor core
+ * This is called by all the CPUs thus should not do special case stuff
+ *    such as only for boot CPU etc
+ */
+
+void __init setup_processor(void)
+{
+        read_arc_build_cfg_regs();
+        arc_init_IRQ();
+        arc_mmu_init();
+        arc_cache_init();
+}
+
+void __init __attribute__((weak)) arc_platform_early_init(void)
+{
+}
+
+void __init setup_arch(char **cmdline_p)
+{
+#ifdef CONFIG_CMDLINE_UBOOT
+        /* Make sure that a whitespace is inserted before */
+        strlcat(command_line, " ", sizeof(command_line));
+#endif
+        /*
+         * Append .config cmdline to base command line, which might already
+         * contain u-boot "bootargs" (handled by head.S, if so configured)
+         */
+        strlcat(command_line, CONFIG_CMDLINE, sizeof(command_line));
+
+        /* Save unparsed command line copy for /proc/cmdline */
+        strlcpy(boot_command_line, command_line, COMMAND_LINE_SIZE);
+        *cmdline_p = command_line;
+
+        /* To force early parsing of things like mem=xxx */
+        parse_early_param();
+
+        /* Platform/board specific: e.g. early console registration */
+        arc_platform_early_init();
+
+        setup_processor();
+
+        setup_arch_memory();
+
+        /* Can be issue if someone passes cmd line arg "ro"
+         * But that is unlikely so keeping it as it is
+         */
+        root_mountflags &= ~MS_RDONLY;
+
+        console_verbose();
+
+#if defined(CONFIG_VT) && defined(CONFIG_DUMMY_CONSOLE)
+        conswitchp = &dummy_con;
+#endif
+
+}
+
+/*
+ *  Get CPU information for use by the procfs.
+ */
+
+#define cpu_to_ptr(c)   ((void *)(0xFFFF0000 | (unsigned int)(c)))
+#define ptr_to_cpu(p)   (~0xFFFF0000UL & (unsigned int)(p))
+
+static int show_cpuinfo(struct seq_file *m, void *v)
+{
+        char *str;
+        int cpu_id = ptr_to_cpu(v);
+
+        str = (char *)__get_free_page(GFP_TEMPORARY);
+        if (!str)
+                goto done;
+
+        seq_printf(m, "ARC700 #%d\n", cpu_id);
+
+        seq_printf(m, "Bogo MIPS : \t%lu.%02lu\n",
+                   loops_per_jiffy / (500000 / HZ),
+                   (loops_per_jiffy / (5000 / HZ)) % 100);
+
+        free_page((unsigned long)str);
+done:
+        seq_printf(m, "\n\n");
+
+        return 0;
+}
+
+static void *c_start(struct seq_file *m, loff_t *pos)
+{
+        /*
+         * Callback returns cpu-id to iterator for show routine, NULL to stop.
+         * However since NULL is also a valid cpu-id (0), we use a round-about
+         * way to pass it w/o having to kmalloc/free a 2 byte string.
+         * Encode cpu-id as 0xFFcccc, which is decoded by show routine.
+         */
+        return *pos < num_possible_cpus() ? cpu_to_ptr(*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)
+{
+}
+
+const struct seq_operations cpuinfo_op = {
+        .start  = c_start,
+        .next   = c_next,
+        .stop   = c_stop,
+        .show   = show_cpuinfo
+};
+
+static DEFINE_PER_CPU(struct cpu, cpu_topology);
+
+static int __init topology_init(void)
+{
+        int cpu;
+
+        for_each_present_cpu(cpu)
+            register_cpu(&per_cpu(cpu_topology, cpu), cpu);
+
+        return 0;
+}
+
+subsys_initcall(topology_init);