microblaze_v8: setup.c, setup.h - system setting

Reviewed-by: Ingo Molnar <mingo@elte.hu>
Reviewed-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com>
Acked-by: John Linn <john.linn@xilinx.com>
Acked-by: John Williams <john.williams@petalogix.com>
Signed-off-by: Michal Simek <monstr@monstr.eu>

1 files changed, 199 insertions, 0 deletions

diff --git a/arch/microblaze/kernel/setup.c b/arch/microblaze/kernel/setup.c
new file mode 100644
index 000000000000..eb6b41758e23
--- /dev/null
+++ b/arch/microblaze/kernel/setup.c
@@ -0,0 +1,199 @@
+/*
+ * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu>
+ * Copyright (C) 2007-2009 PetaLogix
+ * Copyright (C) 2006 Atmark Techno, Inc.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+
+#include <linux/init.h>
+#include <linux/string.h>
+#include <linux/seq_file.h>
+#include <linux/cpu.h>
+#include <linux/initrd.h>
+#include <linux/console.h>
+#include <linux/debugfs.h>
+
+#include <asm/setup.h>
+#include <asm/sections.h>
+#include <asm/page.h>
+#include <linux/io.h>
+#include <linux/bug.h>
+#include <linux/param.h>
+#include <linux/cache.h>
+#include <asm/cacheflush.h>
+#include <asm/entry.h>
+#include <asm/cpuinfo.h>
+
+#include <asm/system.h>
+#include <asm/prom.h>
+#include <asm/pgtable.h>
+
+DEFINE_PER_CPU(unsigned int, KSP);      /* Saved kernel stack pointer */
+DEFINE_PER_CPU(unsigned int, KM);       /* Kernel/user mode */
+DEFINE_PER_CPU(unsigned int, ENTRY_SP); /* Saved SP on kernel entry */
+DEFINE_PER_CPU(unsigned int, R11_SAVE); /* Temp variable for entry */
+DEFINE_PER_CPU(unsigned int, CURRENT_SAVE);     /* Saved current pointer */
+
+unsigned int boot_cpuid;
+char cmd_line[COMMAND_LINE_SIZE];
+
+void __init setup_arch(char **cmdline_p)
+{
+#ifdef CONFIG_CMDLINE_FORCE
+        strlcpy(cmd_line, CONFIG_CMDLINE, COMMAND_LINE_SIZE);
+        strlcpy(boot_command_line, CONFIG_CMDLINE, COMMAND_LINE_SIZE);
+#endif
+        *cmdline_p = cmd_line;
+
+        console_verbose();
+
+        unflatten_device_tree();
+
+        /* NOTE I think that this function is not necessary to call */
+        /* irq_early_init(); */
+        setup_cpuinfo();
+
+        __invalidate_icache_all();
+        __enable_icache();
+
+        __invalidate_dcache_all();
+        __enable_dcache();
+
+        panic_timeout = 120;
+
+        setup_memory();
+
+#if defined(CONFIG_SELFMOD_INTC) || defined(CONFIG_SELFMOD_TIMER)
+        printk(KERN_NOTICE "Self modified code enable\n");
+#endif
+
+#ifdef CONFIG_VT
+#if defined(CONFIG_XILINX_CONSOLE)
+        conswitchp = &xil_con;
+#elif defined(CONFIG_DUMMY_CONSOLE)
+        conswitchp = &dummy_con;
+#endif
+#endif
+}
+
+#ifdef CONFIG_MTD_UCLINUX
+/* Handle both romfs and cramfs types, without generating unnecessary
+ code (ie no point checking for CRAMFS if it's not even enabled) */
+inline unsigned get_romfs_len(unsigned *addr)
+{
+#ifdef CONFIG_ROMFS_FS
+        if (memcmp(&addr[0], "-rom1fs-", 8) == 0) /* romfs */
+                return be32_to_cpu(addr[2]);
+#endif
+
+#ifdef CONFIG_CRAMFS
+        if (addr[0] == le32_to_cpu(0x28cd3d45)) /* cramfs */
+                return le32_to_cpu(addr[1]);
+#endif
+        return 0;
+}
+#endif  /* CONFIG_MTD_UCLINUX_EBSS */
+
+void __init machine_early_init(const char *cmdline, unsigned int ram,
+                unsigned int fdt)
+{
+        unsigned long *src, *dst = (unsigned long *)0x0;
+
+/* clearing bss section */
+        memset(__bss_start, 0, __bss_stop-__bss_start);
+        memset(_ssbss, 0, _esbss-_ssbss);
+
+        /*
+         * Copy command line passed from bootloader, or use default
+         * if none provided, or forced
+         */
+#ifndef CONFIG_CMDLINE_BOOL
+        if (cmdline && cmdline[0] != '\0')
+                strlcpy(cmd_line, cmdline, COMMAND_LINE_SIZE);
+#endif
+
+/* initialize device tree for usage in early_printk */
+        early_init_devtree((void *)_fdt_start);
+
+#ifdef CONFIG_EARLY_PRINTK
+        setup_early_printk(NULL);
+#endif
+
+        early_printk("Ramdisk addr 0x%08x, FDT 0x%08x\n", ram, fdt);
+        printk(KERN_NOTICE "Found FDT at 0x%08x\n", fdt);
+
+#ifdef CONFIG_MTD_UCLINUX
+        {
+                int size;
+                unsigned int romfs_base;
+                romfs_base = (ram ? ram : (unsigned int)&__init_end);
+                /* if CONFIG_MTD_UCLINUX_EBSS is defined, assume ROMFS is at the
+                 * end of kernel, which is ROMFS_LOCATION defined above. */
+                size = PAGE_ALIGN(get_romfs_len((unsigned *)romfs_base));
+                early_printk("Found romfs @ 0x%08x (0x%08x)\n",
+                                romfs_base, size);
+                early_printk("#### klimit %p ####\n", klimit);
+                BUG_ON(size < 0); /* What else can we do? */
+
+                /* Use memmove to handle likely case of memory overlap */
+                early_printk("Moving 0x%08x bytes from 0x%08x to 0x%08x\n",
+                        size, romfs_base, (unsigned)&_ebss);
+                memmove(&_ebss, (int *)romfs_base, size);
+
+                /* update klimit */
+                klimit += PAGE_ALIGN(size);
+                early_printk("New klimit: 0x%08x\n", (unsigned)klimit);
+        }
+#endif
+
+        for (src = __ivt_start; src < __ivt_end; src++, dst++)
+                *dst = *src;
+
+        /* Initialize global data */
+        per_cpu(KM, 0) = 0x1;   /* We start in kernel mode */
+        per_cpu(CURRENT_SAVE, 0) = (unsigned long)current;
+}
+
+#ifdef CONFIG_DEBUG_FS
+struct dentry *of_debugfs_root;
+
+static int microblaze_debugfs_init(void)
+{
+        of_debugfs_root = debugfs_create_dir("microblaze", NULL);
+
+        return of_debugfs_root == NULL;
+}
+arch_initcall(microblaze_debugfs_init);
+#endif
+
+void machine_restart(char *cmd)
+{
+        printk(KERN_NOTICE "Machine restart...\n");
+        dump_stack();
+        while (1)
+                ;
+}
+
+void machine_shutdown(void)
+{
+        printk(KERN_NOTICE "Machine shutdown...\n");
+        while (1)
+                ;
+}
+
+void machine_halt(void)
+{
+        printk(KERN_NOTICE "Machine halt...\n");
+        while (1)
+                ;
+}
+
+void machine_power_off(void)
+{
+        printk(KERN_NOTICE "Machine power off...\n");
+        while (1)
+                ;
+}