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authorMichal Simek <monstr@monstr.eu>2009-03-27 14:25:24 +0100
committerMichal Simek <monstr@monstr.eu>2009-03-27 14:25:24 +0100
commitec9f91018408617d32dc189cc5e6d030351270c5 (patch)
tree3ef0ade77ae990038475b83bad4455cd51f84d15 /arch/microblaze/kernel/setup.c
parentecc6dfc8adfc76d323c513bc88cb260344c11139 (diff)
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>
Diffstat (limited to 'arch/microblaze/kernel/setup.c')
-rw-r--r--arch/microblaze/kernel/setup.c199
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)
+ ;
+}