Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu

Pull m68knommu updates from Greg Ungerer:
 "The bulk of the changes here are to clean up the ColdFire 5441x SoC
  support so that it can run with MMU enabled. We have only supported it
  with MMU disabled up to now.

  There is also a few individual bug fixes across the ColdFire support
  code"

* 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu:
  m68k: let clk_disable() return immediately if clk is NULL
  m68knommu: convert printk(KERN_INFO) to pr_info()
  m68knommu: clean up uClinux boot log output
  m68k: generalize uboot command line support
  m68k: don't panic if no hardware FPU defined
  m68k: only generate FPU instructions if CONFIG_FPU enabled
  m68k: always make available dump_fpu()
  m68k: generalize io memory region setup for ColdFire ACR registers
  m68k: move ColdFire _bootmem_alloc code
  m68k: report correct FPU type on ColdFire MMU platforms
  m68k: set appropriate machine type for m5411x SoC platforms
  m68k: move CONFIG_FPU set to per-CPU configuration
  m68knommu: fix IO write size in nettel pin set
  m68knommu: switch to using IO access methods in WildFire board code
  m68knommu: fix early setup to not access variables

1 files changed, 107 insertions, 0 deletions

diff --git a/arch/m68k/kernel/uboot.c b/arch/m68k/kernel/uboot.c
new file mode 100644
index 000000000000..b3536a82a262
--- /dev/null
+++ b/arch/m68k/kernel/uboot.c
@@ -0,0 +1,107 @@
+/*
+ * uboot.c -- uboot arguments support
+ *
+ * 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/kernel.h>
+#include <linux/sched.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/fb.h>
+#include <linux/module.h>
+#include <linux/mm.h>
+#include <linux/console.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/bootmem.h>
+#include <linux/seq_file.h>
+#include <linux/init.h>
+#include <linux/initrd.h>
+#include <linux/root_dev.h>
+#include <linux/rtc.h>
+
+#include <asm/setup.h>
+#include <asm/irq.h>
+#include <asm/machdep.h>
+#include <asm/pgtable.h>
+#include <asm/sections.h>
+
+/*
+ * parse_uboot_commandline
+ *
+ * Copies u-boot commandline arguments and store them in the proper linux
+ * variables.
+ *
+ * Assumes:
+ *	_init_sp global contains the address in the stack pointer when the
+ *	kernel starts (see head.S::_start)
+ *
+ *	U-Boot calling convention:
+ *	(*kernel) (kbd, initrd_start, initrd_end, cmd_start, cmd_end);
+ *
+ *	_init_sp can be parsed as such
+ *
+ *	_init_sp+00 = u-boot cmd after jsr into kernel (skip)
+ *	_init_sp+04 = &kernel board_info (residual data)
+ *	_init_sp+08 = &initrd_start
+ *	_init_sp+12 = &initrd_end
+ *	_init_sp+16 = &cmd_start
+ *	_init_sp+20 = &cmd_end
+ *
+ *	This also assumes that the memory locations pointed to are still
+ *	unmodified. U-boot places them near the end of external SDRAM.
+ *
+ * Argument(s):
+ *	commandp = the linux commandline arg container to fill.
+ *	size     = the sizeof commandp.
+ *
+ * Returns:
+ */
+static void __init parse_uboot_commandline(char *commandp, int size)
+{
+	extern unsigned long _init_sp;
+	unsigned long *sp;
+	unsigned long uboot_kbd;
+	unsigned long uboot_initrd_start, uboot_initrd_end;
+	unsigned long uboot_cmd_start, uboot_cmd_end;
+
+	sp = (unsigned long *)_init_sp;
+	uboot_kbd = sp[1];
+	uboot_initrd_start = sp[2];
+	uboot_initrd_end = sp[3];
+	uboot_cmd_start = sp[4];
+	uboot_cmd_end = sp[5];
+
+	if (uboot_cmd_start && uboot_cmd_end)
+		strncpy(commandp, (const char *)uboot_cmd_start, size);
+#if defined(CONFIG_BLK_DEV_INITRD)
+	if (uboot_initrd_start && uboot_initrd_end &&
+	    (uboot_initrd_end > uboot_initrd_start)) {
+		initrd_start = uboot_initrd_start;
+		initrd_end = uboot_initrd_end;
+		ROOT_DEV = Root_RAM0;
+		printk(KERN_INFO "initrd at 0x%lx:0x%lx\n",
+			initrd_start, initrd_end);
+	}
+#endif /* if defined(CONFIG_BLK_DEV_INITRD) */
+}
+
+__init void process_uboot_commandline(char *commandp, int size)
+{
+	int len, n;
+
+	n = strnlen(commandp, size);
+	commandp += n;
+	len = size - n;
+	if (len) {
+		/* Add the whitespace separator */
+		*commandp++ = ' ';
+		len--;
+	}
+
+	parse_uboot_commandline(commandp, len);
+	commandp[size - 1] = 0;
+}