m68k: generalize uboot command line support

The uboot command line support needs to be used by both MMU and no-MMU
setups, but currently we only have the code in the no-MMU code paths.
Move the uboot command line processing code into its own file. Add
appropriate calls to it from both the MMU and no-MMU arch setup code.

Signed-off-by: Greg Ungerer <gerg@linux-m68k.org>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>

4 files changed, 111 insertions, 79 deletions

diff --git a/arch/m68k/kernel/Makefile b/arch/m68k/kernel/Makefile
index e47778f8588d..8a1c4d3f91c8 100644
--- a/arch/m68k/kernel/Makefile
+++ b/arch/m68k/kernel/Makefile
@@ -24,6 +24,7 @@ obj-$(CONFIG_HAS_DMA)	+= dma.o
 
 obj-$(CONFIG_KEXEC)             += machine_kexec.o relocate_kernel.o
 obj-$(CONFIG_BOOTINFO_PROC)     += bootinfo_proc.o
+obj-$(CONFIG_UBOOT)             += uboot.o
 
 obj-$(CONFIG_EARLY_PRINTK)      += early_printk.o
 
diff --git a/arch/m68k/kernel/setup_mm.c b/arch/m68k/kernel/setup_mm.c
index 9afad2b64c13..9f61f517f810 100644
--- a/arch/m68k/kernel/setup_mm.c
+++ b/arch/m68k/kernel/setup_mm.c
@@ -274,6 +274,7 @@ void __init setup_arch(char **cmdline_p)
         strncpy(m68k_command_line, CONFIG_BOOTPARAM_STRING, CL_SIZE);
         m68k_command_line[CL_SIZE - 1] = 0;
 #endif /* CONFIG_BOOTPARAM */
+        process_uboot_commandline(&m68k_command_line[0], CL_SIZE);
         *cmdline_p = m68k_command_line;
         memcpy(boot_command_line, *cmdline_p, CL_SIZE);
 
diff --git a/arch/m68k/kernel/setup_no.c b/arch/m68k/kernel/setup_no.c
index 9309789215a8..4bde2c1c8289 100644
--- a/arch/m68k/kernel/setup_no.c
+++ b/arch/m68k/kernel/setup_no.c
@@ -34,6 +34,7 @@
 #include <linux/rtc.h>
 
 #include <asm/setup.h>
+#include <asm/bootinfo.h>
 #include <asm/irq.h>
 #include <asm/machdep.h>
 #include <asm/pgtable.h>
@@ -82,69 +83,6 @@ void (*mach_power_off)(void);
 #define CPU_INSTR_PER_JIFFY     16
 #endif
 
-#if defined(CONFIG_UBOOT)
-/*
- * 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) */
-}
-#endif /* #if defined(CONFIG_UBOOT) */
-
 void __init setup_arch(char **cmdline_p)
 {
         int bootmap_size;
@@ -164,22 +102,7 @@ void __init setup_arch(char **cmdline_p)
         command_line[sizeof(command_line) - 1] = 0;
 #endif /* CONFIG_BOOTPARAM */
 
-#if defined(CONFIG_UBOOT)
-        /* CONFIG_UBOOT and CONFIG_BOOTPARAM defined, concatenate cmdline */
-        #if defined(CONFIG_BOOTPARAM)
-                /* Add the whitespace separator */
-                command_line[strlen(CONFIG_BOOTPARAM_STRING)] = ' ';
-                /* Parse uboot command line into the rest of the buffer */
-                parse_uboot_commandline(
-                        &command_line[(strlen(CONFIG_BOOTPARAM_STRING)+1)],
-                        (sizeof(command_line) -
-                        (strlen(CONFIG_BOOTPARAM_STRING)+1)));
-        /* Only CONFIG_UBOOT defined, create cmdline */
-        #else
-                parse_uboot_commandline(&command_line[0], sizeof(command_line));
-        #endif /* CONFIG_BOOTPARAM */
-        command_line[sizeof(command_line) - 1] = 0;
-#endif /* CONFIG_UBOOT */
+        process_uboot_commandline(&command_line[0], sizeof(command_line));
 
         printk(KERN_INFO "\x0F\r\n\nuClinux/" CPU_NAME "\n");
 
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;
+}