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

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu:
  m68knommu: export clk_* symbols in clk.c
  m68knommu: Split the .init section into INIT_TEXT_SECTION and INIT_DATA_SECTION.
  m68knommu: Move __init_end out of the .init section.
  m68knommu: Move __init_begin out of the .init section.
  m68knommu: Use more macros inside the .init section.
  m68knommu: Use INIT_TASK_DATA and CACHELINE_ALIGNED_DATA.
  m68knommu: Make THREAD_SIZE available to assembly files.
  m68knommu: Don't hardcode the value of PAGE_SIZE in the linker script.
  m68knommu: rename BSS define in linker script
  m68knommu: add a task_pt_regs() macro
  m68knommu: define arch_has_single_step() and friends
  m68knommu: add uboot commandline argument passing support
  m68knommu: Coldfire GPIO corrections
  m68knommu: move mcf_remove to .devexit.text

Fixed up (?) conflict in arch/m68k/include/asm/ptrace.h

11 files changed, 140 insertions, 44 deletions

diff --git a/arch/m68k/include/asm/processor.h b/arch/m68k/include/asm/processor.h
index 74fd674b15ad..cbd3d4751dd2 100644
--- a/arch/m68k/include/asm/processor.h
+++ b/arch/m68k/include/asm/processor.h
@@ -165,6 +165,8 @@ unsigned long get_wchan(struct task_struct *p);
         eip; })
 #define KSTK_ESP(tsk)   ((tsk) == current ? rdusp() : (tsk)->thread.usp)
 
+#define task_pt_regs(tsk)       ((struct pt_regs *) ((tsk)->thread.esp0))
+
 #define cpu_relax()     barrier()
 
 #endif
diff --git a/arch/m68k/include/asm/ptrace.h b/arch/m68k/include/asm/ptrace.h
index a6ab663bcc2e..ee4011c23281 100644
--- a/arch/m68k/include/asm/ptrace.h
+++ b/arch/m68k/include/asm/ptrace.h
@@ -86,7 +86,7 @@ struct switch_stack {
 extern void show_regs(struct pt_regs *);
 
 /*
- * These are defined as per linux/ptrace.h, which see.
+ * These are defined as per linux/ptrace.h.
  */
 struct task_struct;
 
diff --git a/arch/m68k/include/asm/thread_info_no.h b/arch/m68k/include/asm/thread_info_no.h
index c2bde5e24b0b..a6512bfdd01d 100644
--- a/arch/m68k/include/asm/thread_info_no.h
+++ b/arch/m68k/include/asm/thread_info_no.h
@@ -12,8 +12,6 @@
 
 #ifdef __KERNEL__
 
-#ifndef __ASSEMBLY__
-
 /*
  * Size of kernel stack for each process. This must be a power of 2...
  */
@@ -28,6 +26,8 @@
  */
 #define THREAD_SIZE (PAGE_SIZE<<THREAD_SIZE_ORDER)
 
+#ifndef __ASSEMBLY__
+
 /*
  * low level task data.
  */
diff --git a/arch/m68knommu/Kconfig b/arch/m68knommu/Kconfig
index e2201b90aa22..064f5913db1a 100644
--- a/arch/m68knommu/Kconfig
+++ b/arch/m68knommu/Kconfig
@@ -533,6 +533,13 @@ config AVNET
         default y
         depends on (AVNET5282)
 
+config UBOOT
+        bool "Support for U-Boot command line parameters"
+        help
+          If you say Y here kernel will try to collect command
+          line parameters from the initial u-boot stack.
+        default n
+
 config 4KSTACKS
         bool "Use 4Kb for kernel stacks instead of 8Kb"
         default y
diff --git a/arch/m68knommu/kernel/setup.c b/arch/m68knommu/kernel/setup.c
index 5c2bb3eeaaa2..ba92b90d5fbc 100644
--- a/arch/m68knommu/kernel/setup.c
+++ b/arch/m68knommu/kernel/setup.c
@@ -29,6 +29,8 @@
 #include <linux/bootmem.h>
 #include <linux/seq_file.h>
 #include <linux/init.h>
+#include <linux/initrd.h>
+#include <linux/root_dev.h>
 
 #include <asm/setup.h>
 #include <asm/irq.h>
@@ -52,7 +54,6 @@ void (*mach_reset)(void);
 void (*mach_halt)(void);
 void (*mach_power_off)(void);
 
-
 #ifdef CONFIG_M68000
         #define CPU "MC68000"
 #endif
@@ -111,6 +112,69 @@ void (*mach_power_off)(void);
 extern int _stext, _etext, _sdata, _edata, _sbss, _ebss, _end;
 extern int _ramstart, _ramend;
 
+#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:
+ */
+void 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;
@@ -128,7 +192,24 @@ void __init setup_arch(char **cmdline_p)
 #if defined(CONFIG_BOOTPARAM)
         strncpy(&command_line[0], CONFIG_BOOTPARAM_STRING, sizeof(command_line));
         command_line[sizeof(command_line) - 1] = 0;
-#endif
+#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 */
 
         printk(KERN_INFO "\x0F\r\n\nuClinux/" CPU "\n");
 
@@ -204,6 +285,13 @@ void __init setup_arch(char **cmdline_p)
         free_bootmem(memory_start, memory_end - memory_start);
         reserve_bootmem(memory_start, bootmap_size, BOOTMEM_DEFAULT);
 
+#if defined(CONFIG_UBOOT) && defined(CONFIG_BLK_DEV_INITRD)
+        if ((initrd_start > 0) && (initrd_start < initrd_end) &&
+                        (initrd_end < memory_end))
+                reserve_bootmem(initrd_start, initrd_end - initrd_start,
+                                 BOOTMEM_DEFAULT);
+#endif /* if defined(CONFIG_BLK_DEV_INITRD) */
+
         /*
          * Get kmalloc into gear.
          */
diff --git a/arch/m68knommu/kernel/vmlinux.lds.S b/arch/m68knommu/kernel/vmlinux.lds.S
index 2736a5e309c0..9f1784f586b9 100644
--- a/arch/m68knommu/kernel/vmlinux.lds.S
+++ b/arch/m68knommu/kernel/vmlinux.lds.S
@@ -8,6 +8,8 @@
  */
 
 #include <asm-generic/vmlinux.lds.h>
+#include <asm/page.h>
+#include <asm/thread_info.h>
 
 #if defined(CONFIG_RAMKERNEL)
 #define RAM_START       CONFIG_KERNELBASE
@@ -15,7 +17,7 @@
 #define TEXT            ram
 #define DATA            ram
 #define INIT            ram
-#define BSS             ram
+#define BSSS            ram
 #endif
 #if defined(CONFIG_ROMKERNEL) || defined(CONFIG_HIMEMKERNEL)
 #define RAM_START       CONFIG_RAMBASE
@@ -27,7 +29,7 @@
 #define TEXT            rom
 #define DATA            ram
 #define INIT            ram
-#define BSS             ram
+#define BSSS            ram
 #endif
 
 #ifndef DATA_ADDR
@@ -147,40 +149,19 @@ SECTIONS {
                 . = ALIGN(4);
                 _sdata = . ;
                 DATA_DATA
-                . = ALIGN(32);
-                *(.data.cacheline_aligned)
-                . = ALIGN(8192) ;
-                *(.data.init_task)
+                CACHELINE_ALIGNED_DATA(32)
+                INIT_TASK_DATA(THREAD_SIZE)
                 _edata = . ;
         } > DATA
 
-        .init : {
-                . = ALIGN(4096);
+        .init.text : {
+                . = ALIGN(PAGE_SIZE);
                 __init_begin = .;
-                _sinittext = .;
-                INIT_TEXT
-                _einittext = .;
-                INIT_DATA
-                . = ALIGN(16);
-                __setup_start = .;
-                *(.init.setup)
-                __setup_end = .;
-                __initcall_start = .;
-                INITCALLS
-                __initcall_end = .;
-                __con_initcall_start = .;
-                *(.con_initcall.init)
-                __con_initcall_end = .;
-                __security_initcall_start = .;
-                *(.security_initcall.init)
-                __security_initcall_end = .;
-#ifdef CONFIG_BLK_DEV_INITRD
-                . = ALIGN(4);
-                __initramfs_start = .;
-                *(.init.ramfs)
-                __initramfs_end = .;
-#endif
-                . = ALIGN(4096);
+        } > INIT
+        INIT_TEXT_SECTION(PAGE_SIZE) > INIT
+        INIT_DATA_SECTION(16) > INIT
+        .init.data : {
+                . = ALIGN(PAGE_SIZE);
                 __init_end = .;
         } > INIT
 
@@ -192,7 +173,7 @@ SECTIONS {
                 . = ALIGN(4) ;
                 _ebss = . ;
                 _end = . ;
-        } > BSS
+        } > BSSS
 
         DISCARDS
 }
diff --git a/arch/m68knommu/platform/523x/gpio.c b/arch/m68knommu/platform/523x/gpio.c
index f02840d54d3c..a8842dc27839 100644
--- a/arch/m68knommu/platform/523x/gpio.c
+++ b/arch/m68knommu/platform/523x/gpio.c
@@ -30,7 +30,8 @@ static struct mcf_gpio_chip mcf_gpio_chips[] = {
                         .direction_output       = mcf_gpio_direction_output,
                         .get                    = mcf_gpio_get_value,
                         .set                    = mcf_gpio_set_value,
-                        .ngpio                  = 8,
+                        .base                   = 1,
+                        .ngpio                  = 7,
                 },
                 .pddr                           = MCFEPORT_EPDDR,
                 .podr                           = MCFEPORT_EPDR,
@@ -244,7 +245,7 @@ static struct mcf_gpio_chip mcf_gpio_chips[] = {
                         .get                    = mcf_gpio_get_value,
                         .set                    = mcf_gpio_set_value_fast,
                         .base                   = 96,
-                        .ngpio                  = 4,
+                        .ngpio                  = 8,
                 },
                 .pddr                           = MCFGPIO_PDDR_TIMER,
                 .podr                           = MCFGPIO_PODR_TIMER,
diff --git a/arch/m68knommu/platform/527x/gpio.c b/arch/m68knommu/platform/527x/gpio.c
index 1028142851ac..0b56e19db0f8 100644
--- a/arch/m68knommu/platform/527x/gpio.c
+++ b/arch/m68knommu/platform/527x/gpio.c
@@ -31,7 +31,8 @@ static struct mcf_gpio_chip mcf_gpio_chips[] = {
                         .direction_output       = mcf_gpio_direction_output,
                         .get                    = mcf_gpio_get_value,
                         .set                    = mcf_gpio_set_value,
-                        .ngpio                  = 8,
+                        .base                   = 1,
+                        .ngpio                  = 7,
                 },
                 .pddr                           = MCFEPORT_EPDDR,
                 .podr                           = MCFEPORT_EPDR,
@@ -263,7 +264,8 @@ static struct mcf_gpio_chip mcf_gpio_chips[] = {
                         .direction_output       = mcf_gpio_direction_output,
                         .get                    = mcf_gpio_get_value,
                         .set                    = mcf_gpio_set_value,
-                        .ngpio                  = 8,
+                        .base                   = 1,
+                        .ngpio                  = 7,
                 },
                 .pddr                           = MCFEPORT_EPDDR,
                 .podr                           = MCFEPORT_EPDR,
diff --git a/arch/m68knommu/platform/528x/gpio.c b/arch/m68knommu/platform/528x/gpio.c
index ec593950696a..eedaf0adbcd7 100644
--- a/arch/m68knommu/platform/528x/gpio.c
+++ b/arch/m68knommu/platform/528x/gpio.c
@@ -31,7 +31,7 @@ static struct mcf_gpio_chip mcf_gpio_chips[] = {
                         .get                    = mcf_gpio_get_value,
                         .set                    = mcf_gpio_set_value,
                         .base                   = 1,
-                        .ngpio                  = 8,
+                        .ngpio                  = 7,
                 },
                 .pddr                           = MCFEPORT_EPDDR,
                 .podr                           = MCFEPORT_EPDR,
diff --git a/arch/m68knommu/platform/coldfire/clk.c b/arch/m68knommu/platform/coldfire/clk.c
index 7cdbf445b28f..9f1260c5e2ad 100644
--- a/arch/m68knommu/platform/coldfire/clk.c
+++ b/arch/m68knommu/platform/coldfire/clk.c
@@ -9,6 +9,7 @@
 /***************************************************************************/
 
 #include <linux/kernel.h>
+#include <linux/module.h>
 #include <linux/clk.h>
 #include <asm/coldfire.h>
 
@@ -18,23 +19,27 @@ struct clk *clk_get(struct device *dev, const char *id)
 {
         return NULL;
 }
+EXPORT_SYMBOL(clk_get);
 
 int clk_enable(struct clk *clk)
 {
         return 0;
 }
+EXPORT_SYMBOL(clk_enable);
 
 void clk_disable(struct clk *clk)
 {
 }
+EXPORT_SYMBOL(clk_disable);
 
 void clk_put(struct clk *clk)
 {
 }
+EXPORT_SYMBOL(clk_put);
 
 unsigned long clk_get_rate(struct clk *clk)
 {
         return MCF_CLK;
 }
-
+EXPORT_SYMBOL(clk_get_rate);
 /***************************************************************************/
diff --git a/arch/m68knommu/platform/coldfire/head.S b/arch/m68knommu/platform/coldfire/head.S
index 2b0d73c0cc32..4b91aa24eb00 100644
--- a/arch/m68knommu/platform/coldfire/head.S
+++ b/arch/m68knommu/platform/coldfire/head.S
@@ -106,6 +106,9 @@
 .global _ramvec
 .global _ramstart
 .global _ramend
+#if defined(CONFIG_UBOOT)
+.global _init_sp
+#endif
 
 /*****************************************************************************/
 
@@ -124,6 +127,10 @@ _ramstart:
 .long   0
 _ramend:
 .long   0
+#if defined(CONFIG_UBOOT)
+_init_sp:
+.long   0
+#endif
 
 /*****************************************************************************/
 
@@ -137,6 +144,9 @@ __HEAD
 _start:
         nop                                     /* filler */
         movew   #0x2700, %sr                    /* no interrupts */
+#if defined(CONFIG_UBOOT)
+        movel   %sp,_init_sp                    /* save initial stack pointer */
+#endif
 
         /*
          *      Do any platform or board specific setup now. Most boards