Merge git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6:
  sh: Fix up restorer in debug_trap exception return path.
  sh: Make is_valid_bugaddr() more intelligent on nommu.
  sh: use the common ascii hex helpers
  sh: fix sh7785 master clock value
  sh: Fix up thread info pointer in syscall_badsys resume path.
  sh: Fix up optimized SH-4 memcpy on big endian.
  sh: disable initrd defaults in .empty_zero_page.
  sh: display boot params by default on entry.

7 files changed, 45 insertions, 27 deletions

diff --git a/arch/sh/kernel/cpu/sh4a/clock-sh7785.c b/arch/sh/kernel/cpu/sh4a/clock-sh7785.c
index 805535aa505..27fa81bef6a 100644
--- a/arch/sh/kernel/cpu/sh4a/clock-sh7785.c
+++ b/arch/sh/kernel/cpu/sh4a/clock-sh7785.c
@@ -26,7 +26,7 @@ static int pfc_divisors[] = { 1, 1, 1, 1, 1, 1, 1, 18,
 
 static void master_clk_init(struct clk *clk)
 {
-        clk->rate *= 36;
+        clk->rate *= pfc_divisors[ctrl_inl(FRQMR1) & 0x000f];
 }
 
 static struct clk_ops sh7785_master_clk_ops = {
diff --git a/arch/sh/kernel/entry-common.S b/arch/sh/kernel/entry-common.S
index 926b2e7b11c..718bd2356b3 100644
--- a/arch/sh/kernel/entry-common.S
+++ b/arch/sh/kernel/entry-common.S
@@ -1,9 +1,6 @@
-/* $Id: entry.S,v 1.37 2004/06/11 13:02:46 doyu Exp $
- *
- *  linux/arch/sh/entry.S
- *
+/* 
  *  Copyright (C) 1999, 2000, 2002  Niibe Yutaka
- *  Copyright (C) 2003  Paul Mundt
+ *  Copyright (C) 2003 - 2008  Paul Mundt
  *
  * 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
@@ -262,6 +259,7 @@ __restore_all:
 
         .align  2
 syscall_badsys:                 ! Bad syscall number
+        get_current_thread_info r8, r0
         mov     #-ENOSYS, r0
         bra     resume_userspace
          mov.l  r0, @(OFF_R0,r15)       ! Return value
@@ -281,7 +279,9 @@ debug_trap:
         mov.l   1f, r8
         add     r0, r8
         mov.l   @r8, r8
-        jmp     @r8
+        jsr     @r8
+         nop
+        bra     __restore_all
          nop
 
         .align  2
diff --git a/arch/sh/kernel/head_32.S b/arch/sh/kernel/head_32.S
index d67d7ed09f2..ae0a382a82e 100644
--- a/arch/sh/kernel/head_32.S
+++ b/arch/sh/kernel/head_32.S
@@ -30,8 +30,8 @@ ENTRY(empty_zero_page)
         .long   0               /* RAMDISK_FLAGS */
         .long   0x0200          /* ORIG_ROOT_DEV */
         .long   1               /* LOADER_TYPE */
-        .long   0x00360000      /* INITRD_START */
-        .long   0x000a0000      /* INITRD_SIZE */
+        .long   0x00000000      /* INITRD_START */
+        .long   0x00000000      /* INITRD_SIZE */
 #ifdef CONFIG_32BIT
         .long   0x53453f00 + 32 /* "SE?" = 32 bit */
 #else
diff --git a/arch/sh/kernel/kgdb_stub.c b/arch/sh/kernel/kgdb_stub.c
index 832641bbd47..bf8ac4c7164 100644
--- a/arch/sh/kernel/kgdb_stub.c
+++ b/arch/sh/kernel/kgdb_stub.c
@@ -274,8 +274,7 @@ static char *mem_to_hex(const char *mem, char *buf, const int count)
         }
         for (i = 0; i < count; i++) {
                 ch = *mem++;
-                *buf++ = highhex(ch);
-                *buf++ = lowhex(ch);
+                buf = pack_hex_byte(buf, ch);
         }
         *buf = 0;
         return (buf);
@@ -427,8 +426,8 @@ static void put_packet(char *buffer)
 
                 /* '#' Separator, put high and low components of checksum */
                 put_debug_char('#');
-                put_debug_char(highhex(checksum));
-                put_debug_char(lowhex(checksum));
+                put_debug_char(hex_asc_hi(checksum));
+                put_debug_char(hex_asc_lo(checksum));
         }
         while ((get_debug_char()) != '+');      /* While no ack */
 }
@@ -650,8 +649,8 @@ static void undo_single_step(void)
 static void send_signal_msg(const int signum)
 {
         out_buffer[0] = 'S';
-        out_buffer[1] = highhex(signum);
-        out_buffer[2] = lowhex(signum);
+        out_buffer[1] = hex_asc_hi(signum);
+        out_buffer[2] = hex_asc_lo(signum);
         out_buffer[3] = 0;
         put_packet(out_buffer);
 }
diff --git a/arch/sh/kernel/setup.c b/arch/sh/kernel/setup.c
index 516bde9c50f..bca2bbc575d 100644
--- a/arch/sh/kernel/setup.c
+++ b/arch/sh/kernel/setup.c
@@ -292,6 +292,17 @@ void __init setup_arch(char **cmdline_p)
 
         ROOT_DEV = old_decode_dev(ORIG_ROOT_DEV);
 
+        printk(KERN_NOTICE "Boot params:\n"
+                           "... MOUNT_ROOT_RDONLY - %08lx\n"
+                           "... RAMDISK_FLAGS     - %08lx\n"
+                           "... ORIG_ROOT_DEV     - %08lx\n"
+                           "... LOADER_TYPE       - %08lx\n"
+                           "... INITRD_START      - %08lx\n"
+                           "... INITRD_SIZE       - %08lx\n",
+                           MOUNT_ROOT_RDONLY, RAMDISK_FLAGS,
+                           ORIG_ROOT_DEV, LOADER_TYPE,
+                           INITRD_START, INITRD_SIZE);
+
 #ifdef CONFIG_BLK_DEV_RAM
         rd_image_start = RAMDISK_FLAGS & RAMDISK_IMAGE_START_MASK;
         rd_prompt = ((RAMDISK_FLAGS & RAMDISK_PROMPT_FLAG) != 0);
diff --git a/arch/sh/kernel/traps.c b/arch/sh/kernel/traps.c
index a3bdc68ef02..438f1ebcc45 100644
--- a/arch/sh/kernel/traps.c
+++ b/arch/sh/kernel/traps.c
@@ -4,6 +4,7 @@
 #include <linux/kdebug.h>
 #include <linux/signal.h>
 #include <linux/sched.h>
+#include <linux/uaccess.h>
 #include <asm/system.h>
 
 #ifdef CONFIG_BUG
@@ -21,7 +22,14 @@ static void handle_BUG(struct pt_regs *regs)
 
 int is_valid_bugaddr(unsigned long addr)
 {
-        return addr >= PAGE_OFFSET;
+        unsigned short opcode;
+
+        if (addr < PAGE_OFFSET)
+                return 0;
+        if (probe_kernel_address((u16 *)addr, opcode))
+                return 0;
+
+        return opcode == TRAPA_BUG_OPCODE;
 }
 #endif
 
diff --git a/arch/sh/lib/memcpy-sh4.S b/arch/sh/lib/memcpy-sh4.S
index 560bc17eebd..459fa92a7c5 100644
--- a/arch/sh/lib/memcpy-sh4.S
+++ b/arch/sh/lib/memcpy-sh4.S
@@ -126,10 +126,10 @@
 
          mov.l  r3,@-r0         !  30 LS
 #else
-3:      mov     r1,r3           ! OPQR
+3:      mov     r7,r3           ! OPQR
         shlr8   r3              ! xOPQ
-        mov.l   @(r0,r5),r1     ! KLMN
-        mov     r1,r6
+        mov.l   @(r0,r5),r7     ! KLMN
+        mov     r7,r6
         shll16  r6
         shll8   r6              ! Nxxx
         or      r6,r3           ! NOPQ
@@ -733,24 +733,24 @@ ENTRY(memcpy)
         movca.l r0,@r1          !  40 LS (latency=3-7)
         add     #-0x1c, r1      !  50 EX
 
-        mov.l   r3, @(0x1c,r1)  !  33 LS
+        mov.l   r3, @(0x18,r1)  !  33 LS
         xtrct   r11, r10        !  48 EX
 
-        mov.l   r6, @(0x18,r1)  !  33 LS
+        mov.l   r6, @(0x14,r1)  !  33 LS
         xtrct   r12, r11        !  48 EX
 
-        mov.l   r7, @(0x14,r1)  !  33 LS
+        mov.l   r7, @(0x10,r1)  !  33 LS
 
-        mov.l   r8, @(0x10,r1)  !  33 LS
-        add     #-0x3e, r5      !  50 EX
+        mov.l   r8, @(0x0c,r1)  !  33 LS
+        add     #-0x1e, r5      !  50 EX
 
-        mov.l   r9, @(0x0c,r1)  !  33 LS
+        mov.l   r9, @(0x08,r1)  !  33 LS
         cmp/eq  r2,r1           !  54 MT
 
-        mov.l   r10, @(0x08,r1) !  33 LS
+        mov.l   r10, @(0x04,r1) !  33 LS
         bf/s    2b              ! 109 BR
 
-         mov.l  r11, @(0x04,r1) !  33 LS
+         mov.l  r11, @(0x00,r1) !  33 LS
 #endif
 
         mov.l   @r15+, r12