From 5f8c9908f200b775a3d6c345bc6f3e928e2426a9 Mon Sep 17 00:00:00 2001
From: Paul Mundt <lethal@linux-sh.org>
Date: Tue, 8 May 2007 11:55:21 +0900
Subject: [PATCH 01/18] sh: generic quicklist support.

This moves SH over to the generic quicklists. As per x86_64,
we have special mappings for the PGDs, so these go on their
own list..

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
 arch/sh/kernel/process.c |  2 ++
 arch/sh/mm/Kconfig       |  3 +++
 arch/sh/mm/init.c        |  2 ++
 include/asm-sh/pgalloc.h | 44 +++++++++++++++++++++++++---------------
 mm/Kconfig               |  2 +-
 5 files changed, 36 insertions(+), 17 deletions(-)

diff --git a/arch/sh/kernel/process.c b/arch/sh/kernel/process.c
index 329b3f3051de..4688b890aef8 100644
--- a/arch/sh/kernel/process.c
+++ b/arch/sh/kernel/process.c
@@ -18,6 +18,7 @@
 #include <asm/kdebug.h>
 #include <asm/uaccess.h>
 #include <asm/mmu_context.h>
+#include <asm/pgalloc.h>
 #include <asm/ubc.h>
 
 static int hlt_counter;
@@ -64,6 +65,7 @@ void cpu_idle(void)
 		preempt_enable_no_resched();
 		schedule();
 		preempt_disable();
+		check_pgt_cache();
 	}
 }
 
diff --git a/arch/sh/mm/Kconfig b/arch/sh/mm/Kconfig
index 12f3d394dc28..b773361892c9 100644
--- a/arch/sh/mm/Kconfig
+++ b/arch/sh/mm/Kconfig
@@ -218,6 +218,9 @@ endmenu
 
 menu "Memory management options"
 
+config QUICKLIST
+	def_bool y
+
 config MMU
         bool "Support for memory management hardware"
 	depends on !CPU_SH2
diff --git a/arch/sh/mm/init.c b/arch/sh/mm/init.c
index 4d030988b368..8fe223a890ed 100644
--- a/arch/sh/mm/init.c
+++ b/arch/sh/mm/init.c
@@ -67,6 +67,8 @@ void show_mem(void)
 	printk("%d slab pages\n", slab);
 	printk("%d pages shared\n", shared);
 	printk("%d pages swap cached\n", cached);
+	printk(KERN_INFO "Total of %ld pages in page table cache\n",
+	       quicklist_total_size());
 }
 
 #ifdef CONFIG_MMU
diff --git a/include/asm-sh/pgalloc.h b/include/asm-sh/pgalloc.h
index 888e4529e6fe..26e493f39dbb 100644
--- a/include/asm-sh/pgalloc.h
+++ b/include/asm-sh/pgalloc.h
@@ -1,6 +1,12 @@
 #ifndef __ASM_SH_PGALLOC_H
 #define __ASM_SH_PGALLOC_H
 
+#include <linux/quicklist.h>
+#include <asm/page.h>
+
+#define QUICK_PGD 0	/* We preserve special mappings over free */
+#define QUICK_PT 1	/* Other page table pages that are zero on free */
+
 static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd,
 				       pte_t *pte)
 {
@@ -13,48 +19,49 @@ static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
 	set_pmd(pmd, __pmd((unsigned long)page_address(pte)));
 }
 
+static inline void pgd_ctor(void *x)
+{
+	pgd_t *pgd = x;
+
+	memcpy(pgd + USER_PTRS_PER_PGD,
+	       swapper_pg_dir + USER_PTRS_PER_PGD,
+	       (PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));
+}
+
 /*
  * Allocate and free page tables.
  */
 static inline pgd_t *pgd_alloc(struct mm_struct *mm)
 {
-	pgd_t *pgd = (pgd_t *)__get_free_page(GFP_KERNEL | __GFP_REPEAT);
-
-	if (pgd) {
-		memset(pgd, 0, USER_PTRS_PER_PGD * sizeof(pgd_t));
-		memcpy(pgd + USER_PTRS_PER_PGD,
-		       swapper_pg_dir + USER_PTRS_PER_PGD,
-		       (PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));
-	}
-
-	return pgd;
+	return quicklist_alloc(QUICK_PGD, GFP_KERNEL | __GFP_REPEAT, pgd_ctor);
 }
 
 static inline void pgd_free(pgd_t *pgd)
 {
-	free_page((unsigned long)pgd);
+	quicklist_free(QUICK_PGD, NULL, pgd);
 }
 
 static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
 					  unsigned long address)
 {
-	return (pte_t *)__get_free_page(GFP_KERNEL | __GFP_REPEAT | __GFP_ZERO);
+	return quicklist_alloc(QUICK_PT, GFP_KERNEL, NULL);
 }
 
 static inline struct page *pte_alloc_one(struct mm_struct *mm,
 					 unsigned long address)
 {
-	return alloc_page(GFP_KERNEL | __GFP_REPEAT | __GFP_ZERO);
+	void *pg = quicklist_alloc(QUICK_PT, GFP_KERNEL, NULL);
+	return pg ? virt_to_page(pg) : NULL;
 }
 
 static inline void pte_free_kernel(pte_t *pte)
 {
-	free_page((unsigned long)pte);
+	quicklist_free(QUICK_PT, NULL, pte);
 }
 
 static inline void pte_free(struct page *pte)
 {
-	__free_page(pte);
+	quicklist_free_page(QUICK_PT, NULL, pte);
 }
 
 #define __pte_free_tlb(tlb,pte) tlb_remove_page((tlb),(pte))
@@ -66,6 +73,11 @@ static inline void pte_free(struct page *pte)
 
 #define pmd_free(x)			do { } while (0)
 #define __pmd_free_tlb(tlb,x)		do { } while (0)
-#define check_pgt_cache()		do { } while (0)
+
+static inline void check_pgt_cache(void)
+{
+	quicklist_trim(QUICK_PGD, NULL, 25, 16);
+	quicklist_trim(QUICK_PT, NULL, 25, 16);
+}
 
 #endif /* __ASM_SH_PGALLOC_H */
diff --git a/mm/Kconfig b/mm/Kconfig
index 1ac718f636ec..a17da8bafe62 100644
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -166,5 +166,5 @@ config ZONE_DMA_FLAG
 config NR_QUICK
 	int
 	depends on QUICKLIST
+	default "2" if SUPERH
 	default "1"
-

From 435c55d1ef3ec5460fab8c332a693ef5fad18454 Mon Sep 17 00:00:00 2001
From: Paul Mundt <lethal@linux-sh.org>
Date: Tue, 8 May 2007 11:56:27 +0900
Subject: [PATCH 02/18] rtc: rtc-sh: Fix up dev_dbg() warnings.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
 drivers/rtc/rtc-sh.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/rtc/rtc-sh.c b/drivers/rtc/rtc-sh.c
index 6abf4811958c..bde3d34cb007 100644
--- a/drivers/rtc/rtc-sh.c
+++ b/drivers/rtc/rtc-sh.c
@@ -341,7 +341,7 @@ static int sh_rtc_read_time(struct device *dev, struct rtc_time *tm)
 		tm->tm_sec--;
 #endif
 
-	dev_dbg(&dev, "%s: tm is secs=%d, mins=%d, hours=%d, "
+	dev_dbg(dev, "%s: tm is secs=%d, mins=%d, hours=%d, "
 		"mday=%d, mon=%d, year=%d, wday=%d\n",
 		__FUNCTION__,
 		tm->tm_sec, tm->tm_min, tm->tm_hour,

From 1039b9a9d830e906efa770db75db8a3e11c47c1a Mon Sep 17 00:00:00 2001
From: Paul Mundt <lethal@linux-sh.org>
Date: Tue, 8 May 2007 12:07:21 +0900
Subject: [PATCH 03/18] sh: __GFP_REPEAT for pte allocations, too.

This got dropped in the quicklist conversion, add it back in..

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
 include/asm-sh/pgalloc.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/include/asm-sh/pgalloc.h b/include/asm-sh/pgalloc.h
index 26e493f39dbb..18b613c57cf5 100644
--- a/include/asm-sh/pgalloc.h
+++ b/include/asm-sh/pgalloc.h
@@ -44,13 +44,13 @@ static inline void pgd_free(pgd_t *pgd)
 static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
 					  unsigned long address)
 {
-	return quicklist_alloc(QUICK_PT, GFP_KERNEL, NULL);
+	return quicklist_alloc(QUICK_PT, GFP_KERNEL | __GFP_REPEAT, NULL);
 }
 
 static inline struct page *pte_alloc_one(struct mm_struct *mm,
 					 unsigned long address)
 {
-	void *pg = quicklist_alloc(QUICK_PT, GFP_KERNEL, NULL);
+	void *pg = quicklist_alloc(QUICK_PT, GFP_KERNEL | __GFP_REPEAT, NULL);
 	return pg ? virt_to_page(pg) : NULL;
 }
 

From 44530c696b3fc2c8a45bdc798af85528e065ed80 Mon Sep 17 00:00:00 2001
From: Paul Mundt <lethal@linux-sh.org>
Date: Tue, 8 May 2007 12:14:54 +0900
Subject: [PATCH 04/18] sh: Always define TRAPA_BUG_OPCODE.

Previously this was only set when CONFIG_BUG=y. While we rely
on that for handle_BUG() dispatch, we still want to hand the
opcode off to the die chain notifier for determining the trap
value.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
 include/asm-sh/bug.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/include/asm-sh/bug.h b/include/asm-sh/bug.h
index 794c36daf06d..46f925c815ac 100644
--- a/include/asm-sh/bug.h
+++ b/include/asm-sh/bug.h
@@ -1,12 +1,12 @@
 #ifndef __ASM_SH_BUG_H
 #define __ASM_SH_BUG_H
 
+#define TRAPA_BUG_OPCODE	0xc33e	/* trapa #0x3e */
+
 #ifdef CONFIG_BUG
 #define HAVE_ARCH_BUG
 #define HAVE_ARCH_WARN_ON
 
-#define TRAPA_BUG_OPCODE	0xc33e	/* trapa #0x3e */
-
 /**
  * _EMIT_BUG_ENTRY
  * %1 - __FILE__

From 00bf0610e4cdbb9fd79ce4718e12b24cd7876dd7 Mon Sep 17 00:00:00 2001
From: Paul Mundt <lethal@linux-sh.org>
Date: Tue, 8 May 2007 13:01:37 +0900
Subject: [PATCH 05/18] sh: Share exception vector table for SH-3/4.

The only difference between these at the moment are the FPU
exceptions, and these are hidden away under CONFIG_SH_FPU
(which is only set for the SH-4 case anyways..).

This consolidates the two tables, and updates SH-4 to use
the updated copy.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
 arch/sh/kernel/cpu/sh3/ex.S     | 13 ++++---
 arch/sh/kernel/cpu/sh4/Makefile |  6 ++--
 arch/sh/kernel/cpu/sh4/ex.S     | 62 ---------------------------------
 3 files changed, 11 insertions(+), 70 deletions(-)
 delete mode 100644 arch/sh/kernel/cpu/sh4/ex.S

diff --git a/arch/sh/kernel/cpu/sh3/ex.S b/arch/sh/kernel/cpu/sh3/ex.S
index ba3082d640b5..2b2a9e02fb75 100644
--- a/arch/sh/kernel/cpu/sh3/ex.S
+++ b/arch/sh/kernel/cpu/sh3/ex.S
@@ -1,7 +1,7 @@
 /*
  *  arch/sh/kernel/cpu/sh3/ex.S
  *
- *  The SH-3 exception vector table.
+ *  The SH-3 and SH-4 exception vector table.
 
  *  Copyright (C) 1999, 2000, 2002  Niibe Yutaka
  *  Copyright (C) 2003 - 2006  Paul Mundt
@@ -9,7 +9,6 @@
  * 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/linkage.h>
 
@@ -36,8 +35,12 @@ ENTRY(exception_handling_table)
 	.long	exception_error	! address error load
 	.long	exception_error	! address error store	/* 100 */
 #endif
-	.long	exception_error	! fpu_exception	/* 120 */
-	.long	exception_error			/* 140 */
+#if defined(CONFIG_SH_FPU)
+	.long	do_fpu_error		/* 120 */
+#else
+	.long	exception_error		/* 120 */
+#endif
+	.long	exception_error		/* 140 */
 	.long	system_call	! Unconditional Trap	 /* 160 */
 	.long	exception_error	! reserved_instruction (filled by trap_init) /* 180 */
 	.long	exception_error	! illegal_slot_instruction (filled by trap_init) /*1A0*/
@@ -55,4 +58,4 @@ ENTRY(user_break_point_trap)
 	 * away offsets can be manually inserted in to their appropriate
 	 * location via set_exception_table_{evt,vec}().
 	 */
-	.balign 4096,0,4096
+	.balign	4096,0,4096
diff --git a/arch/sh/kernel/cpu/sh4/Makefile b/arch/sh/kernel/cpu/sh4/Makefile
index 19ca68c71884..8add10bd8268 100644
--- a/arch/sh/kernel/cpu/sh4/Makefile
+++ b/arch/sh/kernel/cpu/sh4/Makefile
@@ -2,10 +2,10 @@
 # Makefile for the Linux/SuperH SH-4 backends.
 #
 
-obj-y	:= ex.o probe.o common.o
-common-y	+= $(addprefix ../sh3/, entry.o)
+obj-y	:= probe.o common.o
+common-y	+= $(addprefix ../sh3/, entry.o ex.o)
 
-obj-$(CONFIG_SH_FPU)                    += fpu.o
+obj-$(CONFIG_SH_FPU)			+= fpu.o
 obj-$(CONFIG_SH_STORE_QUEUES)		+= sq.o
 
 # CPU subtype setup
diff --git a/arch/sh/kernel/cpu/sh4/ex.S b/arch/sh/kernel/cpu/sh4/ex.S
deleted file mode 100644
index ac8ab57413cc..000000000000
--- a/arch/sh/kernel/cpu/sh4/ex.S
+++ /dev/null
@@ -1,62 +0,0 @@
-/*
- *  arch/sh/kernel/cpu/sh4/ex.S
- *
- *  The SH-4 exception vector table.
-
- *  Copyright (C) 1999, 2000, 2002  Niibe Yutaka
- *  Copyright (C) 2003 - 2006  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
- * for more details.
- *
- */
-#include <linux/linkage.h>
-
-	.align 2
-	.data
-
-ENTRY(exception_handling_table)
-	.long	exception_error		/* 000 */
-	.long	exception_error
-#if defined(CONFIG_MMU)
-	.long	tlb_miss_load		/* 040 */
-	.long	tlb_miss_store
-	.long	initial_page_write
-	.long	tlb_protection_violation_load
-	.long	tlb_protection_violation_store
-	.long	address_error_load
-	.long	address_error_store	/* 100 */
-#else
-	.long	exception_error	! tlb miss load		/* 040 */
-	.long	exception_error	! tlb miss store
-	.long	exception_error	! initial page write
-	.long	exception_error	! tlb prot violation load
-	.long	exception_error	! tlb prot violation store
-	.long	exception_error	! address error load
-	.long	exception_error	! address error store	/* 100 */
-#endif
-#if defined(CONFIG_SH_FPU)
-	.long	do_fpu_error		/* 120 */
-#else
-	.long	exception_error		/* 120 */
-#endif
-	.long	exception_error		/* 140 */
-	.long	system_call	! Unconditional Trap	 /* 160 */
-	.long	exception_error	! reserved_instruction (filled by trap_init) /* 180 */
-	.long	exception_error	! illegal_slot_instruction (filled by trap_init) /*1A0*/
-ENTRY(nmi_slot)
-#if defined (CONFIG_KGDB_NMI)
-	.long	debug_enter	/* 1C0 */	! Allow trap to debugger
-#else
-	.long	exception_none	/* 1C0 */	! Not implemented yet
-#endif
-ENTRY(user_break_point_trap)
-	.long	break_point_trap	/* 1E0 */
-
-	/*
-	 * Pad the remainder of the table out, exceptions residing in far
-	 * away offsets can be manually inserted in to their appropriate
-	 * location via set_exception_table_{evt,vec}().
-	 */
-	.balign	4096,0,4096

From 51c8b856f5edfa45d956721aa6d6ebaa15699062 Mon Sep 17 00:00:00 2001
From: Paul Mundt <lethal@linux-sh.org>
Date: Tue, 8 May 2007 13:16:57 +0900
Subject: [PATCH 06/18] sh: Kill off redundant __div64_32 symbol export.

modpost noticed that __div64_32 was being exported twice:

WARNING: lib/built-in: '__div64_32' exported twice. Previous export was
in arch/sh/kernel/built-in.ko

kill off the duplicate.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
 arch/sh/kernel/sh_ksyms.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/arch/sh/kernel/sh_ksyms.c b/arch/sh/kernel/sh_ksyms.c
index fa91641c1f62..c1cfcb9f047c 100644
--- a/arch/sh/kernel/sh_ksyms.c
+++ b/arch/sh/kernel/sh_ksyms.c
@@ -58,8 +58,6 @@ EXPORT_SYMBOL(__udelay);
 EXPORT_SYMBOL(__ndelay);
 EXPORT_SYMBOL(__const_udelay);
 
-EXPORT_SYMBOL(__div64_32);
-
 #define DECLARE_EXPORT(name) extern void name(void);EXPORT_SYMBOL(name)
 
 /* These symbols are generated by the compiler itself */

From bd0799977cb9b68aa6a39e9630aeea4778a58385 Mon Sep 17 00:00:00 2001
From: Paul Mundt <lethal@linux-sh.org>
Date: Tue, 8 May 2007 14:50:59 +0900
Subject: [PATCH 07/18] sh: Support for SH-2A 32-bit opcodes.

SH-2A supports both 16 and 32-bit instructions, add a simple helper
for figuring out the instruction size in the places where there are
hardcoded 16-bit assumptions.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
 arch/sh/kernel/cpu/sh2a/Makefile        |  5 +--
 arch/sh/kernel/cpu/sh2a/opcode_helper.c | 55 +++++++++++++++++++++++++
 arch/sh/kernel/kgdb_stub.c              |  2 +-
 arch/sh/kernel/process.c                |  5 ++-
 arch/sh/kernel/signal.c                 |  8 ++--
 include/asm-sh/system.h                 |  9 ++++
 6 files changed, 74 insertions(+), 10 deletions(-)
 create mode 100644 arch/sh/kernel/cpu/sh2a/opcode_helper.c

diff --git a/arch/sh/kernel/cpu/sh2a/Makefile b/arch/sh/kernel/cpu/sh2a/Makefile
index 350972ae9410..965fa2572b23 100644
--- a/arch/sh/kernel/cpu/sh2a/Makefile
+++ b/arch/sh/kernel/cpu/sh2a/Makefile
@@ -2,9 +2,8 @@
 # Makefile for the Linux/SuperH SH-2A backends.
 #
 
-obj-y	:= common.o probe.o
+obj-y	:= common.o probe.o opcode_helper.o
 
-common-y	+= $(addprefix ../sh2/, ex.o)
-common-y	+= $(addprefix ../sh2/, entry.o)
+common-y	+= $(addprefix ../sh2/, ex.o entry.o)
 
 obj-$(CONFIG_CPU_SUBTYPE_SH7206) += setup-sh7206.o clock-sh7206.o
diff --git a/arch/sh/kernel/cpu/sh2a/opcode_helper.c b/arch/sh/kernel/cpu/sh2a/opcode_helper.c
new file mode 100644
index 000000000000..9704b7926d8b
--- /dev/null
+++ b/arch/sh/kernel/cpu/sh2a/opcode_helper.c
@@ -0,0 +1,55 @@
+/*
+ * arch/sh/kernel/cpu/sh2a/opcode_helper.c
+ *
+ * Helper for the SH-2A 32-bit opcodes.
+ *
+ *  Copyright (C) 2007  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
+ * for more details.
+ */
+#include <linux/kernel.h>
+#include <asm/system.h>
+
+/*
+ * Instructions on SH are generally fixed at 16-bits, however, SH-2A
+ * introduces some 32-bit instructions. Since there are no real
+ * constraints on their use (and they can be mixed and matched), we need
+ * to check the instruction encoding to work out if it's a true 32-bit
+ * instruction or not.
+ *
+ * Presently, 32-bit opcodes have only slight variations in what the
+ * actual encoding looks like in the first-half of the instruction, which
+ * makes it fairly straightforward to differentiate from the 16-bit ones.
+ *
+ * First 16-bits of encoding		Used by
+ *
+ *	0011nnnnmmmm0001	mov.b, mov.w, mov.l, fmov.d,
+ *				fmov.s, movu.b, movu.w
+ *
+ *	0011nnnn0iii1001        bclr.b, bld.b, bset.b, bst.b, band.b,
+ *				bandnot.b, bldnot.b, bor.b, bornot.b,
+ *				bxor.b
+ *
+ *	0000nnnniiii0000        movi20
+ *	0000nnnniiii0001        movi20s
+ */
+unsigned int instruction_size(unsigned int insn)
+{
+	/* Look for the common cases */
+	switch ((insn & 0xf00f)) {
+	case 0x0000:	/* movi20 */
+	case 0x0001:	/* movi20s */
+	case 0x3001:	/* 32-bit mov/fmov/movu variants */
+		return 4;
+	}
+
+	/* And the special cases.. */
+	switch ((insn & 0xf08f)) {
+	case 0x3009:	/* 32-bit b*.b bit operations */
+		return 4;
+	}
+
+	return 2;
+}
diff --git a/arch/sh/kernel/kgdb_stub.c b/arch/sh/kernel/kgdb_stub.c
index a5323364cbca..ffe3e3ee580d 100644
--- a/arch/sh/kernel/kgdb_stub.c
+++ b/arch/sh/kernel/kgdb_stub.c
@@ -867,7 +867,7 @@ static void kgdb_command_loop(const int excep_code, const int trapa_value)
 	   trap 0xff, since that indicates a compiled-in breakpoint which
 	   will not be replaced (and we would retake the trap forever) */
 	if ((excep_code == TRAP_VEC) && (trapa_value != (0x3c << 2)))
-		trap_registers.pc -= 2;
+		trap_registers.pc -= instruction_size(trap_registers.pc);
 
 	/* Undo any stepping we may have done */
 	undo_single_step();
diff --git a/arch/sh/kernel/process.c b/arch/sh/kernel/process.c
index 4688b890aef8..209cc9b42186 100644
--- a/arch/sh/kernel/process.c
+++ b/arch/sh/kernel/process.c
@@ -19,6 +19,7 @@
 #include <asm/uaccess.h>
 #include <asm/mmu_context.h>
 #include <asm/pgalloc.h>
+#include <asm/system.h>
 #include <asm/ubc.h>
 
 static int hlt_counter;
@@ -497,7 +498,7 @@ asmlinkage void debug_trap_handler(unsigned long r4, unsigned long r5,
 	struct pt_regs *regs = RELOC_HIDE(&__regs, 0);
 
 	/* Rewind */
-	regs->pc -= 2;
+	regs->pc -= instruction_size(regs->pc);
 
 	if (notify_die(DIE_TRAP, regs, regs->tra & 0xff,
 		       SIGTRAP) == NOTIFY_STOP)
@@ -516,7 +517,7 @@ asmlinkage void bug_trap_handler(unsigned long r4, unsigned long r5,
 	struct pt_regs *regs = RELOC_HIDE(&__regs, 0);
 
 	/* Rewind */
-	regs->pc -= 2;
+	regs->pc -= instruction_size(regs->pc);
 
 	if (notify_die(DIE_TRAP, regs, TRAPA_BUG_OPCODE & 0xff,
 		       SIGTRAP) == NOTIFY_STOP)
diff --git a/arch/sh/kernel/signal.c b/arch/sh/kernel/signal.c
index eb0191c374b6..d7d98d691c64 100644
--- a/arch/sh/kernel/signal.c
+++ b/arch/sh/kernel/signal.c
@@ -23,7 +23,7 @@
 #include <linux/personality.h>
 #include <linux/binfmts.h>
 #include <linux/freezer.h>
-
+#include <asm/system.h>
 #include <asm/ucontext.h>
 #include <asm/uaccess.h>
 #include <asm/pgtable.h>
@@ -500,7 +500,7 @@ handle_signal(unsigned long sig, struct k_sigaction *ka, siginfo_t *info,
 				}
 			/* fallthrough */
 			case -ERESTARTNOINTR:
-				regs->pc -= 2;
+				regs->pc -= instruction_size(regs->pc);
 		}
 	} else {
 		/* gUSA handling */
@@ -600,9 +600,9 @@ static void do_signal(struct pt_regs *regs, unsigned int save_r0)
 		    regs->regs[0] == -ERESTARTSYS ||
 		    regs->regs[0] == -ERESTARTNOINTR) {
 			regs->regs[0] = save_r0;
-			regs->pc -= 2;
+			regs->pc -= instruction_size(regs->pc);
 		} else if (regs->regs[0] == -ERESTART_RESTARTBLOCK) {
-			regs->pc -= 2;
+			regs->pc -= instruction_size(regs->pc);
 			regs->regs[3] = __NR_restart_syscall;
 		}
 	}
diff --git a/include/asm-sh/system.h b/include/asm-sh/system.h
index e7e96ee0c8a5..82f3e229e621 100644
--- a/include/asm-sh/system.h
+++ b/include/asm-sh/system.h
@@ -255,6 +255,15 @@ static inline void *set_exception_table_evt(unsigned int evt, void *handler)
 	return set_exception_table_vec(evt >> 5, handler);
 }
 
+/*
+ * SH-2A has both 16 and 32-bit opcodes, do lame encoding checks.
+ */
+#ifdef CONFIG_CPU_SH2A
+extern unsigned int instruction_size(unsigned int insn);
+#else
+#define instruction_size(insn)	(2)
+#endif
+
 /* XXX
  * disable hlt during certain critical i/o operations
  */

From 53f983a90d7908bcece51f86180c7c9b575a1e4d Mon Sep 17 00:00:00 2001
From: Paul Mundt <lethal@linux-sh.org>
Date: Tue, 8 May 2007 15:31:48 +0900
Subject: [PATCH 08/18] sh: Fix PC adjustments for varying opcode length.

There are a few different cases for figuring out how to
size the instruction. We read in the instruction located
at regs->pc - 4 when rewinding the opcode to figure out if
there's a 32-bit opcode before the faulting instruction, with
a default of a - 2 adjustment on a mismatch. In practice this
works for the cases where pc - 4 is just another 16-bit opcode,
or we happen to have a 32-bit and a 16-bit immediately
preceeding the pc value.

In the cases where we aren't rewinding, this is much less ugly..

We also don't bother fixing up the places where we're explicitly
dealing with 16-bit instructions, since this might lead to
confusion regarding the encoding size possibilities on other
CPU variants.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
 arch/sh/kernel/cpu/sh4/fpu.c |  3 ++-
 arch/sh/kernel/kgdb_stub.c   |  2 +-
 arch/sh/kernel/process.c     |  4 ++--
 arch/sh/kernel/signal.c      | 11 +++++++----
 arch/sh/kernel/traps.c       |  4 ++--
 5 files changed, 14 insertions(+), 10 deletions(-)

diff --git a/arch/sh/kernel/cpu/sh4/fpu.c b/arch/sh/kernel/cpu/sh4/fpu.c
index 7624677f6628..d61dd599169f 100644
--- a/arch/sh/kernel/cpu/sh4/fpu.c
+++ b/arch/sh/kernel/cpu/sh4/fpu.c
@@ -16,6 +16,7 @@
 #include <linux/sched.h>
 #include <linux/signal.h>
 #include <asm/processor.h>
+#include <asm/system.h>
 #include <asm/io.h>
 
 /* The PR (precision) bit in the FP Status Register must be clear when
@@ -265,7 +266,7 @@ ieee_fpe_handler (struct pt_regs *regs)
 		nextpc = regs->pr;
 		finsn = *(unsigned short *) (regs->pc + 2);
 	} else {
-		nextpc = regs->pc + 2;
+		nextpc = regs->pc + instruction_size(insn);
 		finsn = insn;
 	}
 
diff --git a/arch/sh/kernel/kgdb_stub.c b/arch/sh/kernel/kgdb_stub.c
index ffe3e3ee580d..a5323364cbca 100644
--- a/arch/sh/kernel/kgdb_stub.c
+++ b/arch/sh/kernel/kgdb_stub.c
@@ -867,7 +867,7 @@ static void kgdb_command_loop(const int excep_code, const int trapa_value)
 	   trap 0xff, since that indicates a compiled-in breakpoint which
 	   will not be replaced (and we would retake the trap forever) */
 	if ((excep_code == TRAP_VEC) && (trapa_value != (0x3c << 2)))
-		trap_registers.pc -= instruction_size(trap_registers.pc);
+		trap_registers.pc -= 2;
 
 	/* Undo any stepping we may have done */
 	undo_single_step();
diff --git a/arch/sh/kernel/process.c b/arch/sh/kernel/process.c
index 209cc9b42186..9005b2f12aaa 100644
--- a/arch/sh/kernel/process.c
+++ b/arch/sh/kernel/process.c
@@ -498,7 +498,7 @@ asmlinkage void debug_trap_handler(unsigned long r4, unsigned long r5,
 	struct pt_regs *regs = RELOC_HIDE(&__regs, 0);
 
 	/* Rewind */
-	regs->pc -= instruction_size(regs->pc);
+	regs->pc -= instruction_size(ctrl_inw(regs->pc - 4));
 
 	if (notify_die(DIE_TRAP, regs, regs->tra & 0xff,
 		       SIGTRAP) == NOTIFY_STOP)
@@ -517,7 +517,7 @@ asmlinkage void bug_trap_handler(unsigned long r4, unsigned long r5,
 	struct pt_regs *regs = RELOC_HIDE(&__regs, 0);
 
 	/* Rewind */
-	regs->pc -= instruction_size(regs->pc);
+	regs->pc -= instruction_size(ctrl_inw(regs->pc - 4));
 
 	if (notify_die(DIE_TRAP, regs, TRAPA_BUG_OPCODE & 0xff,
 		       SIGTRAP) == NOTIFY_STOP)
diff --git a/arch/sh/kernel/signal.c b/arch/sh/kernel/signal.c
index d7d98d691c64..b32c35a7c0a3 100644
--- a/arch/sh/kernel/signal.c
+++ b/arch/sh/kernel/signal.c
@@ -500,7 +500,9 @@ handle_signal(unsigned long sig, struct k_sigaction *ka, siginfo_t *info,
 				}
 			/* fallthrough */
 			case -ERESTARTNOINTR:
-				regs->pc -= instruction_size(regs->pc);
+				regs->pc -= instruction_size(
+						ctrl_inw(regs->pc - 4));
+				break;
 		}
 	} else {
 		/* gUSA handling */
@@ -516,7 +518,8 @@ handle_signal(unsigned long sig, struct k_sigaction *ka, siginfo_t *info,
 			regs->regs[15] = regs->regs[1];
 			if (regs->pc < regs->regs[0])
 				/* Go to rewind point #1 */
-				regs->pc = regs->regs[0] + offset - 2;
+				regs->pc = regs->regs[0] + offset -
+					instruction_size(ctrl_inw(regs->pc-4));
 		}
 #ifdef CONFIG_PREEMPT
 		local_irq_restore(flags);
@@ -600,9 +603,9 @@ static void do_signal(struct pt_regs *regs, unsigned int save_r0)
 		    regs->regs[0] == -ERESTARTSYS ||
 		    regs->regs[0] == -ERESTARTNOINTR) {
 			regs->regs[0] = save_r0;
-			regs->pc -= instruction_size(regs->pc);
+			regs->pc -= instruction_size(ctrl_inw(regs->pc - 4));
 		} else if (regs->regs[0] == -ERESTART_RESTARTBLOCK) {
-			regs->pc -= instruction_size(regs->pc);
+			regs->pc -= instruction_size(ctrl_inw(regs->pc - 4));
 			regs->regs[3] = __NR_restart_syscall;
 		}
 	}
diff --git a/arch/sh/kernel/traps.c b/arch/sh/kernel/traps.c
index 7b40f0ff3dfc..1446d12ba220 100644
--- a/arch/sh/kernel/traps.c
+++ b/arch/sh/kernel/traps.c
@@ -505,7 +505,7 @@ static int handle_unaligned_access(u16 instruction, struct pt_regs *regs)
  simple:
 	ret = handle_unaligned_ins(instruction,regs);
 	if (ret==0)
-		regs->pc += 2;
+		regs->pc += instruction_size(instruction);
 	return ret;
 }
 #endif /* CONFIG_CPU_SH2A */
@@ -682,7 +682,7 @@ asmlinkage void do_reserved_inst(unsigned long r4, unsigned long r5,
 
 	err = do_fpu_inst(inst, regs);
 	if (!err) {
-		regs->pc += 2;
+		regs->pc += instruction_size(inst);
 		return;
 	}
 	/* not a FPU inst. */

From 074f98df0547b7d15f78db9a17e985da0c22af28 Mon Sep 17 00:00:00 2001
From: Paul Mundt <lethal@linux-sh.org>
Date: Tue, 8 May 2007 15:45:33 +0900
Subject: [PATCH 09/18] sh: Add 32-bit opcode feature CPU flag.

Add a CPU flag for the CPUs that support 32-bit opcodes, which
gets passed down to userspace.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
 arch/sh/kernel/cpu/sh2a/probe.c | 1 +
 arch/sh/kernel/setup.c          | 2 +-
 include/asm-sh/cpu-features.h   | 1 +
 3 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/arch/sh/kernel/cpu/sh2a/probe.c b/arch/sh/kernel/cpu/sh2a/probe.c
index 426f6db01fc6..f455c3509789 100644
--- a/arch/sh/kernel/cpu/sh2a/probe.c
+++ b/arch/sh/kernel/cpu/sh2a/probe.c
@@ -18,6 +18,7 @@ int __init detect_cpu_and_cache_system(void)
 {
 	/* Just SH7206 for now .. */
 	current_cpu_data.type			= CPU_SH7206;
+	current_cpu_data.flags			|= CPU_HAS_OP32;
 
 	current_cpu_data.dcache.ways		= 4;
 	current_cpu_data.dcache.way_incr	= (1 << 11);
diff --git a/arch/sh/kernel/setup.c b/arch/sh/kernel/setup.c
index 477d2a854fc4..c27729135935 100644
--- a/arch/sh/kernel/setup.c
+++ b/arch/sh/kernel/setup.c
@@ -431,7 +431,7 @@ const char *get_cpu_subtype(struct sh_cpuinfo *c)
 /* Symbolic CPU flags, keep in sync with asm/cpu-features.h */
 static const char *cpu_flags[] = {
 	"none", "fpu", "p2flush", "mmuassoc", "dsp", "perfctr",
-	"ptea", "llsc", "l2", NULL
+	"ptea", "llsc", "l2", "op32", NULL
 };
 
 static void show_cpuflags(struct seq_file *m, struct sh_cpuinfo *c)
diff --git a/include/asm-sh/cpu-features.h b/include/asm-sh/cpu-features.h
index 4bccd7c032f9..86308aa39731 100644
--- a/include/asm-sh/cpu-features.h
+++ b/include/asm-sh/cpu-features.h
@@ -20,5 +20,6 @@
 #define CPU_HAS_PTEA		0x0020	/* PTEA register */
 #define CPU_HAS_LLSC		0x0040	/* movli.l/movco.l */
 #define CPU_HAS_L2_CACHE	0x0080	/* Secondary cache / URAM */
+#define CPU_HAS_OP32		0x0100	/* 32-bit instruction support */
 
 #endif /* __ASM_SH_CPU_FEATURES_H */

From c71861e65e2898850478a7ac6c4b8cc9f7007e9e Mon Sep 17 00:00:00 2001
From: kogiidena <kogiidena@eggplant.ddo.jp>
Date: Tue, 8 May 2007 20:45:46 +0900
Subject: [PATCH 10/18] sh: Fixup ndelay() xloops calculation for alternate HZ.

Currently the xloops calculation in ndelay() gets set to 0 when
calculated with HZ=250, fix up how we do the HZ factoring in order
to get this right for differing values.

Signed-off-by: kogiidena <kogiidena@eggplant.ddo.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
 arch/sh/lib/delay.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/arch/sh/lib/delay.c b/arch/sh/lib/delay.c
index 351714694d6d..f3ddd2133e6f 100644
--- a/arch/sh/lib/delay.c
+++ b/arch/sh/lib/delay.c
@@ -24,9 +24,10 @@ inline void __const_udelay(unsigned long xloops)
 	__asm__("dmulu.l	%0, %2\n\t"
 		"sts	mach, %0"
 		: "=r" (xloops)
-		: "0" (xloops), "r" (cpu_data[raw_smp_processor_id()].loops_per_jiffy)
+		: "0" (xloops),
+		  "r" (HZ * cpu_data[raw_smp_processor_id()].loops_per_jiffy)
 		: "macl", "mach");
-	__delay(xloops * HZ);
+	__delay(xloops);
 }
 
 void __udelay(unsigned long usecs)

From f6a3c1ca00ce9a43942364a0cc15601b291df281 Mon Sep 17 00:00:00 2001
From: kogiidena <kogiidena@eggplant.ddo.jp>
Date: Tue, 8 May 2007 20:49:46 +0900
Subject: [PATCH 11/18] sh: landisk mv_nr_irqs definition.

Fix up the landisk build. When NR_IRQS was removed, landisk got missed
in the updates. Update the machvec for the landisk IRQs to get it
working again.

Signed-off-by: kogiidena <kogiidena@eggplant.ddo.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
 arch/sh/boards/landisk/setup.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/sh/boards/landisk/setup.c b/arch/sh/boards/landisk/setup.c
index a83a5d9587bb..4058b4f50d44 100644
--- a/arch/sh/boards/landisk/setup.c
+++ b/arch/sh/boards/landisk/setup.c
@@ -93,6 +93,7 @@ static void __init landisk_setup(char **cmdline_p)
  */
 struct sh_machine_vector mv_landisk __initmv = {
 	.mv_name = "LANDISK",
+	.mv_nr_irqs = 72,
 	.mv_setup = landisk_setup,
 	.mv_init_irq = init_landisk_IRQ,
 };

From 21ec4c6453790cb9bfa996ab8f27f22dd47c516a Mon Sep 17 00:00:00 2001
From: Paul Mundt <lethal@linux-sh.org>
Date: Wed, 9 May 2007 10:42:48 +0900
Subject: [PATCH 12/18] sh: Wire up utimensat syscall.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
 arch/sh/kernel/syscalls.S | 1 +
 include/asm-sh/unistd.h   | 5 +++--
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/arch/sh/kernel/syscalls.S b/arch/sh/kernel/syscalls.S
index 38fc8cd3ea3a..4357d1a6358f 100644
--- a/arch/sh/kernel/syscalls.S
+++ b/arch/sh/kernel/syscalls.S
@@ -354,3 +354,4 @@ ENTRY(sys_call_table)
 	.long sys_move_pages
 	.long sys_getcpu
 	.long sys_epoll_pwait
+	.long sys_utimensat		/* 320 */
diff --git a/include/asm-sh/unistd.h b/include/asm-sh/unistd.h
index 49be50a36b77..af71e379a5ee 100644
--- a/include/asm-sh/unistd.h
+++ b/include/asm-sh/unistd.h
@@ -85,7 +85,7 @@
 #define __NR_sigpending		 73
 #define __NR_sethostname	 74
 #define __NR_setrlimit		 75
-#define __NR_getrlimit	 	 76	/* Back compatible 2Gig limited rlimit */
+#define __NR_getrlimit		 76	/* Back compatible 2Gig limited rlimit */
 #define __NR_getrusage		 77
 #define __NR_gettimeofday	 78
 #define __NR_settimeofday	 79
@@ -328,8 +328,9 @@
 #define __NR_move_pages		317
 #define __NR_getcpu		318
 #define __NR_epoll_pwait	319
+#define __NR_utimensat		320
 
-#define NR_syscalls 320
+#define NR_syscalls 321
 
 #ifdef __KERNEL__
 

From b118ca572db5af832c6fc1af7b301105378d1a08 Mon Sep 17 00:00:00 2001
From: Paul Mundt <lethal@linux-sh.org>
Date: Wed, 9 May 2007 10:55:38 +0900
Subject: [PATCH 13/18] sh: Convert to common die chain.

This went in immediately after SH added the die chain notifiers,
so move over to that instead..

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
 arch/sh/kernel/process.c |  6 +++---
 arch/sh/kernel/traps.c   | 16 +---------------
 arch/sh/mm/fault.c       |  2 +-
 include/asm-sh/kdebug.h  | 25 ++-----------------------
 4 files changed, 7 insertions(+), 42 deletions(-)

diff --git a/arch/sh/kernel/process.c b/arch/sh/kernel/process.c
index 9005b2f12aaa..d755589ba8b1 100644
--- a/arch/sh/kernel/process.c
+++ b/arch/sh/kernel/process.c
@@ -15,7 +15,7 @@
 #include <linux/pm.h>
 #include <linux/kallsyms.h>
 #include <linux/kexec.h>
-#include <asm/kdebug.h>
+#include <linux/kdebug.h>
 #include <asm/uaccess.h>
 #include <asm/mmu_context.h>
 #include <asm/pgalloc.h>
@@ -500,7 +500,7 @@ asmlinkage void debug_trap_handler(unsigned long r4, unsigned long r5,
 	/* Rewind */
 	regs->pc -= instruction_size(ctrl_inw(regs->pc - 4));
 
-	if (notify_die(DIE_TRAP, regs, regs->tra & 0xff,
+	if (notify_die(DIE_TRAP, "debug trap", regs, 0, regs->tra & 0xff,
 		       SIGTRAP) == NOTIFY_STOP)
 		return;
 
@@ -519,7 +519,7 @@ asmlinkage void bug_trap_handler(unsigned long r4, unsigned long r5,
 	/* Rewind */
 	regs->pc -= instruction_size(ctrl_inw(regs->pc - 4));
 
-	if (notify_die(DIE_TRAP, regs, TRAPA_BUG_OPCODE & 0xff,
+	if (notify_die(DIE_TRAP, "bug trap", regs, 0, TRAPA_BUG_OPCODE & 0xff,
 		       SIGTRAP) == NOTIFY_STOP)
 		return;
 
diff --git a/arch/sh/kernel/traps.c b/arch/sh/kernel/traps.c
index 1446d12ba220..3a197649cd83 100644
--- a/arch/sh/kernel/traps.c
+++ b/arch/sh/kernel/traps.c
@@ -20,10 +20,10 @@
 #include <linux/io.h>
 #include <linux/bug.h>
 #include <linux/debug_locks.h>
+#include <linux/kdebug.h>
 #include <linux/limits.h>
 #include <asm/system.h>
 #include <asm/uaccess.h>
-#include <asm/kdebug.h>
 
 #ifdef CONFIG_SH_KGDB
 #include <asm/kgdb.h>
@@ -76,20 +76,6 @@ static void dump_mem(const char *str, unsigned long bottom, unsigned long top)
 	}
 }
 
-ATOMIC_NOTIFIER_HEAD(shdie_chain);
-
-int register_die_notifier(struct notifier_block *nb)
-{
-	return atomic_notifier_chain_register(&shdie_chain, nb);
-}
-EXPORT_SYMBOL(register_die_notifier);
-
-int unregister_die_notifier(struct notifier_block *nb)
-{
-	return atomic_notifier_chain_unregister(&shdie_chain, nb);
-}
-EXPORT_SYMBOL(unregister_die_notifier);
-
 static DEFINE_SPINLOCK(die_lock);
 
 void die(const char * str, struct pt_regs * regs, long err)
diff --git a/arch/sh/mm/fault.c b/arch/sh/mm/fault.c
index 0ecc117cade4..9207da67ff8a 100644
--- a/arch/sh/mm/fault.c
+++ b/arch/sh/mm/fault.c
@@ -15,7 +15,7 @@
 #include <linux/mm.h>
 #include <linux/hardirq.h>
 #include <linux/kprobes.h>
-#include <asm/kdebug.h>
+#include <linux/kdebug.h>
 #include <asm/system.h>
 #include <asm/mmu_context.h>
 #include <asm/tlbflush.h>
diff --git a/include/asm-sh/kdebug.h b/include/asm-sh/kdebug.h
index 493c20629747..16578b7c9da1 100644
--- a/include/asm-sh/kdebug.h
+++ b/include/asm-sh/kdebug.h
@@ -2,20 +2,6 @@
 #define __ASM_SH_KDEBUG_H
 
 #include <linux/notifier.h>
-#include <asm-generic/kdebug.h>
-
-struct pt_regs;
-
-struct die_args {
-	struct pt_regs *regs;
-	int trapnr;
-};
-
-int register_die_notifier(struct notifier_block *nb);
-int unregister_die_notifier(struct notifier_block *nb);
-int register_page_fault_notifier(struct notifier_block *nb);
-int unregister_page_fault_notifier(struct notifier_block *nb);
-extern struct atomic_notifier_head shdie_chain;
 
 /* Grossly misnamed. */
 enum die_val {
@@ -23,14 +9,7 @@ enum die_val {
 	DIE_PAGE_FAULT,
 };
 
-static inline int notify_die(enum die_val val, struct pt_regs *regs,
-			     int trap, int sig)
-{
-	struct die_args args = {
-		.regs = regs,
-		.trapnr = trap,
-	};
+int register_page_fault_notifier(struct notifier_block *nb);
+int unregister_page_fault_notifier(struct notifier_block *nb);
 
-	return atomic_notifier_call_chain(&shdie_chain, val, &args);
-}
 #endif /* __ASM_SH_KDEBUG_H */

From a361a68bc510b91b50462433cfa65c6b620a80c3 Mon Sep 17 00:00:00 2001
From: Paul Mundt <lethal@linux-sh.org>
Date: Wed, 9 May 2007 12:37:53 +0900
Subject: [PATCH 14/18] rtc: rtc-sh: Fix rtc_dev pointer for rtc_update_irq().

When the rtc_update_irq() callsites stopped passing in the
class_dev, the rtc_dev references weren't fixed. Fix it up,
so we pass in the proper pointer.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
 drivers/rtc/rtc-sh.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/rtc/rtc-sh.c b/drivers/rtc/rtc-sh.c
index bde3d34cb007..e0f91dfce0f5 100644
--- a/drivers/rtc/rtc-sh.c
+++ b/drivers/rtc/rtc-sh.c
@@ -104,7 +104,7 @@ static irqreturn_t sh_rtc_interrupt(int irq, void *dev_id)
 
 	writeb(tmp, rtc->regbase + RCR1);
 
-	rtc_update_irq(&rtc->rtc_dev, 1, events);
+	rtc_update_irq(rtc->rtc_dev, 1, events);
 
 	spin_unlock(&rtc->lock);
 
@@ -139,7 +139,7 @@ static irqreturn_t sh_rtc_alarm(int irq, void *dev_id)
 
 		rtc->rearm_aie = 1;
 
-		rtc_update_irq(&rtc->rtc_dev, 1, events);
+		rtc_update_irq(rtc->rtc_dev, 1, events);
 	}
 
 	spin_unlock(&rtc->lock);
@@ -153,7 +153,7 @@ static irqreturn_t sh_rtc_periodic(int irq, void *dev_id)
 
 	spin_lock(&rtc->lock);
 
-	rtc_update_irq(&rtc->rtc_dev, 1, RTC_PF | RTC_IRQF);
+	rtc_update_irq(rtc->rtc_dev, 1, RTC_PF | RTC_IRQF);
 
 	spin_unlock(&rtc->lock);
 

From 1ce7ddd5f4cc754b6afe9eec5cee89ede75348ea Mon Sep 17 00:00:00 2001
From: Paul Mundt <lethal@linux-sh.org>
Date: Wed, 9 May 2007 13:20:52 +0900
Subject: [PATCH 15/18] sh: Truncate MAX_ACTIVE_REGIONS for the common case.

Most SH platforms aren't going to need more than a single active
region, ones that need more can pad this out as necessary.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
 arch/sh/mm/Kconfig | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/sh/mm/Kconfig b/arch/sh/mm/Kconfig
index b773361892c9..253346d7b316 100644
--- a/arch/sh/mm/Kconfig
+++ b/arch/sh/mm/Kconfig
@@ -303,6 +303,10 @@ config NODES_SHIFT
 config ARCH_FLATMEM_ENABLE
 	def_bool y
 
+config MAX_ACTIVE_REGIONS
+	int
+	default "1"
+
 config ARCH_POPULATES_NODE_MAP
 	def_bool y
 

From 57be2b484a417bffae66359b9b89e7239480b729 Mon Sep 17 00:00:00 2001
From: Paul Mundt <lethal@linux-sh.org>
Date: Wed, 9 May 2007 17:33:24 +0900
Subject: [PATCH 16/18] sh: clockevent/clocksource/hrtimers/nohz TMU support.

This adds basic support for clockevents and clocksources,
presently only implemented for TMU-based systems (which
are the majority of SH-3 and SH-4 systems).

The old NO_IDLE_HZ implementation is also dropped completely,
the only users of this were on TMU-based systems anyways.

More work needs to be done to generalize the TMU handling,
in that the current implementation is rather tied to the
notion of TMU0 and TMU1 utilization.

Additionally, as more SH timers switch over to this scheme,
we'll be able to gut most of the remaining system timer
infrastructure that existed before.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
 arch/sh/Kconfig                   |  29 ++---
 arch/sh/kernel/process.c          |   3 +
 arch/sh/kernel/time.c             | 184 +++++++++------------------
 arch/sh/kernel/timers/timer-tmu.c | 198 ++++++++++++++++++------------
 include/asm-sh/timer.h            |  25 +---
 5 files changed, 192 insertions(+), 247 deletions(-)

diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig
index d74eb120a9c6..038179ecf6a9 100644
--- a/arch/sh/Kconfig
+++ b/arch/sh/Kconfig
@@ -52,6 +52,9 @@ config GENERIC_IOMAP
 config GENERIC_TIME
 	def_bool n
 
+config GENERIC_CLOCKEVENTS
+	def_bool n
+
 config SYS_SUPPORTS_APM_EMULATION
 	bool
 
@@ -436,11 +439,11 @@ endmenu
 
 menu "Timer and clock configuration"
 
-if !GENERIC_TIME
-
 config SH_TMU
 	bool "TMU timer support"
 	depends on CPU_SH3 || CPU_SH4
+	select GENERIC_TIME
+	select GENERIC_CLOCKEVENTS
 	default y
 	help
 	  This enables the use of the TMU as the system timer.
@@ -459,8 +462,6 @@ config SH_MTU2
 	help
 	  This enables the use of the MTU2 as the system timer.
 
-endif
-
 config SH_TIMER_IRQ
 	int
 	default "28" if CPU_SUBTYPE_SH7780 || CPU_SUBTYPE_SH7785
@@ -468,24 +469,6 @@ config SH_TIMER_IRQ
 	default "140" if CPU_SUBTYPE_SH7206
 	default "16"
 
-config NO_IDLE_HZ
-	bool "Dynamic tick timer"
-	help
-	  Select this option if you want to disable continuous timer ticks
-	  and have them programmed to occur as required. This option saves
-	  power as the system can remain in idle state for longer.
-
-	  By default dynamic tick is disabled during the boot, and can be
-	  manually enabled with:
-
-	    echo 1 > /sys/devices/system/timer/timer0/dyn_tick
-
-	  Alternatively, if you want dynamic tick automatically enabled
-	  during boot, pass "dyntick=enable" via the kernel command string.
-
-	  Please note that dynamic tick may affect the accuracy of
-	  timekeeping on some platforms depending on the implementation.
-
 config SH_PCLK_FREQ
 	int "Peripheral clock frequency (in Hz)"
 	default "27000000" if CPU_SUBTYPE_SH73180 || CPU_SUBTYPE_SH7343
@@ -509,6 +492,8 @@ config SH_CLK_MD
 	help
 	  MD2 - MD0 pin setting.
 
+source "kernel/time/Kconfig"
+
 endmenu
 
 menu "CPU Frequency scaling"
diff --git a/arch/sh/kernel/process.c b/arch/sh/kernel/process.c
index d755589ba8b1..6b4f5748d0be 100644
--- a/arch/sh/kernel/process.c
+++ b/arch/sh/kernel/process.c
@@ -16,6 +16,7 @@
 #include <linux/kallsyms.h>
 #include <linux/kexec.h>
 #include <linux/kdebug.h>
+#include <linux/tick.h>
 #include <asm/uaccess.h>
 #include <asm/mmu_context.h>
 #include <asm/pgalloc.h>
@@ -60,8 +61,10 @@ void cpu_idle(void)
 		if (!idle)
 			idle = default_idle;
 
+		tick_nohz_stop_sched_tick();
 		while (!need_resched())
 			idle();
+		tick_nohz_restart_sched_tick();
 
 		preempt_enable_no_resched();
 		schedule();
diff --git a/arch/sh/kernel/time.c b/arch/sh/kernel/time.c
index d47e775962e9..a3a67d151e52 100644
--- a/arch/sh/kernel/time.c
+++ b/arch/sh/kernel/time.c
@@ -3,7 +3,7 @@
  *
  *  Copyright (C) 1999  Tetsuya Okada & Niibe Yutaka
  *  Copyright (C) 2000  Philipp Rumpf <prumpf@tux.org>
- *  Copyright (C) 2002 - 2006  Paul Mundt
+ *  Copyright (C) 2002 - 2007  Paul Mundt
  *  Copyright (C) 2002  M. R. Brown  <mrbrown@linux-sh.org>
  *
  *  Some code taken from i386 version.
@@ -15,6 +15,7 @@
 #include <linux/profile.h>
 #include <linux/timex.h>
 #include <linux/sched.h>
+#include <linux/clockchips.h>
 #include <asm/clock.h>
 #include <asm/rtc.h>
 #include <asm/timer.h>
@@ -38,6 +39,14 @@ static int null_rtc_set_time(const time_t secs)
 	return 0;
 }
 
+/*
+ * Null high precision timer functions for systems lacking one.
+ */
+static cycle_t null_hpt_read(void)
+{
+	return 0;
+}
+
 void (*rtc_sh_get_time)(struct timespec *) = null_rtc_get_time;
 int (*rtc_sh_set_time)(const time_t) = null_rtc_set_time;
 
@@ -101,6 +110,7 @@ int do_settimeofday(struct timespec *tv)
 EXPORT_SYMBOL(do_settimeofday);
 #endif /* !CONFIG_GENERIC_TIME */
 
+#ifndef CONFIG_GENERIC_CLOCKEVENTS
 /* last time the RTC clock got updated */
 static long last_rtc_update;
 
@@ -138,6 +148,7 @@ void handle_timer_tick(void)
 			last_rtc_update = xtime.tv_sec - 600;
 	}
 }
+#endif /* !CONFIG_GENERIC_CLOCKEVENTS */
 
 #ifdef CONFIG_PM
 int timer_suspend(struct sys_device *dev, pm_message_t state)
@@ -168,108 +179,6 @@ static struct sysdev_class timer_sysclass = {
 	.resume	 = timer_resume,
 };
 
-#ifdef CONFIG_NO_IDLE_HZ
-static int timer_dyn_tick_enable(void)
-{
-	struct dyn_tick_timer *dyn_tick = sys_timer->dyn_tick;
-	unsigned long flags;
-	int ret = -ENODEV;
-
-	if (dyn_tick) {
-		spin_lock_irqsave(&dyn_tick->lock, flags);
-		ret = 0;
-		if (!(dyn_tick->state & DYN_TICK_ENABLED)) {
-			ret = dyn_tick->enable();
-
-			if (ret == 0)
-				dyn_tick->state |= DYN_TICK_ENABLED;
-		}
-		spin_unlock_irqrestore(&dyn_tick->lock, flags);
-	}
-
-	return ret;
-}
-
-static int timer_dyn_tick_disable(void)
-{
-	struct dyn_tick_timer *dyn_tick = sys_timer->dyn_tick;
-	unsigned long flags;
-	int ret = -ENODEV;
-
-	if (dyn_tick) {
-		spin_lock_irqsave(&dyn_tick->lock, flags);
-		ret = 0;
-		if (dyn_tick->state & DYN_TICK_ENABLED) {
-			ret = dyn_tick->disable();
-
-			if (ret == 0)
-				dyn_tick->state &= ~DYN_TICK_ENABLED;
-		}
-		spin_unlock_irqrestore(&dyn_tick->lock, flags);
-	}
-
-	return ret;
-}
-
-/*
- * Reprogram the system timer for at least the calculated time interval.
- * This function should be called from the idle thread with IRQs disabled,
- * immediately before sleeping.
- */
-void timer_dyn_reprogram(void)
-{
-	struct dyn_tick_timer *dyn_tick = sys_timer->dyn_tick;
-	unsigned long next, seq, flags;
-
-	if (!dyn_tick)
-		return;
-
-	spin_lock_irqsave(&dyn_tick->lock, flags);
-	if (dyn_tick->state & DYN_TICK_ENABLED) {
-		next = next_timer_interrupt();
-		do {
-			seq = read_seqbegin(&xtime_lock);
-			dyn_tick->reprogram(next - jiffies);
-		} while (read_seqretry(&xtime_lock, seq));
-	}
-	spin_unlock_irqrestore(&dyn_tick->lock, flags);
-}
-
-static ssize_t timer_show_dyn_tick(struct sys_device *dev, char *buf)
-{
-	return sprintf(buf, "%i\n",
-		       (sys_timer->dyn_tick->state & DYN_TICK_ENABLED) >> 1);
-}
-
-static ssize_t timer_set_dyn_tick(struct sys_device *dev, const char *buf,
-				  size_t count)
-{
-	unsigned int enable = simple_strtoul(buf, NULL, 2);
-
-	if (enable)
-		timer_dyn_tick_enable();
-	else
-		timer_dyn_tick_disable();
-
-	return count;
-}
-static SYSDEV_ATTR(dyn_tick, 0644, timer_show_dyn_tick, timer_set_dyn_tick);
-
-/*
- * dyntick=enable|disable
- */
-static char dyntick_str[4] __initdata = "";
-
-static int __init dyntick_setup(char *str)
-{
-	if (str)
-		strlcpy(dyntick_str, str, sizeof(dyntick_str));
-	return 1;
-}
-
-__setup("dyntick=", dyntick_setup);
-#endif
-
 static int __init timer_init_sysfs(void)
 {
 	int ret = sysdev_class_register(&timer_sysclass);
@@ -277,27 +186,51 @@ static int __init timer_init_sysfs(void)
 		return ret;
 
 	sys_timer->dev.cls = &timer_sysclass;
-	ret = sysdev_register(&sys_timer->dev);
-
-#ifdef CONFIG_NO_IDLE_HZ
-	if (ret == 0 && sys_timer->dyn_tick) {
-		ret = sysdev_create_file(&sys_timer->dev, &attr_dyn_tick);
-
-		/*
-		 * Turn on dynamic tick after calibrate delay
-		 * for correct bogomips
-		 */
-		if (ret == 0 && dyntick_str[0] == 'e')
-			ret = timer_dyn_tick_enable();
-	}
-#endif
-
-	return ret;
+	return sysdev_register(&sys_timer->dev);
 }
 device_initcall(timer_init_sysfs);
 
 void (*board_time_init)(void);
 
+/*
+ * Shamelessly based on the MIPS and Sparc64 work.
+ */
+static unsigned long timer_ticks_per_nsec_quotient __read_mostly;
+unsigned long sh_hpt_frequency = 0;
+
+#define NSEC_PER_CYC_SHIFT	10
+
+struct clocksource clocksource_sh = {
+	.name		= "SuperH",
+	.rating		= 200,
+	.mask		= CLOCKSOURCE_MASK(32),
+	.read		= null_hpt_read,
+	.shift		= 16,
+	.flags		= CLOCK_SOURCE_IS_CONTINUOUS,
+};
+
+static void __init init_sh_clocksource(void)
+{
+	if (!sh_hpt_frequency || clocksource_sh.read == null_hpt_read)
+		return;
+
+	clocksource_sh.mult = clocksource_hz2mult(sh_hpt_frequency,
+						  clocksource_sh.shift);
+
+	timer_ticks_per_nsec_quotient =
+		clocksource_hz2mult(sh_hpt_frequency, NSEC_PER_CYC_SHIFT);
+
+	clocksource_register(&clocksource_sh);
+}
+
+#ifdef CONFIG_GENERIC_TIME
+unsigned long long sched_clock(void)
+{
+	unsigned long long ticks = clocksource_sh.read();
+	return (ticks * timer_ticks_per_nsec_quotient) >> NSEC_PER_CYC_SHIFT;
+}
+#endif
+
 void __init time_init(void)
 {
 	if (board_time_init)
@@ -316,10 +249,15 @@ void __init time_init(void)
 	sys_timer = get_sys_timer();
 	printk(KERN_INFO "Using %s for system timer\n", sys_timer->name);
 
-#ifdef CONFIG_NO_IDLE_HZ
-	if (sys_timer->dyn_tick)
-		spin_lock_init(&sys_timer->dyn_tick->lock);
-#endif
+	if (sys_timer->ops->read)
+		clocksource_sh.read = sys_timer->ops->read;
+
+	init_sh_clocksource();
+
+	if (sh_hpt_frequency)
+		printk("Using %lu.%03lu MHz high precision timer.\n",
+		       ((sh_hpt_frequency + 500) / 1000) / 1000,
+		       ((sh_hpt_frequency + 500) / 1000) % 1000);
 
 #if defined(CONFIG_SH_KGDB)
 	/*
diff --git a/arch/sh/kernel/timers/timer-tmu.c b/arch/sh/kernel/timers/timer-tmu.c
index d9e3151c891e..2d997e2a5b6c 100644
--- a/arch/sh/kernel/timers/timer-tmu.c
+++ b/arch/sh/kernel/timers/timer-tmu.c
@@ -1,7 +1,7 @@
 /*
  * arch/sh/kernel/timers/timer-tmu.c - TMU Timer Support
  *
- *  Copyright (C) 2005  Paul Mundt
+ *  Copyright (C) 2005 - 2007  Paul Mundt
  *
  * TMU handling code hacked out of arch/sh/kernel/time.c
  *
@@ -18,6 +18,7 @@
 #include <linux/kernel.h>
 #include <linux/interrupt.h>
 #include <linux/seqlock.h>
+#include <linux/clockchips.h>
 #include <asm/timer.h>
 #include <asm/rtc.h>
 #include <asm/io.h>
@@ -25,56 +26,75 @@
 #include <asm/clock.h>
 
 #define TMU_TOCR_INIT	0x00
-#define TMU0_TCR_INIT	0x0020
-#define TMU_TSTR_INIT	1
+#define TMU_TCR_INIT	0x0020
 
-#define TMU0_TCR_CALIB	0x0000
-
-static unsigned long tmu_timer_get_offset(void)
+static int tmu_timer_start(void)
 {
-	int count;
-	static int count_p = 0x7fffffff;    /* for the first call after boot */
-	static unsigned long jiffies_p = 0;
-
-	/*
-	 * cache volatile jiffies temporarily; we have IRQs turned off.
-	 */
-	unsigned long jiffies_t;
-
-	/* timer count may underflow right here */
-	count = ctrl_inl(TMU0_TCNT);	/* read the latched count */
-
-	jiffies_t = jiffies;
-
-	/*
-	 * avoiding timer inconsistencies (they are rare, but they happen)...
-	 * there is one kind of problem that must be avoided here:
-	 *  1. the timer counter underflows
-	 */
-
-	if (jiffies_t == jiffies_p) {
-		if (count > count_p) {
-			/* the nutcase */
-			if (ctrl_inw(TMU0_TCR) & 0x100) { /* Check UNF bit */
-				count -= LATCH;
-			} else {
-				printk("%s (): hardware timer problem?\n",
-				       __FUNCTION__);
-			}
-		}
-	} else
-		jiffies_p = jiffies_t;
-
-	count_p = count;
-
-	count = ((LATCH-1) - count) * TICK_SIZE;
-	count = (count + LATCH/2) / LATCH;
-
-	return count;
+	ctrl_outb(ctrl_inb(TMU_TSTR) | 0x3, TMU_TSTR);
+	return 0;
 }
 
+static void tmu0_timer_set_interval(unsigned long interval, unsigned int reload)
+{
+	ctrl_outl(interval, TMU0_TCNT);
+
+	/*
+	 * TCNT reloads from TCOR on underflow, clear it if we don't
+	 * intend to auto-reload
+	 */
+	if (reload)
+		ctrl_outl(interval, TMU0_TCOR);
+	else
+		ctrl_outl(0, TMU0_TCOR);
+
+	tmu_timer_start();
+}
+
+static int tmu_timer_stop(void)
+{
+	ctrl_outb(ctrl_inb(TMU_TSTR) & ~0x3, TMU_TSTR);
+	return 0;
+}
+
+static cycle_t tmu_timer_read(void)
+{
+	return ~ctrl_inl(TMU1_TCNT);
+}
+
+static int tmu_set_next_event(unsigned long cycles,
+			      struct clock_event_device *evt)
+{
+	tmu0_timer_set_interval(cycles, 1);
+	return 0;
+}
+
+static void tmu_set_mode(enum clock_event_mode mode,
+			 struct clock_event_device *evt)
+{
+	switch (mode) {
+	case CLOCK_EVT_MODE_PERIODIC:
+		ctrl_outl(ctrl_inl(TMU0_TCNT), TMU0_TCOR);
+		break;
+	case CLOCK_EVT_MODE_ONESHOT:
+		ctrl_outl(0, TMU0_TCOR);
+		break;
+	case CLOCK_EVT_MODE_UNUSED:
+	case CLOCK_EVT_MODE_SHUTDOWN:
+		break;
+	}
+}
+
+static struct clock_event_device tmu0_clockevent = {
+	.name		= "tmu0",
+	.shift		= 32,
+	.features	= CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT,
+	.set_mode	= tmu_set_mode,
+	.set_next_event	= tmu_set_next_event,
+};
+
 static irqreturn_t tmu_timer_interrupt(int irq, void *dummy)
 {
+	struct clock_event_device *evt = &tmu0_clockevent;
 	unsigned long timer_status;
 
 	/* Clear UNF bit */
@@ -82,72 +102,76 @@ static irqreturn_t tmu_timer_interrupt(int irq, void *dummy)
 	timer_status &= ~0x100;
 	ctrl_outw(timer_status, TMU0_TCR);
 
-	/*
-	 * Here we are in the timer irq handler. We just have irqs locally
-	 * disabled but we don't know if the timer_bh is running on the other
-	 * CPU. We need to avoid to SMP race with it. NOTE: we don' t need
-	 * the irq version of write_lock because as just said we have irq
-	 * locally disabled. -arca
-	 */
-	write_seqlock(&xtime_lock);
-	handle_timer_tick();
-	write_sequnlock(&xtime_lock);
+	evt->event_handler(evt);
 
 	return IRQ_HANDLED;
 }
 
-static struct irqaction tmu_irq = {
-	.name		= "timer",
+static struct irqaction tmu0_irq = {
+	.name		= "periodic timer",
 	.handler	= tmu_timer_interrupt,
 	.flags		= IRQF_DISABLED | IRQF_TIMER | IRQF_IRQPOLL,
 	.mask		= CPU_MASK_NONE,
 };
 
-static void tmu_clk_init(struct clk *clk)
+static void tmu0_clk_init(struct clk *clk)
 {
-	u8 divisor = TMU0_TCR_INIT & 0x7;
-	ctrl_outw(TMU0_TCR_INIT, TMU0_TCR);
+	u8 divisor = TMU_TCR_INIT & 0x7;
+	ctrl_outw(TMU_TCR_INIT, TMU0_TCR);
 	clk->rate = clk->parent->rate / (4 << (divisor << 1));
 }
 
-static void tmu_clk_recalc(struct clk *clk)
+static void tmu0_clk_recalc(struct clk *clk)
 {
 	u8 divisor = ctrl_inw(TMU0_TCR) & 0x7;
 	clk->rate = clk->parent->rate / (4 << (divisor << 1));
 }
 
-static struct clk_ops tmu_clk_ops = {
-	.init		= tmu_clk_init,
-	.recalc		= tmu_clk_recalc,
+static struct clk_ops tmu0_clk_ops = {
+	.init		= tmu0_clk_init,
+	.recalc		= tmu0_clk_recalc,
 };
 
 static struct clk tmu0_clk = {
 	.name		= "tmu0_clk",
-	.ops		= &tmu_clk_ops,
+	.ops		= &tmu0_clk_ops,
 };
 
-static int tmu_timer_start(void)
+static void tmu1_clk_init(struct clk *clk)
 {
-	ctrl_outb(TMU_TSTR_INIT, TMU_TSTR);
-	return 0;
+	u8 divisor = TMU_TCR_INIT & 0x7;
+	ctrl_outw(divisor, TMU1_TCR);
+	clk->rate = clk->parent->rate / (4 << (divisor << 1));
 }
 
-static int tmu_timer_stop(void)
+static void tmu1_clk_recalc(struct clk *clk)
 {
-	ctrl_outb(0, TMU_TSTR);
-	return 0;
+	u8 divisor = ctrl_inw(TMU1_TCR) & 0x7;
+	clk->rate = clk->parent->rate / (4 << (divisor << 1));
 }
 
+static struct clk_ops tmu1_clk_ops = {
+	.init		= tmu1_clk_init,
+	.recalc		= tmu1_clk_recalc,
+};
+
+static struct clk tmu1_clk = {
+	.name		= "tmu1_clk",
+	.ops		= &tmu1_clk_ops,
+};
+
 static int tmu_timer_init(void)
 {
 	unsigned long interval;
+	unsigned long frequency;
 
-	setup_irq(CONFIG_SH_TIMER_IRQ, &tmu_irq);
+	setup_irq(CONFIG_SH_TIMER_IRQ, &tmu0_irq);
 
 	tmu0_clk.parent = clk_get(NULL, "module_clk");
+	tmu1_clk.parent = clk_get(NULL, "module_clk");
 
-	/* Start TMU0 */
 	tmu_timer_stop();
+
 #if !defined(CONFIG_CPU_SUBTYPE_SH7300) && \
     !defined(CONFIG_CPU_SUBTYPE_SH7760) && \
     !defined(CONFIG_CPU_SUBTYPE_SH7785)
@@ -155,15 +179,29 @@ static int tmu_timer_init(void)
 #endif
 
 	clk_register(&tmu0_clk);
+	clk_register(&tmu1_clk);
 	clk_enable(&tmu0_clk);
+	clk_enable(&tmu1_clk);
 
-	interval = (clk_get_rate(&tmu0_clk) + HZ / 2) / HZ;
-	printk(KERN_INFO "Interval = %ld\n", interval);
+	frequency = clk_get_rate(&tmu0_clk);
+	interval = (frequency + HZ / 2) / HZ;
 
-	ctrl_outl(interval, TMU0_TCOR);
-	ctrl_outl(interval, TMU0_TCNT);
+	sh_hpt_frequency = clk_get_rate(&tmu1_clk);
+	ctrl_outl(~0, TMU1_TCNT);
+	ctrl_outl(~0, TMU1_TCOR);
 
-	tmu_timer_start();
+	tmu0_timer_set_interval(interval, 1);
+
+	tmu0_clockevent.mult = div_sc(frequency, NSEC_PER_SEC,
+				      tmu0_clockevent.shift);
+	tmu0_clockevent.max_delta_ns =
+			clockevent_delta2ns(-1, &tmu0_clockevent);
+	tmu0_clockevent.min_delta_ns =
+			clockevent_delta2ns(1, &tmu0_clockevent);
+
+	tmu0_clockevent.cpumask = cpumask_of_cpu(0);
+
+	clockevents_register_device(&tmu0_clockevent);
 
 	return 0;
 }
@@ -172,9 +210,7 @@ struct sys_timer_ops tmu_timer_ops = {
 	.init		= tmu_timer_init,
 	.start		= tmu_timer_start,
 	.stop		= tmu_timer_stop,
-#ifndef CONFIG_GENERIC_TIME
-	.get_offset	= tmu_timer_get_offset,
-#endif
+	.read		= tmu_timer_read,
 };
 
 struct sys_timer tmu_timer = {
diff --git a/include/asm-sh/timer.h b/include/asm-sh/timer.h
index 17b5e76a4c31..701ba84c7049 100644
--- a/include/asm-sh/timer.h
+++ b/include/asm-sh/timer.h
@@ -2,12 +2,14 @@
 #define __ASM_SH_TIMER_H
 
 #include <linux/sysdev.h>
+#include <linux/clocksource.h>
 #include <asm/cpu/timer.h>
 
 struct sys_timer_ops {
 	int (*init)(void);
 	int (*start)(void);
 	int (*stop)(void);
+	cycle_t (*read)(void);
 #ifndef CONFIG_GENERIC_TIME
 	unsigned long (*get_offset)(void);
 #endif
@@ -18,29 +20,8 @@ struct sys_timer {
 
 	struct sys_device	dev;
 	struct sys_timer_ops	*ops;
-
-#ifdef CONFIG_NO_IDLE_HZ
-	struct dyn_tick_timer	*dyn_tick;
-#endif
 };
 
-#ifdef CONFIG_NO_IDLE_HZ
-#define DYN_TICK_ENABLED	(1 << 1)
-
-struct dyn_tick_timer {
-	spinlock_t	lock;
-	unsigned int	state;			/* Current state */
-	int		(*enable)(void);	/* Enables dynamic tick */
-	int		(*disable)(void);	/* Disables dynamic tick */
-	void		(*reprogram)(unsigned long); /* Reprograms the timer */
-	int		(*handler)(int, void *);
-};
-
-void timer_dyn_reprogram(void);
-#else
-#define timer_dyn_reprogram()	do { } while (0)
-#endif
-
 #define TICK_SIZE (tick_nsec / 1000)
 
 extern struct sys_timer tmu_timer, cmt_timer, mtu2_timer;
@@ -58,5 +39,7 @@ struct sys_timer *get_sys_timer(void);
 
 /* arch/sh/kernel/time.c */
 void handle_timer_tick(void);
+extern unsigned long sh_hpt_frequency;
+extern struct clocksource clocksource_sh;
 
 #endif /* __ASM_SH_TIMER_H */

From fc467a2623029976899261d6d379779c950ddcba Mon Sep 17 00:00:00 2001
From: Manuel Lauss <mano@roarinelk.homelinux.net>
Date: Wed, 9 May 2007 17:36:15 +0900
Subject: [PATCH 17/18] sh: SH7760 DMABRG support.

The DMABRG is a special DMA unit within the SH7760 which does data
transfers from main memory to Audio units and USB shared memory.
It has 3 IRQ lines which generate 10 events, which have to be masked
unmasked and acked in a single 32bit register. It works independently
from the tradition SH DMAC, but blocks usage of DMAC channel 0.

This patch adds 2 functions to associate callbacks with DMABRG events
and initialization.

Signed-off-by: Manuel Lauss <mano@roarinelk.homelinux.net>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
 arch/sh/drivers/Makefile     |   3 +-
 arch/sh/drivers/dma/Kconfig  |  20 ++--
 arch/sh/drivers/dma/Makefile |   4 +-
 arch/sh/drivers/dma/dmabrg.c | 196 +++++++++++++++++++++++++++++++++++
 include/asm-sh/dmabrg.h      |  23 ++++
 5 files changed, 237 insertions(+), 9 deletions(-)
 create mode 100644 arch/sh/drivers/dma/dmabrg.c
 create mode 100644 include/asm-sh/dmabrg.h

diff --git a/arch/sh/drivers/Makefile b/arch/sh/drivers/Makefile
index 6cb92676c5fc..e13f06bebd92 100644
--- a/arch/sh/drivers/Makefile
+++ b/arch/sh/drivers/Makefile
@@ -2,8 +2,9 @@
 # Makefile for the Linux SuperH-specific device drivers.
 #
 
+obj-y		+= dma/
+
 obj-$(CONFIG_PCI)		+= pci/
-obj-$(CONFIG_SH_DMA)		+= dma/
 obj-$(CONFIG_SUPERHYWAY)	+= superhyway/
 obj-$(CONFIG_PUSH_SWITCH)	+= push-switch.o
 obj-$(CONFIG_HEARTBEAT)		+= heartbeat.o
diff --git a/arch/sh/drivers/dma/Kconfig b/arch/sh/drivers/dma/Kconfig
index defc13c37d48..99935f9daf4b 100644
--- a/arch/sh/drivers/dma/Kconfig
+++ b/arch/sh/drivers/dma/Kconfig
@@ -1,12 +1,12 @@
 menu "DMA support"
 
-config SH_DMA
-	bool "DMA controller (DMAC) support"
-	help
-	  Selecting this option will provide same API as PC's Direct Memory
-	  Access Controller(8237A) for SuperH DMAC.
+config SH_DMA_API
+	bool
 
-	  If unsure, say N.
+config SH_DMA
+	bool "SuperH on-chip DMA controller (DMAC) support"
+	select SH_DMA_API
+	default n
 
 config NR_ONCHIP_DMA_CHANNELS
 	depends on SH_DMA
@@ -53,4 +53,12 @@ config DMA_PAGE_OPS_CHANNEL
 	  in case channel 3 is unavailable. On the SH4, channels 1,2, and 3
 	  are dual-address capable.
 
+config SH_DMABRG
+	bool "SH7760 DMABRG support"
+	depends on CPU_SUBTYPE_SH7760
+	help
+	  The DMABRG does data transfers from main memory to Audio/USB units
+	  of the SH7760.
+	  Say Y if you want to use Audio/USB DMA on your SH7760 board.
+
 endmenu
diff --git a/arch/sh/drivers/dma/Makefile b/arch/sh/drivers/dma/Makefile
index db1295d32268..1ac812d24488 100644
--- a/arch/sh/drivers/dma/Makefile
+++ b/arch/sh/drivers/dma/Makefile
@@ -2,8 +2,8 @@
 # Makefile for the SuperH DMA specific kernel interface routines under Linux.
 #
 
-obj-y				+= dma-api.o
+obj-$(CONFIG_SH_DMA_API)	+= dma-api.o dma-sysfs.o
 obj-$(CONFIG_ISA_DMA_API)	+= dma-isa.o
-obj-$(CONFIG_SYSFS)		+= dma-sysfs.o
 obj-$(CONFIG_SH_DMA)		+= dma-sh.o
 obj-$(CONFIG_SH_DREAMCAST)	+= dma-pvr2.o dma-g2.o
+obj-$(CONFIG_SH_DMABRG)		+= dmabrg.o
diff --git a/arch/sh/drivers/dma/dmabrg.c b/arch/sh/drivers/dma/dmabrg.c
new file mode 100644
index 000000000000..9d0a29370f21
--- /dev/null
+++ b/arch/sh/drivers/dma/dmabrg.c
@@ -0,0 +1,196 @@
+/*
+ * SH7760 DMABRG IRQ handling
+ *
+ * (c) 2007 MSC Vertriebsges.m.b.H, Manuel Lauss <mlau@msc-ge.com>
+ *  licensed under the GPLv2.
+ *
+ */
+
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <asm/dma.h>
+#include <asm/dmabrg.h>
+#include <asm/io.h>
+
+/*
+ * The DMABRG is a special DMA unit within the SH7760. It does transfers
+ * from USB-SRAM/Audio units to main memory (and also the LCDC; but that
+ * part is sensibly placed  in the LCDC  registers and requires no irqs)
+ * It has 3 IRQ lines which trigger 10 events, and works independently
+ * from the traditional SH DMAC (although it blocks usage of DMAC 0)
+ *
+ * BRGIRQID   | component | dir | meaning      | source
+ * -----------------------------------------------------
+ *     0      | USB-DMA   | ... | xfer done    | DMABRGI1
+ *     1      | USB-UAE   | ... | USB addr err.| DMABRGI0
+ *     2      | HAC0/SSI0 | play| all done     | DMABRGI1
+ *     3      | HAC0/SSI0 | play| half done    | DMABRGI2
+ *     4      | HAC0/SSI0 | rec | all done     | DMABRGI1
+ *     5      | HAC0/SSI0 | rec | half done    | DMABRGI2
+ *     6      | HAC1/SSI1 | play| all done     | DMABRGI1
+ *     7      | HAC1/SSI1 | play| half done    | DMABRGI2
+ *     8      | HAC1/SSI1 | rec | all done     | DMABRGI1
+ *     9      | HAC1/SSI1 | rec | half done    | DMABRGI2
+ *
+ * all can be enabled/disabled in the DMABRGCR register,
+ * as well as checked if they occured.
+ *
+ * DMABRGI0 services  USB  DMA  Address  errors,  but it still must be
+ * enabled/acked in the DMABRGCR register.  USB-DMA complete indicator
+ * is grouped together with the audio buffer end indicators, too bad...
+ *
+ * DMABRGCR:	Bits 31-24: audio-dma ENABLE flags,
+ *		Bits 23-16: audio-dma STATUS flags,
+ *		Bits  9-8:  USB error/xfer ENABLE,
+ *		Bits  1-0:  USB error/xfer STATUS.
+ *	Ack an IRQ by writing 0 to the STATUS flag.
+ *	Mask IRQ by writing 0 to ENABLE flag.
+ *
+ * Usage is almost like with any other IRQ:
+ *  dmabrg_request_irq(BRGIRQID, handler, data)
+ *  dmabrg_free_irq(BRGIRQID)
+ *
+ * handler prototype:  void brgirqhandler(void *data)
+ */
+
+#define DMARSRA		0xfe090000
+#define DMAOR		0xffa00040
+#define DMACHCR0	0xffa0000c
+#define DMABRGCR	0xfe3c0000
+
+#define DMAOR_BRG	0x0000c000
+#define DMAOR_DMEN	0x00000001
+
+#define DMABRGI0	68
+#define DMABRGI1	69
+#define DMABRGI2	70
+
+struct dmabrg_handler {
+	void (*handler)(void *);
+	void *data;
+} *dmabrg_handlers;
+
+static inline void dmabrg_call_handler(int i)
+{
+	dmabrg_handlers[i].handler(dmabrg_handlers[i].data);
+}
+
+/*
+ * main DMABRG irq handler. It acks irqs and then
+ * handles every set and unmasked bit sequentially.
+ * No locking and no validity checks; it should be
+ * as fast as possible (audio!)
+ */
+static irqreturn_t dmabrg_irq(int irq, void *data)
+{
+	unsigned long dcr;
+	unsigned int i;
+
+	dcr = ctrl_inl(DMABRGCR);
+	ctrl_outl(dcr & ~0x00ff0003, DMABRGCR);	/* ack all */
+	dcr &= dcr >> 8;	/* ignore masked */
+
+	/* USB stuff, get it out of the way first */
+	if (dcr & 1)
+		dmabrg_call_handler(DMABRGIRQ_USBDMA);
+	if (dcr & 2)
+		dmabrg_call_handler(DMABRGIRQ_USBDMAERR);
+
+	/* Audio */
+	dcr >>= 16;
+	while (dcr) {
+		i = __ffs(dcr);
+		dcr &= dcr - 1;
+		dmabrg_call_handler(i + DMABRGIRQ_A0TXF);
+	}
+	return IRQ_HANDLED;
+}
+
+static void dmabrg_disable_irq(unsigned int dmairq)
+{
+	unsigned long dcr;
+	dcr = ctrl_inl(DMABRGCR);
+	dcr &= ~(1 << ((dmairq > 1) ? dmairq + 22 : dmairq + 8));
+	ctrl_outl(dcr, DMABRGCR);
+}
+
+static void dmabrg_enable_irq(unsigned int dmairq)
+{
+	unsigned long dcr;
+	dcr = ctrl_inl(DMABRGCR);
+	dcr |= (1 << ((dmairq > 1) ? dmairq + 22 : dmairq + 8));
+	ctrl_outl(dcr, DMABRGCR);
+}
+
+int dmabrg_request_irq(unsigned int dmairq, void(*handler)(void*),
+		       void *data)
+{
+	if ((dmairq > 9) || !handler)
+		return -ENOENT;
+	if (dmabrg_handlers[dmairq].handler)
+		return -EBUSY;
+
+	dmabrg_handlers[dmairq].handler = handler;
+	dmabrg_handlers[dmairq].data = data;
+	
+	dmabrg_enable_irq(dmairq);
+	return 0;
+}
+EXPORT_SYMBOL_GPL(dmabrg_request_irq);
+
+void dmabrg_free_irq(unsigned int dmairq)
+{
+	if (likely(dmairq < 10)) {
+		dmabrg_disable_irq(dmairq);
+		dmabrg_handlers[dmairq].handler = NULL;
+		dmabrg_handlers[dmairq].data = NULL;
+	}
+}
+EXPORT_SYMBOL_GPL(dmabrg_free_irq);
+
+static int __init dmabrg_init(void)
+{
+	unsigned long or;
+	int ret;
+
+	dmabrg_handlers = kzalloc(10 * sizeof(struct dmabrg_handler),
+				  GFP_KERNEL);
+	if (!dmabrg_handlers)
+		return -ENOMEM;
+
+#ifdef CONFIG_SH_DMA
+	/* request DMAC channel 0 before anyone else can get it */
+	ret = request_dma(0, "DMAC 0 (DMABRG)");
+	if (ret < 0)
+		printk(KERN_INFO "DMABRG: DMAC ch0 not reserved!\n");
+#endif
+
+	ctrl_outl(0, DMABRGCR);
+	ctrl_outl(0, DMACHCR0);
+	ctrl_outl(0x94000000, DMARSRA);	/* enable DMABRG in DMAC 0 */
+
+	/* enable DMABRG mode, enable the DMAC */
+	or = ctrl_inl(DMAOR);
+	ctrl_outl(or | DMAOR_BRG | DMAOR_DMEN, DMAOR);
+
+	ret = request_irq(DMABRGI0, dmabrg_irq, IRQF_DISABLED,
+			"DMABRG USB address error", NULL);
+	if (ret)
+		goto out0;
+
+	ret = request_irq(DMABRGI1, dmabrg_irq, IRQF_DISABLED,
+			"DMABRG Transfer End", NULL);
+	if (ret)
+		goto out1;
+
+	ret = request_irq(DMABRGI2, dmabrg_irq, IRQF_DISABLED,
+			"DMABRG Transfer Half", NULL);
+	if (ret == 0)
+		return ret;
+
+	free_irq(DMABRGI1, 0);
+out1:	free_irq(DMABRGI0, 0);
+out0:	kfree(dmabrg_handlers);
+	return ret;
+}
+subsys_initcall(dmabrg_init);
diff --git a/include/asm-sh/dmabrg.h b/include/asm-sh/dmabrg.h
new file mode 100644
index 000000000000..c5edba216cf1
--- /dev/null
+++ b/include/asm-sh/dmabrg.h
@@ -0,0 +1,23 @@
+/*
+ * SH7760 DMABRG (USB/Audio) support
+ */
+
+#ifndef _DMABRG_H_
+#define _DMABRG_H_
+
+/* IRQ sources */
+#define DMABRGIRQ_USBDMA	0
+#define DMABRGIRQ_USBDMAERR	1
+#define DMABRGIRQ_A0TXF		2
+#define DMABRGIRQ_A0TXH		3
+#define DMABRGIRQ_A0RXF		4
+#define DMABRGIRQ_A0RXH		5
+#define DMABRGIRQ_A1TXF		6
+#define DMABRGIRQ_A1TXH		7
+#define DMABRGIRQ_A1RXF		8
+#define DMABRGIRQ_A1RXH		9
+
+extern int dmabrg_request_irq(unsigned int, void(*)(void *), void *);
+extern void dmabrg_free_irq(unsigned int);
+
+#endif

From a3cf4ea8729a5d448742fd5a0a003827c9f25cb6 Mon Sep 17 00:00:00 2001
From: Paul Mundt <lethal@linux-sh.org>
Date: Wed, 9 May 2007 18:55:14 +0900
Subject: [PATCH 18/18] sh: Fix stacktrace simplification fallout.

When the stacktrace simplification changes went in the function
definition on SH got skipped, fix it up so things build again.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
 arch/sh/kernel/stacktrace.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/sh/kernel/stacktrace.c b/arch/sh/kernel/stacktrace.c
index 4bdd2f83535d..d41e561be20e 100644
--- a/arch/sh/kernel/stacktrace.c
+++ b/arch/sh/kernel/stacktrace.c
@@ -17,7 +17,7 @@
 /*
  * Save stack-backtrace addresses into a stack_trace buffer.
  */
-void save_stack_trace(struct stack_trace *trace, struct task_struct *task)
+void save_stack_trace(struct stack_trace *trace)
 {
 	unsigned long *sp = (unsigned long *)current_stack_pointer;