* Patch by Gleb Natapov, 19 Sep 2003:

  Move most of the timer interrupt related PPC code to ppc_lib/interrupts.c

* Patch by Anders Larsen, 17 Sep 2003:
  Bring ARM memory layout in sync with the documentation:
  stack and malloc-heap are now located _below_ the U-Boot code

22 files changed, 225 insertions, 980 deletions

diff --git a/cpu/74xx_7xx/interrupts.c b/cpu/74xx_7xx/interrupts.c
index 2e2e456..f0ea485 100644
--- a/cpu/74xx_7xx/interrupts.c
+++ b/cpu/74xx_7xx/interrupts.c
@@ -32,62 +32,7 @@
 #include <commproc.h>
 #include <command.h>
 
-/****************************************************************************/
-
-unsigned decrementer_count;	     /* count value for 1e6/HZ microseconds */
-
-/****************************************************************************/
-
-static __inline__ unsigned long
-get_msr(void)
-{
-	unsigned long msr;
-
-	asm volatile("mfmsr %0" : "=r" (msr) :);
-	return msr;
-}
-
-static __inline__ void
-set_msr(unsigned long msr)
-{
-	asm volatile("mtmsr %0" : : "r" (msr));
-}
-
-static __inline__ unsigned long
-get_dec(void)
-{
-	unsigned long val;
-
-	asm volatile("mfdec %0" : "=r" (val) :);
-	return val;
-}
-
-
-static __inline__ void
-set_dec(unsigned long val)
-{
-	asm volatile("mtdec %0" : : "r" (val));
-}
-
-
-void
-enable_interrupts(void)
-{
-	set_msr (get_msr() | MSR_EE);
-}
-
-/* returns flag if MSR_EE was set before */
-int
-disable_interrupts(void)
-{
-	ulong msr = get_msr();
-	set_msr (msr & ~MSR_EE);
-	return ((msr & MSR_EE) != 0);
-}
-
-/****************************************************************************/
-
-int interrupt_init(void)
+int interrupt_init_cpu (unsigned *decrementer_count)
 {
 #if defined(DEBUG) && !defined(CONFIG_AMIGAONEG3SE)
 	printf("interrupt_init: GT main cause reg: %08x:%08x\n",
@@ -103,22 +48,8 @@ int interrupt_init(void)
 	       GTREGREAD(ETHERNET2_INTERRUPT_MASK_REGISTER));
 	puts("interrupt_init: setting decrementer_count\n");
 #endif
-	decrementer_count = get_tbclk() / CFG_HZ;
+	*decrementer_count = get_tbclk() / CFG_HZ;
 
-#ifdef DEBUG
-	puts("interrupt_init: setting actual decremter\n");
-#endif
-	set_dec (get_tbclk() / CFG_HZ);
-
-#ifdef DEBUG
-	printf("interrupt_init: enabling interrupts (msr = %08lx)\n",
-		get_msr());
-#endif
-	set_msr (get_msr() | MSR_EE);
-
-#ifdef DEBUG
-	printf("interrupt_init: done. (msr = %08lx)\n", get_msr());
-#endif
 	return (0);
 }
 
@@ -141,40 +72,10 @@ volatile ulong timestamp = 0;
  * Trivial implementation - no need to be really accurate.
  */
 void
-timer_interrupt(struct pt_regs *regs)
-{
-	set_dec(decrementer_count);
-	timestamp++;
-
-#if defined(CONFIG_WATCHDOG)
-	if ((timestamp % (CFG_HZ / 2)) == 0) {
-#if defined(CONFIG_PCIPPC2)
-		extern void pcippc2_wdt_reset (void);
-
-		pcippc2_wdt_reset();
-#endif
-	}
-#endif /* CONFIG_WATCHDOG */
-}
-
-/****************************************************************************/
-
-void
-reset_timer(void)
-{
-	timestamp = 0;
-}
-
-ulong
-get_timer(ulong base)
-{
-	return (timestamp - base);
-}
-
-void
-set_timer(ulong t)
+timer_interrupt_cpu (struct pt_regs *regs)
 {
-	timestamp = t;
+	/* nothing to do here */
+	return;
 }
 
 /****************************************************************************/
diff --git a/cpu/arm720t/cpu.c b/cpu/arm720t/cpu.c
index 7521fba..b6fcef9 100644
--- a/cpu/arm720t/cpu.c
+++ b/cpu/arm720t/cpu.c
@@ -82,18 +82,15 @@ static void cp_delay (void)
 int cpu_init (void)
 {
 	/*
-	 * setup up stack if necessary
+	 * setup up stacks if necessary
 	 */
 #ifdef CONFIG_USE_IRQ
-	IRQ_STACK_START   = _armboot_end + \
-				CONFIG_STACKSIZE + \
-				CONFIG_STACKSIZE_IRQ - 4;
-	FIQ_STACK_START = IRQ_STACK_START + CONFIG_STACKSIZE_FIQ;
-	_armboot_real_end = FIQ_STACK_START + 4;
-#else
-	_armboot_real_end = _armboot_end + CONFIG_STACKSIZE;
+	DECLARE_GLOBAL_DATA_PTR;
+
+	IRQ_STACK_START = _armboot_start - CFG_MALLOC_LEN - CFG_GBL_DATA_LEN - 4;
+	FIQ_STACK_START = IRQ_STACK_START - CONFIG_STACKSIZE_IRQ;
 #endif
-	return (0);
+	return 0;
 }
 
 int cleanup_before_linux (void)
diff --git a/cpu/arm720t/start.S b/cpu/arm720t/start.S
index fdedc91..8ddb0c9 100644
--- a/cpu/arm720t/start.S
+++ b/cpu/arm720t/start.S
@@ -90,14 +90,6 @@ _armboot_end_data:
 _armboot_end:
 	.word armboot_end
 
-/*
- * _armboot_real_end is the first usable RAM address behind armboot
- * and the various stacks
- */
-.globl _armboot_real_end
-_armboot_real_end:
-	.word 0x0badc0de
-
 #ifdef CONFIG_USE_IRQ
 /* IRQ stack memory (calculated at run-time) */
 .globl IRQ_STACK_START
@@ -132,32 +124,32 @@ reset:
 	bl	cpu_init_crit
 #endif
 
-relocate:
-	/*
-	 * relocate armboot to RAM
-	 */
-	adr	r0, _start		/* r0 <- current position of code */
+relocate:				/* relocate U-Boot to RAM	    */
+	adr	r0, _start		/* r0 <- current position of code   */
+	ldr	r1, _TEXT_BASE		/* test if we run from flash or RAM */
+	cmp     r0, r1                  /* don't reloc during debug         */
+	beq     stack_setup
+
 	ldr	r2, _armboot_start
 	ldr	r3, _armboot_end
-	sub	r2, r3, r2		/* r2 <- size of armboot */
-	ldr	r1, _TEXT_BASE		/* r1 <- destination address */
-	add	r2, r0, r2		/* r2 <- source end address */
+	sub	r2, r3, r2		/* r2 <- size of armboot            */
+	add	r2, r0, r2		/* r2 <- source end address         */
 
-	/*
-	 * r0 = source address
-	 * r1 = target address
-	 * r2 = source end address
-	 */
 copy_loop:
-	ldmia	r0!, {r3-r10}
-	stmia	r1!, {r3-r10}
-	cmp	r0, r2
+	ldmia	r0!, {r3-r10}		/* copy from source address [r0]    */
+	stmia	r1!, {r3-r10}		/* copy to   target address [r1]    */
+	cmp	r0, r2			/* until source end addreee [r2]    */
 	ble	copy_loop
 
-	/* set up the stack */
-	ldr	r0, _armboot_end
-	add	r0, r0, #CONFIG_STACKSIZE
-	sub	sp, r0, #12		/* leave 3 words for abort-stack */
+	/* Set up the stack						    */
+stack_setup:
+	ldr	r0, _TEXT_BASE		/* upper 128 KiB: relocated uboot   */
+	sub	r0, r0, #CFG_MALLOC_LEN	/* malloc area                      */
+	sub	r0, r0, #CFG_GBL_DATA_SIZE /* bdinfo                        */
+#ifdef CONFIG_USE_IRQ
+	sub	r0, r0, #(CONFIG_STACKSIZE_IRQ+CONFIG_STACKSIZE_FIQ)
+#endif
+	sub	sp, r0, #12		/* leave 3 words for abort-stack    */
 
 	ldr	pc, _start_armboot
 
diff --git a/cpu/arm920t/cpu.c b/cpu/arm920t/cpu.c
index 41cebdf..e638c1f 100644
--- a/cpu/arm920t/cpu.c
+++ b/cpu/arm920t/cpu.c
@@ -87,17 +87,15 @@ static void cp_delay (void)
 int cpu_init (void)
 {
 	/*
-	 * setup up stack if necessary
+	 * setup up stacks if necessary
 	 */
 #ifdef CONFIG_USE_IRQ
-	IRQ_STACK_START = _armboot_end +
-			CONFIG_STACKSIZE + CONFIG_STACKSIZE_IRQ - 4;
-	FIQ_STACK_START = IRQ_STACK_START + CONFIG_STACKSIZE_FIQ;
-	_armboot_real_end = FIQ_STACK_START + 4;
-#else
-	_armboot_real_end = _armboot_end + CONFIG_STACKSIZE;
-#endif	/* CONFIG_USE_IRQ */
-	return (0);
+	DECLARE_GLOBAL_DATA_PTR;
+
+	IRQ_STACK_START = _armboot_start - CFG_MALLOC_LEN - CFG_GBL_DATA_LEN - 4;
+	FIQ_STACK_START = IRQ_STACK_START - CONFIG_STACKSIZE_IRQ;
+#endif
+	return 0;
 }
 
 int cleanup_before_linux (void)
diff --git a/cpu/arm920t/start.S b/cpu/arm920t/start.S
index 17c5f86..d640942 100644
--- a/cpu/arm920t/start.S
+++ b/cpu/arm920t/start.S
@@ -91,14 +91,6 @@ _armboot_end_data:
 _armboot_end:
 	.word armboot_end
 
-/*
- * _armboot_real_end is the first usable RAM address behind armboot
- * and the various stacks
- */
-.globl _armboot_real_end
-_armboot_real_end:
-	.word 0x0badc0de
-
 #ifdef CONFIG_USE_IRQ
 /* IRQ stack memory (calculated at run-time) */
 .globl IRQ_STACK_START
@@ -171,28 +163,33 @@ reset:
 	bl	cpu_init_crit
 #endif
 
-relocate:
-	/*
-	 * relocate armboot to RAM
-	 */
-	adr	r0, _start		/* r0 <- current position of code */
+relocate:				/* relocate U-Boot to RAM	    */
+	adr	r0, _start		/* r0 <- current position of code   */
+	ldr	r1, _TEXT_BASE		/* test if we run from flash or RAM */
+	cmp     r0, r1                  /* don't reloc during debug         */
+	beq     stack_setup
+
 	ldr	r2, _armboot_start
 	ldr	r3, _armboot_end
-	sub	r2, r3, r2		/* r2 <- size of armboot */
-	ldr	r1, _TEXT_BASE		/* r1 <- destination address */
-	add	r2, r0, r2		/* r2 <- source end address */
+	sub	r2, r3, r2		/* r2 <- size of armboot            */
+	add	r2, r0, r2		/* r2 <- source end address         */
 
-	/*
-	 * r0 = source address
-	 * r1 = target address
-	 * r2 = source end address
-	 */
 copy_loop:
-	ldmia	r0!, {r3-r10}
-	stmia	r1!, {r3-r10}
-	cmp	r0, r2
+	ldmia	r0!, {r3-r10}		/* copy from source address [r0]    */
+	stmia	r1!, {r3-r10}		/* copy to   target address [r1]    */
+	cmp	r0, r2			/* until source end addreee [r2]    */
 	ble	copy_loop
 
+	/* Set up the stack						    */
+stack_setup:
+	ldr	r0, _TEXT_BASE		/* upper 128 KiB: relocated uboot   */
+	sub	r0, r0, #CFG_MALLOC_LEN	/* malloc area                      */
+	sub	r0, r0, #CFG_GBL_DATA_SIZE /* bdinfo                        */
+#ifdef CONFIG_USE_IRQ
+	sub	r0, r0, #(CONFIG_STACKSIZE_IRQ+CONFIG_STACKSIZE_FIQ)
+#endif
+	sub	sp, r0, #12		/* leave 3 words for abort-stack    */
+
 #if 0
 	/* try doing this stuff after the relocation */
 	ldr     r0, =pWTCON
@@ -214,11 +211,6 @@ copy_loop:
 	/* END stuff after relocation */
 #endif
 
-	/* set up the stack */
-	ldr	r0, _armboot_end
-	add	r0, r0, #CONFIG_STACKSIZE
-	sub	sp, r0, #12		/* leave 3 words for abort-stack */
-
 	ldr	pc, _start_armboot
 
 _start_armboot:	.word start_armboot
diff --git a/cpu/arm925t/cpu.c b/cpu/arm925t/cpu.c
index c55fbc7..6bac53d 100644
--- a/cpu/arm925t/cpu.c
+++ b/cpu/arm925t/cpu.c
@@ -88,17 +88,15 @@ static void cp_delay (void)
 int cpu_init (void)
 {
 	/*
-	 * setup up stack if necessary
+	 * setup up stacks if necessary
 	 */
 #ifdef CONFIG_USE_IRQ
-	IRQ_STACK_START = _armboot_end +
-			CONFIG_STACKSIZE + CONFIG_STACKSIZE_IRQ - 4;
-	FIQ_STACK_START = IRQ_STACK_START + CONFIG_STACKSIZE_FIQ;
-	_armboot_real_end = FIQ_STACK_START + 4;
-#else
-	_armboot_real_end = _armboot_end + CONFIG_STACKSIZE;
-#endif	/* CONFIG_USE_IRQ */
-	return (0);
+	DECLARE_GLOBAL_DATA_PTR;
+
+	IRQ_STACK_START = _armboot_start - CFG_MALLOC_LEN - CFG_GBL_DATA_LEN - 4;
+	FIQ_STACK_START = IRQ_STACK_START - CONFIG_STACKSIZE_IRQ;
+#endif
+	return 0;
 }
 
 int cleanup_before_linux (void)
diff --git a/cpu/arm925t/start.S b/cpu/arm925t/start.S
index 6dd3012..0a3042d 100644
--- a/cpu/arm925t/start.S
+++ b/cpu/arm925t/start.S
@@ -100,14 +100,6 @@ _armboot_end_data:
 _armboot_end:
 	.word armboot_end
 
-/*
- * _armboot_real_end is the first usable RAM address behind armboot
- * and the various stacks
- */
-.globl _armboot_real_end
-_armboot_real_end:
-	.word 0x0badc0de
-
 #ifdef CONFIG_USE_IRQ
 /* IRQ stack memory (calculated at run-time) */
 .globl IRQ_STACK_START
@@ -168,34 +160,41 @@ poll1:
 	ldrh r1, [r0]
 	ands r1, r1, #0x01
 	beq poll1
-	bl  cpu_init_crit
 
-relocate:
 	/*
-	 * relocate armboot to RAM
+	 * we do sys-critical inits only at reboot,
+	 * not when booting from ram!
 	 */
-	adr	r0, _start		/* r0 <- current position of code */
+#ifdef CONFIG_INIT_CRITICAL
+	bl  cpu_init_crit
+#endif
+
+relocate:				/* relocate U-Boot to RAM	    */
+	adr	r0, _start		/* r0 <- current position of code   */
+	ldr	r1, _TEXT_BASE		/* test if we run from flash or RAM */
+	cmp     r0, r1                  /* don't reloc during debug         */
+	beq     stack_setup
+
 	ldr	r2, _armboot_start
 	ldr	r3, _armboot_end
-	sub	r2, r3, r2		/* r2 <- size of armboot */
-	ldr	r1, _TEXT_BASE		/* r1 <- destination address */
-	add	r2, r0, r2		/* r2 <- source end address */
+	sub	r2, r3, r2		/* r2 <- size of armboot            */
+	add	r2, r0, r2		/* r2 <- source end address         */
 
-	/*
-	 * r0 = source address
-	 * r1 = target address
-	 * r2 = source end address
-	 */
 copy_loop:
-	ldmia	r0!, {r3-r10}
-	stmia	r1!, {r3-r10}
-	cmp	r0, r2
+	ldmia	r0!, {r3-r10}		/* copy from source address [r0]    */
+	stmia	r1!, {r3-r10}		/* copy to   target address [r1]    */
+	cmp	r0, r2			/* until source end addreee [r2]    */
 	ble	copy_loop
 
-	/* set up the stack */
-	ldr	r0, _armboot_end
-	add	r0, r0, #CONFIG_STACKSIZE
-	sub	sp, r0, #12		/* leave 3 words for abort-stack */
+	/* Set up the stack						    */
+stack_setup:
+	ldr	r0, _TEXT_BASE		/* upper 128 KiB: relocated uboot   */
+	sub	r0, r0, #CFG_MALLOC_LEN	/* malloc area                      */
+	sub	r0, r0, #CFG_GBL_DATA_SIZE /* bdinfo                        */
+#ifdef CONFIG_USE_IRQ
+	sub	r0, r0, #(CONFIG_STACKSIZE_IRQ+CONFIG_STACKSIZE_FIQ)
+#endif
+	sub	sp, r0, #12		/* leave 3 words for abort-stack    */
 
 	ldr	pc, _start_armboot
 
diff --git a/cpu/arm926ejs/cpu.c b/cpu/arm926ejs/cpu.c
index a91aa37..748a21a 100644
--- a/cpu/arm926ejs/cpu.c
+++ b/cpu/arm926ejs/cpu.c
@@ -88,17 +88,15 @@ static void cp_delay (void)
 int cpu_init (void)
 {
 	/*
-	 * setup up stack if necessary
+	 * setup up stacks if necessary
 	 */
 #ifdef CONFIG_USE_IRQ
-	IRQ_STACK_START = _armboot_end +
-			CONFIG_STACKSIZE + CONFIG_STACKSIZE_IRQ - 4;
-	FIQ_STACK_START = IRQ_STACK_START + CONFIG_STACKSIZE_FIQ;
-	_armboot_real_end = FIQ_STACK_START + 4;
-#else
-	_armboot_real_end = _armboot_end + CONFIG_STACKSIZE;
-#endif	/* CONFIG_USE_IRQ */
-	return (0);
+	DECLARE_GLOBAL_DATA_PTR;
+
+	IRQ_STACK_START = _armboot_start - CFG_MALLOC_LEN - CFG_GBL_DATA_LEN - 4;
+	FIQ_STACK_START = IRQ_STACK_START - CONFIG_STACKSIZE_IRQ;
+#endif
+	return 0;
 }
 
 int cleanup_before_linux (void)
diff --git a/cpu/arm926ejs/start.S b/cpu/arm926ejs/start.S
index b860fd4..39d7409 100644
--- a/cpu/arm926ejs/start.S
+++ b/cpu/arm926ejs/start.S
@@ -108,14 +108,6 @@ _armboot_end_data:
 _armboot_end:
 	.word armboot_end
 
-/*
- * _armboot_real_end is the first usable RAM address behind armboot
- * and the various stacks
- */
-.globl _armboot_real_end
-_armboot_real_end:
-	.word 0x0badc0de
-
 #ifdef CONFIG_USE_IRQ
 /* IRQ stack memory (calculated at run-time) */
 .globl IRQ_STACK_START
@@ -162,34 +154,41 @@ reset:
 	str	r1, [r0]
 	ldr	r0, =REG_IHL2_MIR
 	str	r1, [r0]
-	bl	cpu_init_crit
 
-relocate:
 	/*
-	 * relocate armboot to RAM
+	 * we do sys-critical inits only at reboot,
+	 * not when booting from ram!
 	 */
-	adr	r0, _start		/* r0 <- current position of code */
+#ifdef CONFIG_INIT_CRITICAL
+	bl	cpu_init_crit
+#endif
+
+relocate:				/* relocate U-Boot to RAM	    */
+	adr	r0, _start		/* r0 <- current position of code   */
+	ldr	r1, _TEXT_BASE		/* test if we run from flash or RAM */
+	cmp     r0, r1                  /* don't reloc during debug         */
+	beq     stack_setup
+
 	ldr	r2, _armboot_start
 	ldr	r3, _armboot_end
-	sub	r2, r3, r2		/* r2 <- size of armboot */
-	ldr	r1, _TEXT_BASE		/* r1 <- destination address */
-	add	r2, r0, r2		/* r2 <- source end address */
+	sub	r2, r3, r2		/* r2 <- size of armboot            */
+	add	r2, r0, r2		/* r2 <- source end address         */
 
-	/*
-	 * r0 = source address
-	 * r1 = target address
-	 * r2 = source end address
-	 */
 copy_loop:
-	ldmia	r0!, {r3-r10}
-	stmia	r1!, {r3-r10}
-	cmp	r0, r2
+	ldmia	r0!, {r3-r10}		/* copy from source address [r0]    */
+	stmia	r1!, {r3-r10}		/* copy to   target address [r1]    */
+	cmp	r0, r2			/* until source end addreee [r2]    */
 	ble	copy_loop
 
-	/* set up the stack */
-	ldr	r0, _armboot_end
-	add	r0, r0, #CONFIG_STACKSIZE
-	sub	sp, r0, #12		/* leave 3 words for abort-stack */
+	/* Set up the stack						    */
+stack_setup:
+	ldr	r0, _TEXT_BASE		/* upper 128 KiB: relocated uboot   */
+	sub	r0, r0, #CFG_MALLOC_LEN	/* malloc area                      */
+	sub	r0, r0, #CFG_GBL_DATA_SIZE /* bdinfo                        */
+#ifdef CONFIG_USE_IRQ
+	sub	r0, r0, #(CONFIG_STACKSIZE_IRQ+CONFIG_STACKSIZE_FIQ)
+#endif
+	sub	sp, r0, #12		/* leave 3 words for abort-stack    */
 
 	ldr	pc, _start_armboot
 
diff --git a/cpu/at91rm9200/cpu.c b/cpu/at91rm9200/cpu.c
index 262ca34..b0cfcef 100644
--- a/cpu/at91rm9200/cpu.c
+++ b/cpu/at91rm9200/cpu.c
@@ -81,18 +81,16 @@ static void cp_delay(void)
 
 int cpu_init(void)
 {
-    /*
-     * setup up stack if necessary
-     */
+	/*
+	 * setup up stacks if necessary
+	 */
 #ifdef CONFIG_USE_IRQ
-    IRQ_STACK_START = _armboot_end +
-			CONFIG_STACKSIZE + CONFIG_STACKSIZE_IRQ - 4;
-    FIQ_STACK_START = IRQ_STACK_START + CONFIG_STACKSIZE_FIQ;
-    _armboot_real_end = FIQ_STACK_START + 4;
-#else
-    _armboot_real_end = _armboot_end + CONFIG_STACKSIZE;
+	DECLARE_GLOBAL_DATA_PTR;
+
+	IRQ_STACK_START = _armboot_start - CFG_MALLOC_LEN - CFG_GBL_DATA_LEN - 4;
+	FIQ_STACK_START = IRQ_STACK_START - CONFIG_STACKSIZE_IRQ;
 #endif
-    return 0;
+	return 0;
 }
 
 int cleanup_before_linux(void)
diff --git a/cpu/at91rm9200/start.S b/cpu/at91rm9200/start.S
index 9fa1461..a93d045 100644
--- a/cpu/at91rm9200/start.S
+++ b/cpu/at91rm9200/start.S
@@ -93,14 +93,6 @@ _armboot_end_data:
 _armboot_end:
 	.word armboot_end
 
-/*
- * _armboot_real_end is the first usable RAM address behind armboot
- * and the various stacks
- */
-.globl _armboot_real_end
-_armboot_real_end:
-	.word 0x0badc0de
-
 #ifdef CONFIG_USE_IRQ
 /* IRQ stack memory (calculated at run-time) */
 .globl IRQ_STACK_START
@@ -147,10 +139,16 @@ copyex:
 	bl      cpu_init_crit
 #endif
 
-	/* set up the stack */
-	ldr     r0, _armboot_end
-	add     r0, r0, #CONFIG_STACKSIZE
-	sub     sp, r0, #12             /* leave 3 words for abort-stack */
+	/* Set up the stack						    */
+stack_setup:
+	ldr	r0, _TEXT_BASE		/* upper 128 KiB: relocated uboot   */
+	sub	r0, r0, #CFG_MALLOC_LEN	/* malloc area                      */
+	sub	r0, r0, #CFG_GBL_DATA_SIZE /* bdinfo                        */
+#ifdef CONFIG_USE_IRQ
+	sub	r0, r0, #(CONFIG_STACKSIZE_IRQ+CONFIG_STACKSIZE_FIQ)
+#endif
+	sub	sp, r0, #12		/* leave 3 words for abort-stack    */
+
 	ldr pc,_start_armboot
 
 _start_armboot: .word start_armboot
diff --git a/cpu/mpc5xx/interrupts.c b/cpu/mpc5xx/interrupts.c
index 4618680..3678b5b 100644
--- a/cpu/mpc5xx/interrupts.c
+++ b/cpu/mpc5xx/interrupts.c
@@ -28,16 +28,9 @@
  */
 
 #include <common.h>
-#include <watchdog.h>
 #include <mpc5xx.h>
 #include <asm/processor.h>
 
-/************************************************************************/
-
-unsigned decrementer_count;	/* count value for 1e6/HZ microseconds	*/
-
-/************************************************************************/
-
 struct interrupt_action {
 	interrupt_handler_t *handler;
 	void *arg;
@@ -46,73 +39,19 @@ struct interrupt_action {
 static struct interrupt_action irq_vecs[NR_IRQS];
 
 /*
- * Local function prototypes
- */
-static __inline__ unsigned long get_msr (void)
-{
-	unsigned long msr;
-
-	asm volatile ("mfmsr %0":"=r" (msr):);
-
-	return msr;
-}
-
-static __inline__ void set_msr (unsigned long msr)
-{
-	asm volatile ("mtmsr %0"::"r" (msr));
-}
-
-static __inline__ unsigned long get_dec (void)
-{
-	unsigned long val;
-
-	asm volatile ("mfdec %0":"=r" (val):);
-
-	return val;
-}
-
-
-static __inline__ void set_dec (unsigned long val)
-{
-	asm volatile ("mtdec %0"::"r" (val));
-}
-
-/*
- * Enable interrupts
- */
-void enable_interrupts (void)
-{
-	set_msr (get_msr () | MSR_EE);
-}
-
-/*
- * Returns flag if MSR_EE was set before
- */
-int disable_interrupts (void)
-{
-	ulong msr = get_msr ();
-
-	set_msr (msr & ~MSR_EE);
-	return ((msr & MSR_EE) != 0);
-}
-
-/*
  * Initialise interrupts
  */
 
-int interrupt_init (void)
+int interrupt_init_cpu (ulong *decrementer_count)
 {
 	volatile immap_t *immr = (immap_t *) CFG_IMMR;
 
 	/* Decrementer used here for status led */
-	decrementer_count = get_tbclk () / CFG_HZ;
+	*decrementer_count = get_tbclk () / CFG_HZ;
 
 	/* Disable all interrupts */
 	immr->im_siu_conf.sc_simask = 0;
 
-	set_dec (decrementer_count);
-
-	set_msr (get_msr () | MSR_EE);
 	return (0);
 }
 
@@ -206,19 +145,14 @@ void irq_free_handler (int vec)
 	irq_vecs[vec].arg = NULL;
 }
 
-volatile ulong timestamp = 0;
-
 /*
  *  Timer interrupt - gets called when  bit 0 of DEC changes from
  *  0. Decrementer is enabled with bit TBE in TBSCR.
  */
-void timer_interrupt (struct pt_regs *regs)
+void timer_interrupt_cpu (struct pt_regs *regs)
 {
 	volatile immap_t *immr = (immap_t *) CFG_IMMR;
 
-#ifdef CONFIG_STATUS_LED
-	extern void status_led_tick (ulong);
-#endif
 #if 0
 	printf ("*** Timer Interrupt *** ");
 #endif
@@ -227,47 +161,5 @@ void timer_interrupt (struct pt_regs *regs)
 	__asm__ ("nop");
 	immr->im_clkrst.car_plprcr |= PLPRCR_TEXPS | PLPRCR_TMIST;
 
-	/* Restore Decrementer Count */
-	set_dec (decrementer_count);
-
-	timestamp++;
-
-#ifdef CONFIG_STATUS_LED
-	status_led_tick (timestamp);
-#endif /* CONFIG_STATUS_LED */
-
-#if defined(CONFIG_WATCHDOG)
-	/*
-	 * The shortest watchdog period of all boards
-	 * is approx. 1 sec, thus re-trigger watchdog at least
-	 * every 500 ms = CFG_HZ / 2
-	 */
-	if ((timestamp % (CFG_HZ / 2)) == 0) {
-		reset_5xx_watchdog (immr);
-	}
-#endif /* CONFIG_WATCHDOG */
-}
-
-/*
- * Reset timer
- */
-void reset_timer (void)
-{
-	timestamp = 0;
-}
-
-/*
- * Get Timer
- */
-ulong get_timer (ulong base)
-{
-	return (timestamp - base);
-}
-
-/*
- * Set timer
- */
-void set_timer (ulong t)
-{
-	timestamp = t;
+	return;
 }
diff --git a/cpu/mpc5xxx/interrupts.c b/cpu/mpc5xxx/interrupts.c
index 5aa4388..7bacecd 100644
--- a/cpu/mpc5xxx/interrupts.c
+++ b/cpu/mpc5xxx/interrupts.c
@@ -32,79 +32,10 @@
 #include <asm/processor.h>
 #include <command.h>
 
-/****************************************************************************/
-
-unsigned decrementer_count;	     /* count value for 1e6/HZ microseconds */
-
-/****************************************************************************/
-
-static __inline__ unsigned long
-get_msr(void)
-{
-	unsigned long msr;
-
-	asm volatile("mfmsr %0" : "=r" (msr) :);
-	return msr;
-}
-
-static __inline__ void
-set_msr(unsigned long msr)
-{
-	asm volatile("mtmsr %0" : : "r" (msr));
-}
-
-static __inline__ unsigned long
-get_dec(void)
-{
-	unsigned long val;
-
-	asm volatile("mfdec %0" : "=r" (val) :);
-	return val;
-}
-
-
-static __inline__ void
-set_dec(unsigned long val)
-{
-	asm volatile("mtdec %0" : : "r" (val));
-}
-
-
-void
-enable_interrupts(void)
-{
-	set_msr (get_msr() | MSR_EE);
-}
-
-/* returns flag if MSR_EE was set before */
-int
-disable_interrupts(void)
-{
-	ulong msr = get_msr();
-	set_msr (msr & ~MSR_EE);
-	return ((msr & MSR_EE) != 0);
-}
-
-/****************************************************************************/
-
-int interrupt_init(void)
+int interrupt_init_cpu (ulong *decrementer_count)
 {
-	decrementer_count = get_tbclk() / CFG_HZ;
+	*decrementer_count = get_tbclk() / CFG_HZ;
 
-#ifdef DEBUG
-	puts("interrupt_init: setting actual decremter\n");
-#endif
-	set_dec (get_tbclk() / CFG_HZ);
-
-#ifdef DEBUG
-	printf("interrupt_init: enabling interrupts (msr = %08lx)\n",
-		get_msr());
-#endif
-	set_msr (get_msr() | MSR_EE);
-
-#ifdef DEBUG
-	printf("interrupt_init: done. (msr = %08lx)\n", get_msr());
-#endif
 	return (0);
 }
 
@@ -119,38 +50,11 @@ external_interrupt(struct pt_regs *regs)
 	puts("external_interrupt (oops!)\n");
 }
 
-volatile ulong timestamp = 0;
-
-/*
- * timer_interrupt - gets called when the decrementer overflows,
- * with interrupts disabled.
- * Trivial implementation - no need to be really accurate.
- */
-void
-timer_interrupt(struct pt_regs *regs)
-{
-	set_dec(decrementer_count);
-	timestamp++;
-}
-
-/****************************************************************************/
-
-void
-reset_timer(void)
-{
-	timestamp = 0;
-}
-
-ulong
-get_timer(ulong base)
-{
-	return (timestamp - base);
-}
-
 void
-set_timer(ulong t)
+timer_interrupt_cpu (struct pt_regs *regs)
 {
-	timestamp = t;
+	/* nothing to do here */
+	return;
 }
 
 /****************************************************************************/
diff --git a/cpu/mpc824x/interrupts.c b/cpu/mpc824x/interrupts.c
index 825857b..acb8947 100644
--- a/cpu/mpc824x/interrupts.c
+++ b/cpu/mpc824x/interrupts.c
@@ -27,62 +27,11 @@
 #include <asm/processor.h>
 #include <asm/pci_io.h>
 #include <commproc.h>
-#include <watchdog.h>
 #include "drivers/epic.h"
 
-/****************************************************************************/
-
-unsigned decrementer_count;		/* count val for 1e6/HZ microseconds */
-
-static __inline__ unsigned long get_msr (void)
-{
-	unsigned long msr;
-
-	asm volatile ("mfmsr %0":"=r" (msr):);
-
-	return msr;
-}
-
-static __inline__ void set_msr (unsigned long msr)
-{
-	asm volatile ("mtmsr %0"::"r" (msr));
-}
-
-static __inline__ unsigned long get_dec (void)
-{
-	unsigned long val;
-
-	asm volatile ("mfdec %0":"=r" (val):);
-
-	return val;
-}
-
-
-static __inline__ void set_dec (unsigned long val)
-{
-	asm volatile ("mtdec %0"::"r" (val));
-}
-
-
-void enable_interrupts (void)
+int interrupt_init_cpu (unsigned *decrementer_count)
 {
-	set_msr (get_msr () | MSR_EE);
-}
-
-/* returns flag if MSR_EE was set before */
-int disable_interrupts (void)
-{
-	ulong msr = get_msr ();
-
-	set_msr (msr & ~MSR_EE);
-	return ((msr & MSR_EE) != 0);
-}
-
-/****************************************************************************/
-
-int interrupt_init (void)
-{
-	decrementer_count = (get_bus_freq (0) / 4) / CFG_HZ;
+	*decrementer_count = (get_bus_freq (0) / 4) / CFG_HZ;
 
 	/*
 	 * It's all broken at the moment and I currently don't need
@@ -96,10 +45,6 @@ int interrupt_init (void)
 	/* EPIC won't generate INT unless Current Task Pri < 15 */
 	epicCurTaskPrioSet(0);
 
-	set_dec (decrementer_count);
-
-	set_msr (get_msr () | MSR_EE);
-
 	return (0);
 }
 
@@ -141,42 +86,8 @@ void irq_free_handler (int vec)
  vga?
  */
 
-volatile ulong timestamp = 0;
-
-void timer_interrupt (struct pt_regs *regs)
-{
-	/* Restore Decrementer Count */
-	set_dec (decrementer_count);
-
-	timestamp++;
-
-#if defined(CONFIG_WATCHDOG) || defined (CONFIG_HW_WATCHDOG)
-	if ((timestamp % (CFG_HZ / 2)) == 0) {
-		WATCHDOG_RESET ();
-	}
-#endif							/* CONFIG_WATCHDOG */
-#if defined(CONFIG_SHOW_ACTIVITY) && defined(CONFIG_OXC)
-	if ((timestamp % (CFG_HZ / 10)) == 0) {
-		{
-			extern void oxc_toggle_activeled (void);
-
-			oxc_toggle_activeled ();
-		}
-	}
-#endif
-}
-
-void reset_timer (void)
-{
-	timestamp = 0;
-}
-
-ulong get_timer (ulong base)
-{
-	return (timestamp - base);
-}
-
-void set_timer (ulong t)
+void timer_interrupt_cpu (struct pt_regs *regs, ulong timestamp)
 {
-	timestamp = t;
+	/* nothing to do here */
+	return;
 }
diff --git a/cpu/mpc8260/interrupts.c b/cpu/mpc8260/interrupts.c
index 3c5ef74..e2a6c97 100644
--- a/cpu/mpc8260/interrupts.c
+++ b/cpu/mpc8260/interrupts.c
@@ -24,19 +24,13 @@
  */
 
 #include <common.h>
-#include <watchdog.h>
 #include <command.h>
 #include <mpc8260.h>
 #include <mpc8260_irq.h>
 #include <asm/processor.h>
-#ifdef CONFIG_STATUS_LED
-#include <status_led.h>
-#endif
 
 /****************************************************************************/
 
-unsigned decrementer_count;		/* count val for 1e6/HZ microseconds */
-
 struct irq_action {
 	interrupt_handler_t *handler;
 	void *arg;
@@ -144,57 +138,13 @@ static int m8260_get_irq (struct pt_regs *regs)
 /* end of code ripped out of arch/ppc/kernel/ppc8260_pic.c		    */
 /****************************************************************************/
 
-static __inline__ unsigned long get_msr (void)
-{
-	unsigned long msr;
-
-	__asm__ __volatile__ ("mfmsr %0":"=r" (msr):);
-
-	return msr;
-}
-
-static __inline__ void set_msr (unsigned long msr)
-{
-	__asm__ __volatile__ ("mtmsr %0;sync;isync"::"r" (msr));
-}
-
-static __inline__ unsigned long get_dec (void)
-{
-	unsigned long val;
-
-	__asm__ __volatile__ ("mfdec %0":"=r" (val):);
-
-	return val;
-}
-
-static __inline__ void set_dec (unsigned long val)
-{
-	__asm__ __volatile__ ("mtdec %0"::"r" (val));
-}
-
-void enable_interrupts (void)
-{
-	set_msr (get_msr () | MSR_EE);
-}
-
-/* returns flag if MSR_EE was set before */
-int disable_interrupts (void)
-{
-	ulong msr = get_msr ();
-
-	set_msr (msr & ~MSR_EE);
-	return ((msr & MSR_EE) != 0);
-}
-
-/****************************************************************************/
-
-int interrupt_init (void)
+int interrupt_init_cpu (unsigned *decrementer_count)
 {
 	DECLARE_GLOBAL_DATA_PTR;
 
 	volatile immap_t *immr = (immap_t *) CFG_IMMR;
 
-	decrementer_count = (gd->bus_clk / 4) / CFG_HZ;
+	*decrementer_count = (gd->bus_clk / 4) / CFG_HZ;
 
 	/* Initialize the default interrupt mapping priorities */
 	immr->im_intctl.ic_sicr = 0;
@@ -216,10 +166,6 @@ int interrupt_init (void)
 	immr->im_intctl.ic_siexr = -1;
 #endif
 
-	set_dec (decrementer_count);
-
-	set_msr (get_msr () | MSR_EE);
-
 	return (0);
 }
 
@@ -236,7 +182,7 @@ void external_interrupt (struct pt_regs *regs)
 
 	m8260_mask_and_ack (irq);
 
-	set_msr (get_msr () | MSR_EE);
+	enable_interrupts ();
 
 	if (irq_handlers[irq].handler != NULL)
 		(*irq_handlers[irq].handler) (irq_handlers[irq].arg);
@@ -292,75 +238,10 @@ void irq_free_handler (int irq)
 
 /****************************************************************************/
 
-volatile ulong timestamp = 0;
-
-/*
- * timer_interrupt - gets called when the decrementer overflows,
- * with interrupts disabled.
- * Trivial implementation - no need to be really accurate.
- */
-void timer_interrupt (struct pt_regs *regs)
-{
-#if defined(CONFIG_WATCHDOG) || defined(CFG_HYMOD_DBLEDS)
-	volatile immap_t *immr = (immap_t *) CFG_IMMR;
-#endif	/* CONFIG_WATCHDOG */
-
-	/* Restore Decrementer Count */
-	set_dec (decrementer_count);
-
-	timestamp++;
-
-#if defined(CONFIG_WATCHDOG) || \
-    defined(CFG_CMA_LCD_HEARTBEAT) || \
-    defined(CFG_HYMOD_DBLEDS)
-
-	if ((timestamp % CFG_HZ) == 0) {
-#if defined(CFG_CMA_LCD_HEARTBEAT)
-		extern void lcd_heartbeat (void);
-#endif	/* CFG_CMA_LCD_HEARTBEAT */
-#if defined(CFG_HYMOD_DBLEDS)
-		volatile iop8260_t *iop = &immr->im_ioport;
-		static int shift = 0;
-#endif	/* CFG_HYMOD_DBLEDS */
-
-#if defined(CFG_CMA_LCD_HEARTBEAT)
-		lcd_heartbeat ();
-#endif	/* CFG_CMA_LCD_HEARTBEAT */
-
-#if defined(CONFIG_WATCHDOG)
-		reset_8260_watchdog (immr);
-#endif	/* CONFIG_WATCHDOG */
-
-#if defined(CFG_HYMOD_DBLEDS)
-		/* hymod daughter board LEDs */
-		if (++shift > 3)
-			shift = 0;
-		iop->iop_pdatd =
-				(iop->iop_pdatd & ~0x0f000000) | (1 << (24 + shift));
-#endif	/* CFG_HYMOD_DBLEDS */
-	}
-#endif	/* CONFIG_WATCHDOG || CFG_CMA_LCD_HEARTBEAT */
-
-#ifdef CONFIG_STATUS_LED
-	status_led_tick (timestamp);
-#endif	/* CONFIG_STATUS_LED */
-}
-
-/****************************************************************************/
-
-void reset_timer (void)
-{
-	timestamp = 0;
-}
-
-ulong get_timer (ulong base)
-{
-	return (timestamp - base);
-}
-
-void set_timer (ulong t)
+void timer_interrupt_cpu (struct pt_regs *regs)
 {
-	timestamp = t;
+	/* nothing to do here */
+	return;
 }
 
 /****************************************************************************/
diff --git a/cpu/mpc8xx/interrupts.c b/cpu/mpc8xx/interrupts.c
index 8bc0a1af..558dc09 100644
--- a/cpu/mpc8xx/interrupts.c
+++ b/cpu/mpc8xx/interrupts.c
@@ -22,7 +22,6 @@
  */
 
 #include <common.h>
-#include <watchdog.h>
 #include <mpc8xx.h>
 #include <mpc8xx_irq.h>
 #include <asm/processor.h>
@@ -30,10 +29,6 @@
 
 /************************************************************************/
 
-unsigned decrementer_count;	/* count value for 1e6/HZ microseconds	*/
-
-/************************************************************************/
-
 /*
  * CPM interrupt vector functions.
  */
@@ -50,57 +45,11 @@ static void cpm_interrupt (void *regs);
 
 /************************************************************************/
 
-static __inline__ unsigned long get_msr (void)
-{
-	unsigned long msr;
-
-	asm volatile ("mfmsr %0":"=r" (msr):);
-
-	return msr;
-}
-
-static __inline__ void set_msr (unsigned long msr)
-{
-	asm volatile ("mtmsr %0"::"r" (msr));
-}
-
-static __inline__ unsigned long get_dec (void)
-{
-	unsigned long val;
-
-	asm volatile ("mfdec %0":"=r" (val):);
-
-	return val;
-}
-
-
-static __inline__ void set_dec (unsigned long val)
-{
-	asm volatile ("mtdec %0"::"r" (val));
-}
-
-
-void enable_interrupts (void)
-{
-	set_msr (get_msr () | MSR_EE);
-}
-
-/* returns flag if MSR_EE was set before */
-int disable_interrupts (void)
-{
-	ulong msr = get_msr ();
-
-	set_msr (msr & ~MSR_EE);
-	return ((msr & MSR_EE) != 0);
-}
-
-/************************************************************************/
-
-int interrupt_init (void)
+int interrupt_init_cpu (unsigned *decrementer_count)
 {
 	volatile immap_t *immr = (immap_t *) CFG_IMMR;
 
-	decrementer_count = get_tbclk () / CFG_HZ;
+	*decrementer_count = get_tbclk () / CFG_HZ;
 
 	/* disable all interrupts */
 	immr->im_siu_conf.sc_simask = 0;
@@ -108,10 +57,6 @@ int interrupt_init (void)
 	/* Configure CPM interrupts */
 	cpm_interrupt_init ();
 
-	set_dec (decrementer_count);
-
-	set_msr (get_msr () | MSR_EE);
-
 	return (0);
 }
 
@@ -314,20 +259,15 @@ static void cpm_interrupt_init (void)
 
 /************************************************************************/
 
-volatile ulong timestamp = 0;
-
 /*
  * timer_interrupt - gets called when the decrementer overflows,
  * with interrupts disabled.
  * Trivial implementation - no need to be really accurate.
  */
-void timer_interrupt (struct pt_regs *regs)
+void timer_interrupt_cpu (struct pt_regs *regs)
 {
 	volatile immap_t *immr = (immap_t *) CFG_IMMR;
 
-#ifdef CONFIG_STATUS_LED
-	extern void status_led_tick (ulong);
-#endif
 #if 0
 	printf ("*** Timer Interrupt *** ");
 #endif
@@ -339,57 +279,6 @@ void timer_interrupt (struct pt_regs *regs)
 #else
 	immr->im_clkrst.car_plprcr |= PLPRCR_TEXPS | PLPRCR_TMIST;
 #endif
-	/* Restore Decrementer Count */
-	set_dec (decrementer_count);
-
-	timestamp++;
-
-#ifdef CONFIG_STATUS_LED
-	status_led_tick (timestamp);
-#endif /* CONFIG_STATUS_LED */
-
-#if defined(CONFIG_WATCHDOG) || defined(CFG_CMA_LCD_HEARTBEAT)
-
-	/*
-	 * The shortest watchdog period of all boards (except LWMON)
-	 * is approx. 1 sec, thus re-trigger watchdog at least
-	 * every 500 ms = CFG_HZ / 2
-	 */
-#ifndef CONFIG_LWMON
-	if ((timestamp % (CFG_HZ / 2)) == 0) {
-#else
-	if ((timestamp % (CFG_HZ / 20)) == 0) {
-#endif
-
-#if defined(CFG_CMA_LCD_HEARTBEAT)
-		extern void lcd_heartbeat (void);
-
-		lcd_heartbeat ();
-#endif /* CFG_CMA_LCD_HEARTBEAT */
-
-#if defined(CONFIG_WATCHDOG)
-		reset_8xx_watchdog (immr);
-#endif /* CONFIG_WATCHDOG */
-
-	}
-#endif /* CONFIG_WATCHDOG || CFG_CMA_LCD_HEARTBEAT */
-}
-
-/************************************************************************/
-
-void reset_timer (void)
-{
-	timestamp = 0;
-}
-
-ulong get_timer (ulong base)
-{
-	return (timestamp - base);
-}
-
-void set_timer (ulong t)
-{
-	timestamp = t;
 }
 
 /************************************************************************/
diff --git a/cpu/ppc4xx/405gp_enet.c b/cpu/ppc4xx/405gp_enet.c
index c222c71..a9c7cfe 100644
--- a/cpu/ppc4xx/405gp_enet.c
+++ b/cpu/ppc4xx/405gp_enet.c
@@ -159,7 +159,7 @@ static int tx_i_index = 0;		/* Transmit Interrupt Queue Index */
 static int tx_u_index = 0;		/* Transmit User Queue Index */
 static int tx_run[NUM_TX_BUFF];	/* Transmit Running Queue */
 
-#undef INFO_405_ENET 1
+#undef INFO_405_ENET
 #ifdef INFO_405_ENET
 static int packetSent = 0;
 static int packetReceived = 0;
diff --git a/cpu/ppc4xx/interrupts.c b/cpu/ppc4xx/interrupts.c
index b6a956c..1a9ae9d 100644
--- a/cpu/ppc4xx/interrupts.c
+++ b/cpu/ppc4xx/interrupts.c
@@ -35,10 +35,6 @@
 
 /****************************************************************************/
 
-unsigned decrementer_count;		/* count value for 1e6/HZ microseconds */
-
-/****************************************************************************/
-
 /*
  * CPM interrupt vector functions.
  */
@@ -57,20 +53,6 @@ void uic1_interrupt( void * parms); /* UIC1 handler */
 #endif
 
 /****************************************************************************/
-
-static __inline__ unsigned long get_msr(void)
-{
-	unsigned long msr;
-
-	asm volatile("mfmsr %0" : "=r" (msr) :);
-	return msr;
-}
-
-static __inline__ void set_msr(unsigned long msr)
-{
-	asm volatile("mtmsr %0" : : "r" (msr));
-}
-
 #if defined(CONFIG_440)
 
 /* SPRN changed in 440 */
@@ -81,21 +63,6 @@ static __inline__ void set_evpr(unsigned long val)
 
 #else /* !defined(CONFIG_440) */
 
-static __inline__ unsigned long get_dec(void)
-{
-	unsigned long val;
-
-	asm volatile("mfdec %0" : "=r" (val) :);
-	return val;
-}
-
-
-static __inline__ void set_dec(unsigned long val)
-{
-	asm volatile("mtdec %0" : : "r" (val));
-}
-
-
 static __inline__ void set_pit(unsigned long val)
 {
 	asm volatile("mtpit %0" : : "r" (val));
@@ -114,29 +81,18 @@ static __inline__ void set_evpr(unsigned long val)
 }
 #endif /* defined(CONFIG_440 */
 
-
-void enable_interrupts (void)
-{
-	set_msr (get_msr() | MSR_EE);
-}
-
-/* returns flag if MSR_EE was set before */
-int disable_interrupts (void)
-{
-	ulong msr = get_msr();
-	set_msr (msr & ~MSR_EE);
-	return ((msr & MSR_EE) != 0);
-}
-
 /****************************************************************************/
 
-int interrupt_init(void)
+int interrupt_init_cpu (unsigned *decrementer_count)
 {
 	DECLARE_GLOBAL_DATA_PTR;
 
 	int vec;
 	unsigned long val;
 
+	/* decrementer is automatically reloaded */
+	*decrementer_count = 0;
+	
 	/*
 	 * Mark all irqs as free
 	 */
@@ -194,10 +150,6 @@ int interrupt_init(void)
 	irq_install_handler(VECNUM_UIC1NC, uic1_interrupt, 0);
 	irq_install_handler(VECNUM_UIC1C, uic1_interrupt, 0);
 #endif
-	/*
-	 * Enable external interrupts (including PIT)
-	 */
-	set_msr (get_msr() | MSR_EE);
 
 	return (0);
 }
@@ -362,47 +314,14 @@ irq_free_handler(int vec)
 
 /****************************************************************************/
 
-
-volatile ulong timestamp = 0;
-
-/*
- * timer_interrupt - gets called when the decrementer overflows,
- * with interrupts disabled.
- * Trivial implementation - no need to be really accurate.
- */
-void timer_interrupt(struct pt_regs *regs)
-{
-#if 0
-	printf ("*** Timer Interrupt *** ");
-#endif
-	timestamp++;
-
-#if defined(CONFIG_WATCHDOG)
-	if ((timestamp % 1000) == 0)
-		reset_4xx_watchdog();
-#endif /* CONFIG_WATCHDOG */
-}
-
-/****************************************************************************/
-
-void reset_timer (void)
-{
-	timestamp = 0;
-}
-
-ulong get_timer (ulong base)
-{
-	return (timestamp - base);
-}
-
-void set_timer (ulong t)
+void timer_interrupt_cpu (struct pt_regs *regs)
 {
-	timestamp = t;
+	/* nothing to do here */
+	return;
 }
 
 /****************************************************************************/
 
-
 #if (CONFIG_COMMANDS & CFG_CMD_IRQ)
 
 /*******************************************************************************
diff --git a/cpu/pxa/cpu.c b/cpu/pxa/cpu.c
index 6b82f04..32ec4f6 100644
--- a/cpu/pxa/cpu.c
+++ b/cpu/pxa/cpu.c
@@ -37,22 +37,15 @@
 int cpu_init (void)
 {
 	/*
-	 * setup up stack if necessary
+	 * setup up stacks if necessary
 	 */
-/*
-
-  FIXME: the stack is _below_ the uboot code!!
-
 #ifdef CONFIG_USE_IRQ
-	IRQ_STACK_START = _armboot_end +
-			CONFIG_STACKSIZE + CONFIG_STACKSIZE_IRQ - 4;
-	FIQ_STACK_START = IRQ_STACK_START + CONFIG_STACKSIZE_FIQ;
-	_armboot_real_end = FIQ_STACK_START + 4;
-#else
-	_armboot_real_end = _armboot_end + CONFIG_STACKSIZE;
+	DECLARE_GLOBAL_DATA_PTR;
+
+	IRQ_STACK_START = _armboot_start - CFG_MALLOC_LEN - CFG_GBL_DATA_LEN - 4;
+	FIQ_STACK_START = IRQ_STACK_START - CONFIG_STACKSIZE_IRQ;
 #endif
-*/
-	return (0);
+	return 0;
 }
 
 int cleanup_before_linux (void)
diff --git a/cpu/pxa/start.S b/cpu/pxa/start.S
index a425449..d41b414 100644
--- a/cpu/pxa/start.S
+++ b/cpu/pxa/start.S
@@ -4,10 +4,10 @@
  *  Copyright (C) 1998	Dan Malek <dmalek@jlc.net>
  *  Copyright (C) 1999	Magnus Damm <kieraypc01.p.y.kie.era.ericsson.se>
  *  Copyright (C) 2000	Wolfgang Denk <wd@denx.de>
- *  Copyright (C) 2001	Alex Züpke <azu@sysgo.de>
+ *  Copyright (C) 2001	Alex Zuepke <azu@sysgo.de>
  *  Copyright (C) 2002	Kyle Harris <kharris@nexus-tech.net>
  *  Copyright (C) 2003  Robert Schwebel <r.schwebel@pengutronix.de>
- *  Copyright (C) 2003  Kai-Uwe Bloehm <kai-uwe.bloem@auerswald.de>
+ *  Copyright (C) 2003  Kai-Uwe Bloem <kai-uwe.bloem@auerswald.de>
  *
  * See file CREDITS for list of people who contributed to this
  * project.
@@ -55,7 +55,7 @@ _fiq:			.word fiq
 /*
  * Startup Code (reset vector)
  *
- * do important init only if we don't start from memory!
+ * do important init only if we don't start from RAM!
  * - relocate armboot to ram
  * - setup stack
  * - jump to second stage
@@ -91,21 +91,6 @@ _bss_start:
 _bss_end:
 	.word bss_end
 
-/*
- * _armboot_real_end is the first usable RAM address behind armboot
- * and the various stacks
- */
-.globl _armboot_real_end
-_armboot_real_end:
-	.word 0x0badc0de
-
-/*
- * We relocate uboot to this address (end of RAM - 128 KiB)
- */
-.globl _uboot_reloc
-_uboot_reloc:
-	.word TEXT_BASE
-
 #ifdef CONFIG_USE_IRQ
 /* IRQ stack memory (calculated at run-time) */
 .globl IRQ_STACK_START
@@ -131,7 +116,13 @@ reset:
 	orr	r0,r0,#0x13
 	msr	cpsr,r0
 
+	/*
+	 * we do sys-critical inits only at reboot,
+	 * not when booting from ram!
+	 */
+#ifdef CONFIG_INIT_CRITICAL
 	bl	cpu_init_crit		/* we do sys-critical inits	    */
+#endif
 
 relocate:				/* relocate U-Boot to RAM	    */
 	adr	r0, _start		/* r0 <- current position of code   */
@@ -151,12 +142,13 @@ copy_loop:
 	ble	copy_loop
 
 	/* Set up the stack						    */
-
 stack_setup:
-
-	ldr	r0, _uboot_reloc	/* upper 128 KiB: relocated uboot   */
-	sub	r0, r0, #CFG_MALLOC_LEN /* malloc area			    */
-					/* FIXME: bdinfo should be here	    */
+	ldr	r0, _TEXT_BASE		/* upper 128 KiB: relocated uboot   */
+	sub	r0, r0, #CFG_MALLOC_LEN	/* malloc area                      */
+	sub	r0, r0, #CFG_GBL_DATA_SIZE /* bdinfo                        */
+#ifdef CONFIG_USE_IRQ
+	sub	r0, r0, #(CONFIG_STACKSIZE_IRQ+CONFIG_STACKSIZE_FIQ)
+#endif
 	sub	sp, r0, #12		/* leave 3 words for abort-stack    */
 
 clear_bss:
@@ -202,9 +194,13 @@ OSTIMER_BASE:	.word	0x40a00000
 #define OIER	0x1C
 
 /* Clock Manager Registers					            */
+#ifdef CFG_CPUSPEED
 CC_BASE:	.word	0x41300000
 #define CCCR	0x00
 cpuspeed:	.word	CFG_CPUSPEED
+#else
+#error "You have to define CFG_CPUSPEED!!"
+#endif
 
 
 	/* RS: ???							    */
diff --git a/cpu/sa1100/cpu.c b/cpu/sa1100/cpu.c
index 370ea6c..b613fe7 100644
--- a/cpu/sa1100/cpu.c
+++ b/cpu/sa1100/cpu.c
@@ -36,17 +36,15 @@
 int cpu_init (void)
 {
 	/*
-	 * setup up stack if necessary
+	 * setup up stacks if necessary
 	 */
 #ifdef CONFIG_USE_IRQ
-	IRQ_STACK_START = _armboot_end +
-			CONFIG_STACKSIZE + CONFIG_STACKSIZE_IRQ - 4;
-	FIQ_STACK_START = IRQ_STACK_START + CONFIG_STACKSIZE_FIQ;
-	_armboot_real_end = FIQ_STACK_START + 4;
-#else
-	_armboot_real_end = _armboot_end + CONFIG_STACKSIZE;
+	DECLARE_GLOBAL_DATA_PTR;
+
+	IRQ_STACK_START = _armboot_start - CFG_MALLOC_LEN - CFG_GBL_DATA_LEN - 4;
+	FIQ_STACK_START = IRQ_STACK_START - CONFIG_STACKSIZE_IRQ;
 #endif
-	return (0);
+	return 0;
 }
 
 int cleanup_before_linux (void)
diff --git a/cpu/sa1100/start.S b/cpu/sa1100/start.S
index 6b4c948..0c8946e 100644
--- a/cpu/sa1100/start.S
+++ b/cpu/sa1100/start.S
@@ -92,14 +92,6 @@ _armboot_end_data:
 _armboot_end:
 	.word armboot_end
 
-/*
- * _armboot_real_end is the first usable RAM address behind armboot
- * and the various stacks
- */
-.globl _armboot_real_end
-_armboot_real_end:
-	.word 0x0badc0de
-
 #ifdef CONFIG_USE_IRQ
 /* IRQ stack memory (calculated at run-time) */
 .globl IRQ_STACK_START
@@ -134,32 +126,32 @@ reset:
 	bl	cpu_init_crit
 #endif
 
-relocate:
-	/*
-	 * relocate armboot to RAM
-	 */
-	adr	r0, _start		/* r0 <- current position of code */
+relocate:				/* relocate U-Boot to RAM	    */
+	adr	r0, _start		/* r0 <- current position of code   */
+	ldr	r1, _TEXT_BASE		/* test if we run from flash or RAM */
+	cmp     r0, r1                  /* don't reloc during debug         */
+	beq     stack_setup
+
 	ldr	r2, _armboot_start
 	ldr	r3, _armboot_end
-	sub	r2, r3, r2		/* r2 <- size of armboot */
-	ldr	r1, _TEXT_BASE		/* r1 <- destination address */
-	add	r2, r0, r2		/* r2 <- source end address */
+	sub	r2, r3, r2		/* r2 <- size of armboot            */
+	add	r2, r0, r2		/* r2 <- source end address         */
 
-	/*
-	 * r0 = source address
-	 * r1 = target address
-	 * r2 = source end address
-	 */
 copy_loop:
-	ldmia	r0!, {r3-r10}
-	stmia	r1!, {r3-r10}
-	cmp	r0, r2
+	ldmia	r0!, {r3-r10}		/* copy from source address [r0]    */
+	stmia	r1!, {r3-r10}		/* copy to   target address [r1]    */
+	cmp	r0, r2			/* until source end addreee [r2]    */
 	ble	copy_loop
 
-	/* set up the stack */
-	ldr	r0, _armboot_end
-	add	r0, r0, #CONFIG_STACKSIZE
-	sub	sp, r0, #12		/* leave 3 words for abort-stack */
+	/* Set up the stack						    */
+stack_setup:
+	ldr	r0, _TEXT_BASE		/* upper 128 KiB: relocated uboot   */
+	sub	r0, r0, #CFG_MALLOC_LEN	/* malloc area                      */
+	sub	r0, r0, #CFG_GBL_DATA_SIZE /* bdinfo                        */
+#ifdef CONFIG_USE_IRQ
+	sub	r0, r0, #(CONFIG_STACKSIZE_IRQ+CONFIG_STACKSIZE_FIQ)
+#endif
+	sub	sp, r0, #12		/* leave 3 words for abort-stack    */
 
 	ldr	pc, _start_armboot