* 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

CHANGELOG

@@ -2,6 +2,13 @@
 Changes since U-Boot 1.0.0:
 ======================================================================
 
+* 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
+
 * Accelerate booting on TRAB board: read and check  autoupdate  image
   headers first instead of always reading the whole images.
 

MAKEALL

@@ -1,5 +1,7 @@
 #!/bin/sh
 
+: ${JOBS:=}
+
 if [ "${CROSS_COMPILE}" ] ; then
 	MAKE="make CROSS_COMPILE=${CROSS_COMPILE}"
 else
@@ -179,7 +181,7 @@ build_target() {
 
 	${MAKE} distclean >/dev/null
 	${MAKE} ${target}_config
-	${MAKE} all 2>&1 >LOG/$target.MAKELOG | tee LOG/$target.ERR
+	${MAKE} ${JOBS} all 2>&1 >LOG/$target.MAKELOG | tee LOG/$target.ERR
 	${CROSS_COMPILE:-ppc_8xx-}size u-boot | tee -a LOG/$target.MAKELOG
 }
 

Makefile

@@ -77,24 +77,6 @@ endif
 
 export	CROSS_COMPILE
 
-# The "tools" are needed early, so put this first
-SUBDIRS	= tools \
-	  examples \
-	  lib_generic \
-	  lib_$(ARCH) \
-	  cpu/$(CPU) \
-	  board/$(BOARDDIR) \
-	  common \
-	  disk \
-	  fs \
-	  net \
-	  rtc \
-	  dtt \
-	  drivers \
-	  drivers/sk98lin \
-	  post \
-	  post/cpu
-
 #########################################################################
 # U-Boot objects....order is important (i.e. start must be first)
 
@@ -123,9 +105,17 @@ LIBS += drivers/sk98lin/libsk98lin.a
 LIBS += post/libpost.a post/cpu/libcpu.a
 LIBS += common/libcommon.a
 LIBS += lib_generic/libgeneric.a
+
 # Add GCC lib
 PLATFORM_LIBS += -L $(shell dirname `$(CC) $(CFLAGS) -print-libgcc-file-name`) -lgcc
 
+# The "tools" are needed early, so put this first
+# Don't include stuff already done in $(LIBS)
+SUBDIRS	= tools \
+	  examples \
+	  post \
+	  post/cpu
+
 #########################################################################
 #########################################################################
 
@@ -149,14 +139,18 @@ u-boot.img:	u-boot.bin
 u-boot.dis:	u-boot
 		$(OBJDUMP) -d $< > $@
 
-u-boot:		depend subdirs $(OBJS) $(LIBS) $(LDSCRIPT)
+u-boot:		depend $(SUBDIRS) $(OBJS) $(LIBS) $(LDSCRIPT)
 		UNDEF_SYM=`$(OBJDUMP) -x $(LIBS) |sed  -n -e 's/.*\(__u_boot_cmd_.*\)/-u\1/p'|sort|uniq`;\
 		$(LD) $(LDFLAGS) $$UNDEF_SYM $(OBJS) \
 			--start-group $(LIBS) $(PLATFORM_LIBS) --end-group \
 			-Map u-boot.map -o u-boot
 
-subdirs:
-		@for dir in $(SUBDIRS) ; do $(MAKE) -C $$dir || exit 1 ; done
+$(LIBS):
+		$(MAKE) -C `dirname $@`
+
+$(SUBDIRS):
+		@echo "#### MAKE $@ ####"
+		$(MAKE) -C $@
 
 gdbtools:
 		$(MAKE) -C tools/gdb || exit 1
@@ -884,12 +878,12 @@ trab_old_config:	unconfig
 	@[ -z "$(findstring _bigflash,$@)" ] || \
 		{ echo "#define CONFIG_RAM_16MB" >>include/config.h ; \
 		  echo "... with 16 MB Flash, 16 MB RAM" ; \
-		  echo "TEXT_BASE = 0x0CF00000" >board/trab/config.tmp ; \
+		  echo "TEXT_BASE = 0x0CF40000" >board/trab/config.tmp ; \
 		}
 	@[ -z "$(findstring _old,$@)" ] || \
 		{ echo "#define CONFIG_OLD_VERSION" >>include/config.h ; \
 		  echo "... with small memory configuration" ; \
-		  echo "TEXT_BASE = 0x0CF00000" >board/trab/config.tmp ; \
+		  echo "TEXT_BASE = 0x0CF40000" >board/trab/config.tmp ; \
 		}
 	@./mkconfig -a $(call xtract_trab,$@) arm arm920t trab
 

README

@@ -1353,7 +1353,7 @@ The following options need to be configured:
 		of the backslashes before semicolons and special
 		symbols.
 
-- Default Environment
+- Default Environment:
 		CONFIG_EXTRA_ENV_SETTINGS
 
 		Define this to contain any number of null terminated
@@ -1379,14 +1379,14 @@ The following options need to be configured:
 		the environment like the autoscript function or the
 		boot command first.
 
-- DataFlash Support
+- DataFlash Support:
 		CONFIG_HAS_DATAFLASH
 
 		Defining this option enables DataFlash features and
 		allows to read/write in Dataflash via the standard
 		commands cp, md...
 
-- Show boot progress
+- Show boot progress:
 		CONFIG_SHOW_BOOT_PROGRESS
 
 		Defining this option allows to add some board-
@@ -1466,6 +1466,19 @@ Modem Support:
 		Enables debugging stuff (char screen[1024], dbg())
 		for modem support. Useful only with BDI2000.
 
+- Interrupt support (PPC):
+
+                There are common interrupt_init() and timer_interrupt()
+                for all PPC archs. interrupt_init() calls interrupt_init_cpu()
+                for cpu specific initialization. interrupt_init_cpu()
+                should set decrementer_count to appropriate value. If
+                cpu resets decrementer automatically after interrupt
+                (ppc4xx) it should set decrementer_count to zero.
+                timer_interrupt() calls timer_interrupt_cpu() for cpu
+                specific handling. If board has watchdog / status_led
+                / other_activity_monitor it works automatically from
+                general timer_interrupt().
+
 - General:
 
 		In the target system modem support is enabled when a

board/at91rm9200dk/config.mk

@@ -1 +1 @@
-TEXT_BASE = 0x21f00000
+TEXT_BASE = 0x21f80000

board/cogent/lcd.c

@@ -229,3 +229,17 @@ lcd_heartbeat(void)
     if (++rotator_index >= (sizeof rotchars / sizeof rotchars[0]))
 	rotator_index = 0;
 }
+
+#ifdef CONFIG_SHOW_ACTIVITY
+void board_show_activity (ulong timestamp)
+{
+#ifdef CONFIG_STATUS_LED
+	if ((timestamp % (CFG_HZ / 2) == 0)
+		lcd_heartbeat ();
+#endif
+}
+
+void show_activity(int arg)
+{
+}
+#endif

board/cradle/config.mk

@@ -1,2 +1,2 @@
-TEXT_BASE = 0xa0f08000
+TEXT_BASE = 0xa0f80000
 #TEXT_BASE = 0

board/dnp1110/config.mk

@@ -11,7 +11,7 @@
 #
 # Linux-Kernel is expected to be at c000'8000, entry c000'8000
 #
-# we load ourself to c1f0'0000, the upper 1 MB of the first (only) bank
+# we load ourself to c1f8'0000, the upper 1 MB of the first (only) bank
 #
 
-TEXT_BASE = 0xc1f00000
+TEXT_BASE = 0xc1f80000

board/ep7312/config.mk

@@ -25,4 +25,4 @@
 # MA 02111-1307 USA
 #
 
-TEXT_BASE = 0xc0f00000
+TEXT_BASE = 0xc0f80000

board/hymod/hymod.c

@@ -513,3 +513,25 @@ last_stage_init (void)
 
 	return (0);
 }
+
+#ifdef CONFIG_SHOW_ACTIVITY
+void board_show_activity (ulong timebase)
+{
+#ifdef CFG_HYMOD_DBLEDS
+	volatile immap_t *immr = (immap_t *) CFG_IMMR;
+	volatile iop8260_t *iop = &immr->im_ioport;
+	static int shift = 0;
+
+	if ((timestamp % CFG_HZ) == 0) {
+		if (++shift > 3)
+			shift = 0;
+		iop->iop_pdatd =
+				(iop->iop_pdatd & ~0x0f000000) | (1 << (24 + shift));
+	}
+#endif /* CFG_HYMOD_DBLEDS */
+}
+
+void show_activity(int arg)
+{
+}
+#endif /* CONFIG_SHOW_ACTIVITY */

board/impa7/config.mk

@@ -25,4 +25,4 @@
 # MA 02111-1307 USA
 #
 
-TEXT_BASE = 0xc1700000
+TEXT_BASE = 0xc1780000

board/lart/config.mk

@@ -14,10 +14,10 @@
 #
 # Linux-Kernel is expected to be at c000'8000, entry c000'8000
 #
-# we load ourself to c170'0000, the upper 1 MB of second bank
+# we load ourself to c178'0000, the upper 1 MB of second bank
 #
 # download areas is c800'0000
 #
 
 
-TEXT_BASE = 0xc1700000
+TEXT_BASE = 0xc1780000

board/oxc/oxc.c

@@ -156,6 +156,12 @@ void oxc_toggle_activeled(void)
 	ledtoggle++;
 }
 
+void board_show_activity (ulong timestamp)
+{
+	if ((timestamp % (CFG_HZ / 10)) == 0)
+		oxc_toggle_activeled ();
+}
+
 void show_activity(int arg)
 {
 	static unsigned char led = 0;

board/shannon/config.mk

@@ -14,10 +14,10 @@
 #
 # Linux-Kernel is expected to be at c000'8000, entry c000'8000
 #
-# we load ourself to d830'0000, the upper 1 MB of the last (4th) bank
+# we load ourself to d838'0000, the upper 1 MB of the last (4th) bank
 #
 # download areas is c800'0000
 #
 
 
-TEXT_BASE = 0xd8300000
+TEXT_BASE = 0xd8380000

board/trab/config.mk

@@ -22,5 +22,5 @@
 sinclude $(TOPDIR)/board/$(BOARDDIR)/config.tmp
 
 ifndef TEXT_BASE
-TEXT_BASE = 0x0DF00000
+TEXT_BASE = 0x0DF40000
 endif

board/wepep250/wepep250.c

@@ -40,15 +40,6 @@ int board_init( void ){
 #endif
   PSSR    = 0x20;
 
-/*
- * Following code is just bug workaround, remove it if not neccessary
- */
-
-  /* cpu/xscale/cpu.c do not set armboot_real_end that is used for
-     malloc pool.*/
-  if( _armboot_real_end == 0xbadc0de ){
-    _armboot_real_end = _armboot_end;
-  }
   return 0;
 }
 

common/Makefile

@@ -63,6 +63,9 @@ environment.o: environment.c ../tools/envcrc
 		-DENV_CRC=$(shell ../tools/envcrc) \
 		-c -o $@ environment.c
 
+../tools/envcrc:
+	$(MAKE) -C ../tools
+
 #########################################################################
 
 .depend:	Makefile $(AOBJS:.o=.S) $(COBJS:.o=.c)

common/xilinx.c

@@ -194,6 +194,7 @@ int xilinx_info (Xilinx_desc * desc)
 				/* Add new family types here */
 			default:
 				/* we don't need a message here - we give one up above */
+				;
 			}
 		} else
 			printf ("No Device Function Table.\n");

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;
 }
 
 /****************************************************************************/

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)

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
 

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)

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

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)

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
 

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)

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
 

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)

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

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;
@@ -45,74 +38,20 @@ 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;
 }

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;
 }
 
 /****************************************************************************/

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;
 }

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;
 }
 
 /****************************************************************************/

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;
 }
 
 /************************************************************************/

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;

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)
 
 /*******************************************************************************

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)

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: ???							    */

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)

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
 

doc/README.ARM-memory-map

@@ -0,0 +1,27 @@
+Subject: Re: [PATCH][CFT] bring ARM memory layout in line with the documented behaviour
+From: "Anders Larsen" <alarsen@rea.de>
+Date: Thu, 18 Sep 2003 14:15:21 +0200
+To: Wolfgang Denk <wd@denx.de>
+
+...
+>I still see  references  to  _armboot_start,  _armboot_end_data,  and
+>_armboot_end - which role do these play now? Can we get rid of them?
+>
+>How are they (should they be) set in your memory map above?
+
+_armboot_start contains the value of TEXT_BASE (0xA07E0000); it seems
+TEXT_BASE and _armboot_start are both used for the same purpose in
+different parts of the (ARM) code.
+Furthermore, the startup code (cpu/<arm>/start.S) internally uses
+another variable (_TEXT_BASE) with the same content as _armboot_start.
+I agree that this mess should be cleaned up.
+
+_armboot_end_data is the end address of the initialized data section,
+and is only used in one place (board/logodl/flash.c - the reference in
+lib_arm/board.c is purely informational).
+
+_armboot_end is the end address of the BSS and is used to determine
+the address of the VFD buffer.
+
+Eliminating those should be doable, and at least the patch already
+eliminates _armboot_real_end.

include/asm-arm/u-boot-arm.h

@@ -35,7 +35,6 @@ extern ulong _armboot_end_data;	/* code + data end */
 extern ulong _armboot_end;	/* BSS end */
 extern ulong IRQ_STACK_START;	/* top of IRQ stack */
 extern ulong FIQ_STACK_START;	/* top of FIQ stack */
-extern ulong _armboot_real_end;	/* first usable RAM address */
 
 /* cpu/.../cpu.c */
 int	cpu_init(void);

include/configs/VCMA9.h

@@ -97,6 +97,7 @@
  * Size of malloc() pool
  */
 #define CONFIG_MALLOC_SIZE	(CFG_ENV_SIZE + 128*1024)
+#define CFG_GBL_DATA_SIZE	128	/* size in bytes reserved for initial data */
 
 #define CFG_MONITOR_LEN		(256 * 1024)
 #define CFG_MALLOC_LEN		(128 * 1024)

include/configs/at91rm9200dk.h

@@ -25,6 +25,12 @@
 #ifndef __CONFIG_H
 #define __CONFIG_H
 
+/*
+ * If we are developing, we might want to start armboot from ram
+ * so we MUST NOT initialize critical regs like mem-timing ...
+ */
+#define CONFIG_INIT_CRITICAL            /* undef for developing */
+
 /* ARM asynchronous clock */
 #define AT91C_MAIN_CLOCK  179712000  /* from 18.432 MHz crystal (18432000 / 4 * 39) */
 #define AT91C_MASTER_CLOCK  59904000  /* peripheral clock (AT91C_MASTER_CLOCK / 3) */
@@ -40,7 +46,10 @@
  * Size of malloc() pool
  */
 #define CFG_MALLOC_LEN	(CFG_ENV_SIZE + 128*1024)
+#define CFG_GBL_DATA_SIZE	128	/* size in bytes reserved for initial data */
+
 #define CONFIG_BAUDRATE 115200
+
 /*
  * Hardware drivers
  */

include/configs/cogent_mpc8260.h

@@ -160,6 +160,7 @@
 #define CFG_CMA_CONS_SERIAL	/* use Cogent motherboard serial for console */
 #endif
 #define CFG_CMA_LCD_HEARTBEAT	/* define for sec rotator in lcd corner */
+#define CONFIG_SHOW_ACTIVITY
 
 #if (CMA_MB_CAPS & CMA_MB_CAP_FLASH)
 /*

include/configs/cogent_mpc8xx.h

@@ -126,6 +126,7 @@
 #define CFG_CMA_CONS_SERIAL	/* use Cogent motherboard serial for console */
 #define CONFIG_CONS_INDEX	1
 #define CFG_CMA_LCD_HEARTBEAT	/* define for sec rotator in lcd corner */
+#define CONFIG_SHOW_ACTIVITY
 #if (CMA_MB_CAPS & CMA_MB_CAP_FLASH)
 /*
  * flash exists on the motherboard

include/configs/cradle.h

@@ -47,6 +47,7 @@
  * Size of malloc() pool
  */
 #define CFG_MALLOC_LEN		(CFG_ENV_SIZE + 128*1024)
+#define CFG_GBL_DATA_SIZE	128	/* size in bytes reserved for initial data */
 
 /*
  * Hardware drivers

include/configs/csb226.h

@@ -94,6 +94,7 @@
  *
  */
 #define CFG_MALLOC_LEN		(128*1024)
+#define CFG_GBL_DATA_SIZE	128		/* size in bytes reserved for initial data */
 
 #define CFG_LONGHELP				/* undef to save memory         */
 #define CFG_PROMPT		"uboot> "	/* Monitor Command Prompt       */

include/configs/dnp1110.h

@@ -47,6 +47,7 @@
  * Size of malloc() pool
  */
 #define CFG_MALLOC_LEN		(CFG_ENV_SIZE + 128*1024)
+#define CFG_GBL_DATA_SIZE	128	/* size in bytes reserved for initial data */
 
 /*
  * Hardware drivers

include/configs/ep7312.h

@@ -48,6 +48,7 @@
  * Size of malloc() pool
  */
 #define CFG_MALLOC_LEN		(CFG_ENV_SIZE + 128*1024)
+#define CFG_GBL_DATA_SIZE	128	/* size in bytes reserved for initial data */
 
 /*
  * Hardware drivers

include/configs/impa7.h

@@ -48,6 +48,7 @@
  * Size of malloc() pool
  */
 #define CFG_MALLOC_LEN		(CFG_ENV_SIZE + 128*1024)
+#define CFG_GBL_DATA_SIZE	128	/* size in bytes reserved for initial data */
 
 /*
  * Hardware drivers

include/configs/innokom.h

@@ -87,6 +87,7 @@
  *
  */
 #define CFG_MALLOC_LEN		(256*1024)
+#define CFG_GBL_DATA_SIZE	128		/* size in bytes reserved for initial data */
 
 #define CFG_LONGHELP				/* undef to save memory         */
 #define CFG_PROMPT		"uboot> "	/* Monitor Command Prompt       */

include/configs/lart.h

@@ -46,6 +46,7 @@
  * Size of malloc() pool
  */
 #define CFG_MALLOC_LEN		(CFG_ENV_SIZE + 128*1024)
+#define CFG_GBL_DATA_SIZE	128	/* size in bytes reserved for initial data */
 
 /*
  * Hardware drivers

include/configs/lubbock.h

@@ -52,6 +52,7 @@
  * Size of malloc() pool
  */
 #define CFG_MALLOC_LEN	    (CFG_ENV_SIZE + 128*1024)
+#define CFG_GBL_DATA_SIZE	128	/* size in bytes reserved for initial data */
 
 /*
  * Hardware drivers

include/configs/lwmon.h

@@ -113,6 +113,7 @@
 #undef	CFG_LOADS_BAUD_CHANGE		/* don't allow baudrate change	*/
 
 #define	CONFIG_WATCHDOG		1	/* watchdog enabled		*/
+#define	CFG_WATCHDOG_FREQ       (CFG_HZ / 20)
 
 #undef	CONFIG_STATUS_LED		/* Status LED disabled		*/
 

include/configs/omap1510inn.h

@@ -26,6 +26,12 @@
 #ifndef __CONFIG_H
 #define __CONFIG_H
 
+/*
+ * If we are developing, we might want to start armboot from ram
+ * so we MUST NOT initialize critical regs like mem-timing ...
+ */
+#define CONFIG_INIT_CRITICAL            /* undef for developing */
+
 /*
  * High Level Configuration Options
  * (easy to change)
@@ -49,6 +55,7 @@
  * Size of malloc() pool
  */
 #define CFG_MALLOC_LEN		(CFG_ENV_SIZE + 128*1024)
+#define CFG_GBL_DATA_SIZE	128	/* size in bytes reserved for initial data */
 
 /*
  * Hardware drivers

include/configs/omap1610inn.h

@@ -26,6 +26,12 @@
 #ifndef __CONFIG_H
 #define __CONFIG_H
 
+/*
+ * If we are developing, we might want to start armboot from ram
+ * so we MUST NOT initialize critical regs like mem-timing ...
+ */
+#define CONFIG_INIT_CRITICAL            /* undef for developing */
+
 /*
  * High Level Configuration Options
  * (easy to change)
@@ -50,6 +56,7 @@
  * Size of malloc() pool
  */
 #define CFG_MALLOC_LEN	(CFG_ENV_SIZE + 128*1024)
+#define CFG_GBL_DATA_SIZE	128	/* size in bytes reserved for initial data */
 
 /*
  * Hardware drivers
@@ -66,14 +73,13 @@
 #define CFG_NS16550
 #define CFG_NS16550_SERIAL
 #define CFG_NS16550_REG_SIZE	(-4)
-#define CFG_NS16550_CLK	(48000000)	/* can be 12M/32Khz or 48Mhz */
-#define CFG_NS16550_COM1	0xfffb0000	/* uart1, bluetooth uart
-						on helen */
+#define CFG_NS16550_CLK		(48000000)	/* can be 12M/32Khz or 48Mhz */
+#define CFG_NS16550_COM1	0xfffb0000	/* uart1, bluetooth uart on helen */
 
 /*
  * select serial console configuration
  */
-#define CONFIG_SERIAL1	1	/* we use SERIAL 1 on OMAP1610 Innovator */
+#define CONFIG_SERIAL1		1		/* we use SERIAL 1 on OMAP1610 Innovator */
 
 /* allow to overwrite serial and ethaddr */
 #define CONFIG_ENV_OVERWRITE

include/configs/shannon.h

@@ -52,6 +52,7 @@
  * Size of malloc() pool
  */
 #define CFG_MALLOC_LEN		(CFG_ENV_SIZE + 128*1024)
+#define CFG_GBL_DATA_SIZE	128	/* size in bytes reserved for initial data */
 
 /*
  * Hardware drivers

include/configs/smdk2400.h

@@ -55,6 +55,7 @@
  * Size of malloc() pool
  */
 #define CFG_MALLOC_LEN		(CFG_ENV_SIZE + 128*1024)
+#define CFG_GBL_DATA_SIZE	128	/* size in bytes reserved for initial data */
 
 /*
  * Hardware drivers

include/configs/smdk2410.h

@@ -54,6 +54,7 @@
  * Size of malloc() pool
  */
 #define CFG_MALLOC_LEN		(CFG_ENV_SIZE + 128*1024)
+#define CFG_GBL_DATA_SIZE	128	/* size in bytes reserved for initial data */
 
 /*
  * Hardware drivers

include/configs/trab.h

@@ -89,6 +89,7 @@
  * Size of malloc() pool
  */
 #define CFG_MALLOC_LEN		(CFG_ENV_SIZE + 128*1024)
+#define CFG_GBL_DATA_SIZE	128	/* size in bytes reserved for initial data */
 
 /*
  * Hardware drivers

include/configs/wepep250.h

@@ -23,6 +23,12 @@
 #ifndef __CONFIG_H
 #define __CONFIG_H
 
+/*
+ * If we are developing, we might want to start armboot from ram
+ * so we MUST NOT initialize critical regs like mem-timing ...
+ */
+#define CONFIG_INIT_CRITICAL            /* undef for developing */
+
 #define CONFIG_PXA250          1        /* this is an PXA250 CPU     */
 #define CONFIG_WEPEP250        1        /* config for wepep250 board */
 #undef  CONFIG_USE_IRQ                  /* don't need use IRQ/FIQ    */
@@ -93,6 +99,7 @@
  * Malloc pool need to host env + 128 Kb reserve for other allocations.
  */
 #define CFG_MALLOC_LEN	  (CFG_ENV_SIZE + (128<<10) )
+#define CFG_GBL_DATA_SIZE	128	/* size in bytes reserved for initial data */
 
 #define CONFIG_STACKSIZE        (120<<10)      /* stack size */
 

lib_arm/board.c

@@ -149,7 +149,7 @@ static int display_dram_config (void)
 		return (0);
 #endif
 
-	puts ("DRAM Configuration:\n");
+	puts ("RAM Configuration:\n");
 
 	for(i=0; i<CONFIG_NR_DRAM_BANKS; i++) {
 		printf ("Bank #%d: %08lx ", i, gd->bd->bi_dram[i].start);
@@ -173,7 +173,7 @@ static void display_flash_config (ulong size)
 
 
 /*
- * Breath some life into the board...
+ * Breathe some life into the board...
  *
  * Initialize a serial port as console, and carry out some hardware
  * tests.
@@ -219,8 +219,6 @@ void start_armboot (void)
 	DECLARE_GLOBAL_DATA_PTR;
 
 	ulong size;
-	gd_t gd_data;
-	bd_t bd_data;
 	init_fnc_t **init_fnc_ptr;
 	char *s;
 #if defined(CONFIG_VFD)
@@ -228,9 +226,9 @@ void start_armboot (void)
 #endif
 
 	/* Pointer is writable since we allocated a register for it */
-	gd = &gd_data;
-	memset ((void *)gd, 0, sizeof (gd_t));
-	gd->bd = &bd_data;
+	gd = (gd_t*)(_armboot_start - CFG_MALLOC_LEN - sizeof(gd_t));
+	memset ((void*)gd, 0, sizeof (gd_t));
+	gd->bd = (bd_t*)((char*)gd - sizeof(bd_t));
 	memset (gd->bd, 0, sizeof (bd_t));
 
 	monitor_flash_len = _armboot_end_data - _armboot_start;
@@ -246,25 +244,21 @@ void start_armboot (void)
 	display_flash_config (size);
 
 #ifdef CONFIG_VFD
-#  ifndef PAGE_SIZE
-#   define PAGE_SIZE 4096
-#  endif
+#	ifndef PAGE_SIZE
+#	  define PAGE_SIZE 4096
+#	endif
 	/*
 	 * reserve memory for VFD display (always full pages)
 	 */
-	/* armboot_real_end is defined in the board-specific linker script */
-	addr = (_armboot_real_end + (PAGE_SIZE - 1)) & ~(PAGE_SIZE - 1);
+	/* armboot_end is defined in the board-specific linker script */
+	addr = (_armboot_end + (PAGE_SIZE - 1)) & ~(PAGE_SIZE - 1);
 	size = vfd_setmem (addr);
 	gd->fb_base = addr;
-	/* round to the next page boundary */
-	addr += size;
-	addr = (addr + (PAGE_SIZE - 1)) & ~(PAGE_SIZE - 1);
-	mem_malloc_init (addr);
-#else
-	/* armboot_real_end is defined in the board-specific linker script */
-	mem_malloc_init (_armboot_real_end);
 #endif /* CONFIG_VFD */
 
+	/* armboot_start is defined in the board-specific linker script */
+	mem_malloc_init (_armboot_start - CFG_MALLOC_LEN);
+
 #if (CONFIG_COMMANDS & CFG_CMD_NAND)
 	puts ("NAND:");
 	nand_init();		/* go init the NAND */
@@ -281,10 +275,10 @@ void start_armboot (void)
 #ifdef CONFIG_VFD
 	/* must do this after the framebuffer is allocated */
 	drv_vfd_init();
-#endif
+#endif /* CONFIG_VFD */
 
 	/* IP Address */
-	bd_data.bi_ip_addr = getenv_IPaddr ("ipaddr");
+	gd->bd->bi_ip_addr = getenv_IPaddr ("ipaddr");
 
 	/* MAC Address */
 	{
@@ -297,7 +291,7 @@ void start_armboot (void)
 		s = (i > 0) ? tmp : NULL;
 
 		for (reg = 0; reg < 6; ++reg) {
-			bd_data.bi_enetaddr[reg] = s ? simple_strtoul (s, &e, 16) : 0;
+			gd->bd->bi_enetaddr[reg] = s ? simple_strtoul (s, &e, 16) : 0;
 			if (s)
 				s = (*e) ? e + 1 : e;
 		}
@@ -317,6 +311,7 @@ void start_armboot (void)
 	/* enable exceptions */
 	enable_interrupts ();
 
+	/* Perform network card initialisation if necessary */
 #ifdef CONFIG_DRIVER_CS8900
 	cs8900_get_enetaddr (gd->bd->bi_enetaddr);
 #endif

lib_ppc/Makefile

@@ -28,7 +28,7 @@ LIB	= lib$(ARCH).a
 AOBJS	= ppcstring.o ticks.o
 
 COBJS	= board.o \
-	  bat_rw.o cache.o extable.o kgdb.o time.o
+	  bat_rw.o cache.o extable.o kgdb.o time.o interrupts.o
 
 OBJS	= $(AOBJS) $(COBJS)
 

lib_ppc/interrupts.c

@@ -0,0 +1,148 @@
+/*
+ * (C) Copyright 2000-2002
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * (C) Copyright 2003
+ * Gleb Natapov <gnatapov@mrv.com>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <asm/processor.h>
+#include <watchdog.h>
+#ifdef CONFIG_STATUS_LED
+#include <status_led.h>
+#endif
+
+#ifdef CONFIG_SHOW_ACTIVITY
+	extern void board_show_activity (ulong);
+#endif /* CONFIG_SHOW_ACTIVITY */
+
+#ifndef CFG_WATCHDOG_FREQ
+#define CFG_WATCHDOG_FREQ (CFG_HZ / 2)
+#endif
+
+extern int interrupt_init_cpu (unsigned *);
+extern void timer_interrupt_cpu (struct pt_regs *);
+
+static 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)
+{
+	if (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 ret;
+
+        /* call cpu specific function from $(CPU)/interrupts.c */
+	ret = interrupt_init_cpu (&decrementer_count);
+
+	if (ret)
+		return ret;
+
+	set_dec (decrementer_count);
+
+	set_msr (get_msr () | MSR_EE);
+
+	return (0);
+}
+
+static volatile ulong timestamp = 0;
+
+void timer_interrupt (struct pt_regs *regs)
+{
+	/* call cpu specific function from $(CPU)/interrupts.c */
+	timer_interrupt_cpu (regs);
+
+	/* Restore Decrementer Count */
+	set_dec (decrementer_count);
+
+	timestamp++;
+
+#if defined(CONFIG_WATCHDOG) || defined (CONFIG_HW_WATCHDOG)
+	if ((timestamp % (CFG_WATCHDOG_FREQ)) == 0)
+		WATCHDOG_RESET ();
+#endif    /* CONFIG_WATCHDOG || CONFIG_HW_WATCHDOG */
+
+#ifdef CONFIG_STATUS_LED
+        status_led_tick (timestamp);
+#endif /* CONFIG_STATUS_LED */
+
+#ifdef CONFIG_SHOW_ACTIVITY
+	board_show_activity (timestamp);
+#endif /* CONFIG_SHOW_ACTIVITY */
+}
+
+void reset_timer (void)
+{
+	timestamp = 0;
+}
+
+ulong get_timer (ulong base)
+{
+	return (timestamp - base);
+}
+
+void set_timer (ulong t)
+{
+	timestamp = t;
+}

tools/Makefile

@@ -180,12 +180,14 @@ else
 endif
 
 environment.c:
+		@rm -f environment.c
 		ln -s ../common/environment.c environment.c
 
 environment.o: environment.c
 		$(CC) -g $(HOST_ENVIRO_CFLAGS) $(CPPFLAGS) -c $<
 
 crc32.c:
+		@rm -f crc32.c
 		ln -s ../lib_generic/crc32.c crc32.c
 
 $(LOGO_H):	bmp_logo $(LOGO_BMP)