[Microblaze][PATCH] part 2

timer support
interrupt controller support
flash support
ethernet support
cache support
board information support
env support
booting image support

adding support for Xilinx ML401

MAKEALL

@@ -292,7 +292,7 @@ LIST_nios2="	\
 #########################################################################
 
 LIST_microblaze="	\
-	suzaku
+	suzaku		ml401
 "
 
 #########################################################################

Makefile

@@ -2304,6 +2304,11 @@ suzaku_config:	unconfig
 	@echo "#define CONFIG_SUZAKU 1" >> $(obj)include/config.h
 	@$(MKCONFIG) -a $(@:_config=) microblaze microblaze suzaku AtmarkTechno
 
+ml401_config:	unconfig
+	@ >include/config.h
+	@echo "#define CONFIG_ML401 1" >> include/config.h
+	@./mkconfig -a $(@:_config=) microblaze microblaze ml401 xilinx
+
 #########################################################################
 ## Blackfin
 #########################################################################
@@ -2381,3 +2386,4 @@ backup:
 	gtar --force-local -zcvf `date "+$$F-%Y-%m-%d-%T.tar.gz"` $$F
 
 #########################################################################
+

board/AtmarkTechno/suzaku/u-boot.lds

@@ -61,6 +61,6 @@ SECTIONS
 	{
 		__bss_start = .;
 		*(.bss)
-		__bss_start = .;
+		__bss_end = .;
 	}
 }

board/xilinx/xilinx_enet/emac_adapter.c

@@ -147,7 +147,11 @@ eth_rx(void)
 	RecvFrameLength = PKTSIZE;
 	Result = XEmac_PollRecv(&Emac, (u8 *) etherrxbuff, &RecvFrameLength);
 	if (Result == XST_SUCCESS) {
+#ifndef CONFIG_MICROBLAZE 
 		NetReceive((uchar *)etherrxbuff, RecvFrameLength);
+#else
+		NetReceive(etherrxbuff, RecvFrameLength);
+#endif
 		return (1);
 	} else {
 		return (0);

common/cmd_bdinfo.c

@@ -180,6 +180,32 @@ int do_bdinfo ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 
 	return 0;
 }
+#elif defined(CONFIG_MICROBLAZE) /* ! PPC, which leaves Microblaze */
+
+int do_bdinfo ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
+{
+	int i;
+	bd_t *bd = gd->bd;
+	print_num ("mem start      ",	(ulong)bd->bi_memstart);
+	print_num ("mem size       ",	(ulong)bd->bi_memsize);
+	print_num ("flash start    ",	(ulong)bd->bi_flashstart);
+	print_num ("flash size     ",	(ulong)bd->bi_flashsize);
+	print_num ("flash offset   ",	(ulong)bd->bi_flashoffset);
+#if defined(CFG_SRAM_BASE)
+	print_num ("sram start     ",	(ulong)bd->bi_sramstart);
+	print_num ("sram size      ",	(ulong)bd->bi_sramsize);
+#endif
+#if defined(CFG_CMD_NET)
+	puts ("ethaddr     =");
+	for (i=0; i<6; ++i) {
+		printf ("%c%02X", i ? ':' : ' ', bd->bi_enetaddr[i]);
+	}
+	puts ("\nip_addr     = ");
+	print_IPaddr (bd->bi_ip_addr);
+#endif
+	printf ("\nbaudrate    = %d bps\n", (ulong)bd->bi_baudrate);
+	return 0;
+}
 
 #else /* ! PPC, which leaves MIPS */
 

common/env_common.c

@@ -222,6 +222,14 @@ void env_relocate (void)
 	DEBUGF ("%s[%d] malloced ENV at %p\n", __FUNCTION__,__LINE__,env_ptr);
 #endif
 
+#ifdef CONFIG_MICROBLAZE
+	/*
+	 * FIXME MALLOC error for Microblaze - error malloc return
+	 * bad value. Correct value is CFG_MONITOR_BASE - CFG_MALLOC_LEN.
+	 */
+	env_ptr = (env_t *)CFG_MONITOR_BASE;
+	DEBUGF ("%s[%d] malloced ENV at %p\n", __FUNCTION__,__LINE__,env_ptr);
+#endif
 	/*
 	 * After relocation to RAM, we can always use the "memory" functions
 	 */

cpu/microblaze/Makefile

@@ -26,7 +26,8 @@ include $(TOPDIR)/config.mk
 LIB	= $(obj)lib$(CPU).a
 
 START	= start.o
-COBJS	= cpu.o interrupts.o
+SOBJS	= dcache.o icache.o irq.o disable_int.o enable_int.o
+COBJS	= cpu.o interrupts.o cache.o exception.o timer.o
 
 SRCS	:= $(START:.o=.S) $(SOBJS:.o=.S) $(COBJS:.o=.c)
 OBJS	:= $(addprefix $(obj),$(SOBJS) $(COBJS))

cpu/microblaze/interrupts.c

@@ -1,6 +1,8 @@
 /*
+ * (C) Copyright 2007 Michal Simek
  * (C) Copyright 2004 Atmark Techno, Inc.
  *
+ * Michal  SIMEK <monstr@monstr.eu>
  * Yasushi SHOJI <yashi@atmark-techno.com>
  *
  * See file CREDITS for list of people who contributed to this
@@ -13,7 +15,7 @@
  *
  * 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
+ * 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
@@ -22,11 +24,185 @@
  * MA 02111-1307 USA
  */
 
-void enable_interrupts(void)
+#include <common.h>
+#include <command.h>
+#include <asm/microblaze_intc.h>
+
+#undef DEBUG_INT
+
+extern void microblaze_disable_interrupts (void);
+extern void microblaze_enable_interrupts (void);
+
+void enable_interrupts (void)
 {
+	microblaze_enable_interrupts ();
 }
 
-int disable_interrupts(void)
+int disable_interrupts (void)
 {
+	microblaze_disable_interrupts ();
 	return 0;
 }
+
+#ifdef CFG_INTC_0
+#ifdef CFG_TIMER_0
+extern void timer_init (void);
+#endif
+
+static struct irq_action vecs[CFG_INTC_0_NUM];
+
+/* mapping structure to interrupt controller */
+microblaze_intc_t *intc = (microblaze_intc_t *) (CFG_INTC_0_ADDR);
+
+/* default handler */
+void def_hdlr (void)
+{
+	puts ("def_hdlr\n");
+}
+
+void enable_one_interrupt (int irq)
+{
+	int mask;
+	int offset = 1;
+	offset <<= irq;
+	mask = intc->ier;
+	intc->ier = (mask | offset);
+#ifdef DEBUG_INT
+	printf ("Enable one interrupt irq %x - mask %x,ier %x\n", offset, mask,
+		intc->ier);
+	printf ("INTC isr %x, ier %x, iar %x, mer %x\n", intc->isr, intc->ier,
+		intc->iar, intc->mer);
+#endif
+}
+
+void disable_one_interrupt (int irq)
+{
+	int mask;
+	int offset = 1;
+	offset <<= irq;
+	mask = intc->ier;
+	intc->ier = (mask & ~offset);
+#ifdef DEBUG_INT
+	printf ("Disable one interrupt irq %x - mask %x,ier %x\n", irq, mask,
+		intc->ier);
+	printf ("INTC isr %x, ier %x, iar %x, mer %x\n", intc->isr, intc->ier,
+		intc->iar, intc->mer);
+#endif
+}
+
+/* adding new handler for interrupt */
+void install_interrupt_handler (int irq, interrupt_handler_t * hdlr, void *arg)
+{
+	struct irq_action *act;
+	/* irq out of range */
+	if ((irq < 0) || (irq > CONFIG_XILINX_INTC_0_NUM_INTR_INPUTS)) {
+		puts ("IRQ out of range\n");
+		return;
+	}
+	act = &vecs[irq];
+	if (hdlr) {		/* enable */
+		act->handler = hdlr;
+		act->arg = arg;
+		act->count = 0;
+		enable_one_interrupt (irq);
+	} else {		/* disable */
+
+		act->handler = (interrupt_handler_t *) def_hdlr;
+		act->arg = (void *)irq;
+		disable_one_interrupt (irq);
+	}
+}
+
+/* initialization interrupt controller - hardware */
+void intc_init (void)
+{
+	intc->mer = 0;
+	intc->ier = 0;
+	intc->iar = 0xFFFFFFFF;
+	/* XIntc_Start - hw_interrupt enable and all interrupt enable */
+	intc->mer = 0x3;
+#ifdef DEBUG_INT
+	printf ("INTC isr %x, ier %x, iar %x, mer %x\n", intc->isr, intc->ier,
+		intc->iar, intc->mer);
+#endif
+}
+
+int interrupts_init (void)
+{
+	int i;
+	/* initialize irq list */
+	for (i = 0; i < CONFIG_XILINX_INTC_0_NUM_INTR_INPUTS; i++) {
+		vecs[i].handler = (interrupt_handler_t *) def_hdlr;
+		vecs[i].arg = (void *)i;
+		vecs[i].count = 0;
+	}
+	/* initialize intc controller */
+	intc_init ();
+#ifdef CFG_TIMER_0
+	timer_init ();
+#endif
+	enable_interrupts ();
+	return 0;
+}
+
+void interrupt_handler (void)
+{
+	int irqs;
+	irqs = (intc->isr & intc->ier);	/* find active interrupt */
+
+#ifdef DEBUG_INT
+	printf ("INTC isr %x, ier %x, iar %x, mer %x\n", intc->isr, intc->ier,
+		intc->iar, intc->mer);
+	printf ("Interrupt handler on %x line, r14 %x\n", irqs, value);
+#endif
+	struct irq_action *act = vecs;
+	while (irqs) {
+		if (irqs & 1) {
+#ifdef DEBUG_INT
+			printf
+			    ("Jumping to interrupt handler rutine addr %x,count %x,arg %x\n",
+			     act->handler, act->count, act->arg);
+#endif
+			act->handler (act->arg);
+			act->count++;
+		}
+		irqs >>= 1;
+		act++;
+	}
+	intc->iar = 0xFFFFFFFF;	/* erase all events */
+#ifdef DEBUG
+	printf ("Dump INTC reg, isr %x, ier %x, iar %x, mer %x\n", intc->isr,
+		intc->ier, intc->iar, intc->mer);
+	printf ("Interrupt handler on %x line, r14\n", irqs);
+#endif
+}
+#endif
+
+#if (CONFIG_COMMANDS & CFG_CMD_IRQ)
+#ifdef CFG_INTC_0
+int do_irqinfo (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
+{
+	int i;
+	struct irq_action *act = vecs;
+
+	puts ("\nInterrupt-Information:\n\n"
+	      "Nr  Routine   Arg       Count\n"
+	      "-----------------------------\n");
+
+	for (i = 0; i < CONFIG_XILINX_INTC_0_NUM_INTR_INPUTS; i++) {
+		if (act->handler != (interrupt_handler_t*) def_hdlr) {
+			printf ("%02d  %08lx  %08lx  %d\n", i,
+				(int)act->handler, (int)act->arg, act->count);
+		}
+		act++;
+	}
+	puts ("\n");
+	return (0);
+}
+#else
+int do_irqinfo (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
+{
+	puts ("Undefined interrupt controller\n");
+}
+#endif
+#endif				/* CONFIG_COMMANDS & CFG_CMD_IRQ */

cpu/microblaze/start.S

@@ -1,6 +1,8 @@
 /*
+ * (C) Copyright 2007 Michal Simek
  * (C) Copyright 2004 Atmark Techno, Inc.
  *
+ * Michal  SIMEK <monstr@monstr.eu>
  * Yasushi SHOJI <yashi@atmark-techno.com>
  *
  * See file CREDITS for list of people who contributed to this
@@ -13,7 +15,7 @@
  *
  * 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
+ * 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
@@ -27,10 +29,62 @@
 	.text
 	.global _start
 _start:
+	mts	rmsr, r0	/* disable cache */
+	addi	r1, r0, CFG_INIT_SP_OFFSET
+	/* add opcode instruction for 32bit jump - 2 instruction imm & brai*/
+	addi	r6, r0, 0xb000	/* hex b000 opcode imm */
+	bslli	r6, r6, 16	/* shift */
+	swi	r6, r0, 0x0	/* reset address */
+	swi	r6, r0, 0x8	/* user vector exception */
+	swi	r6, r0, 0x10	/* interrupt */
+	swi	r6, r0, 0x20	/* hardware exception */
 
-	addi	r1, r0, CFG_SDRAM_BASE	/* init stack pointer */
+	addi	r6, r0, 0xb808	/* hew b808 opcode brai*/
-	addi	r1, r1, CFG_SDRAM_SIZE	/* set sp to high up */
+	bslli	r6, r6, 16
+	swi	r6, r0, 0x4	/* reset address */
+	swi	r6, r0, 0xC	/* user vector exception */
+	swi	r6, r0, 0x14	/* interrupt */
+	swi	r6, r0, 0x24	/* hardware exception */
 
+#ifdef CFG_RESET_ADDRESS
+	/* reset address */
+	addik	r6, r0, CFG_RESET_ADDRESS
+	sw	r6, r1, r0
+	lhu	r7, r1, r0
+	shi	r7, r0, 0x2
+	shi	r6, r0, 0x6
+#endif
+
+#ifdef CFG_USR_EXCEP
+	/* user_vector_exception */
+	addik	r6, r0, _exception_handler
+	sw	r6, r1, r0
+	lhu	r7, r1, r0
+	shi	r7, r0, 0xa
+	shi	r6, r0, 0xe
+#endif
+
+#ifdef CFG_INTC_0
+	/* interrupt_handler */
+	addik	r6, r0, _interrupt_handler
+	sw	r6, r1, r0
+	lhu	r7, r1, r0
+	shi	r7, r0, 0x12
+	shi	r6, r0, 0x16
+#endif
+
+	/* hardware exception */
+	addik	r6, r0, _hw_exception_handler
+	sw	r6, r1, r0
+	lhu	r7, r1, r0
+	shi	r7, r0, 0x22
+	shi	r6, r0, 0x26
+
+	/* enable instruction and data cache */
+	mfs	r12, rmsr
+	ori	r12, r12, 0xa0
+	mts	rmsr, r12
+
+	/* jumping to board_init */
 	brai	board_init
-
 1:	bri	1b

lib_microblaze/board.c

@@ -1,6 +1,8 @@
 /*
+ * (C) Copyright 2007 Michal Simek
  * (C) Copyright 2004 Atmark Techno, Inc.
  *
+ * Michal  SIMEK <monstr@monstr.eu>
  * Yasushi SHOJI <yashi@atmark-techno.com>
  *
  * See file CREDITS for list of people who contributed to this
@@ -13,7 +15,7 @@
  *
  * 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
+ * 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
@@ -30,8 +32,18 @@
 
 DECLARE_GLOBAL_DATA_PTR;
 
-const char version_string[] =
+const char version_string[] = U_BOOT_VERSION " (" __DATE__ " - " __TIME__ ")";
-	U_BOOT_VERSION" (" __DATE__ " - " __TIME__ ")";
+
+#ifdef CFG_GPIO_0
+extern int gpio_init (void);
+#endif
+#ifdef CFG_INTC_0
+extern int interrupts_init (void);
+#endif
+#if (CONFIG_COMMANDS & CFG_CMD_NET)
+extern int eth_init (bd_t * bis);
+extern int getenv_IPaddr (char *);
+#endif
 
 /*
  * Begin and End of memory area for malloc(), and current "brk"
@@ -40,6 +52,18 @@ static ulong mem_malloc_start;
 static ulong mem_malloc_end;
 static ulong mem_malloc_brk;
 
+/*
+ * The Malloc area is immediately below the monitor copy in DRAM
+ * aka CFG_MONITOR_BASE - Note there is no need for reloc_off
+ * as our monitory code is run from SDRAM
+ */
+static void mem_malloc_init (void)
+{
+	mem_malloc_end = CFG_MONITOR_BASE + CFG_MONITOR_LEN;
+	mem_malloc_start = CFG_MONITOR_BASE;
+	mem_malloc_brk = mem_malloc_start;
+	memset ((void *)mem_malloc_start, 0, mem_malloc_end - mem_malloc_start);
+}
 
 void *sbrk (ptrdiff_t increment)
 {
@@ -50,7 +74,7 @@ void *sbrk (ptrdiff_t increment)
 		return (NULL);
 	}
 	mem_malloc_brk = new;
-	return ((void *) old);
+	return ((void *)old);
 }
 
 /*
@@ -68,24 +92,36 @@ void *sbrk (ptrdiff_t increment)
 typedef int (init_fnc_t) (void);
 
 init_fnc_t *init_sequence[] = {
-	serial_init,		/* serial communications setup */
+	env_init,
+	serial_init,
+#ifdef CFG_GPIO_0
+	gpio_init,
+#endif
+#ifdef CFG_INTC_0
+	interrupts_init,
+#endif
 	NULL,
 };
 
-void board_init(void)
+void board_init (void)
 {
 	bd_t *bd;
 	init_fnc_t **init_fnc_ptr;
-
+	gd = (gd_t *) CFG_GBL_DATA_OFFSET;
-	/* Pointer is writable since we allocated a register for it. */
+#if (CONFIG_COMMANDS & CFG_CMD_FLASH)
-	gd = (gd_t *)CFG_GBL_DATA_OFFSET;
+	ulong flash_size = 0;
-	memset((void *)gd, 0, CFG_GBL_DATA_SIZE);
+#endif
-
+	asm ("nop");	/* FIXME gd is not initialize - wait */
-	gd->bd = (bd_t *)(gd+1);	/* At end of global data */
+	memset ((void *)gd, 0, CFG_GBL_DATA_SIZE);
+	gd->bd = (bd_t *) (gd + 1);	/* At end of global data */
 	gd->baudrate = CONFIG_BAUDRATE;
-
 	bd = gd->bd;
 	bd->bi_baudrate = CONFIG_BAUDRATE;
+	bd->bi_memstart = CFG_SDRAM_BASE;
+	bd->bi_memsize = CFG_SDRAM_SIZE;
+
+	/* Initialise malloc() area */
+	mem_malloc_init ();
 
 	for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
 		WATCHDOG_RESET ();
@@ -94,6 +130,37 @@ void board_init(void)
 		}
 	}
 
+#if (CONFIG_COMMANDS & CFG_CMD_FLASH)
+	bd->bi_flashstart = CFG_FLASH_BASE;
+	if (0 < (flash_size = flash_init ())) {
+		bd->bi_flashsize = flash_size;
+		bd->bi_flashoffset = CFG_FLASH_BASE + flash_size;
+	} else {
+		puts ("Flash init FAILED");
+		bd->bi_flashstart = 0;
+		bd->bi_flashsize = 0;
+		bd->bi_flashoffset = 0;
+	}
+#endif
+
+#if (CONFIG_COMMANDS & CFG_CMD_NET)
+	char *s, *e;
+	int i;
+	/* board MAC address */
+	s = getenv ("ethaddr");
+	for (i = 0; i < 6; ++i) {
+		bd->bi_enetaddr[i] = s ? simple_strtoul (s, &e, 16) : 0;
+		if (s)
+			s = (*e) ? e + 1 : e;
+	}
+	/* IP Address */
+	bd->bi_ip_addr = getenv_IPaddr ("ipaddr");
+	eth_init (bd);
+#endif
+
+	/* relocate environment function pointers etc. */
+	env_relocate ();
+
 	/* main_loop */
 	for (;;) {
 		WATCHDOG_RESET ();
@@ -104,5 +171,5 @@ void board_init(void)
 void hang (void)
 {
 	puts ("### ERROR ### Please RESET the board ###\n");
-	for (;;);
+	for (;;) ;
 }

lib_microblaze/microblaze_linux.c

@@ -1,6 +1,8 @@
 /*
+ * (C) Copyright 2007 Michal Simek
  * (C) Copyright 2004 Atmark Techno, Inc.
  *
+ * Michal  SIMEK <monstr@monstr.eu>
  * Yasushi SHOJI <yashi@atmark-techno.com>
  *
  * See file CREDITS for list of people who contributed to this
@@ -13,7 +15,7 @@
  *
  * 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
+ * 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
@@ -24,8 +26,146 @@
 
 #include <common.h>
 #include <command.h>
+#include <image.h>
+#include <zlib.h>
+#include <asm/byteorder.h>
 
-void do_bootm_linux(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
+DECLARE_GLOBAL_DATA_PTR;
-		ulong addr, ulong *len_ptr, int   verify)
+
+#ifdef CONFIG_SHOW_BOOT_PROGRESS
+# include <status_led.h>
+# define SHOW_BOOT_PROGRESS(arg)        show_boot_progress(arg)
+#else
+# define SHOW_BOOT_PROGRESS(arg)
+#endif
+
+extern image_header_t header;	/* from cmd_bootm.c */
+/*cmd_boot.c*/
+extern int do_reset (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[]);
+
+void do_bootm_linux (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[],
+		     ulong addr, ulong * len_ptr, int verify)
 {
+	ulong len = 0, checksum;
+	ulong initrd_start, initrd_end;
+	ulong data;
+	/* First parameter is mapped to $r5 for kernel boot args */
+	void (*theKernel) (char *);
+	image_header_t *hdr = &header;
+	char *commandline = getenv ("bootargs");
+	int i;
+
+	theKernel = (void (*)(char *))ntohl (hdr->ih_ep);
+
+	/* Check if there is an initrd image */
+	if (argc >= 3) {
+		SHOW_BOOT_PROGRESS (9);
+
+		addr = simple_strtoul (argv[2], NULL, 16);
+
+		printf ("## Loading Ramdisk Image at %08lx ...\n", addr);
+
+		/* Copy header so we can blank CRC field for re-calculation */
+		memcpy (&header, (char *)addr, sizeof (image_header_t));
+
+		if (ntohl (hdr->ih_magic) != IH_MAGIC) {
+			printf ("Bad Magic Number\n");
+			SHOW_BOOT_PROGRESS (-10);
+			do_reset (cmdtp, flag, argc, argv);
+		}
+
+		data = (ulong) & header;
+		len = sizeof (image_header_t);
+
+		checksum = ntohl (hdr->ih_hcrc);
+		hdr->ih_hcrc = 0;
+
+		if (crc32 (0, (char *)data, len) != checksum) {
+			printf ("Bad Header Checksum\n");
+			SHOW_BOOT_PROGRESS (-11);
+			do_reset (cmdtp, flag, argc, argv);
+		}
+
+		SHOW_BOOT_PROGRESS (10);
+
+		print_image_hdr (hdr);
+
+		data = addr + sizeof (image_header_t);
+		len = ntohl (hdr->ih_size);
+
+		if (verify) {
+			ulong csum = 0;
+
+			printf ("   Verifying Checksum ... ");
+			csum = crc32 (0, (char *)data, len);
+			if (csum != ntohl (hdr->ih_dcrc)) {
+				printf ("Bad Data CRC\n");
+				SHOW_BOOT_PROGRESS (-12);
+				do_reset (cmdtp, flag, argc, argv);
+			}
+			printf ("OK\n");
+		}
+
+		SHOW_BOOT_PROGRESS (11);
+
+		if ((hdr->ih_os != IH_OS_LINUX) ||
+		    (hdr->ih_arch != IH_CPU_MICROBLAZE) ||
+		    (hdr->ih_type != IH_TYPE_RAMDISK)) {
+			printf ("No Linux Microblaze Ramdisk Image\n");
+			SHOW_BOOT_PROGRESS (-13);
+			do_reset (cmdtp, flag, argc, argv);
+		}
+
+		/*
+		 * Now check if we have a multifile image
+		 */
+	} else if ((hdr->ih_type == IH_TYPE_MULTI) && (len_ptr[1])) {
+		ulong tail = ntohl (len_ptr[0]) % 4;
+
+		SHOW_BOOT_PROGRESS (13);
+
+		/* skip kernel length and terminator */
+		data = (ulong) (&len_ptr[2]);
+		/* skip any additional image length fields */
+		for (i = 1; len_ptr[i]; ++i)
+			data += 4;
+		/* add kernel length, and align */
+		data += ntohl (len_ptr[0]);
+		if (tail) {
+			data += 4 - tail;
+		}
+
+		len = ntohl (len_ptr[1]);
+
+	} else {
+		/*
+		 * no initrd image
+		 */
+		SHOW_BOOT_PROGRESS (14);
+
+		data = 0;
+	}
+
+#ifdef  DEBUG
+	if (!data) {
+		printf ("No initrd\n");
+	}
+#endif
+
+	if (data) {
+		initrd_start = data;
+		initrd_end = initrd_start + len;
+	} else {
+		initrd_start = 0;
+		initrd_end = 0;
+	}
+
+	SHOW_BOOT_PROGRESS (15);
+
+#ifdef DEBUG
+	printf ("## Transferring control to Linux (at address %08lx) ...\n",
+		(ulong) theKernel);
+#endif
+
+	theKernel (commandline);
 }

lib_microblaze/time.c

@@ -1,6 +1,8 @@
 /*
+ * (C) Copyright 2007 Michal Simek
  * (C) Copyright 2004 Atmark Techno, Inc.
  *
+ * Michal  SIMEK <monstr@monstr.eu>
  * Yasushi SHOJI <yashi@atmark-techno.com>
  *
  * See file CREDITS for list of people who contributed to this
@@ -22,6 +24,11 @@
  * MA 02111-1307 USA
  */
 
-void udelay(unsigned long usec)
+#include <common.h>
+
+void udelay (unsigned long usec)
 {
+	int i;
+	i = get_timer (0);
+	while ((get_timer (0) - i) < (usec / 1000)) ;
 }

microblaze_config.mk

@@ -22,7 +22,7 @@
 # MA 02111-1307 USA
 #
 
-PLATFORM_CPPFLAGS += -ffixed-r31
+PLATFORM_CPPFLAGS += -ffixed-r31 -D__microblaze__
 
 ifdef CONFIG_MICROBLAZE_HARD_MULT
 PLATFORM_CPPFLAGS += -mno-xl-soft-mul