From: wdenk <wdenk>
Date: Sun, 9 Jan 2005 22:28:56 +0000 (+0000)
Subject: * Patch by Leif Lindholm, 23 Sep 2004:
X-Git-Tag: LABEL_2005_01_31_2245~9
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=ff36fd8591776405eeb3a086ba1136bf1ece2ffb;p=kernel%2Fu-boot.git

* Patch by Leif Lindholm, 23 Sep 2004:
  add support for the AMD db1550 board

* Patch by Travis Sawyer, 15 Sep 2004:
  Add CONFIG_SERIAL_MULTI support for ppc4xx,
  update README.serial_multi
---

diff --git a/CHANGELOG b/CHANGELOG
index b15aaf0..36e8c2e 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -2,6 +2,13 @@
 Changes for U-Boot 1.1.3:
 ======================================================================
 
+* Patch by Leif Lindholm, 23 Sep 2004:
+  add support for the AMD db1550 board
+
+* Patch by Travis Sawyer, 15 Sep 2004:
+  Add CONFIG_SERIAL_MULTI support for ppc4xx,
+  update README.serial_multi
+
 * Patches by David Snowdon, 07 Sep 2004:
   - add u-boot.hex target in the top level Makefile
   - add support for the UNSW/NICTA PLEB 2 board (pleb2)
diff --git a/CREDITS b/CREDITS
index d688beb..6152b71 100644
--- a/CREDITS
+++ b/CREDITS
@@ -253,6 +253,10 @@ E: team@leox.org
 D: Support for LEOX boards, DS164x RTC
 W: http://www.leox.org
 
+N: Leif Lindholm
+E: leif.lindholm@i3micro.com
+D: Support for AMD dbau1550 board.
+
 N: Stephan Linz
 E: linz@li-pro.net
 D: Support for Nios Stratix Development Kit (DK-1S10)
diff --git a/MAKEALL b/MAKEALL
index 77d9487..276cbbd 100644
--- a/MAKEALL
+++ b/MAKEALL
@@ -180,9 +180,9 @@ LIST_mips4kc="incaip"
 
 LIST_mips5kc="purple"
 
-LIST_au1x00="dbau1000 dbau1100 dbau1500"
+LIST_au1xx0="dbau1000 dbau1100 dbau1500 dbau1550 dbau1550_el"
 
-LIST_mips="${LIST_mips4kc} ${LIST_mips5kc} ${LIST_au1x00}"
+LIST_mips="${LIST_mips4kc} ${LIST_mips5kc} ${LIST_au1xx0}"
 
 #########################################################################
 ## i386 Systems
diff --git a/Makefile b/Makefile
index df4b3ed..cda8754 100644
--- a/Makefile
+++ b/Makefile
@@ -1467,6 +1467,16 @@ dbau1500_config		: 	unconfig
 	@echo "#define CONFIG_DBAU1500 1" >>include/config.h
 	@./mkconfig -a dbau1x00 mips mips dbau1x00
 
+dbau1550_config		:	unconfig
+	@ >include/config.h
+	@echo "#define CONFIG_DBAU1550 1" >>include/config.h
+	@./mkconfig -a dbau1x00 mips mips dbau1x00
+
+dbau1550_el_config	:	unconfig
+	@ >include/config.h
+	@echo "#define CONFIG_DBAU1550 1" >>include/config.h
+	@./mkconfig -a dbau1x00 mips mips dbau1x00 "" little
+
 #########################################################################
 ## MIPS64 5Kc
 #########################################################################
diff --git a/board/dbau1x00/dbau1x00.c b/board/dbau1x00/dbau1x00.c
index df1c15c..1f7253e 100644
--- a/board/dbau1x00/dbau1x00.c
+++ b/board/dbau1x00/dbau1x00.c
@@ -30,7 +30,7 @@ long int initdram(int board_type)
 {
 	/* Sdram is setup by assembler code */
 	/* If memory could be changed, we should return the true value here */
-	return 64*1024*1024;
+	return MEM_SIZE*1024*1024;
 }
 
 #define BCSR_PCMCIA_PC0DRVEN		0x0010
@@ -42,8 +42,8 @@ void write_one_tlb( int index, u32 pagemask, u32 hi, u32 low0, u32 low1 );
 int checkboard (void)
 {
 	u16 status;
-	volatile u32 *pcmcia_bcsr = (u32*)(DB1000_BCSR_ADDR+0x10);
-	volatile u32 *phy = (u32*)(DB1000_BCSR_ADDR+0xC);
+	volatile u32 *pcmcia_bcsr = (u32*)(DB1XX0_BCSR_ADDR+0x10);
+	volatile u32 *phy = (u32*)(DB1XX0_BCSR_ADDR+0xC);
 	volatile u32 *sys_counter = (volatile u32*)SYS_COUNTER_CNTRL;
 	u32 proc_id;
 
@@ -67,6 +67,11 @@ int checkboard (void)
 		printf ("CPU: Au1100, id: 0x%02x, rev: 0x%02x\n",
 			(proc_id >> 8) & 0xFF, proc_id & 0xFF);
 		break;
+	case 3:
+		puts ("Board: DbAu1550\n");
+		printf ("CPU: Au1550, id: 0x%02x, rev: 0x%02x\n",
+			(proc_id >> 8) & 0xFF, proc_id & 0xFF);
+		break;
 	default:
 		printf ("Unsupported cpu %d, proc_id=0x%x\n", proc_id >> 24, proc_id);
 	}
diff --git a/board/dbau1x00/memsetup.S b/board/dbau1x00/memsetup.S
index d2a17a0..c96d8a5 100644
--- a/board/dbau1x00/memsetup.S
+++ b/board/dbau1x00/memsetup.S
@@ -9,7 +9,8 @@
 #define AU1500_SYS_ADDR		0xB1900000
 #define sys_endian		0x0038
 #define CP0_Config0		$16
-#define MEM_1MS			((396000000/1000000) * 1000)
+#define CPU_SCALE		((CFG_MHZ) / 12) /* CPU clock is a multiple of 12 MHz */
+#define MEM_1MS			((CFG_MHZ) * 1000)
 
 	.text
 	.set noreorder
@@ -23,6 +24,19 @@ memsetup:
 	 * Switch S1.1 Off(bit7 reads 1) is Little Endian
 	 * Switch S1.1 On (bit7 reads 0) is Big Endian
 	 */
+#ifdef CONFIG_DBAU1550
+	li	t0, MEM_STCFG2
+	li	t1, 0x00000040
+	sw	t1, 0(t0)
+
+	li	t0, MEM_STTIME2
+	li	t1, 0x22080a20
+	sw	t1, 0(t0)
+
+	li	t0, MEM_STADDR2
+	li	t1, 0x10c03f00
+	sw	t1, 0(t0)
+#else
 	li	t0, MEM_STCFG1
 	li	t1, 0x00000080
 	sw	t1, 0(t0)
@@ -34,9 +48,10 @@ memsetup:
 	li	t0, MEM_STADDR1
 	li	t1, 0x10c03f00
 	sw	t1, 0(t0)
+#endif
 
-	li	t0, 0xAE000008
-	lw	t1,0(t0)
+	li	t0, DB1XX0_BCSR_ADDR
+	lw	t1,8(t0)
 	andi	t1,t1,0x80
 	beq	zero,t1,big_endian
 	nop
@@ -98,10 +113,82 @@ big_endian:
 	mtc0	zero, CP0_WIRED
 	nop
 
+#ifdef CONFIG_DBAU1550
+	/* No workaround if running from ram */
+	lui	t0, 0xffc0
+	lui	t3, 0xbfc0
+	and	t1, ra, t0
+	bne	t1, t3, noCacheJump
+	nop
+
+	/*** From AMD YAMON ***/
+	/*
+	 * Step 8) Initialize the caches
+	 */
+	li		t0, (16*1024)
+	li		t1, 32
+	li		t2, 0x80000000
+	addu	t3, t0, t2
+cacheloop:
+	cache	0, 0(t2)
+	cache	1, 0(t2)
+	addu	t2, t1
+	bne		t2, t3, cacheloop
+	nop
+
+	/* Save return address */
+	move		t3, ra
+
+	/* Run from cacheable space now */
+	bal		cachehere
+	nop
+cachehere:
+	li		t1, ~0x20000000 /* convert to KSEG0 */
+	and		t0, ra, t1
+	addi	t0, 5*4			/* 5 insns beyond cachehere */
+	jr		t0
+	nop
+
+	/* Restore return address */
+	move		ra, t3
+
+	/*
+	 * Step 9) Initialize the TLB
+	 */
+	li		t0, 0			# index value
+	li		t1, 0x00000000		# entryhi value
+	li		t2, 32			# 32 entries
+
+tlbloop:
+	/* Probe TLB for matching EntryHi */
+	mtc0	t1, CP0_ENTRYHI
+	tlbp
+	nop
+
+	/* Examine Index[P], 1=no matching entry */
+	mfc0	t3, CP0_INDEX
+	li	t4, 0x80000000
+	and	t3, t4, t3
+	addiu	t1, t1, 1		# increment t1 (asid)
+	beq	zero, t3, tlbloop
+	nop
+
+	/* Initialize the TLB entry */
+	mtc0	t0, CP0_INDEX
+	mtc0	zero, CP0_ENTRYLO0
+	mtc0	zero, CP0_ENTRYLO1
+	mtc0	zero, CP0_PAGEMASK
+	tlbwi
+
+	/* Do it again */
+	addiu	t0, t0, 1
+	bne	t0, t2, tlbloop
+	nop
+
 	/* First setup pll:s to make serial work ok */
 	/* We have a 12 MHz crystal */
 	li	t0, SYS_CPUPLL
-	li	t1, 0x21  /* 396 MHz */
+	li	t1, CPU_SCALE  /* CPU clock */
 	sw	t1, 0(t0)
 	sync
 	nop
@@ -119,19 +206,49 @@ big_endian:
 	sync
 
 	/*  Static memory controller */
+	/* RCE0 - can not change while fetching, do so from icache */
+	move		t2, ra /* Store return address */
+	bal		getAddr
+	nop
 
-	/* RCE0 AMD 29LV640M MirrorBit Flash */
+getAddr:
+	move		t1, ra
+	move		ra, t2 /* Move return addess back */
+
+	cache	0x14,0(t1)
+	cache	0x14,32(t1)
+	/*** /From YAMON ***/
+
+noCacheJump:
+#endif /* CONFIG_DBAU1550 */
+
+#ifdef CONFIG_DBAU1550
+	li	t0, MEM_STTIME0
+	li	t1, 0x040181D7
+	sw	t1, 0(t0)
+
+	/* RCE0 AMD MirrorBit Flash (?) */
 	li	t0, MEM_STCFG0
-	li	t1, 0x00000013
+	li	t1, 0x00000003
 	sw	t1, 0(t0)
 
+	li	t0, MEM_STADDR0
+	li	t1, 0x11803E00
+	sw	t1, 0(t0)
+#else /* CONFIG_DBAU1550 */
 	li	t0, MEM_STTIME0
-	li	t1, 0x040181D7
+	li	t1, 0x00014C0F
+	sw	t1, 0(t0)
+
+	/* RCE0 AMD 29LV640M MirrorBit Flash */
+	li	t0, MEM_STCFG0
+	li	t1, 0x00000013
 	sw	t1, 0(t0)
 
 	li	t0, MEM_STADDR0
 	li	t1, 0x11E03F80
 	sw	t1, 0(t0)
+#endif /* CONFIG_DBAU1550 */
 
 	/* RCE1 CPLD Board Logic */
 	li	t0, MEM_STCFG1
@@ -146,8 +263,21 @@ big_endian:
 	li	t1, 0x10c03f00
 	sw	t1, 0(t0)
 
+#ifdef CONFIG_DBAU1550
 	/* RCE2 CPLD Board Logic */
 	li	t0, MEM_STCFG2
+	li	t1, 0x00000040
+	sw	t1, 0(t0)
+
+	li	t0, MEM_STTIME2
+	li	t1, 0x22080a20
+	sw	t1, 0(t0)
+
+	li	t0, MEM_STADDR2
+	li	t1, 0x10c03f00
+	sw	t1, 0(t0)
+#else
+	li	t0, MEM_STCFG2
 	li	t1, 0x00000000
 	sw	t1, 0(t0)
 
@@ -158,6 +288,7 @@ big_endian:
 	li	t0, MEM_STADDR2
 	li	t1, 0x00000000
 	sw	t1, 0(t0)
+#endif
 
 	/* RCE3 PCMCIA 250ns */
 	li	t0, MEM_STCFG3
@@ -281,6 +412,99 @@ big_endian:
 	bne	t1, zero, 1b
 	nop
 
+#ifdef CONFIG_DBAU1550
+/* SDCS 0,1,2 DDR SDRAM */
+	li	t0, MEM_SDMODE0
+	li	t1, 0x04276221
+	sw	t1, 0(t0)
+
+	li	t0, MEM_SDMODE1
+	li	t1, 0x04276221
+	sw	t1, 0(t0)
+
+	li	t0, MEM_SDMODE2
+	li	t1, 0x04276221
+	sw	t1, 0(t0)
+
+	li	t0, MEM_SDADDR0
+	li	t1, 0xe21003f0
+	sw	t1, 0(t0)
+
+	li	t0, MEM_SDADDR1
+	li	t1, 0xe21043f0
+	sw	t1, 0(t0)
+
+	li	t0, MEM_SDADDR2
+	li	t1, 0xe21083f0
+	sw	t1, 0(t0)
+
+	sync
+
+	li	t0, MEM_SDCONFIGA
+	li	t1, 0x9030060a /* Program refresh - disabled */
+	sw	t1, 0(t0)
+	sync
+
+	li	t0, MEM_SDCONFIGB
+	li	t1, 0x00028000
+	sw	t1, 0(t0)
+	sync
+
+	li	t0, MEM_SDPRECMD /* Precharge all */
+	li	t1, 0
+	sw	t1, 0(t0)
+	sync
+
+	li	t0, MEM_SDWRMD0
+	li	t1, 0x40000000
+	sw	t1, 0(t0)
+	sync
+
+	li	t0, MEM_SDWRMD1
+	li	t1, 0x40000000
+	sw	t1, 0(t0)
+	sync
+
+	li	t0, MEM_SDWRMD2
+	li	t1, 0x40000000
+	sw	t1, 0(t0)
+	sync
+
+	li	t0, MEM_SDWRMD0
+	li	t1, 0x00000063
+	sw	t1, 0(t0)
+	sync
+
+	li	t0, MEM_SDWRMD1
+	li	t1, 0x00000063
+	sw	t1, 0(t0)
+	sync
+
+	li	t0, MEM_SDWRMD2
+	li	t1, 0x00000063
+	sw	t1, 0(t0)
+	sync
+
+	li	t0, MEM_SDPRECMD /* Precharge all */
+	sw	zero, 0(t0)
+	sync
+
+	/* Issue 2 autoref */
+	li	t0, MEM_SDAUTOREF
+	sw	zero, 0(t0)
+	sync
+
+	li	t0, MEM_SDAUTOREF
+	sw	zero, 0(t0)
+	sync
+
+	/* Enable refresh */
+	li	t0, MEM_SDCONFIGA
+	li	t1, 0x9830060a /* Program refresh - enabled */
+	sw	t1, 0(t0)
+	sync
+
+#else /* CONFIG_DBAU1550 */
 /* SDCS 0,1 SDRAM */
 	li	t0, MEM_SDMODE0
 	li	t1, 0x005522AA
@@ -339,6 +563,7 @@ big_endian:
 	sw	t1, 0(t0)
 	sync
 
+#endif /* CONFIG_DBAU1550 */
 	/* wait 1mS after setup */
 	li	t1, MEM_1MS
 1:	add	t1, -1
diff --git a/common/serial.c b/common/serial.c
index 4f50911..22d8fd0 100644
--- a/common/serial.c
+++ b/common/serial.c
@@ -38,6 +38,9 @@ struct serial_device *default_serial_console (void)
 #elif defined(CONFIG_8xx_CONS_SCC1) || defined(CONFIG_8xx_CONS_SCC2) \
    || defined(CONFIG_8xx_CONS_SCC3) || defined(CONFIG_8xx_CONS_SCC4)
 	return &serial_scc_device;
+#elif defined(CONFIG_405GP) || defined(CONFIG_405CR) || defined(CONFIG_440) \
+   || defined(CONFIG_405EP)
+	return &serial0_device;
 #else
 #error No default console
 #endif
@@ -71,6 +74,12 @@ void serial_initialize (void)
 	serial_register (&serial_scc_device);
 #endif
 
+#if defined(CONFIG_405GP) || defined(CONFIG_405CR) || defined(CONFIG_440) \
+ || defined(CONFIG_405EP)
+	serial_register(&serial0_device);
+	serial_register(&serial1_device);
+#endif
+
 	serial_assign (default_serial_console ()->name);
 }
 
diff --git a/cpu/mips/au1x00_eth.c b/cpu/mips/au1x00_eth.c
index 4f68a9b..b8219bf 100644
--- a/cpu/mips/au1x00_eth.c
+++ b/cpu/mips/au1x00_eth.c
@@ -46,10 +46,15 @@
 #define ETH0_BASE AU1500_ETH0_BASE
 #define MAC0_ENABLE AU1500_MAC0_ENABLE
 #else
+#ifdef CONFIG_AU1550
+#define ETH0_BASE AU1550_ETH0_BASE
+#define MAC0_ENABLE AU1550_MAC0_ENABLE
+#else
 #error "No valid cpu set"
 #endif
 #endif
 #endif
+#endif
 
 #include <common.h>
 #include <malloc.h>
diff --git a/cpu/mips/au1x00_serial.c b/cpu/mips/au1x00_serial.c
index 99e2489..ac75da5 100644
--- a/cpu/mips/au1x00_serial.c
+++ b/cpu/mips/au1x00_serial.c
@@ -71,8 +71,8 @@ void serial_setbrg (void)
 	volatile u32 *uart_clk = (volatile u32*)(UART0_ADDR+UART_CLK);
 	volatile u32 *uart_lcr = (volatile u32*)(UART0_ADDR+UART_LCR);
 
-	/* Set baudrate to 115200 */
-	*uart_clk = 0x36;
+	/* Set baudrate - FIXME for bus speeds != CPU/2 */
+	*uart_clk = ((CFG_HZ/(CONFIG_BAUDRATE * 64)));
 
 	/* Set parity, stop bits and word length to 8N1 */
 	*uart_lcr = UART_LCR_WLEN8;
diff --git a/cpu/ppc4xx/serial.c b/cpu/ppc4xx/serial.c
index 41402cc..4abd3fc 100644
--- a/cpu/ppc4xx/serial.c
+++ b/cpu/ppc4xx/serial.c
@@ -41,13 +41,20 @@
  * LICENSED MATERIAL  -  PROGRAM PROPERTY OF I B M
  */
 /*------------------------------------------------------------------------------- */
-
+/*
+ * Travis Sawyer 15 September 2004
+ *    Added CONFIG_SERIAL_MULTI support
+ */
 #include <common.h>
 #include <commproc.h>
 #include <asm/processor.h>
 #include <watchdog.h>
 #include "vecnum.h"
 
+#ifdef CONFIG_SERIAL_MULTI
+#include <serial.h>
+#endif
+
 #ifdef CONFIG_SERIAL_SOFTWARE_FIFO
 #include <malloc.h>
 #endif
@@ -147,7 +154,6 @@
 #define asyncXOFFchar                 0x13
 #define asyncXONchar                  0x11
 
-
 /*
  * Minimal serial functions needed to use one of the SMC ports
  * as serial console interface.
@@ -177,7 +183,6 @@ int serial_init (void)
 	return (0);
 }
 
-
 void serial_setbrg (void)
 {
 	DECLARE_GLOBAL_DATA_PTR;
@@ -190,7 +195,6 @@ void serial_setbrg (void)
 	out8 (SPU_BASE + spu_BRateDivh, ((br_reg & 0xff00) >> 8)); /* ... */
 }
 
-
 void serial_putc (const char c)
 {
 	if (c == '\n')
@@ -208,7 +212,6 @@ void serial_putc (const char c)
 	}
 }
 
-
 void serial_puts (const char *s)
 {
 	while (*s) {
@@ -216,7 +219,6 @@ void serial_puts (const char *s)
 	}
 }
 
-
 int serial_getc ()
 {
 	unsigned char status = 0;
@@ -240,7 +242,6 @@ int serial_getc ()
 	return (0x000000ff & (int) in8 (asyncRxBufferport1));
 }
 
-
 int serial_tstc ()
 {
 	unsigned char status;
@@ -264,7 +265,6 @@ int serial_tstc ()
 
 #endif	/* CONFIG_IOP480 */
 
-
 /*****************************************************************************/
 #if defined(CONFIG_405GP) || defined(CONFIG_405CR) || defined(CONFIG_440) || defined(CONFIG_405EP)
 
@@ -350,7 +350,6 @@ int serial_tstc ()
 /*#define asyncTxBufferport1      ACTING_UART0_BASE+0x00 */
 /*#define asyncRxBufferport1      ACTING_UART0_BASE+0x00 */
 
-
 #ifdef CONFIG_SERIAL_SOFTWARE_FIFO
 /*-----------------------------------------------------------------------------+
   | Fifo
@@ -364,7 +363,6 @@ typedef struct {
 volatile static serial_buffer_t buf_info;
 #endif
 
-
 #if defined(CONFIG_440) && !defined(CFG_EXT_SERIAL_CLOCK)
 static void serial_divs (int baudrate, unsigned long *pudiv,
 			 unsigned short *pbdiv )
@@ -411,14 +409,17 @@ static void serial_divs (int baudrate, unsigned long *pudiv,
 }
 #endif /* defined(CONFIG_440) && !defined(CFG_EXT_SERIAL_CLK */
 
-
 /*
  * Minimal serial functions needed to use one of the SMC ports
  * as serial console interface.
  */
 
 #if defined(CONFIG_440)
-int serial_init (void)
+#if defined(CONFIG_SERIAL_MULTI)
+int serial_init_dev (unsigned long dev_base)
+#else
+int serial_init(void)
+#endif
 {
 	DECLARE_GLOBAL_DATA_PTR;
 
@@ -431,8 +432,18 @@ int serial_init (void)
 #endif
 
 #if defined(CONFIG_440_GX)
+#if defined(CONFIG_SERIAL_MULTI)
+	if (UART0_BASE == dev_base) {
+		mfsdr(UART0_SDR,reg);
+		reg &= ~CR0_MASK;
+	} else {
+		mfsdr(UART1_SDR,reg);
+		reg &= ~CR0_MASK;
+	}
+#else
 	mfsdr(UART0_SDR,reg);
 	reg &= ~CR0_MASK;
+#endif
 #else
 	reg = mfdcr(cntrl0) & ~CR0_MASK;
 #endif /* CONFIG_440_GX */
@@ -451,11 +462,32 @@ int serial_init (void)
 
 #if defined(CONFIG_440_GX)
 	reg |= udiv << CR0_UDIV_POS;	/* set the UART divisor */
+#if defined(CONFIG_SERIAL_MULTI)
+	if (UART0_BASE == dev_base) {
+		mtsdr (UART0_SDR,reg);
+	} else {
+		mtsdr (UART1_SDR,reg);
+	}
+#else
 	mtsdr (UART0_SDR,reg);
+#endif
 #else
 	reg |= (udiv - 1) << CR0_UDIV_POS;	/* set the UART divisor */
 	mtdcr (cntrl0, reg);
 #endif
+
+#if defined(CONFIG_SERIAL_MULTI)
+	out8 (dev_base + UART_LCR, 0x80);	/* set DLAB bit */
+	out8 (dev_base + UART_DLL, bdiv);	/* set baudrate divisor */
+	out8 (dev_base + UART_DLM, bdiv >> 8);/* set baudrate divisor */
+	out8 (dev_base + UART_LCR, 0x03);	/* clear DLAB; set 8 bits, no parity */
+	out8 (dev_base + UART_FCR, 0x00);	/* disable FIFO */
+	out8 (dev_base + UART_MCR, 0x00);	/* no modem control DTR RTS */
+	val = in8 (dev_base + UART_LSR);	/* clear line status */
+	val = in8 (dev_base + UART_RBR);	/* read receive buffer */
+	out8 (dev_base + UART_SCR, 0x00);	/* set scratchpad */
+	out8 (dev_base + UART_IER, 0x00);	/* set interrupt enable reg */
+#else
 	out8 (ACTING_UART0_BASE + UART_LCR, 0x80);	/* set DLAB bit */
 	out8 (ACTING_UART0_BASE + UART_DLL, bdiv);	/* set baudrate divisor */
 	out8 (ACTING_UART0_BASE + UART_DLM, bdiv >> 8);/* set baudrate divisor */
@@ -466,13 +498,17 @@ int serial_init (void)
 	val = in8 (ACTING_UART0_BASE + UART_RBR);	/* read receive buffer */
 	out8 (ACTING_UART0_BASE + UART_SCR, 0x00);	/* set scratchpad */
 	out8 (ACTING_UART0_BASE + UART_IER, 0x00);	/* set interrupt enable reg */
-
+#endif
 	return (0);
 }
 
 #else /* !defined(CONFIG_440) */
 
+#if defined(CONFIG_SERIAL_MULTI)
+int serial_init_dev (unsigned long dev_base)
+#else
 int serial_init (void)
+#endif
 {
 	DECLARE_GLOBAL_DATA_PTR;
 
@@ -517,6 +553,18 @@ int serial_init (void)
 	tmp = gd->baudrate * udiv * 16;
 	bdiv = (clk + tmp / 2) / tmp;
 
+#if defined(CONFIG_SERIAL_MULTI)
+	out8 (dev_base + UART_LCR, 0x80);	/* set DLAB bit */
+	out8 (dev_base + UART_DLL, bdiv);	/* set baudrate divisor */
+	out8 (dev_base + UART_DLM, bdiv >> 8);/* set baudrate divisor */
+	out8 (dev_base + UART_LCR, 0x03);	/* clear DLAB; set 8 bits, no parity */
+	out8 (dev_base + UART_FCR, 0x00);	/* disable FIFO */
+	out8 (dev_base + UART_MCR, 0x00);	/* no modem control DTR RTS */
+	val = in8 (dev_base + UART_LSR);	/* clear line status */
+	val = in8 (dev_base + UART_RBR);	/* read receive buffer */
+	out8 (dev_base + UART_SCR, 0x00);	/* set scratchpad */
+	out8 (dev_base + UART_IER, 0x00);	/* set interrupt enable reg */
+#else
 	out8 (ACTING_UART0_BASE + UART_LCR, 0x80);	/* set DLAB bit */
 	out8 (ACTING_UART0_BASE + UART_DLL, bdiv);	/* set baudrate divisor */
 	out8 (ACTING_UART0_BASE + UART_DLM, bdiv >> 8);/* set baudrate divisor */
@@ -527,13 +575,17 @@ int serial_init (void)
 	val = in8 (ACTING_UART0_BASE + UART_RBR);	/* read receive buffer */
 	out8 (ACTING_UART0_BASE + UART_SCR, 0x00);	/* set scratchpad */
 	out8 (ACTING_UART0_BASE + UART_IER, 0x00);	/* set interrupt enable reg */
-
+#endif
 	return (0);
 }
 
 #endif /* if defined(CONFIG_440) */
 
+#if defined(CONFIG_SERIAL_MULTI)
+void serial_setbrg_dev (unsigned long dev_base)
+#else
 void serial_setbrg (void)
+#endif
 {
 	DECLARE_GLOBAL_DATA_PTR;
 
@@ -556,39 +608,71 @@ void serial_setbrg (void)
 	tmp = gd->baudrate * udiv * 16;
 	bdiv = (clk + tmp / 2) / tmp;
 
+#if defined(CONFIG_SERIAL_MULTI)
+	out8 (dev_base + UART_LCR, 0x80);	/* set DLAB bit */
+	out8 (dev_base + UART_DLL, bdiv);	/* set baudrate divisor */
+	out8 (dev_base + UART_DLM, bdiv >> 8);/* set baudrate divisor */
+	out8 (dev_base + UART_LCR, 0x03);	/* clear DLAB; set 8 bits, no parity */
+#else
 	out8 (ACTING_UART0_BASE + UART_LCR, 0x80);	/* set DLAB bit */
 	out8 (ACTING_UART0_BASE + UART_DLL, bdiv);	/* set baudrate divisor */
 	out8 (ACTING_UART0_BASE + UART_DLM, bdiv >> 8);/* set baudrate divisor */
 	out8 (ACTING_UART0_BASE + UART_LCR, 0x03);	/* clear DLAB; set 8 bits, no parity */
+#endif
 }
 
-
+#if defined(CONFIG_SERIAL_MULTI)
+void serial_putc_dev (unsigned long dev_base, const char c)
+#else
 void serial_putc (const char c)
+#endif
 {
 	int i;
 
 	if (c == '\n')
+#if defined(CONFIG_SERIAL_MULTI)
+		serial_putc_dev (dev_base, '\r');
+#else
 		serial_putc ('\r');
+#endif
 
 	/* check THRE bit, wait for transmiter available */
 	for (i = 1; i < 3500; i++) {
+#if defined(CONFIG_SERIAL_MULTI)
+		if ((in8 (dev_base + UART_LSR) & 0x20) == 0x20)
+#else
 		if ((in8 (ACTING_UART0_BASE + UART_LSR) & 0x20) == 0x20)
+#endif
 			break;
 		udelay (100);
 	}
+#if defined(CONFIG_SERIAL_MULTI)
+	out8 (dev_base + UART_THR, c);	/* put character out */
+#else
 	out8 (ACTING_UART0_BASE + UART_THR, c);	/* put character out */
+#endif
 }
 
-
+#if defined(CONFIG_SERIAL_MULTI)
+void serial_puts_dev (unsigned long dev_base, const char *s)
+#else
 void serial_puts (const char *s)
+#endif
 {
 	while (*s) {
+#if defined(CONFIG_SERIAL_MULTI)
+		serial_putc_dev (dev_base, *s++);
+#else
 		serial_putc (*s++);
+#endif
 	}
 }
 
-
-int serial_getc ()
+#if defined(CONFIG_SERIAL_MULTI)
+int serial_getc_dev (unsigned long dev_base)
+#else
+int serial_getc (void)
+#endif
 {
 	unsigned char status = 0;
 
@@ -596,7 +680,11 @@ int serial_getc ()
 #if defined(CONFIG_HW_WATCHDOG)
 		WATCHDOG_RESET ();	/* Reset HW Watchdog, if needed */
 #endif	/* CONFIG_HW_WATCHDOG */
+#if defined(CONFIG_SERIAL_MULTI)
+		status = in8 (dev_base + UART_LSR);
+#else
 		status = in8 (ACTING_UART0_BASE + UART_LSR);
+#endif
 		if ((status & asyncLSRDataReady1) != 0x0) {
 			break;
 		}
@@ -604,22 +692,37 @@ int serial_getc ()
 				asyncLSROverrunError1 |
 				asyncLSRParityError1  |
 				asyncLSRBreakInterrupt1 )) != 0) {
+#if defined(CONFIG_SERIAL_MULTI)
+			out8 (dev_base + UART_LSR,
+#else
 			out8 (ACTING_UART0_BASE + UART_LSR,
+#endif
 			      asyncLSRFramingError1 |
 			      asyncLSROverrunError1 |
 			      asyncLSRParityError1  |
 			      asyncLSRBreakInterrupt1);
 		}
 	}
+#if defined(CONFIG_SERIAL_MULTI)
+	return (0x000000ff & (int) in8 (dev_base));
+#else
 	return (0x000000ff & (int) in8 (ACTING_UART0_BASE));
+#endif
 }
 
-
-int serial_tstc ()
+#if defined(CONFIG_SERIAL_MULTI)
+int serial_tstc_dev (unsigned long dev_base)
+#else
+int serial_tstc (void)
+#endif
 {
 	unsigned char status;
 
+#if defined(CONFIG_SERIAL_MULTI)
+	status = in8 (dev_base + UART_LSR);
+#else
 	status = in8 (ACTING_UART0_BASE + UART_LSR);
+#endif
 	if ((status & asyncLSRDataReady1) != 0x0) {
 		return (1);
 	}
@@ -627,7 +730,11 @@ int serial_tstc ()
 			asyncLSROverrunError1 |
 			asyncLSRParityError1  |
 			asyncLSRBreakInterrupt1 )) != 0) {
+#if defined(CONFIG_SERIAL_MULTI)
+		out8 (dev_base + UART_LSR,
+#else
 		out8 (ACTING_UART0_BASE + UART_LSR,
+#endif
 		      asyncLSRFramingError1 |
 		      asyncLSROverrunError1 |
 		      asyncLSRParityError1  |
@@ -636,7 +743,6 @@ int serial_tstc ()
 	return 0;
 }
 
-
 #ifdef CONFIG_SERIAL_SOFTWARE_FIFO
 
 void serial_isr (void *arg)
@@ -651,8 +757,8 @@ void serial_isr (void *arg)
 	} else {
 		space = rx_get - rx_put;
 	}
-	while (serial_tstc ()) {
-		c = serial_getc ();
+	while (serial_tstc_dev (ACTING_UART0_BASE)) {
+		c = serial_getc_dev (ACTING_UART0_BASE);
 		if (space) {
 			buf_info.rx_buffer[rx_put++] = c;
 			space--;
@@ -752,7 +858,6 @@ int serial_buffered_tstc (void)
 
 #endif	/* CONFIG_SERIAL_SOFTWARE_FIFO */
 
-
 #if (CONFIG_COMMANDS & CFG_CMD_KGDB)
 /*
   AS HARNOIS : according to CONFIG_KGDB_SER_INDEX kgdb uses serial port
@@ -788,7 +893,6 @@ void kgdb_serial_init (void)
 	out8 (ACTING_UART1_BASE + UART_IER, 0x00);	/* set interrupt enable reg */
 }
 
-
 void putDebugChar (const char c)
 {
 	if (c == '\n')
@@ -800,7 +904,6 @@ void putDebugChar (const char c)
 	while ((in8 (ACTING_UART1_BASE + UART_LSR) & 0x20) != 0x20);
 }
 
-
 void putDebugStr (const char *s)
 {
 	while (*s) {
@@ -808,7 +911,6 @@ void putDebugStr (const char *s)
 	}
 }
 
-
 int getDebugChar (void)
 {
 	unsigned char status = 0;
@@ -832,7 +934,6 @@ int getDebugChar (void)
 	return (0x000000ff & (int) in8 (ACTING_UART1_BASE));
 }
 
-
 void kgdb_interruptible (int yes)
 {
 	return;
@@ -867,4 +968,87 @@ void kgdb_interruptible (int yes)
 #endif	/* (CONFIG_KGDB_SER_INDEX & 2) */
 #endif	/* CFG_CMD_KGDB */
 
+
+#if defined(CONFIG_SERIAL_MULTI)
+int serial0_init(void)
+{
+	return (serial_init_dev(UART0_BASE));
+}
+
+int serial1_init(void)
+{
+	return (serial_init_dev(UART1_BASE));
+}
+void serial0_setbrg (void)
+{
+	serial_setbrg_dev(UART0_BASE);
+}
+void serial1_setbrg (void)
+{
+	serial_setbrg_dev(UART1_BASE);
+}
+
+void serial0_putc(const char c)
+{
+	serial_putc_dev(UART0_BASE,c);
+}
+
+void serial1_putc(const char c)
+{
+	serial_putc_dev(UART1_BASE, c);
+}
+void serial0_puts(const char *s)
+{
+	serial_puts_dev(UART0_BASE, s);
+}
+
+void serial1_puts(const char *s)
+{
+	serial_puts_dev(UART1_BASE, s);
+}
+
+int serial0_getc(void)
+{
+	return(serial_getc_dev(UART0_BASE));
+}
+
+int serial1_getc(void)
+{
+	return(serial_getc_dev(UART1_BASE));
+}
+int serial0_tstc(void)
+{
+	return (serial_tstc_dev(UART0_BASE));
+}
+
+int serial1_tstc(void)
+{
+	return (serial_tstc_dev(UART1_BASE));
+}
+
+struct serial_device serial0_device =
+{
+	"serial0",
+	"UART0",
+	serial0_init,
+	serial0_setbrg,
+	serial0_getc,
+	serial0_tstc,
+	serial0_putc,
+	serial0_puts,
+};
+
+struct serial_device serial1_device =
+{
+	"serial1",
+	"UART1",
+	serial1_init,
+	serial1_setbrg,
+	serial1_getc,
+	serial1_tstc,
+	serial1_putc,
+	serial1_puts,
+};
+#endif /* CONFIG_SERIAL_MULTI */
+
 #endif	/* CONFIG_405GP || CONFIG_405CR */
diff --git a/doc/README.serial_multi b/doc/README.serial_multi
index 1d73376..a8d48fc 100644
--- a/doc/README.serial_multi
+++ b/doc/README.serial_multi
@@ -2,6 +2,8 @@ The support for multiple serial interfaces as implemented is mainly
 intended to allow for modem dial-in / dial-out while still being able
 to use a serial console on a (different) serial port.
 
+MPC8XX Specific
+===============
 At the moment, the ports must be split on a SMC and a SCC port  on  a
 8xx processor; other configurations are not (yet) supported.
 
@@ -35,3 +37,18 @@ just after switching the console:
 After that press 'enter' at the SCC console. Note that baudrates <38400
 are not allowed on LWMON with watchdog enabled (see CFG_BAUDRATE_TABLE in
 include/configs/lwmon.h).
+
+
+PPC4XX Specific
+===============
+*) The default console is UART0
+
+*) The console can be switched to UART1 by any of the following commands:
+	setenv stdout serial1
+	setenv stderr serial1
+	setenv stdin serial1
+
+*) The console can be switched to UART0 by any of the following commands:
+	setenv stdout serial0
+	setenv stderr serial0
+	setenv stdin serial0
diff --git a/include/asm-mips/au1x00.h b/include/asm-mips/au1x00.h
index 317e6da..4e19dc4 100644
--- a/include/asm-mips/au1x00.h
+++ b/include/asm-mips/au1x00.h
@@ -132,6 +132,27 @@ static __inline__ int au_ffs(int x)
 #define CP0_DEBUG		$23
 
 /* SDRAM Controller */
+#ifdef CONFIG_AU1550
+
+#define MEM_SDMODE0                0xB4000800
+#define MEM_SDMODE1                0xB4000808
+#define MEM_SDMODE2                0xB4000810
+
+#define MEM_SDADDR0                0xB4000820
+#define MEM_SDADDR1                0xB4000828
+#define MEM_SDADDR2                0xB4000830
+
+#define MEM_SDCONFIGA              0xB4000840
+#define MEM_SDCONFIGB              0xB4000848
+#define MEM_SDPRECMD               0xB40008c0
+#define MEM_SDAUTOREF              0xB40008c8
+
+#define MEM_SDWRMD0                0xB4000880
+#define MEM_SDWRMD1                0xB4000888
+#define MEM_SDWRMD2                0xB4000890
+
+#else /* CONFIG_AU1550 */
+
 #define MEM_SDMODE0                0xB4000000
 #define MEM_SDMODE1                0xB4000004
 #define MEM_SDMODE2                0xB4000008
@@ -148,6 +169,8 @@ static __inline__ int au_ffs(int x)
 #define MEM_SDWRMD1                0xB4000028
 #define MEM_SDWRMD2                0xB400002C
 
+#endif /* CONFIG_AU1550 */
+
 #define MEM_SDSLEEP                0xB4000030
 #define MEM_SDSMCKE                0xB4000034
 
@@ -474,6 +497,8 @@ static __inline__ int au_ffs(int x)
 #define AU1500_ETH0_BASE	  0xB1500000
 #define AU1500_ETH1_BASE	  0xB1510000
 #define AU1100_ETH0_BASE	  0xB0500000
+#define AU1550_ETH0_BASE	  0xB0500000
+#define AU1550_ETH1_BASE	  0xB0510000
 
 /* 4 byte offsets from AU1000_ETH_BASE */
 #define MAC_CONTROL                     0x0
@@ -523,6 +548,8 @@ static __inline__ int au_ffs(int x)
 #define AU1500_MAC0_ENABLE       0xB1520000
 #define AU1500_MAC1_ENABLE       0xB1520004
 #define AU1100_MAC0_ENABLE       0xB0520000
+#define AU1550_MAC0_ENABLE       0xB0520000
+#define AU1550_MAC1_ENABLE       0xB0520004
 
 #define MAC_EN_CLOCK_ENABLE         (1<<0)
 #define MAC_EN_RESET0               (1<<1)
@@ -979,6 +1006,15 @@ static __inline__ int au_ffs(int x)
 #define AC97C_RS              (1<<1)
 #define AC97C_CE              (1<<0)
 
+#define DB1000_BCSR_ADDR 0xAE000000
+#define DB1550_BCSR_ADDR 0xAF000000
+
+#ifdef CONFIG_DBAU1550
+#define DB1XX0_BCSR_ADDR DB1550_BCSR_ADDR
+#else
+#define DB1XX0_BCSR_ADDR DB1000_BCSR_ADDR
+#endif
+
 #ifdef CONFIG_SOC_AU1500
 /* Au1500 PCI Controller */
 #define Au1500_CFG_BASE           0xB4005000 /* virtual, kseg0 addr */
diff --git a/include/configs/dbau1x00.h b/include/configs/dbau1x00.h
index d78b727..984115a 100644
--- a/include/configs/dbau1x00.h
+++ b/include/configs/dbau1x00.h
@@ -42,10 +42,15 @@
 #ifdef CONFIG_DBAU1500
 #define CONFIG_AU1500		1
 #else
+#ifdef CONFIG_DBAU1550
+/* Cabernet */
+#define CONFIG_AU1550           1
+#else
 #error "No valid board set"
 #endif
 #endif
 #endif
+#endif
 
 #define CONFIG_ETHADDR		DE:AD:BE:EF:01:01    /* Ethernet address */
 
@@ -66,23 +71,34 @@
 	"bootfile=/tftpboot/vmlinux.srec\0"				\
 	"load=tftp 80500000 $(u-boot)\0"				\
 	""
+
+#ifdef CONFIG_DBAU1550
+/* Boot from flash by default, revert to bootp */
+#define CONFIG_BOOTCOMMAND	"bootm 0xbfc20000; bootp; bootm"
+
+#define CONFIG_COMMANDS		((CONFIG_CMD_DFL | CFG_CMD_FLASH | CFG_CMD_LOADB | CFG_CMD_NET) & \
+				 ~(CFG_CMD_ENV | CFG_CMD_FAT | CFG_CMD_FPGA | CFG_CMD_IDE | \
+				   CFG_CMD_MII | CFG_CMD_RUN | CFG_CMD_BDI | CFG_CMD_BEDBUG | \
+				   CFG_CMD_NFS | CFG_CMD_ELF | CFG_CMD_PCMCIA | CFG_CMD_I2C))
+#else /* CONFIG_DBAU1550 */
 /* Boot from Compact flash partition 2 as default */
 #define CONFIG_BOOTCOMMAND	"ide reset;disk 0x81000000 0:2;bootm"
 
-#define CONFIG_COMMANDS		((CONFIG_CMD_DFL | \
- CFG_CMD_IDE | \
- CFG_CMD_DHCP	| \
-				 CFG_CMD_ELF	) & \
- ~(CFG_CMD_ENV | CFG_CMD_FAT | CFG_CMD_FLASH | CFG_CMD_FPGA | \
-   CFG_CMD_MII | CFG_CMD_LOADS | CFG_CMD_RUN | CFG_CMD_LOADB | CFG_CMD_ELF | \
-   CFG_CMD_BDI | CFG_CMD_BEDBUG))
+#define CONFIG_COMMANDS		((CONFIG_CMD_DFL | CFG_CMD_IDE | CFG_CMD_DHCP | CFG_CMD_ELF) & \
+				 ~(CFG_CMD_ENV | CFG_CMD_FAT | CFG_CMD_FLASH | CFG_CMD_FPGA | \
+				   CFG_CMD_MII | CFG_CMD_LOADS | CFG_CMD_RUN | CFG_CMD_LOADB | \
+				   CFG_CMD_ELF | CFG_CMD_BDI | CFG_CMD_BEDBUG))
+#endif /* CONFIG_DBAU1550 */
+
 #include <cmd_confdefs.h>
 
 /*
  * Miscellaneous configurable options
  */
 #define	CFG_LONGHELP				/* undef to save memory      */
-#define	CFG_PROMPT		"DbAu1x00 # "	/* Monitor Command Prompt    */
+
+#define	CFG_PROMPT		"DbAu1xx0 # "	/* Monitor Command Prompt    */
+
 #define	CFG_CBSIZE		256		/* Console I/O Buffer Size   */
 #define	CFG_PBSIZE (CFG_CBSIZE+sizeof(CFG_PROMPT)+16)  /* Print Buffer Size */
 #define	CFG_MAXARGS		16		/* max number of command args*/
@@ -91,7 +107,13 @@
 
 #define CFG_BOOTPARAMS_LEN	128*1024
 
-#define CFG_HZ			396000000      /* FIXME causes overflow in net.c */
+#define CFG_MHZ			396
+
+#if (CFG_MHZ % 12) != 0
+#error "Invalid CPU frequency - must be multiple of 12!"
+#endif
+
+#define CFG_HZ                  (CFG_MHZ * 1000000) /* FIXME causes overflow in net.c */
 
 #define CFG_SDRAM_BASE		0x80000000     /* Cached addr */
 
@@ -103,12 +125,29 @@
 /*-----------------------------------------------------------------------
  * FLASH and environment organization
  */
+#ifdef CONFIG_DBAU1550
+
+#define CFG_MAX_FLASH_BANKS	2	/* max number of memory banks */
+#define CFG_MAX_FLASH_SECT	(512)	/* max number of sectors on one chip */
+
+#define PHYS_FLASH_1		0xb8000000 /* Flash Bank #1 */
+#define PHYS_FLASH_2		0xbc000000 /* Flash Bank #2 */
+
+#define CFG_FLASH_BANKS_LIST {PHYS_FLASH_1, PHYS_FLASH_2}
+
+#else /* CONFIG_DBAU1550 */
+
 #define CFG_MAX_FLASH_BANKS	2	/* max number of memory banks */
 #define CFG_MAX_FLASH_SECT	(128)	/* max number of sectors on one chip */
 
 #define PHYS_FLASH_1		0xbec00000 /* Flash Bank #1 */
 #define PHYS_FLASH_2		0xbfc00000 /* Flash Bank #2 */
 
+#endif /* CONFIG_DBAU1550 */
+
+#define CFG_FLASH_CFI           1
+#define CFG_FLASH_CFI_DRIVER    1
+
 /* The following #defines are needed to get flash environment right */
 #define	CFG_MONITOR_BASE	TEXT_BASE
 #define	CFG_MONITOR_LEN		(192 << 10)
@@ -134,8 +173,15 @@
 
 #define CONFIG_NET_MULTI
 
+#ifdef CONFIG_DBAU1550
+#define MEM_SIZE 192
+#else
+#define MEM_SIZE 64
+#endif
+
 #define CONFIG_MEMSIZE_IN_BYTES
 
+#ifndef CONFIG_DBAU1550
 /*---ATA PCMCIA ------------------------------------*/
 #define CFG_PCMCIA_MEM_SIZE 0x4000000 /* Offset to slot 1 FIXME!!! */
 #define CFG_PCMCIA_MEM_ADDR 0x20000000
@@ -166,6 +212,7 @@
 
 /* Offset for alternate registers       */
 #define CFG_ATA_ALT_OFFSET      0x0100
+#endif /* CONFIG_DBAU1550 */
 
 /*-----------------------------------------------------------------------
  * Cache Configuration
@@ -174,6 +221,4 @@
 #define CFG_ICACHE_SIZE		16384
 #define CFG_CACHELINE_SIZE	32
 
-#define DB1000_BCSR_ADDR 0xAE000000
-
 #endif	/* __CONFIG_H */
diff --git a/include/serial.h b/include/serial.h
index c206540..c8abb72 100644
--- a/include/serial.h
+++ b/include/serial.h
@@ -22,6 +22,13 @@ extern struct serial_device serial_smc_device;
 extern struct serial_device serial_scc_device;
 extern struct serial_device * default_serial_console (void);
 
+#if defined(CONFIG_405GP) || defined(CONFIG_405CR) || defined(CONFIG_440) \
+   || defined(CONFIG_405EP)
+extern struct serial_device serial0_device;
+extern struct serial_device serial1_device;
+#endif
+
+
 extern void serial_initialize(void);
 extern void serial_devices_init(void);
 extern int serial_assign(char * name);