* Patch by Steven Scholz, 10 Oct 2003

- Add support for Altera FPGA ACEX1K

* Patches by Thomas Lange, 09 Oct 2003:
  - Endian swap ATA identity for all big endian CPUs, not just PPC
  - MIPS only: New option CONFIG_MEMSIZE_IN_BYTES for passing memsize
    args to linux
  - add support for dbau1x00 board (MIPS32)

cpu/mips/Makefile

@@ -26,7 +26,8 @@ include $(TOPDIR)/config.mk
 LIB	= lib$(CPU).a
 
 START	= start.o
-OBJS	= interrupts.o cpu.o incaip_clock.o serial.o
+OBJS	= asc_serial.o au1x00_serial.o au1x00_eth.o \
+	  cpu.o interrupts.o incaip_clock.o
 SOBJS	= incaip_wdt.o cache.o
 
 all:	.depend $(START) $(LIB)

cpu/mips/asc_serial.c

@@ -4,6 +4,8 @@
 
 #include <config.h>
 
+#if defined(CONFIG_PURPLE) || defined(CONFIG_INCA_IP)
+
 #ifdef CONFIG_PURPLE
 #define	serial_init	asc_serial_init
 #define	serial_putc	asc_serial_putc
@@ -15,7 +17,7 @@
 
 #include <common.h>
 #include <asm/inca-ip.h>
-#include "serial.h"
+#include "asc_serial.h"
 
 #ifdef CONFIG_PURPLE
 
@@ -366,3 +368,4 @@ int serial_tstc (void)
 
     return res;
 }
+#endif /* CONFIG_PURPLE || CONFIG_INCA_IP */

cpu/mips/au1x00_eth.c

@@ -0,0 +1,216 @@
+/* Only eth0 supported for now
+ *
+ * (C) Copyright 2003
+ * Thomas.Lange@corelatus.se
+ *
+ * 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 <config.h>
+
+#ifdef CONFIG_AU1X00
+
+#if defined(CFG_DISCOVER_PHY) || (CONFIG_COMMANDS & CFG_CMD_MII)
+#error "PHY and MII not supported yet"
+/* We just assume that we are running 100FD for now */
+/* We all use switches, right? ;-) */
+#endif
+
+#ifdef CONFIG_AU1000
+/* Base address differ between cpu:s */
+#define ETH0_BASE AU1000_ETH0_BASE
+#define MAC0_ENABLE AU1000_MAC0_ENABLE
+#else
+#error "Au1100 and Au1500 not supported"
+#endif
+
+#include <common.h>
+#include <malloc.h>
+#include <net.h>
+#include <command.h>
+#include <asm/io.h>
+#include <asm/au1x00.h>
+
+/* Ethernet Transmit and Receive Buffers */
+#define DBUF_LENGTH  1520
+#define PKT_MAXBUF_SIZE		1518
+
+static char txbuf[DBUF_LENGTH];
+
+static int next_tx;
+static int next_rx;
+
+/* 4 rx and 4 tx fifos */
+#define NO_OF_FIFOS 4
+
+typedef struct{
+	u32 status;
+	u32 addr;
+	u32 len; /* Only used for tx */
+	u32 not_used;
+} mac_fifo_t;
+
+mac_fifo_t mac_fifo[NO_OF_FIFOS];
+
+#define MAX_WAIT 1000
+
+static int au1x00_send(struct eth_device* dev, volatile void *packet, int length){
+	volatile mac_fifo_t *fifo_tx =
+		(volatile mac_fifo_t*)(MAC0_TX_DMA_ADDR+MAC_TX_BUFF0_STATUS);
+	int i;
+	int res;
+
+	/* tx fifo should always be idle */
+	fifo_tx[next_tx].len = length;
+	fifo_tx[next_tx].addr = (virt_to_phys(packet))|TX_DMA_ENABLE;
+	au_sync();
+
+	udelay(1);
+	i=0;
+	while(!(fifo_tx[next_tx].addr&TX_T_DONE)){
+		if(i>MAX_WAIT){
+			printf("TX timeout\n");
+			break;
+		}
+		udelay(1);
+		i++;
+	}
+
+	/* Clear done bit */
+	fifo_tx[next_tx].addr = 0;
+	fifo_tx[next_tx].len = 0;
+	au_sync();
+
+	res = fifo_tx[next_tx].status;
+
+	next_tx++;
+	if(next_tx>=NO_OF_FIFOS){
+		next_tx=0;
+	}
+	return(res);
+}
+
+static int au1x00_recv(struct eth_device* dev){
+	volatile mac_fifo_t *fifo_rx =
+		(volatile mac_fifo_t*)(MAC0_RX_DMA_ADDR+MAC_RX_BUFF0_STATUS);
+
+	int length;
+	u32 status;
+
+	for(;;){
+		if(!(fifo_rx[next_rx].addr&RX_T_DONE)){
+			/* Nothing has been received */
+			return(-1);
+		}
+
+		status = fifo_rx[next_rx].status;
+
+		length = status&0x3FFF;
+
+		if(status&RX_ERROR){
+			printf("Rx error 0x%x\n", status);
+		}
+		else{
+			/* Pass the packet up to the protocol layers. */
+			NetReceive(NetRxPackets[next_rx], length - 4);
+		}
+
+		fifo_rx[next_rx].addr = (virt_to_phys(NetRxPackets[next_rx]))|RX_DMA_ENABLE;
+
+		next_rx++;
+		if(next_rx>=NO_OF_FIFOS){
+			next_rx=0;
+		}
+	} /* for */
+
+	return(0); /* Does anyone use this? */
+}
+
+static int au1x00_init(struct eth_device* dev, bd_t * bd){
+
+	volatile u32 *macen = (volatile u32*)MAC0_ENABLE;
+	volatile u32 *mac_ctrl = (volatile u32*)(ETH0_BASE+MAC_CONTROL);
+	volatile u32 *mac_addr_high = (volatile u32*)(ETH0_BASE+MAC_ADDRESS_HIGH);
+	volatile u32 *mac_addr_low = (volatile u32*)(ETH0_BASE+MAC_ADDRESS_LOW);
+	volatile u32 *mac_mcast_high = (volatile u32*)(ETH0_BASE+MAC_MCAST_HIGH);
+	volatile u32 *mac_mcast_low = (volatile u32*)(ETH0_BASE+MAC_MCAST_LOW);
+	volatile mac_fifo_t *fifo_tx =
+		(volatile mac_fifo_t*)(MAC0_TX_DMA_ADDR+MAC_TX_BUFF0_STATUS);
+	volatile mac_fifo_t *fifo_rx =
+		(volatile mac_fifo_t*)(MAC0_RX_DMA_ADDR+MAC_RX_BUFF0_STATUS);
+	int i;
+
+	next_tx = 0;
+	next_rx = 0;
+
+	/* We have to enable clocks before releasing reset */
+	*macen = MAC_EN_CLOCK_ENABLE;
+	udelay(10);
+
+	/* Enable MAC0 */
+	/* We have to release reset before accessing registers */
+	*macen = MAC_EN_CLOCK_ENABLE|MAC_EN_RESET0|
+		MAC_EN_RESET1|MAC_EN_RESET2;
+	udelay(10);
+
+	for(i=0;i<NO_OF_FIFOS;i++){
+		fifo_tx[i].len = 0;
+		fifo_tx[i].addr = virt_to_phys(&txbuf[0]);
+		fifo_rx[i].addr = (virt_to_phys(NetRxPackets[i]))|RX_DMA_ENABLE;
+	}
+
+	/* Put mac addr in little endian */
+#define ea eth_get_dev()->enetaddr
+	*mac_addr_high  =	(ea[5] <<  8) | (ea[4]	    ) ;
+	*mac_addr_low   =	(ea[3] << 24) | (ea[2] << 16) |
+		(ea[1] <<  8) | (ea[0]      ) ;
+#undef ea
+
+	*mac_mcast_low = 0;
+	*mac_mcast_high = 0;
+
+	*mac_ctrl = MAC_BIG_ENDIAN|MAC_FULL_DUPLEX;
+	udelay(1);
+	*mac_ctrl = MAC_BIG_ENDIAN|MAC_FULL_DUPLEX|MAC_RX_ENABLE|MAC_TX_ENABLE;
+
+	return(1);
+}
+
+static void au1x00_halt(struct eth_device* dev){
+}
+
+int au1x00_enet_initialize(bd_t *bis){
+	struct eth_device* dev;
+
+	dev = (struct eth_device*) malloc(sizeof *dev);
+	memset(dev, 0, sizeof *dev);
+
+	sprintf(dev->name, "Au1X00 ETHERNET");
+	dev->iobase = 0;
+	dev->priv   = 0;
+	dev->init   = au1x00_init;
+	dev->halt   = au1x00_halt;
+	dev->send   = au1x00_send;
+	dev->recv   = au1x00_recv;
+
+	eth_register(dev);
+
+	return 1;
+}
+
+#endif /* CONFIG_AU1X00 */

cpu/mips/au1x00_serial.c

@@ -0,0 +1,123 @@
+/*
+ * AU1X00 UART support
+ *
+ * Hardcoded to UART 0 for now
+ * Speed and options also hardcoded to 115200 8N1
+ *
+ *  Copyright (c) 2003	Thomas.Lange@corelatus.se
+ *
+ * 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 <config.h>
+
+#ifdef CONFIG_AU1X00
+
+#include <common.h>
+#include <asm/au1x00.h>
+
+/******************************************************************************
+*
+* serial_init - initialize a channel
+*
+* This routine initializes the number of data bits, parity
+* and set the selected baud rate. Interrupts are disabled.
+* Set the modem control signals if the option is selected.
+*
+* RETURNS: N/A
+*/
+
+int serial_init (void)
+{
+	volatile u32 *uart_fifoctl = (volatile u32*)(UART0_ADDR+UART_FCR);
+	volatile u32 *uart_enable = (volatile u32*)(UART0_ADDR+UART_ENABLE);
+
+	/* Enable clocks first */
+	*uart_enable = UART_EN_CE;
+
+	/* Then release reset */
+	/* Must release reset before setting other regs */
+	*uart_enable = UART_EN_CE|UART_EN_E;
+
+	/* Activate fifos, reset tx and rx */
+	/* Set tx trigger level to 12 */
+	*uart_fifoctl = UART_FCR_ENABLE_FIFO|UART_FCR_CLEAR_RCVR|
+		UART_FCR_CLEAR_XMIT|UART_FCR_T_TRIGGER_12;
+
+	serial_setbrg();
+
+	return 0;
+}
+
+
+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 parity, stop bits and word length to 8N1 */
+	*uart_lcr = UART_LCR_WLEN8;
+}
+
+void serial_putc (const char c)
+{
+	volatile u32 *uart_lsr = (volatile u32*)(UART0_ADDR+UART_LSR);
+	volatile u32 *uart_tx = (volatile u32*)(UART0_ADDR+UART_TX);
+
+	if (c == '\n') serial_putc ('\r');
+
+	/* Wait for fifo to shift out some bytes */
+	while((*uart_lsr&UART_LSR_THRE)==0);
+
+	*uart_tx = (u32)c;
+}
+
+void serial_puts (const char *s)
+{
+	while (*s)
+	{
+		serial_putc (*s++);
+	}
+}
+
+int serial_getc (void)
+{
+	volatile u32 *uart_rx = (volatile u32*)(UART0_ADDR+UART_RX);
+	char c;
+
+	while (!serial_tstc());
+
+	c = (*uart_rx&0xFF);
+	return c;
+}
+
+int serial_tstc (void)
+{
+	volatile u32 *uart_lsr = (volatile u32*)(UART0_ADDR+UART_LSR);
+
+	if(*uart_lsr&UART_LSR_DR){
+		/* Data in rfifo */
+		return(1);
+	}
+	return 0;
+}
+#endif /* CONFIG_SERIAL_AU1X00 */

cpu/mips/cache.S

@@ -250,10 +250,10 @@ dcache_disable:
 * RETURNS: N/A
 *
 */
-#if defined(CONFIG_INCA_IP)
-# define	CACHE_LOCK_SIZE	(CFG_DCACHE_SIZE)
-#elif defined(CONFIG_PURPLE)
+#if defined(CONFIG_PURPLE)
 # define	CACHE_LOCK_SIZE	(CFG_DCACHE_SIZE/2)
+#else
+# define	CACHE_LOCK_SIZE	(CFG_DCACHE_SIZE)
 #endif
 	.globl	mips_cache_lock
 	.ent	mips_cache_lock

cpu/mips/cpu.c

@@ -24,6 +24,7 @@
 #include <common.h>
 #include <command.h>
 #include <asm/inca-ip.h>
+#include <asm/mipsregs.h>
 
 int do_reset(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 {
@@ -42,3 +43,12 @@ void flush_cache (ulong start_addr, ulong size)
 {
 
 }
+
+void write_one_tlb( int index, u32 pagemask, u32 hi, u32 low0, u32 low1 ){
+	write_32bit_cp0_register(CP0_ENTRYLO0, low0);
+	write_32bit_cp0_register(CP0_PAGEMASK, pagemask);
+	write_32bit_cp0_register(CP0_ENTRYLO1, low1);
+	write_32bit_cp0_register(CP0_ENTRYHI, hi);
+	write_32bit_cp0_register(CP0_INDEX, index);
+	tlb_write_indexed();
+}