[PATCH] ppc32: cleanup AMCC PPC40x eval boards to support U-Boot

Cleanup PPC40x eval boards (bubinga, walnut and sycamore) to support U-Boot
as bootloader.  The OpenBIOS bd_info struct is not used in the kernel
anymore (only U-Boot now).

uImage (U-Boot) tested on walnut, sycamore and bubinga
zImage (OpenBIOS) tested on sycamore, bubinga and ebony

Signed-off-by: Stefan Roese <sr@denx.de>
Signed-off-by: Matt Porter <mporter@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

arch/ppc/boot/simple/Makefile

@@ -67,6 +67,12 @@ zimageinitrd-$(CONFIG_BAMBOO)		:= zImage.initrd-TREE
   entrypoint-$(CONFIG_BAMBOO)		:= 0x01000000
      extra.o-$(CONFIG_BAMBOO)		:= pibs.o
 
+      zimage-$(CONFIG_BUBINGA)		:= zImage-TREE
+zimageinitrd-$(CONFIG_BUBINGA)		:= zImage.initrd-TREE
+         end-$(CONFIG_BUBINGA)		:= bubinga
+  entrypoint-$(CONFIG_BUBINGA)		:= 0x01000000
+     extra.o-$(CONFIG_BUBINGA)		:= openbios.o
+
       zimage-$(CONFIG_EBONY)		:= zImage-TREE
 zimageinitrd-$(CONFIG_EBONY)		:= zImage.initrd-TREE
          end-$(CONFIG_EBONY)		:= ebony
@@ -91,6 +97,18 @@ zimageinitrd-$(CONFIG_OCOTEA)		:= zImage.initrd-TREE
   entrypoint-$(CONFIG_OCOTEA)		:= 0x01000000
      extra.o-$(CONFIG_OCOTEA)		:= pibs.o
 
+      zimage-$(CONFIG_SYCAMORE)		:= zImage-TREE
+zimageinitrd-$(CONFIG_SYCAMORE)		:= zImage.initrd-TREE
+         end-$(CONFIG_SYCAMORE)		:= sycamore
+  entrypoint-$(CONFIG_SYCAMORE)		:= 0x01000000
+     extra.o-$(CONFIG_SYCAMORE)		:= openbios.o
+
+      zimage-$(CONFIG_WALNUT)		:= zImage-TREE
+zimageinitrd-$(CONFIG_WALNUT)		:= zImage.initrd-TREE
+         end-$(CONFIG_WALNUT)		:= walnut
+  entrypoint-$(CONFIG_WALNUT)		:= 0x01000000
+     extra.o-$(CONFIG_WALNUT)		:= openbios.o
+
      extra.o-$(CONFIG_EV64260)		:= misc-ev64260.o
          end-$(CONFIG_EV64260)		:= ev64260
    cacheflag-$(CONFIG_EV64260)		:= -include $(clear_L2_L3)
@@ -168,7 +186,8 @@ OBJCOPY_ARGS			:= -O elf32-powerpc
 
 # head.o and relocate.o must be at the start.
 boot-y				:= head.o relocate.o $(extra.o-y) $(misc-y)
-boot-$(CONFIG_40x)		+= embed_config.o
+boot-$(CONFIG_REDWOOD_5)	+= embed_config.o
+boot-$(CONFIG_REDWOOD_6)	+= embed_config.o
 boot-$(CONFIG_8xx)		+= embed_config.o
 boot-$(CONFIG_8260)		+= embed_config.o
 boot-$(CONFIG_BSEIP)		+= iic.o

arch/ppc/boot/simple/misc.c

@@ -23,7 +23,7 @@
 #include <asm/page.h>
 #include <asm/mmu.h>
 #include <asm/bootinfo.h>
-#ifdef CONFIG_44x
+#ifdef CONFIG_4xx
 #include <asm/ibm4xx.h>
 #endif
 #include <asm/reg.h>
@@ -88,6 +88,14 @@ get_mem_size(void)
 	return 0;
 }
 
+#if defined(CONFIG_40x)
+#define PPC4xx_EMAC0_MR0	EMAC0_BASE
+#endif
+
+#if defined(CONFIG_44x) && defined(PPC44x_EMAC0_MR0)
+#define PPC4xx_EMAC0_MR0	PPC44x_EMAC0_MR0
+#endif
+
 struct bi_record *
 decompress_kernel(unsigned long load_addr, int num_words, unsigned long cksum)
 {
@@ -103,13 +111,13 @@ decompress_kernel(unsigned long load_addr, int num_words, unsigned long cksum)
 	com_port = serial_init(0, NULL);
 #endif
 
-#if defined(CONFIG_44x) && defined(PPC44x_EMAC0_MR0)
+#if defined(PPC4xx_EMAC0_MR0)
 	/* Reset MAL */
 	mtdcr(DCRN_MALCR(DCRN_MAL_BASE), MALCR_MMSR);
 	/* Wait for reset */
 	while (mfdcr(DCRN_MALCR(DCRN_MAL_BASE)) & MALCR_MMSR) {};
 	/* Reset EMAC */
-	*(volatile unsigned long *)PPC44x_EMAC0_MR0 = 0x20000000;
+	*(volatile unsigned long *)PPC4xx_EMAC0_MR0 = 0x20000000;
 	__asm__ __volatile__("eieio");
 #endif
 
@@ -164,7 +172,9 @@ decompress_kernel(unsigned long load_addr, int num_words, unsigned long cksum)
 		puts(" "); puthex((unsigned long)(&__ramdisk_end));puts("\n");
 	}
 
+#ifndef CONFIG_40x /* don't overwrite the 40x image located at 0x00400000! */
 	avail_ram = (char *)0x00400000;
+#endif
 	end_avail = (char *)0x00800000;
 	puts("avail ram:     "); puthex((unsigned long)avail_ram); puts(" ");
 	puthex((unsigned long)end_avail); puts("\n");

arch/ppc/boot/simple/openbios.c

@@ -1,19 +1,43 @@
 /*
  * arch/ppc/boot/simple/openbios.c
  *
- * 2005 (c) SYSGO AG - g.jaeger@sysgo.com
+ * Copyright (c) 2005 DENX Software Engineering
+ * Stefan Roese <sr@denx.de>
+ *
+ * Based on original work by
+ *      2005 (c) SYSGO AG - g.jaeger@sysgo.com
+ *
  * This file is licensed under the terms of the GNU General Public
  * License version 2.  This program is licensed "as is" without
  * any warranty of any kind, whether express or implied.
  *
- * Derived from arch/ppc/boot/simple/pibs.c (from MontaVista)
  */
 
 #include <linux/types.h>
 #include <linux/config.h>
 #include <linux/string.h>
 #include <asm/ppcboot.h>
-#include <platforms/4xx/ebony.h>
+#include <asm/ibm4xx.h>
+#include <asm/reg.h>
+#ifdef CONFIG_40x
+#include <asm/io.h>
+#endif
+
+#if defined(CONFIG_BUBINGA)
+#define BOARD_INFO_VECTOR       0xFFF80B50 /* openbios 1.19 moved this vector down  - armin */
+#else
+#define BOARD_INFO_VECTOR	0xFFFE0B50
+#endif
+
+#ifdef CONFIG_40x
+/* Supply a default Ethernet address for those eval boards that don't
+ * ship with one.  This is an address from the MBX board I have, so
+ * it is unlikely you will find it on your network.
+ */
+static	ushort	def_enet_addr[] = { 0x0800, 0x3e26, 0x1559 };
+
+extern unsigned long timebase_period_ns;
+#endif /* CONFIG_40x */
 
 extern unsigned long decompress_kernel(unsigned long load_addr, int num_words,
 				       unsigned long cksum);
@@ -23,15 +47,85 @@ extern unsigned long decompress_kernel(unsigned long load_addr, int num_words,
 bd_t hold_resid_buf __attribute__ ((__section__ (".data.boot")));
 bd_t *hold_residual = &hold_resid_buf;
 
+typedef struct openbios_board_info {
+        unsigned char    bi_s_version[4];       /* Version of this structure */
+        unsigned char    bi_r_version[30];      /* Version of the IBM ROM */
+        unsigned int     bi_memsize;            /* DRAM installed, in bytes */
+#ifdef CONFIG_405EP
+        unsigned char    bi_enetaddr[2][6];     /* Local Ethernet MAC address */
+#else /* CONFIG_405EP */
+        unsigned char    bi_enetaddr[6];        /* Local Ethernet MAC address */
+#endif /* CONFIG_405EP */
+        unsigned char    bi_pci_enetaddr[6];    /* PCI Ethernet MAC address */
+        unsigned int     bi_intfreq;            /* Processor speed, in Hz */
+        unsigned int     bi_busfreq;            /* PLB Bus speed, in Hz */
+        unsigned int     bi_pci_busfreq;        /* PCI Bus speed, in Hz */
+#ifdef CONFIG_405EP
+        unsigned int     bi_opb_busfreq;        /* OPB Bus speed, in Hz */
+        unsigned int     bi_pllouta_freq;       /* PLL OUTA speed, in Hz */
+#endif /* CONFIG_405EP */
+} openbios_bd_t;
+
 void *
 load_kernel(unsigned long load_addr, int num_words, unsigned long cksum,
 		void *ign1, void *ign2)
 {
-	decompress_kernel(load_addr, num_words, cksum);
+#ifdef CONFIG_40x
+	openbios_bd_t *openbios_bd = NULL;
+	openbios_bd_t *(*get_board_info)(void) =
+		(openbios_bd_t *(*)(void))(*(unsigned long *)BOARD_INFO_VECTOR);
+
+	/*
+	 * On 40x platforms we not only need the MAC-addresses, but also the
+	 * clocks and memsize. Now try to get all values using the OpenBIOS
+	 * "get_board_info()" callback.
+	 */
+	if ((openbios_bd = get_board_info()) != NULL) {
+		/*
+		 * Copy bd_info from OpenBIOS struct into U-Boot struct
+		 * used by kernel
+		 */
+	        hold_residual->bi_memsize = openbios_bd->bi_memsize;
+	        hold_residual->bi_intfreq = openbios_bd->bi_intfreq;
+	        hold_residual->bi_busfreq = openbios_bd->bi_busfreq;
+	        hold_residual->bi_pci_busfreq = openbios_bd->bi_pci_busfreq;
+		memcpy(hold_residual->bi_pci_enetaddr, openbios_bd->bi_pci_enetaddr, 6);
+#ifdef CONFIG_405EP
+		memcpy(hold_residual->bi_enetaddr, openbios_bd->bi_enetaddr[0], 6);
+		memcpy(hold_residual->bi_enet1addr, openbios_bd->bi_enetaddr[1], 6);
+	        hold_residual->bi_opbfreq = openbios_bd->bi_opb_busfreq;
+	        hold_residual->bi_procfreq = openbios_bd->bi_pllouta_freq;
+#else /* CONFIG_405EP */
+		memcpy(hold_residual->bi_enetaddr, openbios_bd->bi_enetaddr, 6);
+#endif /* CONFIG_405EP */
+	} else {
+		/* Hmmm...better try to stuff some defaults.
+		 */
+		hold_residual->bi_memsize = 16 * 1024 * 1024;
+		hold_residual->bi_intfreq = 200000000;
+		hold_residual->bi_busfreq = 100000000;
+		hold_residual->bi_pci_busfreq = 66666666;
+
+		/*
+		 * Only supply one mac-address in this fallback
+		 */
+		memcpy(hold_residual->bi_enetaddr, (void *)def_enet_addr, 6);
+#ifdef CONFIG_405EP
+	        hold_residual->bi_opbfreq = 50000000;
+	        hold_residual->bi_procfreq = 200000000;
+#endif /* CONFIG_405EP */
+	}
 
+	timebase_period_ns = 1000000000 / hold_residual->bi_intfreq;
+#endif /* CONFIG_40x */
+
+#ifdef CONFIG_440GP
 	/* simply copy the MAC addresses */
-	memcpy(hold_residual->bi_enetaddr,  (char *)EBONY_OPENBIOS_MAC_BASE, 6);
-	memcpy(hold_residual->bi_enet1addr, (char *)(EBONY_OPENBIOS_MAC_BASE+EBONY_OPENBIOS_MAC_OFFSET), 6);
+	memcpy(hold_residual->bi_enetaddr,  (char *)OPENBIOS_MAC_BASE, 6);
+	memcpy(hold_residual->bi_enet1addr, (char *)(OPENBIOS_MAC_BASE+OPENBIOS_MAC_OFFSET), 6);
+#endif /* CONFIG_440GP */
+
+	decompress_kernel(load_addr, num_words, cksum);
 
 	return (void *)hold_residual;
 }

arch/ppc/platforms/4xx/Kconfig

@@ -225,7 +225,7 @@ config EMBEDDEDBOOT
 
 config IBM_OPENBIOS
 	bool
-	depends on ASH || BUBINGA || REDWOOD_5 || REDWOOD_6 || SYCAMORE || WALNUT
+	depends on ASH || REDWOOD_5 || REDWOOD_6
 	default y
 
 config PPC4xx_DMA

arch/ppc/platforms/4xx/bubinga.c

@@ -89,7 +89,7 @@ bubinga_early_serial_map(void)
           * by 16.
           */
 	uart_div = (mfdcr(DCRN_CPC0_UCR_BASE) & DCRN_CPC0_UCR_U0DIV);
-	uart_clock = __res.bi_pllouta_freq / uart_div;
+	uart_clock = __res.bi_procfreq / uart_div;
 
 	/* Setup serial port access */
 	memset(&port, 0, sizeof(port));

arch/ppc/platforms/4xx/bubinga.h

@@ -1,52 +1,34 @@
 /*
- * Support for IBM PPC 405EP evaluation board (Bubinga).
+ * arch/ppc/platforms/4xx/bubinga.h
  *
- * Author: SAW (IBM), derived from walnut.h.
- *         Maintained by MontaVista Software <source@mvista.com>
+ * Bubinga board definitions
+ *
+ * Copyright (c) 2005 DENX Software Engineering
+ * Stefan Roese <sr@denx.de>
+ *
+ * Based on original work by
+ *	SAW (IBM)
+ *	2003 (c) MontaVista Softare Inc.
+ *
+ * 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.
  *
- * 2003 (c) MontaVista Softare Inc.  This file is licensed under the
- * terms of the GNU General Public License version 2. This program is
- * licensed "as is" without any warranty of any kind, whether express
- * or implied.
  */
 
 #ifdef __KERNEL__
 #ifndef __BUBINGA_H__
 #define __BUBINGA_H__
 
-/* 405EP */
+#include <linux/config.h>
 #include <platforms/4xx/ibm405ep.h>
-
-#ifndef __ASSEMBLY__
-/*
- * Data structure defining board information maintained by the boot
- * ROM on IBM's evaluation board. An effort has been made to
- * keep the field names consistent with the 8xx 'bd_t' board info
- * structures.
- */
-
-typedef struct board_info {
-        unsigned char    bi_s_version[4];       /* Version of this structure */
-        unsigned char    bi_r_version[30];      /* Version of the IBM ROM */
-        unsigned int     bi_memsize;            /* DRAM installed, in bytes */
-        unsigned char    bi_enetaddr[2][6];     /* Local Ethernet MAC address */        unsigned char    bi_pci_enetaddr[6];    /* PCI Ethernet MAC address */
-        unsigned int     bi_intfreq;            /* Processor speed, in Hz */
-        unsigned int     bi_busfreq;            /* PLB Bus speed, in Hz */
-        unsigned int     bi_pci_busfreq;        /* PCI Bus speed, in Hz */
-        unsigned int     bi_opb_busfreq;        /* OPB Bus speed, in Hz */
-        unsigned int     bi_pllouta_freq;       /* PLL OUTA speed, in Hz */
-} bd_t;
-
-/* Some 4xx parts use a different timebase frequency from the internal clock.
-*/
-#define bi_tbfreq bi_intfreq
-
+#include <asm/ppcboot.h>
 
 /* Memory map for the Bubinga board.
  * Generic 4xx plus RTC.
  */
 
-extern void *bubinga_rtc_base;
 #define BUBINGA_RTC_PADDR	((uint)0xf0000000)
 #define BUBINGA_RTC_VADDR	BUBINGA_RTC_PADDR
 #define BUBINGA_RTC_SIZE	((uint)8*1024)
@@ -58,12 +40,18 @@ extern void *bubinga_rtc_base;
  * for typical configurations at various CPU speeds.
  * The base baud is calculated as (FWDA / EXT UART DIV / 16)
  */
-#define BASE_BAUD       0
+#define BASE_BAUD		0
 
-#define BUBINGA_FPGA_BASE      0xF0300000
+/* Flash */
+#define PPC40x_FPGA_BASE	0xF0300000
+#define PPC40x_FPGA_REG_OFFS	1	/* offset to flash map reg */
+#define PPC40x_FLASH_ONBD_N(x)	(x & 0x02)
+#define PPC40x_FLASH_SRAM_SEL(x) (x & 0x01)
+#define PPC40x_FLASH_LOW	0xFFF00000
+#define PPC40x_FLASH_HIGH	0xFFF80000
+#define PPC40x_FLASH_SIZE	0x80000
 
-#define PPC4xx_MACHINE_NAME     "IBM Bubinga"
+#define PPC4xx_MACHINE_NAME	"IBM Bubinga"
 
-#endif /* !__ASSEMBLY__ */
 #endif /* __BUBINGA_H__ */
 #endif /* __KERNEL__ */

arch/ppc/platforms/4xx/ebony.h

@@ -24,8 +24,8 @@
 #define PPC44x_EMAC0_MR0	0xE0000800
 
 /* Where to find the MAC info */
-#define EBONY_OPENBIOS_MAC_BASE   0xfffffe0c
-#define EBONY_OPENBIOS_MAC_OFFSET 0x0c
+#define OPENBIOS_MAC_BASE	0xfffffe0c
+#define OPENBIOS_MAC_OFFSET	0x0c
 
 /* Default clock rates for Rev. B and Rev. C silicon */
 #define EBONY_440GP_RB_SYSCLK	33000000

arch/ppc/platforms/4xx/sycamore.c

@@ -88,9 +88,6 @@ ppc405_map_irq(struct pci_dev *dev, unsigned char idsel, unsigned char pin)
 void __init
 sycamore_setup_arch(void)
 {
-#define SYCAMORE_PS2_BASE	0xF0100000
-#define SYCAMORE_FPGA_BASE	0xF0300000
-
 	void *fpga_brdc;
 	unsigned char fpga_brdc_data;
 	void *fpga_enable;
@@ -100,7 +97,7 @@ sycamore_setup_arch(void)
 
 	ppc4xx_setup_arch();
 
-	ibm_ocp_set_emac(0, 1);
+	ibm_ocp_set_emac(0, 0);
 
 	kb_data = ioremap(SYCAMORE_PS2_BASE, 8);
 	if (!kb_data) {
@@ -111,7 +108,7 @@ sycamore_setup_arch(void)
 
 	kb_cs = kb_data + 1;
 
-	fpga_status = ioremap(SYCAMORE_FPGA_BASE, 8);
+	fpga_status = ioremap(PPC40x_FPGA_BASE, 8);
 	if (!fpga_status) {
 		printk(KERN_CRIT
 		       "sycamore_setup_arch() fpga_status ioremap failed\n");