[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>

3 files changed, 133 insertions, 10 deletions

diff --git a/arch/ppc/boot/simple/Makefile b/arch/ppc/boot/simple/Makefile
index ff0904ee889d..82df88b01bbe 100644
--- a/arch/ppc/boot/simple/Makefile
+++ b/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
diff --git a/arch/ppc/boot/simple/misc.c b/arch/ppc/boot/simple/misc.c
index e02de5b467a4..f415d6c62362 100644
--- a/arch/ppc/boot/simple/misc.c
+++ b/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");
diff --git a/arch/ppc/boot/simple/openbios.c b/arch/ppc/boot/simple/openbios.c
index c732b6d70cfb..81f11d8b30a7 100644
--- a/arch/ppc/boot/simple/openbios.c
+++ b/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;
 }