From 901787d6e83b6a5beba5905fbc5441673dcd63e1 Mon Sep 17 00:00:00 2001
From: wdenk <wdenk>
Date: Sun, 3 Apr 2005 23:22:21 +0000
Subject: [PATCH] Patch by Jerry Van Baren, 08 Nov 2004: - Add low-boot option
 for MPC8260ADS board (if lowboot is selected,   the jumper for the HRCW
 source should select flash. If lowboot is   not selected, the jumper for the
 HRCW source should select the   BCSR. - change default load base address to
 0x00400000

---
 CHANGELOG                    |  7 +++++++
 Makefile                     | 12 ++++++++++++
 board/mpc8260ads/config.mk   |  7 ++++++-
 cpu/mpc8260/start.S          |  4 ++--
 include/configs/MPC8260ADS.h | 23 +++++++++++++++++++++--
 5 files changed, 48 insertions(+), 5 deletions(-)

diff --git a/CHANGELOG b/CHANGELOG
index e690bdd..239c82a 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -2,6 +2,13 @@
 Changes for U-Boot 1.1.3:
 ======================================================================
 
+* Patch by Jerry Van Baren, 08 Nov 2004:
+  - Add low-boot option for MPC8260ADS board (if lowboot is selected,
+    the jumper for the HRCW source should select flash. If lowboot is
+    not selected, the jumper for the HRCW source should select the
+    BCSR.
+  - change default load base address to 0x00400000
+
 * Patch by Yuli Barcohen, 08 Nov 2004:
   Add support for Analogue & Micro Rattler boards.
   Tested on Rattler8248.
diff --git a/Makefile b/Makefile
index 71ab993..806b75e 100644
--- a/Makefile
+++ b/Makefile
@@ -992,13 +992,21 @@ ISPAN_REVB_config:	unconfig
 	@./mkconfig -a ISPAN ppc mpc8260 ispan
 
 MPC8260ADS_config	\
+MPC8260ADS_lowboot_config	\
 MPC8260ADS_33MHz_config	\
+MPC8260ADS_33MHz_lowboot_config	\
 MPC8260ADS_40MHz_config	\
+MPC8260ADS_40MHz_lowboot_config	\
 MPC8272ADS_config	\
+MPC8272ADS_lowboot_config	\
 PQ2FADS_config		\
+PQ2FADS_lowboot_config		\
 PQ2FADS-VR_config	\
+PQ2FADS-VR_lowboot_config	\
 PQ2FADS-ZU_config	\
+PQ2FADS-ZU_lowboot_config	\
 PQ2FADS-ZU_66MHz_config	\
+PQ2FADS-ZU_66MHz_lowboot_config	\
 	:		unconfig
 	$(if $(findstring PQ2FADS,$@), \
 	@echo "#define CONFIG_ADSTYPE CFG_PQ2FADS" > include/config.h, \
@@ -1007,6 +1015,10 @@ PQ2FADS-ZU_66MHz_config	\
 	@echo "#define CONFIG_8260_CLKIN" $(subst MHz,,$(word 2,$(subst _, ,$@)))"000000" >> include/config.h, \
 	$(if $(findstring VR,$@), \
 	@echo "#define CONFIG_8260_CLKIN 66000000" >> include/config.h))
+	@[ -z "$(findstring lowboot_,$@)" ] || \
+		{ echo "TEXT_BASE = 0xFF800000" >board/mpc8260ads/config.tmp ; \
+		  echo "... with lowboot configuration" ; \
+		}
 	@./mkconfig -a MPC8260ADS ppc mpc8260 mpc8260ads
 
 MPC8266ADS_config:	unconfig
diff --git a/board/mpc8260ads/config.mk b/board/mpc8260ads/config.mk
index 3dca6da..eb6f7c9 100644
--- a/board/mpc8260ads/config.mk
+++ b/board/mpc8260ads/config.mk
@@ -29,4 +29,9 @@
 # MPC8260ADS, MPC8266ADS, and PQ2FADS-ZU/VR boards
 #
 
-TEXT_BASE = 0xfff00000
+sinclude $(TOPDIR)/board/$(BOARDDIR)/config.tmp
+
+ifndef TEXT_BASE
+## Standard: boot high
+TEXT_BASE = 0xFFF00000
+endif
diff --git a/cpu/mpc8260/start.S b/cpu/mpc8260/start.S
index a499bc1..2e93bbb 100644
--- a/cpu/mpc8260/start.S
+++ b/cpu/mpc8260/start.S
@@ -172,7 +172,7 @@ _start_warm:
 	b	boot_warm
 
 boot_cold:
-#if defined(CONFIG_MPC8260ADS)
+#if defined(CONFIG_MPC8260ADS) && defined(CFG_DEFAULT_IMMR)
 	lis	r3, CFG_DEFAULT_IMMR@h
 	nop
 	lwz	r4, 0(r3)
@@ -183,7 +183,7 @@ boot_cold:
 	nop
 	stw	r4, 0(r3)
 	nop
-#endif /* CONFIG_MPC8260ADS */
+#endif /* CONFIG_MPC8260ADS && CFG_DEFAULT_IMMR */
 boot_warm:
 	mfmsr	r5			/* save msr contents		*/
 
diff --git a/include/configs/MPC8260ADS.h b/include/configs/MPC8260ADS.h
index 6eec253..ed8fe6b 100644
--- a/include/configs/MPC8260ADS.h
+++ b/include/configs/MPC8260ADS.h
@@ -42,6 +42,14 @@
 
 #define CONFIG_MPC8260ADS	1	/* Motorola PQ2 ADS family board */
 
+/*
+ * Figure out if we are booting low via flash HRCW or high via the BCSR.
+ */
+#if (TEXT_BASE != 0xFFF00000)		/* Boot low (flash HRCW) */
+#   define CFG_LOWBOOT          1
+#endif
+
+
 /* ADS flavours */
 #define CFG_8260ADS		1	/* MPC8260ADS */
 #define CFG_8266ADS		2	/* MPC8266ADS */
@@ -252,7 +260,7 @@
 #define CFG_MEMTEST_START	0x00100000	/* memtest works on */
 #define CFG_MEMTEST_END		0x00f00000	/* 1 ... 15 MB in DRAM	*/
 
-#define CFG_LOAD_ADDR		0x100000	/* default load address */
+#define CFG_LOAD_ADDR		0x400000	/* default load address */
 
 #define CFG_HZ			1000	/* decrementer freq: 1 ms ticks */
 
@@ -274,7 +282,9 @@
 #define CFG_JFFS_CUSTOM_PART
 
 /* this is stuff came out of the Motorola docs */
+#ifndef CFG_LOWBOOT
 #define CFG_DEFAULT_IMMR	0x0F010000
+#endif
 
 #define CFG_IMMR		0xF0000000
 #define CFG_BCSR		0xF4500000
@@ -296,12 +306,21 @@
 #define CFG_INIT_SP_OFFSET	CFG_GBL_DATA_OFFSET
 
 
-/* 0x0EA28205 */
+#ifdef CFG_LOWBOOT
+/* PQ2FADS flash HRCW = 0x0EB4B645 */
+#define CFG_HRCW_MASTER (   ( HRCW_BPS11 | HRCW_CIP )			    |\
+			    ( HRCW_L2CPC10 | HRCW_DPPC11 | HRCW_ISB100 )    |\
+			    ( HRCW_BMS | HRCW_MMR11 | HRCW_LBPC01 | HRCW_APPC10 ) |\
+			    ( HRCW_CS10PC01 | HRCW_MODCK_H0101 )	     \
+			)
+#else
+/* PQ2FADS BCSR HRCW = 0x0CB23645 */
 #define CFG_HRCW_MASTER (   ( HRCW_BPS11 | HRCW_CIP )			    |\
 			    ( HRCW_L2CPC10 | HRCW_DPPC10 | HRCW_ISB010 )    |\
 			    ( HRCW_BMS | HRCW_APPC10 )			    |\
 			    ( HRCW_MODCK_H0101 )			     \
 			)
+#endif
 /* no slaves */
 #define CFG_HRCW_SLAVE1 0
 #define CFG_HRCW_SLAVE2 0
-- 
2.7.4