barebox: force memory size to 64MB

This barebox version autodetects memory, but at installation time it detects 8MB instead of 64MB. This patch forces 64MB, like we used to do in v2012.05 when no autodetection was there (actually, there the pm9g45 harwired 128MB, but this had no side effects for us). Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

barebox: force memory size to 64MB
This barebox version autodetects memory, but at installation time it detects 8MB instead of 64MB. This patch forces 64MB, like we used to do in v2012.05 when no autodetection was there (actually, there the pm9g45 harwired 128MB, but this had no side effects for us). Signed-off-by: Alessandro Rubini <rubini@gnudd.com>
c66964e6 · Alessandro Rubini · 9c32cb7b · c66964e6
Commit c66964e6 authored May 13, 2014 by Alessandro Rubini
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0008-wrs-on-pm9g45-force-memory-to-64MB.patch ...ox/v2014.04/0008-wrs-on-pm9g45-force-memory-to-64MB.patch +42 -0

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--- a/patches/barebox/v2014.04/0008-wrs-on-pm9g45-force-memory-to-64MB.patch
+++ b/patches/barebox/v2014.04/0008-wrs-on-pm9g45-force-memory-to-64MB.patch
+From 19d3d10267b52b3e4f35ec60051c0d96b0effdd8 Mon Sep 17 00:00:00 2001
+From: Alessandro Rubini <rubini@gnudd.com>
+Date: Tue, 13 May 2014 10:10:28 +0200
+Subject: [PATCH 08/10] wrs (on pm9g45): force memory to 64MB
+
+For some reason, yet unknown, autodetection of memory size during
+installation fails and returns 8MB instead of 64MB. This make
+installation fail.  The sam9g45 code reads the ddr configuration to
+calculate memory size, but it looks like memory configuration is
+different from the runtime one
+
+At install time (loader-configured RAM)    CR = 0x7024, MDR = 0x10
+At run time (at91boot-configured RAM)      CR = 0x0030, MDR = 0x16
+
+However, memory is actually all working, there is no 8MB-wide aliasing
+in place.
+
+I didn't go as far as to check what is happening, and just restored
+the hardwired value, like we had in barebox-v2012.05 (actually,
+*there* it was oversized).
+
+Signed-off-by: Alessandro Rubini <rubini@gnudd.com>
+---
+ arch/arm/boards/pm9g45/init.c |    2 +-
+ 1 files changed, 1 insertions(+), 1 deletions(-)
+
+diff --git a/arch/arm/boards/pm9g45/init.c b/arch/arm/boards/pm9g45/init.c
+index 9665c18..1f7cc1c 100644
+--- a/arch/arm/boards/pm9g45/init.c
+++ b/arch/arm/boards/pm9g45/init.c
+@@ -172,7 +172,7 @@ static void pm9g45_add_device_eth(void)
+ 
+ static int pm9g45_mem_init(void)
+ {
+-	at91_add_device_sdram(0);
+	at91_add_device_sdram(64 << 20); /* Hack: autodetection fails */
+ 
+ 	return 0;
+ }
+-- 
+1.7.7.2
+