From a4357743064453c12daa5d22d3f7fcd3196a10d1 Mon Sep 17 00:00:00 2001
From: gdisirio <gdisirio@35acf78f-673a-0410-8e92-d51de3d6d3f4>
Date: Thu, 22 Nov 2012 11:50:50 +0000
Subject: [PATCH] git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@4836
 35acf78f-673a-0410-8e92-d51de3d6d3f4

---
 os/ports/GCC/PPC/SPC560BCxx/bam.s | 35 ++++++++++++++++++++++++++++++-
 os/ports/GCC/PPC/crt0.s           |  6 +++---
 2 files changed, 37 insertions(+), 4 deletions(-)

diff --git a/os/ports/GCC/PPC/SPC560BCxx/bam.s b/os/ports/GCC/PPC/SPC560BCxx/bam.s
index afb7b93b8..0e3905107 100644
--- a/os/ports/GCC/PPC/SPC560BCxx/bam.s
+++ b/os/ports/GCC/PPC/SPC560BCxx/bam.s
@@ -31,7 +31,40 @@
         /* BAM info, SWT off, WTE off, VLE from settings.*/
         .section    .bam, "ax"
         .long       0x015A0000
-        .long       _boot_address
+        .long       .clear_ecc
+
+        /* RAM clearing, this device requires a write to all RAM location in
+           order to initialize the ECC detection hardware, this is going to
+           slow down the startup but there is no way around.*/
+.clear_ecc:
+        xor         %r16, %r16, %r16
+        xor         %r17, %r17, %r17
+        xor         %r18, %r18, %r18
+        xor         %r19, %r19, %r19
+        xor         %r20, %r20, %r20
+        xor         %r21, %r21, %r21
+        xor         %r22, %r22, %r22
+        xor         %r23, %r23, %r23
+        xor         %r24, %r24, %r24
+        xor         %r25, %r25, %r25
+        xor         %r26, %r26, %r26
+        xor         %r27, %r27, %r27
+        xor         %r28, %r28, %r28
+        xor         %r29, %r29, %r29
+        xor         %r30, %r30, %r30
+        xor         %r31, %r31, %r31
+        lis         %r4, __ram_start__@h
+        ori         %r4, %r4, __ram_start__@l
+        lis         %r5, __ram_end__@h
+        ori         %r5, %r5, __ram_end__@l
+.cleareccloop:
+        cmpl        cr0, %r4, %r5
+        bge         cr0, .cleareccend
+        stmw        %r16, 0(%r4)
+        addi        %r4, %r4, 64
+        b           .cleareccloop
+.cleareccend:
+        b           _boot_address
 
 #endif /* !defined(__DOXYGEN__) */
 
diff --git a/os/ports/GCC/PPC/crt0.s b/os/ports/GCC/PPC/crt0.s
index d20cb7ffb..80dc4bdc5 100644
--- a/os/ports/GCC/PPC/crt0.s
+++ b/os/ports/GCC/PPC/crt0.s
@@ -36,8 +36,8 @@ _boot_address:
         /*
          * Stack setup.
          */
-        lis         %r1, __ram_end__@h
-        ori         %r1, %r1, __ram_end__@l
+        lis         %r1, __process_stack_end__@h
+        ori         %r1, %r1, __process_stack_end__@l
         li          %r0, 0
         stwu        %r0, -8(%r1)
         /*
@@ -45,7 +45,7 @@ _boot_address:
          */
         lis         %r4, __ivpr_base__@h
         ori         %r4, %r4, __ivpr_base__@l
-        mtIVPR      %r4    
+        mtIVPR      %r4
         /*
          * Small sections registers initialization.
          */