From 0c57f0a00bc194ddcba02ea64c79ce0dcc63af0f Mon Sep 17 00:00:00 2001
From: gdisirio <gdisirio@35acf78f-673a-0410-8e92-d51de3d6d3f4>
Date: Fri, 15 Feb 2013 15:23:50 +0000
Subject: git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@5190
 35acf78f-673a-0410-8e92-d51de3d6d3f4

---
 os/ports/GCC/PPC/SPC560Pxx/core.s | 49 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 49 insertions(+)

(limited to 'os/ports/GCC/PPC')

diff --git a/os/ports/GCC/PPC/SPC560Pxx/core.s b/os/ports/GCC/PPC/SPC560Pxx/core.s
index 246c39739..245887f28 100644
--- a/os/ports/GCC/PPC/SPC560Pxx/core.s
+++ b/os/ports/GCC/PPC/SPC560Pxx/core.s
@@ -71,6 +71,55 @@
         .globl      _coreinit
         .type       _coreinit, @function
 _coreinit:
+        /*
+         * 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.
+         */
+        xor         %r0, %r0, %r0
+        xor         %r1, %r1, %r1
+        xor         %r2, %r2, %r2
+        xor         %r3, %r3, %r3
+        xor         %r4, %r4, %r4
+        xor         %r5, %r5, %r5
+        xor         %r6, %r6, %r6
+        xor         %r7, %r7, %r7
+        xor         %r8, %r8, %r8
+        xor         %r9, %r9, %r9
+        xor         %r10, %r10, %r10
+        xor         %r11, %r11, %r11
+        xor         %r12, %r12, %r12
+        xor         %r13, %r13, %r13
+        xor         %r14, %r14, %r14
+        xor         %r15, %r15, %r15
+        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:
+
         /*
          * Branch prediction enabled.
          */
-- 
cgit v1.2.3