From a4357743064453c12daa5d22d3f7fcd3196a10d1 Mon Sep 17 00:00:00 2001 From: gdisirio Date: Thu, 22 Nov 2012 11:50:50 +0000 Subject: 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 ++++++++++++++++++++++++++++++++++- 1 file changed, 34 insertions(+), 1 deletion(-) (limited to 'os/ports/GCC/PPC/SPC560BCxx/bam.s') 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__) */ -- cgit v1.2.3