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powerpc/85xx: Add the workaround for erratum CPC-A002 (enable on P4080)

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CoreNet Platform Cache single-bit tag error scrubbing will cause tag
corruption.  Disable the feature to workaround the issue.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
This commit is contained in:
Kumar Gala 2011-01-13 01:54:01 -06:00
parent 7c57f3e859
commit 1d2c2a62e3
4 changed files with 11 additions and 1 deletions
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4
arch/powerpc/cpu/mpc85xx/cmd_errata.c
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@ -59,6 +59,10 @@ static int do_errata(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
#if defined(CONFIG_SYS_FSL_ERRATUM_ESDHC136)
puts("Work-around for Erratum ESDHC136 enabled\n");
#endif
#ifdef CONFIG_SYS_FSL_ERRATUM_CPC_A002
puts("Work-around for Erratum CPC-A002 enabled\n");
#endif
return 0;
}

4
arch/powerpc/cpu/mpc85xx/cpu_init.c
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@ -142,6 +142,10 @@ static void enable_cpc(void)
u32 cpccfg0 = in_be32(&cpc->cpccfg0);
size += CPC_CFG0_SZ_K(cpccfg0);
#ifdef CONFIG_SYS_FSL_ERRATUM_CPC_A002
setbits_be32(&cpc->cpchdbcr0, CPC_HDBCR0_TAG_ECC_SCRUB_DIS);
#endif
out_be32(&cpc->cpccsr0, CPC_CSR0_CE | CPC_CSR0_PE);
/* Read back to sync write */
in_be32(&cpc->cpccsr0);

3
arch/powerpc/include/asm/immap_85xx.h
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@ -1,7 +1,7 @@
/*
* MPC85xx Internal Memory Map
*
* Copyright 2007-2010 Freescale Semiconductor, Inc.
* Copyright 2007-2011 Freescale Semiconductor, Inc.
*
* Copyright(c) 2002,2003 Motorola Inc.
* Xianghua Xiao (x.xiao@motorola.com)
@ -1619,6 +1619,7 @@ typedef struct cpc_corenet {
#define CPC_SRCR0_SRAMEN 0x00000001
#define CPC_ERRDIS_TMHITDIS 0x00000080 /* multi-way hit disable */
#define CPC_HDBCR0_CDQ_SPEC_DIS 0x08000000
#define CPC_HDBCR0_TAG_ECC_SCRUB_DIS 0x01000000
#endif /* CONFIG_SYS_FSL_CPC */
/* Global Utilities Block */

1
include/configs/P4080DS.h
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@ -40,6 +40,7 @@
#define CONFIG_SYS_FSL_ERRATUM_ESDHC136
#define CONFIG_SYS_P4080_ERRATUM_CPU22
#define CONFIG_SYS_FSL_ERRATUM_CPC_A002
#define CONFIG_SYS_P4080_ERRATUM_SERDES8
#include "corenet_ds.h"