From 1d2c2a62e328db22c38e3dfb3c0a8a373333471b Mon Sep 17 00:00:00 2001 From: Kumar Gala Date: Thu, 13 Jan 2011 01:54:01 -0600 Subject: powerpc/85xx: Add the workaround for erratum CPC-A002 (enable on P4080) CoreNet Platform Cache single-bit tag error scrubbing will cause tag corruption. Disable the feature to workaround the issue. Signed-off-by: Kumar Gala --- arch/powerpc/cpu/mpc85xx/cmd_errata.c | 4 ++++ arch/powerpc/cpu/mpc85xx/cpu_init.c | 4 ++++ 2 files changed, 8 insertions(+) (limited to 'arch/powerpc/cpu/mpc85xx') diff --git a/arch/powerpc/cpu/mpc85xx/cmd_errata.c b/arch/powerpc/cpu/mpc85xx/cmd_errata.c index 4e2cb4a640..ae6af4f967 100644 --- a/arch/powerpc/cpu/mpc85xx/cmd_errata.c +++ b/arch/powerpc/cpu/mpc85xx/cmd_errata.c @@ -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; } diff --git a/arch/powerpc/cpu/mpc85xx/cpu_init.c b/arch/powerpc/cpu/mpc85xx/cpu_init.c index 354b222314..c822d871ae 100644 --- a/arch/powerpc/cpu/mpc85xx/cpu_init.c +++ b/arch/powerpc/cpu/mpc85xx/cpu_init.c @@ -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); -- cgit