diff options
| author | Scott Wood | 2013-05-15 17:50:13 -0500 |
|---|---|---|
| committer | Andy Fleming | 2013-06-20 17:08:49 -0500 |
| commit | 8212519254bc3ea94d959f56f10061849aa07b26 (patch) | |
| tree | 9e9215a35509b017d7927f7ca213fa47dcc1a423 /arch/powerpc/cpu/mpc85xx | |
| parent | 362ee04b797d02117e48312010974d69c325be60 (diff) | |
powerpc/mpc85xx: work around erratum A-006593
Erratum A-006593 is "Atomic store may report failure but still allow
the store data to be visible".
The workaround is: "Set CoreNet Platform Cache register CPCHDBCR0 bit
21 to 1'b1. This may have a small impact on synthetic write bandwidth
benchmarks but should have a negligible impact on real code."
Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Andy Fleming <afleming@freescale.com>
Diffstat (limited to 'arch/powerpc/cpu/mpc85xx')
| -rw-r--r-- | arch/powerpc/cpu/mpc85xx/cmd_errata.c | 3 | ||||
| -rw-r--r-- | arch/powerpc/cpu/mpc85xx/cpu_init.c | 3 |
2 files changed, 6 insertions, 0 deletions
diff --git a/arch/powerpc/cpu/mpc85xx/cmd_errata.c b/arch/powerpc/cpu/mpc85xx/cmd_errata.c index 422782ca8f2..a7ed87769e4 100644 --- a/arch/powerpc/cpu/mpc85xx/cmd_errata.c +++ b/arch/powerpc/cpu/mpc85xx/cmd_errata.c @@ -258,6 +258,9 @@ static int do_errata(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) #ifdef CONFIG_SYS_FSL_ERRATUM_USB14 puts("Work-around for Erratum USB14 enabled\n"); #endif +#ifdef CONFIG_SYS_FSL_ERRATUM_A006593 + puts("Work-around for Erratum A006593 enabled\n"); +#endif return 0; } diff --git a/arch/powerpc/cpu/mpc85xx/cpu_init.c b/arch/powerpc/cpu/mpc85xx/cpu_init.c index 09901419817..3c8f59cdb36 100644 --- a/arch/powerpc/cpu/mpc85xx/cpu_init.c +++ b/arch/powerpc/cpu/mpc85xx/cpu_init.c @@ -172,6 +172,9 @@ static void enable_cpc(void) #ifdef CONFIG_SYS_FSL_ERRATUM_CPC_A003 setbits_be32(&cpc->cpchdbcr0, CPC_HDBCR0_DATA_ECC_SCRUB_DIS); #endif +#ifdef CONFIG_SYS_FSL_ERRATUM_A006593 + setbits_be32(&cpc->cpchdbcr0, 1 << (31 - 21)); +#endif out_be32(&cpc->cpccsr0, CPC_CSR0_CE | CPC_CSR0_PE); /* Read back to sync write */ |