Patchwork [U-Boot,2/2] powerpc/85xx: Add the workaround for erratum CPC-A003 (enable on P4080)

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Submitter Kumar Gala
Date Jan. 13, 2011, 7:58 a.m.
Message ID <1294905499-32022-2-git-send-email-galak@kernel.crashing.org>
Download mbox | patch
Permalink /patch/78675/
State Accepted
Delegated to: Kumar Gala
Headers show

Comments

Kumar Gala - Jan. 13, 2011, 7:58 a.m.
CoreNet Platform Cache single-bit data error scrubbing will cause data
corruption.  Disable the feature to workaround the issue.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
---
 arch/powerpc/cpu/mpc85xx/cmd_errata.c |    3 +++
 arch/powerpc/cpu/mpc85xx/cpu_init.c   |    3 +++
 arch/powerpc/include/asm/immap_85xx.h |    1 +
 include/configs/P4080DS.h             |    1 +
 4 files changed, 8 insertions(+), 0 deletions(-)
Kumar Gala - Jan. 13, 2011, 10:15 p.m.
On Jan 13, 2011, at 1:58 AM, Kumar Gala wrote:

> CoreNet Platform Cache single-bit data error scrubbing will cause data
> corruption.  Disable the feature to workaround the issue.
> 
> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
> ---
> arch/powerpc/cpu/mpc85xx/cmd_errata.c |    3 +++
> arch/powerpc/cpu/mpc85xx/cpu_init.c   |    3 +++
> arch/powerpc/include/asm/immap_85xx.h |    1 +
> include/configs/P4080DS.h             |    1 +
> 4 files changed, 8 insertions(+), 0 deletions(-)

applied

- k

Patch

diff --git a/arch/powerpc/cpu/mpc85xx/cmd_errata.c b/arch/powerpc/cpu/mpc85xx/cmd_errata.c
index 3822cf0..e44a38f 100644
--- a/arch/powerpc/cpu/mpc85xx/cmd_errata.c
+++ b/arch/powerpc/cpu/mpc85xx/cmd_errata.c
@@ -65,6 +65,9 @@  static int do_errata(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 #ifdef CONFIG_SYS_FSL_ERRATUM_CPC_A002
 	puts("Work-around for Erratum CPC-A002 enabled\n");
 #endif
+#ifdef CONFIG_SYS_FSL_ERRATUM_CPC_A003
+	puts("Work-around for Erratum CPC-A003 enabled\n");
+#endif
 
 	return 0;
 }
diff --git a/arch/powerpc/cpu/mpc85xx/cpu_init.c b/arch/powerpc/cpu/mpc85xx/cpu_init.c
index c822d87..8ece970 100644
--- a/arch/powerpc/cpu/mpc85xx/cpu_init.c
+++ b/arch/powerpc/cpu/mpc85xx/cpu_init.c
@@ -145,6 +145,9 @@  static void enable_cpc(void)
 #ifdef CONFIG_SYS_FSL_ERRATUM_CPC_A002
 		setbits_be32(&cpc->cpchdbcr0, CPC_HDBCR0_TAG_ECC_SCRUB_DIS);
 #endif
+#ifdef CONFIG_SYS_FSL_ERRATUM_CPC_A003
+		setbits_be32(&cpc->cpchdbcr0, CPC_HDBCR0_DATA_ECC_SCRUB_DIS);
+#endif
 
 		out_be32(&cpc->cpccsr0, CPC_CSR0_CE | CPC_CSR0_PE);
 		/* Read back to sync write */
diff --git a/arch/powerpc/include/asm/immap_85xx.h b/arch/powerpc/include/asm/immap_85xx.h
index ed36290..133b31f 100644
--- a/arch/powerpc/include/asm/immap_85xx.h
+++ b/arch/powerpc/include/asm/immap_85xx.h
@@ -1603,6 +1603,7 @@  typedef struct cpc_corenet {
 #define	CPC_ERRDIS_TMHITDIS  	0x00000080	/* multi-way hit disable */
 #define CPC_HDBCR0_CDQ_SPEC_DIS	0x08000000
 #define CPC_HDBCR0_TAG_ECC_SCRUB_DIS	0x01000000
+#define CPC_HDBCR0_DATA_ECC_SCRUB_DIS	0x00400000
 #endif /* CONFIG_SYS_FSL_CPC */
 
 /* Global Utilities Block */
diff --git a/include/configs/P4080DS.h b/include/configs/P4080DS.h
index c269ddc..216f6fb 100644
--- a/include/configs/P4080DS.h
+++ b/include/configs/P4080DS.h
@@ -41,6 +41,7 @@ 
 
 #define CONFIG_SYS_P4080_ERRATUM_CPU22
 #define CONFIG_SYS_FSL_ERRATUM_CPC_A002
+#define CONFIG_SYS_FSL_ERRATUM_CPC_A003
 #define CONFIG_SYS_P4080_ERRATUM_SERDES8
 #define CONFIG_SYS_FSL_ERRATUM_DDR_A003