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powerpc/mpc85xx: work around erratum A-006593

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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>
This commit is contained in:
Scott Wood 2013-05-15 17:50:13 -05:00 committed by Andy Fleming
parent 362ee04b79
commit 8212519254
3 changed files with 8 additions and 0 deletions
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3
arch/powerpc/cpu/mpc85xx/cmd_errata.c
View File

@ -257,6 +257,9 @@ static int do_errata(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
#endif
#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;
}

3
arch/powerpc/cpu/mpc85xx/cpu_init.c
View File

@ -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 */

2
arch/powerpc/include/asm/config_mpc85xx.h
View File

@ -555,6 +555,7 @@
#define CONFIG_SYS_FSL_ERRATUM_A004468
#define CONFIG_SYS_FSL_ERRATUM_A_004934
#define CONFIG_SYS_FSL_ERRATUM_A005871
#define CONFIG_SYS_FSL_ERRATUM_A006593
#define CONFIG_SYS_CCSRBAR_DEFAULT 0xfe000000
#define CONFIG_SYS_FSL_PCI_VER_3_X
@ -576,6 +577,7 @@
#define CONFIG_SYS_FSL_USB1_PHY_ENABLE
#define CONFIG_SYS_FSL_ERRATUM_A_004934
#define CONFIG_SYS_FSL_ERRATUM_A005871
#define CONFIG_SYS_FSL_ERRATUM_A006593
#define CONFIG_SYS_CCSRBAR_DEFAULT 0xfe000000
#ifdef CONFIG_PPC_B4860