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| author | Shengzhou Liu <Shengzhou.Liu@nxp.com> | 2016-04-07 16:22:21 +0800 |
|---|---|---|
| committer | York Sun <york.sun@nxp.com> | 2016-05-17 09:26:19 -0700 |
| commit | 074596c0b5f4e9a3642a3159a9fc7f8b8064c18a (patch) | |
| tree | 645933dc5c430f57d2c27ce98af98329d02852e0 /arch/arm/cpu/armv8 | |
| parent | aeaec0e682f45b9e0c62c522fafea353931f73ed (diff) | |
| download | u-boot-imx-074596c0b5f4e9a3642a3159a9fc7f8b8064c18a.zip u-boot-imx-074596c0b5f4e9a3642a3159a9fc7f8b8064c18a.tar.gz u-boot-imx-074596c0b5f4e9a3642a3159a9fc7f8b8064c18a.tar.bz2 | |
armv8/ls1043: Add workaround for DDR erratum A-008850
Barrier transactions from CCI400 need to be disabled till
the DDR is configured, otherwise it may lead to system hang.
The patch adds workaround to fix the erratum.
Signed-off-by: Shengzhou Liu <Shengzhou.Liu@nxp.com>
Reviewed-by: York Sun <york.sun@nxp.com>
Diffstat (limited to 'arch/arm/cpu/armv8')
| -rw-r--r-- | arch/arm/cpu/armv8/fsl-layerscape/soc.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/arch/arm/cpu/armv8/fsl-layerscape/soc.c b/arch/arm/cpu/armv8/fsl-layerscape/soc.c index 0cb0100..0fb5c7f 100644 --- a/arch/arm/cpu/armv8/fsl-layerscape/soc.c +++ b/arch/arm/cpu/armv8/fsl-layerscape/soc.c @@ -12,6 +12,8 @@ #include <asm/io.h> #include <asm/global_data.h> #include <asm/arch-fsl-layerscape/config.h> +#include <fsl_ddr_sdram.h> +#include <fsl_ddr.h> #ifdef CONFIG_CHAIN_OF_TRUST #include <fsl_validate.h> #endif @@ -271,6 +273,39 @@ static void erratum_a009660(void) #endif } +static void erratum_a008850_early(void) +{ +#ifdef CONFIG_SYS_FSL_ERRATUM_A008850 + /* part 1 of 2 */ + struct ccsr_cci400 __iomem *cci = (void *)CONFIG_SYS_CCI400_ADDR; + struct ccsr_ddr __iomem *ddr = (void *)CONFIG_SYS_FSL_DDR_ADDR; + + /* disables propagation of barrier transactions to DDRC from CCI400 */ + out_le32(&cci->ctrl_ord, CCI400_CTRLORD_TERM_BARRIER); + + /* disable the re-ordering in DDRC */ + ddr_out32(&ddr->eor, DDR_EOR_RD_REOD_DIS | DDR_EOR_WD_REOD_DIS); +#endif +} + +void erratum_a008850_post(void) +{ +#ifdef CONFIG_SYS_FSL_ERRATUM_A008850 + /* part 2 of 2 */ + struct ccsr_cci400 __iomem *cci = (void *)CONFIG_SYS_CCI400_ADDR; + struct ccsr_ddr __iomem *ddr = (void *)CONFIG_SYS_FSL_DDR_ADDR; + u32 tmp; + + /* enable propagation of barrier transactions to DDRC from CCI400 */ + out_le32(&cci->ctrl_ord, CCI400_CTRLORD_EN_BARRIER); + + /* enable the re-ordering in DDRC */ + tmp = ddr_in32(&ddr->eor); + tmp &= ~(DDR_EOR_RD_REOD_DIS | DDR_EOR_WD_REOD_DIS); + ddr_out32(&ddr->eor, tmp); +#endif +} + void fsl_lsch2_early_init_f(void) { struct ccsr_cci400 *cci = (struct ccsr_cci400 *)CONFIG_SYS_CCI400_ADDR; @@ -295,6 +330,7 @@ void fsl_lsch2_early_init_f(void) CCI400_DVM_MESSAGE_REQ_EN | CCI400_SNOOP_REQ_EN); /* Erratum */ + erratum_a008850_early(); /* part 1 of 2 */ erratum_a009929(); erratum_a009660(); } |