From 3b6bf8115ff2d85caa5b0af366b7053d5c7822fd Mon Sep 17 00:00:00 2001 From: Hou Zhiqiang Date: Fri, 16 Dec 2016 17:15:46 +0800 Subject: armv8/fsl_lsch2: Add the OCRAM initialization Clear the content to zero and the ECC error bit of OCRAM1/2. The OCRAM must be initialized to ZERO by the unit of 8-Byte before accessing it, or else it will generate ECC error. And the IBR has accessed the OCRAM before this initialization, so the ECC error status bit should to be cleared. Signed-off-by: Hou Zhiqiang Signed-off-by: Pratiyush Srivastava Signed-off-by: Prabhakar Kushwaha Reviewed-by: York Sun --- arch/arm/cpu/armv8/fsl-layerscape/lowlevel.S | 37 +++++++++++++++++++++++ arch/arm/include/asm/arch-fsl-layerscape/config.h | 3 ++ 2 files changed, 40 insertions(+) (limited to 'arch/arm') diff --git a/arch/arm/cpu/armv8/fsl-layerscape/lowlevel.S b/arch/arm/cpu/armv8/fsl-layerscape/lowlevel.S index 340445922d..04a2598006 100644 --- a/arch/arm/cpu/armv8/fsl-layerscape/lowlevel.S +++ b/arch/arm/cpu/armv8/fsl-layerscape/lowlevel.S @@ -229,10 +229,47 @@ ENTRY(lowlevel_init) isb #endif +#if defined(CONFIG_FSL_LSCH2) && !defined(CONFIG_SPL_BUILD) + bl fsl_ocram_init +#endif + mov lr, x29 /* Restore LR */ ret ENDPROC(lowlevel_init) +#if defined(CONFIG_FSL_LSCH2) && !defined(CONFIG_SPL_BUILD) +ENTRY(fsl_ocram_init) + mov x28, lr /* Save LR */ + bl fsl_clear_ocram + bl fsl_ocram_clear_ecc_err + mov lr, x28 /* Restore LR */ + ret +ENDPROC(fsl_ocram_init) + +ENTRY(fsl_clear_ocram) +/* Clear OCRAM */ + ldr x0, =CONFIG_SYS_FSL_OCRAM_BASE + ldr x1, =(CONFIG_SYS_FSL_OCRAM_BASE + CONFIG_SYS_FSL_OCRAM_SIZE) + mov x2, #0 +clear_loop: + str x2, [x0] + add x0, x0, #8 + cmp x0, x1 + b.lo clear_loop + ret +ENDPROC(fsl_clear_ocram) + +ENTRY(fsl_ocram_clear_ecc_err) + /* OCRAM1/2 ECC status bit */ + mov w1, #0x60 + ldr x0, =DCSR_DCFG_SBEESR2 + str w1, [x0] + ldr x0, =DCSR_DCFG_MBEESR2 + str w1, [x0] + ret +ENDPROC(fsl_ocram_init) +#endif + #ifdef CONFIG_FSL_LSCH3 .globl get_svr get_svr: diff --git a/arch/arm/include/asm/arch-fsl-layerscape/config.h b/arch/arm/include/asm/arch-fsl-layerscape/config.h index b3818723ee..045825eb97 100644 --- a/arch/arm/include/asm/arch-fsl-layerscape/config.h +++ b/arch/arm/include/asm/arch-fsl-layerscape/config.h @@ -126,6 +126,9 @@ #define SYS_FSL_OCRAM_SPACE_SIZE 0x00200000 /* 2M space */ #define CONFIG_SYS_FSL_OCRAM_SIZE 0x00020000 /* Real size 128K */ +#define DCSR_DCFG_SBEESR2 0x20140534 +#define DCSR_DCFG_MBEESR2 0x20140544 + #define CONFIG_SYS_FSL_CCSR_SCFG_BE #define CONFIG_SYS_FSL_ESDHC_BE #define CONFIG_SYS_FSL_WDOG_BE -- cgit