[U-Boot] [PATCHv4 2/3] arm: socfpga: spl: add board_init_f to SPL

[dinguyen at opensource.altera.com]

From: Dinh Nguyen <dinguyen at opensource.altera.com>

Remap SDRAM to 0x0, and clear OCRAM's ECC in board_init_f().

Signed-off-by: Dinh Nguyen <dinguyen at opensource.altera.com>
Reviewed-by: Marek Vasut <marex at denx.de>
---
v4: remove CONFIG_SPL_BUILD and add a comment
v3: Move the code from s_init to board_init_f
---
 arch/arm/cpu/armv7/socfpga/spl.c | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/arch/arm/cpu/armv7/socfpga/spl.c b/arch/arm/cpu/armv7/socfpga/spl.c
index d7cedad..f994658 100644
--- a/arch/arm/cpu/armv7/socfpga/spl.c
+++ b/arch/arm/cpu/armv7/socfpga/spl.c
@@ -6,6 +6,7 @@
 
 #include <common.h>
 #include <asm/io.h>
+#include <asm/pl310.h>
 #include <asm/u-boot.h>
 #include <asm/utils.h>
 #include <image.h>
@@ -19,6 +20,9 @@
 
 DECLARE_GLOBAL_DATA_PTR;
 
+static struct pl310_regs *const pl310 =
+	(struct pl310_regs *)CONFIG_SYS_PL310_BASE;
+
 #define MAIN_VCO_BASE (					\
 	(CONFIG_HPS_MAINPLLGRP_VCO_DENOM <<		\
 		CLKMGR_MAINPLLGRP_VCO_DENOM_OFFSET) |	\
@@ -44,6 +48,31 @@ DECLARE_GLOBAL_DATA_PTR;
 		CLKMGR_SDRPLLGRP_VCO_NUMER_OFFSET)	\
 	)
 
+void board_init_f(ulong dummy)
+{
+	struct socfpga_system_manager *sysmgr_regs =
+		(struct socfpga_system_manager *)SOCFPGA_SYSMGR_ADDRESS;
+	unsigned long reg;
+	/*
+	 * First C code to run. Clear fake OCRAM ECC first as SBE
+	 * and DBE might triggered during power on
+	 */
+	reg = readl(&sysmgr_regs->eccgrp_ocram);
+	if (reg & SYSMGR_ECC_OCRAM_SERR)
+		writel(SYSMGR_ECC_OCRAM_SERR | SYSMGR_ECC_OCRAM_EN,
+		       &sysmgr_regs->eccgrp_ocram);
+	if (reg & SYSMGR_ECC_OCRAM_DERR)
+		writel(SYSMGR_ECC_OCRAM_DERR  | SYSMGR_ECC_OCRAM_EN,
+		       &sysmgr_regs->eccgrp_ocram);
+
+	memset(__bss_start, 0, __bss_end - __bss_start);
+
+	/* Remap SDRAM to 0x0 */
+	writel(0x1, &pl310->pl310_addr_filter_start);
+
+	board_init_r(NULL, 0);
+}
+
 u32 spl_boot_device(void)
 {
 	return BOOT_DEVICE_RAM;
-- 
2.2.1