board: ti: am64x: Add board support for am64x evm

Add board specific initialization for am64x based boards.

Signed-off-by: Dave Gerlach <d-gerlach@ti.com>

arch/arm/mach-k3/Kconfig

@@ -148,5 +148,6 @@ config SYS_K3_SPL_ATF
 	  after SPL from R5.
 
 source "board/ti/am65x/Kconfig"
+source "board/ti/am64x/Kconfig"
 source "board/ti/j721e/Kconfig"
 endif

board/ti/am64x/Kconfig

+# SPDX-License-Identifier: GPL-2.0+
+#
+# Copyright (C) 2020-2021 Texas Instruments Incorporated - https://www.ti.com/
+
+choice
+	prompt "K3 AM64 based boards"
+	optional
+
+config TARGET_AM642_A53_EVM
+	bool "TI K3 based AM642 EVM running on A53"
+	select ARM64
+	select SOC_K3_AM642
+	imply BOARD
+	imply SPL_BOARD
+
+config TARGET_AM642_R5_EVM
+	bool "TI K3 based AM642 EVM running on R5"
+	select CPU_V7R
+	select SYS_THUMB_BUILD
+	select K3_LOAD_SYSFW
+	select SOC_K3_AM642
+	imply SYS_K3_SPL_ATF
+
+endchoice
+
+if TARGET_AM642_A53_EVM
+
+config SYS_BOARD
+       default "am64x"
+
+config SYS_VENDOR
+       default "ti"
+
+config SYS_CONFIG_NAME
+       default "am64x_evm"
+
+endif
+
+if TARGET_AM642_R5_EVM
+
+config SYS_BOARD
+       default "am64x"
+
+config SYS_VENDOR
+       default "ti"
+
+config SYS_CONFIG_NAME
+       default "am64x_evm"
+
+config SPL_LDSCRIPT
+	default "arch/arm/mach-omap2/u-boot-spl.lds"
+
+endif

board/ti/am64x/Makefile

+#
+# Copyright (C) 2020-2021 Texas Instruments Incorporated - https://www.ti.com/
+#	Keerthy <j-keerthy@ti.com>
+#
+# SPDX-License-Identifier:     GPL-2.0+
+#
+
+obj-y	+= evm.o

board/ti/am64x/evm.c

+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Board specific initialization for AM642 EVM
+ *
+ * Copyright (C) 2020-2021 Texas Instruments Incorporated - https://www.ti.com/
+ *	Keerthy <j-keerthy@ti.com>
+ *
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <spl.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+int board_init(void)
+{
+	return 0;
+}
+
+int dram_init(void)
+{
+	gd->ram_size = 0x80000000;
+
+	return 0;
+}
+
+int dram_init_banksize(void)
+{
+	/* Bank 0 declares the memory available in the DDR low region */
+	gd->bd->bi_dram[0].start = CONFIG_SYS_SDRAM_BASE;
+	gd->bd->bi_dram[0].size = 0x80000000;
+	gd->ram_size = 0x80000000;
+
+	return 0;
+}
+
+#if defined(CONFIG_SPL_LOAD_FIT)
+int board_fit_config_name_match(const char *name)
+{
+#if defined(CONFIG_TARGET_AM642_A53_EVM)
+	if (!strcmp(name, "k3-am642-evm"))
+		return 0;
+#endif
+
+	return -1;
+}
+#endif

include/configs/am64x_evm.h

+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Configuration header file for K3 AM642 SoC family
+ *
+ * Copyright (C) 2020-2021 Texas Instruments Incorporated - https://www.ti.com/
+ *	Keerthy <j-keerthy@ti.com>
+ */
+
+#ifndef __CONFIG_AM642_EVM_H
+#define __CONFIG_AM642_EVM_H
+
+#include <linux/sizes.h>
+#include <config_distro_bootcmd.h>
+#include <environment/ti/mmc.h>
+
+/* DDR Configuration */
+#define CONFIG_SYS_SDRAM_BASE1		0x880000000
+
+#ifdef CONFIG_SYS_K3_SPL_ATF
+#define CONFIG_SPL_FS_LOAD_PAYLOAD_NAME	"tispl.bin"
+#endif
+
+#ifndef CONFIG_CPU_V7R
+#define CONFIG_SKIP_LOWLEVEL_INIT
+#endif
+
+#define CONFIG_SPL_MAX_SIZE		CONFIG_SYS_K3_MAX_DOWNLODABLE_IMAGE_SIZE
+#define CONFIG_SYS_INIT_SP_ADDR         (CONFIG_SPL_TEXT_BASE +	\
+					CONFIG_SYS_K3_NON_SECURE_MSRAM_SIZE - 4)
+/*
+ * Maximum size in memory allocated to the SPL BSS. Keep it as tight as
+ * possible (to allow the build to go through), as this directly affects
+ * our memory footprint. The less we use for BSS the more we have available
+ * for everything else.
+ */
+#define CONFIG_SPL_BSS_MAX_SIZE		0x5000
+/*
+ * Link BSS to be within SPL in a dedicated region located near the top of
+ * the MCU SRAM, this way making it available also before relocation. Note
+ * that we are not using the actual top of the MCU SRAM as there is a memory
+ * location filled in by the boot ROM that we want to read out without any
+ * interference from the C context.
+ */
+#define CONFIG_SPL_BSS_START_ADDR	(CONFIG_SYS_K3_BOOT_PARAM_TABLE_INDEX -\
+					 CONFIG_SPL_BSS_MAX_SIZE)
+/* Configure R5 SPL post-relocation malloc pool in DDR */
+#define CONFIG_SYS_SPL_MALLOC_START    0x84000000
+#define CONFIG_SYS_SPL_MALLOC_SIZE     SZ_16M
+
+#define PARTS_DEFAULT \
+	/* Linux partitions */ \
+	"name=rootfs,start=0,size=-,uuid=${uuid_gpt_rootfs}\0"
+
+/* U-Boot general configuration */
+#define EXTRA_ENV_AM642_BOARD_SETTINGS					\
+	"default_device_tree=" CONFIG_DEFAULT_DEVICE_TREE ".dtb\0"	\
+	"findfdt="							\
+		"setenv name_fdt ${default_device_tree};"		\
+		"setenv fdtfile ${name_fdt}\0"				\
+	"name_kern=Image\0"						\
+	"console=ttyS2,115200n8\0"					\
+	"args_all=setenv optargs earlycon=ns16550a,mmio32,0x02800000 "	\
+		"${mtdparts}\0"						\
+	"run_kern=booti ${loadaddr} ${rd_spec} ${fdtaddr}\0"
+
+/* U-Boot MMC-specific configuration */
+#define EXTRA_ENV_AM642_BOARD_SETTINGS_MMC				\
+	"boot=mmc\0"							\
+	"mmcdev=1\0"							\
+	"bootpart=1:2\0"						\
+	"bootdir=/boot\0"						\
+	"rd_spec=-\0"							\
+	"init_mmc=run args_all args_mmc\0"				\
+	"get_fdt_mmc=load mmc ${bootpart} ${fdtaddr} ${bootdir}/${name_fdt}\0" \
+	"get_overlay_mmc="						\
+		"fdt address ${fdtaddr};"				\
+		"fdt resize 0x100000;"					\
+		"for overlay in $name_overlays;"			\
+		"do;"							\
+		"load mmc ${bootpart} ${dtboaddr} ${bootdir}/${overlay} && "	\
+		"fdt apply ${dtboaddr};"				\
+		"done;\0"						\
+	"get_kern_mmc=load mmc ${bootpart} ${loadaddr} "		\
+		"${bootdir}/${name_kern}\0"				\
+	"get_fit_mmc=load mmc ${bootpart} ${addr_fit} "			\
+		"${bootdir}/${name_fit}\0"				\
+	"partitions=" PARTS_DEFAULT
+
+/* Incorporate settings into the U-Boot environment */
+#define CONFIG_EXTRA_ENV_SETTINGS					\
+	DEFAULT_LINUX_BOOT_ENV						\
+	DEFAULT_MMC_TI_ARGS						\
+	EXTRA_ENV_AM642_BOARD_SETTINGS					\
+	EXTRA_ENV_AM642_BOARD_SETTINGS_MMC
+
+/* Now for the remaining common defines */
+#include <configs/ti_armv7_common.h>
+
+/* MMC ENV related defines */
+#ifdef CONFIG_ENV_IS_IN_MMC
+#define CONFIG_SYS_MMC_ENV_DEV		0
+#define CONFIG_SYS_MMC_ENV_PART	1
+#endif
+
+#endif /* __CONFIG_AM642_EVM_H */