stm32mp2: initial support

Add initial support for STM32MP2 SoCs family.

SoCs information are available here :
https://www.st.com/content/st_com/en/campaigns/microprocessor-stm32mp2.html

Migrate all MP1 related code into stm32mp1/ directory
Create stm32mp2 directory dedicated for STM32MP2 SoCs.

Common code to MP1, MP13 and MP25 is kept into
arch/arm/mach-stm32/mach-stm32mp directory :
  - boot_params.c
  - bsec
  - cmd_stm32key
  - cmd_stm32prog
  - dram_init.c
  - syscon.c
  - ecdsa_romapi.c

For STM32MP2, it also :
  - adds memory region description needed for ARMv8 MMU.
  - enables early data cache before relocation.
    During the transition before/after relocation, the MMU, initially setup
    at the beginning of DDR, must be setup again at a correct address after
    relocation. This is done in enables_caches() by disabling cache, force
    arch.tlb_fillptr to NULL which will force the MMU to be setup again but
    with a new value for gd->arch.tlb_addr. gd->arch.tlb_addr has been
    updated after relocation in arm_reserve_mmu().

Signed-off-by: Patrice Chotard <patrice.chotard@foss.st.com>
Reviewed-by: Patrick Delaunay <patrick.delaunay@foss.st.com>

4 files changed, 80 insertions, 0 deletions

diff --git a/board/st/stm32mp2/Kconfig b/board/st/stm32mp2/Kconfig
new file mode 100644
index 00000000000..89039f068a2
--- /dev/null
+++ b/board/st/stm32mp2/Kconfig
@@ -0,0 +1,13 @@
+if TARGET_ST_STM32MP25X
+
+config SYS_BOARD
+	default "stm32mp2"
+
+config SYS_VENDOR
+	default "st"
+
+config SYS_CONFIG_NAME
+	default "stm32mp25_common"
+
+source "board/st/common/Kconfig"
+endif
diff --git a/board/st/stm32mp2/MAINTAINERS b/board/st/stm32mp2/MAINTAINERS
new file mode 100644
index 00000000000..e6bea910f92
--- /dev/null
+++ b/board/st/stm32mp2/MAINTAINERS
@@ -0,0 +1,9 @@
+STM32MP2 BOARD
+M:	Patrice Chotard <patrice.chotard@st.com>
+M:	Patrick Delaunay <patrick.delaunay@st.com>
+L:	uboot-stm32@st-md-mailman.stormreply.com (moderated for non-subscribers)
+S:	Maintained
+F:	arch/arm/dts/stm32mp25*
+F:	board/st/stm32mp2/
+F:	configs/stm32mp25_defconfig
+F:	include/configs/stm32mp25_common.h
diff --git a/board/st/stm32mp2/Makefile b/board/st/stm32mp2/Makefile
new file mode 100644
index 00000000000..50352fb71b4
--- /dev/null
+++ b/board/st/stm32mp2/Makefile
@@ -0,0 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0-or-later OR BSD-3-Clause
+#
+# Copyright (C) 2023, STMicroelectronics - All Rights Reserved
+#
+
+obj-y += stm32mp2.o
diff --git a/board/st/stm32mp2/stm32mp2.c b/board/st/stm32mp2/stm32mp2.c
new file mode 100644
index 00000000000..132c511ce96
--- /dev/null
+++ b/board/st/stm32mp2/stm32mp2.c
@@ -0,0 +1,52 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR BSD-3-Clause
+/*
+ * Copyright (C) 2023, STMicroelectronics - All Rights Reserved
+ */
+
+#define LOG_CATEGORY LOGC_BOARD
+
+#include <common.h>
+#include <config.h>
+#include <env.h>
+#include <fdt_support.h>
+#include <asm/global_data.h>
+#include <asm/arch/sys_proto.h>
+
+/*
+ * Get a global data pointer
+ */
+DECLARE_GLOBAL_DATA_PTR;
+
+/* board dependent setup after realloc */
+int board_init(void)
+{
+	return 0;
+}
+
+int board_late_init(void)
+{
+	const void *fdt_compat;
+	int fdt_compat_len;
+	char dtb_name[256];
+	int buf_len;
+
+	if (IS_ENABLED(CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG)) {
+		fdt_compat = fdt_getprop(gd->fdt_blob, 0, "compatible",
+					 &fdt_compat_len);
+		if (fdt_compat && fdt_compat_len) {
+			if (strncmp(fdt_compat, "st,", 3) != 0) {
+				env_set("board_name", fdt_compat);
+			} else {
+				env_set("board_name", fdt_compat + 3);
+
+				buf_len = sizeof(dtb_name);
+				strlcpy(dtb_name, fdt_compat + 3, buf_len);
+				buf_len -= strlen(fdt_compat + 3);
+				strlcat(dtb_name, ".dtb", buf_len);
+				env_set("fdtfile", dtb_name);
+			}
+		}
+	}
+
+	return 0;
+}