8794a26af3
- From https://gitlab.collabora.com/mediatek/aiot/boot/-/tree/main/patches/trusted-firmware-a at bc779c20dd5ea72a9f3edd248eb08460e3c837b6
106 lines
3.6 KiB
Diff
106 lines
3.6 KiB
Diff
From fc8cefeadefca5e4568f4266a619961537c107a5 Mon Sep 17 00:00:00 2001
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From: Bartosz Bilas <b.bilas@grinn-global.com>
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Date: Thu, 2 Oct 2025 13:08:24 +0200
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Subject: [PATCH] plat: mediatek: use libdram to pass actual memory size to
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U-Boot
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Since libdram can obtain the actual memory size at runtime, make it possible
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to pass this value to U-Boot. This allows the bootloader to adapt to boards
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with different DRAM sizes without requiring manual configuration.
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---
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plat/mediatek/mt8188/bl2_plat_setup.c | 5 +++++
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plat/mediatek/mt8188/drivers/libdram/libdram.h | 14 ++++++++++++++
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plat/mediatek/mt8188/drivers/libdram/rules.mk | 12 ++++++++++++
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plat/mediatek/mt8188/include/platform_def.h | 2 ++
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plat/mediatek/mt8188/platform_bl2.mk | 1 +
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5 files changed, 34 insertions(+)
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create mode 100644 plat/mediatek/mt8188/drivers/libdram/libdram.h
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create mode 100644 plat/mediatek/mt8188/drivers/libdram/rules.mk
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diff --git a/plat/mediatek/mt8188/bl2_plat_setup.c b/plat/mediatek/mt8188/bl2_plat_setup.c
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index 70a0564ff..8e6e33e4d 100644
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--- a/plat/mediatek/mt8188/bl2_plat_setup.c
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+++ b/plat/mediatek/mt8188/bl2_plat_setup.c
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@@ -33,6 +33,7 @@
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#if defined(PLAT_AB_BOOT_ENABLE)
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#include <mtk_ab.h>
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#endif
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+#include "libdram.h"
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void pwrap_init(void);
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void mt_mem_init(void);
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@@ -396,6 +397,10 @@ void bl2_platform_setup(void)
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load_partition_table(GPT_IMAGE_ID);
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blkdev_set_dramk_data_offset(get_part_addr("dramk"));
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mt_mem_init();
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+
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+ BOOT_ARGUMENT->magic_number = BOOT_ARGUMENT_MAGIC;
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+ BOOT_ARGUMENT->dram_size = platform_memory_size();
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+
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/* change emmc read buffer to DRAM */
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boot_dev_spec->buffer.offset = 0x41000000;
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boot_dev_spec->buffer.length = 0x1000000;
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diff --git a/plat/mediatek/mt8188/drivers/libdram/libdram.h b/plat/mediatek/mt8188/drivers/libdram/libdram.h
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new file mode 100644
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index 000000000..311d3a25c
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--- /dev/null
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+++ b/plat/mediatek/mt8188/drivers/libdram/libdram.h
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@@ -0,0 +1,14 @@
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+/*
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+ * Copyright (c) 2025 Grinn sp. z o.o
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+ *
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+ * SPDX-License-Identifier: BSD-3-Clause
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+ */
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+
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+#ifndef LIBDRAM_H
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+#define LIBDRAM_H
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+
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+#include <stdint.h>
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+
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+unsigned long long platform_memory_size(void);
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+
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+#endif /* LIBDRAM_H */
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diff --git a/plat/mediatek/mt8188/drivers/libdram/rules.mk b/plat/mediatek/mt8188/drivers/libdram/rules.mk
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new file mode 100644
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index 000000000..38f23c3dd
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--- /dev/null
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+++ b/plat/mediatek/mt8188/drivers/libdram/rules.mk
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@@ -0,0 +1,12 @@
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+#
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+# Copyright (c) 2025, Grinn sp. z o.o. All rights reserved.
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+#
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+# SPDX-License-Identifier: BSD-3-Clause
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+#
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+
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+LOCAL_DIR := $(call GET_LOCAL_DIR)
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+
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+MODULE := libdram
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+
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+PLAT_INCLUDES += -I${LOCAL_DIR}/
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+$(eval $(call MAKE_MODULE,$(MODULE),$(LOCAL_SRCS-y),$(MTK_BL)))
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diff --git a/plat/mediatek/mt8188/include/platform_def.h b/plat/mediatek/mt8188/include/platform_def.h
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index 23bc1ad7c..cfa0d3728 100644
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--- a/plat/mediatek/mt8188/include/platform_def.h
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+++ b/plat/mediatek/mt8188/include/platform_def.h
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@@ -303,6 +303,8 @@
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#define BL2_BASE (0x201000)
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#define BL2_LIMIT (0x400000)
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+#define BOOT_ARGUMENT_LOCATION (0x40000100)
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+
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#define MAX_IO_DEVICES U(3)
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#define MAX_IO_HANDLES U(4)
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#define MAX_IO_BLOCK_DEVICES 1
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diff --git a/plat/mediatek/mt8188/platform_bl2.mk b/plat/mediatek/mt8188/platform_bl2.mk
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index a851dc98b..421f2c824 100644
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--- a/plat/mediatek/mt8188/platform_bl2.mk
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+++ b/plat/mediatek/mt8188/platform_bl2.mk
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@@ -25,6 +25,7 @@ BL2_SOURCES += lib/cpus/aarch64/cortex_a55.S \
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${MTK_PLAT}/common/mtk_rgu.c
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MODULES-BL2-y += $(MTK_PLAT)/drivers/uart
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+MODULES-BL2-y += $(MTK_PLAT_SOC)/drivers/libdram
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MODULES-BL2-y += ${MTK_PLAT}/drivers/wdt
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MODULES-BL2-y += ${MTK_PLAT_SOC}/drivers/pll
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MODULES-BL2-y += $(MTK_PLAT_SOC)/drivers/pmic_bl2
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