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arm64: mvebu: do not map firmware RT service region
There is region left by ATF, which needs to remain in memory to provide RT services. To prevent overwriting it by u-boot, do not provide any mapping for this memory region, so any attempt to access it will trigger synchronous exception. Update sr 2021-04-12: Don't update armada3700/cpu.c mmu table, as this has specific changes included in mainline. Signed-off-by: Grzegorz Jaszczyk <jaz@semihalf.com> Signed-off-by: Stefan Roese <sr@denx.de>
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@ -14,6 +14,7 @@
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#include <asm/arch/cpu.h>
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#include <asm/arch/soc.h>
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#include <asm/armv8/mmu.h>
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#include <mach/fw_info.h>
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/* Armada 7k/8k */
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#define MVEBU_RFU_BASE (MVEBU_REGISTER(0x6f0000))
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@ -27,9 +28,18 @@
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static struct mm_region mvebu_mem_map[] = {
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/* Armada 80x0 memory regions include the CP1 (slave) units */
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{
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/* RAM */
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/* RAM 0-64MB */
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.phys = 0x0UL,
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.virt = 0x0UL,
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.size = ATF_REGION_START,
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.attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) |
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PTE_BLOCK_INNER_SHARE
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},
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/* ATF and TEE region 0x4000000-0x5400000 not mapped */
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{
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/* RAM 66MB-2GB */
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.phys = ATF_REGION_END,
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.virt = ATF_REGION_END,
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.size = SZ_2G,
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.attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) |
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PTE_BLOCK_INNER_SHARE
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13
arch/arm/mach-mvebu/include/mach/fw_info.h
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arch/arm/mach-mvebu/include/mach/fw_info.h
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@ -0,0 +1,13 @@
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/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (C) 2018 Marvell International Ltd.
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*/
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#ifndef _FW_INFO_H_
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#define _FW_INFO_H_
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/* Protected ATF and TEE region */
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#define ATF_REGION_START 0x4000000
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#define ATF_REGION_END 0x5400000
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#endif /* _FW_INFO_H_ */
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