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arm64: mvebu: do not map firmware RT service region

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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>
This commit is contained in:
Grzegorz Jaszczyk 2021-04-30 15:29:48 +02:00 committed by Stefan Roese
parent 762f9fba0f
commit a2122d8bab
2 changed files with 24 additions and 1 deletions
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12
arch/arm/mach-mvebu/armada8k/cpu.c
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@ -14,6 +14,7 @@
#include <asm/arch/cpu.h>
#include <asm/arch/soc.h>
#include <asm/armv8/mmu.h>
#include <mach/fw_info.h>
/* Armada 7k/8k */
#define MVEBU_RFU_BASE (MVEBU_REGISTER(0x6f0000))
@ -27,9 +28,18 @@
static struct mm_region mvebu_mem_map[] = {
/* Armada 80x0 memory regions include the CP1 (slave) units */
{
/* RAM */
/* RAM 0-64MB */
.phys = 0x0UL,
.virt = 0x0UL,
.size = ATF_REGION_START,
.attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) |
PTE_BLOCK_INNER_SHARE
},
/* ATF and TEE region 0x4000000-0x5400000 not mapped */
{
/* RAM 66MB-2GB */
.phys = ATF_REGION_END,
.virt = ATF_REGION_END,
.size = SZ_2G,
.attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) |
PTE_BLOCK_INNER_SHARE

13
arch/arm/mach-mvebu/include/mach/fw_info.h Normal file
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@ -0,0 +1,13 @@
/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (C) 2018 Marvell International Ltd.
*/
#ifndef _FW_INFO_H_
#define _FW_INFO_H_
/* Protected ATF and TEE region */
#define ATF_REGION_START 0x4000000
#define ATF_REGION_END 0x5400000
#endif /* _FW_INFO_H_ */