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https://github.com/brain-hackers/u-boot-brain
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d6b72da029
In this case the secure code lives in RAM, and hence the memory node in the device tree needs to be adjusted. This avoids that the OS will map and possibly access the reservation. Add support for setting CONFIG_ARMV7_SECURE_RESERVE_SIZE to carve out such a region. We only support cutting off memory from the beginning or the end of a RAM bank as we do not want to increase their number (which would happen if punching a hole) for simplicity reasons This will be used in a subsequent patch for Jetson-TK1. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Tom Warren <twarren@nvidia.com>
51 lines
1.1 KiB
C
51 lines
1.1 KiB
C
/*
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* Copyright (c) 2013, Google Inc.
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*
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* Copyright (C) 2011
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* Corscience GmbH & Co. KG - Simon Schwarz <schwarz@corscience.de>
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* - Added prep subcommand support
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* - Reorganized source - modeled after powerpc version
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*
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* (C) Copyright 2002
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* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
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* Marius Groeger <mgroeger@sysgo.de>
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*
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* Copyright (C) 2001 Erik Mouw (J.A.K.Mouw@its.tudelft.nl)
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <fdt_support.h>
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#include <asm/armv7.h>
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#include <asm/psci.h>
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DECLARE_GLOBAL_DATA_PTR;
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int arch_fixup_fdt(void *blob)
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{
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bd_t *bd = gd->bd;
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int bank, ret;
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u64 start[CONFIG_NR_DRAM_BANKS];
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u64 size[CONFIG_NR_DRAM_BANKS];
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for (bank = 0; bank < CONFIG_NR_DRAM_BANKS; bank++) {
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start[bank] = bd->bi_dram[bank].start;
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size[bank] = bd->bi_dram[bank].size;
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#ifdef CONFIG_ARMV7_NONSEC
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ret = armv7_apply_memory_carveout(&start[bank], &size[bank]);
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if (ret)
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return ret;
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#endif
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}
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ret = fdt_fixup_memory_banks(blob, start, size, CONFIG_NR_DRAM_BANKS);
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#ifdef CONFIG_ARMV7_NONSEC
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if (ret)
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return ret;
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ret = psci_update_dt(blob);
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#endif
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return ret;
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}
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