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https://github.com/ARM-software/arm-trusted-firmware.git
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1af540ef2a
Rule 8.4: A compatible declaration shall be visible when
an object or function with external linkage is defined
Fixed for:
make DEBUG=1 PLAT=fvp LOG_LEVEL=50 all
Change-Id: I7c2ad3f5c015411c202605851240d5347e4cc8c7
Signed-off-by: Roberto Vargas <roberto.vargas@arm.com>
95 lines
2.8 KiB
C
95 lines
2.8 KiB
C
/*
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* Copyright (c) 2017-2018, ARM Limited and Contributors. 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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#include <debug.h>
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#include <mmio.h>
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#include <norflash.h>
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#include <plat_arm.h>
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#include <platform_def.h>
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#include <psci.h>
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#include <utils.h>
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static mem_region_t arm_ram_ranges[] = {
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{ARM_NS_DRAM1_BASE, ARM_NS_DRAM1_SIZE},
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#ifdef AARCH64
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{ARM_DRAM2_BASE, ARM_DRAM2_SIZE},
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#endif
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};
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/*******************************************************************************
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* Function that reads the content of the memory protect variable that
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* enables clearing of non secure memory when system boots. This variable
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* should be stored in a secure NVRAM.
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******************************************************************************/
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int arm_psci_read_mem_protect(int *enabled)
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{
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int tmp;
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tmp = *(int *) PLAT_ARM_MEM_PROT_ADDR;
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*enabled = (tmp == 1);
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return 0;
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}
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/*******************************************************************************
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* Function that writes the content of the memory protect variable that
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* enables overwritten of non secure memory when system boots.
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******************************************************************************/
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int arm_nor_psci_write_mem_protect(int val)
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{
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int enable = (val != 0);
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if (nor_unlock(PLAT_ARM_MEM_PROT_ADDR) != 0) {
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ERROR("unlocking memory protect variable\n");
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return -1;
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}
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if (enable) {
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/*
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* If we want to write a value different than 0
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* then we have to erase the full block because
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* otherwise we cannot ensure that the value programmed
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* into the flash is going to be the same than the value
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* requested by the caller
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*/
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if (nor_erase(PLAT_ARM_MEM_PROT_ADDR) != 0) {
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ERROR("erasing block containing memory protect variable\n");
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return -1;
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}
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}
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if (nor_word_program(PLAT_ARM_MEM_PROT_ADDR, enable) != 0) {
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ERROR("programming memory protection variable\n");
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return -1;
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}
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return 0;
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}
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/*******************************************************************************
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* Function used for required psci operations performed when
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* system boots
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******************************************************************************/
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void arm_nor_psci_do_mem_protect(void)
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{
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int enable;
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arm_psci_read_mem_protect(&enable);
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if (!enable)
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return;
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INFO("PSCI: Overwritting non secure memory\n");
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clear_mem_regions(arm_ram_ranges, ARRAY_SIZE(arm_ram_ranges));
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arm_nor_psci_write_mem_protect(0);
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}
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/*******************************************************************************
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* Function that checks if a region is protected by the memory protect
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* mechanism
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******************************************************************************/
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int arm_psci_mem_protect_chk(uintptr_t base, u_register_t length)
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{
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return mem_region_in_array_chk(arm_ram_ranges,
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ARRAY_SIZE(arm_ram_ranges),
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base, length);
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}
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