71 lines
2.1 KiB
C
71 lines
2.1 KiB
C
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/*
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* Copyright (C) 2013 - ARM Ltd
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* Author: Marc Zyngier <marc.zyngier@arm.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <common.h>
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#include <errno.h>
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#include <stdio_dev.h>
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#include <linux/ctype.h>
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#include <linux/types.h>
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#include <asm/global_data.h>
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#include <linux/libfdt.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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int armv7_apply_memory_carveout(u64 *start, u64 *size)
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{
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#ifdef CONFIG_ARMV7_SECURE_RESERVE_SIZE
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if (*start + *size < CONFIG_ARMV7_SECURE_BASE ||
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*start >= (u64)CONFIG_ARMV7_SECURE_BASE +
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CONFIG_ARMV7_SECURE_RESERVE_SIZE)
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return 0;
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/* carveout must be at the beginning or the end of the bank */
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if (*start == CONFIG_ARMV7_SECURE_BASE ||
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*start + *size == (u64)CONFIG_ARMV7_SECURE_BASE +
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CONFIG_ARMV7_SECURE_RESERVE_SIZE) {
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if (*size < CONFIG_ARMV7_SECURE_RESERVE_SIZE) {
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debug("Secure monitor larger than RAM bank!?\n");
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return -EINVAL;
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}
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*size -= CONFIG_ARMV7_SECURE_RESERVE_SIZE;
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if (*start == CONFIG_ARMV7_SECURE_BASE)
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*start += CONFIG_ARMV7_SECURE_RESERVE_SIZE;
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return 0;
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}
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debug("Secure monitor not located at beginning or end of RAM bank\n");
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return -EINVAL;
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#else /* !CONFIG_ARMV7_SECURE_RESERVE_SIZE */
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return 0;
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#endif
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}
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int psci_update_dt(void *fdt)
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{
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#ifdef CONFIG_ARMV7_NONSEC
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if (!armv7_boot_nonsec())
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return 0;
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#endif
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#ifndef CONFIG_ARMV7_SECURE_BASE
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/* secure code lives in RAM, keep it alive */
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fdt_add_mem_rsv(fdt, (unsigned long)__secure_start,
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__secure_end - __secure_start);
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#endif
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return fdt_psci(fdt);
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}
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