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d4c596be87
This patch adds the generic code that links the psci smc handler with the platform function that implements the mem_protect and mem_check_range functionalities. These functions are optional APIs added in PSCI v1.1 (ARM DEN022D). Change-Id: I3bac1307a5ce2c7a196ace76db8317e8d8c8bb3f Signed-off-by: Roberto Vargas <roberto.vargas@arm.com>
38 lines
858 B
C
38 lines
858 B
C
/*
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* Copyright (c) 2017, 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 <assert.h>
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#include <limits.h>
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#include <utils.h>
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#include "psci_private.h"
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int psci_mem_protect(unsigned int enable)
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{
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int val;
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assert(psci_plat_pm_ops->read_mem_protect);
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assert(psci_plat_pm_ops->write_mem_protect);
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if (psci_plat_pm_ops->read_mem_protect(&val) < 0)
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return PSCI_E_NOT_SUPPORTED;
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if (psci_plat_pm_ops->write_mem_protect(enable) < 0)
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return PSCI_E_NOT_SUPPORTED;
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return val != 0;
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}
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int psci_mem_chk_range(uintptr_t base, u_register_t length)
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{
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int ret;
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assert(psci_plat_pm_ops->mem_protect_chk);
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if (length == 0 || check_uptr_overflow(base, length-1))
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return PSCI_E_DENIED;
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ret = psci_plat_pm_ops->mem_protect_chk(base, length);
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return (ret < 0) ? PSCI_E_DENIED : PSCI_E_SUCCESS;
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}
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