diff options
Diffstat (limited to 'lib/psci/psci_mem_protect.c')
-rw-r--r-- | lib/psci/psci_mem_protect.c | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/lib/psci/psci_mem_protect.c b/lib/psci/psci_mem_protect.c new file mode 100644 index 00000000..fca84e90 --- /dev/null +++ b/lib/psci/psci_mem_protect.c @@ -0,0 +1,38 @@ +/* + * Copyright (c) 2017, ARM Limited and Contributors. All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +#include <assert.h> +#include <limits.h> +#include <utils.h> +#include "psci_private.h" + +int psci_mem_protect(unsigned int enable) +{ + int val; + + assert(psci_plat_pm_ops->read_mem_protect); + assert(psci_plat_pm_ops->write_mem_protect); + + if (psci_plat_pm_ops->read_mem_protect(&val) < 0) + return PSCI_E_NOT_SUPPORTED; + if (psci_plat_pm_ops->write_mem_protect(enable) < 0) + return PSCI_E_NOT_SUPPORTED; + + return val != 0; +} + +int psci_mem_chk_range(uintptr_t base, u_register_t length) +{ + int ret; + + assert(psci_plat_pm_ops->mem_protect_chk); + + if (length == 0 || check_uptr_overflow(base, length-1)) + return PSCI_E_DENIED; + + ret = psci_plat_pm_ops->mem_protect_chk(base, length); + return (ret < 0) ? PSCI_E_DENIED : PSCI_E_SUCCESS; +} |