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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-28 09:13:47 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-28 09:13:47 +0000 |
commit | 102b0d2daa97dae68d3eed54d8fe37a9cc38a892 (patch) | |
tree | bcf648efac40ca6139842707f0eba5a4496a6dd2 /lib/psci/psci_mem_protect.c | |
parent | Initial commit. (diff) | |
download | arm-trusted-firmware-upstream.tar.xz arm-trusted-firmware-upstream.zip |
Adding upstream version 2.8.0+dfsg.upstream/2.8.0+dfsgupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'lib/psci/psci_mem_protect.c')
-rw-r--r-- | lib/psci/psci_mem_protect.c | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/lib/psci/psci_mem_protect.c b/lib/psci/psci_mem_protect.c new file mode 100644 index 0000000..481051f --- /dev/null +++ b/lib/psci/psci_mem_protect.c @@ -0,0 +1,41 @@ +/* + * Copyright (c) 2017-2018, ARM Limited and Contributors. All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +#include <assert.h> +#include <limits.h> + +#include <lib/utils.h> + +#include "psci_private.h" + +u_register_t psci_mem_protect(unsigned int enable) +{ + int val; + + assert(psci_plat_pm_ops->read_mem_protect != NULL); + assert(psci_plat_pm_ops->write_mem_protect != NULL); + + if (psci_plat_pm_ops->read_mem_protect(&val) < 0) + return (u_register_t) PSCI_E_NOT_SUPPORTED; + if (psci_plat_pm_ops->write_mem_protect(enable) < 0) + return (u_register_t) PSCI_E_NOT_SUPPORTED; + + return (val != 0) ? 1U : 0U; +} + +u_register_t psci_mem_chk_range(uintptr_t base, u_register_t length) +{ + int ret; + + assert(psci_plat_pm_ops->mem_protect_chk != NULL); + + if ((length == 0U) || check_uptr_overflow(base, length - 1U)) + return (u_register_t) PSCI_E_DENIED; + + ret = psci_plat_pm_ops->mem_protect_chk(base, length); + return (ret < 0) ? + (u_register_t) PSCI_E_DENIED : (u_register_t) PSCI_E_SUCCESS; +} |