GK SDK 源码库: XMIPCLinuxV100R005C00SPC030 (kernel/tools/open_source excluded)

source/trusted-firmware/trusted-firmware-a-2.8/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;
+}