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A Secure Partition is a software execution environment instantiated in S-EL0 that can be used to implement simple management and security services. Since S-EL0 is an unprivileged exception level, a Secure Partition relies on privileged firmware e.g. ARM Trusted Firmware to be granted access to system and processor resources. Essentially, it is a software sandbox that runs under the control of privileged software in the Secure World and accesses the following system resources: - Memory and device regions in the system address map. - PE system registers. - A range of asynchronous exceptions e.g. interrupts. - A range of synchronous exceptions e.g. SMC function identifiers. A Secure Partition enables privileged firmware to implement only the absolutely essential secure services in EL3 and instantiate the rest in a partition. Since the partition executes in S-EL0, its implementation cannot be overly complex. The component in ARM Trusted Firmware responsible for managing a Secure Partition is called the Secure Partition Manager (SPM). The SPM is responsible for the following: - Validating and allocating resources requested by a Secure Partition. - Implementing a well defined interface that is used for initialising a Secure Partition. - Implementing a well defined interface that is used by the normal world and other secure services for accessing the services exported by a Secure Partition. - Implementing a well defined interface that is used by a Secure Partition to fulfil service requests. - Instantiating the software execution environment required by a Secure Partition to fulfil a service request. Change-Id: I6f7862d6bba8732db5b73f54e789d717a35e802f Co-authored-by: Douglas Raillard <douglas.raillard@arm.com> Co-authored-by: Sandrine Bailleux <sandrine.bailleux@arm.com> Co-authored-by: Achin Gupta <achin.gupta@arm.com> Co-authored-by: Antonio Nino Diaz <antonio.ninodiaz@arm.com> Signed-off-by: Antonio Nino Diaz <antonio.ninodiaz@arm.com>
29 lines
760 B
C
29 lines
760 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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#ifndef __SPM_SHIM_PRIVATE__
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#define __SPM_SHIM_PRIVATE__
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#include <types.h>
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/* Assembly source */
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extern uintptr_t spm_shim_exceptions_ptr;
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/* Linker symbols */
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extern uintptr_t __SPM_SHIM_EXCEPTIONS_START__;
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extern uintptr_t __SPM_SHIM_EXCEPTIONS_END__;
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/* Definitions */
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#define SPM_SHIM_EXCEPTIONS_PTR (uintptr_t)(&spm_shim_exceptions_ptr)
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#define SPM_SHIM_EXCEPTIONS_START \
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(uintptr_t)(&__SPM_SHIM_EXCEPTIONS_START__)
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#define SPM_SHIM_EXCEPTIONS_END \
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(uintptr_t)(&__SPM_SHIM_EXCEPTIONS_END__)
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#define SPM_SHIM_EXCEPTIONS_SIZE \
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(SPM_SHIM_EXCEPTIONS_END - SPM_SHIM_EXCEPTIONS_START)
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#endif /* __SPM_SHIM_PRIVATE__ */
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