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2fccb22804
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>
55 lines
1.6 KiB
C
55 lines
1.6 KiB
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 __PARAM_HEADER_H__
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#define __PARAM_HEADER_H__
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/* Param header types */
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#define PARAM_EP 0x01
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#define PARAM_IMAGE_BINARY 0x02
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#define PARAM_BL31 0x03
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#define PARAM_BL_LOAD_INFO 0x04
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#define PARAM_BL_PARAMS 0x05
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#define PARAM_PSCI_LIB_ARGS 0x06
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#define PARAM_SP_IMAGE_BOOT_INFO 0x07
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/* Param header version */
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#define VERSION_1 0x01
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#define VERSION_2 0x02
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#define SET_PARAM_HEAD(_p, _type, _ver, _attr) do { \
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(_p)->h.type = (uint8_t)(_type); \
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(_p)->h.version = (uint8_t)(_ver); \
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(_p)->h.size = (uint16_t)sizeof(*_p); \
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(_p)->h.attr = (uint32_t)(_attr) ; \
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} while (0)
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/* Following is used for populating structure members statically. */
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#define SET_STATIC_PARAM_HEAD(_p, _type, _ver, _p_type, _attr) \
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._p.h.type = (uint8_t)(_type), \
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._p.h.version = (uint8_t)(_ver), \
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._p.h.size = (uint16_t)sizeof(_p_type), \
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._p.h.attr = (uint32_t)(_attr)
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#ifndef __ASSEMBLY__
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#include <types.h>
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/***************************************************************************
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* This structure provides version information and the size of the
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* structure, attributes for the structure it represents
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***************************************************************************/
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typedef struct param_header {
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uint8_t type; /* type of the structure */
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uint8_t version; /* version of this structure */
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uint16_t size; /* size of this structure in bytes */
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uint32_t attr; /* attributes: unused bits SBZ */
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} param_header_t;
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#endif /*__ASSEMBLY__*/
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#endif /* __PARAM_HEADER_H__ */
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