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https://github.com/AsahiLinux/u-boot
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6d132b2b09
Create a few public APIs which rely on secure world ROM/HAL APIs for their implementation. These are intended to be used to reserve a portion of the EMIF memory and configure hardware firewalls around that region to prevent public code from manipulating or interfering with that memory. Signed-off-by: Daniel Allred <d-allred@ti.com> Reviewed-by: Tom Rini <trini@konsulko.com>
54 lines
1.8 KiB
C
54 lines
1.8 KiB
C
/*
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* (C) Copyright 2016
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* Texas Instruments, <www.ti.com>
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*
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* Andreas Dannenberg <dannenberg@ti.com>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#ifndef _OMAP_SEC_COMMON_H_
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#define _OMAP_SEC_COMMON_H_
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#include <common.h>
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/*
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* Invoke secure ROM API on high-security (HS) device variants. It formats
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* the variable argument list into the format expected by the ROM code before
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* triggering the actual low-level smc entry.
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*/
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u32 secure_rom_call(u32 service, u32 proc_id, u32 flag, ...);
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/*
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* Invoke a secure ROM API on high-secure (HS) device variants that can be used
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* to verify a secure blob by authenticating and optionally decrypting it. The
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* exact operation performed depends on how the certificate that was embedded
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* into the blob during the signing/encryption step when the secure blob was
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* first created.
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*/
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int secure_boot_verify_image(void **p_image, size_t *p_size);
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/*
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* Invoke a secure HAL API that allows configuration of the external memory
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* firewall regions.
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*/
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int secure_emif_firewall_setup(uint8_t region_num, uint32_t start_addr,
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uint32_t size, uint32_t access_perm,
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uint32_t initiator_perm);
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/*
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* Invoke a secure HAL API on high-secure (HS) device variants that reserves a
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* region of external memory for secure world use, and protects it using memory
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* firewalls that prevent public world access. This API is intended to setaside
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* memory that will be used for a secure world OS/TEE.
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*/
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int secure_emif_reserve(void);
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/*
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* Invoke a secure HAL API to lock the external memory firewall configurations.
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* After this API is called, none of the HAL APIs for configuring the that
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* firewall will be usable (calls to those APIs will return failure and have
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* no effect).
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*/
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int secure_emif_firewall_lock(void);
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#endif /* _OMAP_SEC_COMMON_H_ */
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