diff options
| author | Daniel Allred <d-allred@ti.com> | 2016-09-02 00:40:21 -0500 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2016-10-02 08:09:55 -0400 |
| commit | 6d132b2b09b476131855b9350ccad360e065d3fc (patch) | |
| tree | 73d6ace6f93be12726643dee93a167cd6ee2d8c7 /arch/arm/include | |
| parent | 4c854b61994f2f785639cd10c7acef6a3b41170e (diff) | |
arm: omap5: secure API for EMIF memory reservations
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>
Diffstat (limited to 'arch/arm/include')
| -rw-r--r-- | arch/arm/include/asm/omap_sec_common.h | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/arch/arm/include/asm/omap_sec_common.h b/arch/arm/include/asm/omap_sec_common.h index 842f2af8d1..4bde93f804 100644 --- a/arch/arm/include/asm/omap_sec_common.h +++ b/arch/arm/include/asm/omap_sec_common.h @@ -27,4 +27,28 @@ u32 secure_rom_call(u32 service, u32 proc_id, u32 flag, ...); */ int secure_boot_verify_image(void **p_image, size_t *p_size); +/* + * Invoke a secure HAL API that allows configuration of the external memory + * firewall regions. + */ +int secure_emif_firewall_setup(uint8_t region_num, uint32_t start_addr, + uint32_t size, uint32_t access_perm, + uint32_t initiator_perm); + +/* + * Invoke a secure HAL API on high-secure (HS) device variants that reserves a + * region of external memory for secure world use, and protects it using memory + * firewalls that prevent public world access. This API is intended to setaside + * memory that will be used for a secure world OS/TEE. + */ +int secure_emif_reserve(void); + +/* + * Invoke a secure HAL API to lock the external memory firewall configurations. + * After this API is called, none of the HAL APIs for configuring the that + * firewall will be usable (calls to those APIs will return failure and have + * no effect). + */ +int secure_emif_firewall_lock(void); + #endif /* _OMAP_SEC_COMMON_H_ */ |