diff options
| author | Soby Mathew <soby.mathew@arm.com> | 2017-10-05 12:27:33 +0100 |
|---|---|---|
| committer | Soby Mathew <soby.mathew@arm.com> | 2017-10-11 16:57:00 +0100 |
| commit | a22dffc6478da0904c51eefc8e18399e68ff2d9a (patch) | |
| tree | 6c4cb1b4ab74b72a99e07f61e921539802081a76 /include | |
| parent | 7efc390d349f36b01765b020e6e0429cf9d428e3 (diff) | |
| download | arm-trusted-firmware-a22dffc6478da0904c51eefc8e18399e68ff2d9a.tar.gz | |
ARM platforms: Add support for EL3 TZC memory region
Some recent enhancements to EL3 runtime firmware like support for
save and restoring GICv3 register context during system_suspend
necessitates additional data memory for the firmware. This patch
introduces support for creating a TZC secured DDR carveout for use
by ARM reference platforms. A new linker section `el3_tzc_dram` is
created using platform supplied linker script and data marked with
the attribute `arm_el3_tzc_dram` will be placed in this section.
The FVP makefile now defines the `PLAT_EXTRA_LD_SCRIPT` variable to
allow inclusion of the platform linker script by the top level BL31
linker script.
Change-Id: I0e7f4a75a6ac51419c667875ff2677043df1585d
Signed-off-by: Soby Mathew <soby.mathew@arm.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/plat/arm/common/arm_common.ld.S | 28 | ||||
| -rw-r--r-- | include/plat/arm/common/arm_def.h | 19 |
2 files changed, 46 insertions, 1 deletions
diff --git a/include/plat/arm/common/arm_common.ld.S b/include/plat/arm/common/arm_common.ld.S new file mode 100644 index 00000000..478b08c2 --- /dev/null +++ b/include/plat/arm/common/arm_common.ld.S @@ -0,0 +1,28 @@ +/* + * Copyright (c) 2017, ARM Limited and Contributors. All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ +#ifndef __ARM_COMMON_LD_S__ +#define __ARM_COMMON_LD_S__ + +MEMORY { + EL3_SEC_DRAM (rw): ORIGIN = ARM_EL3_TZC_DRAM1_BASE, LENGTH = ARM_EL3_TZC_DRAM1_SIZE +} + +SECTIONS +{ + . = ARM_EL3_TZC_DRAM1_BASE; + ASSERT(. == ALIGN(4096), + "ARM_EL3_TZC_DRAM_BASE address is not aligned on a page boundary.") + el3_tzc_dram (NOLOAD) : ALIGN(4096) { + __EL3_SEC_DRAM_START__ = .; + *(arm_el3_tzc_dram) + __EL3_SEC_DRAM_UNALIGNED_END__ = .; + + . = NEXT(4096); + __EL3_SEC_DRAM_END__ = .; + } >EL3_SEC_DRAM +} + +#endif /* __ARM_COMMON_LD_S__ */ diff --git a/include/plat/arm/common/arm_def.h b/include/plat/arm/common/arm_def.h index dbf102b8..8ae820a9 100644 --- a/include/plat/arm/common/arm_def.h +++ b/include/plat/arm/common/arm_def.h @@ -75,11 +75,23 @@ #define ARM_SCP_TZC_DRAM1_END (ARM_SCP_TZC_DRAM1_BASE + \ ARM_SCP_TZC_DRAM1_SIZE - 1) +/* + * Define a 2MB region within the TZC secured DRAM for use by EL3 runtime + * firmware. This region is meant to be NOLOAD and will not be zero + * initialized. Data sections with the attribute `arm_el3_tzc_dram` will be + * placed here. + */ +#define ARM_EL3_TZC_DRAM1_BASE (ARM_SCP_TZC_DRAM1_BASE - ARM_EL3_TZC_DRAM1_SIZE) +#define ARM_EL3_TZC_DRAM1_SIZE ULL(0x00200000) /* 2 MB */ +#define ARM_EL3_TZC_DRAM1_END (ARM_EL3_TZC_DRAM1_BASE + \ + ARM_EL3_TZC_DRAM1_SIZE - 1) + #define ARM_AP_TZC_DRAM1_BASE (ARM_DRAM1_BASE + \ ARM_DRAM1_SIZE - \ ARM_TZC_DRAM1_SIZE) #define ARM_AP_TZC_DRAM1_SIZE (ARM_TZC_DRAM1_SIZE - \ - ARM_SCP_TZC_DRAM1_SIZE) + (ARM_SCP_TZC_DRAM1_SIZE + \ + ARM_EL3_TZC_DRAM1_SIZE)) #define ARM_AP_TZC_DRAM1_END (ARM_AP_TZC_DRAM1_BASE + \ ARM_AP_TZC_DRAM1_SIZE - 1) @@ -196,6 +208,11 @@ MT_MEMORY | MT_RW | MT_SECURE) #endif +#define ARM_MAP_EL3_TZC_DRAM MAP_REGION_FLAT( \ + ARM_EL3_TZC_DRAM1_BASE, \ + ARM_EL3_TZC_DRAM1_SIZE, \ + MT_MEMORY | MT_RW | MT_SECURE) + /* * The number of regions like RO(code), coherent and data required by * different BL stages which need to be mapped in the MMU. |