From: Hongbo Zhang <hongbo.zh...@nxp.com>
This patch adds secure_text, secure_data and secure_stack sections for ARMv8 to
hold PSCI text and data, and it is based on the legacy implementation of ARMv7.
Signed-off-by: Hongbo Zhang <hongbo.zh...@nxp.com>
Reviewed-by: Tom Rini <tr...@konsulko.com>
---
arch/arm/config.mk | 3 ++-
arch/arm/cpu/armv8/Kconfig | 31 +++++++++++++++++++++++
arch/arm/cpu/armv8/u-boot.lds | 57 +++++++++++++++++++++++++++++++++++++++++++
3 files changed, 90 insertions(+), 1 deletion(-)
diff --git a/arch/arm/config.mk b/arch/arm/config.mk
index 542b897..112e334 100644
--- a/arch/arm/config.mk
+++ b/arch/arm/config.mk
@@ -118,7 +118,8 @@ endif
# limit ourselves to the sections we want in the .bin.
ifdef CONFIG_ARM64
-OBJCOPYFLAGS += -j .text -j .rodata -j .data -j .u_boot_list -j .rela.dyn
+OBJCOPYFLAGS += -j .text -j .secure_text -j .secure_data -j .rodata -j .data \
+ -j .u_boot_list -j .rela.dyn
else
OBJCOPYFLAGS += -j .text -j .secure_text -j .secure_data -j .rodata -j .hash \
-j .data -j .got -j .got.plt -j .u_boot_list -j .rel.dyn
diff --git a/arch/arm/cpu/armv8/Kconfig b/arch/arm/cpu/armv8/Kconfig
index cd2d9bb..f2a43b8 100644
--- a/arch/arm/cpu/armv8/Kconfig
+++ b/arch/arm/cpu/armv8/Kconfig
@@ -39,4 +39,35 @@ config PSCI_RESET
Select Y here to make use of PSCI calls for system reset
+config ARMV8_PSCI
+ bool "Enable PSCI support" if EXPERT
+ default n
+ help
+ PSCI is Power State Coordination Interface defined by ARM.
+ The PSCI in U-boot provides a general framework and each platform
+ can implement their own specific PSCI functions.
+ Say Y here to enable PSCI support on ARMv8 platform.
+
+config ARMV8_PSCI_NR_CPUS
+ int "Maximum supported CPUs for PSCI"
+ depends on ARMV8_PSCI
+ default 4
+ help
+ The maximum number of CPUs supported in the PSCI firmware.
+ It is no problem to set a larger value than the number of CPUs in
+ the actual hardware implementation.
+
+if SYS_HAS_ARMV8_SECURE_BASE
+
+config ARMV8_SECURE_BASE
+ hex "Secure address for PSCI image"
+ depends on ARMV8_PSCI
+ help
+ Address for placing the PSCI text, data and stack sections.
+ If not defined, the PSCI sections are placed together with the u-boot
+ but platform can choose to place PSCI code image separately in other
+ places such as some secure RAM built-in SOC etc.
+
+endif
+
endif
diff --git a/arch/arm/cpu/armv8/u-boot.lds b/arch/arm/cpu/armv8/u-boot.lds
index fd15ad5..22195b8 100644
--- a/arch/arm/cpu/armv8/u-boot.lds
+++ b/arch/arm/cpu/armv8/u-boot.lds
@@ -8,11 +8,17 @@
* SPDX-License-Identifier: GPL-2.0+
*/
+#include <config.h>
+#include <asm/psci.h>
+
OUTPUT_FORMAT("elf64-littleaarch64", "elf64-littleaarch64",
"elf64-littleaarch64")
OUTPUT_ARCH(aarch64)
ENTRY(_start)
SECTIONS
{
+#ifdef CONFIG_ARMV8_SECURE_BASE
+ /DISCARD/ : { *(.rela._secure*) }
+#endif
. = 0x00000000;
. = ALIGN(8);
@@ -23,6 +29,57 @@ SECTIONS
*(.text*)
}
+#ifdef CONFIG_ARMV8_PSCI
+ .__secure_start :
+#ifndef CONFIG_ARMV8_SECURE_BASE
+ ALIGN(CONSTANT(COMMONPAGESIZE))
+#endif
+ {
+ KEEP(*(.__secure_start))
+ }
+
+#ifndef CONFIG_ARMV8_SECURE_BASE
+#define CONFIG_ARMV8_SECURE_BASE
+#define __ARMV8_PSCI_STACK_IN_RAM
+#endif
+ .secure_text CONFIG_ARMV8_SECURE_BASE :
+ AT(ADDR(.__secure_start) + SIZEOF(.__secure_start))
+ {
+ *(._secure.text)
+ }
+
+ .secure_data : AT(LOADADDR(.secure_text) + SIZEOF(.secure_text))
+ {
+ *(._secure.data)
+ }
+
+ .secure_stack ALIGN(ADDR(.secure_data) + SIZEOF(.secure_data),
+ CONSTANT(COMMONPAGESIZE)) (NOLOAD) :
+#ifdef __ARMV8_PSCI_STACK_IN_RAM
+ AT(ADDR(.secure_stack))
+#else
+ AT(LOADADDR(.secure_data) + SIZEOF(.secure_data))
+#endif
+ {
+ KEEP(*(.__secure_stack_start))
+
+ . = . + CONFIG_ARMV8_PSCI_NR_CPUS * ARM_PSCI_STACK_SIZE;
+
+ . = ALIGN(CONSTANT(COMMONPAGESIZE));
+
+ KEEP(*(.__secure_stack_end))
+ }
+
+#ifndef __ARMV8_PSCI_STACK_IN_RAM
+ . = LOADADDR(.secure_stack);
+#endif
+
+ .__secure_end : AT(ADDR(.__secure_end)) {
+ KEEP(*(.__secure_end))
+ LONG(0x1d1071c); /* Must output something to reset LMA */
+ }
+#endif
+
. = ALIGN(8);
.rodata : { *(SORT_BY_ALIGNMENT(SORT_BY_NAME(.rodata*))) }
--
2.1.4
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