[U-Boot] [PATCH 4/8] ARMv8: PSCI: Add linker section to hold PSCI code

[Arnab Basu]

A separate linker section makes it possible to keep this code either
in DDR or in some secure memory location provided specifically for the
purpose.

So far no one is using this section.

Signed-off-by: Arnab Basu <arnab.basu at freescale.com>
Reviewed-by: Bhupesh Sharma <bhupesh.sharma at freescale.com>
Cc: Marc Zyngier <marc.zyngier at arm.com>
---
 arch/arm/config.mk            |    2 +-
 arch/arm/cpu/armv8/u-boot.lds |   30 ++++++++++++++++++++++++++++++
 2 files changed, 31 insertions(+), 1 deletions(-)

diff --git a/arch/arm/config.mk b/arch/arm/config.mk
index c339e6d..9272e9c 100644
--- a/arch/arm/config.mk
+++ b/arch/arm/config.mk
@@ -111,7 +111,7 @@ 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 .rodata -j .data -j .u_boot_list -j .rela.dyn
 else
 OBJCOPYFLAGS += -j .text -j .secure_text -j .rodata -j .hash -j .data -j .got.plt -j .u_boot_list -j .rel.dyn
 endif
diff --git a/arch/arm/cpu/armv8/u-boot.lds b/arch/arm/cpu/armv8/u-boot.lds
index 4c12222..bd95fff 100644
--- a/arch/arm/cpu/armv8/u-boot.lds
+++ b/arch/arm/cpu/armv8/u-boot.lds
@@ -8,6 +8,8 @@
  * SPDX-License-Identifier:	GPL-2.0+
  */
 
+#include <config.h>
+
 OUTPUT_FORMAT("elf64-littleaarch64", "elf64-littleaarch64", "elf64-littleaarch64")
 OUTPUT_ARCH(aarch64)
 ENTRY(_start)
@@ -23,6 +25,34 @@ SECTIONS
 		*(.text*)
 	}
 
+#ifdef CONFIG_ARMV8_PSCI
+
+#ifndef CONFIG_ARMV8_SECURE_BASE
+#define CONFIG_ARMV8_SECURE_BASE
+#endif
+
+	.__secure_start : {
+		. = ALIGN(0x1000);
+		*(.__secure_start)
+	}
+
+	.secure_text CONFIG_ARMV8_SECURE_BASE :
+		AT(ADDR(.__secure_start) + SIZEOF(.__secure_start))
+	{
+		*(._secure.text)
+	}
+
+	. = LOADADDR(.__secure_start) +
+		SIZEOF(.__secure_start) +
+		SIZEOF(.secure_text);
+
+	__secure_end_lma = .;
+	.__secure_end : AT(__secure_end_lma) {
+		*(.__secure_end)
+		LONG(0x1d1071c);	/* Must output something to reset LMA */
+	}
+#endif
+
 	. = ALIGN(8);
 	.rodata : { *(SORT_BY_ALIGNMENT(SORT_BY_NAME(.rodata*))) }
 
-- 
1.7.7.4