[U-Boot] [PATCH v5 05/11] ARM: HYP/non-sec: add separate section for secure code

[Ian Campbell]

From: Marc Zyngier <marc.zyngier at arm.com>

In anticipation of refactoring the HYP/non-secure code to run
from secure RAM, add a new linker section that will contain that
code.

Nothing is using it just yet.

Signed-off-by: Marc Zyngier <marc.zyngier at arm.com>
Acked-by: Ian Campbell <ijc at hellion.org.uk>
---
v5: [ijc] s/OBJCFLAGS/OBJCOPYFLAGS/
---
 arch/arm/config.mk      |  2 +-
 arch/arm/cpu/u-boot.lds | 30 ++++++++++++++++++++++++++++++
 arch/arm/lib/sections.c |  2 ++
 3 files changed, 33 insertions(+), 1 deletion(-)

diff --git a/arch/arm/config.mk b/arch/arm/config.mk
index 66ecc2e..2bdfca5 100644
--- a/arch/arm/config.mk
+++ b/arch/arm/config.mk
@@ -113,7 +113,7 @@ endif
 ifdef CONFIG_ARM64
 OBJCOPYFLAGS += -j .text -j .rodata -j .data -j .u_boot_list -j .rela.dyn
 else
-OBJCOPYFLAGS += -j .text -j .rodata -j .hash -j .data -j .got.plt -j .u_boot_list -j .rel.dyn
+OBJCOPYFLAGS += -j .text -j .secure_text -j .rodata -j .hash -j .data -j .got.plt -j .u_boot_list -j .rel.dyn
 endif
 
 ifneq ($(CONFIG_IMX_CONFIG),)
diff --git a/arch/arm/cpu/u-boot.lds b/arch/arm/cpu/u-boot.lds
index a7728e0..7336162 100644
--- a/arch/arm/cpu/u-boot.lds
+++ b/arch/arm/cpu/u-boot.lds
@@ -7,6 +7,8 @@
  * SPDX-License-Identifier:	GPL-2.0+
  */
 
+#include <config.h>
+
 OUTPUT_FORMAT("elf32-littlearm", "elf32-littlearm", "elf32-littlearm")
 OUTPUT_ARCH(arm)
 ENTRY(_start)
@@ -23,6 +25,34 @@ SECTIONS
 		*(.text*)
 	}
 
+#if defined(CONFIG_ARMV7_NONSEC) || defined(CONFIG_ARMV7_VIRT) || defined(CONFIG_ARMV7_PSCI)
+
+#ifndef CONFIG_ARMV7_SECURE_BASE
+#define CONFIG_ARMV7_SECURE_BASE
+#endif
+
+	.__secure_start : {
+		. = ALIGN(0x1000);
+		*(.__secure_start)
+	}
+
+	.secure_text CONFIG_ARMV7_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(4);
 	.rodata : { *(SORT_BY_ALIGNMENT(SORT_BY_NAME(.rodata*))) }
 
diff --git a/arch/arm/lib/sections.c b/arch/arm/lib/sections.c
index 5b30bcb..a1205c3 100644
--- a/arch/arm/lib/sections.c
+++ b/arch/arm/lib/sections.c
@@ -25,4 +25,6 @@ char __image_copy_start[0] __attribute__((section(".__image_copy_start")));
 char __image_copy_end[0] __attribute__((section(".__image_copy_end")));
 char __rel_dyn_start[0] __attribute__((section(".__rel_dyn_start")));
 char __rel_dyn_end[0] __attribute__((section(".__rel_dyn_end")));
+char __secure_start[0] __attribute__((section(".__secure_start")));
+char __secure_end[0] __attribute__((section(".__secure_end")));
 char _end[0] __attribute__((section(".__end")));
-- 
2.0.1