commit 0824b4520fbd4bf0e2b04b651c98cf71d0d9a565
author Jiafei Pan <Jiafei.Pan@nxp.com> Thu Feb 24 10:47:33 2022 +0800
committer Jiafei Pan <Jiafei.Pan@nxp.com> Sun Mar 27 23:24:24 2022 +0800
tree 64d2a54478598d5a645f3fd140a06e35fc76e2c2
parent f55394882ac916a0147a318e07495402bae9a26f

feat(bl2): add support to separate no-loadable sections

Add new options SEPARATE_BL2_NOLOAD_REGION to separate no-loadable
sections (.bss, stack, page tables) to a ram region specified
by BL2_NOLOAD_START and BL2_NOLOAD_LIMIT.

Signed-off-by: Jiafei Pan <Jiafei.Pan@nxp.com>
Change-Id: I844ee0fc405474af0aff978d292c826fbe0a82fd

bl2/bl2_el3.ld.S

diff --git a/bl2/bl2_el3.ld.S b/bl2/bl2_el3.ld.S
index bc1794c..6aa7afd 100644
--- a/bl2/bl2_el3.ld.S
+++ b/bl2/bl2_el3.ld.S
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017-2020, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2017-2022, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -17,6 +17,11 @@
     RAM (rwx): ORIGIN = BL2_RW_BASE, LENGTH = BL2_RW_LIMIT - BL2_RW_BASE
 #else
     RAM (rwx): ORIGIN = BL2_BASE, LENGTH = BL2_LIMIT - BL2_BASE
+#if SEPARATE_BL2_NOLOAD_REGION
+    RAM_NOLOAD (rw!a): ORIGIN = BL2_NOLOAD_START, LENGTH = BL2_NOLOAD_LIMIT - BL2_NOLOAD_START
+#else
+#define RAM_NOLOAD RAM
+#endif
 #endif
 }
 
@@ -106,9 +111,18 @@
     __DATA_RAM_END__ = __DATA_END__;
 
     RELA_SECTION >RAM
-    STACK_SECTION >RAM
-    BSS_SECTION >RAM
-    XLAT_TABLE_SECTION >RAM
+#if SEPARATE_BL2_NOLOAD_REGION
+    SAVED_ADDR = .;
+    . = BL2_NOLOAD_START;
+    __BL2_NOLOAD_START__ = .;
+#endif
+    STACK_SECTION >RAM_NOLOAD
+    BSS_SECTION >RAM_NOLOAD
+    XLAT_TABLE_SECTION >RAM_NOLOAD
+#if SEPARATE_BL2_NOLOAD_REGION
+    __BL2_NOLOAD_END__ = .;
+    . = SAVED_ADDR;
+#endif
 
 #if USE_COHERENT_MEM
     /*