From 0d848afe117ac3e31b9d57b65553ff18ef9d288f Mon Sep 17 00:00:00 2001
From: Max Filippov <jcmvbkbc@gmail.com>
Date: Fri, 16 Oct 2015 18:30:37 +0300
Subject: [PATCH] xtensa: drop unused sections and remapped reset handlers

There are no .bootstrap or .ResetVector.text sections linked to the
vmlinux image, drop these sections from vmlinux.ld.S. Drop
RESET_VECTOR_VADDR definition only used for .ResetVector.text.

Drop remapped copies of primary and secondary reset vectors, as modern
gdb don't have problems stepping through instructions at arbitrary
locations. Drop corresponding sections from the corresponding linker
scripts.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
---
 arch/xtensa/boot/boot-elf/boot.lds.S  | 13 -------------
 arch/xtensa/boot/boot-elf/bootstrap.S | 28 ---------------------------
 arch/xtensa/include/asm/vectors.h     |  4 ----
 arch/xtensa/kernel/mxhead.S           | 23 ----------------------
 arch/xtensa/kernel/vmlinux.lds.S      | 25 ------------------------
 5 files changed, 93 deletions(-)

diff --git a/arch/xtensa/boot/boot-elf/boot.lds.S b/arch/xtensa/boot/boot-elf/boot.lds.S
index 958b33af96b7..e54f2c9df63a 100644
--- a/arch/xtensa/boot/boot-elf/boot.lds.S
+++ b/arch/xtensa/boot/boot-elf/boot.lds.S
@@ -40,17 +40,4 @@ SECTIONS
 		*(.bss)
 		__bss_end = .;
 	}
-
-#ifdef CONFIG_MMU
-	/*
-	 * This is a remapped copy of the Reset Vector Code.
-	 * It keeps gdb in sync with the PC after switching
-	 * to the temporary mapping used while setting up
-	 * the V2 MMU mappings for Linux.
-	 */
-	.ResetVector.remapped_text 0x46000000 (INFO):
-	{
-		*(.ResetVector.remapped_text)
-	}
-#endif
 }
diff --git a/arch/xtensa/boot/boot-elf/bootstrap.S b/arch/xtensa/boot/boot-elf/bootstrap.S
index 9341a5750694..e6bf313613cf 100644
--- a/arch/xtensa/boot/boot-elf/bootstrap.S
+++ b/arch/xtensa/boot/boot-elf/bootstrap.S
@@ -58,8 +58,6 @@ _SetupMMU:
 	wsr	a0, ps
 	rsync
 
-	Offset = _SetupMMU - _ResetVector
-
 #ifndef CONFIG_INITIALIZE_XTENSA_MMU_INSIDE_VMLINUX
 	initialize_mmu
 #endif
@@ -74,29 +72,3 @@ reset:
 	movi	a3, 0
 	movi	a4, 0
 	jx      a0
-
-#ifdef CONFIG_MMU
-	.align 4
-
-	.section	.ResetVector.remapped_text, "x"
-	.global         _RemappedResetVector
-
-	/* Do org before literals */
-	.org 0
-
-_RemappedResetVector:
-	.begin  no-absolute-literals
-	.literal_position
-
-	_j	_RemappedSetupMMU
-
-	/* Position Remapped code at the same location as the original code */
-	. = _RemappedResetVector + Offset
-
-_RemappedSetupMMU:
-#ifndef CONFIG_INITIALIZE_XTENSA_MMU_INSIDE_VMLINUX
-	initialize_mmu
-#endif
-
-	.end    no-absolute-literals
-#endif
diff --git a/arch/xtensa/include/asm/vectors.h b/arch/xtensa/include/asm/vectors.h
index d3e6d2eff783..288c776736d3 100644
--- a/arch/xtensa/include/asm/vectors.h
+++ b/arch/xtensa/include/asm/vectors.h
@@ -85,10 +85,6 @@ static inline unsigned long xtensa_get_kio_paddr(void)
 /* Used to set VECBASE register */
 #define VECBASE_RESET_VADDR		VIRTUAL_MEMORY_ADDRESS
 
-#define RESET_VECTOR_VECOFS		(XCHAL_RESET_VECTOR_VADDR - \
-						VECBASE_RESET_VADDR)
-#define RESET_VECTOR_VADDR		XC_VADDR(RESET_VECTOR_VECOFS)
-
 #if defined(XCHAL_HAVE_VECBASE) && XCHAL_HAVE_VECBASE
 
 #define USER_VECTOR_VADDR		XC_VADDR(XCHAL_USER_VECOFS)
diff --git a/arch/xtensa/kernel/mxhead.S b/arch/xtensa/kernel/mxhead.S
index 77a161a112c5..9f3843742726 100644
--- a/arch/xtensa/kernel/mxhead.S
+++ b/arch/xtensa/kernel/mxhead.S
@@ -48,8 +48,6 @@ _SetupOCD:
 	rsync
 
 _SetupMMU:
-	Offset = _SetupMMU - _SecondaryResetVector
-
 #ifdef CONFIG_INITIALIZE_XTENSA_MMU_INSIDE_VMLINUX
 	initialize_mmu
 #endif
@@ -62,24 +60,3 @@ _SetupMMU:
 	jx	a3
 
 	.end    no-absolute-literals
-
-
-	.section 	.SecondaryResetVector.remapped_text, "ax"
-	.global         _RemappedSecondaryResetVector
-
-	.org 0                                  # Need to do org before literals
-
-_RemappedSecondaryResetVector:
-	.begin  no-absolute-literals
-	.literal_position
-
-	_j      _RemappedSetupMMU
-	. = _RemappedSecondaryResetVector + Offset
-
-_RemappedSetupMMU:
-
-#ifdef CONFIG_INITIALIZE_XTENSA_MMU_INSIDE_VMLINUX
-	initialize_mmu
-#endif
-
-	.end    no-absolute-literals
diff --git a/arch/xtensa/kernel/vmlinux.lds.S b/arch/xtensa/kernel/vmlinux.lds.S
index d66cd408be13..c417cbe4ec87 100644
--- a/arch/xtensa/kernel/vmlinux.lds.S
+++ b/arch/xtensa/kernel/vmlinux.lds.S
@@ -298,31 +298,6 @@ SECTIONS
 
   _end = .;
 
-  /* only used by the boot loader  */
-
-  . = ALIGN(0x10);
-  .bootstrap : { *(.bootstrap.literal .bootstrap.text .bootstrap.data) }
-
-  .ResetVector.text RESET_VECTOR_VADDR :
-  {
-    *(.ResetVector.text)
-  }
-
-
-  /*
-   * This is a remapped copy of the Secondary Reset Vector Code.
-   * It keeps gdb in sync with the PC after switching
-   * to the temporary mapping used while setting up
-   * the V2 MMU mappings for Linux.
-   *
-   * Only debug information about this section is put in the kernel image.
-   */
-  .SecondaryResetVector.remapped_text 0x46000000 (INFO):
-  {
-	*(.SecondaryResetVector.remapped_text)
-  }
-
-
   .xt.lit : { *(.xt.lit) }
   .xt.prop : { *(.xt.prop) }