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xtensa: drop unused sections and remapped reset handlers

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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>
This commit is contained in:
Max Filippov 2015-10-16 18:30:37 +03:00
parent ab45fb1450
commit 0d848afe11
5 changed files with 0 additions and 93 deletions
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13
arch/xtensa/boot/boot-elf/boot.lds.S
View File

@ -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
}

28
arch/xtensa/boot/boot-elf/bootstrap.S
View File

@ -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

4
arch/xtensa/include/asm/vectors.h
View File

@ -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)

23
arch/xtensa/kernel/mxhead.S
View File

@ -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

25
arch/xtensa/kernel/vmlinux.lds.S
View File

@ -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) }