mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-15 15:04:27 +08:00
b46dcfa378
Currently code for exception/IRQ vectors is stored in kernel image as initialization data and is copied to its working addresses during startup. It doesn't always make sense. In many cases vectors location can be automatically decided at kernel link time and code can be placed right there. This is especially useful for XIP kernel. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
378 lines
10 KiB
ArmAsm
378 lines
10 KiB
ArmAsm
/*
|
|
* arch/xtensa/kernel/vmlinux.lds.S
|
|
*
|
|
* Xtensa linker script
|
|
*
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
* License. See the file "COPYING" in the main directory of this archive
|
|
* for more details.
|
|
*
|
|
* Copyright (C) 2001 - 2008 Tensilica Inc.
|
|
*
|
|
* Chris Zankel <chris@zankel.net>
|
|
* Marc Gauthier <marc@tensilica.com, marc@alumni.uwaterloo.ca>
|
|
* Joe Taylor <joe@tensilica.com, joetylr@yahoo.com>
|
|
*/
|
|
|
|
#include <asm-generic/vmlinux.lds.h>
|
|
#include <asm/page.h>
|
|
#include <asm/thread_info.h>
|
|
|
|
#include <asm/vectors.h>
|
|
#include <variant/core.h>
|
|
#include <platform/hardware.h>
|
|
OUTPUT_ARCH(xtensa)
|
|
ENTRY(_start)
|
|
|
|
#ifdef __XTENSA_EB__
|
|
jiffies = jiffies_64 + 4;
|
|
#else
|
|
jiffies = jiffies_64;
|
|
#endif
|
|
|
|
/* Note: In the following macros, it would be nice to specify only the
|
|
vector name and section kind and construct "sym" and "section" using
|
|
CPP concatenation, but that does not work reliably. Concatenating a
|
|
string with "." produces an invalid token. CPP will not print a
|
|
warning because it thinks this is an assembly file, but it leaves
|
|
them as multiple tokens and there may or may not be whitespace
|
|
between them. */
|
|
|
|
/* Macro for a relocation entry */
|
|
|
|
#define RELOCATE_ENTRY(sym, section) \
|
|
LONG(sym ## _start); \
|
|
LONG(sym ## _end); \
|
|
LONG(LOADADDR(section))
|
|
|
|
/* Macro to define a section for a vector.
|
|
*
|
|
* Use of the MIN function catches the types of errors illustrated in
|
|
* the following example:
|
|
*
|
|
* Assume the section .DoubleExceptionVector.literal is completely
|
|
* full. Then a programmer adds code to .DoubleExceptionVector.text
|
|
* that produces another literal. The final literal position will
|
|
* overlay onto the first word of the adjacent code section
|
|
* .DoubleExceptionVector.text. (In practice, the literals will
|
|
* overwrite the code, and the first few instructions will be
|
|
* garbage.)
|
|
*/
|
|
|
|
#ifdef CONFIG_VECTORS_OFFSET
|
|
#define SECTION_VECTOR(sym, section, addr, max_prevsec_size, prevsec) \
|
|
section addr : AT((MIN(LOADADDR(prevsec) + max_prevsec_size, \
|
|
LOADADDR(prevsec) + SIZEOF(prevsec)) + 3) & ~ 3) \
|
|
{ \
|
|
. = ALIGN(4); \
|
|
sym ## _start = ABSOLUTE(.); \
|
|
*(section) \
|
|
sym ## _end = ABSOLUTE(.); \
|
|
}
|
|
#else
|
|
#define SECTION_VECTOR(section, addr) \
|
|
. = addr; \
|
|
*(section)
|
|
#endif
|
|
|
|
/*
|
|
* Mapping of input sections to output sections when linking.
|
|
*/
|
|
|
|
SECTIONS
|
|
{
|
|
. = KERNELOFFSET;
|
|
/* .text section */
|
|
|
|
_text = .;
|
|
_stext = .;
|
|
|
|
.text :
|
|
{
|
|
/* The HEAD_TEXT section must be the first section! */
|
|
HEAD_TEXT
|
|
|
|
#ifndef CONFIG_VECTORS_OFFSET
|
|
. = ALIGN(PAGE_SIZE);
|
|
_vecbase = .;
|
|
|
|
SECTION_VECTOR (.WindowVectors.text, WINDOW_VECTORS_VADDR)
|
|
#if XCHAL_EXCM_LEVEL >= 2
|
|
SECTION_VECTOR (.Level2InterruptVector.text, INTLEVEL2_VECTOR_VADDR)
|
|
#endif
|
|
#if XCHAL_EXCM_LEVEL >= 3
|
|
SECTION_VECTOR (.Level3InterruptVector.text, INTLEVEL3_VECTOR_VADDR)
|
|
#endif
|
|
#if XCHAL_EXCM_LEVEL >= 4
|
|
SECTION_VECTOR (.Level4InterruptVector.text, INTLEVEL4_VECTOR_VADDR)
|
|
#endif
|
|
#if XCHAL_EXCM_LEVEL >= 5
|
|
SECTION_VECTOR (.Level5InterruptVector.text, INTLEVEL5_VECTOR_VADDR)
|
|
#endif
|
|
#if XCHAL_EXCM_LEVEL >= 6
|
|
SECTION_VECTOR (.Level6InterruptVector.text, INTLEVEL6_VECTOR_VADDR)
|
|
#endif
|
|
SECTION_VECTOR (.DebugInterruptVector.literal, DEBUG_VECTOR_VADDR - 4)
|
|
SECTION_VECTOR (.DebugInterruptVector.text, DEBUG_VECTOR_VADDR)
|
|
SECTION_VECTOR (.KernelExceptionVector.literal, KERNEL_VECTOR_VADDR - 4)
|
|
SECTION_VECTOR (.KernelExceptionVector.text, KERNEL_VECTOR_VADDR)
|
|
SECTION_VECTOR (.UserExceptionVector.literal, USER_VECTOR_VADDR - 4)
|
|
SECTION_VECTOR (.UserExceptionVector.text, USER_VECTOR_VADDR)
|
|
SECTION_VECTOR (.DoubleExceptionVector.literal, DOUBLEEXC_VECTOR_VADDR - 48)
|
|
SECTION_VECTOR (.DoubleExceptionVector.text, DOUBLEEXC_VECTOR_VADDR)
|
|
#endif
|
|
|
|
TEXT_TEXT
|
|
VMLINUX_SYMBOL(__sched_text_start) = .;
|
|
*(.sched.literal .sched.text)
|
|
VMLINUX_SYMBOL(__sched_text_end) = .;
|
|
VMLINUX_SYMBOL(__cpuidle_text_start) = .;
|
|
*(.cpuidle.literal .cpuidle.text)
|
|
VMLINUX_SYMBOL(__cpuidle_text_end) = .;
|
|
VMLINUX_SYMBOL(__lock_text_start) = .;
|
|
*(.spinlock.literal .spinlock.text)
|
|
VMLINUX_SYMBOL(__lock_text_end) = .;
|
|
|
|
}
|
|
_etext = .;
|
|
PROVIDE (etext = .);
|
|
|
|
. = ALIGN(16);
|
|
|
|
RODATA
|
|
|
|
/* Relocation table */
|
|
|
|
.fixup : { *(.fixup) }
|
|
|
|
EXCEPTION_TABLE(16)
|
|
/* Data section */
|
|
|
|
_sdata = .;
|
|
RW_DATA_SECTION(XCHAL_ICACHE_LINESIZE, PAGE_SIZE, THREAD_SIZE)
|
|
_edata = .;
|
|
|
|
/* Initialization code and data: */
|
|
|
|
. = ALIGN(PAGE_SIZE);
|
|
__init_begin = .;
|
|
INIT_TEXT_SECTION(PAGE_SIZE)
|
|
|
|
.init.data :
|
|
{
|
|
INIT_DATA
|
|
. = ALIGN(0x4);
|
|
__tagtable_begin = .;
|
|
*(.taglist)
|
|
__tagtable_end = .;
|
|
|
|
. = ALIGN(16);
|
|
__boot_reloc_table_start = ABSOLUTE(.);
|
|
|
|
#ifdef CONFIG_VECTORS_OFFSET
|
|
RELOCATE_ENTRY(_WindowVectors_text,
|
|
.WindowVectors.text);
|
|
#if XCHAL_EXCM_LEVEL >= 2
|
|
RELOCATE_ENTRY(_Level2InterruptVector_text,
|
|
.Level2InterruptVector.text);
|
|
#endif
|
|
#if XCHAL_EXCM_LEVEL >= 3
|
|
RELOCATE_ENTRY(_Level3InterruptVector_text,
|
|
.Level3InterruptVector.text);
|
|
#endif
|
|
#if XCHAL_EXCM_LEVEL >= 4
|
|
RELOCATE_ENTRY(_Level4InterruptVector_text,
|
|
.Level4InterruptVector.text);
|
|
#endif
|
|
#if XCHAL_EXCM_LEVEL >= 5
|
|
RELOCATE_ENTRY(_Level5InterruptVector_text,
|
|
.Level5InterruptVector.text);
|
|
#endif
|
|
#if XCHAL_EXCM_LEVEL >= 6
|
|
RELOCATE_ENTRY(_Level6InterruptVector_text,
|
|
.Level6InterruptVector.text);
|
|
#endif
|
|
RELOCATE_ENTRY(_KernelExceptionVector_text,
|
|
.KernelExceptionVector.text);
|
|
RELOCATE_ENTRY(_UserExceptionVector_text,
|
|
.UserExceptionVector.text);
|
|
RELOCATE_ENTRY(_DoubleExceptionVector_literal,
|
|
.DoubleExceptionVector.literal);
|
|
RELOCATE_ENTRY(_DoubleExceptionVector_text,
|
|
.DoubleExceptionVector.text);
|
|
RELOCATE_ENTRY(_DebugInterruptVector_text,
|
|
.DebugInterruptVector.text);
|
|
#endif
|
|
#if defined(CONFIG_SMP)
|
|
RELOCATE_ENTRY(_SecondaryResetVector_text,
|
|
.SecondaryResetVector.text);
|
|
#endif
|
|
|
|
|
|
__boot_reloc_table_end = ABSOLUTE(.) ;
|
|
|
|
INIT_SETUP(XCHAL_ICACHE_LINESIZE)
|
|
INIT_CALLS
|
|
CON_INITCALL
|
|
SECURITY_INITCALL
|
|
INIT_RAM_FS
|
|
}
|
|
|
|
PERCPU_SECTION(XCHAL_ICACHE_LINESIZE)
|
|
|
|
/* We need this dummy segment here */
|
|
|
|
. = ALIGN(4);
|
|
.dummy : { LONG(0) }
|
|
|
|
#ifdef CONFIG_VECTORS_OFFSET
|
|
/* The vectors are relocated to the real position at startup time */
|
|
|
|
SECTION_VECTOR (_WindowVectors_text,
|
|
.WindowVectors.text,
|
|
WINDOW_VECTORS_VADDR, 4,
|
|
.dummy)
|
|
SECTION_VECTOR (_DebugInterruptVector_literal,
|
|
.DebugInterruptVector.literal,
|
|
DEBUG_VECTOR_VADDR - 4,
|
|
SIZEOF(.WindowVectors.text),
|
|
.WindowVectors.text)
|
|
SECTION_VECTOR (_DebugInterruptVector_text,
|
|
.DebugInterruptVector.text,
|
|
DEBUG_VECTOR_VADDR,
|
|
4,
|
|
.DebugInterruptVector.literal)
|
|
#undef LAST
|
|
#define LAST .DebugInterruptVector.text
|
|
#if XCHAL_EXCM_LEVEL >= 2
|
|
SECTION_VECTOR (_Level2InterruptVector_text,
|
|
.Level2InterruptVector.text,
|
|
INTLEVEL2_VECTOR_VADDR,
|
|
SIZEOF(LAST), LAST)
|
|
# undef LAST
|
|
# define LAST .Level2InterruptVector.text
|
|
#endif
|
|
#if XCHAL_EXCM_LEVEL >= 3
|
|
SECTION_VECTOR (_Level3InterruptVector_text,
|
|
.Level3InterruptVector.text,
|
|
INTLEVEL3_VECTOR_VADDR,
|
|
SIZEOF(LAST), LAST)
|
|
# undef LAST
|
|
# define LAST .Level3InterruptVector.text
|
|
#endif
|
|
#if XCHAL_EXCM_LEVEL >= 4
|
|
SECTION_VECTOR (_Level4InterruptVector_text,
|
|
.Level4InterruptVector.text,
|
|
INTLEVEL4_VECTOR_VADDR,
|
|
SIZEOF(LAST), LAST)
|
|
# undef LAST
|
|
# define LAST .Level4InterruptVector.text
|
|
#endif
|
|
#if XCHAL_EXCM_LEVEL >= 5
|
|
SECTION_VECTOR (_Level5InterruptVector_text,
|
|
.Level5InterruptVector.text,
|
|
INTLEVEL5_VECTOR_VADDR,
|
|
SIZEOF(LAST), LAST)
|
|
# undef LAST
|
|
# define LAST .Level5InterruptVector.text
|
|
#endif
|
|
#if XCHAL_EXCM_LEVEL >= 6
|
|
SECTION_VECTOR (_Level6InterruptVector_text,
|
|
.Level6InterruptVector.text,
|
|
INTLEVEL6_VECTOR_VADDR,
|
|
SIZEOF(LAST), LAST)
|
|
# undef LAST
|
|
# define LAST .Level6InterruptVector.text
|
|
#endif
|
|
SECTION_VECTOR (_KernelExceptionVector_literal,
|
|
.KernelExceptionVector.literal,
|
|
KERNEL_VECTOR_VADDR - 4,
|
|
SIZEOF(LAST), LAST)
|
|
#undef LAST
|
|
SECTION_VECTOR (_KernelExceptionVector_text,
|
|
.KernelExceptionVector.text,
|
|
KERNEL_VECTOR_VADDR,
|
|
4,
|
|
.KernelExceptionVector.literal)
|
|
SECTION_VECTOR (_UserExceptionVector_literal,
|
|
.UserExceptionVector.literal,
|
|
USER_VECTOR_VADDR - 4,
|
|
SIZEOF(.KernelExceptionVector.text),
|
|
.KernelExceptionVector.text)
|
|
SECTION_VECTOR (_UserExceptionVector_text,
|
|
.UserExceptionVector.text,
|
|
USER_VECTOR_VADDR,
|
|
4,
|
|
.UserExceptionVector.literal)
|
|
SECTION_VECTOR (_DoubleExceptionVector_literal,
|
|
.DoubleExceptionVector.literal,
|
|
DOUBLEEXC_VECTOR_VADDR - 48,
|
|
SIZEOF(.UserExceptionVector.text),
|
|
.UserExceptionVector.text)
|
|
SECTION_VECTOR (_DoubleExceptionVector_text,
|
|
.DoubleExceptionVector.text,
|
|
DOUBLEEXC_VECTOR_VADDR,
|
|
48,
|
|
.DoubleExceptionVector.literal)
|
|
|
|
. = (LOADADDR( .DoubleExceptionVector.text ) + SIZEOF( .DoubleExceptionVector.text ) + 3) & ~ 3;
|
|
|
|
#endif
|
|
#if defined(CONFIG_SMP)
|
|
|
|
SECTION_VECTOR (_SecondaryResetVector_text,
|
|
.SecondaryResetVector.text,
|
|
RESET_VECTOR1_VADDR,
|
|
SIZEOF(.DoubleExceptionVector.text),
|
|
.DoubleExceptionVector.text)
|
|
|
|
. = LOADADDR(.SecondaryResetVector.text)+SIZEOF(.SecondaryResetVector.text);
|
|
|
|
#endif
|
|
|
|
. = ALIGN(PAGE_SIZE);
|
|
|
|
__init_end = .;
|
|
|
|
BSS_SECTION(0, 8192, 0)
|
|
|
|
_end = .;
|
|
|
|
.xt.lit : { *(.xt.lit) }
|
|
.xt.prop : { *(.xt.prop) }
|
|
|
|
.debug 0 : { *(.debug) }
|
|
.line 0 : { *(.line) }
|
|
.debug_srcinfo 0 : { *(.debug_srcinfo) }
|
|
.debug_sfnames 0 : { *(.debug_sfnames) }
|
|
.debug_aranges 0 : { *(.debug_aranges) }
|
|
.debug_pubnames 0 : { *(.debug_pubnames) }
|
|
.debug_info 0 : { *(.debug_info) }
|
|
.debug_abbrev 0 : { *(.debug_abbrev) }
|
|
.debug_line 0 : { *(.debug_line) }
|
|
.debug_frame 0 : { *(.debug_frame) }
|
|
.debug_str 0 : { *(.debug_str) }
|
|
.debug_loc 0 : { *(.debug_loc) }
|
|
.debug_macinfo 0 : { *(.debug_macinfo) }
|
|
.debug_weaknames 0 : { *(.debug_weaknames) }
|
|
.debug_funcnames 0 : { *(.debug_funcnames) }
|
|
.debug_typenames 0 : { *(.debug_typenames) }
|
|
.debug_varnames 0 : { *(.debug_varnames) }
|
|
|
|
.xt.insn 0 :
|
|
{
|
|
*(.xt.insn)
|
|
*(.gnu.linkonce.x*)
|
|
}
|
|
|
|
.xt.lit 0 :
|
|
{
|
|
*(.xt.lit)
|
|
*(.gnu.linkonce.p*)
|
|
}
|
|
|
|
/* Sections to be discarded */
|
|
DISCARDS
|
|
/DISCARD/ : { *(.exit.literal) }
|
|
}
|