mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-11 22:03:15 +00:00
10117a2985
Drop CONFIG_SYS_MEMORY_TOP. Rename CONFIG_SYS_TEXT_ADDR to XTENSA_SYS_TEXT_ADDR. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
116 lines
4.1 KiB
Text
116 lines
4.1 KiB
Text
/*
|
|
* (C) Copyright 2008 - 2013 Tensilica, Inc.
|
|
* (C) Copyright 2014 - 2016 Cadence Design Systems Inc.
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
#include <config.h>
|
|
#include <asm/ldscript.h>
|
|
#include <asm/arch/core.h>
|
|
#include <asm/addrspace.h>
|
|
#include <asm-offsets.h>
|
|
|
|
OUTPUT_ARCH(xtensa)
|
|
ENTRY(_start)
|
|
|
|
/*
|
|
* U-Boot resets from SYSROM and unpacks itself from a ROM store to RAM.
|
|
* The reset vector is usually near the base of SYSROM and has room
|
|
* above it for the ROM store into which the rest of U-Boot is packed.
|
|
* The ROM store also needs to be above any other vectors that are in ROM.
|
|
* If a core has its vectors near the top of ROM, this must be edited.
|
|
*
|
|
* Note that to run C code out of ROM, the processor would have to support
|
|
* 'relocatable' exception vectors and provide a scratch memory for the
|
|
* initial stack. Not all Xtensa processor configurations support that, so
|
|
* we can simplify the boot process and unpack U-Boot to RAM immediately.
|
|
* This, however, requires that memory have been initialized throug some
|
|
* other means (serial ROM, for example) or are initialized early (requiring
|
|
* an assembler function. See start.S for more details)
|
|
*/
|
|
|
|
SECTIONS
|
|
{
|
|
. = + SIZEOF_HEADERS;
|
|
SECTION_ResetVector(XCHAL_RESET_VECTOR_VADDR, LMA_EQ_VMA)
|
|
|
|
.reloc_table ALIGN(4) : FOLLOWING(.ResetVector.text)
|
|
{
|
|
__reloc_table_start = ABSOLUTE(.);
|
|
#if XCHAL_HAVE_WINDOWED
|
|
RELOCATE2(WindowVectors,text);
|
|
#endif
|
|
RELOCATE2(KernelExceptionVector,literal);
|
|
RELOCATE2(KernelExceptionVector,text);
|
|
RELOCATE2(UserExceptionVector,literal);
|
|
RELOCATE2(UserExceptionVector,text);
|
|
RELOCATE2(DoubleExceptionVector,literal);
|
|
RELOCATE2(DoubleExceptionVector,text);
|
|
RELOCATE1(text);
|
|
RELOCATE1(rodata);
|
|
RELOCATE1(data);
|
|
RELOCATE1(u_boot_list);
|
|
__reloc_table_end = ABSOLUTE(.);
|
|
}
|
|
|
|
#if XCHAL_HAVE_WINDOWED
|
|
SECTION_VECTOR(WindowVectors,text,XCHAL_WINDOW_VECTORS_VADDR,
|
|
FOLLOWING(.reloc_table))
|
|
SECTION_VECTOR(KernelExceptionVector,literal,XCHAL_KERNEL_VECTOR_VADDR-8,
|
|
FOLLOWING(.WindowVectors.text))
|
|
#else
|
|
SECTION_VECTOR(KernelExceptionVector,literal,XCHAL_KERNEL_VECTOR_VADDR-8,
|
|
FOLLOWING(.reloc_table))
|
|
#endif
|
|
SECTION_VECTOR(KernelExceptionVector,text,XCHAL_KERNEL_VECTOR_VADDR,
|
|
FOLLOWING(.KernelExceptionVector.literal))
|
|
SECTION_VECTOR(UserExceptionVector,literal,XCHAL_USER_VECTOR_VADDR-8,
|
|
FOLLOWING(.KernelExceptionVector.text))
|
|
SECTION_VECTOR(UserExceptionVector,text,XCHAL_USER_VECTOR_VADDR,
|
|
FOLLOWING(.UserExceptionVector.literal))
|
|
SECTION_VECTOR(DoubleExceptionVector,literal,XCHAL_DOUBLEEXC_VECTOR_VADDR-8,
|
|
FOLLOWING(.UserExceptionVector.text))
|
|
SECTION_VECTOR(DoubleExceptionVector,text,XCHAL_DOUBLEEXC_VECTOR_VADDR,
|
|
FOLLOWING(.DoubleExceptionVector.literal))
|
|
|
|
__monitor_start = XTENSA_SYS_TEXT_ADDR;
|
|
|
|
SECTION_text(XTENSA_SYS_TEXT_ADDR, FOLLOWING(.DoubleExceptionVector.text))
|
|
SECTION_rodata(ALIGN(16), FOLLOWING(.text))
|
|
SECTION_u_boot_list(ALIGN(16), FOLLOWING(.rodata))
|
|
SECTION_data(ALIGN(16), FOLLOWING(.u_boot_list))
|
|
|
|
__reloc_end = .;
|
|
__init_end = .;
|
|
|
|
SECTION_bss(__init_end (OVERLAY),)
|
|
|
|
__monitor_end = .;
|
|
|
|
/*
|
|
* On many Xtensa boards a region of RAM may be mapped to the ROM address
|
|
* space to facilitate on-chip-debug, and U-Boot must fit with that region.
|
|
* The config variables CONFIG_SYS_MONITOR_* define the region.
|
|
* If U-Boot extends beyond this region it will appear discontiguous in the
|
|
* address space and is in danger of overwriting itself during unpacking
|
|
* ("relocation").
|
|
* This causes U-Boot to crash in a way that is difficult to debug. On some
|
|
* boards (such as xtav60) the region is small enough that U-Boot will not
|
|
* fit if compiled entirely with -O0 (a common scenario). To avoid a lengthy
|
|
* debugging session when this happens, ensure a link-time error occurs.
|
|
*
|
|
*/
|
|
|
|
ASSERT(__monitor_end - __monitor_start <= CONFIG_SYS_MONITOR_LEN,
|
|
"U-Boot ROM image is too large. Check optimization level.")
|
|
|
|
SECTION_xtensa
|
|
SECTION_debug
|
|
|
|
/DISCARD/ : { *(.dynstr*) }
|
|
/DISCARD/ : { *(.hash*) }
|
|
/DISCARD/ : { *(.interp) }
|
|
/DISCARD/ : { *(.got*) }
|
|
/DISCARD/ : { *(.dynsym) }
|
|
}
|