mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-11 13:56:30 +00:00
83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
90 lines
2.5 KiB
ArmAsm
90 lines
2.5 KiB
ArmAsm
/* SPDX-License-Identifier: GPL-2.0+ */
|
|
/*
|
|
* relocate - common relocation function for AArch64 U-Boot
|
|
*
|
|
* (C) Copyright 2013
|
|
* Albert ARIBAUD <albert.u.boot@aribaud.net>
|
|
* David Feng <fenghua@phytium.com.cn>
|
|
*/
|
|
|
|
#include <asm-offsets.h>
|
|
#include <config.h>
|
|
#include <elf.h>
|
|
#include <linux/linkage.h>
|
|
#include <asm/macro.h>
|
|
|
|
/*
|
|
* void relocate_code (addr_moni)
|
|
*
|
|
* This function relocates the monitor code.
|
|
* x0 holds the destination address.
|
|
*/
|
|
ENTRY(relocate_code)
|
|
stp x29, x30, [sp, #-32]! /* create a stack frame */
|
|
mov x29, sp
|
|
str x0, [sp, #16]
|
|
/*
|
|
* Copy u-boot from flash to RAM
|
|
*/
|
|
adr x1, __image_copy_start /* x1 <- Run &__image_copy_start */
|
|
subs x9, x0, x1 /* x8 <- Run to copy offset */
|
|
b.eq relocate_done /* skip relocation */
|
|
/*
|
|
* Don't ldr x1, __image_copy_start here, since if the code is already
|
|
* running at an address other than it was linked to, that instruction
|
|
* will load the relocated value of __image_copy_start. To
|
|
* correctly apply relocations, we need to know the linked value.
|
|
*
|
|
* Linked &__image_copy_start, which we know was at
|
|
* CONFIG_SYS_TEXT_BASE, which is stored in _TEXT_BASE, as a non-
|
|
* relocated value, since it isn't a symbol reference.
|
|
*/
|
|
ldr x1, _TEXT_BASE /* x1 <- Linked &__image_copy_start */
|
|
subs x9, x0, x1 /* x9 <- Link to copy offset */
|
|
|
|
adr x1, __image_copy_start /* x1 <- Run &__image_copy_start */
|
|
adr x2, __image_copy_end /* x2 <- Run &__image_copy_end */
|
|
copy_loop:
|
|
ldp x10, x11, [x1], #16 /* copy from source address [x1] */
|
|
stp x10, x11, [x0], #16 /* copy to target address [x0] */
|
|
cmp x1, x2 /* until source end address [x2] */
|
|
b.lo copy_loop
|
|
str x0, [sp, #24]
|
|
|
|
/*
|
|
* Fix .rela.dyn relocations
|
|
*/
|
|
adr x2, __rel_dyn_start /* x2 <- Run &__rel_dyn_start */
|
|
adr x3, __rel_dyn_end /* x3 <- Run &__rel_dyn_end */
|
|
fixloop:
|
|
ldp x0, x1, [x2], #16 /* (x0,x1) <- (SRC location, fixup) */
|
|
ldr x4, [x2], #8 /* x4 <- addend */
|
|
and x1, x1, #0xffffffff
|
|
cmp x1, #R_AARCH64_RELATIVE
|
|
bne fixnext
|
|
|
|
/* relative fix: store addend plus offset at dest location */
|
|
add x0, x0, x9
|
|
add x4, x4, x9
|
|
str x4, [x0]
|
|
fixnext:
|
|
cmp x2, x3
|
|
b.lo fixloop
|
|
|
|
relocate_done:
|
|
switch_el x1, 3f, 2f, 1f
|
|
bl hang
|
|
3: mrs x0, sctlr_el3
|
|
b 0f
|
|
2: mrs x0, sctlr_el2
|
|
b 0f
|
|
1: mrs x0, sctlr_el1
|
|
0: tbz w0, #2, 5f /* skip flushing cache if disabled */
|
|
tbz w0, #12, 4f /* skip invalidating i-cache if disabled */
|
|
ic iallu /* i-cache invalidate all */
|
|
isb sy
|
|
4: ldp x0, x1, [sp, #16]
|
|
bl __asm_flush_dcache_range
|
|
5: ldp x29, x30, [sp],#32
|
|
ret
|
|
ENDPROC(relocate_code)
|