1/* 2 * relocate - common relocation function for AArch64 U-Boot 3 * 4 * (C) Copyright 2013 5 * Albert ARIBAUD <albert.u.boot@aribaud.net> 6 * David Feng <fenghua@phytium.com.cn> 7 * 8 * SPDX-License-Identifier: GPL-2.0+ 9 */ 10 11#include <asm-offsets.h> 12#include <config.h> 13#include <linux/linkage.h> 14 15/* 16 * void relocate_code (addr_moni) 17 * 18 * This function relocates the monitor code. 19 * x0 holds the destination address. 20 */ 21ENTRY(relocate_code) 22 /* 23 * Copy u-boot from flash to RAM 24 */ 25 ldr x1, =__image_copy_start /* x1 <- SRC &__image_copy_start */ 26 subs x9, x0, x1 /* x9 <- relocation offset */ 27 b.eq relocate_done /* skip relocation */ 28 ldr x2, =__image_copy_end /* x2 <- SRC &__image_copy_end */ 29 30copy_loop: 31 ldp x10, x11, [x1], #16 /* copy from source address [x1] */ 32 stp x10, x11, [x0], #16 /* copy to target address [x0] */ 33 cmp x1, x2 /* until source end address [x2] */ 34 b.lo copy_loop 35 36 /* 37 * Fix .rela.dyn relocations 38 */ 39 ldr x2, =__rel_dyn_start /* x2 <- SRC &__rel_dyn_start */ 40 ldr x3, =__rel_dyn_end /* x3 <- SRC &__rel_dyn_end */ 41fixloop: 42 ldp x0, x1, [x2], #16 /* (x0,x1) <- (SRC location, fixup) */ 43 ldr x4, [x2], #8 /* x4 <- addend */ 44 and x1, x1, #0xffffffff 45 cmp x1, #1027 /* relative fixup? */ 46 bne fixnext 47 48 /* relative fix: store addend plus offset at dest location */ 49 add x0, x0, x9 50 add x4, x4, x9 51 str x4, [x0] 52fixnext: 53 cmp x2, x3 54 b.lo fixloop 55 56relocate_done: 57 ret 58ENDPROC(relocate_code) 59