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#include <asm/macro.h> 15 16/* 17 * void relocate_code (addr_moni) 18 * 19 * This function relocates the monitor code. 20 * x0 holds the destination address. 21 */ 22ENTRY(relocate_code) 23 stp x29, x30, [sp, #-32]! /* create a stack frame */ 24 mov x29, sp 25 str x0, [sp, #16] 26 /* 27 * Copy u-boot from flash to RAM 28 */ 29 ldr x1, =__image_copy_start /* x1 <- SRC &__image_copy_start */ 30 subs x9, x0, x1 /* x9 <- relocation offset */ 31 b.eq relocate_done /* skip relocation */ 32 ldr x2, =__image_copy_end /* x2 <- SRC &__image_copy_end */ 33 34copy_loop: 35 ldp x10, x11, [x1], #16 /* copy from source address [x1] */ 36 stp x10, x11, [x0], #16 /* copy to target address [x0] */ 37 cmp x1, x2 /* until source end address [x2] */ 38 b.lo copy_loop 39 str x0, [sp, #24] 40 41 /* 42 * Fix .rela.dyn relocations 43 */ 44 ldr x2, =__rel_dyn_start /* x2 <- SRC &__rel_dyn_start */ 45 ldr x3, =__rel_dyn_end /* x3 <- SRC &__rel_dyn_end */ 46fixloop: 47 ldp x0, x1, [x2], #16 /* (x0,x1) <- (SRC location, fixup) */ 48 ldr x4, [x2], #8 /* x4 <- addend */ 49 and x1, x1, #0xffffffff 50 cmp x1, #1027 /* relative fixup? */ 51 bne fixnext 52 53 /* relative fix: store addend plus offset at dest location */ 54 add x0, x0, x9 55 add x4, x4, x9 56 str x4, [x0] 57fixnext: 58 cmp x2, x3 59 b.lo fixloop 60 61relocate_done: 62 switch_el x1, 3f, 2f, 1f 63 bl hang 643: mrs x0, sctlr_el3 65 b 0f 662: mrs x0, sctlr_el2 67 b 0f 681: mrs x0, sctlr_el1 690: tbz w0, #2, 5f /* skip flushing cache if disabled */ 70 tbz w0, #12, 4f /* invalide i-cache is enabled */ 71 ic iallu /* i-cache invalidate all */ 72 isb sy 734: ldp x0, x1, [sp, #16] 74 bl __asm_flush_dcache_range 755: ldp x29, x30, [sp],#16 76 ret 77ENDPROC(relocate_code) 78