projects / people / ms / u-boot.git / blame
| Commit | Line | Data |
|---|---|---|
| 0ae76531 DF |
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> | |
| c70f74a0 | 13 | #include <elf.h> |
| 0ae76531 | 14 | #include <linux/linkage.h> |
| 83571bca | 15 | #include <asm/macro.h> |
| 0ae76531 DF |
16 | |
| 17 | /* | |
| 18 | * void relocate_code (addr_moni) | |
| 19 | * | |
| 20 | * This function relocates the monitor code. | |
| 21 | * x0 holds the destination address. | |
| 22 | */ | |
| 23 | ENTRY(relocate_code) | |
| 83571bca YS |
24 | stp x29, x30, [sp, #-32]! /* create a stack frame */ |
| 25 | mov x29, sp | |
| 26 | str x0, [sp, #16] | |
| 0ae76531 DF |
27 | /* |
| 28 | * Copy u-boot from flash to RAM | |
| 29 | */ | |
| 30 | ldr x1, =__image_copy_start /* x1 <- SRC &__image_copy_start */ | |
| 31 | subs x9, x0, x1 /* x9 <- relocation offset */ | |
| 32 | b.eq relocate_done /* skip relocation */ | |
| 33 | ldr x2, =__image_copy_end /* x2 <- SRC &__image_copy_end */ | |
| 34 | ||
| 35 | copy_loop: | |
| 36 | ldp x10, x11, [x1], #16 /* copy from source address [x1] */ | |
| 37 | stp x10, x11, [x0], #16 /* copy to target address [x0] */ | |
| 38 | cmp x1, x2 /* until source end address [x2] */ | |
| 39 | b.lo copy_loop | |
| 83571bca | 40 | str x0, [sp, #24] |
| 0ae76531 DF |
41 | |
| 42 | /* | |
| 43 | * Fix .rela.dyn relocations | |
| 44 | */ | |
| 45 | ldr x2, =__rel_dyn_start /* x2 <- SRC &__rel_dyn_start */ | |
| 46 | ldr x3, =__rel_dyn_end /* x3 <- SRC &__rel_dyn_end */ | |
| 47 | fixloop: | |
| 48 | ldp x0, x1, [x2], #16 /* (x0,x1) <- (SRC location, fixup) */ | |
| 49 | ldr x4, [x2], #8 /* x4 <- addend */ | |
| 50 | and x1, x1, #0xffffffff | |
| c70f74a0 | 51 | cmp x1, #R_AARCH64_RELATIVE |
| 0ae76531 DF |
52 | bne fixnext |
| 53 | ||
| 54 | /* relative fix: store addend plus offset at dest location */ | |
| 55 | add x0, x0, x9 | |
| 56 | add x4, x4, x9 | |
| 57 | str x4, [x0] | |
| 58 | fixnext: | |
| 59 | cmp x2, x3 | |
| 60 | b.lo fixloop | |
| 61 | ||
| 62 | relocate_done: | |
| 83571bca YS |
63 | switch_el x1, 3f, 2f, 1f |
| 64 | bl hang | |
| 65 | 3: mrs x0, sctlr_el3 | |
| 66 | b 0f | |
| 67 | 2: mrs x0, sctlr_el2 | |
| 68 | b 0f | |
| 69 | 1: mrs x0, sctlr_el1 | |
| 70 | 0: tbz w0, #2, 5f /* skip flushing cache if disabled */ | |
| 1f4f5e52 | 71 | tbz w0, #12, 4f /* skip invalidating i-cache if disabled */ |
| 83571bca YS |
72 | ic iallu /* i-cache invalidate all */ |
| 73 | isb sy | |
| 74 | 4: ldp x0, x1, [sp, #16] | |
| 75 | bl __asm_flush_dcache_range | |
| 7baf952f | 76 | 5: ldp x29, x30, [sp],#32 |
| 0ae76531 DF |
77 | ret |
| 78 | ENDPROC(relocate_code) |