diff options
Diffstat (limited to 'roms/u-boot/arch/arm/lib/relocate_64.S')
| -rw-r--r-- | roms/u-boot/arch/arm/lib/relocate_64.S | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/roms/u-boot/arch/arm/lib/relocate_64.S b/roms/u-boot/arch/arm/lib/relocate_64.S new file mode 100644 index 00000000..5c51cae8 --- /dev/null +++ b/roms/u-boot/arch/arm/lib/relocate_64.S @@ -0,0 +1,77 @@ +/* + * relocate - common relocation function for AArch64 U-Boot + * + * (C) Copyright 2013 + * Albert ARIBAUD <albert.u.boot@aribaud.net> + * David Feng <fenghua@phytium.com.cn> + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <asm-offsets.h> +#include <config.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 + */ + ldr x1, =__image_copy_start /* x1 <- SRC &__image_copy_start */ + subs x9, x0, x1 /* x9 <- relocation offset */ + b.eq relocate_done /* skip relocation */ + ldr x2, =__image_copy_end /* x2 <- SRC &__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 + */ + ldr x2, =__rel_dyn_start /* x2 <- SRC &__rel_dyn_start */ + ldr x3, =__rel_dyn_end /* x3 <- SRC &__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, #1027 /* relative fixup? */ + 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 /* invalide i-cache is enabled */ + ic iallu /* i-cache invalidate all */ + isb sy +4: ldp x0, x1, [sp, #16] + bl __asm_flush_dcache_range +5: ldp x29, x30, [sp],#16 + ret +ENDPROC(relocate_code) |