mirror of
https://github.com/ARM-software/arm-trusted-firmware.git
synced 2025-04-15 17:14:21 +00:00
5accce5bcc
Romlib is a new image that is stored in ROM and contains the code of several libraries that can be shared between different images. All the functions within in the library are accessed using a jump table which allows to update the romlib image whithout changing the binary compatibility. This jump table can be also stored in RAM and it can allow to patch a romlib with potential bugs fixes.. Change-Id: If980ccdaca24b7aaca900e32acc68baf6f94ab35 Signed-off-by: Roberto Vargas <roberto.vargas@arm.com>
30 lines
524 B
ArmAsm
30 lines
524 B
ArmAsm
/*
|
|
* Copyright (c) 2018, ARM Limited and Contributors. All rights reserved.
|
|
*
|
|
* SPDX-License-Identifier: BSD-3-Clause
|
|
*/
|
|
|
|
.globl rom_lib_init
|
|
.extern __DATA_RAM_START__, __DATA_ROM_START__, __DATA_SIZE__
|
|
.extern memset, memcpy
|
|
|
|
rom_lib_init:
|
|
cmp w0, #1
|
|
mov w0, #0
|
|
b.le 1f
|
|
ret
|
|
|
|
1: stp x29, x30, [sp, #-16]!
|
|
adrp x0, __DATA_RAM_START__
|
|
ldr x1,= __DATA_ROM_START__
|
|
ldr x2, =__DATA_SIZE__
|
|
bl memcpy
|
|
|
|
ldr x0, =__BSS_START__
|
|
mov x1, #0
|
|
ldr x2, =__BSS_SIZE__
|
|
bl memset
|
|
ldp x29, x30, [sp], #16
|
|
|
|
mov w0, #1
|
|
ret
|