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37 lines
698 B
37 lines
698 B
4 months ago
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/*
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* Copyright (c) 2018, ARM Limited and Contributors. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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.globl rom_lib_init
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.extern __DATA_RAM_START__, __DATA_ROM_START__, __DATA_RAM_END__
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.extern memset, memcpy
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rom_lib_init:
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cmp w0, #1
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mov w0, #0
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b.le 1f
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ret
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1: stp x29, x30, [sp, #-16]!
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adrp x0, __DATA_RAM_START__
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adrp x1, __DATA_ROM_START__
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add x1, x1, :lo12:__DATA_ROM_START__
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adrp x2, __DATA_RAM_END__
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add x2, x2, :lo12:__DATA_RAM_END__
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sub x2, x2, x0
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bl memcpy
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adrp x0,__BSS_START__
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add x0, x0, :lo12:__BSS_START__
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mov x1, #0
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adrp x2, __BSS_END__
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add x2, x2, :lo12:__BSS_END__
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sub x2, x2, x0
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bl memset
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ldp x29, x30, [sp], #16
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mov w0, #1
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ret
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