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a296055b82
Similar to the lzma-loader on our MIPS targets, the spi-loader acts as a second-stage loader that will then load and start the actual kernel. As the TL-WDR4900 uses SPI-NOR and the P1010 family does not have support for memory mapping of this type of flash, this loader needs to contain a basic driver for the FSL ESPI controller. Signed-off-by: Matthias Schiffer <mschiffer@universe-factory.net>
37 lines
684 B
ArmAsm
37 lines
684 B
ArmAsm
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* Copyright (C) 2022 Matthias Schiffer <mschiffer@universe-factory.net>
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*
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* Based on Linux arch/powerpc/boot/crt0.S, which is:
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*
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* Copyright (C) Paul Mackerras 1997.
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*/
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#include <ppc_asm.h>
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.text
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.global _start
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_start:
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/* Do a cache flush for our text, in case the loader didn't */
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lis r3,_text_start@ha
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addi r3,r3,_text_start@l
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li r4,_text_len
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bl flush_cache
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/* Clear the BSS */
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lis r3,_bss_start@ha
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addi r3,r3,_bss_start@l
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li r4,0
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li r5,_bss_len
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bl memset
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/* Set up stack */
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lis r1,_stack_top@ha
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addi r1,r1,_stack_top@l
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/* Establish a stack frame */
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li r0,0
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stwu r0,-16(r1)
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/* Call start */
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b start
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