71 lines
1.5 KiB
ArmAsm
71 lines
1.5 KiB
ArmAsm
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* A lowlevel_init function that sets up the stack to call a C function to
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* perform further init.
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*
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* (C) Copyright 2010
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* Texas Instruments, <www.ti.com>
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*
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* Author :
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* Aneesh V <aneesh@ti.com>
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*/
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#include <asm-offsets.h>
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#include <config.h>
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#include <linux/linkage.h>
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.pushsection .text.s_init, "ax"
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WEAK(s_init)
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bx lr
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ENDPROC(s_init)
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.popsection
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.pushsection .text.lowlevel_init, "ax"
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WEAK(lowlevel_init)
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/*
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* Setup a temporary stack. Global data is not available yet.
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*/
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#if defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_STACK)
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ldr sp, =CONFIG_SPL_STACK
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#else
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ldr sp, =CONFIG_SYS_INIT_SP_ADDR
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#endif
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bic sp, sp, #7 /* 8-byte alignment for ABI compliance */
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#ifdef CONFIG_SPL_DM
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mov r9, #0
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#else
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/*
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* Set up global data for boards that still need it. This will be
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* removed soon.
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*/
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#ifdef CONFIG_SPL_BUILD
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ldr r9, =gdata
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#else
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sub sp, sp, #GD_SIZE
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bic sp, sp, #7
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mov r9, sp
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#endif
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#endif
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/*
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* Save the old lr(passed in ip) and the current lr to stack
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*/
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push {ip, lr}
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/*
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* Call the very early init function. This should do only the
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* absolute bare minimum to get started. It should not:
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*
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* - set up DRAM
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* - use global_data
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* - clear BSS
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* - try to start a console
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*
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* For boards with SPL this should be empty since SPL can do all of
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* this init in the SPL board_init_f() function which is called
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* immediately after this.
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*/
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bl s_init
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pop {ip, pc}
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ENDPROC(lowlevel_init)
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.popsection
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