mirror of
https://github.com/AsahiLinux/u-boot
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54 lines
1,003 B
ArmAsm
54 lines
1,003 B
ArmAsm
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/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (C) 2020 MediaTek Inc.
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*
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* Author: Weijie Gao <weijie.gao@mediatek.com>
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*/
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#include <config.h>
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#include <asm-offsets.h>
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#include <asm/regdef.h>
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#include <asm/asm.h>
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.set noreorder
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NESTED(lowlevel_init, 0, ra)
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/* Save ra and do real lowlevel initialization */
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move s0, ra
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/*
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* Use SRAM from 802.11n MAC/BBP, 16KiB (0x10184000 ~ 0x10187fff)
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* NOTE: non-word operations may fail in this SRAM.
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* Use it as stack only for CPU/DRAM init which only has word operations.
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*/
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PTR_LI sp, 0xb0187f00
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/* We still need a temporary gd for udelay */
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PTR_SUBU \
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sp, sp, GD_SIZE # reserve space for gd
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li t0, -16
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and sp, sp, t0 # force 16 byte alignment
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move k0, sp # save gd pointer
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move fp, sp
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/* Clear gd */
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move t0, k0
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1:
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PTR_S zero, 0(t0)
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PTR_ADDIU t0, PTRSIZE
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blt t0, t1, 1b
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nop
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/* Do CPU & DRAM initialization */
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PTR_LA t9, mt7620_init
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jalr t9
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nop
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/* Restore ra */
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move ra, s0
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jr ra
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nop
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END(lowlevel_init)
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