mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-12 16:07:30 +00:00
a2ac2b964b
This converts the following to Kconfig: CONFIG_SKIP_LOWLEVEL_INIT CONFIG_SKIP_LOWLEVEL_INIT_ONLY In order to do this, we need to introduce SPL and TPL variants of these options so that we can clearly disable these options only in SPL in some cases, and both instances in other cases. Signed-off-by: Tom Rini <trini@konsulko.com>
101 lines
2.4 KiB
ArmAsm
101 lines
2.4 KiB
ArmAsm
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* armboot - Startup Code for ARM926EJS CPU-core
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*
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* Copyright (c) 2003 Texas Instruments
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*
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* ----- Adapted for OMAP1610 OMAP730 from ARM925t code ------
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*
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* Copyright (c) 2001 Marius Gröger <mag@sysgo.de>
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* Copyright (c) 2002 Alex Züpke <azu@sysgo.de>
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* Copyright (c) 2002 Gary Jennejohn <garyj@denx.de>
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* Copyright (c) 2003 Richard Woodruff <r-woodruff2@ti.com>
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* Copyright (c) 2003 Kshitij <kshitij@ti.com>
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* Copyright (c) 2010 Albert Aribaud <albert.u.boot@aribaud.net>
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*/
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#include <asm-offsets.h>
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#include <config.h>
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/*
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*************************************************************************
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*
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* Startup Code (reset vector)
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*
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* do important init only if we don't start from memory!
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* setup Memory and board specific bits prior to relocation.
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* relocate armboot to ram
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* setup stack
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*
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*************************************************************************
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*/
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.globl reset
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reset:
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/*
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* set the cpu to SVC32 mode
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*/
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mrs r0,cpsr
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bic r0,r0,#0x1f
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orr r0,r0,#0xd3
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msr cpsr,r0
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/*
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* we do sys-critical inits only at reboot,
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* not when booting from ram!
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*/
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#if !CONFIG_IS_ENABLED(SKIP_LOWLEVEL_INIT)
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bl cpu_init_crit
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#endif
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bl _main
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/*------------------------------------------------------------------------------*/
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.globl c_runtime_cpu_setup
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c_runtime_cpu_setup:
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mov pc, lr
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/*
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*************************************************************************
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*
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* CPU_init_critical registers
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*
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* setup important registers
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* setup memory timing
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*
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*************************************************************************
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*/
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#if !CONFIG_IS_ENABLED(SKIP_LOWLEVEL_INIT)
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cpu_init_crit:
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/*
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* flush v4 I/D caches
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*/
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mov r0, #0
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mcr p15, 0, r0, c7, c5, 0 /* flush v4 I-cache */
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mcr p15, 0, r0, c7, c6, 0 /* flush v4 D-cache */
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/*
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* disable MMU stuff and caches
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*/
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mrc p15, 0, r0, c1, c0, 0
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bic r0, r0, #0x00002300 /* clear bits 13, 9:8 (--V- --RS) */
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bic r0, r0, #0x00000087 /* clear bits 7, 2:0 (B--- -CAM) */
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orr r0, r0, #0x00000002 /* set bit 1 (A) Align */
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orr r0, r0, #0x00001000 /* set bit 12 (I) I-Cache */
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mcr p15, 0, r0, c1, c0, 0
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#if !CONFIG_IS_ENABLED(SKIP_LOWLEVEL_INIT_ONLY)
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/*
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* Go setup Memory and board specific bits prior to relocation.
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*/
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mov ip, lr /* perserve link reg across call */
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bl lowlevel_init /* go setup memory */
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mov lr, ip /* restore link */
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#endif
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mov pc, lr /* back to my caller */
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#endif
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