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https://github.com/smaeul/u-boot.git
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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>
113 lines
2.8 KiB
ArmAsm
113 lines
2.8 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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#include <common.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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bx 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 D cache before disabling it
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*/
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mov r0, #0
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flush_dcache:
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mrc p15, 0, r15, c7, c10, 3
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bne flush_dcache
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mcr p15, 0, r0, c8, c7, 0 /* invalidate TLB */
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mcr p15, 0, r0, c7, c5, 0 /* invalidate I Cache */
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/*
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* disable MMU and D cache
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* enable I cache if SYS_ICACHE_OFF is not defined
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*/
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mrc p15, 0, r0, c1, c0, 0
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bic r0, r0, #0x00000300 /* clear bits 9:8 (---- --RS) */
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bic r0, r0, #0x00000087 /* clear bits 7, 2:0 (B--- -CAM) */
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#ifdef CONFIG_SYS_EXCEPTION_VECTORS_HIGH
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orr r0, r0, #0x00002000 /* set bit 13 (--V- ----) */
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#else
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bic r0, r0, #0x00002000 /* clear bit 13 (--V- ----) */
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#endif
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orr r0, r0, #0x00000002 /* set bit 1 (A) Align */
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#if !CONFIG_IS_ENABLED(SYS_ICACHE_OFF)
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orr r0, r0, #0x00001000 /* set bit 12 (I) I-Cache */
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#endif
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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 r4, lr /* perserve link reg across call */
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bl lowlevel_init /* go setup pll,mux,memory */
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mov lr, r4 /* restore link */
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#endif
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mov pc, lr /* back to my caller */
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#endif /* CONFIG_IS_ENABLED(SKIP_LOWLEVEL_INIT) */
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