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/* SPDX-License-Identifier: GPL-2.0+ */
/*
* armboot - Startup Code for ARM926EJS CPU-core
*
* Copyright (c) 2003 Texas Instruments
*
* ----- Adapted for OMAP1610 OMAP730 from ARM925t code ------
*
* Copyright (c) 2001 Marius Gröger <mag@sysgo.de>
* Copyright (c) 2002 Alex Züpke <azu@sysgo.de>
* Copyright (c) 2002 Gary Jennejohn <garyj@denx.de>
* Copyright (c) 2003 Richard Woodruff <r-woodruff2@ti.com>
* Copyright (c) 2003 Kshitij <kshitij@ti.com>
*/
#include <config.h>
/*
*************************************************************************
*
* Startup Code (reset vector)
*
* The BootROM already initialized its own stack in the [0-0xb00] reserved
* range of the SRAM. The SPL (in _main) will update the stack pointer to
* its own SRAM area (right before the gd section).
*
*************************************************************************
*/
.globl reset
.globl back_to_bootrom
reset:
/*
* SPL has to return back to BootROM in a few cases (eg. Ethernet boot,
* UART boot, USB boot): save registers in BootROM's stack and then the
* BootROM's stack pointer in the SPL's data section.
*/
push {r0-r12,lr}
ldr r0, =bootrom_stash_sp
str sp, [r0]
/*
* Flush v4 I/D caches
*/
mov r0, #0
mcr p15, 0, r0, c7, c7, 0 /* Flush v3/v4 cache */
mcr p15, 0, r0, c8, c7, 0 /* Flush v4 TLB */
/*
* Enable instruction cache
*/
mrc p15, 0, r0, c1, c0, 0
orr r0, r0, #0x00001000 /* set bit 12 (I) I-Cache */
mcr p15, 0, r0, c1, c0, 0
/*
* Go setup Memory and board specific bits prior to relocation.
* This call is not supposed to return.
*/
b _main /* _main will call board_init_f */
back_to_bootrom:
pop {r0-r12,pc}
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