1 /* SPDX-License-Identifier: GPL-2.0+ */
3 * armboot - Startup Code for ARM926EJS CPU-core
5 * Copyright (c) 2003 Texas Instruments
7 * ----- Adapted for OMAP1610 OMAP730 from ARM925t code ------
9 * Copyright (c) 2001 Marius Gröger <mag@sysgo.de>
10 * Copyright (c) 2002 Alex Züpke <azu@sysgo.de>
11 * Copyright (c) 2002 Gary Jennejohn <garyj@denx.de>
12 * Copyright (c) 2003 Richard Woodruff <r-woodruff2@ti.com>
13 * Copyright (c) 2003 Kshitij <kshitij@ti.com>
20 *************************************************************************
22 * Startup Code (reset vector)
24 * The BootROM already initialized its own stack in the [0-0xb00] reserved
25 * range of the SRAM. The SPL (in _main) will update the stack pointer to
26 * its own SRAM area (right before the gd section).
28 *************************************************************************
32 .globl back_to_bootrom
36 * SPL has to return back to BootROM in a few cases (eg. Ethernet boot,
37 * UART boot, USB boot): save registers in BootROM's stack and then the
38 * BootROM's stack pointer in the SPL's data section.
41 ldr r0, =bootrom_stash_sp
48 mcr p15, 0, r0, c7, c7, 0 /* Flush v3/v4 cache */
49 mcr p15, 0, r0, c8, c7, 0 /* Flush v4 TLB */
52 * Enable instruction cache
54 mrc p15, 0, r0, c1, c0, 0
55 orr r0, r0, #0x00001000 /* set bit 12 (I) I-Cache */
56 mcr p15, 0, r0, c1, c0, 0
59 * Go setup Memory and board specific bits prior to relocation.
60 * This call is not supposed to return.
62 b _main /* _main will call board_init_f */