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 *************************************************************************
35 * SPL has to return back to BootROM in a few cases.
36 * eg. Ethernet boot, UART boot, USB boot
37 * Saving registers for returning back
39 stmdb sp!, {r0-r12,r14}
41 ldmia sp!, {r0-r12,pc}
44 *************************************************************************
46 * CPU_init_critical registers
48 * setup important registers
51 *************************************************************************
58 mcr p15, 0, r0, c7, c7, 0 /* flush v3/v4 cache */
59 mcr p15, 0, r0, c8, c7, 0 /* flush v4 TLB */
62 * enable instruction cache
64 mrc p15, 0, r0, c1, c0, 0
65 orr r0, r0, #0x00001000 /* set bit 12 (I) I-Cache */
66 mcr p15, 0, r0, c1, c0, 0
69 * Go setup Memory and board specific bits prior to relocation.
72 bl _main /* _main will call board_init_f */