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/*
* Copyright (C) 2013 Antony Pavlov <antonynpavlov@gmail.com>
* Copyright (C) 2013 Oleksij Rempel <linux@rempel-privat.de>
*
* This file is part of barebox.
* See file CREDITS for list of people who contributed to this project.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
#include <asm/pbl_macros.h>
#include <mach/pbl_macros.h>
#include <mach/ar2312_regs.h>
#include <mach/debug_ll.h>
.macro board_pbl_start
.set push
.set noreorder
mips_barebox_10h
mips_disable_interrupts
pbl_ar2312_pll
pbl_ar2312_rst_uart0
debug_ll_ns16550_init
debug_ll_outc 'a'
debug_ll_ns16550_outnl
/* check if SDRAM is already configured,
* if yes, we are probably starting
* as second stage loader and can skip configuration */
la t0, KSEG1 | AR2312_MEM_CFG1
lw t1, 0(t0)
and t0, t1, MEM_CFG1_E0
beq zero, t0, 1f
nop
pbl_probe_mem t0, t1, KSEG1
beq t0, t1, sdram_configured
nop
1:
/* start SDRAM configuration */
pbl_ar2312_x16_sdram
/* check one more time. if some thing wrong,
* we don't need to continue */
pbl_probe_mem t0, t1, KSEG1
beq t0, t1, sdram_configured
nop
debug_ll_outc '#'
debug_ll_ns16550_outnl
1:
b 1b /* dead end */
nop
sdram_configured:
debug_ll_outc 'b'
debug_ll_ns16550_outnl
copy_to_link_location pbl_start
.set pop
.endm
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