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/*
* Copyright (C) 2013
* Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
* Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* 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 <common.h>
#include <io.h>
#include <sizes.h>
#include <asm/barebox-arm.h>
#include <asm/barebox-arm-head.h>
#include <mach/common.h>
#include <mach/lowlevel.h>
void __naked barebox_arm_reset_vector(void)
{
arm_cpu_lowlevel_init();
mvebu_barebox_entry(NULL);
}
/*
* All MVEBU SoCs start with internal registers at 0xd0000000.
* To get more contiguous address space and as Linux expects them
* there, we remap them early to 0xf1000000.
*
* There is no way to determine internal registers base address
* safely later on, as the remap register itself is within the
* internal registers.
*/
#define MVEBU_BOOTUP_INT_REG_BASE 0xd0000000
#define MVEBU_BRIDGE_REG_BASE 0x20000
#define DEVICE_INTERNAL_BASE_ADDR (MVEBU_BRIDGE_REG_BASE + 0x80)
static void mvebu_remap_registers(void)
{
writel(MVEBU_REMAP_INT_REG_BASE,
IOMEM(MVEBU_BOOTUP_INT_REG_BASE) + DEVICE_INTERNAL_BASE_ADDR);
}
/*
* Determining the actual memory size is highly SoC dependent,
* but for all SoCs RAM starts at 0x00000000. Therefore, we start
* with a minimal memory setup of 64M and probe correct memory size
* later.
*/
#define MVEBU_BOOTUP_MEMORY_BASE 0x00000000
#define MVEBU_BOOTUP_MEMORY_SIZE SZ_64M
void __naked __noreturn mvebu_barebox_entry(void *boarddata)
{
mvebu_remap_registers();
barebox_arm_entry(MVEBU_BOOTUP_MEMORY_BASE,
MVEBU_BOOTUP_MEMORY_SIZE, boarddata);
}
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