summaryrefslogtreecommitdiffstats
path: root/arch/arm/boards/phytec-phycard-imx6/lowlevel.c
blob: d85a1ab0a1d2641d0cfc6b4530687ad2c3d94672 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
/*
 * Copyright (C) 2014 Christian Hemp <c.hemp@phytec.de>
 *
 * 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 <debug_ll.h>
#include <common.h>
#include <linux/sizes.h>
#include <io.h>
#include <asm/barebox-arm-head.h>
#include <asm/barebox-arm.h>
#include <asm/sections.h>
#include <asm/cache.h>
#include <asm/mmu.h>
#include <mach/imx6-mmdc.h>
#include <mach/imx6.h>

static inline void setup_uart(void)
{
	void __iomem *iomuxbase = IOMEM(MX6_IOMUXC_BASE_ADDR);

	writel(0x4, iomuxbase + 0x01f8);

	imx6_ungate_all_peripherals();
	imx6_uart_setup_ll();

	putc_ll('>');
}

extern char __dtb_imx6q_phytec_pbaa03_start[];

static void __noreturn start_imx6q_phytec_pbaa03_common(uint32_t size)
{
	void *fdt;

	imx6_cpu_lowlevel_init();

	arm_setup_stack(0x00920000 - 8);

	if (IS_ENABLED(CONFIG_DEBUG_LL))
		setup_uart();

	fdt = __dtb_imx6q_phytec_pbaa03_start - get_runtime_offset();

	barebox_arm_entry(0x10000000, size, fdt);
}

ENTRY_FUNCTION(start_phytec_pbaa03_1gib, r0, r1, r2)
{
	start_imx6q_phytec_pbaa03_common(SZ_1G);
}

ENTRY_FUNCTION(start_phytec_pbaa03_1gib_1bank, r0, r1, r2)
{
	start_imx6q_phytec_pbaa03_common(SZ_1G);
}

ENTRY_FUNCTION(start_phytec_pbaa03_2gib, r0, r1, r2)
{
	start_imx6q_phytec_pbaa03_common(SZ_2G);
}