summaryrefslogtreecommitdiffstats
path: root/arch/arm/mach-zynq/common.c
blob: 73e93687b81a1a60e3ca84daaca1fefb3216f582 (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
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
/*
 * This file contains common code that is intended to be used across
 * boards so that it's not replicated.
 *
 *  Copyright (C) 2011 Xilinx
 *
 * This software is licensed under the terms of the GNU General Public
 * License version 2, as published by the Free Software Foundation, and
 * may be copied, distributed, and modified under those terms.
 *
 * 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 <linux/init.h>
#include <linux/kernel.h>
#include <linux/cpumask.h>
#include <linux/platform_device.h>
#include <linux/clk.h>
#include <linux/of_irq.h>
#include <linux/of_platform.h>
#include <linux/of.h>

#include <asm/mach/arch.h>
#include <asm/mach/map.h>
#include <asm/mach-types.h>
#include <asm/page.h>
#include <asm/hardware/gic.h>
#include <asm/hardware/cache-l2x0.h>

#include <mach/zynq_soc.h>
#include <mach/clkdev.h>
#include "common.h"

static struct of_device_id zynq_of_bus_ids[] __initdata = {
	{ .compatible = "simple-bus", },
	{}
};

/**
 * xilinx_init_machine() - System specific initialization, intended to be
 *			   called from board specific initialization.
 */
static void __init xilinx_init_machine(void)
{
#ifdef CONFIG_CACHE_L2X0
	/*
	 * 64KB way size, 8-way associativity, parity disabled
	 */
	l2x0_init(PL310_L2CC_BASE, 0x02060000, 0xF0F0FFFF);
#endif

	of_platform_bus_probe(NULL, zynq_of_bus_ids, NULL);
}

/**
 * xilinx_irq_init() - Interrupt controller initialization for the GIC.
 */
static void __init xilinx_irq_init(void)
{
	gic_init(0, 29, SCU_GIC_DIST_BASE, SCU_GIC_CPU_BASE);
}

/* The minimum devices needed to be mapped before the VM system is up and
 * running include the GIC, UART and Timer Counter.
 */

static struct map_desc io_desc[] __initdata = {
	{
		.virtual	= TTC0_VIRT,
		.pfn		= __phys_to_pfn(TTC0_PHYS),
		.length		= SZ_4K,
		.type		= MT_DEVICE,
	}, {
		.virtual	= SCU_PERIPH_VIRT,
		.pfn		= __phys_to_pfn(SCU_PERIPH_PHYS),
		.length		= SZ_8K,
		.type		= MT_DEVICE,
	}, {
		.virtual	= PL310_L2CC_VIRT,
		.pfn		= __phys_to_pfn(PL310_L2CC_PHYS),
		.length		= SZ_4K,
		.type		= MT_DEVICE,
	},

#ifdef CONFIG_DEBUG_LL
	{
		.virtual	= UART0_VIRT,
		.pfn		= __phys_to_pfn(UART0_PHYS),
		.length		= SZ_4K,
		.type		= MT_DEVICE,
	},
#endif

};

/**
 * xilinx_map_io() - Create memory mappings needed for early I/O.
 */
static void __init xilinx_map_io(void)
{
	iotable_init(io_desc, ARRAY_SIZE(io_desc));
}

static const char *xilinx_dt_match[] = {
	"xlnx,zynq-ep107",
	NULL
};

MACHINE_START(XILINX_EP107, "Xilinx Zynq Platform")
	.map_io		= xilinx_map_io,
	.init_irq	= xilinx_irq_init,
	.init_machine	= xilinx_init_machine,
	.timer		= &xttcpss_sys_timer,
	.dt_compat	= xilinx_dt_match,
MACHINE_END
OpenPOWER on IntegriCloud