summaryrefslogtreecommitdiff
path: root/arch/arm/mach-zynq/common.c
blob: 5441323e2a6861a6ab2380d6aca548b1d57e65e4 (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
119
120
121
122
123
124
125
126
127
128
129
130
/*
 * 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/time.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 "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)
{
	/*
	 * 64KB way size, 8-way associativity, parity disabled
	 */
	l2x0_of_init(0x02060000, 0xF0F0FFFF);

	of_platform_bus_probe(NULL, zynq_of_bus_ids, NULL);
}

static struct of_device_id irq_match[] __initdata = {
	{ .compatible = "arm,cortex-a9-gic", .data = gic_of_init, },
	{ }
};

/**
 * xilinx_irq_init() - Interrupt controller initialization for the GIC.
 */
static void __init xilinx_irq_init(void)
{
	of_irq_init(irq_match);
}

/* 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		= TTC0_SIZE,
		.type		= MT_DEVICE,
	}, {
		.virtual	= SCU_PERIPH_VIRT,
		.pfn		= __phys_to_pfn(SCU_PERIPH_PHYS),
		.length		= SCU_PERIPH_SIZE,
		.type		= MT_DEVICE,
	},

#ifdef CONFIG_DEBUG_LL
	{
		.virtual	= LL_UART_VADDR,
		.pfn		= __phys_to_pfn(LL_UART_PADDR),
		.length		= UART_SIZE,
		.type		= MT_DEVICE,
	},
#endif

};

static void __init xilinx_zynq_timer_init(void)
{
	xttcpss_timer_init();
}

/*
 * Instantiate and initialize the system timer structure
 */
static struct sys_timer xttcpss_sys_timer = {
	.init		= xilinx_zynq_timer_init,
};

/**
 * 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-zc702",
	"xlnx,zynq-7000",
	NULL
};

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