Merge branch 'socfpga/smp' into next/smp
[cascardo/linux.git] / arch / arm / mach-socfpga / socfpga.c
1 /*
2  *  Copyright (C) 2012 Altera Corporation
3  *
4  * This program is free software; you can redistribute it and/or modify
5  * it under the terms of the GNU General Public License as published by
6  * the Free Software Foundation; either version 2 of the License, or
7  * (at your option) any later version.
8  *
9  * This program is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12  * GNU General Public License for more details.
13  *
14  * You should have received a copy of the GNU General Public License
15  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
16  */
17 #include <linux/dw_apb_timer.h>
18 #include <linux/of_address.h>
19 #include <linux/of_irq.h>
20 #include <linux/of_platform.h>
21
22 #include <asm/hardware/cache-l2x0.h>
23 #include <asm/hardware/gic.h>
24 #include <asm/mach/arch.h>
25 #include <asm/mach/map.h>
26
27 #include "core.h"
28
29 void __iomem *socfpga_scu_base_addr = ((void __iomem *)(SOCFPGA_SCU_VIRT_BASE));
30 void __iomem *sys_manager_base_addr;
31 void __iomem *rst_manager_base_addr;
32
33 static struct map_desc scu_io_desc __initdata = {
34         .virtual        = SOCFPGA_SCU_VIRT_BASE,
35         .pfn            = 0, /* run-time */
36         .length         = SZ_8K,
37         .type           = MT_DEVICE,
38 };
39
40 static void __init socfpga_scu_map_io(void)
41 {
42         unsigned long base;
43
44         /* Get SCU base */
45         asm("mrc p15, 4, %0, c15, c0, 0" : "=r" (base));
46
47         scu_io_desc.pfn = __phys_to_pfn(base);
48         iotable_init(&scu_io_desc, 1);
49 }
50
51 static void __init socfpga_map_io(void)
52 {
53         socfpga_scu_map_io();
54 }
55
56 const static struct of_device_id irq_match[] = {
57         { .compatible = "arm,cortex-a9-gic", .data = gic_of_init, },
58         {}
59 };
60
61 void __init socfpga_sysmgr_init(void)
62 {
63         struct device_node *np;
64
65         np = of_find_compatible_node(NULL, NULL, "altr,sys-mgr");
66         sys_manager_base_addr = of_iomap(np, 0);
67
68         np = of_find_compatible_node(NULL, NULL, "altr,rst-mgr");
69         rst_manager_base_addr = of_iomap(np, 0);
70 }
71
72 static void __init gic_init_irq(void)
73 {
74         of_irq_init(irq_match);
75         socfpga_sysmgr_init();
76 }
77
78 static void socfpga_cyclone5_restart(char mode, const char *cmd)
79 {
80         /* TODO: */
81 }
82
83 static void __init socfpga_cyclone5_init(void)
84 {
85         l2x0_of_init(0, ~0UL);
86         of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
87         socfpga_init_clocks();
88 }
89
90 static const char *altera_dt_match[] = {
91         "altr,socfpga",
92         "altr,socfpga-cyclone5",
93         NULL
94 };
95
96 DT_MACHINE_START(SOCFPGA, "Altera SOCFPGA")
97         .smp            = smp_ops(socfpga_smp_ops),
98         .map_io         = socfpga_map_io,
99         .init_irq       = gic_init_irq,
100         .handle_irq     = gic_handle_irq,
101         .timer          = &dw_apb_timer,
102         .init_machine   = socfpga_cyclone5_init,
103         .restart        = socfpga_cyclone5_restart,
104         .dt_compat      = altera_dt_match,
105 MACHINE_END