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John Linnb85a3ef2011-06-20 11:47:27 -06001/*
2 * This file contains common code that is intended to be used across
3 * boards so that it's not replicated.
4 *
5 * Copyright (C) 2011 Xilinx
6 *
7 * This software is licensed under the terms of the GNU General Public
8 * License version 2, as published by the Free Software Foundation, and
9 * may be copied, distributed, and modified under those terms.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 */
16
17#include <linux/init.h>
18#include <linux/kernel.h>
19#include <linux/cpumask.h>
20#include <linux/platform_device.h>
21#include <linux/clk.h>
Josh Cartwright0f586fb2012-11-08 12:04:26 -060022#include <linux/clk/zynq.h>
Michal Simeke9329002013-03-20 10:15:28 +010023#include <linux/clocksource.h>
Josh Cartwright0f586fb2012-11-08 12:04:26 -060024#include <linux/of_address.h>
John Linnb85a3ef2011-06-20 11:47:27 -060025#include <linux/of_irq.h>
26#include <linux/of_platform.h>
Arnd Bergmann3d64b442011-07-07 11:35:20 +000027#include <linux/of.h>
Michal Simek46f5b962014-01-31 12:55:06 +010028#include <linux/memblock.h>
Soren Brinkmann9f4f5d22013-10-31 09:10:18 -070029#include <linux/irqchip.h>
30#include <linux/irqchip/arm-gic.h>
John Linnb85a3ef2011-06-20 11:47:27 -060031
Arnd Bergmann3d64b442011-07-07 11:35:20 +000032#include <asm/mach/arch.h>
John Linnb85a3ef2011-06-20 11:47:27 -060033#include <asm/mach/map.h>
Josh Cartwright03e07592012-10-31 11:11:59 -060034#include <asm/mach/time.h>
Arnd Bergmann3d64b442011-07-07 11:35:20 +000035#include <asm/mach-types.h>
John Linnb85a3ef2011-06-20 11:47:27 -060036#include <asm/page.h>
Josh Cartwright9a45eb62012-11-19 11:38:29 -060037#include <asm/pgtable.h>
Michal Simek732078c2013-03-20 11:11:43 +010038#include <asm/smp_scu.h>
John Linnb85a3ef2011-06-20 11:47:27 -060039#include <asm/hardware/cache-l2x0.h>
40
John Linnb85a3ef2011-06-20 11:47:27 -060041#include "common.h"
42
Michal Simek732078c2013-03-20 11:11:43 +010043void __iomem *zynq_scu_base;
44
Michal Simek46f5b962014-01-31 12:55:06 +010045/**
46 * zynq_memory_init - Initialize special memory
47 *
48 * We need to stop things allocating the low memory as DMA can't work in
49 * the 1st 512K of memory.
50 */
51static void __init zynq_memory_init(void)
52{
53 if (!__pa(PAGE_OFFSET))
54 memblock_reserve(__pa(PAGE_OFFSET), __pa(swapper_pg_dir));
55}
56
Daniel Lezcano3e8ceca2013-09-21 18:41:02 +020057static struct platform_device zynq_cpuidle_device = {
58 .name = "cpuidle-zynq",
59};
60
John Linnb85a3ef2011-06-20 11:47:27 -060061/**
Michal Simek889faa82013-03-27 13:07:00 +010062 * zynq_init_machine - System specific initialization, intended to be
63 * called from board specific initialization.
John Linnb85a3ef2011-06-20 11:47:27 -060064 */
Michal Simek889faa82013-03-27 13:07:00 +010065static void __init zynq_init_machine(void)
John Linnb85a3ef2011-06-20 11:47:27 -060066{
John Linnb85a3ef2011-06-20 11:47:27 -060067 /*
68 * 64KB way size, 8-way associativity, parity disabled
69 */
Josh Cartwright0fcfdbc2012-10-23 17:34:22 -050070 l2x0_of_init(0x02060000, 0xF0F0FFFF);
John Linnb85a3ef2011-06-20 11:47:27 -060071
Soren Brinkmannf4d5d7b2013-10-31 09:10:17 -070072 of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
Daniel Lezcano3e8ceca2013-09-21 18:41:02 +020073
74 platform_device_register(&zynq_cpuidle_device);
John Linnb85a3ef2011-06-20 11:47:27 -060075}
76
Michal Simek889faa82013-03-27 13:07:00 +010077static void __init zynq_timer_init(void)
Josh Cartwright03e07592012-10-31 11:11:59 -060078{
Michal Simek64b889b2013-03-27 12:37:53 +010079 zynq_slcr_init();
Michal Simekc5263bb2013-03-20 10:24:59 +010080 clocksource_of_init();
Josh Cartwright03e07592012-10-31 11:11:59 -060081}
82
Michal Simek732078c2013-03-20 11:11:43 +010083static struct map_desc zynq_cortex_a9_scu_map __initdata = {
84 .length = SZ_256,
85 .type = MT_DEVICE,
86};
87
88static void __init zynq_scu_map_io(void)
89{
90 unsigned long base;
91
92 base = scu_a9_get_base();
93 zynq_cortex_a9_scu_map.pfn = __phys_to_pfn(base);
94 /* Expected address is in vmalloc area that's why simple assign here */
95 zynq_cortex_a9_scu_map.virtual = base;
96 iotable_init(&zynq_cortex_a9_scu_map, 1);
97 zynq_scu_base = (void __iomem *)base;
98 BUG_ON(!zynq_scu_base);
99}
100
John Linnb85a3ef2011-06-20 11:47:27 -0600101/**
Michal Simek889faa82013-03-27 13:07:00 +0100102 * zynq_map_io - Create memory mappings needed for early I/O.
John Linnb85a3ef2011-06-20 11:47:27 -0600103 */
Michal Simek889faa82013-03-27 13:07:00 +0100104static void __init zynq_map_io(void)
John Linnb85a3ef2011-06-20 11:47:27 -0600105{
Josh Cartwright385f02b2012-11-19 10:16:01 -0600106 debug_ll_io_init();
Michal Simek732078c2013-03-20 11:11:43 +0100107 zynq_scu_map_io();
John Linnb85a3ef2011-06-20 11:47:27 -0600108}
Arnd Bergmann3d64b442011-07-07 11:35:20 +0000109
Soren Brinkmann9f4f5d22013-10-31 09:10:18 -0700110static void __init zynq_irq_init(void)
111{
112 gic_arch_extn.flags = IRQCHIP_SKIP_SET_WAKE | IRQCHIP_MASK_ON_SUSPEND;
113 irqchip_init();
114}
115
Vincent Stehléfe08bf92013-06-27 14:42:41 +0200116static void zynq_system_reset(enum reboot_mode mode, const char *cmd)
Michal Simek96790f02013-03-20 11:42:15 +0100117{
118 zynq_slcr_system_reset();
119}
120
Michal Simek889faa82013-03-27 13:07:00 +0100121static const char * const zynq_dt_match[] = {
Josh Cartwrighte06f1a92012-10-31 12:24:48 -0600122 "xlnx,zynq-7000",
Arnd Bergmann3d64b442011-07-07 11:35:20 +0000123 NULL
124};
125
Arnd Bergmann514a5902013-06-13 14:13:37 +0200126DT_MACHINE_START(XILINX_EP107, "Xilinx Zynq Platform")
Michal Simekaa7eb2b2013-03-20 13:50:12 +0100127 .smp = smp_ops(zynq_smp_ops),
Michal Simek889faa82013-03-27 13:07:00 +0100128 .map_io = zynq_map_io,
Soren Brinkmann9f4f5d22013-10-31 09:10:18 -0700129 .init_irq = zynq_irq_init,
Michal Simek889faa82013-03-27 13:07:00 +0100130 .init_machine = zynq_init_machine,
131 .init_time = zynq_timer_init,
132 .dt_compat = zynq_dt_match,
Michal Simek46f5b962014-01-31 12:55:06 +0100133 .reserve = zynq_memory_init,
Michal Simek96790f02013-03-20 11:42:15 +0100134 .restart = zynq_system_reset,
Arnd Bergmann3d64b442011-07-07 11:35:20 +0000135MACHINE_END