2 * R-Car Generation 2 Power management support
4 * Copyright (C) 2013 - 2015 Renesas Electronics Corporation
5 * Copyright (C) 2011 Renesas Solutions Corp.
6 * Copyright (C) 2011 Magnus Damm
8 * This file is subject to the terms and conditions of the GNU General Public
9 * License. See the file "COPYING" in the main directory of this archive
13 #include <linux/kernel.h>
15 #include <linux/smp.h>
16 #include <linux/soc/renesas/rcar-sysc.h>
19 #include "rcar-gen2.h"
22 #define RST 0xe6160000
23 #define CA15BAR 0x0020
25 #define CA15RESCNT 0x0040
26 #define CA7RESCNT 0x0044
29 #define ICRAM1 0xe63c0000 /* Inter Connect RAM1 (4 KiB) */
35 #if defined(CONFIG_SMP)
37 static void __init rcar_gen2_sysc_init(u32 syscier)
39 void __iomem *base = rcar_sysc_init(0xe6180000);
41 /* enable all interrupt sources, but do not use interrupt handler */
42 iowrite32(syscier, base + SYSCIER);
43 iowrite32(0, base + SYSCIMR);
46 #else /* CONFIG_SMP */
48 static inline void rcar_gen2_sysc_init(u32 syscier) {}
50 #endif /* CONFIG_SMP */
52 void __init rcar_gen2_pm_init(void)
57 struct device_node *np, *cpus;
60 phys_addr_t boot_vector_addr = ICRAM1;
66 cpus = of_find_node_by_path("/cpus");
70 for_each_child_of_node(cpus, np) {
71 if (of_device_is_compatible(np, "arm,cortex-a15"))
73 else if (of_device_is_compatible(np, "arm,cortex-a7"))
77 if (of_machine_is_compatible("renesas,r8a7790"))
79 else if (of_machine_is_compatible("renesas,r8a7791"))
82 /* RAM for jump stub, because BAR requires 256KB aligned address */
83 p = ioremap_nocache(boot_vector_addr, shmobile_boot_size);
84 memcpy_toio(p, shmobile_boot_vector, shmobile_boot_size);
87 /* setup reset vectors */
88 p = ioremap_nocache(RST, 0x63);
89 bar = (boot_vector_addr >> 8) & 0xfffffc00;
91 writel_relaxed(bar, p + CA15BAR);
92 writel_relaxed(bar | 0x10, p + CA15BAR);
94 /* de-assert reset for CA15 CPUs */
95 writel_relaxed((readl_relaxed(p + CA15RESCNT) & ~0x0f) |
96 0xa5a50000, p + CA15RESCNT);
99 writel_relaxed(bar, p + CA7BAR);
100 writel_relaxed(bar | 0x10, p + CA7BAR);
102 /* de-assert reset for CA7 CPUs */
103 writel_relaxed((readl_relaxed(p + CA7RESCNT) & ~0x0f) |
104 0x5a5a0000, p + CA7RESCNT);
108 rcar_gen2_sysc_init(syscier);
109 shmobile_smp_apmu_suspend_init();