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 rcar_sysc_init(0xe6180000, syscier);
42 #else /* CONFIG_SMP */
44 static inline void rcar_gen2_sysc_init(u32 syscier) {}
46 #endif /* CONFIG_SMP */
48 void __init rcar_gen2_pm_init(void)
53 struct device_node *np, *cpus;
56 phys_addr_t boot_vector_addr = ICRAM1;
62 cpus = of_find_node_by_path("/cpus");
66 for_each_child_of_node(cpus, np) {
67 if (of_device_is_compatible(np, "arm,cortex-a15"))
69 else if (of_device_is_compatible(np, "arm,cortex-a7"))
73 if (of_machine_is_compatible("renesas,r8a7790"))
75 else if (of_machine_is_compatible("renesas,r8a7791"))
78 /* RAM for jump stub, because BAR requires 256KB aligned address */
79 p = ioremap_nocache(boot_vector_addr, shmobile_boot_size);
80 memcpy_toio(p, shmobile_boot_vector, shmobile_boot_size);
83 /* setup reset vectors */
84 p = ioremap_nocache(RST, 0x63);
85 bar = (boot_vector_addr >> 8) & 0xfffffc00;
87 writel_relaxed(bar, p + CA15BAR);
88 writel_relaxed(bar | 0x10, p + CA15BAR);
90 /* de-assert reset for CA15 CPUs */
91 writel_relaxed((readl_relaxed(p + CA15RESCNT) & ~0x0f) |
92 0xa5a50000, p + CA15RESCNT);
95 writel_relaxed(bar, p + CA7BAR);
96 writel_relaxed(bar | 0x10, p + CA7BAR);
98 /* de-assert reset for CA7 CPUs */
99 writel_relaxed((readl_relaxed(p + CA7RESCNT) & ~0x0f) |
100 0x5a5a0000, p + CA7RESCNT);
104 rcar_gen2_sysc_init(syscier);
105 shmobile_smp_apmu_suspend_init();