From 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 Mon Sep 17 00:00:00 2001 From: Yunhong Jiang Date: Tue, 4 Aug 2015 12:17:53 -0700 Subject: Add the rt linux 4.1.3-rt3 as base Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang --- kernel/arch/arm/mach-shmobile/pm-rcar-gen2.c | 115 +++++++++++++++++++++++++++ 1 file changed, 115 insertions(+) create mode 100644 kernel/arch/arm/mach-shmobile/pm-rcar-gen2.c (limited to 'kernel/arch/arm/mach-shmobile/pm-rcar-gen2.c') diff --git a/kernel/arch/arm/mach-shmobile/pm-rcar-gen2.c b/kernel/arch/arm/mach-shmobile/pm-rcar-gen2.c new file mode 100644 index 000000000..6815781ad --- /dev/null +++ b/kernel/arch/arm/mach-shmobile/pm-rcar-gen2.c @@ -0,0 +1,115 @@ +/* + * R-Car Generation 2 Power management support + * + * Copyright (C) 2013 - 2015 Renesas Electronics Corporation + * Copyright (C) 2011 Renesas Solutions Corp. + * Copyright (C) 2011 Magnus Damm + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + */ + +#include +#include +#include +#include +#include "common.h" +#include "pm-rcar.h" +#include "rcar-gen2.h" + +/* RST */ +#define RST 0xe6160000 +#define CA15BAR 0x0020 +#define CA7BAR 0x0030 +#define CA15RESCNT 0x0040 +#define CA7RESCNT 0x0044 + +/* On-chip RAM */ +#define MERAM 0xe8080000 +#define RAM 0xe6300000 + +/* SYSC */ +#define SYSCIER 0x0c +#define SYSCIMR 0x10 + +#if defined(CONFIG_SMP) + +static void __init rcar_gen2_sysc_init(u32 syscier) +{ + void __iomem *base = rcar_sysc_init(0xe6180000); + + /* enable all interrupt sources, but do not use interrupt handler */ + iowrite32(syscier, base + SYSCIER); + iowrite32(0, base + SYSCIMR); +} + +#else /* CONFIG_SMP */ + +static inline void rcar_gen2_sysc_init(u32 syscier) {} + +#endif /* CONFIG_SMP */ + +void __init rcar_gen2_pm_init(void) +{ + void __iomem *p; + u32 bar; + static int once; + struct device_node *np, *cpus; + bool has_a7 = false; + bool has_a15 = false; + phys_addr_t boot_vector_addr = 0; + u32 syscier = 0; + + if (once++) + return; + + cpus = of_find_node_by_path("/cpus"); + if (!cpus) + return; + + for_each_child_of_node(cpus, np) { + if (of_device_is_compatible(np, "arm,cortex-a15")) + has_a15 = true; + else if (of_device_is_compatible(np, "arm,cortex-a7")) + has_a7 = true; + } + + if (of_machine_is_compatible("renesas,r8a7790")) { + boot_vector_addr = MERAM; + syscier = 0x013111ef; + + } else if (of_machine_is_compatible("renesas,r8a7791")) { + boot_vector_addr = RAM; + syscier = 0x00111003; + } + + /* RAM for jump stub, because BAR requires 256KB aligned address */ + p = ioremap_nocache(boot_vector_addr, shmobile_boot_size); + memcpy_toio(p, shmobile_boot_vector, shmobile_boot_size); + iounmap(p); + + /* setup reset vectors */ + p = ioremap_nocache(RST, 0x63); + bar = (boot_vector_addr >> 8) & 0xfffffc00; + if (has_a15) { + writel_relaxed(bar, p + CA15BAR); + writel_relaxed(bar | 0x10, p + CA15BAR); + + /* de-assert reset for CA15 CPUs */ + writel_relaxed((readl_relaxed(p + CA15RESCNT) & ~0x0f) | + 0xa5a50000, p + CA15RESCNT); + } + if (has_a7) { + writel_relaxed(bar, p + CA7BAR); + writel_relaxed(bar | 0x10, p + CA7BAR); + + /* de-assert reset for CA7 CPUs */ + writel_relaxed((readl_relaxed(p + CA7RESCNT) & ~0x0f) | + 0x5a5a0000, p + CA7RESCNT); + } + iounmap(p); + + rcar_gen2_sysc_init(syscier); + shmobile_smp_apmu_suspend_init(); +} -- cgit 1.2.3-korg