Kevin Hilman | a9434e9 | 2013-12-17 16:23:49 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2013 Linaro Ltd. |
| 3 | * Copyright (c) 2013 Hisilicon Limited. |
| 4 | * Based on arch/arm/mach-vexpress/platsmp.c, Copyright (C) 2002 ARM Ltd. |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify it |
| 7 | * under the terms and conditions of the GNU General Public License, |
| 8 | * version 2, as published by the Free Software Foundation. |
| 9 | */ |
| 10 | #include <linux/smp.h> |
| 11 | #include <linux/io.h> |
| 12 | #include <linux/of_address.h> |
| 13 | |
| 14 | #include <asm/cacheflush.h> |
| 15 | #include <asm/smp_plat.h> |
| 16 | #include <asm/smp_scu.h> |
| 17 | |
| 18 | #include "core.h" |
| 19 | |
| 20 | static void __iomem *ctrl_base; |
| 21 | |
| 22 | void hi3xxx_set_cpu_jump(int cpu, void *jump_addr) |
| 23 | { |
| 24 | cpu = cpu_logical_map(cpu); |
| 25 | if (!cpu || !ctrl_base) |
| 26 | return; |
| 27 | writel_relaxed(virt_to_phys(jump_addr), ctrl_base + ((cpu - 1) << 2)); |
| 28 | } |
| 29 | |
| 30 | int hi3xxx_get_cpu_jump(int cpu) |
| 31 | { |
| 32 | cpu = cpu_logical_map(cpu); |
| 33 | if (!cpu || !ctrl_base) |
| 34 | return 0; |
| 35 | return readl_relaxed(ctrl_base + ((cpu - 1) << 2)); |
| 36 | } |
| 37 | |
| 38 | static void __init hi3xxx_smp_prepare_cpus(unsigned int max_cpus) |
| 39 | { |
| 40 | struct device_node *np = NULL; |
| 41 | unsigned long base = 0; |
| 42 | u32 offset = 0; |
| 43 | void __iomem *scu_base = NULL; |
| 44 | |
| 45 | if (scu_a9_has_base()) { |
| 46 | base = scu_a9_get_base(); |
| 47 | scu_base = ioremap(base, SZ_4K); |
| 48 | if (!scu_base) { |
| 49 | pr_err("ioremap(scu_base) failed\n"); |
| 50 | return; |
| 51 | } |
| 52 | scu_enable(scu_base); |
| 53 | iounmap(scu_base); |
| 54 | } |
| 55 | if (!ctrl_base) { |
| 56 | np = of_find_compatible_node(NULL, NULL, "hisilicon,sysctrl"); |
| 57 | if (!np) { |
| 58 | pr_err("failed to find hisilicon,sysctrl node\n"); |
| 59 | return; |
| 60 | } |
| 61 | ctrl_base = of_iomap(np, 0); |
| 62 | if (!ctrl_base) { |
| 63 | pr_err("failed to map address\n"); |
| 64 | return; |
| 65 | } |
| 66 | if (of_property_read_u32(np, "smp-offset", &offset) < 0) { |
| 67 | pr_err("failed to find smp-offset property\n"); |
| 68 | return; |
| 69 | } |
| 70 | ctrl_base += offset; |
| 71 | } |
| 72 | } |
| 73 | |
| 74 | static int hi3xxx_boot_secondary(unsigned int cpu, struct task_struct *idle) |
| 75 | { |
Zhangfei Gao | 22bae42 | 2013-12-11 15:54:55 +0800 | [diff] [blame] | 76 | hi3xxx_set_cpu(cpu, true); |
Kevin Hilman | a9434e9 | 2013-12-17 16:23:49 -0800 | [diff] [blame] | 77 | hi3xxx_set_cpu_jump(cpu, secondary_startup); |
| 78 | arch_send_wakeup_ipi_mask(cpumask_of(cpu)); |
| 79 | return 0; |
| 80 | } |
| 81 | |
| 82 | struct smp_operations hi3xxx_smp_ops __initdata = { |
| 83 | .smp_prepare_cpus = hi3xxx_smp_prepare_cpus, |
| 84 | .smp_boot_secondary = hi3xxx_boot_secondary, |
Zhangfei Gao | 22bae42 | 2013-12-11 15:54:55 +0800 | [diff] [blame] | 85 | #ifdef CONFIG_HOTPLUG_CPU |
| 86 | .cpu_die = hi3xxx_cpu_die, |
| 87 | .cpu_kill = hi3xxx_cpu_kill, |
| 88 | #endif |
Kevin Hilman | a9434e9 | 2013-12-17 16:23:49 -0800 | [diff] [blame] | 89 | }; |