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 #include <linux/delay.h> 14 15 #include <asm/cacheflush.h> 16 #include <asm/smp_plat.h> 17 #include <asm/smp_scu.h> 18 #include <asm/mach/map.h> 19 20 #include "core.h" 21 22 #define HIX5HD2_BOOT_ADDRESS 0xffff0000 23 24 static void __iomem *ctrl_base; 25 26 void hi3xxx_set_cpu_jump(int cpu, void *jump_addr) 27 { 28 cpu = cpu_logical_map(cpu); 29 if (!cpu || !ctrl_base) 30 return; 31 writel_relaxed(__pa_symbol(jump_addr), ctrl_base + ((cpu - 1) << 2)); 32 } 33 34 int hi3xxx_get_cpu_jump(int cpu) 35 { 36 cpu = cpu_logical_map(cpu); 37 if (!cpu || !ctrl_base) 38 return 0; 39 return readl_relaxed(ctrl_base + ((cpu - 1) << 2)); 40 } 41 42 static void __init hisi_enable_scu_a9(void) 43 { 44 unsigned long base = 0; 45 void __iomem *scu_base = NULL; 46 47 if (scu_a9_has_base()) { 48 base = scu_a9_get_base(); 49 scu_base = ioremap(base, SZ_4K); 50 if (!scu_base) { 51 pr_err("ioremap(scu_base) failed\n"); 52 return; 53 } 54 scu_enable(scu_base); 55 iounmap(scu_base); 56 } 57 } 58 59 static void __init hi3xxx_smp_prepare_cpus(unsigned int max_cpus) 60 { 61 struct device_node *np = NULL; 62 u32 offset = 0; 63 64 hisi_enable_scu_a9(); 65 if (!ctrl_base) { 66 np = of_find_compatible_node(NULL, NULL, "hisilicon,sysctrl"); 67 if (!np) { 68 pr_err("failed to find hisilicon,sysctrl node\n"); 69 return; 70 } 71 ctrl_base = of_iomap(np, 0); 72 if (!ctrl_base) { 73 pr_err("failed to map address\n"); 74 return; 75 } 76 if (of_property_read_u32(np, "smp-offset", &offset) < 0) { 77 pr_err("failed to find smp-offset property\n"); 78 return; 79 } 80 ctrl_base += offset; 81 } 82 } 83 84 static int hi3xxx_boot_secondary(unsigned int cpu, struct task_struct *idle) 85 { 86 hi3xxx_set_cpu(cpu, true); 87 hi3xxx_set_cpu_jump(cpu, secondary_startup); 88 arch_send_wakeup_ipi_mask(cpumask_of(cpu)); 89 return 0; 90 } 91 92 static const struct smp_operations hi3xxx_smp_ops __initconst = { 93 .smp_prepare_cpus = hi3xxx_smp_prepare_cpus, 94 .smp_boot_secondary = hi3xxx_boot_secondary, 95 #ifdef CONFIG_HOTPLUG_CPU 96 .cpu_die = hi3xxx_cpu_die, 97 .cpu_kill = hi3xxx_cpu_kill, 98 #endif 99 }; 100 101 static void __init hisi_common_smp_prepare_cpus(unsigned int max_cpus) 102 { 103 hisi_enable_scu_a9(); 104 } 105 106 static void hix5hd2_set_scu_boot_addr(phys_addr_t start_addr, phys_addr_t jump_addr) 107 { 108 void __iomem *virt; 109 110 virt = ioremap(start_addr, PAGE_SIZE); 111 112 writel_relaxed(0xe51ff004, virt); /* ldr pc, [rc, #-4] */ 113 writel_relaxed(jump_addr, virt + 4); /* pc jump phy address */ 114 iounmap(virt); 115 } 116 117 static int hix5hd2_boot_secondary(unsigned int cpu, struct task_struct *idle) 118 { 119 phys_addr_t jumpaddr; 120 121 jumpaddr = __pa_symbol(secondary_startup); 122 hix5hd2_set_scu_boot_addr(HIX5HD2_BOOT_ADDRESS, jumpaddr); 123 hix5hd2_set_cpu(cpu, true); 124 arch_send_wakeup_ipi_mask(cpumask_of(cpu)); 125 return 0; 126 } 127 128 129 static const struct smp_operations hix5hd2_smp_ops __initconst = { 130 .smp_prepare_cpus = hisi_common_smp_prepare_cpus, 131 .smp_boot_secondary = hix5hd2_boot_secondary, 132 #ifdef CONFIG_HOTPLUG_CPU 133 .cpu_die = hix5hd2_cpu_die, 134 #endif 135 }; 136 137 138 #define SC_SCTL_REMAP_CLR 0x00000100 139 #define HIP01_BOOT_ADDRESS 0x80000000 140 #define REG_SC_CTRL 0x000 141 142 static void hip01_set_boot_addr(phys_addr_t start_addr, phys_addr_t jump_addr) 143 { 144 void __iomem *virt; 145 146 virt = phys_to_virt(start_addr); 147 148 writel_relaxed(0xe51ff004, virt); 149 writel_relaxed(jump_addr, virt + 4); 150 } 151 152 static int hip01_boot_secondary(unsigned int cpu, struct task_struct *idle) 153 { 154 phys_addr_t jumpaddr; 155 unsigned int remap_reg_value = 0; 156 struct device_node *node; 157 158 159 jumpaddr = __pa_symbol(secondary_startup); 160 hip01_set_boot_addr(HIP01_BOOT_ADDRESS, jumpaddr); 161 162 node = of_find_compatible_node(NULL, NULL, "hisilicon,hip01-sysctrl"); 163 if (WARN_ON(!node)) 164 return -1; 165 ctrl_base = of_iomap(node, 0); 166 167 /* set the secondary core boot from DDR */ 168 remap_reg_value = readl_relaxed(ctrl_base + REG_SC_CTRL); 169 barrier(); 170 remap_reg_value |= SC_SCTL_REMAP_CLR; 171 barrier(); 172 writel_relaxed(remap_reg_value, ctrl_base + REG_SC_CTRL); 173 174 hip01_set_cpu(cpu, true); 175 176 return 0; 177 } 178 179 static const struct smp_operations hip01_smp_ops __initconst = { 180 .smp_prepare_cpus = hisi_common_smp_prepare_cpus, 181 .smp_boot_secondary = hip01_boot_secondary, 182 }; 183 184 CPU_METHOD_OF_DECLARE(hi3xxx_smp, "hisilicon,hi3620-smp", &hi3xxx_smp_ops); 185 CPU_METHOD_OF_DECLARE(hix5hd2_smp, "hisilicon,hix5hd2-smp", &hix5hd2_smp_ops); 186 CPU_METHOD_OF_DECLARE(hip01_smp, "hisilicon,hip01-smp", &hip01_smp_ops); 187