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.
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.
10 #include <linux/smp.h>
12 #include <linux/of_address.h>
14 #include <asm/cacheflush.h>
15 #include <asm/smp_plat.h>
16 #include <asm/smp_scu.h>
20 #define HIX5HD2_BOOT_ADDRESS 0xffff0000
22 static void __iomem
*ctrl_base
;
24 void hi3xxx_set_cpu_jump(int cpu
, void *jump_addr
)
26 cpu
= cpu_logical_map(cpu
);
27 if (!cpu
|| !ctrl_base
)
29 writel_relaxed(virt_to_phys(jump_addr
), ctrl_base
+ ((cpu
- 1) << 2));
32 int hi3xxx_get_cpu_jump(int cpu
)
34 cpu
= cpu_logical_map(cpu
);
35 if (!cpu
|| !ctrl_base
)
37 return readl_relaxed(ctrl_base
+ ((cpu
- 1) << 2));
40 static void __init
hisi_enable_scu_a9(void)
42 unsigned long base
= 0;
43 void __iomem
*scu_base
= NULL
;
45 if (scu_a9_has_base()) {
46 base
= scu_a9_get_base();
47 scu_base
= ioremap(base
, SZ_4K
);
49 pr_err("ioremap(scu_base) failed\n");
57 static void __init
hi3xxx_smp_prepare_cpus(unsigned int max_cpus
)
59 struct device_node
*np
= NULL
;
64 np
= of_find_compatible_node(NULL
, NULL
, "hisilicon,sysctrl");
66 pr_err("failed to find hisilicon,sysctrl node\n");
69 ctrl_base
= of_iomap(np
, 0);
71 pr_err("failed to map address\n");
74 if (of_property_read_u32(np
, "smp-offset", &offset
) < 0) {
75 pr_err("failed to find smp-offset property\n");
82 static int hi3xxx_boot_secondary(unsigned int cpu
, struct task_struct
*idle
)
84 hi3xxx_set_cpu(cpu
, true);
85 hi3xxx_set_cpu_jump(cpu
, secondary_startup
);
86 arch_send_wakeup_ipi_mask(cpumask_of(cpu
));
90 struct smp_operations hi3xxx_smp_ops __initdata
= {
91 .smp_prepare_cpus
= hi3xxx_smp_prepare_cpus
,
92 .smp_boot_secondary
= hi3xxx_boot_secondary
,
93 #ifdef CONFIG_HOTPLUG_CPU
94 .cpu_die
= hi3xxx_cpu_die
,
95 .cpu_kill
= hi3xxx_cpu_kill
,
99 static void __init
hix5hd2_smp_prepare_cpus(unsigned int max_cpus
)
101 hisi_enable_scu_a9();
104 void hix5hd2_set_scu_boot_addr(phys_addr_t start_addr
, phys_addr_t jump_addr
)
108 virt
= ioremap(start_addr
, PAGE_SIZE
);
110 writel_relaxed(0xe51ff004, virt
); /* ldr pc, [rc, #-4] */
111 writel_relaxed(jump_addr
, virt
+ 4); /* pc jump phy address */
115 static int hix5hd2_boot_secondary(unsigned int cpu
, struct task_struct
*idle
)
117 phys_addr_t jumpaddr
;
119 jumpaddr
= virt_to_phys(hix5hd2_secondary_startup
);
120 hix5hd2_set_scu_boot_addr(HIX5HD2_BOOT_ADDRESS
, jumpaddr
);
121 hix5hd2_set_cpu(cpu
, true);
122 arch_send_wakeup_ipi_mask(cpumask_of(cpu
));
127 struct smp_operations hix5hd2_smp_ops __initdata
= {
128 .smp_prepare_cpus
= hix5hd2_smp_prepare_cpus
,
129 .smp_boot_secondary
= hix5hd2_boot_secondary
,
130 #ifdef CONFIG_HOTPLUG_CPU
131 .cpu_die
= hix5hd2_cpu_die
,
135 CPU_METHOD_OF_DECLARE(hi3xxx_smp
, "hisilicon,hi3620-smp", &hi3xxx_smp_ops
);
136 CPU_METHOD_OF_DECLARE(hix5hd2_smp
, "hisilicon,hix5hd2-smp", &hix5hd2_smp_ops
);