x86: Make the vdso2c compiler use the host architecture headers
[linux/fpc-iii.git] / arch / arm / mach-realview / platsmp-dt.c
blob6964e88760614ba1f8fa60c7f6fd12f3b07dfe20
1 /*
2 * Copyright (C) 2015 Linus Walleij
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
7 */
8 #include <linux/smp.h>
9 #include <linux/io.h>
10 #include <linux/of.h>
11 #include <linux/of_address.h>
12 #include <linux/regmap.h>
13 #include <linux/mfd/syscon.h>
15 #include <asm/cacheflush.h>
16 #include <asm/smp_plat.h>
17 #include <asm/smp_scu.h>
19 #include <plat/platsmp.h>
21 #include "core.h"
23 #define REALVIEW_SYS_FLAGSSET_OFFSET 0x30
25 static const struct of_device_id realview_scu_match[] = {
26 { .compatible = "arm,arm11mp-scu", },
27 { .compatible = "arm,cortex-a9-scu", },
28 { .compatible = "arm,cortex-a5-scu", },
29 { }
32 static const struct of_device_id realview_syscon_match[] = {
33 { .compatible = "arm,core-module-integrator", },
34 { .compatible = "arm,realview-eb-syscon", },
35 { .compatible = "arm,realview-pb11mp-syscon", },
36 { .compatible = "arm,realview-pbx-syscon", },
37 { },
40 static void __init realview_smp_prepare_cpus(unsigned int max_cpus)
42 struct device_node *np;
43 void __iomem *scu_base;
44 struct regmap *map;
45 unsigned int ncores;
46 int i;
48 np = of_find_matching_node(NULL, realview_scu_match);
49 if (!np) {
50 pr_err("PLATSMP: No SCU base address\n");
51 return;
53 scu_base = of_iomap(np, 0);
54 of_node_put(np);
55 if (!scu_base) {
56 pr_err("PLATSMP: No SCU remap\n");
57 return;
60 scu_enable(scu_base);
61 ncores = scu_get_core_count(scu_base);
62 pr_info("SCU: %d cores detected\n", ncores);
63 for (i = 0; i < ncores; i++)
64 set_cpu_possible(i, true);
65 iounmap(scu_base);
67 /* The syscon contains the magic SMP start address registers */
68 np = of_find_matching_node(NULL, realview_syscon_match);
69 if (!np) {
70 pr_err("PLATSMP: No syscon match\n");
71 return;
73 map = syscon_node_to_regmap(np);
74 if (IS_ERR(map)) {
75 pr_err("PLATSMP: No syscon regmap\n");
76 return;
78 /* Put the boot address in this magic register */
79 regmap_write(map, REALVIEW_SYS_FLAGSSET_OFFSET,
80 virt_to_phys(versatile_secondary_startup));
83 static const struct smp_operations realview_dt_smp_ops __initconst = {
84 .smp_prepare_cpus = realview_smp_prepare_cpus,
85 .smp_secondary_init = versatile_secondary_init,
86 .smp_boot_secondary = versatile_boot_secondary,
87 #ifdef CONFIG_HOTPLUG_CPU
88 .cpu_die = realview_cpu_die,
89 #endif
91 CPU_METHOD_OF_DECLARE(realview_smp, "arm,realview-smp", &realview_dt_smp_ops);