smp.c (c4a1f032ed35d744e3d74b8aebe8d85f29aecd88) smp.c (eb08375ea66e63c5e11dea69b43c5633d531ce81)
1/*
2 * linux/arch/arm/kernel/smp.c
3 *
4 * Copyright (C) 2002 ARM Limited, All Rights Reserved.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.

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40#include <asm/processor.h>
41#include <asm/sections.h>
42#include <asm/tlbflush.h>
43#include <asm/ptrace.h>
44#include <asm/localtimer.h>
45#include <asm/smp_plat.h>
46#include <asm/virt.h>
47#include <asm/mach/arch.h>
1/*
2 * linux/arch/arm/kernel/smp.c
3 *
4 * Copyright (C) 2002 ARM Limited, All Rights Reserved.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.

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40#include <asm/processor.h>
41#include <asm/sections.h>
42#include <asm/tlbflush.h>
43#include <asm/ptrace.h>
44#include <asm/localtimer.h>
45#include <asm/smp_plat.h>
46#include <asm/virt.h>
47#include <asm/mach/arch.h>
48#include <asm/mpu.h>
48
49/*
50 * as from 2.5, kernels no longer have an init_tasks structure
51 * so we need some other way of telling a new secondary core
52 * where to place its SVC stack
53 */
54struct secondary_data secondary_data;
55

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82{
83 int ret;
84
85 /*
86 * We need to tell the secondary core where to find
87 * its stack and the page tables.
88 */
89 secondary_data.stack = task_stack_page(idle) + THREAD_START_SP;
49
50/*
51 * as from 2.5, kernels no longer have an init_tasks structure
52 * so we need some other way of telling a new secondary core
53 * where to place its SVC stack
54 */
55struct secondary_data secondary_data;
56

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83{
84 int ret;
85
86 /*
87 * We need to tell the secondary core where to find
88 * its stack and the page tables.
89 */
90 secondary_data.stack = task_stack_page(idle) + THREAD_START_SP;
91#ifdef CONFIG_ARM_MPU
92 secondary_data.mpu_rgn_szr = mpu_rgn_info.rgns[MPU_RAM_REGION].drsr;
93#endif
94
90#ifdef CONFIG_MMU
91 secondary_data.pgdir = virt_to_phys(idmap_pgd);
92 secondary_data.swapper_pg_dir = virt_to_phys(swapper_pg_dir);
93#endif
94 __cpuc_flush_dcache_area(&secondary_data, sizeof(secondary_data));
95 outer_clean_range(__pa(&secondary_data), __pa(&secondary_data + 1));
96
97 /*

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109 if (!cpu_online(cpu)) {
110 pr_crit("CPU%u: failed to come online\n", cpu);
111 ret = -EIO;
112 }
113 } else {
114 pr_err("CPU%u: failed to boot: %d\n", cpu, ret);
115 }
116
95#ifdef CONFIG_MMU
96 secondary_data.pgdir = virt_to_phys(idmap_pgd);
97 secondary_data.swapper_pg_dir = virt_to_phys(swapper_pg_dir);
98#endif
99 __cpuc_flush_dcache_area(&secondary_data, sizeof(secondary_data));
100 outer_clean_range(__pa(&secondary_data), __pa(&secondary_data + 1));
101
102 /*

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114 if (!cpu_online(cpu)) {
115 pr_crit("CPU%u: failed to come online\n", cpu);
116 ret = -EIO;
117 }
118 } else {
119 pr_err("CPU%u: failed to boot: %d\n", cpu, ret);
120 }
121
117 secondary_data.stack = NULL;
118 secondary_data.pgdir = 0;
119
122
123 memset(&secondary_data, 0, sizeof(secondary_data));
120 return ret;
121}
122
123/* platform specific SMP operations */
124void __init smp_init_cpus(void)
125{
126 if (smp_ops.smp_init_cpus)
127 smp_ops.smp_init_cpus();

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125}
126
127/* platform specific SMP operations */
128void __init smp_init_cpus(void)
129{
130 if (smp_ops.smp_init_cpus)
131 smp_ops.smp_init_cpus();

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