diff options
| -rw-r--r-- | arch/arm64/include/asm/cpu_ops.h | 33 | ||||
| -rw-r--r-- | arch/arm64/include/asm/smp.h | 11 | ||||
| -rw-r--r-- | arch/arm64/kernel/Makefile | 2 | ||||
| -rw-r--r-- | arch/arm64/kernel/cpu_ops.c | 47 | ||||
| -rw-r--r-- | arch/arm64/kernel/psci.c | 11 | ||||
| -rw-r--r-- | arch/arm64/kernel/smp.c | 39 | ||||
| -rw-r--r-- | arch/arm64/kernel/smp_spin_table.c | 11 |
7 files changed, 102 insertions, 52 deletions
diff --git a/arch/arm64/include/asm/cpu_ops.h b/arch/arm64/include/asm/cpu_ops.h new file mode 100644 index 0000000..3c60c8d --- /dev/null +++ b/arch/arm64/include/asm/cpu_ops.h @@ -0,0 +1,33 @@ +/* + * Copyright (C) 2013 ARM Ltd. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ +#ifndef __ASM_CPU_OPS_H +#define __ASM_CPU_OPS_H + +#include <linux/init.h> +#include <linux/threads.h> + +struct device_node; + +struct cpu_operations { + const char *name; + int (*cpu_init)(struct device_node *, unsigned int); + int (*cpu_prepare)(unsigned int); +}; + +extern const struct cpu_operations *cpu_ops[NR_CPUS]; +extern const struct cpu_operations * __init cpu_get_ops(const char *name); + +#endif /* ifndef __ASM_CPU_OPS_H */ diff --git a/arch/arm64/include/asm/smp.h b/arch/arm64/include/asm/smp.h index 4b8023c..7e34295 100644 --- a/arch/arm64/include/asm/smp.h +++ b/arch/arm64/include/asm/smp.h @@ -66,15 +66,4 @@ extern volatile unsigned long secondary_holding_pen_release; extern void arch_send_call_function_single_ipi(int cpu); extern void arch_send_call_function_ipi_mask(const struct cpumask *mask); -struct device_node; - -struct smp_enable_ops { - const char *name; - int (*init_cpu)(struct device_node *, int); - int (*prepare_cpu)(int); -}; - -extern const struct smp_enable_ops smp_spin_table_ops; -extern const struct smp_enable_ops smp_psci_ops; - #endif /* ifndef __ASM_SMP_H */ diff --git a/arch/arm64/kernel/Makefile b/arch/arm64/kernel/Makefile index 75a90c1..5ba2fd4 100644 --- a/arch/arm64/kernel/Makefile +++ b/arch/arm64/kernel/Makefile @@ -9,7 +9,7 @@ AFLAGS_head.o := -DTEXT_OFFSET=$(TEXT_OFFSET) arm64-obj-y := cputable.o debug-monitors.o entry.o irq.o fpsimd.o \ entry-fpsimd.o process.o ptrace.o setup.o signal.o \ sys.o stacktrace.o time.o traps.o io.o vdso.o \ - hyp-stub.o psci.o + hyp-stub.o psci.o cpu_ops.o arm64-obj-$(CONFIG_COMPAT) += sys32.o kuser32.o signal32.o \ sys_compat.o diff --git a/arch/arm64/kernel/cpu_ops.c b/arch/arm64/kernel/cpu_ops.c new file mode 100644 index 0000000..e2652aa --- /dev/null +++ b/arch/arm64/kernel/cpu_ops.c @@ -0,0 +1,47 @@ +/* + * CPU kernel entry/exit control + * + * Copyright (C) 2013 ARM Ltd. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#include <asm/cpu_ops.h> +#include <linux/string.h> + +extern const struct cpu_operations smp_spin_table_ops; +extern const struct cpu_operations cpu_psci_ops; + +const struct cpu_operations *cpu_ops[NR_CPUS]; + +static const struct cpu_operations *supported_cpu_ops[] __initconst = { +#ifdef CONFIG_SMP + &smp_spin_table_ops, + &cpu_psci_ops, +#endif + NULL, +}; + +const struct cpu_operations * __init cpu_get_ops(const char *name) +{ + const struct cpu_operations **ops = supported_cpu_ops; + + while (*ops) { + if (!strcmp(name, (*ops)->name)) + return *ops; + + ops++; + } + + return NULL; +} diff --git a/arch/arm64/kernel/psci.c b/arch/arm64/kernel/psci.c index 368b787..ccec2ca 100644 --- a/arch/arm64/kernel/psci.c +++ b/arch/arm64/kernel/psci.c @@ -20,6 +20,7 @@ #include <linux/smp.h> #include <asm/compiler.h> +#include <asm/cpu_ops.h> #include <asm/errno.h> #include <asm/psci.h> #include <asm/smp_plat.h> @@ -231,12 +232,12 @@ out_put_node: #ifdef CONFIG_SMP -static int __init smp_psci_init_cpu(struct device_node *dn, int cpu) +static int __init cpu_psci_cpu_init(struct device_node *dn, unsigned int cpu) { return 0; } -static int __init smp_psci_prepare_cpu(int cpu) +static int __init cpu_psci_cpu_prepare(unsigned int cpu) { int err; @@ -254,10 +255,10 @@ static int __init smp_psci_prepare_cpu(int cpu) return 0; } -const struct smp_enable_ops smp_psci_ops __initconst = { +const struct cpu_operations cpu_psci_ops = { .name = "psci", - .init_cpu = smp_psci_init_cpu, - .prepare_cpu = smp_psci_prepare_cpu, + .cpu_init = cpu_psci_cpu_init, + .cpu_prepare = cpu_psci_cpu_prepare, }; #endif diff --git a/arch/arm64/kernel/smp.c b/arch/arm64/kernel/smp.c index 78db90d..8965fb7 100644 --- a/arch/arm64/kernel/smp.c +++ b/arch/arm64/kernel/smp.c @@ -39,6 +39,7 @@ #include <asm/atomic.h> #include <asm/cacheflush.h> #include <asm/cputype.h> +#include <asm/cpu_ops.h> #include <asm/mmu_context.h> #include <asm/pgtable.h> #include <asm/pgalloc.h> @@ -232,28 +233,6 @@ void __init smp_prepare_boot_cpu(void) static void (*smp_cross_call)(const struct cpumask *, unsigned int); -static const struct smp_enable_ops *enable_ops[] __initconst = { - &smp_spin_table_ops, - &smp_psci_ops, - NULL, -}; - -static const struct smp_enable_ops *smp_enable_ops[NR_CPUS]; - -static const struct smp_enable_ops * __init smp_get_enable_ops(const char *name) -{ - const struct smp_enable_ops **ops = enable_ops; - - while (*ops) { - if (!strcmp(name, (*ops)->name)) - return *ops; - - ops++; - } - - return NULL; -} - /* * Enumerate the possible CPU set from the device tree and build the * cpu logical map array containing MPIDR values related to logical @@ -263,7 +242,7 @@ void __init smp_init_cpus(void) { const char *enable_method; struct device_node *dn = NULL; - int i, cpu = 1; + unsigned int i, cpu = 1; bool bootcpu_valid = false; while ((dn = of_find_node_by_type(dn, "cpu"))) { @@ -342,15 +321,15 @@ void __init smp_init_cpus(void) goto next; } - smp_enable_ops[cpu] = smp_get_enable_ops(enable_method); + cpu_ops[cpu] = cpu_get_ops(enable_method); - if (!smp_enable_ops[cpu]) { + if (!cpu_ops[cpu]) { pr_err("%s: invalid enable-method property: %s\n", dn->full_name, enable_method); goto next; } - if (smp_enable_ops[cpu]->init_cpu(dn, cpu)) + if (cpu_ops[cpu]->cpu_init(dn, cpu)) goto next; pr_debug("cpu logical map 0x%llx\n", hwid); @@ -380,8 +359,8 @@ next: void __init smp_prepare_cpus(unsigned int max_cpus) { - int cpu, err; - unsigned int ncores = num_possible_cpus(); + int err; + unsigned int cpu, ncores = num_possible_cpus(); /* * are we trying to boot more cores than exist? @@ -408,10 +387,10 @@ void __init smp_prepare_cpus(unsigned int max_cpus) if (cpu == smp_processor_id()) continue; - if (!smp_enable_ops[cpu]) + if (!cpu_ops[cpu]) continue; - err = smp_enable_ops[cpu]->prepare_cpu(cpu); + err = cpu_ops[cpu]->cpu_prepare(cpu); if (err) continue; diff --git a/arch/arm64/kernel/smp_spin_table.c b/arch/arm64/kernel/smp_spin_table.c index 7c35fa6..a8b76e4 100644 --- a/arch/arm64/kernel/smp_spin_table.c +++ b/arch/arm64/kernel/smp_spin_table.c @@ -21,10 +21,11 @@ #include <linux/smp.h> #include <asm/cacheflush.h> +#include <asm/cpu_ops.h> static phys_addr_t cpu_release_addr[NR_CPUS]; -static int __init smp_spin_table_init_cpu(struct device_node *dn, int cpu) +static int smp_spin_table_cpu_init(struct device_node *dn, unsigned int cpu) { /* * Determine the address from which the CPU is polling. @@ -40,7 +41,7 @@ static int __init smp_spin_table_init_cpu(struct device_node *dn, int cpu) return 0; } -static int __init smp_spin_table_prepare_cpu(int cpu) +static int smp_spin_table_cpu_prepare(unsigned int cpu) { void **release_addr; @@ -59,8 +60,8 @@ static int __init smp_spin_table_prepare_cpu(int cpu) return 0; } -const struct smp_enable_ops smp_spin_table_ops __initconst = { +const struct cpu_operations smp_spin_table_ops = { .name = "spin-table", - .init_cpu = smp_spin_table_init_cpu, - .prepare_cpu = smp_spin_table_prepare_cpu, + .cpu_init = smp_spin_table_cpu_init, + .cpu_prepare = smp_spin_table_cpu_prepare, }; |