| 1 | #ifndef ASM_X86__SMP_H |
| 2 | #define ASM_X86__SMP_H |
| 3 | #ifndef __ASSEMBLY__ |
| 4 | #include <linux/cpumask.h> |
| 5 | #include <linux/init.h> |
| 6 | #include <asm/percpu.h> |
| 7 | |
| 8 | /* |
| 9 | * We need the APIC definitions automatically as part of 'smp.h' |
| 10 | */ |
| 11 | #ifdef CONFIG_X86_LOCAL_APIC |
| 12 | # include <asm/mpspec.h> |
| 13 | # include <asm/apic.h> |
| 14 | # ifdef CONFIG_X86_IO_APIC |
| 15 | # include <asm/io_apic.h> |
| 16 | # endif |
| 17 | #endif |
| 18 | #include <asm/pda.h> |
| 19 | #include <asm/thread_info.h> |
| 20 | |
| 21 | extern cpumask_t cpu_callout_map; |
| 22 | extern cpumask_t cpu_initialized; |
| 23 | extern cpumask_t cpu_callin_map; |
| 24 | |
| 25 | extern void (*mtrr_hook)(void); |
| 26 | extern void zap_low_mappings(void); |
| 27 | |
| 28 | extern int __cpuinit get_local_pda(int cpu); |
| 29 | |
| 30 | extern int smp_num_siblings; |
| 31 | extern unsigned int num_processors; |
| 32 | extern cpumask_t cpu_initialized; |
| 33 | |
| 34 | DECLARE_PER_CPU(cpumask_t, cpu_sibling_map); |
| 35 | DECLARE_PER_CPU(cpumask_t, cpu_core_map); |
| 36 | DECLARE_PER_CPU(u16, cpu_llc_id); |
| 37 | #ifdef CONFIG_X86_32 |
| 38 | DECLARE_PER_CPU(int, cpu_number); |
| 39 | #endif |
| 40 | |
| 41 | DECLARE_EARLY_PER_CPU(u16, x86_cpu_to_apicid); |
| 42 | DECLARE_EARLY_PER_CPU(u16, x86_bios_cpu_apicid); |
| 43 | |
| 44 | /* Static state in head.S used to set up a CPU */ |
| 45 | extern struct { |
| 46 | void *sp; |
| 47 | unsigned short ss; |
| 48 | } stack_start; |
| 49 | |
| 50 | struct smp_ops { |
| 51 | void (*smp_prepare_boot_cpu)(void); |
| 52 | void (*smp_prepare_cpus)(unsigned max_cpus); |
| 53 | void (*smp_cpus_done)(unsigned max_cpus); |
| 54 | |
| 55 | void (*smp_send_stop)(void); |
| 56 | void (*smp_send_reschedule)(int cpu); |
| 57 | |
| 58 | int (*cpu_up)(unsigned cpu); |
| 59 | int (*cpu_disable)(void); |
| 60 | void (*cpu_die)(unsigned int cpu); |
| 61 | void (*play_dead)(void); |
| 62 | |
| 63 | void (*send_call_func_ipi)(cpumask_t mask); |
| 64 | void (*send_call_func_single_ipi)(int cpu); |
| 65 | }; |
| 66 | |
| 67 | /* Globals due to paravirt */ |
| 68 | extern void set_cpu_sibling_map(int cpu); |
| 69 | |
| 70 | #ifdef CONFIG_SMP |
| 71 | #ifndef CONFIG_PARAVIRT |
| 72 | #define startup_ipi_hook(phys_apicid, start_eip, start_esp) do { } while (0) |
| 73 | #endif |
| 74 | extern struct smp_ops smp_ops; |
| 75 | |
| 76 | static inline void smp_send_stop(void) |
| 77 | { |
| 78 | smp_ops.smp_send_stop(); |
| 79 | } |
| 80 | |
| 81 | static inline void smp_prepare_boot_cpu(void) |
| 82 | { |
| 83 | smp_ops.smp_prepare_boot_cpu(); |
| 84 | } |
| 85 | |
| 86 | static inline void smp_prepare_cpus(unsigned int max_cpus) |
| 87 | { |
| 88 | smp_ops.smp_prepare_cpus(max_cpus); |
| 89 | } |
| 90 | |
| 91 | static inline void smp_cpus_done(unsigned int max_cpus) |
| 92 | { |
| 93 | smp_ops.smp_cpus_done(max_cpus); |
| 94 | } |
| 95 | |
| 96 | static inline int __cpu_up(unsigned int cpu) |
| 97 | { |
| 98 | return smp_ops.cpu_up(cpu); |
| 99 | } |
| 100 | |
| 101 | static inline int __cpu_disable(void) |
| 102 | { |
| 103 | return smp_ops.cpu_disable(); |
| 104 | } |
| 105 | |
| 106 | static inline void __cpu_die(unsigned int cpu) |
| 107 | { |
| 108 | smp_ops.cpu_die(cpu); |
| 109 | } |
| 110 | |
| 111 | static inline void play_dead(void) |
| 112 | { |
| 113 | smp_ops.play_dead(); |
| 114 | } |
| 115 | |
| 116 | static inline void smp_send_reschedule(int cpu) |
| 117 | { |
| 118 | smp_ops.smp_send_reschedule(cpu); |
| 119 | } |
| 120 | |
| 121 | static inline void arch_send_call_function_single_ipi(int cpu) |
| 122 | { |
| 123 | smp_ops.send_call_func_single_ipi(cpu); |
| 124 | } |
| 125 | |
| 126 | static inline void arch_send_call_function_ipi(cpumask_t mask) |
| 127 | { |
| 128 | smp_ops.send_call_func_ipi(mask); |
| 129 | } |
| 130 | |
| 131 | void cpu_disable_common(void); |
| 132 | void native_smp_prepare_boot_cpu(void); |
| 133 | void native_smp_prepare_cpus(unsigned int max_cpus); |
| 134 | void native_smp_cpus_done(unsigned int max_cpus); |
| 135 | int native_cpu_up(unsigned int cpunum); |
| 136 | int native_cpu_disable(void); |
| 137 | void native_cpu_die(unsigned int cpu); |
| 138 | void native_play_dead(void); |
| 139 | void play_dead_common(void); |
| 140 | |
| 141 | void native_send_call_func_ipi(cpumask_t mask); |
| 142 | void native_send_call_func_single_ipi(int cpu); |
| 143 | |
| 144 | void smp_store_cpu_info(int id); |
| 145 | #define cpu_physical_id(cpu) per_cpu(x86_cpu_to_apicid, cpu) |
| 146 | |
| 147 | /* We don't mark CPUs online until __cpu_up(), so we need another measure */ |
| 148 | static inline int num_booting_cpus(void) |
| 149 | { |
| 150 | return cpus_weight(cpu_callout_map); |
| 151 | } |
| 152 | #endif /* CONFIG_SMP */ |
| 153 | |
| 154 | #if defined(CONFIG_SMP) && defined(CONFIG_HOTPLUG_CPU) |
| 155 | extern void prefill_possible_map(void); |
| 156 | #else |
| 157 | static inline void prefill_possible_map(void) |
| 158 | { |
| 159 | } |
| 160 | #endif |
| 161 | |
| 162 | extern unsigned disabled_cpus __cpuinitdata; |
| 163 | |
| 164 | #ifdef CONFIG_X86_32_SMP |
| 165 | /* |
| 166 | * This function is needed by all SMP systems. It must _always_ be valid |
| 167 | * from the initial startup. We map APIC_BASE very early in page_setup(), |
| 168 | * so this is correct in the x86 case. |
| 169 | */ |
| 170 | #define raw_smp_processor_id() (x86_read_percpu(cpu_number)) |
| 171 | extern int safe_smp_processor_id(void); |
| 172 | |
| 173 | #elif defined(CONFIG_X86_64_SMP) |
| 174 | #define raw_smp_processor_id() read_pda(cpunumber) |
| 175 | |
| 176 | #define stack_smp_processor_id() \ |
| 177 | ({ \ |
| 178 | struct thread_info *ti; \ |
| 179 | __asm__("andq %%rsp,%0; ":"=r" (ti) : "0" (CURRENT_MASK)); \ |
| 180 | ti->cpu; \ |
| 181 | }) |
| 182 | #define safe_smp_processor_id() smp_processor_id() |
| 183 | |
| 184 | #else /* !CONFIG_X86_32_SMP && !CONFIG_X86_64_SMP */ |
| 185 | #define cpu_physical_id(cpu) boot_cpu_physical_apicid |
| 186 | #define safe_smp_processor_id() 0 |
| 187 | #define stack_smp_processor_id() 0 |
| 188 | #endif |
| 189 | |
| 190 | #ifdef CONFIG_X86_LOCAL_APIC |
| 191 | |
| 192 | #ifndef CONFIG_X86_64 |
| 193 | static inline int logical_smp_processor_id(void) |
| 194 | { |
| 195 | /* we don't want to mark this access volatile - bad code generation */ |
| 196 | return GET_APIC_LOGICAL_ID(*(u32 *)(APIC_BASE + APIC_LDR)); |
| 197 | } |
| 198 | |
| 199 | #include <mach_apicdef.h> |
| 200 | static inline unsigned int read_apic_id(void) |
| 201 | { |
| 202 | unsigned int reg; |
| 203 | |
| 204 | reg = *(u32 *)(APIC_BASE + APIC_ID); |
| 205 | |
| 206 | return GET_APIC_ID(reg); |
| 207 | } |
| 208 | #endif |
| 209 | |
| 210 | |
| 211 | # if defined(APIC_DEFINITION) || defined(CONFIG_X86_64) |
| 212 | extern int hard_smp_processor_id(void); |
| 213 | # else |
| 214 | #include <mach_apicdef.h> |
| 215 | static inline int hard_smp_processor_id(void) |
| 216 | { |
| 217 | /* we don't want to mark this access volatile - bad code generation */ |
| 218 | return read_apic_id(); |
| 219 | } |
| 220 | # endif /* APIC_DEFINITION */ |
| 221 | |
| 222 | #else /* CONFIG_X86_LOCAL_APIC */ |
| 223 | |
| 224 | # ifndef CONFIG_SMP |
| 225 | # define hard_smp_processor_id() 0 |
| 226 | # endif |
| 227 | |
| 228 | #endif /* CONFIG_X86_LOCAL_APIC */ |
| 229 | |
| 230 | #endif /* __ASSEMBLY__ */ |
| 231 | #endif /* ASM_X86__SMP_H */ |