| /* |
| * This control block defines the PACA which defines the processor |
| * specific data for each logical processor on the system. |
| * There are some pointers defined that are utilized by PLIC. |
| * |
| * C 2001 PPC 64 Team, IBM Corp |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License |
| * as published by the Free Software Foundation; either version |
| * 2 of the License, or (at your option) any later version. |
| */ |
| #ifndef _ASM_POWERPC_PACA_H |
| #define _ASM_POWERPC_PACA_H |
| #ifdef __KERNEL__ |
| |
| #ifdef CONFIG_PPC64 |
| |
| #include <linux/init.h> |
| #include <asm/types.h> |
| #include <asm/lppaca.h> |
| #include <asm/mmu.h> |
| #include <asm/page.h> |
| #include <asm/exception-64e.h> |
| #ifdef CONFIG_KVM_BOOK3S_64_HANDLER |
| #include <asm/kvm_book3s_asm.h> |
| #endif |
| |
| register struct paca_struct *local_paca asm("r13"); |
| |
| #if defined(CONFIG_DEBUG_PREEMPT) && defined(CONFIG_SMP) |
| extern unsigned int debug_smp_processor_id(void); /* from linux/smp.h */ |
| /* |
| * Add standard checks that preemption cannot occur when using get_paca(): |
| * otherwise the paca_struct it points to may be the wrong one just after. |
| */ |
| #define get_paca() ((void) debug_smp_processor_id(), local_paca) |
| #else |
| #define get_paca() local_paca |
| #endif |
| |
| #define get_lppaca() (get_paca()->lppaca_ptr) |
| #define get_slb_shadow() (get_paca()->slb_shadow_ptr) |
| |
| struct task_struct; |
| struct opal_machine_check_event; |
| |
| /* |
| * Defines the layout of the paca. |
| * |
| * This structure is not directly accessed by firmware or the service |
| * processor. |
| */ |
| struct paca_struct { |
| #ifdef CONFIG_PPC_BOOK3S |
| /* |
| * Because hw_cpu_id, unlike other paca fields, is accessed |
| * routinely from other CPUs (from the IRQ code), we stick to |
| * read-only (after boot) fields in the first cacheline to |
| * avoid cacheline bouncing. |
| */ |
| |
| struct lppaca *lppaca_ptr; /* Pointer to LpPaca for PLIC */ |
| #endif /* CONFIG_PPC_BOOK3S */ |
| /* |
| * MAGIC: the spinlock functions in arch/powerpc/lib/locks.c |
| * load lock_token and paca_index with a single lwz |
| * instruction. They must travel together and be properly |
| * aligned. |
| */ |
| u16 lock_token; /* Constant 0x8000, used in locks */ |
| u16 paca_index; /* Logical processor number */ |
| |
| u64 kernel_toc; /* Kernel TOC address */ |
| u64 kernelbase; /* Base address of kernel */ |
| u64 kernel_msr; /* MSR while running in kernel */ |
| #ifdef CONFIG_PPC_STD_MMU_64 |
| u64 stab_real; /* Absolute address of segment table */ |
| u64 stab_addr; /* Virtual address of segment table */ |
| #endif /* CONFIG_PPC_STD_MMU_64 */ |
| void *emergency_sp; /* pointer to emergency stack */ |
| u64 data_offset; /* per cpu data offset */ |
| s16 hw_cpu_id; /* Physical processor number */ |
| u8 cpu_start; /* At startup, processor spins until */ |
| /* this becomes non-zero. */ |
| u8 kexec_state; /* set when kexec down has irqs off */ |
| #ifdef CONFIG_PPC_STD_MMU_64 |
| struct slb_shadow *slb_shadow_ptr; |
| struct dtl_entry *dispatch_log; |
| struct dtl_entry *dispatch_log_end; |
| |
| /* |
| * Now, starting in cacheline 2, the exception save areas |
| */ |
| /* used for most interrupts/exceptions */ |
| u64 exgen[11] __attribute__((aligned(0x80))); |
| u64 exmc[11]; /* used for machine checks */ |
| u64 exslb[11]; /* used for SLB/segment table misses |
| * on the linear mapping */ |
| /* SLB related definitions */ |
| u16 vmalloc_sllp; |
| u16 slb_cache_ptr; |
| u16 slb_cache[SLB_CACHE_ENTRIES]; |
| #endif /* CONFIG_PPC_STD_MMU_64 */ |
| |
| #ifdef CONFIG_PPC_BOOK3E |
| u64 exgen[8] __attribute__((aligned(0x80))); |
| /* Keep pgd in the same cacheline as the start of extlb */ |
| pgd_t *pgd __attribute__((aligned(0x80))); /* Current PGD */ |
| pgd_t *kernel_pgd; /* Kernel PGD */ |
| /* We can have up to 3 levels of reentrancy in the TLB miss handler */ |
| u64 extlb[3][EX_TLB_SIZE / sizeof(u64)]; |
| u64 exmc[8]; /* used for machine checks */ |
| u64 excrit[8]; /* used for crit interrupts */ |
| u64 exdbg[8]; /* used for debug interrupts */ |
| |
| /* Kernel stack pointers for use by special exceptions */ |
| void *mc_kstack; |
| void *crit_kstack; |
| void *dbg_kstack; |
| #endif /* CONFIG_PPC_BOOK3E */ |
| |
| mm_context_t context; |
| |
| /* |
| * then miscellaneous read-write fields |
| */ |
| struct task_struct *__current; /* Pointer to current */ |
| u64 kstack; /* Saved Kernel stack addr */ |
| u64 stab_rr; /* stab/slb round-robin counter */ |
| u64 saved_r1; /* r1 save for RTAS calls or PM */ |
| u64 saved_msr; /* MSR saved here by enter_rtas */ |
| u16 trap_save; /* Used when bad stack is encountered */ |
| u8 soft_enabled; /* irq soft-enable flag */ |
| u8 irq_happened; /* irq happened while soft-disabled */ |
| u8 io_sync; /* writel() needs spin_unlock sync */ |
| u8 irq_work_pending; /* IRQ_WORK interrupt while soft-disable */ |
| u8 nap_state_lost; /* NV GPR values lost in power7_idle */ |
| u64 sprg3; /* Saved user-visible sprg */ |
| |
| #ifdef CONFIG_PPC_POWERNV |
| /* Pointer to OPAL machine check event structure set by the |
| * early exception handler for use by high level C handler |
| */ |
| struct opal_machine_check_event *opal_mc_evt; |
| #endif |
| |
| /* Stuff for accurate time accounting */ |
| u64 user_time; /* accumulated usermode TB ticks */ |
| u64 system_time; /* accumulated system TB ticks */ |
| u64 user_time_scaled; /* accumulated usermode SPURR ticks */ |
| u64 starttime; /* TB value snapshot */ |
| u64 starttime_user; /* TB value on exit to usermode */ |
| u64 startspurr; /* SPURR value snapshot */ |
| u64 utime_sspurr; /* ->user_time when ->startspurr set */ |
| u64 stolen_time; /* TB ticks taken by hypervisor */ |
| u64 dtl_ridx; /* read index in dispatch log */ |
| struct dtl_entry *dtl_curr; /* pointer corresponding to dtl_ridx */ |
| |
| #ifdef CONFIG_KVM_BOOK3S_HANDLER |
| #ifdef CONFIG_KVM_BOOK3S_PR |
| /* We use this to store guest state in */ |
| struct kvmppc_book3s_shadow_vcpu shadow_vcpu; |
| #endif |
| struct kvmppc_host_state kvm_hstate; |
| #endif |
| }; |
| |
| extern struct paca_struct *paca; |
| extern __initdata struct paca_struct boot_paca; |
| extern void initialise_paca(struct paca_struct *new_paca, int cpu); |
| extern void setup_paca(struct paca_struct *new_paca); |
| extern void allocate_pacas(void); |
| extern void free_unused_pacas(void); |
| |
| #else /* CONFIG_PPC64 */ |
| |
| static inline void allocate_pacas(void) { }; |
| static inline void free_unused_pacas(void) { }; |
| |
| #endif /* CONFIG_PPC64 */ |
| |
| #endif /* __KERNEL__ */ |
| #endif /* _ASM_POWERPC_PACA_H */ |