209 lines
6.7 KiB
C
209 lines
6.7 KiB
C
/*
|
|
* 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 <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.
|
|
*/
|
|
#ifdef __BIG_ENDIAN__
|
|
u16 lock_token; /* Constant 0x8000, used in locks */
|
|
u16 paca_index; /* Logical processor number */
|
|
#else
|
|
u16 paca_index; /* Logical processor number */
|
|
u16 lock_token; /* Constant 0x8000, used in locks */
|
|
#endif
|
|
|
|
u64 kernel_toc; /* Kernel TOC address */
|
|
u64 kernelbase; /* Base address of kernel */
|
|
u64 kernel_msr; /* MSR while running in kernel */
|
|
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;
|
|
#endif /* CONFIG_PPC_STD_MMU_64 */
|
|
u64 dscr_default; /* per-CPU default DSCR */
|
|
|
|
#ifdef CONFIG_PPC_STD_MMU_64
|
|
/*
|
|
* Now, starting in cacheline 2, the exception save areas
|
|
*/
|
|
/* used for most interrupts/exceptions */
|
|
u64 exgen[13] __attribute__((aligned(0x80)));
|
|
u64 exmc[13]; /* used for machine checks */
|
|
u64 exslb[13]; /* used for SLB/segment table misses
|
|
* on the linear mapping */
|
|
/* SLB related definitions */
|
|
u16 vmalloc_sllp;
|
|
u16 slb_cache_ptr;
|
|
u32 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 */
|
|
|
|
/* Shared by all threads of a core -- points to tcd of first thread */
|
|
struct tlb_core_data *tcd_ptr;
|
|
|
|
/*
|
|
* We can have up to 3 levels of reentrancy in the TLB miss handler,
|
|
* in each of four exception levels (normal, crit, mcheck, debug).
|
|
*/
|
|
u64 extlb[12][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;
|
|
|
|
struct tlb_core_data tcd;
|
|
#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 sprg_vdso; /* Saved user-visible sprg */
|
|
#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
|
|
u64 tm_scratch; /* TM scratch area for reclaim */
|
|
#endif
|
|
|
|
#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
|
|
#ifdef CONFIG_PPC_BOOK3S_64
|
|
/* Exclusive emergency stack pointer for machine check exception. */
|
|
void *mc_emergency_sp;
|
|
/*
|
|
* Flag to check whether we are in machine check early handler
|
|
* and already using emergency stack.
|
|
*/
|
|
u16 in_mce;
|
|
u8 hmi_event_available; /* HMI event is available */
|
|
#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_POSSIBLE
|
|
/* 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 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 */
|