1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
120 lines
3.9 KiB
C
120 lines
3.9 KiB
C
#ifndef _PPC64_PACA_H
|
|
#define _PPC64_PACA_H
|
|
|
|
/*
|
|
* include/asm-ppc64/paca.h
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#include <linux/config.h>
|
|
#include <asm/types.h>
|
|
#include <asm/lppaca.h>
|
|
#include <asm/iSeries/ItLpRegSave.h>
|
|
#include <asm/mmu.h>
|
|
|
|
register struct paca_struct *local_paca asm("r13");
|
|
#define get_paca() local_paca
|
|
|
|
struct task_struct;
|
|
struct ItLpQueue;
|
|
|
|
/*
|
|
* Defines the layout of the paca.
|
|
*
|
|
* This structure is not directly accessed by firmware or the service
|
|
* processor except for the first two pointers that point to the
|
|
* lppaca area and the ItLpRegSave area for this CPU. Both the
|
|
* lppaca and ItLpRegSave objects are currently contained within the
|
|
* PACA but they do not need to be.
|
|
*/
|
|
struct paca_struct {
|
|
/*
|
|
* 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.
|
|
*/
|
|
|
|
/*
|
|
* MAGIC: These first two pointers can't be moved - they're
|
|
* accessed by the firmware
|
|
*/
|
|
struct lppaca *lppaca_ptr; /* Pointer to LpPaca for PLIC */
|
|
struct ItLpRegSave *reg_save_ptr; /* Pointer to LpRegSave for PLIC */
|
|
|
|
/*
|
|
* MAGIC: the spinlock functions in arch/ppc64/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 */
|
|
|
|
u32 default_decr; /* Default decrementer value */
|
|
struct ItLpQueue *lpqueue_ptr; /* LpQueue handled by this CPU */
|
|
u64 kernel_toc; /* Kernel TOC address */
|
|
u64 stab_real; /* Absolute address of segment table */
|
|
u64 stab_addr; /* Virtual address of segment table */
|
|
void *emergency_sp; /* pointer to emergency stack */
|
|
s16 hw_cpu_id; /* Physical processor number */
|
|
u8 cpu_start; /* At startup, processor spins until */
|
|
/* this becomes non-zero. */
|
|
|
|
/*
|
|
* Now, starting in cacheline 2, the exception save areas
|
|
*/
|
|
u64 exgen[8] __attribute__((aligned(0x80))); /* used for most interrupts/exceptions */
|
|
u64 exmc[8]; /* used for machine checks */
|
|
u64 exslb[8]; /* used for SLB/segment table misses
|
|
* on the linear mapping */
|
|
mm_context_t context;
|
|
u16 slb_cache[SLB_CACHE_ENTRIES];
|
|
u16 slb_cache_ptr;
|
|
|
|
/*
|
|
* 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 next_jiffy_update_tb; /* TB value for next jiffy update */
|
|
u64 saved_r1; /* r1 save for RTAS calls */
|
|
u64 saved_msr; /* MSR saved here by enter_rtas */
|
|
u32 lpevent_count; /* lpevents processed */
|
|
u8 proc_enabled; /* irq soft-enable flag */
|
|
|
|
/* not yet used */
|
|
u64 exdsi[8]; /* used for linear mapping hash table misses */
|
|
|
|
/*
|
|
* iSeries structure which the hypervisor knows about -
|
|
* this structure should not cross a page boundary.
|
|
* The vpa_init/register_vpa call is now known to fail if the
|
|
* lppaca structure crosses a page boundary.
|
|
* The lppaca is also used on POWER5 pSeries boxes.
|
|
* The lppaca is 640 bytes long, and cannot readily change
|
|
* since the hypervisor knows its layout, so a 1kB
|
|
* alignment will suffice to ensure that it doesn't
|
|
* cross a page boundary.
|
|
*/
|
|
struct lppaca lppaca __attribute__((__aligned__(0x400)));
|
|
#ifdef CONFIG_PPC_ISERIES
|
|
struct ItLpRegSave reg_save;
|
|
#endif
|
|
};
|
|
|
|
extern struct paca_struct paca[];
|
|
|
|
#endif /* _PPC64_PACA_H */
|