Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
David Gibson | 8882a4d | 2005-11-09 13:38:01 +1100 | [diff] [blame] | 2 | * This control block defines the PACA which defines the processor |
| 3 | * specific data for each logical processor on the system. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4 | * There are some pointers defined that are utilized by PLIC. |
| 5 | * |
| 6 | * C 2001 PPC 64 Team, IBM Corp |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or |
| 9 | * modify it under the terms of the GNU General Public License |
| 10 | * as published by the Free Software Foundation; either version |
| 11 | * 2 of the License, or (at your option) any later version. |
David Gibson | 8882a4d | 2005-11-09 13:38:01 +1100 | [diff] [blame] | 12 | */ |
| 13 | #ifndef _ASM_POWERPC_PACA_H |
| 14 | #define _ASM_POWERPC_PACA_H |
Arnd Bergmann | 88ced03 | 2005-12-16 22:43:46 +0100 | [diff] [blame] | 15 | #ifdef __KERNEL__ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 16 | |
Benjamin Herrenschmidt | dce6670 | 2009-07-23 23:15:42 +0000 | [diff] [blame] | 17 | #include <asm/types.h> |
| 18 | #include <asm/lppaca.h> |
| 19 | #include <asm/mmu.h> |
| 20 | #include <asm/page.h> |
| 21 | #include <asm/exception-64e.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | |
| 23 | register struct paca_struct *local_paca asm("r13"); |
Hugh Dickins | 048c8bc | 2006-11-01 05:44:54 +1100 | [diff] [blame] | 24 | |
| 25 | #if defined(CONFIG_DEBUG_PREEMPT) && defined(CONFIG_SMP) |
| 26 | extern unsigned int debug_smp_processor_id(void); /* from linux/smp.h */ |
| 27 | /* |
| 28 | * Add standard checks that preemption cannot occur when using get_paca(): |
| 29 | * otherwise the paca_struct it points to may be the wrong one just after. |
| 30 | */ |
| 31 | #define get_paca() ((void) debug_smp_processor_id(), local_paca) |
| 32 | #else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | #define get_paca() local_paca |
Hugh Dickins | 048c8bc | 2006-11-01 05:44:54 +1100 | [diff] [blame] | 34 | #endif |
| 35 | |
David Gibson | 3356bb9f7 | 2006-01-13 10:26:42 +1100 | [diff] [blame] | 36 | #define get_lppaca() (get_paca()->lppaca_ptr) |
Michael Neuling | 2f6093c | 2006-08-07 16:19:19 +1000 | [diff] [blame] | 37 | #define get_slb_shadow() (get_paca()->slb_shadow_ptr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | |
| 39 | struct task_struct; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | |
| 41 | /* |
| 42 | * Defines the layout of the paca. |
| 43 | * |
| 44 | * This structure is not directly accessed by firmware or the service |
Stephen Rothwell | 30ff2e8 | 2008-04-10 16:43:47 +1000 | [diff] [blame] | 45 | * processor. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | */ |
| 47 | struct paca_struct { |
Benjamin Herrenschmidt | 91c60b5 | 2009-06-02 21:17:41 +0000 | [diff] [blame] | 48 | #ifdef CONFIG_PPC_BOOK3S |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | /* |
| 50 | * Because hw_cpu_id, unlike other paca fields, is accessed |
| 51 | * routinely from other CPUs (from the IRQ code), we stick to |
| 52 | * read-only (after boot) fields in the first cacheline to |
| 53 | * avoid cacheline bouncing. |
| 54 | */ |
| 55 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | struct lppaca *lppaca_ptr; /* Pointer to LpPaca for PLIC */ |
Benjamin Herrenschmidt | 91c60b5 | 2009-06-02 21:17:41 +0000 | [diff] [blame] | 57 | #endif /* CONFIG_PPC_BOOK3S */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 58 | /* |
Jon Mason | 2ef9481 | 2006-01-23 10:58:20 -0600 | [diff] [blame] | 59 | * MAGIC: the spinlock functions in arch/powerpc/lib/locks.c |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | * load lock_token and paca_index with a single lwz |
| 61 | * instruction. They must travel together and be properly |
| 62 | * aligned. |
| 63 | */ |
| 64 | u16 lock_token; /* Constant 0x8000, used in locks */ |
| 65 | u16 paca_index; /* Logical processor number */ |
| 66 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | u64 kernel_toc; /* Kernel TOC address */ |
Paul Mackerras | 1f6a93e | 2008-08-30 11:40:24 +1000 | [diff] [blame] | 68 | u64 kernelbase; /* Base address of kernel */ |
| 69 | u64 kernel_msr; /* MSR while running in kernel */ |
Benjamin Herrenschmidt | 91c60b5 | 2009-06-02 21:17:41 +0000 | [diff] [blame] | 70 | #ifdef CONFIG_PPC_STD_MMU_64 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 71 | u64 stab_real; /* Absolute address of segment table */ |
| 72 | u64 stab_addr; /* Virtual address of segment table */ |
Benjamin Herrenschmidt | 91c60b5 | 2009-06-02 21:17:41 +0000 | [diff] [blame] | 73 | #endif /* CONFIG_PPC_STD_MMU_64 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 74 | void *emergency_sp; /* pointer to emergency stack */ |
Anton Blanchard | 7a0268f | 2006-01-11 13:16:44 +1100 | [diff] [blame] | 75 | u64 data_offset; /* per cpu data offset */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | s16 hw_cpu_id; /* Physical processor number */ |
| 77 | u8 cpu_start; /* At startup, processor spins until */ |
| 78 | /* this becomes non-zero. */ |
Benjamin Herrenschmidt | 91c60b5 | 2009-06-02 21:17:41 +0000 | [diff] [blame] | 79 | #ifdef CONFIG_PPC_STD_MMU_64 |
Stephen Rothwell | e91948f | 2007-03-16 17:47:07 +1100 | [diff] [blame] | 80 | struct slb_shadow *slb_shadow_ptr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 81 | |
| 82 | /* |
| 83 | * Now, starting in cacheline 2, the exception save areas |
| 84 | */ |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 85 | /* used for most interrupts/exceptions */ |
| 86 | u64 exgen[10] __attribute__((aligned(0x80))); |
| 87 | u64 exmc[10]; /* used for machine checks */ |
| 88 | u64 exslb[10]; /* used for SLB/segment table misses |
| 89 | * on the linear mapping */ |
Benjamin Herrenschmidt | 91c60b5 | 2009-06-02 21:17:41 +0000 | [diff] [blame] | 90 | /* SLB related definitions */ |
Paul Mackerras | bf72aeb | 2006-06-15 10:45:18 +1000 | [diff] [blame] | 91 | u16 vmalloc_sllp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | u16 slb_cache_ptr; |
Benjamin Herrenschmidt | d0f13e3 | 2007-05-08 16:27:27 +1000 | [diff] [blame] | 93 | u16 slb_cache[SLB_CACHE_ENTRIES]; |
Benjamin Herrenschmidt | 91c60b5 | 2009-06-02 21:17:41 +0000 | [diff] [blame] | 94 | #endif /* CONFIG_PPC_STD_MMU_64 */ |
| 95 | |
Benjamin Herrenschmidt | dce6670 | 2009-07-23 23:15:42 +0000 | [diff] [blame] | 96 | #ifdef CONFIG_PPC_BOOK3E |
| 97 | pgd_t *pgd; /* Current PGD */ |
| 98 | pgd_t *kernel_pgd; /* Kernel PGD */ |
| 99 | u64 exgen[8] __attribute__((aligned(0x80))); |
| 100 | u64 extlb[EX_TLB_SIZE*3] __attribute__((aligned(0x80))); |
| 101 | u64 exmc[8]; /* used for machine checks */ |
| 102 | u64 excrit[8]; /* used for crit interrupts */ |
| 103 | u64 exdbg[8]; /* used for debug interrupts */ |
| 104 | |
| 105 | /* Kernel stack pointers for use by special exceptions */ |
| 106 | void *mc_kstack; |
| 107 | void *crit_kstack; |
| 108 | void *dbg_kstack; |
| 109 | #endif /* CONFIG_PPC_BOOK3E */ |
| 110 | |
Benjamin Herrenschmidt | 91c60b5 | 2009-06-02 21:17:41 +0000 | [diff] [blame] | 111 | mm_context_t context; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 112 | |
| 113 | /* |
| 114 | * then miscellaneous read-write fields |
| 115 | */ |
| 116 | struct task_struct *__current; /* Pointer to current */ |
| 117 | u64 kstack; /* Saved Kernel stack addr */ |
| 118 | u64 stab_rr; /* stab/slb round-robin counter */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 119 | u64 saved_r1; /* r1 save for RTAS calls */ |
| 120 | u64 saved_msr; /* MSR saved here by enter_rtas */ |
Olof Johansson | 6873040 | 2007-04-24 01:11:55 +1000 | [diff] [blame] | 121 | u16 trap_save; /* Used when bad stack is encountered */ |
Paul Mackerras | d04c56f | 2006-10-04 16:47:49 +1000 | [diff] [blame] | 122 | u8 soft_enabled; /* irq soft-enable flag */ |
| 123 | u8 hard_enabled; /* set if irqs are enabled in MSR */ |
Paul Mackerras | f007cac | 2006-09-13 22:08:26 +1000 | [diff] [blame] | 124 | u8 io_sync; /* writel() needs spin_unlock sync */ |
Paul Mackerras | 93a6d3c | 2009-01-09 16:52:19 +1100 | [diff] [blame] | 125 | u8 perf_counter_pending; /* PM interrupt while soft-disabled */ |
Paul Mackerras | c6622f6 | 2006-02-24 10:06:59 +1100 | [diff] [blame] | 126 | |
| 127 | /* Stuff for accurate time accounting */ |
| 128 | u64 user_time; /* accumulated usermode TB ticks */ |
| 129 | u64 system_time; /* accumulated system TB ticks */ |
| 130 | u64 startpurr; /* PURR/TB value snapshot */ |
Michael Neuling | 4603ac1 | 2007-10-18 03:06:37 -0700 | [diff] [blame] | 131 | u64 startspurr; /* SPURR value snapshot */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 132 | }; |
| 133 | |
| 134 | extern struct paca_struct paca[]; |
Tony Breeds | 90035fe | 2008-04-24 13:43:49 +1000 | [diff] [blame] | 135 | extern void initialise_pacas(void); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | |
Arnd Bergmann | 88ced03 | 2005-12-16 22:43:46 +0100 | [diff] [blame] | 137 | #endif /* __KERNEL__ */ |
David Gibson | 8882a4d | 2005-11-09 13:38:01 +1100 | [diff] [blame] | 138 | #endif /* _ASM_POWERPC_PACA_H */ |