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 | * include/asm-powerpc/paca.h |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3 | * |
David Gibson | 8882a4d | 2005-11-09 13:38:01 +1100 | [diff] [blame] | 4 | * This control block defines the PACA which defines the processor |
| 5 | * specific data for each logical processor on the system. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6 | * There are some pointers defined that are utilized by PLIC. |
| 7 | * |
| 8 | * C 2001 PPC 64 Team, IBM Corp |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or |
| 11 | * modify it under the terms of the GNU General Public License |
| 12 | * as published by the Free Software Foundation; either version |
| 13 | * 2 of the License, or (at your option) any later version. |
David Gibson | 8882a4d | 2005-11-09 13:38:01 +1100 | [diff] [blame] | 14 | */ |
| 15 | #ifndef _ASM_POWERPC_PACA_H |
| 16 | #define _ASM_POWERPC_PACA_H |
Arnd Bergmann | 88ced03 | 2005-12-16 22:43:46 +0100 | [diff] [blame] | 17 | #ifdef __KERNEL__ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | |
| 19 | #include <linux/config.h> |
| 20 | #include <asm/types.h> |
| 21 | #include <asm/lppaca.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | #include <asm/mmu.h> |
| 23 | |
| 24 | register struct paca_struct *local_paca asm("r13"); |
| 25 | #define get_paca() local_paca |
David Gibson | 3356bb9f7 | 2006-01-13 10:26:42 +1100 | [diff] [blame] | 26 | #define get_lppaca() (get_paca()->lppaca_ptr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | |
| 28 | struct task_struct; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | |
| 30 | /* |
| 31 | * Defines the layout of the paca. |
| 32 | * |
| 33 | * This structure is not directly accessed by firmware or the service |
| 34 | * processor except for the first two pointers that point to the |
David Gibson | 1888e7b | 2005-11-24 16:34:45 +1100 | [diff] [blame] | 35 | * lppaca area and the ItLpRegSave area for this CPU. The lppaca |
| 36 | * object is currently contained within the PACA but it doesn't need |
| 37 | * to be. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | */ |
| 39 | struct paca_struct { |
| 40 | /* |
| 41 | * Because hw_cpu_id, unlike other paca fields, is accessed |
| 42 | * routinely from other CPUs (from the IRQ code), we stick to |
| 43 | * read-only (after boot) fields in the first cacheline to |
| 44 | * avoid cacheline bouncing. |
| 45 | */ |
| 46 | |
| 47 | /* |
| 48 | * MAGIC: These first two pointers can't be moved - they're |
| 49 | * accessed by the firmware |
| 50 | */ |
| 51 | struct lppaca *lppaca_ptr; /* Pointer to LpPaca for PLIC */ |
David Gibson | 1888e7b | 2005-11-24 16:34:45 +1100 | [diff] [blame] | 52 | #ifdef CONFIG_PPC_ISERIES |
| 53 | void *reg_save_ptr; /* Pointer to LpRegSave for PLIC */ |
| 54 | #endif /* CONFIG_PPC_ISERIES */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | |
| 56 | /* |
Jon Mason | 2ef9481 | 2006-01-23 10:58:20 -0600 | [diff] [blame] | 57 | * MAGIC: the spinlock functions in arch/powerpc/lib/locks.c |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 58 | * load lock_token and paca_index with a single lwz |
| 59 | * instruction. They must travel together and be properly |
| 60 | * aligned. |
| 61 | */ |
| 62 | u16 lock_token; /* Constant 0x8000, used in locks */ |
| 63 | u16 paca_index; /* Logical processor number */ |
| 64 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | u64 kernel_toc; /* Kernel TOC address */ |
| 66 | u64 stab_real; /* Absolute address of segment table */ |
| 67 | u64 stab_addr; /* Virtual address of segment table */ |
| 68 | void *emergency_sp; /* pointer to emergency stack */ |
Anton Blanchard | 7a0268f | 2006-01-11 13:16:44 +1100 | [diff] [blame] | 69 | u64 data_offset; /* per cpu data offset */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 70 | s16 hw_cpu_id; /* Physical processor number */ |
| 71 | u8 cpu_start; /* At startup, processor spins until */ |
| 72 | /* this becomes non-zero. */ |
| 73 | |
| 74 | /* |
| 75 | * Now, starting in cacheline 2, the exception save areas |
| 76 | */ |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 77 | /* used for most interrupts/exceptions */ |
| 78 | u64 exgen[10] __attribute__((aligned(0x80))); |
| 79 | u64 exmc[10]; /* used for machine checks */ |
| 80 | u64 exslb[10]; /* used for SLB/segment table misses |
| 81 | * on the linear mapping */ |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 82 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | mm_context_t context; |
Paul Mackerras | bf72aeb | 2006-06-15 10:45:18 +1000 | [diff] [blame^] | 84 | u16 vmalloc_sllp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 85 | u16 slb_cache[SLB_CACHE_ENTRIES]; |
| 86 | u16 slb_cache_ptr; |
| 87 | |
| 88 | /* |
| 89 | * then miscellaneous read-write fields |
| 90 | */ |
| 91 | struct task_struct *__current; /* Pointer to current */ |
| 92 | u64 kstack; /* Saved Kernel stack addr */ |
| 93 | u64 stab_rr; /* stab/slb round-robin counter */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 94 | u64 saved_r1; /* r1 save for RTAS calls */ |
| 95 | u64 saved_msr; /* MSR saved here by enter_rtas */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | u8 proc_enabled; /* irq soft-enable flag */ |
Paul Mackerras | c6622f6 | 2006-02-24 10:06:59 +1100 | [diff] [blame] | 97 | |
| 98 | /* Stuff for accurate time accounting */ |
| 99 | u64 user_time; /* accumulated usermode TB ticks */ |
| 100 | u64 system_time; /* accumulated system TB ticks */ |
| 101 | u64 startpurr; /* PURR/TB value snapshot */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 102 | }; |
| 103 | |
| 104 | extern struct paca_struct paca[]; |
| 105 | |
Anton Blanchard | 4df2046 | 2006-03-25 17:25:17 +1100 | [diff] [blame] | 106 | void setup_boot_paca(void); |
| 107 | |
Arnd Bergmann | 88ced03 | 2005-12-16 22:43:46 +0100 | [diff] [blame] | 108 | #endif /* __KERNEL__ */ |
David Gibson | 8882a4d | 2005-11-09 13:38:01 +1100 | [diff] [blame] | 109 | #endif /* _ASM_POWERPC_PACA_H */ |