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 | |
Michael Ellerman | 1426d5a | 2010-01-28 13:23:22 +0000 | [diff] [blame] | 17 | #ifdef CONFIG_PPC64 |
| 18 | |
| 19 | #include <linux/init.h> |
Benjamin Herrenschmidt | dce6670 | 2009-07-23 23:15:42 +0000 | [diff] [blame] | 20 | #include <asm/types.h> |
| 21 | #include <asm/lppaca.h> |
| 22 | #include <asm/mmu.h> |
| 23 | #include <asm/page.h> |
| 24 | #include <asm/exception-64e.h> |
Alexander Graf | 7e57cba | 2010-01-08 02:58:03 +0100 | [diff] [blame] | 25 | #ifdef CONFIG_KVM_BOOK3S_64_HANDLER |
Alexander Graf | 2191d65 | 2010-04-16 00:11:32 +0200 | [diff] [blame] | 26 | #include <asm/kvm_book3s_asm.h> |
Alexander Graf | 7e57cba | 2010-01-08 02:58:03 +0100 | [diff] [blame] | 27 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | |
| 29 | register struct paca_struct *local_paca asm("r13"); |
Hugh Dickins | 048c8bc | 2006-11-01 05:44:54 +1100 | [diff] [blame] | 30 | |
| 31 | #if defined(CONFIG_DEBUG_PREEMPT) && defined(CONFIG_SMP) |
| 32 | extern unsigned int debug_smp_processor_id(void); /* from linux/smp.h */ |
| 33 | /* |
| 34 | * Add standard checks that preemption cannot occur when using get_paca(): |
| 35 | * otherwise the paca_struct it points to may be the wrong one just after. |
| 36 | */ |
| 37 | #define get_paca() ((void) debug_smp_processor_id(), local_paca) |
| 38 | #else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | #define get_paca() local_paca |
Hugh Dickins | 048c8bc | 2006-11-01 05:44:54 +1100 | [diff] [blame] | 40 | #endif |
| 41 | |
David Gibson | 3356bb9f7 | 2006-01-13 10:26:42 +1100 | [diff] [blame] | 42 | #define get_lppaca() (get_paca()->lppaca_ptr) |
Michael Neuling | 2f6093c | 2006-08-07 16:19:19 +1000 | [diff] [blame] | 43 | #define get_slb_shadow() (get_paca()->slb_shadow_ptr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | |
| 45 | struct task_struct; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | |
| 47 | /* |
| 48 | * Defines the layout of the paca. |
| 49 | * |
| 50 | * This structure is not directly accessed by firmware or the service |
Stephen Rothwell | 30ff2e8 | 2008-04-10 16:43:47 +1000 | [diff] [blame] | 51 | * processor. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | */ |
| 53 | struct paca_struct { |
Benjamin Herrenschmidt | 91c60b5 | 2009-06-02 21:17:41 +0000 | [diff] [blame] | 54 | #ifdef CONFIG_PPC_BOOK3S |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | /* |
| 56 | * Because hw_cpu_id, unlike other paca fields, is accessed |
| 57 | * routinely from other CPUs (from the IRQ code), we stick to |
| 58 | * read-only (after boot) fields in the first cacheline to |
| 59 | * avoid cacheline bouncing. |
| 60 | */ |
| 61 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 62 | struct lppaca *lppaca_ptr; /* Pointer to LpPaca for PLIC */ |
Benjamin Herrenschmidt | 91c60b5 | 2009-06-02 21:17:41 +0000 | [diff] [blame] | 63 | #endif /* CONFIG_PPC_BOOK3S */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | /* |
Jon Mason | 2ef9481 | 2006-01-23 10:58:20 -0600 | [diff] [blame] | 65 | * MAGIC: the spinlock functions in arch/powerpc/lib/locks.c |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | * load lock_token and paca_index with a single lwz |
| 67 | * instruction. They must travel together and be properly |
| 68 | * aligned. |
| 69 | */ |
| 70 | u16 lock_token; /* Constant 0x8000, used in locks */ |
| 71 | u16 paca_index; /* Logical processor number */ |
| 72 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | u64 kernel_toc; /* Kernel TOC address */ |
Paul Mackerras | 1f6a93e | 2008-08-30 11:40:24 +1000 | [diff] [blame] | 74 | u64 kernelbase; /* Base address of kernel */ |
| 75 | u64 kernel_msr; /* MSR while running in kernel */ |
Benjamin Herrenschmidt | 91c60b5 | 2009-06-02 21:17:41 +0000 | [diff] [blame] | 76 | #ifdef CONFIG_PPC_STD_MMU_64 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | u64 stab_real; /* Absolute address of segment table */ |
| 78 | u64 stab_addr; /* Virtual address of segment table */ |
Benjamin Herrenschmidt | 91c60b5 | 2009-06-02 21:17:41 +0000 | [diff] [blame] | 79 | #endif /* CONFIG_PPC_STD_MMU_64 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | void *emergency_sp; /* pointer to emergency stack */ |
Anton Blanchard | 7a0268f | 2006-01-11 13:16:44 +1100 | [diff] [blame] | 81 | u64 data_offset; /* per cpu data offset */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 82 | s16 hw_cpu_id; /* Physical processor number */ |
| 83 | u8 cpu_start; /* At startup, processor spins until */ |
| 84 | /* this becomes non-zero. */ |
Michael Neuling | 1fc711f | 2010-05-13 19:40:11 +0000 | [diff] [blame] | 85 | u8 kexec_state; /* set when kexec down has irqs off */ |
Benjamin Herrenschmidt | 91c60b5 | 2009-06-02 21:17:41 +0000 | [diff] [blame] | 86 | #ifdef CONFIG_PPC_STD_MMU_64 |
Stephen Rothwell | e91948f | 2007-03-16 17:47:07 +1100 | [diff] [blame] | 87 | struct slb_shadow *slb_shadow_ptr; |
Paul Mackerras | cf9efce | 2010-08-26 19:56:43 +0000 | [diff] [blame] | 88 | struct dtl_entry *dispatch_log; |
| 89 | struct dtl_entry *dispatch_log_end; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | |
| 91 | /* |
| 92 | * Now, starting in cacheline 2, the exception save areas |
| 93 | */ |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 94 | /* used for most interrupts/exceptions */ |
Paul Mackerras | 48404f2 | 2011-05-01 19:48:20 +0000 | [diff] [blame] | 95 | u64 exgen[11] __attribute__((aligned(0x80))); |
| 96 | u64 exmc[11]; /* used for machine checks */ |
| 97 | u64 exslb[11]; /* used for SLB/segment table misses |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 98 | * on the linear mapping */ |
Benjamin Herrenschmidt | 91c60b5 | 2009-06-02 21:17:41 +0000 | [diff] [blame] | 99 | /* SLB related definitions */ |
Paul Mackerras | bf72aeb | 2006-06-15 10:45:18 +1000 | [diff] [blame] | 100 | u16 vmalloc_sllp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 101 | u16 slb_cache_ptr; |
Benjamin Herrenschmidt | d0f13e3 | 2007-05-08 16:27:27 +1000 | [diff] [blame] | 102 | u16 slb_cache[SLB_CACHE_ENTRIES]; |
Benjamin Herrenschmidt | 91c60b5 | 2009-06-02 21:17:41 +0000 | [diff] [blame] | 103 | #endif /* CONFIG_PPC_STD_MMU_64 */ |
| 104 | |
Benjamin Herrenschmidt | dce6670 | 2009-07-23 23:15:42 +0000 | [diff] [blame] | 105 | #ifdef CONFIG_PPC_BOOK3E |
| 106 | pgd_t *pgd; /* Current PGD */ |
| 107 | pgd_t *kernel_pgd; /* Kernel PGD */ |
| 108 | u64 exgen[8] __attribute__((aligned(0x80))); |
Michael Ellerman | a7b8ad4 | 2011-04-07 21:22:23 +0000 | [diff] [blame] | 109 | /* We can have up to 3 levels of reentrancy in the TLB miss handler */ |
| 110 | u64 extlb[3][EX_TLB_SIZE / sizeof(u64)] __attribute__((aligned(0x80))); |
Benjamin Herrenschmidt | dce6670 | 2009-07-23 23:15:42 +0000 | [diff] [blame] | 111 | u64 exmc[8]; /* used for machine checks */ |
| 112 | u64 excrit[8]; /* used for crit interrupts */ |
| 113 | u64 exdbg[8]; /* used for debug interrupts */ |
| 114 | |
| 115 | /* Kernel stack pointers for use by special exceptions */ |
| 116 | void *mc_kstack; |
| 117 | void *crit_kstack; |
| 118 | void *dbg_kstack; |
| 119 | #endif /* CONFIG_PPC_BOOK3E */ |
| 120 | |
Benjamin Herrenschmidt | 91c60b5 | 2009-06-02 21:17:41 +0000 | [diff] [blame] | 121 | mm_context_t context; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 122 | |
| 123 | /* |
| 124 | * then miscellaneous read-write fields |
| 125 | */ |
| 126 | struct task_struct *__current; /* Pointer to current */ |
| 127 | u64 kstack; /* Saved Kernel stack addr */ |
| 128 | u64 stab_rr; /* stab/slb round-robin counter */ |
Benjamin Herrenschmidt | 948cf67 | 2011-01-24 18:42:41 +1100 | [diff] [blame] | 129 | u64 saved_r1; /* r1 save for RTAS calls or PM */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 130 | u64 saved_msr; /* MSR saved here by enter_rtas */ |
Olof Johansson | 6873040 | 2007-04-24 01:11:55 +1000 | [diff] [blame] | 131 | u16 trap_save; /* Used when bad stack is encountered */ |
Paul Mackerras | d04c56f | 2006-10-04 16:47:49 +1000 | [diff] [blame] | 132 | u8 soft_enabled; /* irq soft-enable flag */ |
| 133 | u8 hard_enabled; /* set if irqs are enabled in MSR */ |
Paul Mackerras | f007cac | 2006-09-13 22:08:26 +1000 | [diff] [blame] | 134 | u8 io_sync; /* writel() needs spin_unlock sync */ |
Peter Zijlstra | e360adb | 2010-10-14 14:01:34 +0800 | [diff] [blame] | 135 | u8 irq_work_pending; /* IRQ_WORK interrupt while soft-disable */ |
Paul Mackerras | c6622f6 | 2006-02-24 10:06:59 +1100 | [diff] [blame] | 136 | |
| 137 | /* Stuff for accurate time accounting */ |
| 138 | u64 user_time; /* accumulated usermode TB ticks */ |
| 139 | u64 system_time; /* accumulated system TB ticks */ |
Paul Mackerras | cf9efce | 2010-08-26 19:56:43 +0000 | [diff] [blame] | 140 | u64 user_time_scaled; /* accumulated usermode SPURR ticks */ |
| 141 | u64 starttime; /* TB value snapshot */ |
| 142 | u64 starttime_user; /* TB value on exit to usermode */ |
Michael Neuling | 4603ac1 | 2007-10-18 03:06:37 -0700 | [diff] [blame] | 143 | u64 startspurr; /* SPURR value snapshot */ |
Paul Mackerras | cf9efce | 2010-08-26 19:56:43 +0000 | [diff] [blame] | 144 | u64 utime_sspurr; /* ->user_time when ->startspurr set */ |
| 145 | u64 stolen_time; /* TB ticks taken by hypervisor */ |
| 146 | u64 dtl_ridx; /* read index in dispatch log */ |
| 147 | struct dtl_entry *dtl_curr; /* pointer corresponding to dtl_ridx */ |
Alexander Graf | 4b7ae55 | 2009-10-30 05:47:22 +0000 | [diff] [blame] | 148 | |
Alexander Graf | c14dea0 | 2010-04-16 00:11:41 +0200 | [diff] [blame] | 149 | #ifdef CONFIG_KVM_BOOK3S_HANDLER |
Alexander Graf | 7e57cba | 2010-01-08 02:58:03 +0100 | [diff] [blame] | 150 | /* We use this to store guest state in */ |
| 151 | struct kvmppc_book3s_shadow_vcpu shadow_vcpu; |
Paul Mackerras | 3c42bf8 | 2011-06-29 00:20:58 +0000 | [diff] [blame^] | 152 | struct kvmppc_host_state kvm_hstate; |
Alexander Graf | 4b7ae55 | 2009-10-30 05:47:22 +0000 | [diff] [blame] | 153 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 154 | }; |
| 155 | |
Michael Ellerman | 1426d5a | 2010-01-28 13:23:22 +0000 | [diff] [blame] | 156 | extern struct paca_struct *paca; |
| 157 | extern __initdata struct paca_struct boot_paca; |
| 158 | extern void initialise_paca(struct paca_struct *new_paca, int cpu); |
Matt Evans | fc53b42 | 2010-07-07 21:55:37 +0000 | [diff] [blame] | 159 | extern void setup_paca(struct paca_struct *new_paca); |
Michael Ellerman | 1426d5a | 2010-01-28 13:23:22 +0000 | [diff] [blame] | 160 | extern void allocate_pacas(void); |
| 161 | extern void free_unused_pacas(void); |
| 162 | |
| 163 | #else /* CONFIG_PPC64 */ |
| 164 | |
| 165 | static inline void allocate_pacas(void) { }; |
| 166 | static inline void free_unused_pacas(void) { }; |
| 167 | |
| 168 | #endif /* CONFIG_PPC64 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 169 | |
Arnd Bergmann | 88ced03 | 2005-12-16 22:43:46 +0100 | [diff] [blame] | 170 | #endif /* __KERNEL__ */ |
David Gibson | 8882a4d | 2005-11-09 13:38:01 +1100 | [diff] [blame] | 171 | #endif /* _ASM_POWERPC_PACA_H */ |