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Commit | Line | Data |
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1da177e4 | 1 | /* |
8882a4da DG |
2 | * This control block defines the PACA which defines the processor |
3 | * specific data for each logical processor on the system. | |
1da177e4 LT |
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. | |
8882a4da DG |
12 | */ |
13 | #ifndef _ASM_POWERPC_PACA_H | |
14 | #define _ASM_POWERPC_PACA_H | |
88ced031 | 15 | #ifdef __KERNEL__ |
1da177e4 | 16 | |
1426d5a3 ME |
17 | #ifdef CONFIG_PPC64 |
18 | ||
19 | #include <linux/init.h> | |
dce6670a BH |
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> | |
7e57cba0 | 25 | #ifdef CONFIG_KVM_BOOK3S_64_HANDLER |
2191d657 | 26 | #include <asm/kvm_book3s_asm.h> |
7e57cba0 | 27 | #endif |
1da177e4 LT |
28 | |
29 | register struct paca_struct *local_paca asm("r13"); | |
048c8bc9 HD |
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 | |
1da177e4 | 39 | #define get_paca() local_paca |
048c8bc9 HD |
40 | #endif |
41 | ||
3356bb9f | 42 | #define get_lppaca() (get_paca()->lppaca_ptr) |
2f6093c8 | 43 | #define get_slb_shadow() (get_paca()->slb_shadow_ptr) |
1da177e4 LT |
44 | |
45 | struct task_struct; | |
1da177e4 LT |
46 | |
47 | /* | |
48 | * Defines the layout of the paca. | |
49 | * | |
50 | * This structure is not directly accessed by firmware or the service | |
30ff2e87 | 51 | * processor. |
1da177e4 LT |
52 | */ |
53 | struct paca_struct { | |
91c60b5b | 54 | #ifdef CONFIG_PPC_BOOK3S |
1da177e4 LT |
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 | ||
1da177e4 | 62 | struct lppaca *lppaca_ptr; /* Pointer to LpPaca for PLIC */ |
91c60b5b | 63 | #endif /* CONFIG_PPC_BOOK3S */ |
1da177e4 | 64 | /* |
2ef9481e | 65 | * MAGIC: the spinlock functions in arch/powerpc/lib/locks.c |
1da177e4 LT |
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 | ||
1da177e4 | 73 | u64 kernel_toc; /* Kernel TOC address */ |
1f6a93e4 PM |
74 | u64 kernelbase; /* Base address of kernel */ |
75 | u64 kernel_msr; /* MSR while running in kernel */ | |
91c60b5b | 76 | #ifdef CONFIG_PPC_STD_MMU_64 |
1da177e4 LT |
77 | u64 stab_real; /* Absolute address of segment table */ |
78 | u64 stab_addr; /* Virtual address of segment table */ | |
91c60b5b | 79 | #endif /* CONFIG_PPC_STD_MMU_64 */ |
1da177e4 | 80 | void *emergency_sp; /* pointer to emergency stack */ |
7a0268fa | 81 | u64 data_offset; /* per cpu data offset */ |
1da177e4 LT |
82 | s16 hw_cpu_id; /* Physical processor number */ |
83 | u8 cpu_start; /* At startup, processor spins until */ | |
84 | /* this becomes non-zero. */ | |
1fc711f7 | 85 | u8 kexec_state; /* set when kexec down has irqs off */ |
91c60b5b | 86 | #ifdef CONFIG_PPC_STD_MMU_64 |
e91948fd | 87 | struct slb_shadow *slb_shadow_ptr; |
1da177e4 LT |
88 | |
89 | /* | |
90 | * Now, starting in cacheline 2, the exception save areas | |
91 | */ | |
3c726f8d BH |
92 | /* used for most interrupts/exceptions */ |
93 | u64 exgen[10] __attribute__((aligned(0x80))); | |
94 | u64 exmc[10]; /* used for machine checks */ | |
95 | u64 exslb[10]; /* used for SLB/segment table misses | |
96 | * on the linear mapping */ | |
91c60b5b | 97 | /* SLB related definitions */ |
bf72aeba | 98 | u16 vmalloc_sllp; |
1da177e4 | 99 | u16 slb_cache_ptr; |
d0f13e3c | 100 | u16 slb_cache[SLB_CACHE_ENTRIES]; |
91c60b5b BH |
101 | #endif /* CONFIG_PPC_STD_MMU_64 */ |
102 | ||
dce6670a BH |
103 | #ifdef CONFIG_PPC_BOOK3E |
104 | pgd_t *pgd; /* Current PGD */ | |
105 | pgd_t *kernel_pgd; /* Kernel PGD */ | |
106 | u64 exgen[8] __attribute__((aligned(0x80))); | |
107 | u64 extlb[EX_TLB_SIZE*3] __attribute__((aligned(0x80))); | |
108 | u64 exmc[8]; /* used for machine checks */ | |
109 | u64 excrit[8]; /* used for crit interrupts */ | |
110 | u64 exdbg[8]; /* used for debug interrupts */ | |
111 | ||
112 | /* Kernel stack pointers for use by special exceptions */ | |
113 | void *mc_kstack; | |
114 | void *crit_kstack; | |
115 | void *dbg_kstack; | |
116 | #endif /* CONFIG_PPC_BOOK3E */ | |
117 | ||
91c60b5b | 118 | mm_context_t context; |
1da177e4 LT |
119 | |
120 | /* | |
121 | * then miscellaneous read-write fields | |
122 | */ | |
123 | struct task_struct *__current; /* Pointer to current */ | |
124 | u64 kstack; /* Saved Kernel stack addr */ | |
125 | u64 stab_rr; /* stab/slb round-robin counter */ | |
1da177e4 LT |
126 | u64 saved_r1; /* r1 save for RTAS calls */ |
127 | u64 saved_msr; /* MSR saved here by enter_rtas */ | |
68730401 | 128 | u16 trap_save; /* Used when bad stack is encountered */ |
d04c56f7 PM |
129 | u8 soft_enabled; /* irq soft-enable flag */ |
130 | u8 hard_enabled; /* set if irqs are enabled in MSR */ | |
f007cacf | 131 | u8 io_sync; /* writel() needs spin_unlock sync */ |
e360adbe | 132 | u8 irq_work_pending; /* IRQ_WORK interrupt while soft-disable */ |
c6622f63 PM |
133 | |
134 | /* Stuff for accurate time accounting */ | |
135 | u64 user_time; /* accumulated usermode TB ticks */ | |
136 | u64 system_time; /* accumulated system TB ticks */ | |
137 | u64 startpurr; /* PURR/TB value snapshot */ | |
4603ac18 | 138 | u64 startspurr; /* SPURR value snapshot */ |
4b7ae55d | 139 | |
c14dea04 | 140 | #ifdef CONFIG_KVM_BOOK3S_HANDLER |
7e57cba0 AG |
141 | /* We use this to store guest state in */ |
142 | struct kvmppc_book3s_shadow_vcpu shadow_vcpu; | |
4b7ae55d | 143 | #endif |
1da177e4 LT |
144 | }; |
145 | ||
1426d5a3 ME |
146 | extern struct paca_struct *paca; |
147 | extern __initdata struct paca_struct boot_paca; | |
148 | extern void initialise_paca(struct paca_struct *new_paca, int cpu); | |
fc53b420 | 149 | extern void setup_paca(struct paca_struct *new_paca); |
1426d5a3 ME |
150 | extern void allocate_pacas(void); |
151 | extern void free_unused_pacas(void); | |
152 | ||
153 | #else /* CONFIG_PPC64 */ | |
154 | ||
155 | static inline void allocate_pacas(void) { }; | |
156 | static inline void free_unused_pacas(void) { }; | |
157 | ||
158 | #endif /* CONFIG_PPC64 */ | |
1da177e4 | 159 | |
88ced031 | 160 | #endif /* __KERNEL__ */ |
8882a4da | 161 | #endif /* _ASM_POWERPC_PACA_H */ |