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1 | /* | |
2 | * lppaca.h | |
3 | * Copyright (C) 2001 Mike Corrigan IBM Corporation | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License as published by | |
7 | * the Free Software Foundation; either version 2 of the License, or | |
8 | * (at your option) any later version. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License | |
16 | * along with this program; if not, write to the Free Software | |
17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
18 | */ | |
19 | #ifndef _ASM_POWERPC_LPPACA_H | |
20 | #define _ASM_POWERPC_LPPACA_H | |
21 | #ifdef __KERNEL__ | |
22 | ||
23 | /* These definitions relate to hypervisors that only exist when using | |
24 | * a server type processor | |
25 | */ | |
26 | #ifdef CONFIG_PPC_BOOK3S | |
27 | ||
28 | //============================================================================= | |
29 | // | |
30 | // This control block contains the data that is shared between the | |
31 | // hypervisor (PLIC) and the OS. | |
32 | // | |
33 | // | |
34 | //---------------------------------------------------------------------------- | |
35 | #include <linux/cache.h> | |
36 | #include <linux/threads.h> | |
37 | #include <asm/types.h> | |
38 | #include <asm/mmu.h> | |
39 | ||
40 | /* | |
41 | * We only have to have statically allocated lppaca structs on | |
42 | * legacy iSeries, which supports at most 64 cpus. | |
43 | */ | |
44 | #ifdef CONFIG_PPC_ISERIES | |
45 | #if NR_CPUS < 64 | |
46 | #define NR_LPPACAS NR_CPUS | |
47 | #else | |
48 | #define NR_LPPACAS 64 | |
49 | #endif | |
50 | #else /* not iSeries */ | |
51 | #define NR_LPPACAS 1 | |
52 | #endif | |
53 | ||
54 | ||
55 | /* The Hypervisor barfs if the lppaca crosses a page boundary. A 1k | |
56 | * alignment is sufficient to prevent this */ | |
57 | struct lppaca { | |
58 | //============================================================================= | |
59 | // CACHE_LINE_1 0x0000 - 0x007F Contains read-only data | |
60 | // NOTE: The xDynXyz fields are fields that will be dynamically changed by | |
61 | // PLIC when preparing to bring a processor online or when dispatching a | |
62 | // virtual processor! | |
63 | //============================================================================= | |
64 | u32 desc; // Eye catcher 0xD397D781 x00-x03 | |
65 | u16 size; // Size of this struct x04-x05 | |
66 | u16 reserved1; // Reserved x06-x07 | |
67 | u16 reserved2:14; // Reserved x08-x09 | |
68 | u8 shared_proc:1; // Shared processor indicator ... | |
69 | u8 secondary_thread:1; // Secondary thread indicator ... | |
70 | volatile u8 dyn_proc_status:8; // Dynamic Status of this proc x0A-x0A | |
71 | u8 secondary_thread_count; // Secondary thread count x0B-x0B | |
72 | volatile u16 dyn_hv_phys_proc_index;// Dynamic HV Physical Proc Index0C-x0D | |
73 | volatile u16 dyn_hv_log_proc_index;// Dynamic HV Logical Proc Indexx0E-x0F | |
74 | u32 decr_val; // Value for Decr programming x10-x13 | |
75 | u32 pmc_val; // Value for PMC regs x14-x17 | |
76 | volatile u32 dyn_hw_node_id; // Dynamic Hardware Node id x18-x1B | |
77 | volatile u32 dyn_hw_proc_id; // Dynamic Hardware Proc Id x1C-x1F | |
78 | volatile u32 dyn_pir; // Dynamic ProcIdReg value x20-x23 | |
79 | u32 dsei_data; // DSEI data x24-x27 | |
80 | u64 sprg3; // SPRG3 value x28-x2F | |
81 | u8 reserved3[40]; // Reserved x30-x57 | |
82 | volatile u8 vphn_assoc_counts[8]; // Virtual processor home node | |
83 | // associativity change counters x58-x5F | |
84 | u8 reserved4[32]; // Reserved x60-x7F | |
85 | ||
86 | //============================================================================= | |
87 | // CACHE_LINE_2 0x0080 - 0x00FF Contains local read-write data | |
88 | //============================================================================= | |
89 | // This Dword contains a byte for each type of interrupt that can occur. | |
90 | // The IPI is a count while the others are just a binary 1 or 0. | |
91 | union { | |
92 | u64 any_int; | |
93 | struct { | |
94 | u16 reserved; // Reserved - cleared by #mpasmbl | |
95 | u8 xirr_int; // Indicates xXirrValue is valid or Immed IO | |
96 | u8 ipi_cnt; // IPI Count | |
97 | u8 decr_int; // DECR interrupt occurred | |
98 | u8 pdc_int; // PDC interrupt occurred | |
99 | u8 quantum_int; // Interrupt quantum reached | |
100 | u8 old_plic_deferred_ext_int; // Old PLIC has a deferred XIRR pending | |
101 | } fields; | |
102 | } int_dword; | |
103 | ||
104 | // Whenever any fields in this Dword are set then PLIC will defer the | |
105 | // processing of external interrupts. Note that PLIC will store the | |
106 | // XIRR directly into the xXirrValue field so that another XIRR will | |
107 | // not be presented until this one clears. The layout of the low | |
108 | // 4-bytes of this Dword is up to SLIC - PLIC just checks whether the | |
109 | // entire Dword is zero or not. A non-zero value in the low order | |
110 | // 2-bytes will result in SLIC being granted the highest thread | |
111 | // priority upon return. A 0 will return to SLIC as medium priority. | |
112 | u64 plic_defer_ints_area; // Entire Dword | |
113 | ||
114 | // Used to pass the real SRR0/1 from PLIC to SLIC as well as to | |
115 | // pass the target SRR0/1 from SLIC to PLIC on a SetAsrAndRfid. | |
116 | u64 saved_srr0; // Saved SRR0 x10-x17 | |
117 | u64 saved_srr1; // Saved SRR1 x18-x1F | |
118 | ||
119 | // Used to pass parms from the OS to PLIC for SetAsrAndRfid | |
120 | u64 saved_gpr3; // Saved GPR3 x20-x27 | |
121 | u64 saved_gpr4; // Saved GPR4 x28-x2F | |
122 | union { | |
123 | u64 saved_gpr5; /* Saved GPR5 x30-x37 */ | |
124 | struct { | |
125 | u8 cede_latency_hint; /* x30 */ | |
126 | u8 reserved[7]; /* x31-x36 */ | |
127 | } fields; | |
128 | } gpr5_dword; | |
129 | ||
130 | ||
131 | u8 dtl_enable_mask; // Dispatch Trace Log mask x38-x38 | |
132 | u8 donate_dedicated_cpu; // Donate dedicated CPU cycles x39-x39 | |
133 | u8 fpregs_in_use; // FP regs in use x3A-x3A | |
134 | u8 pmcregs_in_use; // PMC regs in use x3B-x3B | |
135 | volatile u32 saved_decr; // Saved Decr Value x3C-x3F | |
136 | volatile u64 emulated_time_base;// Emulated TB for this thread x40-x47 | |
137 | volatile u64 cur_plic_latency; // Unaccounted PLIC latency x48-x4F | |
138 | u64 tot_plic_latency; // Accumulated PLIC latency x50-x57 | |
139 | u64 wait_state_cycles; // Wait cycles for this proc x58-x5F | |
140 | u64 end_of_quantum; // TB at end of quantum x60-x67 | |
141 | u64 pdc_saved_sprg1; // Saved SPRG1 for PMC int x68-x6F | |
142 | u64 pdc_saved_srr0; // Saved SRR0 for PMC int x70-x77 | |
143 | volatile u32 virtual_decr; // Virtual DECR for shared procsx78-x7B | |
144 | u16 slb_count; // # of SLBs to maintain x7C-x7D | |
145 | u8 idle; // Indicate OS is idle x7E | |
146 | u8 vmxregs_in_use; // VMX registers in use x7F | |
147 | ||
148 | ||
149 | //============================================================================= | |
150 | // CACHE_LINE_3 0x0100 - 0x017F: This line is shared with other processors | |
151 | //============================================================================= | |
152 | // This is the yield_count. An "odd" value (low bit on) means that | |
153 | // the processor is yielded (either because of an OS yield or a PLIC | |
154 | // preempt). An even value implies that the processor is currently | |
155 | // executing. | |
156 | // NOTE: This value will ALWAYS be zero for dedicated processors and | |
157 | // will NEVER be zero for shared processors (ie, initialized to a 1). | |
158 | volatile u32 yield_count; // PLIC increments each dispatchx00-x03 | |
159 | volatile u32 dispersion_count; // dispatch changed phys cpu x04-x07 | |
160 | volatile u64 cmo_faults; // CMO page fault count x08-x0F | |
161 | volatile u64 cmo_fault_time; // CMO page fault time x10-x17 | |
162 | u8 reserved7[104]; // Reserved x18-x7F | |
163 | ||
164 | //============================================================================= | |
165 | // CACHE_LINE_4-5 0x0180 - 0x027F Contains PMC interrupt data | |
166 | //============================================================================= | |
167 | u32 page_ins; // CMO Hint - # page ins by OS x00-x03 | |
168 | u8 reserved8[148]; // Reserved x04-x97 | |
169 | volatile u64 dtl_idx; // Dispatch Trace Log head idx x98-x9F | |
170 | u8 reserved9[96]; // Reserved xA0-xFF | |
171 | } __attribute__((__aligned__(0x400))); | |
172 | ||
173 | extern struct lppaca lppaca[]; | |
174 | ||
175 | #define lppaca_of(cpu) (*paca[cpu].lppaca_ptr) | |
176 | ||
177 | /* | |
178 | * SLB shadow buffer structure as defined in the PAPR. The save_area | |
179 | * contains adjacent ESID and VSID pairs for each shadowed SLB. The | |
180 | * ESID is stored in the lower 64bits, then the VSID. | |
181 | */ | |
182 | struct slb_shadow { | |
183 | u32 persistent; // Number of persistent SLBs x00-x03 | |
184 | u32 buffer_length; // Total shadow buffer length x04-x07 | |
185 | u64 reserved; // Alignment x08-x0f | |
186 | struct { | |
187 | u64 esid; | |
188 | u64 vsid; | |
189 | } save_area[SLB_NUM_BOLTED]; // x10-x40 | |
190 | } ____cacheline_aligned; | |
191 | ||
192 | extern struct slb_shadow slb_shadow[]; | |
193 | ||
194 | /* | |
195 | * Layout of entries in the hypervisor's dispatch trace log buffer. | |
196 | */ | |
197 | struct dtl_entry { | |
198 | u8 dispatch_reason; | |
199 | u8 preempt_reason; | |
200 | u16 processor_id; | |
201 | u32 enqueue_to_dispatch_time; | |
202 | u32 ready_to_enqueue_time; | |
203 | u32 waiting_to_ready_time; | |
204 | u64 timebase; | |
205 | u64 fault_addr; | |
206 | u64 srr0; | |
207 | u64 srr1; | |
208 | }; | |
209 | ||
210 | #define DISPATCH_LOG_BYTES 4096 /* bytes per cpu */ | |
211 | #define N_DISPATCH_LOG (DISPATCH_LOG_BYTES / sizeof(struct dtl_entry)) | |
212 | ||
213 | /* | |
214 | * When CONFIG_VIRT_CPU_ACCOUNTING = y, the cpu accounting code controls | |
215 | * reading from the dispatch trace log. If other code wants to consume | |
216 | * DTL entries, it can set this pointer to a function that will get | |
217 | * called once for each DTL entry that gets processed. | |
218 | */ | |
219 | extern void (*dtl_consumer)(struct dtl_entry *entry, u64 index); | |
220 | ||
221 | #endif /* CONFIG_PPC_BOOK3S */ | |
222 | #endif /* __KERNEL__ */ | |
223 | #endif /* _ASM_POWERPC_LPPACA_H */ |