arch/powerpc/include/asm/lppaca.h

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