include/asm-powerpc/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 //=============================================================================
  24 //
  25 //      This control block contains the data that is shared between the
  26 //      hypervisor (PLIC) and the OS.
  27 //
  28 //
  29 //----------------------------------------------------------------------------
  30 #include <linux/cache.h>
  31 #include <asm/types.h>
  32 #include <asm/mmu.h>
  33
  34 /* The Hypervisor barfs if the lppaca crosses a page boundary.  A 1k
  35  * alignment is sufficient to prevent this */
  36 struct lppaca {
  37 //=============================================================================
  38 // CACHE_LINE_1 0x0000 - 0x007F Contains read-only data
  39 // NOTE: The xDynXyz fields are fields that will be dynamically changed by
  40 // PLIC when preparing to bring a processor online or when dispatching a
  41 // virtual processor!
  42 //=============================================================================
  43         u32     desc;                   // Eye catcher 0xD397D781       x00-x03
  44         u16     size;                   // Size of this struct          x04-x05
  45         u16     reserved1;              // Reserved                     x06-x07
  46         u16     reserved2:14;           // Reserved                     x08-x09
  47         u8      shared_proc:1;          // Shared processor indicator   ...
  48         u8      secondary_thread:1;     // Secondary thread indicator   ...
  49         volatile u8 dyn_proc_status:8;  // Dynamic Status of this proc  x0A-x0A
  50         u8      secondary_thread_count; // Secondary thread count       x0B-x0B
  51         volatile u16 dyn_hv_phys_proc_index;// Dynamic HV Physical Proc Index0C-x0D
  52         volatile u16 dyn_hv_log_proc_index;// Dynamic HV Logical Proc Indexx0E-x0F
  53         u32     decr_val;               // Value for Decr programming   x10-x13
  54         u32     pmc_val;                // Value for PMC regs           x14-x17
  55         volatile u32 dyn_hw_node_id;    // Dynamic Hardware Node id     x18-x1B
  56         volatile u32 dyn_hw_proc_id;    // Dynamic Hardware Proc Id     x1C-x1F
  57         volatile u32 dyn_pir;           // Dynamic ProcIdReg value      x20-x23
  58         u32     dsei_data;              // DSEI data                    x24-x27
  59         u64     sprg3;                  // SPRG3 value                  x28-x2F
  60         u8      reserved3[80];          // Reserved                     x30-x7F
  61
  62 //=============================================================================
  63 // CACHE_LINE_2 0x0080 - 0x00FF Contains local read-write data
  64 //=============================================================================
  65         // This Dword contains a byte for each type of interrupt that can occur.
  66         // The IPI is a count while the others are just a binary 1 or 0.
  67         union {
  68                 u64     any_int;
  69                 struct {
  70                         u16     reserved;       // Reserved - cleared by #mpasmbl
  71                         u8      xirr_int;       // Indicates xXirrValue is valid or Immed IO
  72                         u8      ipi_cnt;        // IPI Count
  73                         u8      decr_int;       // DECR interrupt occurred
  74                         u8      pdc_int;        // PDC interrupt occurred
  75                         u8      quantum_int;    // Interrupt quantum reached
  76                         u8      old_plic_deferred_ext_int;      // Old PLIC has a deferred XIRR pending
  77                 } fields;
  78         } int_dword;
  79
  80         // Whenever any fields in this Dword are set then PLIC will defer the
  81         // processing of external interrupts.  Note that PLIC will store the
  82         // XIRR directly into the xXirrValue field so that another XIRR will
  83         // not be presented until this one clears.  The layout of the low
  84         // 4-bytes of this Dword is upto SLIC - PLIC just checks whether the
  85         // entire Dword is zero or not.  A non-zero value in the low order
  86         // 2-bytes will result in SLIC being granted the highest thread
  87         // priority upon return.  A 0 will return to SLIC as medium priority.
  88         u64     plic_defer_ints_area;   // Entire Dword
  89
  90         // Used to pass the real SRR0/1 from PLIC to SLIC as well as to
  91         // pass the target SRR0/1 from SLIC to PLIC on a SetAsrAndRfid.
  92         u64     saved_srr0;             // Saved SRR0                   x10-x17
  93         u64     saved_srr1;             // Saved SRR1                   x18-x1F
  94
  95         // Used to pass parms from the OS to PLIC for SetAsrAndRfid
  96         u64     saved_gpr3;             // Saved GPR3                   x20-x27
  97         u64     saved_gpr4;             // Saved GPR4                   x28-x2F
  98         u64     saved_gpr5;             // Saved GPR5                   x30-x37
  99
 100         u8      reserved4;              // Reserved                     x38-x38
 101         u8      cpuctls_task_attrs;     // Task attributes for cpuctls  x39-x39
 102         u8      fpregs_in_use;          // FP regs in use               x3A-x3A
 103         u8      pmcregs_in_use;         // PMC regs in use              x3B-x3B
 104         volatile u32 saved_decr;        // Saved Decr Value             x3C-x3F
 105         volatile u64 emulated_time_base;// Emulated TB for this thread  x40-x47
 106         volatile u64 cur_plic_latency;  // Unaccounted PLIC latency     x48-x4F
 107         u64     tot_plic_latency;       // Accumulated PLIC latency     x50-x57
 108         u64     wait_state_cycles;      // Wait cycles for this proc    x58-x5F
 109         u64     end_of_quantum;         // TB at end of quantum         x60-x67
 110         u64     pdc_saved_sprg1;        // Saved SPRG1 for PMC int      x68-x6F
 111         u64     pdc_saved_srr0;         // Saved SRR0 for PMC int       x70-x77
 112         volatile u32 virtual_decr;      // Virtual DECR for shared procsx78-x7B
 113         u16     slb_count;              // # of SLBs to maintain        x7C-x7D
 114         u8      idle;                   // Indicate OS is idle          x7E
 115         u8      vmxregs_in_use;         // VMX registers in use         x7F
 116
 117
 118 //=============================================================================
 119 // CACHE_LINE_3 0x0100 - 0x017F: This line is shared with other processors
 120 //=============================================================================
 121         // This is the yield_count.  An "odd" value (low bit on) means that
 122         // the processor is yielded (either because of an OS yield or a PLIC
 123         // preempt).  An even value implies that the processor is currently
 124         // executing.
 125         // NOTE: This value will ALWAYS be zero for dedicated processors and
 126         // will NEVER be zero for shared processors (ie, initialized to a 1).
 127         volatile u32 yield_count;       // PLIC increments each dispatchx00-x03
 128         u8      reserved6[124];         // Reserved                     x04-x7F
 129
 130 //=============================================================================
 131 // CACHE_LINE_4-5 0x0180 - 0x027F Contains PMC interrupt data
 132 //=============================================================================
 133         u8      pmc_save_area[256];     // PMC interrupt Area           x00-xFF
 134 } __attribute__((__aligned__(0x400)));
 135
 136 extern struct lppaca lppaca[];
 137
 138 /*
 139  * SLB shadow buffer structure as defined in the PAPR.  The save_area
 140  * contains adjacent ESID and VSID pairs for each shadowed SLB.  The
 141  * ESID is stored in the lower 64bits, then the VSID.
 142  */
 143 struct slb_shadow {
 144         u32     persistent;             // Number of persistent SLBs    x00-x03
 145         u32     buffer_length;          // Total shadow buffer length   x04-x07
 146         u64     reserved;               // Alignment                    x08-x0f
 147         struct  {
 148                 u64     esid;
 149                 u64     vsid;
 150         } save_area[SLB_NUM_BOLTED];    //                              x10-x40
 151 } ____cacheline_aligned;
 152
 153 extern struct slb_shadow slb_shadow[];
 154
 155 #endif /* __KERNEL__ */
 156 #endif /* _ASM_POWERPC_LPPACA_H */