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 <asm/types.h>
  31
  32 /* The Hypervisor barfs if the lppaca crosses a page boundary.  A 1k
  33  * alignment is sufficient to prevent this */
  34 struct __attribute__((__aligned__(0x400))) lppaca {
  35 //=============================================================================
  36 // CACHE_LINE_1 0x0000 - 0x007F Contains read-only data
  37 // NOTE: The xDynXyz fields are fields that will be dynamically changed by
  38 // PLIC when preparing to bring a processor online or when dispatching a
  39 // virtual processor!
  40 //=============================================================================
  41         u32     desc;                   // Eye catcher 0xD397D781       x00-x03
  42         u16     size;                   // Size of this struct          x04-x05
  43         u16     reserved1;              // Reserved                     x06-x07
  44         u16     reserved2:14;           // Reserved                     x08-x09
  45         u8      shared_proc:1;          // Shared processor indicator   ...
  46         u8      secondary_thread:1;     // Secondary thread indicator   ...
  47         volatile u8 dyn_proc_status:8;  // Dynamic Status of this proc  x0A-x0A
  48         u8      secondary_thread_count; // Secondary thread count       x0B-x0B
  49         volatile u16 dyn_hv_phys_proc_index;// Dynamic HV Physical Proc Index0C-x0D
  50         volatile u16 dyn_hv_log_proc_index;// Dynamic HV Logical Proc Indexx0E-x0F
  51         u32     decr_val;               // Value for Decr programming   x10-x13
  52         u32     pmc_val;                // Value for PMC regs           x14-x17
  53         volatile u32 dyn_hw_node_id;    // Dynamic Hardware Node id     x18-x1B
  54         volatile u32 dyn_hw_proc_id;    // Dynamic Hardware Proc Id     x1C-x1F
  55         volatile u32 dyn_pir;           // Dynamic ProcIdReg value      x20-x23
  56         u32     dsei_data;              // DSEI data                    x24-x27
  57         u64     sprg3;                  // SPRG3 value                  x28-x2F
  58         u8      reserved3[80];          // Reserved                     x30-x7F
  59
  60 //=============================================================================
  61 // CACHE_LINE_2 0x0080 - 0x00FF Contains local read-write data
  62 //=============================================================================
  63         // This Dword contains a byte for each type of interrupt that can occur.
  64         // The IPI is a count while the others are just a binary 1 or 0.
  65         union {
  66                 u64     any_int;
  67                 struct {
  68                         u16     reserved;       // Reserved - cleared by #mpasmbl
  69                         u8      xirr_int;       // Indicates xXirrValue is valid or Immed IO
  70                         u8      ipi_cnt;        // IPI Count
  71                         u8      decr_int;       // DECR interrupt occurred
  72                         u8      pdc_int;        // PDC interrupt occurred
  73                         u8      quantum_int;    // Interrupt quantum reached
  74                         u8      old_plic_deferred_ext_int;      // Old PLIC has a deferred XIRR pending
  75                 } fields;
  76         } int_dword;
  77
  78         // Whenever any fields in this Dword are set then PLIC will defer the
  79         // processing of external interrupts.  Note that PLIC will store the
  80         // XIRR directly into the xXirrValue field so that another XIRR will
  81         // not be presented until this one clears.  The layout of the low
  82         // 4-bytes of this Dword is upto SLIC - PLIC just checks whether the
  83         // entire Dword is zero or not.  A non-zero value in the low order
  84         // 2-bytes will result in SLIC being granted the highest thread
  85         // priority upon return.  A 0 will return to SLIC as medium priority.
  86         u64     plic_defer_ints_area;   // Entire Dword
  87
  88         // Used to pass the real SRR0/1 from PLIC to SLIC as well as to
  89         // pass the target SRR0/1 from SLIC to PLIC on a SetAsrAndRfid.
  90         u64     saved_srr0;             // Saved SRR0                   x10-x17
  91         u64     saved_srr1;             // Saved SRR1                   x18-x1F
  92
  93         // Used to pass parms from the OS to PLIC for SetAsrAndRfid
  94         u64     saved_gpr3;             // Saved GPR3                   x20-x27
  95         u64     saved_gpr4;             // Saved GPR4                   x28-x2F
  96         u64     saved_gpr5;             // Saved GPR5                   x30-x37
  97
  98         u8      reserved4;              // Reserved                     x38-x38
  99         u8      cpuctls_task_attrs;     // Task attributes for cpuctls  x39-x39
 100         u8      fpregs_in_use;          // FP regs in use               x3A-x3A
 101         u8      pmcregs_in_use;         // PMC regs in use              x3B-x3B
 102         volatile u32 saved_decr;        // Saved Decr Value             x3C-x3F
 103         volatile u64 emulated_time_base;// Emulated TB for this thread  x40-x47
 104         volatile u64 cur_plic_latency;  // Unaccounted PLIC latency     x48-x4F
 105         u64     tot_plic_latency;       // Accumulated PLIC latency     x50-x57
 106         u64     wait_state_cycles;      // Wait cycles for this proc    x58-x5F
 107         u64     end_of_quantum;         // TB at end of quantum         x60-x67
 108         u64     pdc_saved_sprg1;        // Saved SPRG1 for PMC int      x68-x6F
 109         u64     pdc_saved_srr0;         // Saved SRR0 for PMC int       x70-x77
 110         volatile u32 virtual_decr;      // Virtual DECR for shared procsx78-x7B
 111         u16     slb_count;              // # of SLBs to maintain        x7C-x7D
 112         u8      idle;                   // Indicate OS is idle          x7E
 113         u8      vmxregs_in_use;         // VMX registers in use         x7F
 114
 115
 116 //=============================================================================
 117 // CACHE_LINE_3 0x0100 - 0x007F: This line is shared with other processors
 118 //=============================================================================
 119         // This is the yield_count.  An "odd" value (low bit on) means that
 120         // the processor is yielded (either because of an OS yield or a PLIC
 121         // preempt).  An even value implies that the processor is currently
 122         // executing.
 123         // NOTE: This value will ALWAYS be zero for dedicated processors and
 124         // will NEVER be zero for shared processors (ie, initialized to a 1).
 125         volatile u32 yield_count;       // PLIC increments each dispatchx00-x03
 126         u8      reserved6[124];         // Reserved                     x04-x7F
 127
 128 //=============================================================================
 129 // CACHE_LINE_4-5 0x0100 - 0x01FF Contains PMC interrupt data
 130 //=============================================================================
 131         u8      pmc_save_area[256];     // PMC interrupt Area           x00-xFF
 132 };
 133
 134 extern struct lppaca lppaca[];
 135
 136 #endif /* __KERNEL__ */
 137 #endif /* _ASM_POWERPC_LPPACA_H */