Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | */ |
David Gibson | 8882a4d | 2005-11-09 13:38:01 +1100 | [diff] [blame] | 19 | #ifndef _ASM_POWERPC_LPPACA_H |
| 20 | #define _ASM_POWERPC_LPPACA_H |
Arnd Bergmann | 88ced03 | 2005-12-16 22:43:46 +0100 | [diff] [blame] | 21 | #ifdef __KERNEL__ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | |
| 23 | //============================================================================= |
| 24 | // |
| 25 | // This control block contains the data that is shared between the |
| 26 | // hypervisor (PLIC) and the OS. |
| 27 | // |
| 28 | // |
| 29 | //---------------------------------------------------------------------------- |
Michael Neuling | 2f6093c | 2006-08-07 16:19:19 +1000 | [diff] [blame^] | 30 | #include <linux/cache.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | #include <asm/types.h> |
Michael Neuling | 2f6093c | 2006-08-07 16:19:19 +1000 | [diff] [blame^] | 32 | #include <asm/mmu.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | |
David Gibson | 3356bb9f7 | 2006-01-13 10:26:42 +1100 | [diff] [blame] | 34 | /* The Hypervisor barfs if the lppaca crosses a page boundary. A 1k |
| 35 | * alignment is sufficient to prevent this */ |
Bryan O'Sullivan | c6b3fea | 2006-01-17 17:00:05 -0800 | [diff] [blame] | 36 | struct lppaca { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 |
Olof Johansson | 233ccd0 | 2005-09-03 15:55:59 -0700 | [diff] [blame] | 115 | u8 vmxregs_in_use; // VMX registers in use x7F |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 116 | |
| 117 | |
| 118 | //============================================================================= |
| 119 | // CACHE_LINE_3 0x0100 - 0x007F: 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 0x0100 - 0x01FF Contains PMC interrupt data |
| 132 | //============================================================================= |
| 133 | u8 pmc_save_area[256]; // PMC interrupt Area x00-xFF |
Bryan O'Sullivan | c6b3fea | 2006-01-17 17:00:05 -0800 | [diff] [blame] | 134 | } __attribute__((__aligned__(0x400))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 135 | |
David Gibson | 3356bb9f7 | 2006-01-13 10:26:42 +1100 | [diff] [blame] | 136 | extern struct lppaca lppaca[]; |
| 137 | |
Michael Neuling | 2f6093c | 2006-08-07 16:19:19 +1000 | [diff] [blame^] | 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 | |
Arnd Bergmann | 88ced03 | 2005-12-16 22:43:46 +0100 | [diff] [blame] | 155 | #endif /* __KERNEL__ */ |
David Gibson | 8882a4d | 2005-11-09 13:38:01 +1100 | [diff] [blame] | 156 | #endif /* _ASM_POWERPC_LPPACA_H */ |