| /* |
| * lppaca.h |
| * Copyright (C) 2001 Mike Corrigan IBM Corporation |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| */ |
| #ifndef _ASM_POWERPC_LPPACA_H |
| #define _ASM_POWERPC_LPPACA_H |
| #ifdef __KERNEL__ |
| |
| /* These definitions relate to hypervisors that only exist when using |
| * a server type processor |
| */ |
| #ifdef CONFIG_PPC_BOOK3S |
| |
| //============================================================================= |
| // |
| // This control block contains the data that is shared between the |
| // hypervisor (PLIC) and the OS. |
| // |
| // |
| //---------------------------------------------------------------------------- |
| #include <linux/cache.h> |
| #include <linux/threads.h> |
| #include <asm/types.h> |
| #include <asm/mmu.h> |
| |
| /* |
| * We only have to have statically allocated lppaca structs on |
| * legacy iSeries, which supports at most 64 cpus. |
| */ |
| #ifdef CONFIG_PPC_ISERIES |
| #if NR_CPUS < 64 |
| #define NR_LPPACAS NR_CPUS |
| #else |
| #define NR_LPPACAS 64 |
| #endif |
| #else /* not iSeries */ |
| #define NR_LPPACAS 1 |
| #endif |
| |
| |
| /* The Hypervisor barfs if the lppaca crosses a page boundary. A 1k |
| * alignment is sufficient to prevent this */ |
| struct lppaca { |
| //============================================================================= |
| // CACHE_LINE_1 0x0000 - 0x007F Contains read-only data |
| // NOTE: The xDynXyz fields are fields that will be dynamically changed by |
| // PLIC when preparing to bring a processor online or when dispatching a |
| // virtual processor! |
| //============================================================================= |
| u32 desc; // Eye catcher 0xD397D781 x00-x03 |
| u16 size; // Size of this struct x04-x05 |
| u16 reserved1; // Reserved x06-x07 |
| u16 reserved2:14; // Reserved x08-x09 |
| u8 shared_proc:1; // Shared processor indicator ... |
| u8 secondary_thread:1; // Secondary thread indicator ... |
| volatile u8 dyn_proc_status:8; // Dynamic Status of this proc x0A-x0A |
| u8 secondary_thread_count; // Secondary thread count x0B-x0B |
| volatile u16 dyn_hv_phys_proc_index;// Dynamic HV Physical Proc Index0C-x0D |
| volatile u16 dyn_hv_log_proc_index;// Dynamic HV Logical Proc Indexx0E-x0F |
| u32 decr_val; // Value for Decr programming x10-x13 |
| u32 pmc_val; // Value for PMC regs x14-x17 |
| volatile u32 dyn_hw_node_id; // Dynamic Hardware Node id x18-x1B |
| volatile u32 dyn_hw_proc_id; // Dynamic Hardware Proc Id x1C-x1F |
| volatile u32 dyn_pir; // Dynamic ProcIdReg value x20-x23 |
| u32 dsei_data; // DSEI data x24-x27 |
| u64 sprg3; // SPRG3 value x28-x2F |
| u8 reserved3[40]; // Reserved x30-x57 |
| volatile u8 vphn_assoc_counts[8]; // Virtual processor home node |
| // associativity change counters x58-x5F |
| u8 reserved4[32]; // Reserved x60-x7F |
| |
| //============================================================================= |
| // CACHE_LINE_2 0x0080 - 0x00FF Contains local read-write data |
| //============================================================================= |
| // This Dword contains a byte for each type of interrupt that can occur. |
| // The IPI is a count while the others are just a binary 1 or 0. |
| union { |
| u64 any_int; |
| struct { |
| u16 reserved; // Reserved - cleared by #mpasmbl |
| u8 xirr_int; // Indicates xXirrValue is valid or Immed IO |
| u8 ipi_cnt; // IPI Count |
| u8 decr_int; // DECR interrupt occurred |
| u8 pdc_int; // PDC interrupt occurred |
| u8 quantum_int; // Interrupt quantum reached |
| u8 old_plic_deferred_ext_int; // Old PLIC has a deferred XIRR pending |
| } fields; |
| } int_dword; |
| |
| // Whenever any fields in this Dword are set then PLIC will defer the |
| // processing of external interrupts. Note that PLIC will store the |
| // XIRR directly into the xXirrValue field so that another XIRR will |
| // not be presented until this one clears. The layout of the low |
| // 4-bytes of this Dword is up to SLIC - PLIC just checks whether the |
| // entire Dword is zero or not. A non-zero value in the low order |
| // 2-bytes will result in SLIC being granted the highest thread |
| // priority upon return. A 0 will return to SLIC as medium priority. |
| u64 plic_defer_ints_area; // Entire Dword |
| |
| // Used to pass the real SRR0/1 from PLIC to SLIC as well as to |
| // pass the target SRR0/1 from SLIC to PLIC on a SetAsrAndRfid. |
| u64 saved_srr0; // Saved SRR0 x10-x17 |
| u64 saved_srr1; // Saved SRR1 x18-x1F |
| |
| // Used to pass parms from the OS to PLIC for SetAsrAndRfid |
| u64 saved_gpr3; // Saved GPR3 x20-x27 |
| u64 saved_gpr4; // Saved GPR4 x28-x2F |
| union { |
| u64 saved_gpr5; /* Saved GPR5 x30-x37 */ |
| struct { |
| u8 cede_latency_hint; /* x30 */ |
| u8 reserved[7]; /* x31-x36 */ |
| } fields; |
| } gpr5_dword; |
| |
| |
| u8 dtl_enable_mask; // Dispatch Trace Log mask x38-x38 |
| u8 donate_dedicated_cpu; // Donate dedicated CPU cycles x39-x39 |
| u8 fpregs_in_use; // FP regs in use x3A-x3A |
| u8 pmcregs_in_use; // PMC regs in use x3B-x3B |
| volatile u32 saved_decr; // Saved Decr Value x3C-x3F |
| volatile u64 emulated_time_base;// Emulated TB for this thread x40-x47 |
| volatile u64 cur_plic_latency; // Unaccounted PLIC latency x48-x4F |
| u64 tot_plic_latency; // Accumulated PLIC latency x50-x57 |
| u64 wait_state_cycles; // Wait cycles for this proc x58-x5F |
| u64 end_of_quantum; // TB at end of quantum x60-x67 |
| u64 pdc_saved_sprg1; // Saved SPRG1 for PMC int x68-x6F |
| u64 pdc_saved_srr0; // Saved SRR0 for PMC int x70-x77 |
| volatile u32 virtual_decr; // Virtual DECR for shared procsx78-x7B |
| u16 slb_count; // # of SLBs to maintain x7C-x7D |
| u8 idle; // Indicate OS is idle x7E |
| u8 vmxregs_in_use; // VMX registers in use x7F |
| |
| |
| //============================================================================= |
| // CACHE_LINE_3 0x0100 - 0x017F: This line is shared with other processors |
| //============================================================================= |
| // This is the yield_count. An "odd" value (low bit on) means that |
| // the processor is yielded (either because of an OS yield or a PLIC |
| // preempt). An even value implies that the processor is currently |
| // executing. |
| // NOTE: This value will ALWAYS be zero for dedicated processors and |
| // will NEVER be zero for shared processors (ie, initialized to a 1). |
| volatile u32 yield_count; // PLIC increments each dispatchx00-x03 |
| volatile u32 dispersion_count; // dispatch changed phys cpu x04-x07 |
| volatile u64 cmo_faults; // CMO page fault count x08-x0F |
| volatile u64 cmo_fault_time; // CMO page fault time x10-x17 |
| u8 reserved7[104]; // Reserved x18-x7F |
| |
| //============================================================================= |
| // CACHE_LINE_4-5 0x0180 - 0x027F Contains PMC interrupt data |
| //============================================================================= |
| u32 page_ins; // CMO Hint - # page ins by OS x00-x03 |
| u8 reserved8[148]; // Reserved x04-x97 |
| volatile u64 dtl_idx; // Dispatch Trace Log head idx x98-x9F |
| u8 reserved9[96]; // Reserved xA0-xFF |
| } __attribute__((__aligned__(0x400))); |
| |
| extern struct lppaca lppaca[]; |
| |
| #define lppaca_of(cpu) (*paca[cpu].lppaca_ptr) |
| |
| /* |
| * SLB shadow buffer structure as defined in the PAPR. The save_area |
| * contains adjacent ESID and VSID pairs for each shadowed SLB. The |
| * ESID is stored in the lower 64bits, then the VSID. |
| */ |
| struct slb_shadow { |
| u32 persistent; // Number of persistent SLBs x00-x03 |
| u32 buffer_length; // Total shadow buffer length x04-x07 |
| u64 reserved; // Alignment x08-x0f |
| struct { |
| u64 esid; |
| u64 vsid; |
| } save_area[SLB_NUM_BOLTED]; // x10-x40 |
| } ____cacheline_aligned; |
| |
| extern struct slb_shadow slb_shadow[]; |
| |
| /* |
| * Layout of entries in the hypervisor's dispatch trace log buffer. |
| */ |
| struct dtl_entry { |
| u8 dispatch_reason; |
| u8 preempt_reason; |
| u16 processor_id; |
| u32 enqueue_to_dispatch_time; |
| u32 ready_to_enqueue_time; |
| u32 waiting_to_ready_time; |
| u64 timebase; |
| u64 fault_addr; |
| u64 srr0; |
| u64 srr1; |
| }; |
| |
| #define DISPATCH_LOG_BYTES 4096 /* bytes per cpu */ |
| #define N_DISPATCH_LOG (DISPATCH_LOG_BYTES / sizeof(struct dtl_entry)) |
| |
| extern struct kmem_cache *dtl_cache; |
| |
| /* |
| * When CONFIG_VIRT_CPU_ACCOUNTING = y, the cpu accounting code controls |
| * reading from the dispatch trace log. If other code wants to consume |
| * DTL entries, it can set this pointer to a function that will get |
| * called once for each DTL entry that gets processed. |
| */ |
| extern void (*dtl_consumer)(struct dtl_entry *entry, u64 index); |
| |
| #endif /* CONFIG_PPC_BOOK3S */ |
| #endif /* __KERNEL__ */ |
| #endif /* _ASM_POWERPC_LPPACA_H */ |
