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* 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
* 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
#ifdef __KERNEL__
// This control block contains the data that is shared between the
// hypervisor (PLIC) and the OS.
#include <linux/cache.h>
#include <asm/types.h>
#include <asm/mmu.h>
/* 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[80]; // Reserved x30-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 upto 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
u64 saved_gpr5; // Saved GPR5 x30-x37
u8 reserved4; // Reserved 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
u8 reserved6[124]; // Reserved x04-x7F
// CACHE_LINE_4-5 0x0180 - 0x027F Contains PMC interrupt data
u8 pmc_save_area[256]; // PMC interrupt Area x00-xFF
} __attribute__((__aligned__(0x400)));
extern struct lppaca lppaca[];
* 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[];
#endif /* __KERNEL__ */
#endif /* _ASM_POWERPC_LPPACA_H */