LXR linux/arch/mips/include/asm/smtc.h

   1#ifndef _ASM_SMTC_MT_H
   2#define _ASM_SMTC_MT_H
   3
   4/*
   5 * Definitions for SMTC multitasking on MIPS MT cores
   6 */
   7
   8#include <asm/mips_mt.h>
   9#include <asm/smtc_ipi.h>
  10
  11/*
  12 * System-wide SMTC status information
  13 */
  14
  15extern unsigned int smtc_status;
  16
  17#define SMTC_TLB_SHARED 0x00000001
  18#define SMTC_MTC_ACTIVE 0x00000002
  19
  20/*
  21 * TLB/ASID Management information
  22 */
  23
  24#define MAX_SMTC_TLBS 2
  25#define MAX_SMTC_ASIDS 256
  26#if NR_CPUS <= 8
  27typedef char asiduse;
  28#else
  29#if NR_CPUS <= 16
  30typedef short asiduse;
  31#else
  32typedef long asiduse;
  33#endif
  34#endif
  35
  36extern asiduse smtc_live_asid[MAX_SMTC_TLBS][MAX_SMTC_ASIDS];
  37
  38struct mm_struct;
  39struct task_struct;
  40
  41void smtc_get_new_mmu_context(struct mm_struct *mm, unsigned long cpu);
  42void self_ipi(struct smtc_ipi *);
  43void smtc_flush_tlb_asid(unsigned long asid);
  44extern int smtc_build_cpu_map(int startslot);
  45extern void smtc_prepare_cpus(int cpus);
  46extern void smtc_smp_finish(void);
  47extern void smtc_boot_secondary(int cpu, struct task_struct *t);
  48extern void smtc_cpus_done(void);
  49extern void smtc_init_secondary(void);
  50
  51
  52/*
  53 * Sharing the TLB between multiple VPEs means that the
  54 * "random" index selection function is not allowed to
  55 * select the current value of the Index register. To
  56 * avoid additional TLB pressure, the Index registers
  57 * are "parked" with an non-Valid value.
  58 */
  59
  60#define PARKED_INDEX    ((unsigned int)0x80000000)
  61
  62/*
  63 * Define low-level interrupt mask for IPIs, if necessary.
  64 * By default, use SW interrupt 1, which requires no external
  65 * hardware support, but which works only for single-core
  66 * MIPS MT systems.
  67 */
  68#ifndef MIPS_CPU_IPI_IRQ
  69#define MIPS_CPU_IPI_IRQ 1
  70#endif
  71
  72#endif /*  _ASM_SMTC_MT_H */
  73