diff options
author | Ralf Baechle <ralf@linux-mips.org> | 2006-04-05 10:45:45 +0200 |
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committer | Ralf Baechle <ralf@linux-mips.org> | 2006-04-19 04:14:28 +0200 |
commit | 41c594ab65fc89573af296d192aa5235d09717ab (patch) | |
tree | 562462512a320f386bdf49eabfbb26bb3ee761fa /include/asm-mips/smtc.h | |
parent | [MIPS] kpsd and other AP/SP improvements. (diff) | |
download | linux-41c594ab65fc89573af296d192aa5235d09717ab.tar.xz linux-41c594ab65fc89573af296d192aa5235d09717ab.zip |
[MIPS] MT: Improved multithreading support.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'include/asm-mips/smtc.h')
-rw-r--r-- | include/asm-mips/smtc.h | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/include/asm-mips/smtc.h b/include/asm-mips/smtc.h new file mode 100644 index 000000000000..e1941d1b8726 --- /dev/null +++ b/include/asm-mips/smtc.h @@ -0,0 +1,55 @@ +#ifndef _ASM_SMTC_MT_H +#define _ASM_SMTC_MT_H + +/* + * Definitions for SMTC multitasking on MIPS MT cores + */ + +#include <asm/mips_mt.h> + +/* + * System-wide SMTC status information + */ + +extern unsigned int smtc_status; + +#define SMTC_TLB_SHARED 0x00000001 +#define SMTC_MTC_ACTIVE 0x00000002 + +/* + * TLB/ASID Management information + */ + +#define MAX_SMTC_TLBS 2 +#define MAX_SMTC_ASIDS 256 +#if NR_CPUS <= 8 +typedef char asiduse; +#else +#if NR_CPUS <= 16 +typedef short asiduse; +#else +typedef long asiduse; +#endif +#endif + +extern asiduse smtc_live_asid[MAX_SMTC_TLBS][MAX_SMTC_ASIDS]; + +void smtc_get_new_mmu_context(struct mm_struct *mm, unsigned long cpu); + +void smtc_flush_tlb_asid(unsigned long asid); +extern int mipsmt_build_cpu_map(int startslot); +extern void mipsmt_prepare_cpus(void); +extern void smtc_smp_finish(void); +extern void smtc_boot_secondary(int cpu, struct task_struct *t); + +/* + * Sharing the TLB between multiple VPEs means that the + * "random" index selection function is not allowed to + * select the current value of the Index register. To + * avoid additional TLB pressure, the Index registers + * are "parked" with an non-Valid value. + */ + +#define PARKED_INDEX ((unsigned int)0x80000000) + +#endif /* _ASM_SMTC_MT_H */ |