Re: [PATCH] fast path for rdhwr emulation for TLS

[Thiemo Seufer <ths@networkno.de>]

Atsushi Nemoto wrote:
[snip]
> @@ -375,6 +376,72 @@ #endif
>       BUILD_HANDLER dsp dsp sti silent                /* #26 */
>       BUILD_HANDLER reserved reserved sti verbose     /* others */
>  
> +     .align  5
> +     LEAF(handle_ri_rdhwr_vivt)
> +#ifdef CONFIG_MIPS_MT_SMTC
> +     PANIC_PIC("handle_ri_rdhwr_vivt called")
> +#else
> +     .set    push
> +     .set    noat
> +     .set    noreorder
> +     /* check if TLB contains a entry for EPC */
> +     MFC0    k1, CP0_ENTRYHI
> +     andi    k1, 0xff        /* ASID_MASK */
> +     MFC0    k0, CP0_EPC
> +     PTR_SRL k0, PAGE_SHIFT + 1
> +     PTR_SLL k0, PAGE_SHIFT + 1
> +     or      k1, k0
> +     MTC0    k1, CP0_ENTRYHI
> +     mtc0_tlbw_hazard
> +     tlbp

This needs a .set mips3/.set mips0 pair.

> +#ifdef CONFIG_CPU_MIPSR2
> +     _ehb                    /* tlb_probe_hazard */
> +#else
> +     nop; nop; nop; nop; nop; nop    /* tlb_probe_hazard */
> +#endif

What about a mtc0_tlbp_hazard macro here?


Thiemo