Re: R5000SC issues and fix

[Izumi Tsutsui <tsutsui%ceres.dti.ne.jp@localhost>]

> Simply reverting the math change done fixes it, ie:
> 
> ===
> diff --git a/sys/arch/mips/include/cache_r5k.h
> b/sys/arch/mips/include/cache_r5k.h
> index a59fa18fdc02..6bdf9bd688c2 100644
> --- a/sys/arch/mips/include/cache_r5k.h
> +++ b/sys/arch/mips/include/cache_r5k.h
> @@ -68,6 +68,11 @@ void r5k_sdcache_wb_range(register_t, vsize_t);
>  #define        R5K_SC_PAGESIZE         (R5K_SC_LINESIZE * 128)
>  #define        R5K_SC_PAGEMASK         (R5K_SC_PAGESIZE - 1)
> 
> +#if 0
>  #define        mips_r5k_round_page(x)  (((x) + (register_t)R5K_SC_PAGEMASK) \
>                                     & (register_t)R5K_SC_PAGEMASK)
>  #define        mips_r5k_trunc_page(x)  ((x) & (register_t)R5K_SC_PAGEMASK)
> +#else
> +#define        mips_r5k_round_page(x)  round_line(x, PAGE_SIZE)
> +#define        mips_r5k_trunc_page(x)  trunc_line(x, PAGE_SIZE)
> +#endif
> ===

Ah, sorry, my serious botch. It should be:

>>  #define        mips_r5k_round_page(x)  (((x) + (register_t)R5K_SC_PAGEMASK) \
>>                                     & (register_t)~R5K_SC_PAGEMASK)
>>  #define        mips_r5k_trunc_page(x)  ((x) & (register_t)~R5K_SC_PAGEMASK)


The intention was it should be 4096 (i.e. R5K_SC_LINESIZE * 128)
rather than PAGE_SIZE (that could be 8K or 16K etc. per kernel settings).

Thanks,
---
Izumi Tsutsui