On Wednesday, October 14, 2015 at 03:38:39 AM, Thomas Chou wrote:
> Convert cache flush to use dm cpu data.
>
> The original cache flush functions are written in assembly
> and use CONFIG_SYS_{I,D}CACHE_SIZE... macros. It is difficult
> to convert to use cache configuration in dm cpu data which is
> extracted from device tree.
>
> The cacheflush.c of Linux nios2 arch uses cpuinfo structure,
> which is very close to our dm cpu data. So we copy and modify
> it to arch/nios2/lib/cache.c to replace the old cache.S.
>
> Signed-off-by: Thomas Chou <[email protected]>
Hi!
[...]
> +static void __flush_dcache(unsigned long start, unsigned long end)
> +{
> + unsigned long addr;
> +
> + start &= ~(gd->arch.dcache_line_size - 1);
> + end += (gd->arch.dcache_line_size - 1);
> + end &= ~(gd->arch.dcache_line_size - 1);
I really don't think we should do this alignment here :-(
> + for (addr = start; addr < end; addr += gd->arch.dcache_line_size) {
> + __asm__ __volatile__ (" flushda 0(%0)\n"
> + : /* Outputs */
> + : /* Inputs */ "r"(addr)
> + /* : No clobber */);
> + }
> +}
[...]
Best regards,
Marek Vasut
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