Messages in this thread Patch in this message | | | Date | Wed, 21 Jul 2004 17:36:03 +0200 | From | Geert Uytterhoeven <> | Subject | [PATCH 158] M68k 68060 errata I14 |
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M68k: gcc lately manages to generate the code sequence described in the 060 errata I14, so use the described workaround (from Roman Zippel)
Signed-off-by: Roman Zippel <zippel@linux-m68k.org> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
--- linux-2.4.27-rc3/arch/m68k/kernel/setup.c 2004-04-30 16:35:25.000000000 +0200 +++ linux-m68k-2.4.27-rc3/arch/m68k/kernel/setup.c 2004-07-04 21:55:44.000000000 +0200 @@ -249,6 +249,18 @@ else if (CPU_IS_060) m68k_is040or060 = 6; + if (CPU_IS_060) { + u32 pcr; + + asm (".chip 68060; movec %%pcr,%0; .chip 68k" + : "=d" (pcr)); + if (((pcr >> 8) & 0xff) <= 5) { + printk("Enabling workaround for errata I14\n"); + asm (".chip 68060; movec %0,%%pcr; .chip 68k" + : : "d" (pcr | 0x20)); + } + } + /* FIXME: m68k_fputype is passed in by Penguin booter, which can * be confused by software FPU emulation. BEWARE. * We should really do our own FPU check at startup. Gr{oetje,eeting}s, Geert
-- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org
In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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