From: Geert Uytterhoeven <geert@linux-m68k.org>
To: Linus Torvalds <torvalds@osdl.org>, Andrew Morton <akpm@osdl.org>
Cc: Linux Kernel Development <linux-kernel@vger.kernel.org>,
Geert Uytterhoeven <geert@linux-m68k.org>
Subject: [PATCH 460] M68k 68060 errata I14
Date: Tue, 20 Jul 2004 20:37:57 +0200 [thread overview]
Message-ID: <200407201837.i6KIbvQo015369@anakin.of.borg> (raw)
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-2.6.8-rc2/arch/m68k/kernel/setup.c 2004-05-24 11:13:22.000000000 +0200
+++ linux-m68k-2.6.8-rc2/arch/m68k/kernel/setup.c 2004-07-04 22:03:49.000000000 +0200
@@ -238,6 +238,18 @@
}
#endif
+ 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));
+ }
+ }
+
init_mm.start_code = PAGE_OFFSET;
init_mm.end_code = (unsigned long) &_etext;
init_mm.end_data = (unsigned long) &_edata;
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
reply other threads:[~2004-07-20 18:40 UTC|newest]
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