PERFORCE change 172680 for review
Rafal Jaworowski
raj at FreeBSD.org
Wed Jan 6 22:18:30 UTC 2010
http://p4web.freebsd.org/chv.cgi?CH=172680
Change 172680 by raj at raj_fdt on 2010/01/06 22:17:59
mpc85xx: Clean up LAW regs early, so we can start with a known state.
Affected files ...
.. //depot/projects/fdt/sys/powerpc/booke/platform_bare.c#3 edit
Differences ...
==== //depot/projects/fdt/sys/powerpc/booke/platform_bare.c#3 (text+ko) ====
@@ -90,7 +90,8 @@
static int
bare_probe(platform_t plat)
{
- uint32_t ver;
+ uint32_t ver, sr;
+ int i, law_max, tgt;
ver = SVR_VER(mfspr(SPR_SVR));
if (ver == SVR_MPC8572E || ver == SVR_MPC8572)
@@ -98,6 +99,23 @@
else
maxcpu = 1;
+ /*
+ * Clear local access windows. Skip DRAM entries, so we don't shoot
+ * ourselves in the foot.
+ */
+ law_max = law_getmax();
+ for (i = 0; i < law_max; i++) {
+ sr = ccsr_read4(OCP85XX_LAWSR(i));
+ if ((sr & 0x80000000) == 0)
+ continue;
+ tgt = (sr & 0x01f00000) >> 20;
+ if (tgt == OCP85XX_TGTIF_RAM1 || tgt == OCP85XX_TGTIF_RAM2 ||
+ tgt == OCP85XX_TGTIF_RAM_INTL)
+ continue;
+
+ ccsr_write4(OCP85XX_LAWSR(i), sr & 0x7fffffff);
+ }
+
return (BUS_PROBE_GENERIC);
}
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