[src/trunk]: src/sys/arch/arm/broadcom Don't initialize PCIe inbound windows....

[matt <matt%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/80c05c683928
branches:  trunk
changeset: 781737:80c05c683928
user:      matt <matt%NetBSD.org@localhost>
date:      Thu Sep 27 00:25:26 2012 +0000

description:
Don't initialize PCIe inbound windows.  This avoids the 256MB limitation
on DMAs.

diffstat:

 sys/arch/arm/broadcom/bcm53xx_pax.c |  12 +++++++++---
 1 files changed, 9 insertions(+), 3 deletions(-)

diffs (46 lines):

diff -r 605d606fe746 -r 80c05c683928 sys/arch/arm/broadcom/bcm53xx_pax.c
--- a/sys/arch/arm/broadcom/bcm53xx_pax.c       Thu Sep 27 00:24:36 2012 +0000
+++ b/sys/arch/arm/broadcom/bcm53xx_pax.c       Thu Sep 27 00:25:26 2012 +0000
@@ -34,7 +34,7 @@
 
 #include <sys/cdefs.h>
 
-__KERNEL_RCSID(1, "$NetBSD: bcm53xx_pax.c,v 1.4 2012/09/22 01:47:46 matt Exp $");
+__KERNEL_RCSID(1, "$NetBSD: bcm53xx_pax.c,v 1.5 2012/09/27 00:25:26 matt Exp $");
 
 #include <sys/bus.h>
 #include <sys/device.h>
@@ -146,10 +146,10 @@
 static int
 bcmpax_iwin_init(struct bcmpax_softc *sc)
 {
+#if 0
        uint32_t megs = (physical_end + 0xfffff - physical_start) >> 20;
        uint32_t iwin_megs = min(256, megs);
 #if 1
-#if 1
        bus_addr_t iwin1_start = physical_start;
 #else
        bus_addr_t iwin1_start = 0;
@@ -173,7 +173,6 @@
 #endif
                bcmpax_conf_write(sc, 0, PCI_MAPREG_START+8, iwin2_start);
        }
-#endif
 
        if (megs <= iwin_megs) {
                /*
@@ -184,6 +183,13 @@
 
        return bus_dmatag_subregion(sc->sc_dmat, physical_start,
            physical_start + (iwin_megs << 20) - 1, &sc->sc_dmat, 0);
+#else
+       bcmpax_write_4(sc, PCIE_IARR_1_LOWER, 0);
+       bcmpax_write_4(sc, PCIE_FUNC0_IMAP1, 0);
+       bcmpax_write_4(sc, PCIE_IARR_2_LOWER, 0);
+       bcmpax_write_4(sc, PCIE_FUNC0_IMAP2, 0);
+       return 0;
+#endif
 }
 
 static void