From: "Andrew Isaacson" <adi@broadcom.com>
To: linux-mips@linux-mips.org
Subject: [PATCH 12/12] pci-expmem-hack
Date: Wed, 19 Oct 2005 23:59:46 -0700 [thread overview]
Message-ID: <20051020065946.GL23899@broadcom.com> (raw)
In-Reply-To: <20051020065320.GA23857@broadcom.com>
CFE 1.2.5 and earlier fails to turn on the ExpMemEn bit in the
PCIFeatureControl register, which means that DMA does not work
beyond physical address 01_0000_0000, ergo to DRAM beyond 1GB.
With ExpMemEn turned on, 01_0000_0000-0f_ffff_ffff is mapped,
so DMA works for up to 61 GB of DRAM.
Will be fixed in CFE 1.2.6 (yet to be released).
Signed-Off-By: Andy Isaacson <adi@broadcom.com>
arch/mips/pci/pci-bcm1480.c | 8 ++++++++
1 files changed, 8 insertions(+)
Index: lmo/arch/mips/pci/pci-bcm1480.c
===================================================================
--- lmo.orig/arch/mips/pci/pci-bcm1480.c 2005-10-19 22:34:13.000000000 -0700
+++ lmo/arch/mips/pci/pci-bcm1480.c 2005-10-19 22:34:13.000000000 -0700
@@ -232,6 +232,14 @@
bcm1480_bus_status |= PCI_BUS_ENABLED;
}
+ /* turn on ExpMemEn */
+ cmdreg = READCFG32(CFGOFFSET(0, PCI_DEVFN(PCI_BRIDGE_DEVICE, 0), 0x40));
+ printk("PCIFeatureCtrl = %x\n", cmdreg);
+ WRITECFG32(CFGOFFSET(0, PCI_DEVFN(PCI_BRIDGE_DEVICE, 0), 0x40),
+ cmdreg | 0x10);
+ cmdreg = READCFG32(CFGOFFSET(0, PCI_DEVFN(PCI_BRIDGE_DEVICE, 0), 0x40));
+ printk("PCIFeatureCtrl = %x\n", cmdreg);
+
/*
* Establish mappings in KSEG2 (kernel virtual) to PCI I/O
* space. Use "match bytes" policy to make everything look
prev parent reply other threads:[~2005-10-20 7:05 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-10-20 6:53 [PATCH 0/12] bcm1480 support Andrew Isaacson
2005-10-20 6:54 ` [PATCH 1/12] sibyte-fixes Andrew Isaacson
2005-10-20 6:55 ` [PATCH 2/12] 1480-headers Andrew Isaacson
2005-10-20 6:55 ` [PATCH 3/12] sibyte-header-cleanup Andrew Isaacson
2005-10-20 6:56 ` [PATCH 4/12] sb1a-support Andrew Isaacson
2005-10-20 6:56 ` [PATCH 5/12] 1480-support Andrew Isaacson
2005-10-20 6:57 ` [PATCH 6/12] bigsur-support Andrew Isaacson
2005-10-20 6:57 ` [PATCH 7/12] sb1-cache-exc-handling Andrew Isaacson
2005-10-20 6:57 ` [PATCH 8/12] cerr-printk-not-prom-printf Andrew Isaacson
2005-10-20 10:49 ` Ralf Baechle
2005-10-20 11:02 ` Dominic Sweetman
2005-10-20 11:17 ` Ralf Baechle
2005-10-20 6:58 ` [PATCH 9/12] sbmac-fixes Andrew Isaacson
2005-10-20 6:58 ` [PATCH 10/12] 1480-pci-support Andrew Isaacson
2005-10-20 6:59 ` [PATCH 11/12] 1480-ht-support Andrew Isaacson
2005-10-20 6:59 ` Andrew Isaacson [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20051020065946.GL23899@broadcom.com \
--to=adi@broadcom.com \
--cc=linux-mips@linux-mips.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.