From: Chuck Ebbert <76306.1226@compuserve.com>
To: Barry Scott <barry.scott@onelan.co.uk>
Cc: linux-kernel <linux-kernel@vger.kernel.org>
Subject: Re: 2.6.17-rc6 does not boot on HP dc7600u - MCFG area is not E820-reserved
Date: Thu, 15 Jun 2006 23:00:03 -0400 [thread overview]
Message-ID: <200606152301_MC3-1-C28E-ADE1@compuserve.com> (raw)
In-Reply-To: <44915098.3070404@onelan.co.uk>
On Thu, 15 Jun 2006 13:20:40, Barry Scott wrote:
> I'm trying to boot 2.6.17-rc6 with Mismatched section patches applied.
>
> On my HP dc7600U the last messages printed are:
>
> PCI: BUIS Bug: MCFG area is not E820-reserved
> PCI: Not using MMCONFIG
I posted this today. Please test. It is less picky and will print
the address of the MMCONFIG area if it fails.
--- 2.6.17-rc6-64.orig/arch/i386/pci/mmconfig.c
+++ 2.6.17-rc6-64/arch/i386/pci/mmconfig.c
@@ -15,7 +15,9 @@
#include <asm/e820.h>
#include "pci.h"
-#define MMCONFIG_APER_SIZE (256*1024*1024)
+/* aperture is up to 256MB but BIOS may reserve less */
+#define MMCONFIG_APER_MIN (2 * 1024*1024)
+#define MMCONFIG_APER_MAX (256 * 1024*1024)
/* Assume systems with more busses have correct MCFG */
#define MAX_CHECK_BUS 16
@@ -197,9 +199,10 @@ void __init pci_mmcfg_init(void)
return;
if (!e820_all_mapped(pci_mmcfg_config[0].base_address,
- pci_mmcfg_config[0].base_address + MMCONFIG_APER_SIZE,
+ pci_mmcfg_config[0].base_address + MMCONFIG_APER_MIN,
E820_RESERVED)) {
- printk(KERN_ERR "PCI: BIOS Bug: MCFG area is not E820-reserved\n");
+ printk(KERN_ERR "PCI: BIOS Bug: MCFG area at %x is not E820-reserved\n",
+ pci_mmcfg_config[0].base_address);
printk(KERN_ERR "PCI: Not using MMCONFIG.\n");
return;
}
--- 2.6.17-rc6-64.orig/arch/x86_64/pci/mmconfig.c
+++ 2.6.17-rc6-64/arch/x86_64/pci/mmconfig.c
@@ -13,7 +13,10 @@
#include "pci.h"
-#define MMCONFIG_APER_SIZE (256*1024*1024)
+/* aperture is up to 256MB but BIOS may reserve less */
+#define MMCONFIG_APER_MIN (2 * 1024*1024)
+#define MMCONFIG_APER_MAX (256 * 1024*1024)
+
/* Verify the first 16 busses. We assume that systems with more busses
get MCFG right. */
#define MAX_CHECK_BUS 16
@@ -175,9 +178,10 @@ void __init pci_mmcfg_init(void)
return;
if (!e820_all_mapped(pci_mmcfg_config[0].base_address,
- pci_mmcfg_config[0].base_address + MMCONFIG_APER_SIZE,
+ pci_mmcfg_config[0].base_address + MMCONFIG_APER_MIN,
E820_RESERVED)) {
- printk(KERN_ERR "PCI: BIOS Bug: MCFG area is not E820-reserved\n");
+ printk(KERN_ERR "PCI: BIOS Bug: MCFG area at %x is not E820-reserved\n",
+ pci_mmcfg_config[0].base_address);
printk(KERN_ERR "PCI: Not using MMCONFIG.\n");
return;
}
@@ -190,7 +194,8 @@ void __init pci_mmcfg_init(void)
}
for (i = 0; i < pci_mmcfg_config_num; ++i) {
pci_mmcfg_virt[i].cfg = &pci_mmcfg_config[i];
- pci_mmcfg_virt[i].virt = ioremap_nocache(pci_mmcfg_config[i].base_address, MMCONFIG_APER_SIZE);
+ pci_mmcfg_virt[i].virt = ioremap_nocache(pci_mmcfg_config[i].base_address,
+ MMCONFIG_APER_MAX);
if (!pci_mmcfg_virt[i].virt) {
printk("PCI: Cannot map mmconfig aperture for segment %d\n",
pci_mmcfg_config[i].pci_segment_group_number);
--
Chuck
next reply other threads:[~2006-06-16 3:03 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-06-16 3:00 Chuck Ebbert [this message]
-- strict thread matches above, loose matches on Subject: below --
2006-06-15 12:20 2.6.17-rc6 does not boot on HP dc7600u - MCFG area is not E820-reserved Barry Scott
2006-06-15 14:35 ` Barry Scott
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