From: Darren Stevens <darren@stevens-zone.net>
To: linuxppc-dev@lists.ozlabs.org
Cc: Christian Zigotzky <chzigotzky@xenosoft.de>,
matthew@a-eon.com, Pat Wall <pjwall@mac.com>,
R.T.Dickinson <rtd2@xtra.co.nz>,
aperez@alexperez.com
Subject: Proposed: Patch to fix boot on PA6T
Date: Sun, 26 Jun 2016 18:42:11 +0100 (BST) [thread overview]
Message-ID: <4863e2f8235.599ebfcf@auth.smtp.1and1.co.uk> (raw)
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AmigaOS...........: http://yam.ch/
Unix/MacOS/Windows: http://www.mozilla.com/thunderbird/
General information about MIME can be found at:
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Hello All,
commit d6a9996e84ac4beb7713e9485f4563e100a9b03e
powerpc/mm: vmalloc abstraction in preparation for radix
This commit introduced variables for some linux kernel addresses that had
before
been constants, unfortunately this stopped PaSemi PA6T systems(*) from
booting as
they call ioremap to map SoC registers before the mmu is initialised. The
attached
patch adds a hard-coded init of pci_io_base to the pas_init_early()
function which
which allows the kernel to boot normally.
The value will be harmlessly set again once pci starts up.
(*) At the moment this has only been tested on an AmigaOneX1000, but I
expect PaSemi
reference systems to have been affected in the same way.
Kind regards
Darren
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diff --git a/arch/powerpc/platforms/pasemi/setup.c b/arch/powerpc/platforms/pasemi/setup.c
index d71b2c7..6b8d2ab 100644
--- a/arch/powerpc/platforms/pasemi/setup.c
+++ b/arch/powerpc/platforms/pasemi/setup.c
@@ -61,6 +61,7 @@ static struct mce_regs mce_regs[MAX_MCE_REGS];
static int num_mce_regs;
static int nmi_virq = NO_IRQ;
+extern unsigned long pci_io_base;
static void pas_restart(char *cmd)
{
@@ -341,6 +342,10 @@ out:
static void __init pas_init_early(void)
{
+ /* Initialise the IO pointer so we don't crash on boot */
+
+ pci_io_base = (H_KERN_VIRT_START + (H_KERN_VIRT_SIZE >> 1));
+
iommu_init_early_pasemi();
}
next reply other threads:[~2016-06-26 18:44 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-26 17:42 Darren Stevens [this message]
2016-06-26 20:08 ` Proposed: Patch to fix boot on PA6T Christian Zigotzky
2016-06-26 22:50 ` Benjamin Herrenschmidt
2016-06-29 19:52 ` Darren Stevens
2016-06-28 10:51 ` Michael Ellerman
2016-06-29 19:54 ` Darren Stevens
2016-06-28 14:18 ` Aneesh Kumar K.V
2016-06-29 19:56 ` Darren Stevens
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