diff options
| author | Russell King <rmk+kernel@arm.linux.org.uk> | 2013-11-28 21:55:41 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-04-14 06:44:20 -0700 |
| commit | 0045ba111325a68bf287b68956e9716cc797f4fd (patch) | |
| tree | 8d2eb0c133299e1a717bcc8a34410f1c976ea9bd /arch/arm | |
| parent | cbac9bda67f107ec39383d936380ffe9f5f67cdc (diff) | |
| download | lwn-0045ba111325a68bf287b68956e9716cc797f4fd.tar.gz lwn-0045ba111325a68bf287b68956e9716cc797f4fd.zip | |
ARM: footbridge: fix VGA initialisation
commit 43659222e7a0113912ed02f6b2231550b3e471ac upstream.
It's no good setting vga_base after the VGA console has been
initialised, because if we do that we get this:
Unable to handle kernel paging request at virtual address 000b8000
pgd = c0004000
[000b8000] *pgd=07ffc831, *pte=00000000, *ppte=00000000
0Internal error: Oops: 5017 [#1] ARM
Modules linked in:
CPU: 0 PID: 0 Comm: swapper Not tainted 3.12.0+ #49
task: c03e2974 ti: c03d8000 task.ti: c03d8000
PC is at vgacon_startup+0x258/0x39c
LR is at request_resource+0x10/0x1c
pc : [<c01725d0>] lr : [<c0022b50>] psr: 60000053
sp : c03d9f68 ip : 000b8000 fp : c03d9f8c
r10: 000055aa r9 : 4401a103 r8 : ffffaa55
r7 : c03e357c r6 : c051b460 r5 : 000000ff r4 : 000c0000
r3 : 000b8000 r2 : c03e0514 r1 : 00000000 r0 : c0304971
Flags: nZCv IRQs on FIQs off Mode SVC_32 ISA ARM Segment kernel
which is an access to the 0xb8000 without the PCI offset required to
make it work.
Fixes: cc22b4c18540 ("ARM: set vga memory base at run-time")
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Cc: Yang Yingliang <yangyingliang@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/mach-footbridge/common.c | 3 | ||||
| -rw-r--r-- | arch/arm/mach-footbridge/dc21285.c | 2 |
2 files changed, 3 insertions, 2 deletions
diff --git a/arch/arm/mach-footbridge/common.c b/arch/arm/mach-footbridge/common.c index 3e6aaa6361da..909e866a6872 100644 --- a/arch/arm/mach-footbridge/common.c +++ b/arch/arm/mach-footbridge/common.c @@ -15,6 +15,7 @@ #include <linux/init.h> #include <linux/io.h> #include <linux/spinlock.h> +#include <video/vga.h> #include <asm/pgtable.h> #include <asm/page.h> @@ -198,6 +199,8 @@ void __init footbridge_map_io(void) */ if (footbridge_cfn_mode()) iotable_init(ebsa285_host_io_desc, ARRAY_SIZE(ebsa285_host_io_desc)); + + vga_base = PCIMEM_BASE; } void footbridge_restart(char mode, const char *cmd) diff --git a/arch/arm/mach-footbridge/dc21285.c b/arch/arm/mach-footbridge/dc21285.c index e17e11de4f5e..cdc82ae920be 100644 --- a/arch/arm/mach-footbridge/dc21285.c +++ b/arch/arm/mach-footbridge/dc21285.c @@ -18,7 +18,6 @@ #include <linux/irq.h> #include <linux/io.h> #include <linux/spinlock.h> -#include <video/vga.h> #include <asm/irq.h> #include <asm/mach/pci.h> @@ -298,7 +297,6 @@ void __init dc21285_preinit(void) int cfn_mode; pcibios_min_mem = 0x81000000; - vga_base = PCIMEM_BASE; mem_size = (unsigned int)high_memory - PAGE_OFFSET; for (mem_mask = 0x00100000; mem_mask < 0x10000000; mem_mask <<= 1) |