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ARM: footbridge: fix VGA initialisation
commit43659222e7
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:cc22b4c185
("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>
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2 changed files with 3 additions and 2 deletions
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@ -15,6 +15,7 @@
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#include <linux/init.h>
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#include <linux/io.h>
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#include <linux/spinlock.h>
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#include <video/vga.h>
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#include <asm/pgtable.h>
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#include <asm/page.h>
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@ -198,6 +199,8 @@ void __init footbridge_map_io(void)
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*/
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if (footbridge_cfn_mode())
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iotable_init(ebsa285_host_io_desc, ARRAY_SIZE(ebsa285_host_io_desc));
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vga_base = PCIMEM_BASE;
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}
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void footbridge_restart(char mode, const char *cmd)
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@ -18,7 +18,6 @@
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#include <linux/irq.h>
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#include <linux/io.h>
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#include <linux/spinlock.h>
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#include <video/vga.h>
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#include <asm/irq.h>
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#include <asm/mach/pci.h>
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@ -298,7 +297,6 @@ void __init dc21285_preinit(void)
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int cfn_mode;
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pcibios_min_mem = 0x81000000;
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vga_base = PCIMEM_BASE;
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mem_size = (unsigned int)high_memory - PAGE_OFFSET;
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for (mem_mask = 0x00100000; mem_mask < 0x10000000; mem_mask <<= 1)
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