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[ARM] ignore high memory with VIPT aliasing caches

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VIPT aliasing caches have issues of their own which are not yet handled.
Usage of discard_old_kernel_data() in copypage-v6.c is not highmem ready,
kmap/fixmap stuff doesn't take account of cache colouring, etc.
If/when those issues are handled then this could be reverted.

Signed-off-by: Nicolas Pitre <nico@marvell.com>
This commit is contained in:
Nicolas Pitre 2008-11-04 00:48:42 -05:00
parent 3902a15e78
commit 3f973e2216
1 changed files with 5 additions and 0 deletions
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5
arch/arm/mm/mmu.c
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@ -18,6 +18,7 @@
#include <asm/cputype.h>
#include <asm/mach-types.h>
#include <asm/sections.h>
#include <asm/cachetype.h>
#include <asm/setup.h>
#include <asm/sizes.h>
#include <asm/tlb.h>
@ -678,6 +679,10 @@ static void __init sanity_check_meminfo(void)
if (meminfo.nr_banks >= NR_BANKS) {
printk(KERN_CRIT "NR_BANKS too low, "
"ignoring high memory\n");
} else if (cache_is_vipt_aliasing()) {
printk(KERN_CRIT "HIGHMEM is not yet supported "
"with VIPT aliasing cache, "
"ignoring high memory\n");
} else {
memmove(bank + 1, bank,
(meminfo.nr_banks - i) * sizeof(*bank));