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powerpc/mm: Increase the slice range to 64TB

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This patch makes the high psizes mask as an unsigned char array
so that we can have more than 16TB. Currently we support upto
64TB

Reviewed-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Aneesh Kumar K.V
2012-09-10 02:52:52 +00:00
committed by Benjamin Herrenschmidt
parent 67550080b8
commit 7aa0727f33
5 changed files with 109 additions and 55 deletions
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arch/powerpc/mm/hash_utils_64.c
+9 -6
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@@ -803,16 +803,19 @@ unsigned int hash_page_do_lazy_icache(unsigned int pp, pte_t pte, int trap)
#ifdef CONFIG_PPC_MM_SLICES
unsigned int get_paca_psize(unsigned long addr)
{
unsigned long index, slices;
u64 lpsizes;
unsigned char *hpsizes;
unsigned long index, mask_index;
if (addr < SLICE_LOW_TOP) {
slices = get_paca()->context.low_slices_psize;
lpsizes = get_paca()->context.low_slices_psize;
index = GET_LOW_SLICE_INDEX(addr);
} else {
slices = get_paca()->context.high_slices_psize;
index = GET_HIGH_SLICE_INDEX(addr);
return (lpsizes >> (index * 4)) & 0xF;
}
return (slices >> (index * 4)) & 0xF;
hpsizes = get_paca()->context.high_slices_psize;
index = GET_HIGH_SLICE_INDEX(addr);
mask_index = index & 0x1;
return (hpsizes[index >> 1] >> (mask_index * 4)) & 0xF;
}
#else