parisc: allow to build with 16k default kernel page size
Introduce new convert_for_tlb_insert20 macro and use it to replace assembler statements with hardcoded constants. This change allows the parisc64 kernel to boot with 16kb default kernel page size, aka CONFIG_PARISC_PAGE_SIZE_16KB=y. Signed-off-by: Helge Deller <deller@gmx.de> Signed-off-by: Kyle McMartin <kyle@mcmartin.ca>
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1 changed files with 17 additions and 8 deletions
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@ -505,6 +505,18 @@
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STREG \pte,0(\ptep)
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.endm
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/* bitshift difference between a PFN (based on kernel's PAGE_SIZE)
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* to a CPU TLB 4k PFN (4k => 12 bits to shift) */
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#define PAGE_ADD_SHIFT (PAGE_SHIFT-12)
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/* Drop prot bits and convert to page addr for iitlbt and idtlbt */
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.macro convert_for_tlb_insert20 pte
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extrd,u \pte,(63-ASM_PFN_PTE_SHIFT)+(63-58)+PAGE_ADD_SHIFT,\
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64-PAGE_SHIFT-PAGE_ADD_SHIFT,\pte
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depdi _PAGE_SIZE_ENCODING_DEFAULT,63,\
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(63-58)+PAGE_ADD_SHIFT,\pte
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.endm
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/* Convert the pte and prot to tlb insertion values. How
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* this happens is quite subtle, read below */
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.macro make_insert_tlb spc,pte,prot
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@ -544,8 +556,7 @@
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depi 1,12,1,\prot
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/* Drop prot bits and convert to page addr for iitlbt and idtlbt */
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extrd,u \pte,(63-ASM_PFN_PTE_SHIFT)+(63-58),64-PAGE_SHIFT,\pte
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depdi _PAGE_SIZE_ENCODING_DEFAULT,63,63-58,\pte
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convert_for_tlb_insert20 \pte
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.endm
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/* Identical macro to make_insert_tlb above, except it
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@ -1244,10 +1255,9 @@ nadtlb_check_flush_20w:
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depdi,z 7,7,3,prot
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depdi 1,10,1,prot
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/* Get rid of prot bits and convert to page addr for idtlbt */
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/* Drop prot bits from pte and convert to page addr for idtlbt */
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convert_for_tlb_insert20 pte
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depdi 0,63,12,pte
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extrd,u pte,56,52,pte
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idtlbt pte,prot
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rfir
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@ -1403,10 +1413,9 @@ nadtlb_check_flush_20:
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depdi,z 7,7,3,prot
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depdi 1,10,1,prot
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/* Get rid of prot bits and convert to page addr for idtlbt */
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/* Drop prot bits from pte and convert to page addr for idtlbt */
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convert_for_tlb_insert20 pte
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depdi 0,63,12,pte
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extrd,u pte,56,32,pte
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idtlbt pte,prot
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rfir
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