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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>
This commit is contained in:
Helge Deller 2009-02-05 00:06:00 +01:00 committed by Kyle McMartin
parent 445c088f88
commit afca252387
1 changed files with 17 additions and 8 deletions
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25
arch/parisc/kernel/entry.S
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@ -505,6 +505,18 @@
STREG \pte,0(\ptep)
.endm
/* bitshift difference between a PFN (based on kernel's PAGE_SIZE)
* to a CPU TLB 4k PFN (4k => 12 bits to shift) */
#define PAGE_ADD_SHIFT (PAGE_SHIFT-12)
/* Drop prot bits and convert to page addr for iitlbt and idtlbt */
.macro convert_for_tlb_insert20 pte
extrd,u \pte,(63-ASM_PFN_PTE_SHIFT)+(63-58)+PAGE_ADD_SHIFT,\
64-PAGE_SHIFT-PAGE_ADD_SHIFT,\pte
depdi _PAGE_SIZE_ENCODING_DEFAULT,63,\
(63-58)+PAGE_ADD_SHIFT,\pte
.endm
/* Convert the pte and prot to tlb insertion values. How
* this happens is quite subtle, read below */
.macro make_insert_tlb spc,pte,prot
@ -544,8 +556,7 @@
depi 1,12,1,\prot
/* Drop prot bits and convert to page addr for iitlbt and idtlbt */
extrd,u \pte,(63-ASM_PFN_PTE_SHIFT)+(63-58),64-PAGE_SHIFT,\pte
depdi _PAGE_SIZE_ENCODING_DEFAULT,63,63-58,\pte
convert_for_tlb_insert20 \pte
.endm
/* Identical macro to make_insert_tlb above, except it
@ -1244,10 +1255,9 @@ nadtlb_check_flush_20w:
depdi,z 7,7,3,prot
depdi 1,10,1,prot
/* Get rid of prot bits and convert to page addr for idtlbt */
/* Drop prot bits from pte and convert to page addr for idtlbt */
convert_for_tlb_insert20 pte
depdi 0,63,12,pte
extrd,u pte,56,52,pte
idtlbt pte,prot
rfir
@ -1403,10 +1413,9 @@ nadtlb_check_flush_20:
depdi,z 7,7,3,prot
depdi 1,10,1,prot
/* Get rid of prot bits and convert to page addr for idtlbt */
/* Drop prot bits from pte and convert to page addr for idtlbt */
convert_for_tlb_insert20 pte
depdi 0,63,12,pte
extrd,u pte,56,32,pte
idtlbt pte,prot
rfir