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powerpc: Enforce usage of RA 0-R31 where possible 

Some macros use RA where when RA=R0 the values is 0, so make this
the enforced mnemonic in the macro.

Idea suggested by Andreas Schwab.

Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Michael Neuling 2012-06-25 13:33:25 +00:00 committed by Benjamin Herrenschmidt
parent f4c015795c
commit 962cffbd8a
5 changed files with 25 additions and 25 deletions
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14
arch/powerpc/include/asm/ppc-opcode.h
View File

@ -231,7 +231,7 @@
#define PPC_RFDI stringify_in_c(.long PPC_INST_RFDI)
#define PPC_RFMCI stringify_in_c(.long PPC_INST_RFMCI)
#define PPC_TLBILX(t, a, b) stringify_in_c(.long PPC_INST_TLBILX | \
__PPC_T_TLB(t) | __PPC_RA(a) | __PPC_RB(b))
__PPC_T_TLB(t) | __PPC_RA0(a) | __PPC_RB(b))
#define PPC_TLBILX_ALL(a, b) PPC_TLBILX(0, a, b)
#define PPC_TLBILX_PID(a, b) PPC_TLBILX(1, a, b)
#define PPC_TLBILX_VA(a, b) PPC_TLBILX(3, a, b)
@ -240,23 +240,23 @@
#define PPC_TLBIE(lp,a) stringify_in_c(.long PPC_INST_TLBIE | \
___PPC_RB(a) | ___PPC_RS(lp))
#define PPC_TLBSRX_DOT(a,b) stringify_in_c(.long PPC_INST_TLBSRX_DOT | \
__PPC_RA(a) | __PPC_RB(b))
__PPC_RA0(a) | __PPC_RB(b))
#define PPC_TLBIVAX(a,b) stringify_in_c(.long PPC_INST_TLBIVAX | \
__PPC_RA(a) | __PPC_RB(b))
__PPC_RA0(a) | __PPC_RB(b))
#define PPC_ERATWE(s, a, w) stringify_in_c(.long PPC_INST_ERATWE | \
__PPC_RS(s) | __PPC_RA(a) | __PPC_WS(w))
#define PPC_ERATRE(s, a, w) stringify_in_c(.long PPC_INST_ERATRE | \
__PPC_RS(s) | __PPC_RA(a) | __PPC_WS(w))
#define PPC_ERATILX(t, a, b) stringify_in_c(.long PPC_INST_ERATILX | \
__PPC_T_TLB(t) | __PPC_RA(a) | \
__PPC_T_TLB(t) | __PPC_RA0(a) | \
__PPC_RB(b))
#define PPC_ERATIVAX(s, a, b) stringify_in_c(.long PPC_INST_ERATIVAX | \
__PPC_RS(s) | __PPC_RA(a) | __PPC_RB(b))
__PPC_RS(s) | __PPC_RA0(a) | __PPC_RB(b))
#define PPC_ERATSX(t, a, w) stringify_in_c(.long PPC_INST_ERATSX | \
__PPC_RS(t) | __PPC_RA(a) | __PPC_RB(b))
__PPC_RS(t) | __PPC_RA0(a) | __PPC_RB(b))
#define PPC_ERATSX_DOT(t, a, w) stringify_in_c(.long PPC_INST_ERATSX_DOT | \
__PPC_RS(t) | __PPC_RA(a) | __PPC_RB(b))
__PPC_RS(t) | __PPC_RA0(a) | __PPC_RB(b))
#define PPC_SLBFEE_DOT(t, b) stringify_in_c(.long PPC_INST_SLBFEE | \
__PPC_RT(t) | __PPC_RB(b))
/* PASemi instructions */

2
arch/powerpc/kernel/cpu_setup_a2.S
View File

@ -112,7 +112,7 @@ _icswx_skip_guest:
* a bolted entry though it will be in LRU and so will go away eventually
* but let's not bother for now
*/
PPC_ERATILX(0,R0,R0)
PPC_ERATILX(0,0,R0)
1:
blr

8
arch/powerpc/kernel/exceptions-64e.S
View File

@ -903,7 +903,7 @@ skpinv: addi r6,r6,1 /* Increment */
bne 1b /* If not, repeat */
/* Invalidate all TLBs */
PPC_TLBILX_ALL(R0,R0)
PPC_TLBILX_ALL(0,R0)
sync
isync
@ -961,7 +961,7 @@ skpinv: addi r6,r6,1 /* Increment */
tlbwe
/* Invalidate TLB1 */
PPC_TLBILX_ALL(R0,R0)
PPC_TLBILX_ALL(0,R0)
sync
isync
@ -1020,7 +1020,7 @@ skpinv: addi r6,r6,1 /* Increment */
tlbwe
/* Invalidate TLB1 */
PPC_TLBILX_ALL(R0,R0)
PPC_TLBILX_ALL(0,R0)
sync
isync
@ -1138,7 +1138,7 @@ a2_tlbinit_after_iprot_flush:
tlbwe
#endif /* CONFIG_PPC_EARLY_DEBUG_WSP */
PPC_TLBILX(0,R0,R0)
PPC_TLBILX(0,0,R0)
sync
isync

10
arch/powerpc/mm/tlb_low_64e.S
View File

@ -126,7 +126,7 @@ BEGIN_MMU_FTR_SECTION
/* Set the TLB reservation and search for existing entry. Then load
* the entry.
*/
PPC_TLBSRX_DOT(R0,R16)
PPC_TLBSRX_DOT(0,R16)
ldx r14,r14,r15 /* grab pgd entry */
beq normal_tlb_miss_done /* tlb exists already, bail */
MMU_FTR_SECTION_ELSE
@ -395,7 +395,7 @@ BEGIN_MMU_FTR_SECTION
/* Set the TLB reservation and search for existing entry. Then load
* the entry.
*/
PPC_TLBSRX_DOT(R0,R16)
PPC_TLBSRX_DOT(0,R16)
ld r14,0(r10)
beq normal_tlb_miss_done
MMU_FTR_SECTION_ELSE
@ -528,7 +528,7 @@ BEGIN_MMU_FTR_SECTION
/* Search if we already have a TLB entry for that virtual address, and
* if we do, bail out.
*/
PPC_TLBSRX_DOT(R0,R16)
PPC_TLBSRX_DOT(0,R16)
beq virt_page_table_tlb_miss_done
END_MMU_FTR_SECTION_IFSET(MMU_FTR_USE_TLBRSRV)
@ -779,7 +779,7 @@ htw_tlb_miss:
*
* MAS1:IND should be already set based on MAS4
*/
PPC_TLBSRX_DOT(R0,R16)
PPC_TLBSRX_DOT(0,R16)
beq htw_tlb_miss_done
/* Now, we need to walk the page tables. First check if we are in
@ -919,7 +919,7 @@ tlb_load_linear:
mtspr SPRN_MAS1,r15
/* Already somebody there ? */
PPC_TLBSRX_DOT(R0,R16)
PPC_TLBSRX_DOT(0,R16)
beq tlb_load_linear_done
/* Now we build the remaining MAS. MAS0 and 2 should be fine

16
arch/powerpc/mm/tlb_nohash_low.S
View File

@ -266,7 +266,7 @@ BEGIN_MMU_FTR_SECTION
andi. r3,r3,MMUCSR0_TLBFI@l
bne 1b
MMU_FTR_SECTION_ELSE
PPC_TLBILX_ALL(R0,R0)
PPC_TLBILX_ALL(0,R0)
ALT_MMU_FTR_SECTION_END_IFCLR(MMU_FTR_USE_TLBILX)
msync
isync
@ -279,7 +279,7 @@ BEGIN_MMU_FTR_SECTION
wrteei 0
mfspr r4,SPRN_MAS6 /* save MAS6 */
mtspr SPRN_MAS6,r3
PPC_TLBILX_PID(R0,R0)
PPC_TLBILX_PID(0,R0)
mtspr SPRN_MAS6,r4 /* restore MAS6 */
wrtee r10
MMU_FTR_SECTION_ELSE
@ -313,7 +313,7 @@ BEGIN_MMU_FTR_SECTION
mtspr SPRN_MAS1,r4
tlbwe
MMU_FTR_SECTION_ELSE
PPC_TLBILX_VA(R0,R3)
PPC_TLBILX_VA(0,R3)
ALT_MMU_FTR_SECTION_END_IFCLR(MMU_FTR_USE_TLBILX)
msync
isync
@ -331,7 +331,7 @@ _GLOBAL(_tlbil_pid)
mfmsr r10
wrteei 0
mtspr SPRN_MAS6,r4
PPC_TLBILX_PID(R0,R0)
PPC_TLBILX_PID(0,R0)
wrtee r10
msync
isync
@ -343,14 +343,14 @@ _GLOBAL(_tlbil_pid_noind)
ori r4,r4,MAS6_SIND
wrteei 0
mtspr SPRN_MAS6,r4
PPC_TLBILX_PID(R0,R0)
PPC_TLBILX_PID(0,R0)
wrtee r10
msync
isync
blr
_GLOBAL(_tlbil_all)
PPC_TLBILX_ALL(R0,R0)
PPC_TLBILX_ALL(0,R0)
msync
isync
blr
@ -364,7 +364,7 @@ _GLOBAL(_tlbil_va)
beq 1f
rlwimi r4,r6,MAS6_SIND_SHIFT,MAS6_SIND
1: mtspr SPRN_MAS6,r4 /* assume AS=0 for now */
PPC_TLBILX_VA(R0,R3)
PPC_TLBILX_VA(0,R3)
msync
isync
wrtee r10
@ -379,7 +379,7 @@ _GLOBAL(_tlbivax_bcast)
beq 1f
rlwimi r4,r6,MAS6_SIND_SHIFT,MAS6_SIND
1: mtspr SPRN_MAS6,r4 /* assume AS=0 for now */
PPC_TLBIVAX(R0,R3)
PPC_TLBIVAX(0,R3)
eieio
tlbsync
sync