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powerpc/40x: Split and rename NORMAL_EXCEPTION_PROLOG 

This patch splits NORMAL_EXCEPTION_PROLOG in the same way as in
head_8xx.S and head_32.S and renames it EXCEPTION_PROLOG() as well
to match head_32.h

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Christophe Leroy 2019-04-30 12:38:55 +00:00 committed by Michael Ellerman
parent bd82904d46
commit 7271fc9604
1 changed files with 16 additions and 10 deletions
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26
arch/powerpc/kernel/head_40x.S
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@ -103,10 +103,14 @@ _ENTRY(saved_ksp_limit)
* turned off (i.e. using physical addresses). We assume SPRG_THREAD has
* the physical address of the current task thread_struct.
*/
#define NORMAL_EXCEPTION_PROLOG \
#define EXCEPTION_PROLOG \
mtspr SPRN_SPRG_SCRATCH0,r10; /* save two registers to work with */\
mtspr SPRN_SPRG_SCRATCH1,r11; \
mfcr r10; /* save CR in r10 for now */\
EXCEPTION_PROLOG_1; \
EXCEPTION_PROLOG_2
#define EXCEPTION_PROLOG_1 \
mfspr r11,SPRN_SRR1; /* check whether user or kernel */\
andi. r11,r11,MSR_PR; \
tophys(r11,r1); \
@ -115,7 +119,9 @@ _ENTRY(saved_ksp_limit)
lwz r11,TASK_STACK-THREAD(r11); /* this thread's kernel stack */\
addi r11,r11,THREAD_SIZE; \
tophys(r11,r11); \
1: subi r11,r11,INT_FRAME_SIZE; /* Allocate an exception frame */\
1: subi r11,r11,INT_FRAME_SIZE /* Allocate an exception frame */
#define EXCEPTION_PROLOG_2 \
stw r10,_CCR(r11); /* save various registers */\
stw r12,GPR12(r11); \
stw r9,GPR9(r11); \
@ -205,7 +211,7 @@ label:
#define EXCEPTION(n, label, hdlr, xfer) \
START_EXCEPTION(n, label); \
NORMAL_EXCEPTION_PROLOG; \
EXCEPTION_PROLOG; \
addi r3,r1,STACK_FRAME_OVERHEAD; \
xfer(n, hdlr)
@ -396,7 +402,7 @@ label:
* This is caused by a fetch from non-execute or guarded pages.
*/
START_EXCEPTION(0x0400, InstructionAccess)
NORMAL_EXCEPTION_PROLOG
EXCEPTION_PROLOG
mr r4,r12 /* Pass SRR0 as arg2 */
li r5,0 /* Pass zero as arg3 */
EXC_XFER_LITE(0x400, handle_page_fault)
@ -406,7 +412,7 @@ label:
/* 0x0600 - Alignment Exception */
START_EXCEPTION(0x0600, Alignment)
NORMAL_EXCEPTION_PROLOG
EXCEPTION_PROLOG
mfspr r4,SPRN_DEAR /* Grab the DEAR and save it */
stw r4,_DEAR(r11)
addi r3,r1,STACK_FRAME_OVERHEAD
@ -414,7 +420,7 @@ label:
/* 0x0700 - Program Exception */
START_EXCEPTION(0x0700, ProgramCheck)
NORMAL_EXCEPTION_PROLOG
EXCEPTION_PROLOG
mfspr r4,SPRN_ESR /* Grab the ESR and save it */
stw r4,_ESR(r11)
addi r3,r1,STACK_FRAME_OVERHEAD
@ -427,7 +433,7 @@ label:
/* 0x0C00 - System Call Exception */
START_EXCEPTION(0x0C00, SystemCall)
NORMAL_EXCEPTION_PROLOG
EXCEPTION_PROLOG
EXC_XFER_EE_LITE(0xc00, DoSyscall)
EXCEPTION(0x0D00, Trap_0D, unknown_exception, EXC_XFER_EE)
@ -733,7 +739,7 @@ label:
/* Programmable Interval Timer (PIT) Exception. (from 0x1000) */
Decrementer:
NORMAL_EXCEPTION_PROLOG
EXCEPTION_PROLOG
lis r0,TSR_PIS@h
mtspr SPRN_TSR,r0 /* Clear the PIT exception */
addi r3,r1,STACK_FRAME_OVERHEAD
@ -741,7 +747,7 @@ Decrementer:
/* Fixed Interval Timer (FIT) Exception. (from 0x1010) */
FITException:
NORMAL_EXCEPTION_PROLOG
EXCEPTION_PROLOG
addi r3,r1,STACK_FRAME_OVERHEAD;
EXC_XFER_EE(0x1010, unknown_exception)
@ -759,7 +765,7 @@ WDTException:
* if they can't resolve the lightweight TLB fault.
*/
DataAccess:
NORMAL_EXCEPTION_PROLOG
EXCEPTION_PROLOG
mfspr r5,SPRN_ESR /* Grab the ESR, save it, pass arg3 */
stw r5,_ESR(r11)
mfspr r4,SPRN_DEAR /* Grab the DEAR, save it, pass arg2 */