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microblaze: Fix compilation error for BS=0 

This bug was introduced by:
"microblaze: Do not used hardcoded value in exception handler"
(sha1: 9f78d3b5ab)

System without barrel shifter are pretty rare that's why
this bug has been fixed so late.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
hifive-unleashed-5.1
Michal Simek 2013-11-19 16:20:34 +01:00
parent 34b9c07a3b
commit 52ade599e3
1 changed files with 37 additions and 12 deletions
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49
arch/microblaze/kernel/hw_exception_handler.S
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@ -147,15 +147,14 @@
or r3, r0, NUM_TO_REG (regnum);
/* Shift right instruction depending on available configuration */
#if CONFIG_XILINX_MICROBLAZE0_USE_BARREL > 0
#define BSRLI(rD, rA, imm) \
bsrli rD, rA, imm
#else
#define BSRLI(rD, rA, imm) BSRLI ## imm (rD, rA)
#if CONFIG_XILINX_MICROBLAZE0_USE_BARREL == 0
/* Only the used shift constants defined here - add more if needed */
#define BSRLI2(rD, rA) \
srl rD, rA; /* << 1 */ \
srl rD, rD; /* << 2 */
#define BSRLI4(rD, rA) \
BSRLI2(rD, rA); \
BSRLI2(rD, rD)
#define BSRLI10(rD, rA) \
srl rD, rA; /* << 1 */ \
srl rD, rD; /* << 2 */ \
@ -170,7 +169,33 @@
#define BSRLI20(rD, rA) \
BSRLI10(rD, rA); \
BSRLI10(rD, rD)
.macro bsrli, rD, rA, IMM
.if (\IMM) == 2
BSRLI2(\rD, \rA)
.elseif (\IMM) == 10
BSRLI10(\rD, \rA)
.elseif (\IMM) == 12
BSRLI2(\rD, \rA)
BSRLI10(\rD, \rD)
.elseif (\IMM) == 14
BSRLI4(\rD, \rA)
BSRLI10(\rD, \rD)
.elseif (\IMM) == 20
BSRLI20(\rD, \rA)
.elseif (\IMM) == 24
BSRLI4(\rD, \rA)
BSRLI20(\rD, \rD)
.elseif (\IMM) == 28
BSRLI4(\rD, \rA)
BSRLI4(\rD, \rD)
BSRLI20(\rD, \rD)
.else
.error "BSRLI shift macros \IMM"
.endif
.endm
#endif
#endif /* CONFIG_MMU */
.extern other_exception_handler /* Defined in exception.c */
@ -604,7 +629,7 @@ ex_handler_done:
ex4:
tophys(r4,r4)
/* Create L1 (pgdir/pmd) address */
BSRLI(r5,r3, PGDIR_SHIFT - 2)
bsrli r5, r3, PGDIR_SHIFT - 2
andi r5, r5, PAGE_SIZE - 4
/* Assume pgdir aligned on 4K boundary, no need for "andi r4,r4,0xfffff003" */
or r4, r4, r5
@ -613,7 +638,7 @@ ex_handler_done:
beqi r5, ex2 /* Bail if no table */
tophys(r5,r5)
BSRLI(r6,r3,PTE_SHIFT) /* Compute PTE address */
bsrli r6, r3, PTE_SHIFT /* Compute PTE address */
andi r6, r6, PAGE_SIZE - 4
or r5, r5, r6
lwi r4, r5, 0 /* Get Linux PTE */
@ -705,7 +730,7 @@ ex_handler_done:
ex6:
tophys(r4,r4)
/* Create L1 (pgdir/pmd) address */
BSRLI(r5,r3, PGDIR_SHIFT - 2)
bsrli r5, r3, PGDIR_SHIFT - 2
andi r5, r5, PAGE_SIZE - 4
/* Assume pgdir aligned on 4K boundary, no need for "andi r4,r4,0xfffff003" */
or r4, r4, r5
@ -714,7 +739,7 @@ ex_handler_done:
beqi r5, ex7 /* Bail if no table */
tophys(r5,r5)
BSRLI(r6,r3,PTE_SHIFT) /* Compute PTE address */
bsrli r6, r3, PTE_SHIFT /* Compute PTE address */
andi r6, r6, PAGE_SIZE - 4
or r5, r5, r6
lwi r4, r5, 0 /* Get Linux PTE */
@ -776,7 +801,7 @@ ex_handler_done:
ex9:
tophys(r4,r4)
/* Create L1 (pgdir/pmd) address */
BSRLI(r5,r3, PGDIR_SHIFT - 2)
bsrli r5, r3, PGDIR_SHIFT - 2
andi r5, r5, PAGE_SIZE - 4
/* Assume pgdir aligned on 4K boundary, no need for "andi r4,r4,0xfffff003" */
or r4, r4, r5
@ -785,7 +810,7 @@ ex_handler_done:
beqi r5, ex10 /* Bail if no table */
tophys(r5,r5)
BSRLI(r6,r3,PTE_SHIFT) /* Compute PTE address */
bsrli r6, r3, PTE_SHIFT /* Compute PTE address */
andi r6, r6, PAGE_SIZE - 4
or r5, r5, r6
lwi r4, r5, 0 /* Get Linux PTE */
@ -922,7 +947,7 @@ ex_handler_done:
.ent _unaligned_data_exception
_unaligned_data_exception:
andi r8, r3, 0x3E0; /* Mask and extract the register operand */
BSRLI(r8,r8,2); /* r8 >> 2 = register operand * 8 */
bsrli r8, r8, 2; /* r8 >> 2 = register operand * 8 */
andi r6, r3, 0x400; /* Extract ESR[S] */
bneid r6, ex_sw_vm;
andi r6, r3, 0x800; /* Extract ESR[W] - delay slot */