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arc: Update exception & interrupt handling for ARCv2

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Initially IVT for ARCv2 was simply copypasted from ARCompact
with some selected fixes so basic stuff works.

Now we update it with more ARCv2 specific vectors like
 * Software Interrupt
 * Division by zero
 * Data cache consistency error
 * Misaligned access

Also normal interrupts are now implemented properly and extened to
all possible 240 items.

Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
This commit is contained in:
Alexey Brodkin 2016-08-04 09:21:50 +03:00
parent ffffcd1594
commit 699c4e592b
3 changed files with 72 additions and 13 deletions
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31
arch/arc/cpu/arcv2/ivt.S
View file

@ -7,21 +7,26 @@
.section .ivt, "a",@progbits
.align 4
/* Critical system events */
.word _start /* 0 - 0x000 */
.word memory_error /* 1 - 0x008 */
.word instruction_error /* 2 - 0x010 */
.word _start /* 0x00 - Reset */
.word memory_error /* 0x01 - Memory Error */
.word instruction_error /* 0x02 - Instruction Error */
/* Exceptions */
.word EV_MachineCheck /* 0x100, Fatal Machine check (0x20) */
.word EV_TLBMissI /* 0x108, Intruction TLB miss (0x21) */
.word EV_TLBMissD /* 0x110, Data TLB miss (0x22) */
.word EV_TLBProtV /* 0x118, Protection Violation (0x23)
or Misaligned Access */
.word EV_PrivilegeV /* 0x120, Privilege Violation (0x24) */
.word EV_Trap /* 0x128, Trap exception (0x25) */
.word EV_Extension /* 0x130, Extn Intruction Excp (0x26) */
.word EV_MachineCheck /* 0x03 - Fatal Machine check */
.word EV_TLBMissI /* 0x04 - Intruction TLB miss */
.word EV_TLBMissD /* 0x05 - Data TLB miss */
.word EV_TLBProtV /* 0x06 - Protection Violation or Misaligned Access */
.word EV_PrivilegeV /* 0x07 - Privilege Violation */
.word EV_SWI /* 0x08 - Software Interrupt */
.word EV_Trap /* 0x09 - Trap */
.word EV_Extension /* 0x0A - Extension Intruction Exception */
.word EV_DivZero /* 0x0B - Division by Zero */
.word EV_DCError /* 0x0C - Data cache consistency error */
.word EV_Maligned /* 0x0D - Misaligned data access */
.word 0 /* 0x0E - Unused */
.word 0 /* 0x0F - Unused */
/* Device interrupts */
.rept 29
j interrupt_handler /* 3:31 - 0x018:0xF8 */
.rept 240
.word interrupt_handler /* 0x10 - 0xFF */
.endr

26
arch/arc/lib/interrupts.c
View file

@ -141,3 +141,29 @@ void do_extension(struct pt_regs *regs)
printf("Extension instruction exception\n");
bad_mode(regs);
}
#ifdef CONFIG_ISA_ARCV2
void do_swi(struct pt_regs *regs)
{
printf("Software Interrupt exception\n");
bad_mode(regs);
}
void do_divzero(unsigned long address, struct pt_regs *regs)
{
printf("Division by zero exception @ 0x%lx\n", address);
bad_mode(regs);
}
void do_dcerror(struct pt_regs *regs)
{
printf("Data cache consistency error exception\n");
bad_mode(regs);
}
void do_maligned(unsigned long address, struct pt_regs *regs)
{
printf("Misaligned data access exception @ 0x%lx\n", address);
bad_mode(regs);
}
#endif

28
arch/arc/lib/ints_low.S
View file

@ -149,3 +149,31 @@ ENTRY(EV_Extension)
mov %r0, %sp
j do_extension
ENDPROC(EV_Extension)
#ifdef CONFIG_ISA_ARCV2
ENTRY(EV_SWI)
SAVE_ALL_SYS
mov %r0, %sp
j do_swi
ENDPROC(EV_SWI)
ENTRY(EV_DivZero)
SAVE_ALL_SYS
SAVE_EXCEPTION_SOURCE
mov %r1, %sp
j do_divzero
ENDPROC(EV_DivZero)
ENTRY(EV_DCError)
SAVE_ALL_SYS
mov %r0, %sp
j do_dcerror
ENDPROC(EV_DCError)
ENTRY(EV_Maligned)
SAVE_ALL_SYS
SAVE_EXCEPTION_SOURCE
mov %r1, %sp
j do_maligned
ENDPROC(EV_Maligned)
#endif