diff mbox series

[v3,10/15] powerpc/8xx: drop exception entries for non-existing exceptions

Message ID afee0f68dbfa72785457fd13f15f6fd5e249264d.1568106758.git.christophe.leroy@c-s.fr (mailing list archive)
State Changes Requested
Headers show
Series Enable CONFIG_VMAP_STACK on PPC32 | expand

Checks

Context Check Description
snowpatch_ozlabs/apply_patch success Successfully applied on branch next (c317052c95bef1f977b023158e5aa929215f443d)
snowpatch_ozlabs/checkpatch success total: 0 errors, 0 warnings, 0 checks, 56 lines checked

Commit Message

Christophe Leroy Sept. 10, 2019, 9:16 a.m. UTC 
head_8xx.S has entries for all exceptions from 0x100 to 0x1f00.
Several of them do not exist and are never generated by the 8xx
in accordance with the documentation.

Remove those entry points to make some room for future growing
exception code.

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
---
 arch/powerpc/kernel/head_8xx.S | 29 -----------------------------
 1 file changed, 29 deletions(-)
diff mbox series

Patch

diff --git a/arch/powerpc/kernel/head_8xx.S b/arch/powerpc/kernel/head_8xx.S
index 3de9c5f1746c..5aa63693f790 100644
--- a/arch/powerpc/kernel/head_8xx.S
+++ b/arch/powerpc/kernel/head_8xx.S
@@ -134,18 +134,6 @@  MachineCheck:
 	addi r3,r1,STACK_FRAME_OVERHEAD
 	EXC_XFER_STD(0x200, machine_check_exception)
 
-/* Data access exception.
- * This is "never generated" by the MPC8xx.
- */
-	. = 0x300
-DataAccess:
-
-/* Instruction access exception.
- * This is "never generated" by the MPC8xx.
- */
-	. = 0x400
-InstructionAccess:
-
 /* External interrupt */
 	EXCEPTION(0x500, HardwareInterrupt, do_IRQ, EXC_XFER_LITE)
 
@@ -162,16 +150,9 @@  Alignment:
 /* Program check exception */
 	EXCEPTION(0x700, ProgramCheck, program_check_exception, EXC_XFER_STD)
 
-/* No FPU on MPC8xx.  This exception is not supposed to happen.
-*/
-	EXCEPTION(0x800, FPUnavailable, unknown_exception, EXC_XFER_STD)
-
 /* Decrementer */
 	EXCEPTION(0x900, Decrementer, timer_interrupt, EXC_XFER_LITE)
 
-	EXCEPTION(0xa00, Trap_0a, unknown_exception, EXC_XFER_STD)
-	EXCEPTION(0xb00, Trap_0b, unknown_exception, EXC_XFER_STD)
-
 /* System call */
 	. = 0xc00
 SystemCall:
@@ -179,8 +160,6 @@  SystemCall:
 
 /* Single step - not used on 601 */
 	EXCEPTION(0xd00, SingleStep, single_step_exception, EXC_XFER_STD)
-	EXCEPTION(0xe00, Trap_0e, unknown_exception, EXC_XFER_STD)
-	EXCEPTION(0xf00, Trap_0f, unknown_exception, EXC_XFER_STD)
 
 /* On the MPC8xx, this is a software emulation interrupt.  It occurs
  * for all unimplemented and illegal instructions.
@@ -507,14 +486,6 @@  DARFixed:/* Return from dcbx instruction bug workaround */
 	/* 0x300 is DataAccess exception, needed by bad_page_fault() */
 	EXC_XFER_LITE(0x300, handle_page_fault)
 
-	EXCEPTION(0x1500, Trap_15, unknown_exception, EXC_XFER_STD)
-	EXCEPTION(0x1600, Trap_16, unknown_exception, EXC_XFER_STD)
-	EXCEPTION(0x1700, Trap_17, unknown_exception, EXC_XFER_STD)
-	EXCEPTION(0x1800, Trap_18, unknown_exception, EXC_XFER_STD)
-	EXCEPTION(0x1900, Trap_19, unknown_exception, EXC_XFER_STD)
-	EXCEPTION(0x1a00, Trap_1a, unknown_exception, EXC_XFER_STD)
-	EXCEPTION(0x1b00, Trap_1b, unknown_exception, EXC_XFER_STD)
-
 /* On the MPC8xx, these next four traps are used for development
  * support of breakpoints and such.  Someday I will get around to
  * using them.