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authorKyle McMartin <kyle@mcmartin.ca>2007-10-18 00:04:56 -0700
committerKyle McMartin <kyle@shortfin.cabal.ca>2007-10-18 00:59:31 -0700
commit6cc4525d29e22ab831387b6fac371e0118693a25 (patch)
tree7a748cfdcaf540e31682ed6c50dbdfc6f18bc42b /arch/parisc/kernel/entry.S
parent873d50e2e56741406ff9d68c275f0c560e896a80 (diff)
[PARISC] Kill off broken irqstack code
It's been unfinished and broken long enough, and I have some ideas on how to do it more cleanly. Signed-off-by: Kyle McMartin <kyle@mcmartin.ca>
Diffstat (limited to 'arch/parisc/kernel/entry.S')
-rw-r--r--arch/parisc/kernel/entry.S37
1 files changed, 3 insertions, 34 deletions
diff --git a/arch/parisc/kernel/entry.S b/arch/parisc/kernel/entry.S
index f324939bb9a..111d47284ea 100644
--- a/arch/parisc/kernel/entry.S
+++ b/arch/parisc/kernel/entry.S
@@ -98,7 +98,6 @@
* The "get_stack" macros are responsible for determining the
* kernel stack value.
*
- * For Faults:
* If sr7 == 0
* Already using a kernel stack, so call the
* get_stack_use_r30 macro to push a pt_regs structure
@@ -110,26 +109,6 @@
* task pointer pointed to by cr30. Set the stack
* pointer to point to the end of the task structure.
*
- * For Interrupts:
- * If sr7 == 0
- * Already using a kernel stack, check to see if r30
- * is already pointing to the per processor interrupt
- * stack. If it is, call the get_stack_use_r30 macro
- * to push a pt_regs structure on the stack, and store
- * registers there. Otherwise, call get_stack_use_cr31
- * to get a pointer to the base of the interrupt stack
- * and push a pt_regs structure on that stack.
- * else
- * Need to set up a kernel stack, so call the
- * get_stack_use_cr30 macro to set up a pointer
- * to the pt_regs structure contained within the
- * task pointer pointed to by cr30. Set the stack
- * pointer to point to the end of the task structure.
- * N.B: We don't use the interrupt stack for the
- * first interrupt from userland, because signals/
- * resched's are processed when returning to userland,
- * and we can sleep in those cases.
- *
* Note that we use shadowed registers for temps until
* we can save %r26 and %r29. %r26 is used to preserve
* %r8 (a shadowed register) which temporarily contained
@@ -1086,23 +1065,13 @@ intr_do_preempt:
intr_extint:
CMPIB=,n 0,%r16,1f
+
get_stack_use_cr30
- b,n 3f
+ b,n 2f
1:
-#if 0 /* Interrupt Stack support not working yet! */
- mfctl %cr31,%r1
- copy %r30,%r17
- /* FIXME! depi below has hardcoded idea of interrupt stack size (32k)*/
- DEPI 0,31,15,%r17
- CMPB=,n %r1,%r17,2f
- get_stack_use_cr31
- b,n 3f
-#endif
-2:
get_stack_use_r30
-
-3:
+2:
save_specials %r29
virt_map
save_general %r29