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[PARISC] Kill off broken irqstack code

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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>
This commit is contained in:
Kyle McMartin
2007-10-18 00:04:56 -07:00
committed by Kyle McMartin
parent 873d50e2e5
commit 6cc4525d29
6 changed files with 3 additions and 67 deletions
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37
arch/parisc/kernel/entry.S
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@ -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