diff options
Diffstat (limited to 'arch/parisc/kernel/entry.S')
| -rw-r--r-- | arch/parisc/kernel/entry.S | 41 |
1 files changed, 5 insertions, 36 deletions
diff --git a/arch/parisc/kernel/entry.S b/arch/parisc/kernel/entry.S index 42598abf4576..111d47284eac 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 @@ -652,7 +631,7 @@ .text - .align 4096 + .align PAGE_SIZE ENTRY(fault_vector_20) /* First vector is invalid (0) */ @@ -904,7 +883,7 @@ ENDPROC(_switch_to) * */ - .align 4096 + .align PAGE_SIZE ENTRY(syscall_exit_rfi) mfctl %cr30,%r16 @@ -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 |