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Diffstat (limited to 'arch/sparc64/mm/fault.c')
-rw-r--r--arch/sparc64/mm/fault.c37
1 files changed, 0 insertions, 37 deletions
diff --git a/arch/sparc64/mm/fault.c b/arch/sparc64/mm/fault.c
index ea7d7ae76bc..a9e474bf638 100644
--- a/arch/sparc64/mm/fault.c
+++ b/arch/sparc64/mm/fault.c
@@ -51,43 +51,6 @@ static inline int notify_page_fault(struct pt_regs *regs)
}
#endif
-/*
- * To debug kernel to catch accesses to certain virtual/physical addresses.
- * Mode = 0 selects physical watchpoints, mode = 1 selects virtual watchpoints.
- * flags = VM_READ watches memread accesses, flags = VM_WRITE watches memwrite accesses.
- * Caller passes in a 64bit aligned addr, with mask set to the bytes that need to be
- * watched. This is only useful on a single cpu machine for now. After the watchpoint
- * is detected, the process causing it will be killed, thus preventing an infinite loop.
- */
-void set_brkpt(unsigned long addr, unsigned char mask, int flags, int mode)
-{
- unsigned long lsubits;
-
- __asm__ __volatile__("ldxa [%%g0] %1, %0"
- : "=r" (lsubits)
- : "i" (ASI_LSU_CONTROL));
- lsubits &= ~(LSU_CONTROL_PM | LSU_CONTROL_VM |
- LSU_CONTROL_PR | LSU_CONTROL_VR |
- LSU_CONTROL_PW | LSU_CONTROL_VW);
-
- __asm__ __volatile__("stxa %0, [%1] %2\n\t"
- "membar #Sync"
- : /* no outputs */
- : "r" (addr), "r" (mode ? VIRT_WATCHPOINT : PHYS_WATCHPOINT),
- "i" (ASI_DMMU));
-
- lsubits |= ((unsigned long)mask << (mode ? 25 : 33));
- if (flags & VM_READ)
- lsubits |= (mode ? LSU_CONTROL_VR : LSU_CONTROL_PR);
- if (flags & VM_WRITE)
- lsubits |= (mode ? LSU_CONTROL_VW : LSU_CONTROL_PW);
- __asm__ __volatile__("stxa %0, [%%g0] %1\n\t"
- "membar #Sync"
- : /* no outputs */
- : "r" (lsubits), "i" (ASI_LSU_CONTROL)
- : "memory");
-}
-
static void __kprobes unhandled_fault(unsigned long address,
struct task_struct *tsk,
struct pt_regs *regs)