1 files changed, 23 insertions, 91 deletions

diff --git a/arch/sh/kernel/process_32.c b/arch/sh/kernel/process_32.c
index d8af889366a4..856010f9ebc9 100644
--- a/arch/sh/kernel/process_32.c
+++ b/arch/sh/kernel/process_32.c
@@ -25,17 +25,15 @@
 #include <linux/fs.h>
 #include <linux/ftrace.h>
 #include <linux/preempt.h>
+#include <linux/hw_breakpoint.h>
 #include <asm/uaccess.h>
 #include <asm/mmu_context.h>
 #include <asm/pgalloc.h>
 #include <asm/system.h>
-#include <asm/ubc.h>
 #include <asm/fpu.h>
 #include <asm/syscalls.h>
 #include <asm/watchdog.h>
 
-int ubc_usercnt = 0;
-
 #ifdef CONFIG_32BIT
 static void watchdog_trigger_immediate(void)
 {
@@ -147,21 +145,34 @@ int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags)
 }
 EXPORT_SYMBOL(kernel_thread);
 
+void start_thread(struct pt_regs *regs, unsigned long new_pc,
+                  unsigned long new_sp)
+{
+        set_fs(USER_DS);
+
+        regs->pr = 0;
+        regs->sr = SR_FD;
+        regs->pc = new_pc;
+        regs->regs[15] = new_sp;
+
+        free_thread_xstate(current);
+}
+EXPORT_SYMBOL(start_thread);
+
 /*
  * Free current thread data structures etc..
  */
 void exit_thread(void)
 {
-        if (current->thread.ubc_pc) {
-                current->thread.ubc_pc = 0;
-                ubc_usercnt -= 1;
-        }
 }
 
 void flush_thread(void)
 {
-#if defined(CONFIG_SH_FPU)
         struct task_struct *tsk = current;
+
+        flush_ptrace_hw_breakpoint(tsk);
+
+#if defined(CONFIG_SH_FPU)
         /* Forget lazy FPU state */
         clear_fpu(tsk, task_pt_regs(tsk));
         clear_used_math();
@@ -209,11 +220,10 @@ int copy_thread(unsigned long clone_flags, unsigned long usp,
 {
         struct thread_info *ti = task_thread_info(p);
         struct pt_regs *childregs;
+
 #if defined(CONFIG_SH_DSP)
         struct task_struct *tsk = current;
-#endif
 
-#if defined(CONFIG_SH_DSP)
         if (is_dsp_enabled(tsk)) {
                 /* We can use the __save_dsp or just copy the struct:
                  * __save_dsp(p);
@@ -244,53 +254,11 @@ int copy_thread(unsigned long clone_flags, unsigned long usp,
         p->thread.sp = (unsigned long) childregs;
         p->thread.pc = (unsigned long) ret_from_fork;
 
-        p->thread.ubc_pc = 0;
+        memset(p->thread.ptrace_bps, 0, sizeof(p->thread.ptrace_bps));
 
         return 0;
 }
 
-/* Tracing by user break controller.  */
-static void ubc_set_tracing(int asid, unsigned long pc)
-{
-#if defined(CONFIG_CPU_SH4A)
-        unsigned long val;
-
-        val = (UBC_CBR_ID_INST | UBC_CBR_RW_READ | UBC_CBR_CE);
-        val |= (UBC_CBR_AIE | UBC_CBR_AIV_SET(asid));
-
-        ctrl_outl(val, UBC_CBR0);
-        ctrl_outl(pc,  UBC_CAR0);
-        ctrl_outl(0x0, UBC_CAMR0);
-        ctrl_outl(0x0, UBC_CBCR);
-
-        val = (UBC_CRR_RES | UBC_CRR_PCB | UBC_CRR_BIE);
-        ctrl_outl(val, UBC_CRR0);
-
-        /* Read UBC register that we wrote last, for checking update */
-        val = ctrl_inl(UBC_CRR0);
-
-#else   /* CONFIG_CPU_SH4A */
-        ctrl_outl(pc, UBC_BARA);
-
-#ifdef CONFIG_MMU
-        ctrl_outb(asid, UBC_BASRA);
-#endif
-
-        ctrl_outl(0, UBC_BAMRA);
-
-        if (current_cpu_data.type == CPU_SH7729 ||
-            current_cpu_data.type == CPU_SH7710 ||
-            current_cpu_data.type == CPU_SH7712 ||
-            current_cpu_data.type == CPU_SH7203){
-                ctrl_outw(BBR_INST | BBR_READ | BBR_CPU, UBC_BBRA);
-                ctrl_outl(BRCR_PCBA | BRCR_PCTE, UBC_BRCR);
-        } else {
-                ctrl_outw(BBR_INST | BBR_READ, UBC_BBRA);
-                ctrl_outw(BRCR_PCBA, UBC_BRCR);
-        }
-#endif  /* CONFIG_CPU_SH4A */
-}
-
 /*
  *      switch_to(x,y) should switch tasks from x to y.
  *
@@ -304,7 +272,7 @@ __switch_to(struct task_struct *prev, struct task_struct *next)
 
         /* we're going to use this soon, after a few expensive things */
         if (next->fpu_counter > 5)
-                prefetch(&next_t->fpu.hard);
+                prefetch(next_t->xstate);
 
 #ifdef CONFIG_MMU
         /*
@@ -316,32 +284,13 @@ __switch_to(struct task_struct *prev, struct task_struct *next)
                      : "r" (task_thread_info(next)));
 #endif
 
-        /* If no tasks are using the UBC, we're done */
-        if (ubc_usercnt == 0)
-                /* If no tasks are using the UBC, we're done */;
-        else if (next->thread.ubc_pc && next->mm) {
-                int asid = 0;
-#ifdef CONFIG_MMU
-                asid |= cpu_asid(smp_processor_id(), next->mm);
-#endif
-                ubc_set_tracing(asid, next->thread.ubc_pc);
-        } else {
-#if defined(CONFIG_CPU_SH4A)
-                ctrl_outl(UBC_CBR_INIT, UBC_CBR0);
-                ctrl_outl(UBC_CRR_INIT, UBC_CRR0);
-#else
-                ctrl_outw(0, UBC_BBRA);
-                ctrl_outw(0, UBC_BBRB);
-#endif
-        }
-
         /*
          * If the task has used fpu the last 5 timeslices, just do a full
          * restore of the math state immediately to avoid the trap; the
          * chances of needing FPU soon are obviously high now
          */
         if (next->fpu_counter > 5)
-                fpu_state_restore(task_pt_regs(next));
+                __fpu_state_restore();
 
         return prev;
 }
@@ -434,20 +383,3 @@ unsigned long get_wchan(struct task_struct *p)
 
         return pc;
 }
-
-asmlinkage void break_point_trap(void)
-{
-        /* Clear tracing.  */
-#if defined(CONFIG_CPU_SH4A)
-        ctrl_outl(UBC_CBR_INIT, UBC_CBR0);
-        ctrl_outl(UBC_CRR_INIT, UBC_CRR0);
-#else
-        ctrl_outw(0, UBC_BBRA);
-        ctrl_outw(0, UBC_BBRB);
-        ctrl_outl(0, UBC_BRCR);
-#endif
-        current->thread.ubc_pc = 0;
-        ubc_usercnt -= 1;
-
-        force_sig(SIGTRAP, current);
-}