Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6

* 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6:
  [MATH-EMU]: Fix underflow exception reporting.
  [SPARC64]: Create a HWCAP_SPARC_N2 and report it to userspace on Niagara-2.
  [SPARC64]: SMP trampoline needs to avoid %tick_cmpr on sun4v too.
  [SPARC64]: Do not touch %tick_cmpr on sun4v cpus.
  [SPARC64]: Niagara-2 optimized copies.
  [SPARC64]: Allow userspace to get at the machine description.
  [SPARC32]: Remove superfluous 'kernel_end' alignment on sun4c.
  [SPARC32]: Fix bogus ramdisk image location check.
  [SPARC32]: Remove iommu from struct sbus_bus and use archdata like sparc64.

6 files changed, 27 insertions, 4 deletions

diff --git a/include/asm-sparc/sbus.h b/include/asm-sparc/sbus.h
index d036e4419d79..27d076c46964 100644
--- a/include/asm-sparc/sbus.h
+++ b/include/asm-sparc/sbus.h
@@ -68,7 +68,6 @@ struct sbus_dev {
 /* This struct describes the SBus(s) found on this machine. */
 struct sbus_bus {
         struct of_device        ofdev;
-        void                    *iommu;         /* Opaque IOMMU cookie */
         struct sbus_dev         *devices;       /* Link to devices on this SBus */
         struct sbus_bus         *next;          /* next SBus, if more than one SBus */
         int                     prom_node;      /* PROM device tree node for this SBus */
diff --git a/include/asm-sparc/sfp-machine.h b/include/asm-sparc/sfp-machine.h
index ecfc86a4a725..266a42b8f99f 100644
--- a/include/asm-sparc/sfp-machine.h
+++ b/include/asm-sparc/sfp-machine.h
@@ -203,4 +203,10 @@ extern struct task_struct *last_task_used_math;
 #define FP_INHIBIT_RESULTS ((last_task_used_math->thread.fsr >> 23) & _fex)
 #endif
 
+#ifdef CONFIG_SMP
+#define FP_TRAPPING_EXCEPTIONS ((current->thread.fsr >> 23) & 0x1f)
+#else
+#define FP_TRAPPING_EXCEPTIONS ((last_task_used_math->thread.fsr >> 23) & 0x1f)
+#endif
+
 #endif
diff --git a/include/asm-sparc64/elf.h b/include/asm-sparc64/elf.h
index 303d85e2f82e..8653e8665009 100644
--- a/include/asm-sparc64/elf.h
+++ b/include/asm-sparc64/elf.h
@@ -70,6 +70,7 @@
 #define HWCAP_SPARC_V9          16
 #define HWCAP_SPARC_ULTRA3      32
 #define HWCAP_SPARC_BLKINIT     64
+#define HWCAP_SPARC_N2          128
 
 /*
  * These are used to set parameters in the core dumps.
@@ -155,8 +156,13 @@ static inline unsigned int sparc64_elf_hwcap(void)
 
         if (tlb_type == cheetah || tlb_type == cheetah_plus)
                 cap |= HWCAP_SPARC_ULTRA3;
-        else if (tlb_type == hypervisor)
-                cap |= HWCAP_SPARC_BLKINIT;
+        else if (tlb_type == hypervisor) {
+                if (sun4v_chip_type == SUN4V_CHIP_NIAGARA1 ||
+                    sun4v_chip_type == SUN4V_CHIP_NIAGARA2)
+                        cap |= HWCAP_SPARC_BLKINIT;
+                if (sun4v_chip_type == SUN4V_CHIP_NIAGARA2)
+                        cap |= HWCAP_SPARC_N2;
+        }
 
         return cap;
 }
diff --git a/include/asm-sparc64/sfp-machine.h b/include/asm-sparc64/sfp-machine.h
index 89d42431efb5..c9331b02d9c8 100644
--- a/include/asm-sparc64/sfp-machine.h
+++ b/include/asm-sparc64/sfp-machine.h
@@ -88,4 +88,6 @@
 
 #define FP_INHIBIT_RESULTS ((current_thread_info()->xfsr[0] >> 23) & _fex)
 
+#define FP_TRAPPING_EXCEPTIONS ((current_thread_info()->xfsr[0] >> 23) & 0x1f)
+
 #endif
diff --git a/include/math-emu/op-common.h b/include/math-emu/op-common.h
index 93780abd01bc..bb46e7645d53 100644
--- a/include/math-emu/op-common.h
+++ b/include/math-emu/op-common.h
@@ -145,13 +145,16 @@ do {								\
               {                                                 \
                 X##_e = 1;                                      \
                 _FP_FRAC_SET_##wc(X, _FP_ZEROFRAC_##wc);        \
+                FP_SET_EXCEPTION(FP_EX_INEXACT);                \
               }                                                 \
             else                                                \
               {                                                 \
                 X##_e = 0;                                      \
                 _FP_FRAC_SRL_##wc(X, _FP_WORKBITS);             \
-                FP_SET_EXCEPTION(FP_EX_UNDERFLOW);              \
               }                                                 \
+            if ((FP_CUR_EXCEPTIONS & FP_EX_INEXACT) ||          \
+                (FP_TRAPPING_EXCEPTIONS & FP_EX_UNDERFLOW))     \
+                FP_SET_EXCEPTION(FP_EX_UNDERFLOW);              \
           }                                                     \
         else                                                    \
           {                                                     \
diff --git a/include/math-emu/soft-fp.h b/include/math-emu/soft-fp.h
index d02eb64a865b..a0721ef5c2f9 100644
--- a/include/math-emu/soft-fp.h
+++ b/include/math-emu/soft-fp.h
@@ -97,12 +97,19 @@
 #define FP_INHIBIT_RESULTS 0
 #endif
 
+#ifndef FP_TRAPPING_EXCEPTIONS
+#define FP_TRAPPING_EXCPETIONS 0
+#endif
+
 #define FP_SET_EXCEPTION(ex)                            \
   _fex |= (ex)
   
 #define FP_UNSET_EXCEPTION(ex)                          \
   _fex &= ~(ex)
 
+#define FP_CUR_EXCEPTIONS                               \
+  (_fex)
+
 #define FP_CLEAR_EXCEPTIONS                             \
   _fex = 0