Merge tag 'xtensa-next-20130225' of git://github.com/czankel/xtensa-linux

Pull xtensa update from Chris Zankel:
 "Added features:
   - add support for thread local storage (TLS)

   - add accept4 and finit_module syscalls

   - support medium-priority interrupts

   - add support for dc232c processor variant

   - support file-base simulated disk for ISS simulator

  Bug fixes:

   - fix return values returned by the str[n]cmp functions

   - avoid mmap cache aliasing

   - fix handling of 'windowed registers' in ptrace"

* tag 'xtensa-next-20130225' of git://github.com/czankel/xtensa-linux:
  xtensa: add accept4 syscall
  xtensa: add support for TLS
  xtensa: add missing include asm/uaccess.h to checksum.h
  xtensa: do not enable GENERIC_GPIO by default
  xtensa: complete ptrace handling of register windows
  xtensa: add support for oprofile
  xtensa: move spill_registers to traps.h
  xtensa: ISS: add host file-based simulated disk
  xtensa: fix str[n]cmp return value
  xtensa: avoid mmap cache aliasing
  xtensa: add finit_module syscall
  xtensa: pull signal definitions from signal-defs.h
  xtensa: fix ipc_parse_version selection
  xtensa: dispatch medium-priority interrupts
  xtensa: Add config files for Diamond 233L - Rev C processor variant
  xtensa: use new common dtc rule
  xtensa: rename prom_update_property to of_update_property

1 files changed, 24 insertions, 0 deletions

diff --git a/arch/xtensa/include/asm/traps.h b/arch/xtensa/include/asm/traps.h
index 54f70440185e..b5464ef3cf66 100644
--- a/arch/xtensa/include/asm/traps.h
+++ b/arch/xtensa/include/asm/traps.h
@@ -20,4 +20,28 @@
 extern void * __init trap_set_handler(int cause, void *handler);
 extern void do_unhandled(struct pt_regs *regs, unsigned long exccause);
 
+static inline void spill_registers(void)
+{
+	unsigned int a0, ps;
+
+	__asm__ __volatile__ (
+		"movi	a14, " __stringify(PS_EXCM_BIT | LOCKLEVEL) "\n\t"
+		"mov	a12, a0\n\t"
+		"rsr	a13, sar\n\t"
+		"xsr	a14, ps\n\t"
+		"movi	a0, _spill_registers\n\t"
+		"rsync\n\t"
+		"callx0 a0\n\t"
+		"mov	a0, a12\n\t"
+		"wsr	a13, sar\n\t"
+		"wsr	a14, ps\n\t"
+		: : "a" (&a0), "a" (&ps)
+#if defined(CONFIG_FRAME_POINTER)
+		: "a2", "a3", "a4",       "a11", "a12", "a13", "a14", "a15",
+#else
+		: "a2", "a3", "a4", "a7", "a11", "a12", "a13", "a14", "a15",
+#endif
+		  "memory");
+}
+
 #endif /* _XTENSA_TRAPS_H */