Merge tag 'metag-v3.9-rc1-v4' of git://git.kernel.org/pub/scm/linux/kernel/git/jhogan/metag

Pull new ImgTec Meta architecture from James Hogan:
 "This adds core architecture support for Imagination's Meta processor
  cores, followed by some later miscellaneous arch/metag cleanups and
  fixes which I kept separate to ease review:

   - Support for basic Meta 1 (ATP) and Meta 2 (HTP) core architecture
   - A few fixes all over, particularly for symbol prefixes
   - A few privilege protection fixes
   - Several cleanups (setup.c includes, split out a lot of
     metag_ksyms.c)
   - Fix some missing exports
   - Convert hugetlb to use vm_unmapped_area()
   - Copy device tree to non-init memory
   - Provide dma_get_sgtable()"

* tag 'metag-v3.9-rc1-v4' of git://git.kernel.org/pub/scm/linux/kernel/git/jhogan/metag: (61 commits)
  metag: Provide dma_get_sgtable()
  metag: prom.h: remove declaration of metag_dt_memblock_reserve()
  metag: copy devicetree to non-init memory
  metag: cleanup metag_ksyms.c includes
  metag: move mm/init.c exports out of metag_ksyms.c
  metag: move usercopy.c exports out of metag_ksyms.c
  metag: move setup.c exports out of metag_ksyms.c
  metag: move kick.c exports out of metag_ksyms.c
  metag: move traps.c exports out of metag_ksyms.c
  metag: move irq enable out of irqflags.h on SMP
  genksyms: fix metag symbol prefix on crc symbols
  metag: hugetlb: convert to vm_unmapped_area()
  metag: export clear_page and copy_page
  metag: export metag_code_cache_flush_all
  metag: protect more non-MMU memory regions
  metag: make TXPRIVEXT bits explicit
  metag: kernel/setup.c: sort includes
  perf: Enable building perf tools for Meta
  metag: add boot time LNKGET/LNKSET check
  metag: add __init to metag_cache_probe()
  ...

1 files changed, 40 insertions, 0 deletions

diff --git a/arch/metag/include/asm/hwthread.h b/arch/metag/include/asm/hwthread.h
new file mode 100644
index 00000000000..8f9786619b1
--- /dev/null
+++ b/arch/metag/include/asm/hwthread.h
@@ -0,0 +1,40 @@
+/*
+ * Copyright (C) 2008 Imagination Technologies
+ */
+#ifndef __METAG_HWTHREAD_H
+#define __METAG_HWTHREAD_H
+
+#include <linux/bug.h>
+#include <linux/io.h>
+
+#include <asm/metag_mem.h>
+
+#define BAD_HWTHREAD_ID		(0xFFU)
+#define BAD_CPU_ID		(0xFFU)
+
+extern u8 cpu_2_hwthread_id[];
+extern u8 hwthread_id_2_cpu[];
+
+/*
+ * Each hardware thread's Control Unit registers are memory-mapped
+ * and can therefore be accessed by any other hardware thread.
+ *
+ * This helper function returns the memory address where "thread"'s
+ * register "regnum" is mapped.
+ */
+static inline
+void __iomem *__CU_addr(unsigned int thread, unsigned int regnum)
+{
+	unsigned int base, thread_offset, thread_regnum;
+
+	WARN_ON(thread == BAD_HWTHREAD_ID);
+
+	base = T0UCTREG0;	/* Control unit base */
+
+	thread_offset = TnUCTRX_STRIDE * thread;
+	thread_regnum = TXUCTREGn_STRIDE * regnum;
+
+	return (void __iomem *)(base + thread_offset + thread_regnum);
+}
+
+#endif /* __METAG_HWTHREAD_H */