Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus

Pull MIPS updates from Ralf Baechle:
 "This is the main pull request for 3.17.  It contains:

   - misc Cavium Octeon, BCM47xx, BCM63xx and Alchemy  updates
   - MIPS ptrace updates and cleanups
   - various fixes that will also go to -stable
   - a number of cleanups and small non-critical fixes.
   - NUMA support for the Loongson 3.
   - more support for MSA
   - support for MAAR
   - various FP enhancements and fixes"

* 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus: (139 commits)
  MIPS: jz4740: remove unnecessary null test before debugfs_remove
  MIPS: Octeon: remove unnecessary null test before debugfs_remove_recursive
  MIPS: ZBOOT: implement stack protector in compressed boot phase
  MIPS: mipsreg: remove duplicate MIPS_CONF4_FTLBSETS_SHIFT
  MIPS: Bonito64: remove a duplicate define
  MIPS: Malta: initialise MAARs
  MIPS: Initialise MAARs
  MIPS: detect presence of MAARs
  MIPS: define MAAR register accessors & bits
  MIPS: mark MSA experimental
  MIPS: Don't build MSA support unless it can be used
  MIPS: consistently clear MSA flags when starting & copying threads
  MIPS: 16 byte align MSA vector context
  MIPS: disable preemption whilst initialising MSA
  MIPS: ensure MSA gets disabled during boot
  MIPS: fix read_msa_* & write_msa_* functions on non-MSA toolchains
  MIPS: fix MSA context for tasks which don't use FP first
  MIPS: init upper 64b of vector registers when MSA is first used
  MIPS: save/disable MSA in lose_fpu
  MIPS: preserve scalar FP CSR when switching vector context
  ...

1 files changed, 33 insertions, 0 deletions

diff --git a/arch/mips/mm/init.c b/arch/mips/mm/init.c
index 6e4413330e36..571aab064936 100644
--- a/arch/mips/mm/init.c
+++ b/arch/mips/mm/init.c
@@ -325,6 +325,38 @@ static inline void mem_init_free_highmem(void)
 #endif
 }
 
+unsigned __weak platform_maar_init(unsigned num_maars)
+{
+	return 0;
+}
+
+static void maar_init(void)
+{
+	unsigned num_maars, used, i;
+
+	if (!cpu_has_maar)
+		return;
+
+	/* Detect the number of MAARs */
+	write_c0_maari(~0);
+	back_to_back_c0_hazard();
+	num_maars = read_c0_maari() + 1;
+
+	/* MAARs should be in pairs */
+	WARN_ON(num_maars % 2);
+
+	/* Configure the required MAARs */
+	used = platform_maar_init(num_maars / 2);
+
+	/* Disable any further MAARs */
+	for (i = (used * 2); i < num_maars; i++) {
+		write_c0_maari(i);
+		back_to_back_c0_hazard();
+		write_c0_maar(0);
+		back_to_back_c0_hazard();
+	}
+}
+
 void __init mem_init(void)
 {
 #ifdef CONFIG_HIGHMEM
@@ -337,6 +369,7 @@ void __init mem_init(void)
 #endif
 	high_memory = (void *) __va(max_low_pfn << PAGE_SHIFT);
 
+	maar_init();
 	free_all_bootmem();
 	setup_zero_pages();	/* Setup zeroed pages.  */
 	mem_init_free_highmem();