MIPS: Add Cavium OCTEON processor support files to arch/mips/cavium-octeon.

These are the rest of the new files needed to add OCTEON processor
support to the Linux kernel.  Other than Makefile and Kconfig which
should be obvious, we have:

csrc-octeon.c   -- Clock source driver for OCTEON.
dma-octeon.c    -- Helper functions for mapping DMA memory.
flash_setup.c   -- Register on-board flash with the MTD subsystem.
octeon-irq.c    -- OCTEON interrupt controller managment.
octeon-memcpy.S -- Optimized memcpy() implementation.
serial.c        -- Register 8250 platform driver and early console.
setup.c         -- Early architecture initialization.
smp.c           -- OCTEON SMP support.
octeon_switch.S -- Scheduler context switch for OCTEON.
c-octeon.c      -- OCTEON cache controller support.
cex-oct.S       -- OCTEON cache exception handler.

asm/mach-cavium-octeon/*.h -- Architecture include files.

Signed-off-by: Tomaso Paoletti <tpaoletti@caviumnetworks.com>
Signed-off-by: David Daney <ddaney@caviumnetworks.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

 create mode 100644 arch/mips/cavium-octeon/Kconfig
 create mode 100644 arch/mips/cavium-octeon/Makefile
 create mode 100644 arch/mips/cavium-octeon/csrc-octeon.c
 create mode 100644 arch/mips/cavium-octeon/dma-octeon.c
 create mode 100644 arch/mips/cavium-octeon/flash_setup.c
 create mode 100644 arch/mips/cavium-octeon/octeon-irq.c
 create mode 100644 arch/mips/cavium-octeon/octeon-memcpy.S
 create mode 100644 arch/mips/cavium-octeon/serial.c
 create mode 100644 arch/mips/cavium-octeon/setup.c
 create mode 100644 arch/mips/cavium-octeon/smp.c
 create mode 100644 arch/mips/include/asm/mach-cavium-octeon/cpu-feature-overrides.h
 create mode 100644 arch/mips/include/asm/mach-cavium-octeon/dma-coherence.h
 create mode 100644 arch/mips/include/asm/mach-cavium-octeon/irq.h
 create mode 100644 arch/mips/include/asm/mach-cavium-octeon/kernel-entry-init.h
 create mode 100644 arch/mips/include/asm/mach-cavium-octeon/war.h
 create mode 100644 arch/mips/include/asm/octeon/octeon.h
 create mode 100644 arch/mips/kernel/octeon_switch.S
 create mode 100644 arch/mips/mm/c-octeon.c
 create mode 100644 arch/mips/mm/cex-oct.S

1 files changed, 70 insertions, 0 deletions

diff --git a/arch/mips/mm/cex-oct.S b/arch/mips/mm/cex-oct.S
new file mode 100644
index 000000000000..3db8553fcd34
--- /dev/null
+++ b/arch/mips/mm/cex-oct.S
@@ -0,0 +1,70 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2006 Cavium Networks
+ * Cache error handler
+ */
+
+#include <asm/asm.h>
+#include <asm/regdef.h>
+#include <asm/mipsregs.h>
+#include <asm/stackframe.h>
+
+/*
+ * Handle cache error. Indicate to the second level handler whether
+ * the exception is recoverable.
+ */
+        LEAF(except_vec2_octeon)
+
+        .set    push
+        .set    mips64r2
+        .set    noreorder
+        .set    noat
+
+
+        /* due to an errata we need to read the COP0 CacheErr (Dcache)
+         * before any cache/DRAM access  */
+
+        rdhwr   k0, $0        /* get core_id */
+        PTR_LA  k1, cache_err_dcache
+        sll     k0, k0, 3
+        PTR_ADDU k1, k0, k1    /* k1 = &cache_err_dcache[core_id] */
+
+        dmfc0   k0, CP0_CACHEERR, 1
+        sd      k0, (k1)
+        dmtc0   $0, CP0_CACHEERR, 1
+
+        /* check whether this is a nested exception */
+        mfc0    k1, CP0_STATUS
+        andi    k1, k1, ST0_EXL
+        beqz    k1, 1f
+         nop
+        j       cache_parity_error_octeon_non_recoverable
+         nop
+
+        /* exception is recoverable */
+1:      j       handle_cache_err
+         nop
+
+        .set    pop
+        END(except_vec2_octeon)
+
+ /* We need to jump to handle_cache_err so that the previous handler
+  * can fit within 0x80 bytes. We also move from 0xFFFFFFFFAXXXXXXX
+  * space (uncached) to the 0xFFFFFFFF8XXXXXXX space (cached).  */
+        LEAF(handle_cache_err)
+        .set    push
+        .set    noreorder
+        .set    noat
+
+        SAVE_ALL
+        KMODE
+        jal     cache_parity_error_octeon_recoverable
+        nop
+        j       ret_from_exception
+        nop
+
+        .set pop
+        END(handle_cache_err)