Merge tag 'arm64-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas/linux-aarch64

Pull arm64 support from Catalin Marinas:
 "Linux support for the 64-bit ARM architecture (AArch64)

  Features currently supported:
   - 39-bit address space for user and kernel (each)
   - 4KB and 64KB page configurations
   - Compat (32-bit) user applications (ARMv7, EABI only)
   - Flattened Device Tree (mandated for all AArch64 platforms)
   - ARM generic timers"

* tag 'arm64-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas/linux-aarch64: (35 commits)
  arm64: ptrace: remove obsolete ptrace request numbers from user headers
  arm64: Do not set the SMP/nAMP processor bit
  arm64: MAINTAINERS update
  arm64: Build infrastructure
  arm64: Miscellaneous header files
  arm64: Generic timers support
  arm64: Loadable modules
  arm64: Miscellaneous library functions
  arm64: Performance counters support
  arm64: Add support for /proc/sys/debug/exception-trace
  arm64: Debugging support
  arm64: Floating point and SIMD
  arm64: 32-bit (compat) applications support
  arm64: User access library functions
  arm64: Signal handling support
  arm64: VDSO support
  arm64: System calls handling
  arm64: ELF definitions
  arm64: SMP support
  arm64: DMA mapping API
  ...

1 files changed, 80 insertions, 0 deletions

diff --git a/arch/arm64/kernel/entry-fpsimd.S b/arch/arm64/kernel/entry-fpsimd.S
new file mode 100644
index 000000000000..17988a6e7ea2
--- /dev/null
+++ b/arch/arm64/kernel/entry-fpsimd.S
@@ -0,0 +1,80 @@
+/*
+ * FP/SIMD state saving and restoring
+ *
+ * Copyright (C) 2012 ARM Ltd.
+ * Author: Catalin Marinas <catalin.marinas@arm.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/linkage.h>
+
+#include <asm/assembler.h>
+
+/*
+ * Save the FP registers.
+ *
+ * x0 - pointer to struct fpsimd_state
+ */
+ENTRY(fpsimd_save_state)
+	stp	q0, q1, [x0, #16 * 0]
+	stp	q2, q3, [x0, #16 * 2]
+	stp	q4, q5, [x0, #16 * 4]
+	stp	q6, q7, [x0, #16 * 6]
+	stp	q8, q9, [x0, #16 * 8]
+	stp	q10, q11, [x0, #16 * 10]
+	stp	q12, q13, [x0, #16 * 12]
+	stp	q14, q15, [x0, #16 * 14]
+	stp	q16, q17, [x0, #16 * 16]
+	stp	q18, q19, [x0, #16 * 18]
+	stp	q20, q21, [x0, #16 * 20]
+	stp	q22, q23, [x0, #16 * 22]
+	stp	q24, q25, [x0, #16 * 24]
+	stp	q26, q27, [x0, #16 * 26]
+	stp	q28, q29, [x0, #16 * 28]
+	stp	q30, q31, [x0, #16 * 30]!
+	mrs	x8, fpsr
+	str	w8, [x0, #16 * 2]
+	mrs	x8, fpcr
+	str	w8, [x0, #16 * 2 + 4]
+	ret
+ENDPROC(fpsimd_save_state)
+
+/*
+ * Load the FP registers.
+ *
+ * x0 - pointer to struct fpsimd_state
+ */
+ENTRY(fpsimd_load_state)
+	ldp	q0, q1, [x0, #16 * 0]
+	ldp	q2, q3, [x0, #16 * 2]
+	ldp	q4, q5, [x0, #16 * 4]
+	ldp	q6, q7, [x0, #16 * 6]
+	ldp	q8, q9, [x0, #16 * 8]
+	ldp	q10, q11, [x0, #16 * 10]
+	ldp	q12, q13, [x0, #16 * 12]
+	ldp	q14, q15, [x0, #16 * 14]
+	ldp	q16, q17, [x0, #16 * 16]
+	ldp	q18, q19, [x0, #16 * 18]
+	ldp	q20, q21, [x0, #16 * 20]
+	ldp	q22, q23, [x0, #16 * 22]
+	ldp	q24, q25, [x0, #16 * 24]
+	ldp	q26, q27, [x0, #16 * 26]
+	ldp	q28, q29, [x0, #16 * 28]
+	ldp	q30, q31, [x0, #16 * 30]!
+	ldr	w8, [x0, #16 * 2]
+	ldr	w9, [x0, #16 * 2 + 4]
+	msr	fpsr, x8
+	msr	fpcr, x9
+	ret
+ENDPROC(fpsimd_load_state)