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authorMarc Zyngier <marc.zyngier@arm.com>2012-11-12 13:24:27 +0000
committerCatalin Marinas <catalin.marinas@arm.com>2012-12-05 11:26:50 +0000
commitcfc5180e5a1b5f41f4936c4945a395f4d8885d66 (patch)
treec6a76b685652345861e43d86e20aa1925825eabe /arch/arm64
parent7dbfbe5b2f5fc01fb0a19a0d58820ba4ebb07884 (diff)
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arm64: move FP-SIMD save/restore code to a macro
In order to be able to reuse the save-restore code in KVM, move it to a pair of macros, similar to what the 32bit code does. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm64')
-rw-r--r--arch/arm64/include/asm/fpsimdmacros.h64
-rw-r--r--arch/arm64/kernel/entry-fpsimd.S43
2 files changed, 67 insertions, 40 deletions
diff --git a/arch/arm64/include/asm/fpsimdmacros.h b/arch/arm64/include/asm/fpsimdmacros.h
new file mode 100644
index 0000000..bbec599
--- /dev/null
+++ b/arch/arm64/include/asm/fpsimdmacros.h
@@ -0,0 +1,64 @@
+/*
+ * FP/SIMD state saving and restoring macros
+ *
+ * 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/>.
+ */
+
+.macro fpsimd_save state, tmpnr
+ stp q0, q1, [\state, #16 * 0]
+ stp q2, q3, [\state, #16 * 2]
+ stp q4, q5, [\state, #16 * 4]
+ stp q6, q7, [\state, #16 * 6]
+ stp q8, q9, [\state, #16 * 8]
+ stp q10, q11, [\state, #16 * 10]
+ stp q12, q13, [\state, #16 * 12]
+ stp q14, q15, [\state, #16 * 14]
+ stp q16, q17, [\state, #16 * 16]
+ stp q18, q19, [\state, #16 * 18]
+ stp q20, q21, [\state, #16 * 20]
+ stp q22, q23, [\state, #16 * 22]
+ stp q24, q25, [\state, #16 * 24]
+ stp q26, q27, [\state, #16 * 26]
+ stp q28, q29, [\state, #16 * 28]
+ stp q30, q31, [\state, #16 * 30]!
+ mrs x\tmpnr, fpsr
+ str w\tmpnr, [\state, #16 * 2]
+ mrs x\tmpnr, fpcr
+ str w\tmpnr, [\state, #16 * 2 + 4]
+.endm
+
+.macro fpsimd_restore state, tmpnr
+ ldp q0, q1, [\state, #16 * 0]
+ ldp q2, q3, [\state, #16 * 2]
+ ldp q4, q5, [\state, #16 * 4]
+ ldp q6, q7, [\state, #16 * 6]
+ ldp q8, q9, [\state, #16 * 8]
+ ldp q10, q11, [\state, #16 * 10]
+ ldp q12, q13, [\state, #16 * 12]
+ ldp q14, q15, [\state, #16 * 14]
+ ldp q16, q17, [\state, #16 * 16]
+ ldp q18, q19, [\state, #16 * 18]
+ ldp q20, q21, [\state, #16 * 20]
+ ldp q22, q23, [\state, #16 * 22]
+ ldp q24, q25, [\state, #16 * 24]
+ ldp q26, q27, [\state, #16 * 26]
+ ldp q28, q29, [\state, #16 * 28]
+ ldp q30, q31, [\state, #16 * 30]!
+ ldr w\tmpnr, [\state, #16 * 2]
+ msr fpsr, x\tmpnr
+ ldr w\tmpnr, [\state, #16 * 2 + 4]
+ msr fpcr, x\tmpnr
+.endm
diff --git a/arch/arm64/kernel/entry-fpsimd.S b/arch/arm64/kernel/entry-fpsimd.S
index 17988a6..6a27cd6 100644
--- a/arch/arm64/kernel/entry-fpsimd.S
+++ b/arch/arm64/kernel/entry-fpsimd.S
@@ -20,6 +20,7 @@
#include <linux/linkage.h>
#include <asm/assembler.h>
+#include <asm/fpsimdmacros.h>
/*
* Save the FP registers.
@@ -27,26 +28,7 @@
* 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]
+ fpsimd_save x0, 8
ret
ENDPROC(fpsimd_save_state)
@@ -56,25 +38,6 @@ ENDPROC(fpsimd_save_state)
* 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
+ fpsimd_restore x0, 8
ret
ENDPROC(fpsimd_load_state)