arm64: Assembly macros and definitions

This patch introduces several assembly macros and definitions used in
the .S files across arch/arm64/ like IRQ disabling/enabling, together
with asm-offsets.c.

Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Nicolas Pitre <nico@linaro.org>
Acked-by: Olof Johansson <olof@lixom.net>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>

1 files changed, 55 insertions, 0 deletions

diff --git a/arch/arm64/mm/proc-macros.S b/arch/arm64/mm/proc-macros.S
new file mode 100644
index 000000000000..8957b822010b
--- /dev/null
+++ b/arch/arm64/mm/proc-macros.S
@@ -0,0 +1,55 @@
+/*
+ * Based on arch/arm/mm/proc-macros.S
+ *
+ * Copyright (C) 2012 ARM Ltd.
+ *
+ * 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 <asm/asm-offsets.h>
+#include <asm/thread_info.h>
+
+/*
+ * vma_vm_mm - get mm pointer from vma pointer (vma->vm_mm)
+ */
+        .macro  vma_vm_mm, rd, rn
+        ldr     \rd, [\rn, #VMA_VM_MM]
+        .endm
+
+/*
+ * mmid - get context id from mm pointer (mm->context.id)
+ */
+        .macro  mmid, rd, rn
+        ldr     \rd, [\rn, #MM_CONTEXT_ID]
+        .endm
+
+/*
+ * dcache_line_size - get the minimum D-cache line size from the CTR register.
+ */
+        .macro  dcache_line_size, reg, tmp
+        mrs     \tmp, ctr_el0                   // read CTR
+        lsr     \tmp, \tmp, #16
+        and     \tmp, \tmp, #0xf                // cache line size encoding
+        mov     \reg, #4                        // bytes per word
+        lsl     \reg, \reg, \tmp                // actual cache line size
+        .endm
+
+/*
+ * icache_line_size - get the minimum I-cache line size from the CTR register.
+ */
+        .macro  icache_line_size, reg, tmp
+        mrs     \tmp, ctr_el0                   // read CTR
+        and     \tmp, \tmp, #0xf                // cache line size encoding
+        mov     \reg, #4                        // bytes per word
+        lsl     \reg, \reg, \tmp                // actual cache line size
+        .endm