eal/arm64: override I/O device read/write access

Override the generic I/O device memory read/write access and implement it
using armv8 instructions for arm64.

Signed-off-by: Jerin Jacob <jerin.jacob@caviumnetworks.com>

diff --git a/lib/librte_eal/common/include/arch/arm/rte_io.h b/lib/librte_eal/common/include/arch/arm/rte_io.h
index 74c1f2c..9593b42 100644 (file)
--- a/lib/librte_eal/common/include/arch/arm/rte_io.h
+++ b/lib/librte_eal/common/include/arch/arm/rte_io.h
@@ -38,7 +38,11 @@
 extern "C" {
 #endif
 
+#ifdef RTE_ARCH_64
+#include "rte_io_64.h"
+#else
 #include "generic/rte_io.h"
+#endif
 
 #ifdef __cplusplus
 }

diff --git a/lib/librte_eal/common/include/arch/arm/rte_io_64.h b/lib/librte_eal/common/include/arch/arm/rte_io_64.h
new file mode 100644 (file)
index 0000000..0402125
--- /dev/null
+++ b/lib/librte_eal/common/include/arch/arm/rte_io_64.h
@@ -0,0 +1,199 @@
+/*
+ *   BSD LICENSE
+ *
+ *   Copyright (C) Cavium networks Ltd. 2016.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Cavium networks nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _RTE_IO_ARM64_H_
+#define _RTE_IO_ARM64_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <stdint.h>
+
+#define RTE_OVERRIDE_IO_H
+
+#include "generic/rte_io.h"
+#include "rte_atomic_64.h"
+
+static inline uint8_t __attribute__((always_inline))
+rte_read8_relaxed(const volatile void *addr)
+{
+       uint8_t val;
+
+       asm volatile(
+                   "ldrb %w[val], [%x[addr]]"
+                   : [val] "=r" (val)
+                   : [addr] "r" (addr));
+       return val;
+}
+
+static inline uint16_t __attribute__((always_inline))
+rte_read16_relaxed(const volatile void *addr)
+{
+       uint16_t val;
+
+       asm volatile(
+                   "ldrh %w[val], [%x[addr]]"
+                   : [val] "=r" (val)
+                   : [addr] "r" (addr));
+       return val;
+}
+
+static inline uint32_t __attribute__((always_inline))
+rte_read32_relaxed(const volatile void *addr)
+{
+       uint32_t val;
+
+       asm volatile(
+                   "ldr %w[val], [%x[addr]]"
+                   : [val] "=r" (val)
+                   : [addr] "r" (addr));
+       return val;
+}
+
+static inline uint64_t __attribute__((always_inline))
+rte_read64_relaxed(const volatile void *addr)
+{
+       uint64_t val;
+
+       asm volatile(
+                   "ldr %x[val], [%x[addr]]"
+                   : [val] "=r" (val)
+                   : [addr] "r" (addr));
+       return val;
+}
+
+static inline void __attribute__((always_inline))
+rte_write8_relaxed(uint8_t val, volatile void *addr)
+{
+       asm volatile(
+                   "strb %w[val], [%x[addr]]"
+                   :
+                   : [val] "r" (val), [addr] "r" (addr));
+}
+
+static inline void __attribute__((always_inline))
+rte_write16_relaxed(uint16_t val, volatile void *addr)
+{
+       asm volatile(
+                   "strh %w[val], [%x[addr]]"
+                   :
+                   : [val] "r" (val), [addr] "r" (addr));
+}
+
+static inline void __attribute__((always_inline))
+rte_write32_relaxed(uint32_t val, volatile void *addr)
+{
+       asm volatile(
+                   "str %w[val], [%x[addr]]"
+                   :
+                   : [val] "r" (val), [addr] "r" (addr));
+}
+
+static inline void __attribute__((always_inline))
+rte_write64_relaxed(uint64_t val, volatile void *addr)
+{
+       asm volatile(
+                   "str %x[val], [%x[addr]]"
+                   :
+                   : [val] "r" (val), [addr] "r" (addr));
+}
+
+static inline uint8_t __attribute__((always_inline))
+rte_read8(const volatile void *addr)
+{
+       uint8_t val;
+       val = rte_read8_relaxed(addr);
+       rte_io_rmb();
+       return val;
+}
+
+static inline uint16_t __attribute__((always_inline))
+rte_read16(const volatile void *addr)
+{
+       uint16_t val;
+       val = rte_read16_relaxed(addr);
+       rte_io_rmb();
+       return val;
+}
+
+static inline uint32_t  __attribute__((always_inline))
+rte_read32(const volatile void *addr)
+{
+       uint32_t val;
+       val = rte_read32_relaxed(addr);
+       rte_io_rmb();
+       return val;
+}
+
+static inline uint64_t __attribute__((always_inline))
+rte_read64(const volatile void *addr)
+{
+       uint64_t val;
+       val = rte_read64_relaxed(addr);
+       rte_io_rmb();
+       return val;
+}
+
+static inline void __attribute__((always_inline))
+rte_write8(uint8_t value, volatile void *addr)
+{
+       rte_io_wmb();
+       rte_write8_relaxed(value, addr);
+}
+
+static inline void __attribute__((always_inline))
+rte_write16(uint16_t value, volatile void *addr)
+{
+       rte_io_wmb();
+       rte_write16_relaxed(value, addr);
+}
+
+static inline void __attribute__((always_inline))
+rte_write32(uint32_t value, volatile void *addr)
+{
+       rte_io_wmb();
+       rte_write32_relaxed(value, addr);
+}
+
+static inline void __attribute__((always_inline))
+rte_write64(uint64_t value, volatile void *addr)
+{
+       rte_io_wmb();
+       rte_write64_relaxed(value, addr);
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _RTE_IO_ARM64_H_ */