linux-gen: ishm: internal shared memory allocator (ishm) added

A new ODP internal memory allocator, called ishm (for internal shmem)
is introduced here.
This memory allocator enables the following:
- works for odpthreads being linux processes, regardless for fork time.
- guarantees the uniqueness of the virtual space mapping address over
all ODP threads (even processes and regardless of fork time),
when the required _ODP_ISHM_SINGLE_VA flag is used.

Signed-off-by: Christophe Milard <christophe.milard@linaro.org>
Reviewed-and-tested-by: Bill Fischofer <bill.fischofer@linaro.org>
Reviewed-by: Brian Brooks <brian.brooks@linaro.org>
Signed-off-by: Maxim Uvarov <maxim.uvarov@linaro.org>

1 files changed, 24 insertions, 0 deletions

diff --git a/platform/linux-generic/include/ishmphy_internal.h b/platform/linux-generic/include/ishmphy_internal.h
new file mode 100644
index 000000000..0bc4207af
--- /dev/null
+++ b/platform/linux-generic/include/ishmphy_internal.h
@@ -0,0 +1,24 @@
+/* Copyright (c) 2016, Linaro Limited
+ * All rights reserved.
+ *
+ * SPDX-License-Identifier:     BSD-3-Clause
+ */
+
+#ifndef _ISHMPHY_INTERNAL_H_
+#define _ISHMPHY_INTERNAL_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+void *_ishmphy_book_va(uint64_t len);
+int _ishmphy_unbook_va(void);
+void *_ishmphy_map(int fd, void *start, uint64_t size,
+		   int flags, int mmap_flags);
+int _ishmphy_unmap(void *start, uint64_t len, int flags);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif