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-rw-r--r--tools/testing/selftests/riscv/mm/mmap_test.h64
1 files changed, 64 insertions, 0 deletions
diff --git a/tools/testing/selftests/riscv/mm/mmap_test.h b/tools/testing/selftests/riscv/mm/mmap_test.h
new file mode 100644
index 000000000000..9b8434f62f57
--- /dev/null
+++ b/tools/testing/selftests/riscv/mm/mmap_test.h
@@ -0,0 +1,64 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+#ifndef _TESTCASES_MMAP_TEST_H
+#define _TESTCASES_MMAP_TEST_H
+#include <sys/mman.h>
+#include <sys/resource.h>
+#include <stddef.h>
+
+#define TOP_DOWN 0
+#define BOTTOM_UP 1
+
+struct addresses {
+ int *no_hint;
+ int *on_37_addr;
+ int *on_38_addr;
+ int *on_46_addr;
+ int *on_47_addr;
+ int *on_55_addr;
+ int *on_56_addr;
+};
+
+static inline void do_mmaps(struct addresses *mmap_addresses)
+{
+ /*
+ * Place all of the hint addresses on the boundaries of mmap
+ * sv39, sv48, sv57
+ * User addresses end at 1<<38, 1<<47, 1<<56 respectively
+ */
+ void *on_37_bits = (void *)(1UL << 37);
+ void *on_38_bits = (void *)(1UL << 38);
+ void *on_46_bits = (void *)(1UL << 46);
+ void *on_47_bits = (void *)(1UL << 47);
+ void *on_55_bits = (void *)(1UL << 55);
+ void *on_56_bits = (void *)(1UL << 56);
+
+ int prot = PROT_READ | PROT_WRITE;
+ int flags = MAP_PRIVATE | MAP_ANONYMOUS;
+
+ mmap_addresses->no_hint =
+ mmap(NULL, 5 * sizeof(int), prot, flags, 0, 0);
+ mmap_addresses->on_37_addr =
+ mmap(on_37_bits, 5 * sizeof(int), prot, flags, 0, 0);
+ mmap_addresses->on_38_addr =
+ mmap(on_38_bits, 5 * sizeof(int), prot, flags, 0, 0);
+ mmap_addresses->on_46_addr =
+ mmap(on_46_bits, 5 * sizeof(int), prot, flags, 0, 0);
+ mmap_addresses->on_47_addr =
+ mmap(on_47_bits, 5 * sizeof(int), prot, flags, 0, 0);
+ mmap_addresses->on_55_addr =
+ mmap(on_55_bits, 5 * sizeof(int), prot, flags, 0, 0);
+ mmap_addresses->on_56_addr =
+ mmap(on_56_bits, 5 * sizeof(int), prot, flags, 0, 0);
+}
+
+static inline int memory_layout(void)
+{
+ int prot = PROT_READ | PROT_WRITE;
+ int flags = MAP_PRIVATE | MAP_ANONYMOUS;
+
+ void *value1 = mmap(NULL, sizeof(int), prot, flags, 0, 0);
+ void *value2 = mmap(NULL, sizeof(int), prot, flags, 0, 0);
+
+ return value2 > value1;
+}
+#endif /* _TESTCASES_MMAP_TEST_H */