Initial commit: OpenHarmony-v4.0-ReleaseOpenHarmony-v4.0-Release

1 files changed, 111 insertions, 0 deletions

diff --git a/lib/test_bitops.c b/lib/test_bitops.c
new file mode 100644
index 000000000..471141ddd
--- /dev/null
+++ b/lib/test_bitops.c
@@ -0,0 +1,111 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2020 Intel Corporation
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/printk.h>
+
+/* a tiny module only meant to test
+ *
+ *   set/clear_bit
+ *   get_count_order/long
+ */
+
+/* use an enum because thats the most common BITMAP usage */
+enum bitops_fun {
+        BITOPS_4 = 4,
+        BITOPS_7 = 7,
+        BITOPS_11 = 11,
+        BITOPS_31 = 31,
+        BITOPS_88 = 88,
+        BITOPS_LAST = 255,
+        BITOPS_LENGTH = 256
+};
+
+static DECLARE_BITMAP(g_bitmap, BITOPS_LENGTH);
+
+static unsigned int order_comb[][2] = {
+        {0x00000003,  2},
+        {0x00000004,  2},
+        {0x00001fff, 13},
+        {0x00002000, 13},
+        {0x50000000, 31},
+        {0x80000000, 31},
+        {0x80003000, 32},
+};
+
+#ifdef CONFIG_64BIT
+static unsigned long order_comb_long[][2] = {
+        {0x0000000300000000, 34},
+        {0x0000000400000000, 34},
+        {0x00001fff00000000, 45},
+        {0x0000200000000000, 45},
+        {0x5000000000000000, 63},
+        {0x8000000000000000, 63},
+        {0x8000300000000000, 64},
+};
+#endif
+
+static int __init test_bitops_startup(void)
+{
+        int i, bit_set;
+
+        pr_info("Starting bitops test\n");
+        set_bit(BITOPS_4, g_bitmap);
+        set_bit(BITOPS_7, g_bitmap);
+        set_bit(BITOPS_11, g_bitmap);
+        set_bit(BITOPS_31, g_bitmap);
+        set_bit(BITOPS_88, g_bitmap);
+
+        for (i = 0; i < ARRAY_SIZE(order_comb); i++) {
+                if (order_comb[i][1] != get_count_order(order_comb[i][0]))
+                        pr_warn("get_count_order wrong for %x\n",
+                                       order_comb[i][0]);
+        }
+
+        for (i = 0; i < ARRAY_SIZE(order_comb); i++) {
+                if (order_comb[i][1] != get_count_order_long(order_comb[i][0]))
+                        pr_warn("get_count_order_long wrong for %x\n",
+                                       order_comb[i][0]);
+        }
+
+#ifdef CONFIG_64BIT
+        for (i = 0; i < ARRAY_SIZE(order_comb_long); i++) {
+                if (order_comb_long[i][1] !=
+                               get_count_order_long(order_comb_long[i][0]))
+                        pr_warn("get_count_order_long wrong for %lx\n",
+                                       order_comb_long[i][0]);
+        }
+#endif
+
+        barrier();
+
+        clear_bit(BITOPS_4, g_bitmap);
+        clear_bit(BITOPS_7, g_bitmap);
+        clear_bit(BITOPS_11, g_bitmap);
+        clear_bit(BITOPS_31, g_bitmap);
+        clear_bit(BITOPS_88, g_bitmap);
+
+        bit_set = find_first_bit(g_bitmap, BITOPS_LAST);
+        if (bit_set != BITOPS_LAST)
+                pr_err("ERROR: FOUND SET BIT %d\n", bit_set);
+
+        pr_info("Completed bitops test\n");
+
+        return 0;
+}
+
+static void __exit test_bitops_unstartup(void)
+{
+}
+
+module_init(test_bitops_startup);
+module_exit(test_bitops_unstartup);
+
+MODULE_AUTHOR("Jesse Brandeburg <jesse.brandeburg@intel.com>, Wei Yang <richard.weiyang@gmail.com>");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Bit testing module");