VisionFive2 Linux kernel

c348c16305280 (Jesse Brandeburg   2020-06-04 16:50:27 -0700   1) // SPDX-License-Identifier: GPL-2.0-only
c348c16305280 (Jesse Brandeburg   2020-06-04 16:50:27 -0700   2) /*
c348c16305280 (Jesse Brandeburg   2020-06-04 16:50:27 -0700   3)  * Copyright (C) 2020 Intel Corporation
c348c16305280 (Jesse Brandeburg   2020-06-04 16:50:27 -0700   4)  */
c348c16305280 (Jesse Brandeburg   2020-06-04 16:50:27 -0700   5) 
c348c16305280 (Jesse Brandeburg   2020-06-04 16:50:27 -0700   6) #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
c348c16305280 (Jesse Brandeburg   2020-06-04 16:50:27 -0700   7) 
c348c16305280 (Jesse Brandeburg   2020-06-04 16:50:27 -0700   8) #include <linux/init.h>
c348c16305280 (Jesse Brandeburg   2020-06-04 16:50:27 -0700   9) #include <linux/module.h>
c348c16305280 (Jesse Brandeburg   2020-06-04 16:50:27 -0700  10) #include <linux/printk.h>
c348c16305280 (Jesse Brandeburg   2020-06-04 16:50:27 -0700  11) 
6af132f3a11e6 (Wei Yang           2020-06-10 18:41:53 -0700  12) /* a tiny module only meant to test
6af132f3a11e6 (Wei Yang           2020-06-10 18:41:53 -0700  13)  *
6af132f3a11e6 (Wei Yang           2020-06-10 18:41:53 -0700  14)  *   set/clear_bit
6af132f3a11e6 (Wei Yang           2020-06-10 18:41:53 -0700  15)  *   get_count_order/long
6af132f3a11e6 (Wei Yang           2020-06-10 18:41:53 -0700  16)  */
c348c16305280 (Jesse Brandeburg   2020-06-04 16:50:27 -0700  17) 
c348c16305280 (Jesse Brandeburg   2020-06-04 16:50:27 -0700  18) /* use an enum because thats the most common BITMAP usage */
c348c16305280 (Jesse Brandeburg   2020-06-04 16:50:27 -0700  19) enum bitops_fun {
c348c16305280 (Jesse Brandeburg   2020-06-04 16:50:27 -0700  20) 	BITOPS_4 = 4,
c348c16305280 (Jesse Brandeburg   2020-06-04 16:50:27 -0700  21) 	BITOPS_7 = 7,
c348c16305280 (Jesse Brandeburg   2020-06-04 16:50:27 -0700  22) 	BITOPS_11 = 11,
c348c16305280 (Jesse Brandeburg   2020-06-04 16:50:27 -0700  23) 	BITOPS_31 = 31,
c348c16305280 (Jesse Brandeburg   2020-06-04 16:50:27 -0700  24) 	BITOPS_88 = 88,
c348c16305280 (Jesse Brandeburg   2020-06-04 16:50:27 -0700  25) 	BITOPS_LAST = 255,
c348c16305280 (Jesse Brandeburg   2020-06-04 16:50:27 -0700  26) 	BITOPS_LENGTH = 256
c348c16305280 (Jesse Brandeburg   2020-06-04 16:50:27 -0700  27) };
c348c16305280 (Jesse Brandeburg   2020-06-04 16:50:27 -0700  28) 
c348c16305280 (Jesse Brandeburg   2020-06-04 16:50:27 -0700  29) static DECLARE_BITMAP(g_bitmap, BITOPS_LENGTH);
c348c16305280 (Jesse Brandeburg   2020-06-04 16:50:27 -0700  30) 
6af132f3a11e6 (Wei Yang           2020-06-10 18:41:53 -0700  31) static unsigned int order_comb[][2] = {
6af132f3a11e6 (Wei Yang           2020-06-10 18:41:53 -0700  32) 	{0x00000003,  2},
6af132f3a11e6 (Wei Yang           2020-06-10 18:41:53 -0700  33) 	{0x00000004,  2},
6af132f3a11e6 (Wei Yang           2020-06-10 18:41:53 -0700  34) 	{0x00001fff, 13},
6af132f3a11e6 (Wei Yang           2020-06-10 18:41:53 -0700  35) 	{0x00002000, 13},
6af132f3a11e6 (Wei Yang           2020-06-10 18:41:53 -0700  36) 	{0x50000000, 31},
6af132f3a11e6 (Wei Yang           2020-06-10 18:41:53 -0700  37) 	{0x80000000, 31},
6af132f3a11e6 (Wei Yang           2020-06-10 18:41:53 -0700  38) 	{0x80003000, 32},
6af132f3a11e6 (Wei Yang           2020-06-10 18:41:53 -0700  39) };
6af132f3a11e6 (Wei Yang           2020-06-10 18:41:53 -0700  40) 
6af132f3a11e6 (Wei Yang           2020-06-10 18:41:53 -0700  41) #ifdef CONFIG_64BIT
6af132f3a11e6 (Wei Yang           2020-06-10 18:41:53 -0700  42) static unsigned long order_comb_long[][2] = {
6af132f3a11e6 (Wei Yang           2020-06-10 18:41:53 -0700  43) 	{0x0000000300000000, 34},
6af132f3a11e6 (Wei Yang           2020-06-10 18:41:53 -0700  44) 	{0x0000000400000000, 34},
6af132f3a11e6 (Wei Yang           2020-06-10 18:41:53 -0700  45) 	{0x00001fff00000000, 45},
6af132f3a11e6 (Wei Yang           2020-06-10 18:41:53 -0700  46) 	{0x0000200000000000, 45},
6af132f3a11e6 (Wei Yang           2020-06-10 18:41:53 -0700  47) 	{0x5000000000000000, 63},
6af132f3a11e6 (Wei Yang           2020-06-10 18:41:53 -0700  48) 	{0x8000000000000000, 63},
6af132f3a11e6 (Wei Yang           2020-06-10 18:41:53 -0700  49) 	{0x8000300000000000, 64},
6af132f3a11e6 (Wei Yang           2020-06-10 18:41:53 -0700  50) };
6af132f3a11e6 (Wei Yang           2020-06-10 18:41:53 -0700  51) #endif
6af132f3a11e6 (Wei Yang           2020-06-10 18:41:53 -0700  52) 
c348c16305280 (Jesse Brandeburg   2020-06-04 16:50:27 -0700  53) static int __init test_bitops_startup(void)
c348c16305280 (Jesse Brandeburg   2020-06-04 16:50:27 -0700  54) {
403f177304354 (Geert Uytterhoeven 2020-08-11 18:34:38 -0700  55) 	int i, bit_set;
6af132f3a11e6 (Wei Yang           2020-06-10 18:41:53 -0700  56) 
403f177304354 (Geert Uytterhoeven 2020-08-11 18:34:38 -0700  57) 	pr_info("Starting bitops test\n");
c348c16305280 (Jesse Brandeburg   2020-06-04 16:50:27 -0700  58) 	set_bit(BITOPS_4, g_bitmap);
c348c16305280 (Jesse Brandeburg   2020-06-04 16:50:27 -0700  59) 	set_bit(BITOPS_7, g_bitmap);
c348c16305280 (Jesse Brandeburg   2020-06-04 16:50:27 -0700  60) 	set_bit(BITOPS_11, g_bitmap);
c348c16305280 (Jesse Brandeburg   2020-06-04 16:50:27 -0700  61) 	set_bit(BITOPS_31, g_bitmap);
c348c16305280 (Jesse Brandeburg   2020-06-04 16:50:27 -0700  62) 	set_bit(BITOPS_88, g_bitmap);
6af132f3a11e6 (Wei Yang           2020-06-10 18:41:53 -0700  63) 
6af132f3a11e6 (Wei Yang           2020-06-10 18:41:53 -0700  64) 	for (i = 0; i < ARRAY_SIZE(order_comb); i++) {
6af132f3a11e6 (Wei Yang           2020-06-10 18:41:53 -0700  65) 		if (order_comb[i][1] != get_count_order(order_comb[i][0]))
6af132f3a11e6 (Wei Yang           2020-06-10 18:41:53 -0700  66) 			pr_warn("get_count_order wrong for %x\n",
6af132f3a11e6 (Wei Yang           2020-06-10 18:41:53 -0700  67) 				       order_comb[i][0]);
6af132f3a11e6 (Wei Yang           2020-06-10 18:41:53 -0700  68) 	}
6af132f3a11e6 (Wei Yang           2020-06-10 18:41:53 -0700  69) 
6af132f3a11e6 (Wei Yang           2020-06-10 18:41:53 -0700  70) 	for (i = 0; i < ARRAY_SIZE(order_comb); i++) {
6af132f3a11e6 (Wei Yang           2020-06-10 18:41:53 -0700  71) 		if (order_comb[i][1] != get_count_order_long(order_comb[i][0]))
6af132f3a11e6 (Wei Yang           2020-06-10 18:41:53 -0700  72) 			pr_warn("get_count_order_long wrong for %x\n",
6af132f3a11e6 (Wei Yang           2020-06-10 18:41:53 -0700  73) 				       order_comb[i][0]);
6af132f3a11e6 (Wei Yang           2020-06-10 18:41:53 -0700  74) 	}
6af132f3a11e6 (Wei Yang           2020-06-10 18:41:53 -0700  75) 
6af132f3a11e6 (Wei Yang           2020-06-10 18:41:53 -0700  76) #ifdef CONFIG_64BIT
6af132f3a11e6 (Wei Yang           2020-06-10 18:41:53 -0700  77) 	for (i = 0; i < ARRAY_SIZE(order_comb_long); i++) {
6af132f3a11e6 (Wei Yang           2020-06-10 18:41:53 -0700  78) 		if (order_comb_long[i][1] !=
6af132f3a11e6 (Wei Yang           2020-06-10 18:41:53 -0700  79) 			       get_count_order_long(order_comb_long[i][0]))
6af132f3a11e6 (Wei Yang           2020-06-10 18:41:53 -0700  80) 			pr_warn("get_count_order_long wrong for %lx\n",
6af132f3a11e6 (Wei Yang           2020-06-10 18:41:53 -0700  81) 				       order_comb_long[i][0]);
6af132f3a11e6 (Wei Yang           2020-06-10 18:41:53 -0700  82) 	}
6af132f3a11e6 (Wei Yang           2020-06-10 18:41:53 -0700  83) #endif
c348c16305280 (Jesse Brandeburg   2020-06-04 16:50:27 -0700  84) 
403f177304354 (Geert Uytterhoeven 2020-08-11 18:34:38 -0700  85) 	barrier();
c348c16305280 (Jesse Brandeburg   2020-06-04 16:50:27 -0700  86) 
c348c16305280 (Jesse Brandeburg   2020-06-04 16:50:27 -0700  87) 	clear_bit(BITOPS_4, g_bitmap);
c348c16305280 (Jesse Brandeburg   2020-06-04 16:50:27 -0700  88) 	clear_bit(BITOPS_7, g_bitmap);
c348c16305280 (Jesse Brandeburg   2020-06-04 16:50:27 -0700  89) 	clear_bit(BITOPS_11, g_bitmap);
c348c16305280 (Jesse Brandeburg   2020-06-04 16:50:27 -0700  90) 	clear_bit(BITOPS_31, g_bitmap);
c348c16305280 (Jesse Brandeburg   2020-06-04 16:50:27 -0700  91) 	clear_bit(BITOPS_88, g_bitmap);
c348c16305280 (Jesse Brandeburg   2020-06-04 16:50:27 -0700  92) 
c348c16305280 (Jesse Brandeburg   2020-06-04 16:50:27 -0700  93) 	bit_set = find_first_bit(g_bitmap, BITOPS_LAST);
c348c16305280 (Jesse Brandeburg   2020-06-04 16:50:27 -0700  94) 	if (bit_set != BITOPS_LAST)
c348c16305280 (Jesse Brandeburg   2020-06-04 16:50:27 -0700  95) 		pr_err("ERROR: FOUND SET BIT %d\n", bit_set);
c348c16305280 (Jesse Brandeburg   2020-06-04 16:50:27 -0700  96) 
403f177304354 (Geert Uytterhoeven 2020-08-11 18:34:38 -0700  97) 	pr_info("Completed bitops test\n");
403f177304354 (Geert Uytterhoeven 2020-08-11 18:34:38 -0700  98) 
403f177304354 (Geert Uytterhoeven 2020-08-11 18:34:38 -0700  99) 	return 0;
403f177304354 (Geert Uytterhoeven 2020-08-11 18:34:38 -0700 100) }
403f177304354 (Geert Uytterhoeven 2020-08-11 18:34:38 -0700 101) 
403f177304354 (Geert Uytterhoeven 2020-08-11 18:34:38 -0700 102) static void __exit test_bitops_unstartup(void)
403f177304354 (Geert Uytterhoeven 2020-08-11 18:34:38 -0700 103) {
c348c16305280 (Jesse Brandeburg   2020-06-04 16:50:27 -0700 104) }
c348c16305280 (Jesse Brandeburg   2020-06-04 16:50:27 -0700 105) 
c348c16305280 (Jesse Brandeburg   2020-06-04 16:50:27 -0700 106) module_init(test_bitops_startup);
c348c16305280 (Jesse Brandeburg   2020-06-04 16:50:27 -0700 107) module_exit(test_bitops_unstartup);
c348c16305280 (Jesse Brandeburg   2020-06-04 16:50:27 -0700 108) 
6af132f3a11e6 (Wei Yang           2020-06-10 18:41:53 -0700 109) MODULE_AUTHOR("Jesse Brandeburg <jesse.brandeburg@intel.com>, Wei Yang <richard.weiyang@gmail.com>");
c348c16305280 (Jesse Brandeburg   2020-06-04 16:50:27 -0700 110) MODULE_LICENSE("GPL");
c348c16305280 (Jesse Brandeburg   2020-06-04 16:50:27 -0700 111) MODULE_DESCRIPTION("Bit testing module");