tests/commonlib/device_tree-test.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <commonlib/device_tree.h>
   4 #include <console/console.h>
   5 #include <helpers/file.h>
   6 #include <stddef.h>
   7 #include <stdint.h>
   8 #include <stdio.h>
   9 #include <stdlib.h>
  10 #include <string.h>
  11 #include <tests/test.h>
  12
  13 static int setup_device_tree_test_group(void **state)
  14 {
  15         /*
  16          * fattest FDT I could find from Linux Kernel to test the worst cases
  17          * https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/arch/arm/boot/dts/nvidia/tegra30-ouya.dts?id=443b349019f2d946
  18          */
  19         const char dtb_path[] = "lib/devicetree-test/tegra30-ouya.dtb";
  20         int file_size = test_get_file_size(dtb_path);
  21         assert_int_not_equal(file_size, -1);
  22
  23         void *big_fat_dtb = test_malloc(file_size);
  24         assert_int_not_equal(big_fat_dtb, NULL);
  25         assert_int_equal(test_read_file(dtb_path, big_fat_dtb, file_size), file_size);
  26         *state = big_fat_dtb;
  27
  28         return 0;
  29 }
  30
  31 static int teardown_device_tree_test_group(void **state)
  32 {
  33         test_free(*state);
  34         return 0;
  35 }
  36
  37 static void test_fdt_find_node_by_path(void **state)
  38 {
  39         uint32_t addrcp, sizecp;
  40         assert_int_equal(0, fdt_find_node_by_path(*state, "test", &addrcp, &sizecp));
  41         assert_int_equal(56, fdt_find_node_by_path(*state, "/", &addrcp, &sizecp));
  42         assert_int_equal(2, addrcp);
  43         assert_int_equal(1, sizecp);
  44         assert_int_equal(0, fdt_find_node_by_path(*state, "/test", &addrcp, &sizecp));
  45         assert_int_equal(0x181f4, fdt_find_node_by_path(*state, "/chosen", &addrcp, &sizecp));
  46         assert_int_equal(1, addrcp);
  47         assert_int_equal(1, sizecp);
  48         assert_int_equal(0x156d4, fdt_find_node_by_path(*state, "/cpus", &addrcp, &sizecp));
  49         assert_int_equal(1, addrcp);
  50         assert_int_equal(1, sizecp);
  51         assert_int_equal(0x1517c, fdt_find_node_by_path(*state, "/usb@7d004000/ethernet@2", &addrcp, &sizecp));
  52         assert_int_equal(1, addrcp);
  53         assert_int_equal(0, sizecp);
  54         assert_int_equal(0x1517c, fdt_find_node_by_path(*state, "/usb@7d004000/ethernet@2/", &addrcp, &sizecp));
  55         assert_int_equal(1, addrcp);
  56         assert_int_equal(0, sizecp);
  57
  58         assert_int_equal(0xee08, fdt_find_node_by_path(*state, "/pinmux@70000868/pinmux/drive_groups",
  59                                                        &addrcp, &sizecp));
  60 }
  61
  62 static void test_fdt_find_subnodes_by_prefix(void **state)
  63 {
  64         uint32_t offset = fdt_find_node_by_path(*state, "/cpus", NULL, NULL);
  65         uint32_t results[3] = { 0 };
  66         uint32_t addrcp, sizecp;
  67         size_t count_results = fdt_find_subnodes_by_prefix(*state, offset, "cpu@",
  68                                                            &addrcp, &sizecp, results, 3);
  69         assert_int_equal(3, count_results);
  70         assert_int_equal(0x15700, results[0]);
  71         assert_int_equal(0x157a0, results[1]);
  72         assert_int_equal(0x15840, results[2]);
  73
  74         results[1] = 0xDEADBEEF;
  75         results[2] = 0xDEADBEEF;
  76         count_results = fdt_find_subnodes_by_prefix(*state, offset, "cpu@",
  77                                                            &addrcp, &sizecp, results, 1);
  78         assert_int_equal(1, count_results);
  79         assert_int_equal(0x15700, results[0]);
  80         assert_int_equal(0xDEADBEEF, results[1]);
  81         assert_int_equal(0xDEADBEEF, results[2]);
  82 }
  83
  84 static void test_fdt_find_node_by_alias(void **state)
  85 {
  86         assert_int_equal(0xf298, fdt_find_node_by_alias(*state, "serial0", NULL, NULL));
  87         assert_int_equal(0, fdt_find_node_by_alias(*state, "mmc2", NULL, NULL));
  88 }
  89
  90 static void test_fdt_find_prop_in_node(void **state)
  91 {
  92         uintptr_t cnode_offset = fdt_find_node_by_path(*state, "/clock", NULL, NULL);
  93         uintptr_t mnode_offset = fdt_find_node_by_path(*state, "/memory@80000000", NULL, NULL);
  94         assert_int_equal(0x18400, cnode_offset);
  95
  96         struct fdt_property fdt_prop;
  97         assert_int_equal(0x1840c, fdt_read_prop(*state, cnode_offset, "compatible", &fdt_prop));
  98         assert_string_equal("fixed-clock", (char *)fdt_prop.data);
  99         assert_int_equal(0x6094, fdt_read_prop(*state, mnode_offset, "reg", &fdt_prop));
 100         assert_int_equal(0x0, fdt_read_prop(*state, cnode_offset, "notfound", &fdt_prop));
 101 }
 102
 103 static void test_fdt_read_reg_prop(void **state)
 104 {
 105         uint32_t addrcp1, sizecp1, addrcp2, sizecp2;
 106         uint64_t node_offset1 = fdt_find_node_by_path(*state, "/memory@80000000", &addrcp1, &sizecp1);
 107         uint64_t node_offset2 = fdt_find_node_by_path(*state, "/reserved-memory/ramoops@bfdf0000", &addrcp2, &sizecp2);
 108
 109         struct device_tree_region regions[3];
 110         regions[0].addr = 0xDEADBEEF;
 111         regions[0].size = 0xDEADBEEF;
 112         fdt_read_reg_prop(*state, node_offset1, addrcp1, sizecp1, regions, 0);
 113         assert_int_equal(0xDEADBEEF, regions[0].addr);
 114         assert_int_equal(0xDEADBEEF, regions[0].size);
 115         fdt_read_reg_prop(*state, node_offset2, addrcp2, sizecp2, regions, 1);
 116         assert_int_equal(0xbfdf0000, regions[0].addr);
 117         assert_int_equal(0x00010000, regions[0].size);
 118 }
 119
 120 int main(void)
 121 {
 122         const struct CMUnitTest tests[] = {
 123                 cmocka_unit_test(test_fdt_find_node_by_path),
 124                 cmocka_unit_test(test_fdt_find_subnodes_by_prefix),
 125                 cmocka_unit_test(test_fdt_find_node_by_alias),
 126                 cmocka_unit_test(test_fdt_find_prop_in_node),
 127                 cmocka_unit_test(test_fdt_read_reg_prop),
 128         };
 129
 130         return cb_run_group_tests(tests, setup_device_tree_test_group,
 131                         teardown_device_tree_test_group);
 132 }