test/dm/fdtdec.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright 2020 NXP
   4  */
   5
   6 #include <common.h>
   7 #include <dm.h>
   8 #include <asm/global_data.h>
   9 #include <dm/of_extra.h>
  10 #include <dm/test.h>
  11 #include <test/ut.h>
  12
  13 DECLARE_GLOBAL_DATA_PTR;
  14
  15 static int dm_test_fdtdec_set_carveout(struct unit_test_state *uts)
  16 {
  17         struct fdt_memory resv;
  18         void *blob;
  19         const fdt32_t *prop;
  20         int blob_sz, len, offset;
  21
  22         blob_sz = fdt_totalsize(gd->fdt_blob) + 4096;
  23         blob = malloc(blob_sz);
  24         ut_assertnonnull(blob);
  25
  26         /* Make a writable copy of the fdt blob */
  27         ut_assertok(fdt_open_into(gd->fdt_blob, blob, blob_sz));
  28
  29         resv.start = 0x1000;
  30         resv.end = 0x2000;
  31         ut_assertok(fdtdec_set_carveout(blob, "/a-test",
  32                                         "memory-region", 2, "test_resv1",
  33                                         &resv));
  34
  35         resv.start = 0x10000;
  36         resv.end = 0x20000;
  37         ut_assertok(fdtdec_set_carveout(blob, "/a-test",
  38                                         "memory-region", 1, "test_resv2",
  39                                         &resv));
  40
  41         resv.start = 0x100000;
  42         resv.end = 0x200000;
  43         ut_assertok(fdtdec_set_carveout(blob, "/a-test",
  44                                         "memory-region", 0, "test_resv3",
  45                                         &resv));
  46
  47         offset = fdt_path_offset(blob, "/a-test");
  48         ut_assert(offset > 0);
  49         prop = fdt_getprop(blob, offset, "memory-region", &len);
  50         ut_assertnonnull(prop);
  51
  52         ut_asserteq(len, 12);
  53         ut_assert(fdt_node_offset_by_phandle(blob, fdt32_to_cpu(prop[0])) > 0);
  54         ut_assert(fdt_node_offset_by_phandle(blob, fdt32_to_cpu(prop[1])) > 0);
  55         ut_assert(fdt_node_offset_by_phandle(blob, fdt32_to_cpu(prop[2])) > 0);
  56
  57         free(blob);
  58
  59         return 0;
  60 }
  61 DM_TEST(dm_test_fdtdec_set_carveout,
  62         UT_TESTF_SCAN_PDATA | UT_TESTF_SCAN_FDT | UT_TESTF_FLAT_TREE);
  63
  64 static int dm_test_fdtdec_add_reserved_memory(struct unit_test_state *uts)
  65 {
  66         struct fdt_memory resv;
  67         fdt_addr_t addr;
  68         fdt_size_t size;
  69         void *blob;
  70         int blob_sz, parent, subnode;
  71         uint32_t phandle, phandle1;
  72
  73         blob_sz = fdt_totalsize(gd->fdt_blob) + 128;
  74         blob = malloc(blob_sz);
  75         ut_assertnonnull(blob);
  76
  77         /* Make a writable copy of the fdt blob */
  78         ut_assertok(fdt_open_into(gd->fdt_blob, blob, blob_sz));
  79
  80         /* Insert a memory region in /reserved-memory node */
  81         resv.start = 0x1000;
  82         resv.end = 0x1fff;
  83         ut_assertok(fdtdec_add_reserved_memory(blob, "rsvd_region",
  84                                                &resv, &phandle, false));
  85
  86         /* Test /reserve-memory and its subnode should exist */
  87         parent = fdt_path_offset(blob, "/reserved-memory");
  88         ut_assert(parent > 0);
  89         subnode = fdt_path_offset(blob, "/reserved-memory/rsvd_region");
  90         ut_assert(subnode > 0);
  91
  92         /* Test reg property of /reserved-memory/rsvd_region node */
  93         addr = fdtdec_get_addr_size_auto_parent(blob, parent, subnode,
  94                                                 "reg", 0, &size, false);
  95         ut_assert(addr == resv.start);
  96         ut_assert(size == resv.end -  resv.start + 1);
  97
  98         /* Insert another memory region in /reserved-memory node */
  99         subnode = fdt_path_offset(blob, "/reserved-memory/rsvd_region1");
 100         ut_assert(subnode < 0);
 101
 102         resv.start = 0x2000;
 103         resv.end = 0x2fff;
 104         ut_assertok(fdtdec_add_reserved_memory(blob, "rsvd_region1",
 105                                                &resv, &phandle1, true));
 106         subnode = fdt_path_offset(blob, "/reserved-memory/rsvd_region1");
 107         ut_assert(subnode > 0);
 108
 109         /* check that no-map property is present */
 110         ut_assert(fdt_getprop(blob, subnode, "no-map", NULL) > 0);
 111
 112         /* phandles must be different */
 113         ut_assert(phandle != phandle1);
 114
 115         /*
 116          * Insert a 3rd memory region with the same addr/size as the 1st one,
 117          * but a new node should not be inserted due to the same addr/size.
 118          */
 119         resv.start = 0x1000;
 120         resv.end = 0x1fff;
 121         ut_assertok(fdtdec_add_reserved_memory(blob, "rsvd_region2",
 122                                                &resv, &phandle1, false));
 123         subnode = fdt_path_offset(blob, "/reserved-memory/rsvd_region2");
 124         ut_assert(subnode < 0);
 125
 126         /* phandle must be same as the 1st one */
 127         ut_assert(phandle == phandle1);
 128
 129         free(blob);
 130
 131         return 0;
 132 }
 133 DM_TEST(dm_test_fdtdec_add_reserved_memory,
 134         UT_TESTF_SCAN_PDATA | UT_TESTF_SCAN_FDT | UT_TESTF_FLAT_TREE);