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// SPDX-License-Identifier: LGPL-2.1-or-later
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/*
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* libfdt - Flat Device Tree manipulation
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* Testcase for DT overlays()
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* Copyright (C) 2016 Free Electrons
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* Copyright (C) 2016 NextThing Co.
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*/
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#include <stdio.h>
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#include <libfdt.h>
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#include "tests.h"
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#define CHECK(code) \
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{ \
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int err = (code); \
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if (err) \
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FAIL(#code ": %s", fdt_strerror(err)); \
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}
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/* 4k ought to be enough for anybody */
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#define FDT_COPY_SIZE (4 * 1024)
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static int fdt_getprop_u32_by_poffset(void *fdt, const char *path,
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const char *name, int poffset,
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unsigned long *out)
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{
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const fdt32_t *val;
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int node_off;
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int len;
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node_off = fdt_path_offset(fdt, path);
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if (node_off < 0)
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return node_off;
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val = fdt_getprop(fdt, node_off, name, &len;;
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if (!val || (len < (sizeof(uint32_t) * (poffset + 1))))
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return -FDT_ERR_NOTFOUND;
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*out = fdt32_to_cpu(*(val + poffset));
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return 0;
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}
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static int check_getprop_string_by_name(void *fdt, const char *path,
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const char *name, const char *val)
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{
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int node_off;
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node_off = fdt_path_offset(fdt, path);
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if (node_off < 0)
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return node_off;
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check_getprop_string(fdt, node_off, name, val);
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return 0;
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}
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static int check_getprop_u32_by_name(void *fdt, const char *path,
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const char *name, uint32_t val)
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{
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int node_off;
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node_off = fdt_path_offset(fdt, path);
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CHECK(node_off < 0);
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check_getprop_cell(fdt, node_off, name, val);
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return 0;
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}
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static int check_getprop_null_by_name(void *fdt, const char *path,
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const char *name)
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{
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int node_off;
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node_off = fdt_path_offset(fdt, path);
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CHECK(node_off < 0);
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check_property(fdt, node_off, name, 0, NULL);
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return 0;
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}
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static int fdt_overlay_change_int_property(void *fdt)
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{
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return check_getprop_u32_by_name(fdt, "/test-node", "test-int-property",
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43);
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}
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static int fdt_overlay_change_str_property(void *fdt)
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{
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return check_getprop_string_by_name(fdt, "/test-node",
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"test-str-property", "foobar");
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}
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static int fdt_overlay_add_str_property(void *fdt)
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{
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return check_getprop_string_by_name(fdt, "/test-node",
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"test-str-property-2", "foobar2");
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}
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static int fdt_overlay_add_node(void *fdt)
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{
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return check_getprop_null_by_name(fdt, "/test-node/new-node",
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"new-property");
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}
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static int fdt_overlay_add_subnode_property(void *fdt)
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{
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check_getprop_null_by_name(fdt, "/test-node/sub-test-node",
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"sub-test-property");
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check_getprop_null_by_name(fdt, "/test-node/sub-test-node",
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"new-sub-test-property");
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return 0;
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}
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static int fdt_overlay_local_phandle(void *fdt)
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{
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uint32_t local_phandle;
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unsigned long val = 0;
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int off;
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off = fdt_path_offset(fdt, "/test-node/new-local-node");
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CHECK(off < 0);
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local_phandle = fdt_get_phandle(fdt, off);
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CHECK(!local_phandle);
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CHECK(fdt_getprop_u32_by_poffset(fdt, "/test-node",
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"test-several-phandle",
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0, &val));
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CHECK(val != local_phandle);
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CHECK(fdt_getprop_u32_by_poffset(fdt, "/test-node",
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"test-several-phandle",
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1, &val));
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CHECK(val != local_phandle);
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return 0;
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}
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static int fdt_overlay_local_phandles(void *fdt)
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{
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uint32_t local_phandle, test_phandle;
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unsigned long val = 0;
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int off;
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off = fdt_path_offset(fdt, "/test-node/new-local-node");
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CHECK(off < 0);
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local_phandle = fdt_get_phandle(fdt, off);
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CHECK(!local_phandle);
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off = fdt_path_offset(fdt, "/test-node");
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CHECK(off < 0);
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test_phandle = fdt_get_phandle(fdt, off);
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CHECK(!test_phandle);
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CHECK(fdt_getprop_u32_by_poffset(fdt, "/test-node",
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"test-phandle", 0, &val));
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CHECK(test_phandle != val);
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CHECK(fdt_getprop_u32_by_poffset(fdt, "/test-node",
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"test-phandle", 1, &val));
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CHECK(local_phandle != val);
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return 0;
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}
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static void *open_dt(char *path)
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{
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void *dt, *copy;
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dt = load_blob(path);
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copy = xmalloc(FDT_COPY_SIZE);
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/*
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* Resize our DTs to 4k so that we have room to operate on
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*/
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CHECK(fdt_open_into(dt, copy, FDT_COPY_SIZE));
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return copy;
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}
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int main(int argc, char *argv[])
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{
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void *fdt_base, *fdt_overlay;
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test_init(argc, argv);
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if (argc != 3)
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CONFIG("Usage: %s <base dtb> <overlay dtb>", argv[0]);
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fdt_base = open_dt(argv[1]);
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fdt_overlay = open_dt(argv[2]);
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/* Apply the overlay */
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CHECK(fdt_overlay_apply(fdt_base, fdt_overlay));
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fdt_overlay_change_int_property(fdt_base);
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fdt_overlay_change_str_property(fdt_base);
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fdt_overlay_add_str_property(fdt_base);
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fdt_overlay_add_node(fdt_base);
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fdt_overlay_add_subnode_property(fdt_base);
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/*
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* If the base tree has a __symbols__ node, do the tests that
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* are only successful with a proper phandle support, and thus
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* dtc -@
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*/
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if (fdt_path_offset(fdt_base, "/__symbols__") >= 0) {
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fdt_overlay_local_phandle(fdt_base);
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fdt_overlay_local_phandles(fdt_base);
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}
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PASS();
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}
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