}
#endif
+int fdtdec_set_phandle(void *blob, int node, uint32_t phandle)
+{
+ fdt32_t value = cpu_to_fdt32(phandle);
+
+ return fdt_setprop(blob, node, "phandle", &value, sizeof(value));
+}
+
+static int fdtdec_init_reserved_memory(void *blob)
+{
+ int na, ns, node, err;
+ fdt32_t value;
+
+ /* inherit #address-cells and #size-cells from the root node */
+ na = fdt_address_cells(blob, 0);
+ ns = fdt_size_cells(blob, 0);
+
+ node = fdt_add_subnode(blob, 0, "reserved-memory");
+ if (node < 0)
+ return node;
+
+ err = fdt_setprop(blob, node, "ranges", NULL, 0);
+ if (err < 0)
+ return err;
+
+ value = cpu_to_fdt32(ns);
+
+ err = fdt_setprop(blob, node, "#size-cells", &value, sizeof(value));
+ if (err < 0)
+ return err;
+
+ value = cpu_to_fdt32(na);
+
+ err = fdt_setprop(blob, node, "#address-cells", &value, sizeof(value));
+ if (err < 0)
+ return err;
+
+ return node;
+}
+
+int fdtdec_add_reserved_memory(void *blob, const char *basename,
+ const struct fdt_memory *carveout,
+ uint32_t *phandlep)
+{
+ fdt32_t cells[4] = {}, *ptr = cells;
+ uint32_t upper, lower, phandle;
+ int parent, node, na, ns, err;
+ char name[64];
+
+ /* create an empty /reserved-memory node if one doesn't exist */
+ parent = fdt_path_offset(blob, "/reserved-memory");
+ if (parent < 0) {
+ parent = fdtdec_init_reserved_memory(blob);
+ if (parent < 0)
+ return parent;
+ }
+
+ /* only 1 or 2 #address-cells and #size-cells are supported */
+ na = fdt_address_cells(blob, parent);
+ if (na < 1 || na > 2)
+ return -FDT_ERR_BADNCELLS;
+
+ ns = fdt_size_cells(blob, parent);
+ if (ns < 1 || ns > 2)
+ return -FDT_ERR_BADNCELLS;
+
+ /* find a matching node and return the phandle to that */
+ fdt_for_each_subnode(node, blob, parent) {
+ const char *name = fdt_get_name(blob, node, NULL);
+ phys_addr_t addr, size;
+
+ addr = fdtdec_get_addr_size(blob, node, "reg", &size);
+ if (addr == FDT_ADDR_T_NONE) {
+ debug("failed to read address/size for %s\n", name);
+ continue;
+ }
+
+ if (addr == carveout->start && (addr + size) == carveout->end) {
+ *phandlep = fdt_get_phandle(blob, node);
+ return 0;
+ }
+ }
+
+ /*
+ * Unpack the start address and generate the name of the new node
+ * base on the basename and the unit-address.
+ */
+ lower = fdt_addr_unpack(carveout->start, &upper);
+
+ if (na > 1 && upper > 0)
+ snprintf(name, sizeof(name), "%s@%x,%x", basename, upper,
+ lower);
+ else {
+ if (upper > 0) {
+ debug("address %08x:%08x exceeds addressable space\n",
+ upper, lower);
+ return -FDT_ERR_BADVALUE;
+ }
+
+ snprintf(name, sizeof(name), "%s@%x", basename, lower);
+ }
+
+ node = fdt_add_subnode(blob, parent, name);
+ if (node < 0)
+ return node;
+
+ err = fdt_generate_phandle(blob, &phandle);
+ if (err < 0)
+ return err;
+
+ err = fdtdec_set_phandle(blob, node, phandle);
+ if (err < 0)
+ return err;
+
+ /* store one or two address cells */
+ if (na > 1)
+ *ptr++ = cpu_to_fdt32(upper);
+
+ *ptr++ = cpu_to_fdt32(lower);
+
+ /* store one or two size cells */
+ lower = fdt_size_unpack(carveout->end - carveout->start + 1, &upper);
+
+ if (ns > 1)
+ *ptr++ = cpu_to_fdt32(upper);
+
+ *ptr++ = cpu_to_fdt32(lower);
+
+ err = fdt_setprop(blob, node, "reg", cells, (na + ns) * sizeof(*cells));
+ if (err < 0)
+ return err;
+
+ /* return the phandle for the new node for the caller to use */
+ if (phandlep)
+ *phandlep = phandle;
+
+ return 0;
+}
+
+int fdtdec_get_carveout(const void *blob, const char *node, const char *name,
+ unsigned int index, struct fdt_memory *carveout)
+{
+ const fdt32_t *prop;
+ uint32_t phandle;
+ int offset, len;
+ fdt_size_t size;
+
+ offset = fdt_path_offset(blob, node);
+ if (offset < 0)
+ return offset;
+
+ prop = fdt_getprop(blob, offset, name, &len);
+ if (!prop) {
+ debug("failed to get %s for %s\n", name, node);
+ return -FDT_ERR_NOTFOUND;
+ }
+
+ if ((len % sizeof(phandle)) != 0) {
+ debug("invalid phandle property\n");
+ return -FDT_ERR_BADPHANDLE;
+ }
+
+ if (len < (sizeof(phandle) * (index + 1))) {
+ debug("invalid phandle index\n");
+ return -FDT_ERR_BADPHANDLE;
+ }
+
+ phandle = fdt32_to_cpu(prop[index]);
+
+ offset = fdt_node_offset_by_phandle(blob, phandle);
+ if (offset < 0) {
+ debug("failed to find node for phandle %u\n", phandle);
+ return offset;
+ }
+
+ carveout->start = fdtdec_get_addr_size_auto_noparent(blob, offset,
+ "reg", 0, &size,
+ true);
+ if (carveout->start == FDT_ADDR_T_NONE) {
+ debug("failed to read address/size from \"reg\" property\n");
+ return -FDT_ERR_NOTFOUND;
+ }
+
+ carveout->end = carveout->start + size - 1;
+
+ return 0;
+}
+
+int fdtdec_set_carveout(void *blob, const char *node, const char *prop_name,
+ unsigned int index, const char *name,
+ const struct fdt_memory *carveout)
+{
+ uint32_t phandle;
+ int err, offset;
+ fdt32_t value;
+
+ /* XXX implement support for multiple phandles */
+ if (index > 0) {
+ debug("invalid index %u\n", index);
+ return -FDT_ERR_BADOFFSET;
+ }
+
+ err = fdtdec_add_reserved_memory(blob, name, carveout, &phandle);
+ if (err < 0) {
+ debug("failed to add reserved memory: %d\n", err);
+ return err;
+ }
+
+ offset = fdt_path_offset(blob, node);
+ if (offset < 0) {
+ debug("failed to find offset for node %s: %d\n", node, offset);
+ return offset;
+ }
+
+ value = cpu_to_fdt32(phandle);
+
+ err = fdt_setprop(blob, offset, prop_name, &value, sizeof(value));
+ if (err < 0) {
+ debug("failed to set %s property for node %s: %d\n", prop_name,
+ node, err);
+ return err;
+ }
+
+ return 0;
+}
+
int fdtdec_setup(void)
{
#if CONFIG_IS_ENABLED(OF_CONTROL)
projects / thirdparty / u-boot.git / blobdiff