*/
typedef phys_addr_t fdt_addr_t;
typedef phys_size_t fdt_size_t;
+
+static inline fdt32_t fdt_addr_unpack(fdt_addr_t addr, fdt32_t *upper)
+{
+ if (upper)
+#ifdef CONFIG_PHYS_64BIT
+ *upper = addr >> 32;
+#else
+ *upper = 0;
+#endif
+
+ return addr;
+}
+
+static inline fdt32_t fdt_size_unpack(fdt_size_t size, fdt32_t *upper)
+{
+ if (upper)
+#ifdef CONFIG_PHYS_64BIT
+ *upper = size >> 32;
+#else
+ *upper = 0;
+#endif
+
+ return size;
+}
+
#ifdef CONFIG_PHYS_64BIT
#define FDT_ADDR_T_NONE (-1U)
#define fdt_addr_to_cpu(reg) be64_to_cpu(reg)
int fdtdec_setup_memory_banksize(void);
/**
+ * fdtdec_set_phandle() - sets the phandle of a given node
+ *
+ * @param blob FDT blob
+ * @param node offset in the FDT blob of the node whose phandle is to
+ * be set
+ * @param phandle phandle to set for the given node
+ * @return 0 on success or a negative error code on failure
+ */
+static inline int fdtdec_set_phandle(void *blob, int node, uint32_t phandle)
+{
+ return fdt_setprop_u32(blob, node, "phandle", phandle);
+}
+
+/**
+ * fdtdec_add_reserved_memory() - add or find a reserved-memory node
+ *
+ * If a reserved-memory node already exists for the given carveout, a phandle
+ * for that node will be returned. Otherwise a new node will be created and a
+ * phandle corresponding to it will be returned.
+ *
+ * See Documentation/devicetree/bindings/reserved-memory/reserved-memory.txt
+ * for details on how to use reserved memory regions.
+ *
+ * As an example, consider the following code snippet:
+ *
+ * struct fdt_memory fb = {
+ * .start = 0x92cb3000,
+ * .end = 0x934b2fff,
+ * };
+ * uint32_t phandle;
+ *
+ * fdtdec_add_reserved_memory(fdt, "framebuffer", &fb, &phandle);
+ *
+ * This results in the following subnode being added to the top-level
+ * /reserved-memory node:
+ *
+ * reserved-memory {
+ * #address-cells = <0x00000002>;
+ * #size-cells = <0x00000002>;
+ * ranges;
+ *
+ * framebuffer@92cb3000 {
+ * reg = <0x00000000 0x92cb3000 0x00000000 0x00800000>;
+ * phandle = <0x0000004d>;
+ * };
+ * };
+ *
+ * If the top-level /reserved-memory node does not exist, it will be created.
+ * The phandle returned from the function call can be used to reference this
+ * reserved memory region from other nodes.
+ *
+ * See fdtdec_set_carveout() for a more elaborate example.
+ *
+ * @param blob FDT blob
+ * @param basename base name of the node to create
+ * @param carveout information about the carveout region
+ * @param phandlep return location for the phandle of the carveout region
+ * @return 0 on success or a negative error code on failure
+ */
+int fdtdec_add_reserved_memory(void *blob, const char *basename,
+ const struct fdt_memory *carveout,
+ uint32_t *phandlep);
+
+/**
+ * fdtdec_get_carveout() - reads a carveout from an FDT
+ *
+ * Reads information about a carveout region from an FDT. The carveout is a
+ * referenced by its phandle that is read from a given property in a given
+ * node.
+ *
+ * @param blob FDT blob
+ * @param node name of a node
+ * @param name name of the property in the given node that contains
+ * the phandle for the carveout
+ * @param index index of the phandle for which to read the carveout
+ * @param carveout return location for the carveout information
+ * @return 0 on success or a negative error code on failure
+ */
+int fdtdec_get_carveout(const void *blob, const char *node, const char *name,
+ unsigned int index, struct fdt_memory *carveout);
+
+/**
+ * fdtdec_set_carveout() - sets a carveout region for a given node
+ *
+ * Sets a carveout region for a given node. If a reserved-memory node already
+ * exists for the carveout, the phandle for that node will be reused. If no
+ * such node exists, a new one will be created and a phandle to it stored in
+ * a specified property of the given node.
+ *
+ * As an example, consider the following code snippet:
+ *
+ * const char *node = "/host1x@50000000/dc@54240000";
+ * struct fdt_memory fb = {
+ * .start = 0x92cb3000,
+ * .end = 0x934b2fff,
+ * };
+ *
+ * fdtdec_set_carveout(fdt, node, "memory-region", 0, "framebuffer", &fb);
+ *
+ * dc@54200000 is a display controller and was set up by the bootloader to
+ * scan out the framebuffer specified by "fb". This would cause the following
+ * reserved memory region to be added:
+ *
+ * reserved-memory {
+ * #address-cells = <0x00000002>;
+ * #size-cells = <0x00000002>;
+ * ranges;
+ *
+ * framebuffer@92cb3000 {
+ * reg = <0x00000000 0x92cb3000 0x00000000 0x00800000>;
+ * phandle = <0x0000004d>;
+ * };
+ * };
+ *
+ * A "memory-region" property will also be added to the node referenced by the
+ * offset parameter.
+ *
+ * host1x@50000000 {
+ * ...
+ *
+ * dc@54240000 {
+ * ...
+ * memory-region = <0x0000004d>;
+ * ...
+ * };
+ *
+ * ...
+ * };
+ *
+ * @param blob FDT blob
+ * @param node name of the node to add the carveout to
+ * @param prop_name name of the property in which to store the phandle of
+ * the carveout
+ * @param index index of the phandle to store
+ * @param name base name of the reserved-memory node to create
+ * @param carveout information about the carveout to add
+ * @return 0 on success or a negative error code on failure
+ */
+int fdtdec_set_carveout(void *blob, const char *node, const char *prop_name,
+ unsigned int index, const char *name,
+ const struct fdt_memory *carveout);
+
+/**
* Set up the device tree ready for use
*/
int fdtdec_setup(void);
projects / platform / kernel / u-boot.git / blobdiff