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common/fdt_support.c
36.5 KB
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/* * (C) Copyright 2007 * Gerald Van Baren, Custom IDEAS, vanbaren@cideas.com * |
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* Copyright 2010-2011 Freescale Semiconductor, Inc. |
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* |
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* SPDX-License-Identifier: GPL-2.0+ |
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*/ #include <common.h> |
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#include <stdio_dev.h> |
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#include <linux/ctype.h> #include <linux/types.h> |
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#include <asm/global_data.h> |
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#include <libfdt.h> #include <fdt_support.h> |
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#include <exports.h> |
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/* |
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* Get cells len in bytes * if #NNNN-cells property is 2 then len is 8 * otherwise len is 4 */ |
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static int get_cells_len(const void *fdt, const char *nr_cells_name) |
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{ const fdt32_t *cell; |
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cell = fdt_getprop(fdt, 0, nr_cells_name, NULL); |
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if (cell && fdt32_to_cpu(*cell) == 2) return 8; return 4; } |
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/** |
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* fdt_getprop_u32_default_node - Return a node's property or a default * * @fdt: ptr to device tree * @off: offset of node * @cell: cell offset in property * @prop: property name * @dflt: default value if the property isn't found * * Convenience function to return a node's property or a default value if * the property doesn't exist. */ u32 fdt_getprop_u32_default_node(const void *fdt, int off, int cell, const char *prop, const u32 dflt) { const fdt32_t *val; int len; val = fdt_getprop(fdt, off, prop, &len); /* Check if property exists */ if (!val) return dflt; /* Check if property is long enough */ if (len < ((cell + 1) * sizeof(uint32_t))) return dflt; return fdt32_to_cpu(*val); } /** |
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* fdt_getprop_u32_default - Find a node and return it's property or a default * * @fdt: ptr to device tree * @path: path of node * @prop: property name * @dflt: default value if the property isn't found * * Convenience function to find a node and return it's property or a * default value if it doesn't exist. */ |
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u32 fdt_getprop_u32_default(const void *fdt, const char *path, const char *prop, const u32 dflt) |
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{ |
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int off; off = fdt_path_offset(fdt, path); if (off < 0) return dflt; |
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return fdt_getprop_u32_default_node(fdt, off, 0, prop, dflt); |
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} |
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/** * fdt_find_and_setprop: Find a node and set it's property * * @fdt: ptr to device tree * @node: path of node * @prop: property name * @val: ptr to new value * @len: length of new property value * @create: flag to create the property if it doesn't exist * * Convenience function to directly set a property given the path to the node. */ int fdt_find_and_setprop(void *fdt, const char *node, const char *prop, const void *val, int len, int create) { |
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int nodeoff = fdt_path_offset(fdt, node); |
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if (nodeoff < 0) return nodeoff; |
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if ((!create) && (fdt_get_property(fdt, nodeoff, prop, NULL) == NULL)) |
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return 0; /* create flag not set; so exit quietly */ return fdt_setprop(fdt, nodeoff, prop, val, len); } |
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/** * fdt_find_or_add_subnode - find or possibly add a subnode of a given node * @fdt: pointer to the device tree blob * @parentoffset: structure block offset of a node * @name: name of the subnode to locate * * fdt_subnode_offset() finds a subnode of the node with a given name. * If the subnode does not exist, it will be created. */ static int fdt_find_or_add_subnode(void *fdt, int parentoffset, const char *name) { int offset; offset = fdt_subnode_offset(fdt, parentoffset, name); if (offset == -FDT_ERR_NOTFOUND) offset = fdt_add_subnode(fdt, parentoffset, name); if (offset < 0) printf("%s: %s: %s ", __func__, name, fdt_strerror(offset)); return offset; } |
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/* rename to CONFIG_OF_STDOUT_PATH ? */ #if defined(OF_STDOUT_PATH) static int fdt_fixup_stdout(void *fdt, int chosenoff) { return fdt_setprop(fdt, chosenoff, "linux,stdout-path", OF_STDOUT_PATH, strlen(OF_STDOUT_PATH) + 1); } #elif defined(CONFIG_OF_STDOUT_VIA_ALIAS) && defined(CONFIG_CONS_INDEX) |
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static void fdt_fill_multisername(char *sername, size_t maxlen) { const char *outname = stdio_devices[stdout]->name; if (strcmp(outname, "serial") > 0) strncpy(sername, outname, maxlen); /* eserial? */ if (strcmp(outname + 1, "serial") > 0) strncpy(sername, outname + 1, maxlen); } |
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static int fdt_fixup_stdout(void *fdt, int chosenoff) |
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{ |
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int err; int aliasoff; |
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char sername[9] = { 0 }; |
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const void *path; int len; char tmp[256]; /* long enough */ |
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fdt_fill_multisername(sername, sizeof(sername) - 1); if (!sername[0]) sprintf(sername, "serial%d", CONFIG_CONS_INDEX - 1); |
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aliasoff = fdt_path_offset(fdt, "/aliases"); if (aliasoff < 0) { err = aliasoff; goto error; |
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} |
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path = fdt_getprop(fdt, aliasoff, sername, &len); if (!path) { err = len; goto error; } /* fdt_setprop may break "path" so we copy it to tmp buffer */ memcpy(tmp, path, len); err = fdt_setprop(fdt, chosenoff, "linux,stdout-path", tmp, len); error: |
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if (err < 0) printf("WARNING: could not set linux,stdout-path %s. ", |
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fdt_strerror(err)); |
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return err; } |
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#else static int fdt_fixup_stdout(void *fdt, int chosenoff) { return 0; } |
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#endif |
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static inline int fdt_setprop_uxx(void *fdt, int nodeoffset, const char *name, uint64_t val, int is_u64) { if (is_u64) return fdt_setprop_u64(fdt, nodeoffset, name, val); else return fdt_setprop_u32(fdt, nodeoffset, name, (uint32_t)val); } |
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int fdt_initrd(void *fdt, ulong initrd_start, ulong initrd_end) |
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{ |
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int nodeoffset; |
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int err, j, total; |
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int is_u64; |
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uint64_t addr, size; |
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/* just return if the size of initrd is zero */ if (initrd_start == initrd_end) return 0; |
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/* find or create "/chosen" node. */ nodeoffset = fdt_find_or_add_subnode(fdt, 0, "chosen"); if (nodeoffset < 0) |
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return nodeoffset; |
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total = fdt_num_mem_rsv(fdt); /* * Look for an existing entry and update it. If we don't find * the entry, we will j be the next available slot. */ for (j = 0; j < total; j++) { err = fdt_get_mem_rsv(fdt, j, &addr, &size); if (addr == initrd_start) { fdt_del_mem_rsv(fdt, j); break; |
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} |
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} |
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err = fdt_add_mem_rsv(fdt, initrd_start, initrd_end - initrd_start); |
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if (err < 0) { printf("fdt_initrd: %s ", fdt_strerror(err)); return err; } |
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is_u64 = (get_cells_len(fdt, "#address-cells") == 8); err = fdt_setprop_uxx(fdt, nodeoffset, "linux,initrd-start", (uint64_t)initrd_start, is_u64); |
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if (err < 0) { printf("WARNING: could not set linux,initrd-start %s. ", fdt_strerror(err)); return err; } |
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err = fdt_setprop_uxx(fdt, nodeoffset, "linux,initrd-end", (uint64_t)initrd_end, is_u64); |
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if (err < 0) { printf("WARNING: could not set linux,initrd-end %s. ", fdt_strerror(err)); |
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return err; |
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} |
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return 0; } |
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int fdt_chosen(void *fdt) |
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{ int nodeoffset; int err; char *str; /* used to set string properties */ |
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err = fdt_check_header(fdt); if (err < 0) { printf("fdt_chosen: %s ", fdt_strerror(err)); return err; } |
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/* find or create "/chosen" node. */ nodeoffset = fdt_find_or_add_subnode(fdt, 0, "chosen"); if (nodeoffset < 0) return nodeoffset; |
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str = getenv("bootargs"); |
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if (str) { err = fdt_setprop(fdt, nodeoffset, "bootargs", str, strlen(str) + 1); if (err < 0) { |
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printf("WARNING: could not set bootargs %s. ", fdt_strerror(err)); |
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return err; } |
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} |
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return fdt_fixup_stdout(fdt, nodeoffset); |
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} |
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void do_fixup_by_path(void *fdt, const char *path, const char *prop, const void *val, int len, int create) { #if defined(DEBUG) int i; |
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debug("Updating property '%s/%s' = ", path, prop); |
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for (i = 0; i < len; i++) debug(" %.2x", *(u8*)(val+i)); debug(" "); #endif int rc = fdt_find_and_setprop(fdt, path, prop, val, len, create); if (rc) printf("Unable to update property %s:%s, err=%s ", path, prop, fdt_strerror(rc)); } void do_fixup_by_path_u32(void *fdt, const char *path, const char *prop, u32 val, int create) { |
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fdt32_t tmp = cpu_to_fdt32(val); do_fixup_by_path(fdt, path, prop, &tmp, sizeof(tmp), create); |
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} |
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void do_fixup_by_prop(void *fdt, const char *pname, const void *pval, int plen, const char *prop, const void *val, int len, int create) { int off; #if defined(DEBUG) int i; |
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debug("Updating property '%s' = ", prop); |
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for (i = 0; i < len; i++) debug(" %.2x", *(u8*)(val+i)); debug(" "); #endif off = fdt_node_offset_by_prop_value(fdt, -1, pname, pval, plen); while (off != -FDT_ERR_NOTFOUND) { |
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if (create || (fdt_get_property(fdt, off, prop, NULL) != NULL)) |
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fdt_setprop(fdt, off, prop, val, len); off = fdt_node_offset_by_prop_value(fdt, off, pname, pval, plen); } } void do_fixup_by_prop_u32(void *fdt, const char *pname, const void *pval, int plen, const char *prop, u32 val, int create) { |
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fdt32_t tmp = cpu_to_fdt32(val); do_fixup_by_prop(fdt, pname, pval, plen, prop, &tmp, 4, create); |
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} void do_fixup_by_compat(void *fdt, const char *compat, const char *prop, const void *val, int len, int create) { int off = -1; #if defined(DEBUG) int i; |
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debug("Updating property '%s' = ", prop); |
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for (i = 0; i < len; i++) debug(" %.2x", *(u8*)(val+i)); debug(" "); #endif off = fdt_node_offset_by_compatible(fdt, -1, compat); while (off != -FDT_ERR_NOTFOUND) { |
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if (create || (fdt_get_property(fdt, off, prop, NULL) != NULL)) |
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fdt_setprop(fdt, off, prop, val, len); off = fdt_node_offset_by_compatible(fdt, off, compat); } } void do_fixup_by_compat_u32(void *fdt, const char *compat, const char *prop, u32 val, int create) { |
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fdt32_t tmp = cpu_to_fdt32(val); do_fixup_by_compat(fdt, compat, prop, &tmp, 4, create); |
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} |
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/* * fdt_pack_reg - pack address and size array into the "reg"-suitable stream */ static int fdt_pack_reg(const void *fdt, void *buf, uint64_t *address, uint64_t *size, int n) { int i; int address_len = get_cells_len(fdt, "#address-cells"); int size_len = get_cells_len(fdt, "#size-cells"); char *p = buf; for (i = 0; i < n; i++) { if (address_len == 8) *(fdt64_t *)p = cpu_to_fdt64(address[i]); else *(fdt32_t *)p = cpu_to_fdt32(address[i]); p += address_len; if (size_len == 8) *(fdt64_t *)p = cpu_to_fdt64(size[i]); else *(fdt32_t *)p = cpu_to_fdt32(size[i]); p += size_len; } return p - (char *)buf; } |
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#ifdef CONFIG_NR_DRAM_BANKS #define MEMORY_BANKS_MAX CONFIG_NR_DRAM_BANKS #else |
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#define MEMORY_BANKS_MAX 4 |
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#endif |
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int fdt_fixup_memory_banks(void *blob, u64 start[], u64 size[], int banks) { int err, nodeoffset; |
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int len; |
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u8 tmp[MEMORY_BANKS_MAX * 16]; /* Up to 64-bit address + 64-bit size */ |
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if (banks > MEMORY_BANKS_MAX) { printf("%s: num banks %d exceeds hardcoded limit %d." " Recompile with higher MEMORY_BANKS_MAX? ", __FUNCTION__, banks, MEMORY_BANKS_MAX); return -1; } |
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err = fdt_check_header(blob); if (err < 0) { printf("%s: %s ", __FUNCTION__, fdt_strerror(err)); return err; } |
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/* find or create "/memory" node. */ nodeoffset = fdt_find_or_add_subnode(blob, 0, "memory"); if (nodeoffset < 0) |
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return nodeoffset; |
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err = fdt_setprop(blob, nodeoffset, "device_type", "memory", sizeof("memory")); if (err < 0) { printf("WARNING: could not set %s %s. ", "device_type", fdt_strerror(err)); return err; } |
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len = fdt_pack_reg(blob, tmp, start, size, banks); |
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err = fdt_setprop(blob, nodeoffset, "reg", tmp, len); if (err < 0) { printf("WARNING: could not set %s %s. ", "reg", fdt_strerror(err)); return err; } return 0; } |
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int fdt_fixup_memory(void *blob, u64 start, u64 size) { return fdt_fixup_memory_banks(blob, &start, &size, 1); } |
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void fdt_fixup_ethernet(void *fdt) |
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{ |
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int node, i, j; char enet[16], *tmp, *end; |
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char mac[16]; |
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const char *path; |
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unsigned char mac_addr[6]; |
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node = fdt_path_offset(fdt, "/aliases"); |
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if (node < 0) return; |
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if (!getenv("ethaddr")) { if (getenv("usbethaddr")) { strcpy(mac, "usbethaddr"); } else { debug("No ethernet MAC Address defined "); return; } } else { strcpy(mac, "ethaddr"); } |
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i = 0; while ((tmp = getenv(mac)) != NULL) { sprintf(enet, "ethernet%d", i); path = fdt_getprop(fdt, node, enet, NULL); if (!path) { debug("No alias for %s ", enet); sprintf(mac, "eth%daddr", ++i); continue; |
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} |
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for (j = 0; j < 6; j++) { mac_addr[j] = tmp ? simple_strtoul(tmp, &end, 16) : 0; if (tmp) tmp = (*end) ? end+1 : end; |
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} |
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do_fixup_by_path(fdt, path, "mac-address", &mac_addr, 6, 0); do_fixup_by_path(fdt, path, "local-mac-address", &mac_addr, 6, 1); sprintf(mac, "eth%daddr", ++i); |
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} } |
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/* Resize the fdt to its actual size + a bit of padding */ |
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int fdt_shrink_to_minimum(void *blob) |
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{ int i; uint64_t addr, size; int total, ret; uint actualsize; if (!blob) return 0; total = fdt_num_mem_rsv(blob); for (i = 0; i < total; i++) { fdt_get_mem_rsv(blob, i, &addr, &size); |
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if (addr == (uintptr_t)blob) { |
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fdt_del_mem_rsv(blob, i); break; } } |
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/* * Calculate the actual size of the fdt |
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* plus the size needed for 5 fdt_add_mem_rsv, one * for the fdt itself and 4 for a possible initrd * ((initrd-start + initrd-end) * 2 (name & value)) |
f242a0887 fdt_resize(): ens... |
525 |
*/ |
3082d2348 fdt: refactor fdt... |
526 |
actualsize = fdt_off_dt_strings(blob) + |
3840ebfaf fdt: Fix bug in s... |
527 |
fdt_size_dt_strings(blob) + 5 * sizeof(struct fdt_reserve_entry); |
3082d2348 fdt: refactor fdt... |
528 529 |
/* Make it so the fdt ends on a page boundary */ |
925493582 sandbox: Use uint... |
530 531 |
actualsize = ALIGN(actualsize + ((uintptr_t)blob & 0xfff), 0x1000); actualsize = actualsize - ((uintptr_t)blob & 0xfff); |
3082d2348 fdt: refactor fdt... |
532 533 534 535 536 |
/* Change the fdt header to reflect the correct size */ fdt_set_totalsize(blob, actualsize); /* Add the new reservation */ |
925493582 sandbox: Use uint... |
537 |
ret = fdt_add_mem_rsv(blob, (uintptr_t)blob, actualsize); |
3082d2348 fdt: refactor fdt... |
538 539 540 541 542 |
if (ret < 0) return ret; return actualsize; } |
8ab451c46 fdt: Added helper... |
543 544 |
#ifdef CONFIG_PCI |
cfd700be9 fdt: Fix fdt_pci_... |
545 |
#define CONFIG_SYS_PCI_NR_INBOUND_WIN 4 |
8ab451c46 fdt: Added helper... |
546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 |
#define FDT_PCI_PREFETCH (0x40000000) #define FDT_PCI_MEM32 (0x02000000) #define FDT_PCI_IO (0x01000000) #define FDT_PCI_MEM64 (0x03000000) int fdt_pci_dma_ranges(void *blob, int phb_off, struct pci_controller *hose) { int addrcell, sizecell, len, r; u32 *dma_range; /* sized based on pci addr cells, size-cells, & address-cells */ u32 dma_ranges[(3 + 2 + 2) * CONFIG_SYS_PCI_NR_INBOUND_WIN]; addrcell = fdt_getprop_u32_default(blob, "/", "#address-cells", 1); sizecell = fdt_getprop_u32_default(blob, "/", "#size-cells", 1); dma_range = &dma_ranges[0]; for (r = 0; r < hose->region_count; r++) { u64 bus_start, phys_start, size; |
ff4e66e93 pci: Rename PCI_R... |
565 566 |
/* skip if !PCI_REGION_SYS_MEMORY */ if (!(hose->regions[r].flags & PCI_REGION_SYS_MEMORY)) |
8ab451c46 fdt: Added helper... |
567 568 569 570 571 572 573 |
continue; bus_start = (u64)hose->regions[r].bus_start; phys_start = (u64)hose->regions[r].phys_start; size = (u64)hose->regions[r].size; dma_range[0] = 0; |
cfd700be9 fdt: Fix fdt_pci_... |
574 |
if (size >= 0x100000000ull) |
8ab451c46 fdt: Added helper... |
575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 |
dma_range[0] |= FDT_PCI_MEM64; else dma_range[0] |= FDT_PCI_MEM32; if (hose->regions[r].flags & PCI_REGION_PREFETCH) dma_range[0] |= FDT_PCI_PREFETCH; #ifdef CONFIG_SYS_PCI_64BIT dma_range[1] = bus_start >> 32; #else dma_range[1] = 0; #endif dma_range[2] = bus_start & 0xffffffff; if (addrcell == 2) { dma_range[3] = phys_start >> 32; dma_range[4] = phys_start & 0xffffffff; } else { dma_range[3] = phys_start & 0xffffffff; } if (sizecell == 2) { dma_range[3 + addrcell + 0] = size >> 32; dma_range[3 + addrcell + 1] = size & 0xffffffff; } else { dma_range[3 + addrcell + 0] = size & 0xffffffff; } dma_range += (3 + addrcell + sizecell); } len = dma_range - &dma_ranges[0]; if (len) fdt_setprop(blob, phb_off, "dma-ranges", &dma_ranges[0], len*4); return 0; } #endif |
30d45c0d3 fdt: Add fdt_fixu... |
611 612 613 |
#ifdef CONFIG_FDT_FIXUP_NOR_FLASH_SIZE /* |
8a805df13 ppc4xx/fdt/flash:... |
614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 |
* Provide a weak default function to return the flash bank size. * There might be multiple non-identical flash chips connected to one * chip-select, so we need to pass an index as well. */ u32 __flash_get_bank_size(int cs, int idx) { extern flash_info_t flash_info[]; /* * As default, a simple 1:1 mapping is provided. Boards with * a different mapping need to supply a board specific mapping * routine. */ return flash_info[cs].size; } u32 flash_get_bank_size(int cs, int idx) __attribute__((weak, alias("__flash_get_bank_size"))); /* |
30d45c0d3 fdt: Add fdt_fixu... |
633 |
* This function can be used to update the size in the "reg" property |
8a805df13 ppc4xx/fdt/flash:... |
634 |
* of all NOR FLASH device nodes. This is necessary for boards with |
30d45c0d3 fdt: Add fdt_fixu... |
635 636 |
* non-fixed NOR FLASH sizes. */ |
8a805df13 ppc4xx/fdt/flash:... |
637 |
int fdt_fixup_nor_flash_size(void *blob) |
30d45c0d3 fdt: Add fdt_fixu... |
638 639 640 641 642 |
{ char compat[][16] = { "cfi-flash", "jedec-flash" }; int off; int len; struct fdt_property *prop; |
2778a0143 ppc4xx/fdt/flash:... |
643 |
u32 *reg, *reg2; |
30d45c0d3 fdt: Add fdt_fixu... |
644 645 646 647 648 |
int i; for (i = 0; i < 2; i++) { off = fdt_node_offset_by_compatible(blob, -1, compat[i]); while (off != -FDT_ERR_NOTFOUND) { |
8a805df13 ppc4xx/fdt/flash:... |
649 |
int idx; |
30d45c0d3 fdt: Add fdt_fixu... |
650 |
/* |
8a805df13 ppc4xx/fdt/flash:... |
651 652 |
* Found one compatible node, so fixup the size * int its reg properties |
30d45c0d3 fdt: Add fdt_fixu... |
653 654 655 |
*/ prop = fdt_get_property_w(blob, off, "reg", &len); if (prop) { |
8a805df13 ppc4xx/fdt/flash:... |
656 657 658 659 660 661 |
int tuple_size = 3 * sizeof(reg); /* * There might be multiple reg-tuples, * so loop through them all */ |
2778a0143 ppc4xx/fdt/flash:... |
662 663 |
reg = reg2 = (u32 *)&prop->data[0]; for (idx = 0; idx < (len / tuple_size); idx++) { |
8a805df13 ppc4xx/fdt/flash:... |
664 665 666 667 668 |
/* * Update size in reg property */ reg[2] = flash_get_bank_size(reg[0], idx); |
2778a0143 ppc4xx/fdt/flash:... |
669 670 671 672 673 |
/* * Point to next reg tuple */ reg += 3; |
30d45c0d3 fdt: Add fdt_fixu... |
674 |
} |
2778a0143 ppc4xx/fdt/flash:... |
675 676 |
fdt_setprop(blob, off, "reg", reg2, len); |
30d45c0d3 fdt: Add fdt_fixu... |
677 678 679 680 681 682 683 |
} /* Move to next compatible node */ off = fdt_node_offset_by_compatible(blob, off, compat[i]); } } |
8a805df13 ppc4xx/fdt/flash:... |
684 |
return 0; |
30d45c0d3 fdt: Add fdt_fixu... |
685 686 |
} #endif |
3c950e2eb fdt_support: add ... |
687 |
|
cb2707af7 common/fdt_suppor... |
688 689 690 691 692 693 694 695 696 |
int fdt_increase_size(void *fdt, int add_len) { int newlen; newlen = fdt_totalsize(fdt) + add_len; /* Open in place with a new len */ return fdt_open_into(fdt, fdt, newlen); } |
3c950e2eb fdt_support: add ... |
697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 |
#ifdef CONFIG_FDT_FIXUP_PARTITIONS #include <jffs2/load_kernel.h> #include <mtd_node.h> struct reg_cell { unsigned int r0; unsigned int r1; }; int fdt_del_subnodes(const void *blob, int parent_offset) { int off, ndepth; int ret; for (ndepth = 0, off = fdt_next_node(blob, parent_offset, &ndepth); (off >= 0) && (ndepth > 0); off = fdt_next_node(blob, off, &ndepth)) { if (ndepth == 1) { debug("delete %s: offset: %x ", fdt_get_name(blob, off, 0), off); ret = fdt_del_node((void *)blob, off); if (ret < 0) { printf("Can't delete node: %s ", fdt_strerror(ret)); return ret; } else { ndepth = 0; off = parent_offset; } } } return 0; } |
3c950e2eb fdt_support: add ... |
732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 |
int fdt_del_partitions(void *blob, int parent_offset) { const void *prop; int ndepth = 0; int off; int ret; off = fdt_next_node(blob, parent_offset, &ndepth); if (off > 0 && ndepth == 1) { prop = fdt_getprop(blob, off, "label", NULL); if (prop == NULL) { /* * Could not find label property, nand {}; node? * Check subnode, delete partitions there if any. */ return fdt_del_partitions(blob, off); } else { ret = fdt_del_subnodes(blob, parent_offset); if (ret < 0) { printf("Can't remove subnodes: %s ", fdt_strerror(ret)); return ret; } } } return 0; } int fdt_node_set_part_info(void *blob, int parent_offset, struct mtd_device *dev) { struct list_head *pentry; struct part_info *part; struct reg_cell cell; int off, ndepth = 0; int part_num, ret; char buf[64]; ret = fdt_del_partitions(blob, parent_offset); if (ret < 0) return ret; /* * Check if it is nand {}; subnode, adjust * the offset in this case */ off = fdt_next_node(blob, parent_offset, &ndepth); if (off > 0 && ndepth == 1) parent_offset = off; part_num = 0; list_for_each_prev(pentry, &dev->parts) { int newoff; part = list_entry(pentry, struct part_info, link); |
06503f16c mtd: fix warnings... |
788 789 |
debug("%2d: %-20s0x%08llx\t0x%08llx\t%d ", |
3c950e2eb fdt_support: add ... |
790 791 |
part_num, part->name, part->size, part->offset, part->mask_flags); |
06503f16c mtd: fix warnings... |
792 |
sprintf(buf, "partition@%llx", part->offset); |
3c950e2eb fdt_support: add ... |
793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 |
add_sub: ret = fdt_add_subnode(blob, parent_offset, buf); if (ret == -FDT_ERR_NOSPACE) { ret = fdt_increase_size(blob, 512); if (!ret) goto add_sub; else goto err_size; } else if (ret < 0) { printf("Can't add partition node: %s ", fdt_strerror(ret)); return ret; } newoff = ret; /* Check MTD_WRITEABLE_CMD flag */ if (part->mask_flags & 1) { add_ro: ret = fdt_setprop(blob, newoff, "read_only", NULL, 0); if (ret == -FDT_ERR_NOSPACE) { ret = fdt_increase_size(blob, 512); if (!ret) goto add_ro; else goto err_size; } else if (ret < 0) goto err_prop; } cell.r0 = cpu_to_fdt32(part->offset); cell.r1 = cpu_to_fdt32(part->size); add_reg: ret = fdt_setprop(blob, newoff, "reg", &cell, sizeof(cell)); if (ret == -FDT_ERR_NOSPACE) { ret = fdt_increase_size(blob, 512); if (!ret) goto add_reg; else goto err_size; } else if (ret < 0) goto err_prop; add_label: ret = fdt_setprop_string(blob, newoff, "label", part->name); if (ret == -FDT_ERR_NOSPACE) { ret = fdt_increase_size(blob, 512); if (!ret) goto add_label; else goto err_size; } else if (ret < 0) goto err_prop; part_num++; } return 0; err_size: printf("Can't increase blob size: %s ", fdt_strerror(ret)); return ret; err_prop: printf("Can't add property: %s ", fdt_strerror(ret)); return ret; } /* * Update partitions in nor/nand nodes using info from * mtdparts environment variable. The nodes to update are * specified by node_info structure which contains mtd device * type and compatible string: E. g. the board code in * ft_board_setup() could use: * * struct node_info nodes[] = { * { "fsl,mpc5121-nfc", MTD_DEV_TYPE_NAND, }, * { "cfi-flash", MTD_DEV_TYPE_NOR, }, * }; * * fdt_fixup_mtdparts(blob, nodes, ARRAY_SIZE(nodes)); */ void fdt_fixup_mtdparts(void *blob, void *node_info, int node_info_size) { struct node_info *ni = node_info; struct mtd_device *dev; char *parts; int i, idx; int noff; parts = getenv("mtdparts"); if (!parts) return; if (mtdparts_init() != 0) return; for (i = 0; i < node_info_size; i++) { idx = 0; noff = fdt_node_offset_by_compatible(blob, -1, ni[i].compat); while (noff != -FDT_ERR_NOTFOUND) { debug("%s: %s, mtd dev type %d ", fdt_get_name(blob, noff, 0), ni[i].compat, ni[i].type); dev = device_find(ni[i].type, idx++); if (dev) { if (fdt_node_set_part_info(blob, noff, dev)) return; /* return on error */ } /* Jump to next flash node */ noff = fdt_node_offset_by_compatible(blob, noff, ni[i].compat); } } } #endif |
49b97d9c8 fdt: Add fdt_del_... |
910 911 912 913 914 915 916 917 918 919 920 921 922 |
void fdt_del_node_and_alias(void *blob, const char *alias) { int off = fdt_path_offset(blob, alias); if (off < 0) return; fdt_del_node(blob, off); off = fdt_path_offset(blob, "/aliases"); fdt_delprop(blob, off, alias); } |
a0342c080 fdt: Add fdt_tran... |
923 |
|
a0342c080 fdt: Add fdt_tran... |
924 925 926 927 928 929 930 931 932 933 |
#define PRu64 "%llx" /* Max address size we deal with */ #define OF_MAX_ADDR_CELLS 4 #define OF_BAD_ADDR ((u64)-1) #define OF_CHECK_COUNTS(na, ns) ((na) > 0 && (na) <= OF_MAX_ADDR_CELLS && \ (ns) > 0) /* Debug utility */ #ifdef DEBUG |
8aa5ec6e1 common/fdt_suppor... |
934 |
static void of_dump_addr(const char *s, const fdt32_t *addr, int na) |
a0342c080 fdt: Add fdt_tran... |
935 936 937 938 939 940 941 942 |
{ printf("%s", s); while(na--) printf(" %08x", *(addr++)); printf(" "); } #else |
8aa5ec6e1 common/fdt_suppor... |
943 |
static void of_dump_addr(const char *s, const fdt32_t *addr, int na) { } |
a0342c080 fdt: Add fdt_tran... |
944 945 946 947 948 949 |
#endif /* Callbacks for bus specific translators */ struct of_bus { const char *name; const char *addresses; |
6395f318e fdt: call fdt_par... |
950 |
void (*count_cells)(void *blob, int parentoffset, |
a0342c080 fdt: Add fdt_tran... |
951 |
int *addrc, int *sizec); |
8aa5ec6e1 common/fdt_suppor... |
952 |
u64 (*map)(fdt32_t *addr, const fdt32_t *range, |
a0342c080 fdt: Add fdt_tran... |
953 |
int na, int ns, int pna); |
8aa5ec6e1 common/fdt_suppor... |
954 |
int (*translate)(fdt32_t *addr, u64 offset, int na); |
a0342c080 fdt: Add fdt_tran... |
955 956 957 |
}; /* Default translator (generic bus) */ |
f43b4356a fdt_support: Make... |
958 |
void of_bus_default_count_cells(void *blob, int parentoffset, |
a0342c080 fdt: Add fdt_tran... |
959 960 |
int *addrc, int *sizec) { |
8aa5ec6e1 common/fdt_suppor... |
961 |
const fdt32_t *prop; |
6395f318e fdt: call fdt_par... |
962 963 964 965 |
if (addrc) { prop = fdt_getprop(blob, parentoffset, "#address-cells", NULL); if (prop) |
8aa5ec6e1 common/fdt_suppor... |
966 |
*addrc = be32_to_cpup(prop); |
6395f318e fdt: call fdt_par... |
967 968 969 970 971 972 973 |
else *addrc = 2; } if (sizec) { prop = fdt_getprop(blob, parentoffset, "#size-cells", NULL); if (prop) |
8aa5ec6e1 common/fdt_suppor... |
974 |
*sizec = be32_to_cpup(prop); |
6395f318e fdt: call fdt_par... |
975 976 977 |
else *sizec = 1; } |
a0342c080 fdt: Add fdt_tran... |
978 |
} |
8aa5ec6e1 common/fdt_suppor... |
979 |
static u64 of_bus_default_map(fdt32_t *addr, const fdt32_t *range, |
a0342c080 fdt: Add fdt_tran... |
980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 |
int na, int ns, int pna) { u64 cp, s, da; cp = of_read_number(range, na); s = of_read_number(range + na + pna, ns); da = of_read_number(addr, na); debug("OF: default map, cp="PRu64", s="PRu64", da="PRu64" ", cp, s, da); if (da < cp || da >= (cp + s)) return OF_BAD_ADDR; return da - cp; } |
8aa5ec6e1 common/fdt_suppor... |
996 |
static int of_bus_default_translate(fdt32_t *addr, u64 offset, int na) |
a0342c080 fdt: Add fdt_tran... |
997 998 999 1000 1001 |
{ u64 a = of_read_number(addr, na); memset(addr, 0, na * 4); a += offset; if (na > 1) |
8aa5ec6e1 common/fdt_suppor... |
1002 1003 |
addr[na - 2] = cpu_to_fdt32(a >> 32); addr[na - 1] = cpu_to_fdt32(a & 0xffffffffu); |
a0342c080 fdt: Add fdt_tran... |
1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 |
return 0; } /* Array of bus specific translators */ static struct of_bus of_busses[] = { /* Default */ { .name = "default", .addresses = "reg", .count_cells = of_bus_default_count_cells, .map = of_bus_default_map, .translate = of_bus_default_translate, }, }; static int of_translate_one(void * blob, int parent, struct of_bus *bus, |
8aa5ec6e1 common/fdt_suppor... |
1021 |
struct of_bus *pbus, fdt32_t *addr, |
a0342c080 fdt: Add fdt_tran... |
1022 1023 |
int na, int ns, int pna, const char *rprop) { |
8aa5ec6e1 common/fdt_suppor... |
1024 |
const fdt32_t *ranges; |
a0342c080 fdt: Add fdt_tran... |
1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 |
int rlen; int rone; u64 offset = OF_BAD_ADDR; /* Normally, an absence of a "ranges" property means we are * crossing a non-translatable boundary, and thus the addresses * below the current not cannot be converted to CPU physical ones. * Unfortunately, while this is very clear in the spec, it's not * what Apple understood, and they do have things like /uni-n or * /ht nodes with no "ranges" property and a lot of perfectly * useable mapped devices below them. Thus we treat the absence of * "ranges" as equivalent to an empty "ranges" property which means * a 1:1 translation at that level. It's up to the caller not to try * to translate addresses that aren't supposed to be translated in * the first place. --BenH. */ |
8aa5ec6e1 common/fdt_suppor... |
1041 |
ranges = fdt_getprop(blob, parent, rprop, &rlen); |
a0342c080 fdt: Add fdt_tran... |
1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 |
if (ranges == NULL || rlen == 0) { offset = of_read_number(addr, na); memset(addr, 0, pna * 4); debug("OF: no ranges, 1:1 translation "); goto finish; } debug("OF: walking ranges... "); /* Now walk through the ranges */ rlen /= 4; rone = na + pna + ns; for (; rlen >= rone; rlen -= rone, ranges += rone) { offset = bus->map(addr, ranges, na, ns, pna); if (offset != OF_BAD_ADDR) break; } if (offset == OF_BAD_ADDR) { debug("OF: not found ! "); return 1; } memcpy(addr, ranges + na, 4 * pna); finish: of_dump_addr("OF: parent translation for:", addr, pna); debug("OF: with offset: "PRu64" ", offset); /* Translate it into parent bus space */ return pbus->translate(addr, offset, pna); } /* * Translate an address from the device-tree into a CPU physical address, * this walks up the tree and applies the various bus mappings on the * way. * * Note: We consider that crossing any level with #size-cells == 0 to mean * that translation is impossible (that is we are not dealing with a value * that can be mapped to a cpu physical address). This is not really specified * that way, but this is traditionally the way IBM at least do things */ |
8aa5ec6e1 common/fdt_suppor... |
1087 1088 |
static u64 __of_translate_address(void *blob, int node_offset, const fdt32_t *in_addr, const char *rprop) |
a0342c080 fdt: Add fdt_tran... |
1089 1090 1091 |
{ int parent; struct of_bus *bus, *pbus; |
8aa5ec6e1 common/fdt_suppor... |
1092 |
fdt32_t addr[OF_MAX_ADDR_CELLS]; |
a0342c080 fdt: Add fdt_tran... |
1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 |
int na, ns, pna, pns; u64 result = OF_BAD_ADDR; debug("OF: ** translation for device %s ** ", fdt_get_name(blob, node_offset, NULL)); /* Get parent & match bus type */ parent = fdt_parent_offset(blob, node_offset); if (parent < 0) goto bail; bus = &of_busses[0]; /* Cound address cells & copy address locally */ |
6395f318e fdt: call fdt_par... |
1107 |
bus->count_cells(blob, parent, &na, &ns); |
a0342c080 fdt: Add fdt_tran... |
1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 |
if (!OF_CHECK_COUNTS(na, ns)) { printf("%s: Bad cell count for %s ", __FUNCTION__, fdt_get_name(blob, node_offset, NULL)); goto bail; } memcpy(addr, in_addr, na * 4); debug("OF: bus is %s (na=%d, ns=%d) on %s ", bus->name, na, ns, fdt_get_name(blob, parent, NULL)); of_dump_addr("OF: translating address:", addr, na); /* Translate */ for (;;) { /* Switch to parent bus */ node_offset = parent; parent = fdt_parent_offset(blob, node_offset); /* If root, we have finished */ if (parent < 0) { debug("OF: reached root node "); result = of_read_number(addr, na); break; } /* Get new parent bus and counts */ pbus = &of_busses[0]; |
6395f318e fdt: call fdt_par... |
1137 |
pbus->count_cells(blob, parent, &pna, &pns); |
a0342c080 fdt: Add fdt_tran... |
1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 |
if (!OF_CHECK_COUNTS(pna, pns)) { printf("%s: Bad cell count for %s ", __FUNCTION__, fdt_get_name(blob, node_offset, NULL)); break; } debug("OF: parent bus is %s (na=%d, ns=%d) on %s ", pbus->name, pna, pns, fdt_get_name(blob, parent, NULL)); /* Apply bus translation */ if (of_translate_one(blob, node_offset, bus, pbus, addr, na, ns, pna, rprop)) break; /* Complete the move up one level */ na = pna; ns = pns; bus = pbus; of_dump_addr("OF: one level translation:", addr, na); } bail: return result; } |
8aa5ec6e1 common/fdt_suppor... |
1165 |
u64 fdt_translate_address(void *blob, int node_offset, const fdt32_t *in_addr) |
a0342c080 fdt: Add fdt_tran... |
1166 1167 1168 |
{ return __of_translate_address(blob, node_offset, in_addr, "ranges"); } |
75e73afd5 fdt: Add fdt_node... |
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/** * fdt_node_offset_by_compat_reg: Find a node that matches compatiable and * who's reg property matches a physical cpu address * * @blob: ptr to device tree * @compat: compatiable string to match * @compat_off: property name * */ int fdt_node_offset_by_compat_reg(void *blob, const char *compat, phys_addr_t compat_off) { int len, off = fdt_node_offset_by_compatible(blob, -1, compat); while (off != -FDT_ERR_NOTFOUND) { |
8aa5ec6e1 common/fdt_suppor... |
1184 |
const fdt32_t *reg = fdt_getprop(blob, off, "reg", &len); |
75e73afd5 fdt: Add fdt_node... |
1185 1186 1187 1188 1189 1190 1191 1192 1193 |
if (reg) { if (compat_off == fdt_translate_address(blob, off, reg)) return off; } off = fdt_node_offset_by_compatible(blob, off, compat); } return -FDT_ERR_NOTFOUND; } |
b4b847e95 fdt: Add function... |
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/** * fdt_alloc_phandle: Return next free phandle value * * @blob: ptr to device tree */ int fdt_alloc_phandle(void *blob) { |
50bf17bd1 fdt: update fdt_a... |
1201 |
int offset, phandle = 0; |
b4b847e95 fdt: Add function... |
1202 1203 1204 |
for (offset = fdt_next_node(blob, -1, NULL); offset >= 0; offset = fdt_next_node(blob, offset, NULL)) { |
50bf17bd1 fdt: update fdt_a... |
1205 |
phandle = max(phandle, fdt_get_phandle(blob, offset)); |
b4b847e95 fdt: Add function... |
1206 |
} |
75e73afd5 fdt: Add fdt_node... |
1207 |
|
b4b847e95 fdt: Add function... |
1208 1209 |
return phandle + 1; } |
beca5a5f5 fdt_support: supp... |
1210 |
|
a8d2a75d7 fdt: introduce fd... |
1211 |
/* |
f117c0f07 fdt: Rename fdt_c... |
1212 |
* fdt_set_phandle: Create a phandle property for the given node |
a8d2a75d7 fdt: introduce fd... |
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* * @fdt: ptr to device tree * @nodeoffset: node to update * @phandle: phandle value to set (must be unique) |
f117c0f07 fdt: Rename fdt_c... |
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*/ int fdt_set_phandle(void *fdt, int nodeoffset, uint32_t phandle) |
a8d2a75d7 fdt: introduce fd... |
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{ int ret; #ifdef DEBUG int off = fdt_node_offset_by_phandle(fdt, phandle); if ((off >= 0) && (off != nodeoffset)) { char buf[64]; fdt_get_path(fdt, nodeoffset, buf, sizeof(buf)); printf("Trying to update node %s with phandle %u ", buf, phandle); fdt_get_path(fdt, off, buf, sizeof(buf)); printf("that already exists in node %s. ", buf); return -FDT_ERR_BADPHANDLE; } #endif ret = fdt_setprop_cell(fdt, nodeoffset, "phandle", phandle); if (ret < 0) return ret; /* * For now, also set the deprecated "linux,phandle" property, so that we * don't break older kernels. */ ret = fdt_setprop_cell(fdt, nodeoffset, "linux,phandle", phandle); return ret; } |
10aeabd18 fdt: Add new fdt_... |
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/* * fdt_create_phandle: Create a phandle property for the given node * * @fdt: ptr to device tree * @nodeoffset: node to update */ |
3c927cccd fdt: check for fd... |
1257 |
unsigned int fdt_create_phandle(void *fdt, int nodeoffset) |
10aeabd18 fdt: Add new fdt_... |
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{ /* see if there is a phandle already */ int phandle = fdt_get_phandle(fdt, nodeoffset); /* if we got 0, means no phandle so create one */ if (phandle == 0) { |
3c927cccd fdt: check for fd... |
1264 |
int ret; |
10aeabd18 fdt: Add new fdt_... |
1265 |
phandle = fdt_alloc_phandle(fdt); |
3c927cccd fdt: check for fd... |
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ret = fdt_set_phandle(fdt, nodeoffset, phandle); if (ret < 0) { printf("Can't set phandle %u: %s ", phandle, fdt_strerror(ret)); return 0; } |
10aeabd18 fdt: Add new fdt_... |
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} return phandle; } |
2a523f524 fdt: Add new fdt_... |
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/* * fdt_set_node_status: Set status for the given node * * @fdt: ptr to device tree * @nodeoffset: node to update * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED, * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE */ int fdt_set_node_status(void *fdt, int nodeoffset, enum fdt_status status, unsigned int error_code) { char buf[16]; int ret = 0; if (nodeoffset < 0) return nodeoffset; switch (status) { case FDT_STATUS_OKAY: ret = fdt_setprop_string(fdt, nodeoffset, "status", "okay"); break; case FDT_STATUS_DISABLED: ret = fdt_setprop_string(fdt, nodeoffset, "status", "disabled"); break; case FDT_STATUS_FAIL: ret = fdt_setprop_string(fdt, nodeoffset, "status", "fail"); break; case FDT_STATUS_FAIL_ERROR_CODE: sprintf(buf, "fail-%d", error_code); ret = fdt_setprop_string(fdt, nodeoffset, "status", buf); break; default: printf("Invalid fdt status: %x ", status); ret = -1; break; } return ret; } /* * fdt_set_status_by_alias: Set status for the given node given an alias * * @fdt: ptr to device tree * @alias: alias of node to update * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED, * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE */ int fdt_set_status_by_alias(void *fdt, const char* alias, enum fdt_status status, unsigned int error_code) { int offset = fdt_path_offset(fdt, alias); return fdt_set_node_status(fdt, offset, status, error_code); } |
096eb3f59 fdt: edid: Enable... |
1335 |
#if defined(CONFIG_VIDEO) || defined(CONFIG_LCD) |
beca5a5f5 fdt_support: supp... |
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int fdt_add_edid(void *blob, const char *compat, unsigned char *edid_buf) { int noff; int ret; noff = fdt_node_offset_by_compatible(blob, -1, compat); if (noff != -FDT_ERR_NOTFOUND) { debug("%s: %s ", fdt_get_name(blob, noff, 0), compat); add_edid: ret = fdt_setprop(blob, noff, "edid", edid_buf, 128); if (ret == -FDT_ERR_NOSPACE) { ret = fdt_increase_size(blob, 512); if (!ret) goto add_edid; else goto err_size; } else if (ret < 0) { printf("Can't add property: %s ", fdt_strerror(ret)); return ret; } } return 0; err_size: printf("Can't increase blob size: %s ", fdt_strerror(ret)); return ret; } #endif |
bb682001f fdt: introduce fd... |
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/* * Verify the physical address of device tree node for a given alias * * This function locates the device tree node of a given alias, and then * verifies that the physical address of that device matches the given * parameter. It displays a message if there is a mismatch. * * Returns 1 on success, 0 on failure */ int fdt_verify_alias_address(void *fdt, int anode, const char *alias, u64 addr) { const char *path; |
8aa5ec6e1 common/fdt_suppor... |
1379 |
const fdt32_t *reg; |
bb682001f fdt: introduce fd... |
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int node, len; u64 dt_addr; path = fdt_getprop(fdt, anode, alias, NULL); if (!path) { /* If there's no such alias, then it's not a failure */ return 1; } node = fdt_path_offset(fdt, path); if (node < 0) { printf("Warning: device tree alias '%s' points to invalid " "node %s. ", alias, path); return 0; } reg = fdt_getprop(fdt, node, "reg", &len); if (!reg) { printf("Warning: device tree node '%s' has no address. ", path); return 0; } dt_addr = fdt_translate_address(fdt, node, reg); if (addr != dt_addr) { printf("Warning: U-Boot configured device %s at address %llx, " " but the device tree has it address %llx. ", alias, addr, dt_addr); return 0; } return 1; } /* * Returns the base address of an SOC or PCI node */ u64 fdt_get_base_address(void *fdt, int node) { int size; u32 naddr; |
8aa5ec6e1 common/fdt_suppor... |
1425 |
const fdt32_t *prop; |
bb682001f fdt: introduce fd... |
1426 1427 1428 |
prop = fdt_getprop(fdt, node, "#address-cells", &size); if (prop && size == 4) |
8aa5ec6e1 common/fdt_suppor... |
1429 |
naddr = be32_to_cpup(prop); |
bb682001f fdt: introduce fd... |
1430 1431 1432 1433 1434 1435 1436 |
else naddr = 2; prop = fdt_getprop(fdt, node, "ranges", &size); return prop ? fdt_translate_address(fdt, node, prop + naddr) : 0; } |
c48e68688 fdt_support: Add ... |
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/* * Read a property of size <prop_len>. Currently only supports 1 or 2 cells. */ static int fdt_read_prop(const fdt32_t *prop, int prop_len, int cell_off, uint64_t *val, int cells) { const fdt32_t *prop32 = &prop[cell_off]; const fdt64_t *prop64 = (const fdt64_t *)&prop[cell_off]; if ((cell_off + cells) > prop_len) return -FDT_ERR_NOSPACE; switch (cells) { case 1: *val = fdt32_to_cpu(*prop32); break; case 2: *val = fdt64_to_cpu(*prop64); break; default: return -FDT_ERR_NOSPACE; } return 0; } /** * fdt_read_range - Read a node's n'th range property * * @fdt: ptr to device tree * @node: offset of node * @n: range index * @child_addr: pointer to storage for the "child address" field * @addr: pointer to storage for the CPU view translated physical start * @len: pointer to storage for the range length * * Convenience function that reads and interprets a specific range out of * a number of the "ranges" property array. */ int fdt_read_range(void *fdt, int node, int n, uint64_t *child_addr, uint64_t *addr, uint64_t *len) { int pnode = fdt_parent_offset(fdt, node); const fdt32_t *ranges; int pacells; int acells; int scells; int ranges_len; int cell = 0; int r = 0; /* * The "ranges" property is an array of * { <child address> <parent address> <size in child address space> } * * All 3 elements can span a diffent number of cells. Fetch their size. */ pacells = fdt_getprop_u32_default_node(fdt, pnode, 0, "#address-cells", 1); acells = fdt_getprop_u32_default_node(fdt, node, 0, "#address-cells", 1); scells = fdt_getprop_u32_default_node(fdt, node, 0, "#size-cells", 1); /* Now try to get the ranges property */ ranges = fdt_getprop(fdt, node, "ranges", &ranges_len); if (!ranges) return -FDT_ERR_NOTFOUND; ranges_len /= sizeof(uint32_t); /* Jump to the n'th entry */ cell = n * (pacells + acells + scells); /* Read <child address> */ if (child_addr) { r = fdt_read_prop(ranges, ranges_len, cell, child_addr, acells); if (r) return r; } cell += acells; /* Read <parent address> */ if (addr) *addr = fdt_translate_address(fdt, node, ranges + cell); cell += pacells; /* Read <size in child address space> */ if (len) { r = fdt_read_prop(ranges, ranges_len, cell, len, scells); if (r) return r; } return 0; } |