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@@ -1,5 +1,22 @@
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/*
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* OF flat tree builder
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+ * Written by: Pantelis Antoniou <pantelis.antoniou@gmail.com>
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+ * Updated by: Matthew McClintock <msm@freescale.com>
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+ *
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+ * This program is free software; you can redistribute it and/or
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+ * modify it under the terms of the GNU General Public License as
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+ * published by the Free Software Foundation; either version 2 of
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+ * the License, or (at your option) any later version.
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+ *
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+ * This program is distributed in the hope that it will be useful,
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+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+ * GNU General Public License for more details.
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+ *
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+ * You should have received a copy of the GNU General Public License
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+ * along with this program; if not, write to the Free Software
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+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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+ * MA 02111-1307 USA
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*/
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#include <common.h>
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@@ -13,44 +30,39 @@
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#include <ft_build.h>
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+#undef DEBUG
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+
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/* align addr on a size boundary - adjust address up if needed -- Cort */
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#define _ALIGN(addr,size) (((addr)+(size)-1)&(~((size)-1)))
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+#ifndef CONFIG_OF_BOOT_CPU
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+#define CONFIG_OF_BOOT_CPU 0
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+#endif
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+#define SIZE_OF_RSVMAP_ENTRY (2*sizeof(u64))
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static void ft_put_word(struct ft_cxt *cxt, u32 v)
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{
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- if (cxt->overflow) /* do nothing */
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- return;
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-
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- /* check for overflow */
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- if (cxt->p + 4 > cxt->pstr) {
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- cxt->overflow = 1;
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- return;
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- }
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+ memmove(cxt->p + sizeof(u32), cxt->p, cxt->p_end - cxt->p);
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*(u32 *) cxt->p = cpu_to_be32(v);
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- cxt->p += 4;
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+ cxt->p += sizeof(u32);
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+ cxt->p_end += sizeof(u32);
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}
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static inline void ft_put_bin(struct ft_cxt *cxt, const void *data, int sz)
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{
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- u8 *p;
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+ int aligned_size = ((u8 *)_ALIGN((unsigned long)cxt->p + sz,
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+ sizeof(u32))) - cxt->p;
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- if (cxt->overflow) /* do nothing */
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- return;
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-
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- /* next pointer pos */
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- p = (u8 *) _ALIGN((unsigned long)cxt->p + sz, 4);
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+ memmove(cxt->p + aligned_size, cxt->p, cxt->p_end - cxt->p);
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- /* check for overflow */
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- if (p > cxt->pstr) {
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- cxt->overflow = 1;
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- return;
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- }
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+ /* make sure the last bytes are zeroed */
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+ memset(cxt->p + aligned_size - (aligned_size % sizeof(u32)), 0,
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+ (aligned_size % sizeof(u32)));
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memcpy(cxt->p, data, sz);
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- if ((sz & 3) != 0)
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- memset(cxt->p + sz, 0, 4 - (sz & 3));
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- cxt->p = p;
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+
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+ cxt->p += aligned_size;
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+ cxt->p_end += aligned_size;
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}
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void ft_begin_node(struct ft_cxt *cxt, const char *name)
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@@ -73,10 +85,10 @@ static int lookup_string(struct ft_cxt *cxt, const char *name)
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{
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u8 *p;
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- p = cxt->pstr;
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- while (p < cxt->pstr_begin) {
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+ p = cxt->p;
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+ while (p < cxt->p_end) {
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if (strcmp(p, name) == 0)
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- return p - cxt->p_begin;
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+ return p - cxt->p;
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p += strlen(p) + 1;
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}
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@@ -85,24 +97,13 @@ static int lookup_string(struct ft_cxt *cxt, const char *name)
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void ft_prop(struct ft_cxt *cxt, const char *name, const void *data, int sz)
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{
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- int len, off;
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-
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- if (cxt->overflow)
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- return;
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-
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- len = strlen(name) + 1;
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+ int off = 0;
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off = lookup_string(cxt, name);
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if (off == -1) {
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- /* check if we have space */
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- if (cxt->p + 12 + sz + len > cxt->pstr) {
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- cxt->overflow = 1;
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- return;
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- }
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-
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- cxt->pstr -= len;
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- memcpy(cxt->pstr, name, len);
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- off = cxt->pstr - cxt->p_begin;
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+ memcpy(cxt->p_end, name, strlen(name) + 1);
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+ off = cxt->p_end - cxt->p;
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+ cxt->p_end += strlen(name) + 2;
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}
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/* now put offset from beginning of *STRUCTURE* */
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@@ -122,138 +123,63 @@ void ft_prop_int(struct ft_cxt *cxt, const char *name, int val)
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{
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u32 v = cpu_to_be32((u32) val);
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- ft_prop(cxt, name, &v, 4);
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+ ft_prop(cxt, name, &v, sizeof(u32));
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}
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-/* start construction of the flat OF tree */
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-void ft_begin(struct ft_cxt *cxt, void *blob, int max_size)
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+/* pick up and start working on a tree in place */
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+void ft_init_cxt(struct ft_cxt *cxt, void *blob)
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{
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struct boot_param_header *bph = blob;
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- u32 off;
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- /* clear the cxt */
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memset(cxt, 0, sizeof(*cxt));
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cxt->bph = bph;
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- cxt->max_size = max_size;
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-
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- /* zero everything in the header area */
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- memset(bph, 0, sizeof(*bph));
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-
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- bph->magic = cpu_to_be32(OF_DT_HEADER);
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- bph->version = cpu_to_be32(0x10);
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- bph->last_comp_version = cpu_to_be32(0x10);
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+ bph->boot_cpuid_phys = CONFIG_OF_BOOT_CPU;
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- /* start pointers */
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- cxt->pres_begin = (u8 *) _ALIGN((unsigned long)(bph + 1), 8);
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- cxt->pres = cxt->pres_begin;
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-
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- off = (unsigned long)cxt->pres_begin - (unsigned long)bph;
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- bph->off_mem_rsvmap = cpu_to_be32(off);
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-
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- ((u64 *) cxt->pres)[0] = 0; /* phys = 0, size = 0, terminate */
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- ((u64 *) cxt->pres)[1] = 0;
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+ /* find beginning and end of reserve map table (zeros in last entry) */
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+ cxt->p_rsvmap = (u8 *)bph + bph->off_mem_rsvmap;
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+ while ( ((uint64_t *)cxt->p_rsvmap)[0] != 0 &&
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+ ((uint64_t *)cxt->p_rsvmap)[1] != 0 ) {
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+ cxt->p_rsvmap += SIZE_OF_RSVMAP_ENTRY;
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+ }
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- cxt->p_anchor = cxt->pres + 16; /* over the terminator */
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+ cxt->p_start = (char*)bph + bph->off_dt_struct;
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+ cxt->p_end = (char *)bph + bph->totalsize;
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+ cxt->p = (char *)bph + bph->off_dt_strings;
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}
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/* add a reserver physical area to the rsvmap */
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-void ft_add_rsvmap(struct ft_cxt *cxt, u64 physaddr, u64 size)
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+void ft_add_rsvmap(struct ft_cxt *cxt, u64 physstart, u64 physend)
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{
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- ((u64 *) cxt->pres)[0] = cpu_to_be64(physaddr); /* phys = 0, size = 0, terminate */
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- ((u64 *) cxt->pres)[1] = cpu_to_be64(size);
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-
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- cxt->pres += 16; /* advance */
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-
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- ((u64 *) cxt->pres)[0] = 0; /* phys = 0, size = 0, terminate */
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- ((u64 *) cxt->pres)[1] = 0;
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-
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- /* keep track of size */
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- cxt->res_size = cxt->pres + 16 - cxt->pres_begin;
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-
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- cxt->p_anchor = cxt->pres + 16; /* over the terminator */
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+ memmove(cxt->p_rsvmap + SIZE_OF_RSVMAP_ENTRY, cxt->p_rsvmap,
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+ cxt->p_end - cxt->p_rsvmap);
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+
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+ ((u64 *)cxt->p_rsvmap)[0] = cpu_to_be64(physstart);
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+ ((u64 *)cxt->p_rsvmap)[1] = cpu_to_be64(physend);
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+ ((u64 *)cxt->p_rsvmap)[2] = 0;
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+ ((u64 *)cxt->p_rsvmap)[3] = 0;
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+
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+ cxt->p_rsvmap += SIZE_OF_RSVMAP_ENTRY;
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+ cxt->p_start += SIZE_OF_RSVMAP_ENTRY;
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+ cxt->p += SIZE_OF_RSVMAP_ENTRY;
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+ cxt->p_end += SIZE_OF_RSVMAP_ENTRY;
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}
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-void ft_begin_tree(struct ft_cxt *cxt)
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+void ft_end_tree(struct ft_cxt *cxt)
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{
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- cxt->p_begin = cxt->p_anchor;
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- cxt->pstr_begin = (char *)cxt->bph + cxt->max_size; /* point at the end */
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-
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- cxt->p = cxt->p_begin;
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- cxt->pstr = cxt->pstr_begin;
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+ ft_put_word(cxt, OF_DT_END);
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}
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-int ft_end_tree(struct ft_cxt *cxt)
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-{
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+/* update the boot param header with correct values */
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+void ft_finalize_tree(struct ft_cxt *cxt) {
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struct boot_param_header *bph = cxt->bph;
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- int off, sz, sz1;
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- u32 tag, v;
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- u8 *p;
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-
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- ft_put_word(cxt, OF_DT_END);
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-
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- if (cxt->overflow)
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- return -ENOMEM;
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-
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- /* size of the areas */
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- cxt->struct_size = cxt->p - cxt->p_begin;
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- cxt->strings_size = cxt->pstr_begin - cxt->pstr;
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-
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- /* the offset we must move */
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- off = (cxt->pstr_begin - cxt->p_begin) - cxt->strings_size;
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-
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- /* the new strings start */
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- cxt->pstr_begin = cxt->p_begin + cxt->struct_size;
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-
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- /* move the whole string area */
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- memmove(cxt->pstr_begin, cxt->pstr, cxt->strings_size);
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- /* now perform the fixup of the strings */
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- p = cxt->p_begin;
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- while ((tag = be32_to_cpu(*(u32 *) p)) != OF_DT_END) {
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- p += 4;
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-
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- if (tag == OF_DT_BEGIN_NODE) {
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- p = (u8 *) _ALIGN((unsigned long)p + strlen(p) + 1, 4);
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- continue;
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- }
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-
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- if (tag == OF_DT_END_NODE || tag == OF_DT_NOP)
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- continue;
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-
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- if (tag != OF_DT_PROP)
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- return -EINVAL;
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-
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- sz = be32_to_cpu(*(u32 *) p);
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- p += 4;
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-
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- v = be32_to_cpu(*(u32 *) p);
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- v -= off;
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- *(u32 *) p = cpu_to_be32(v); /* move down */
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- p += 4;
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-
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- p = (u8 *) _ALIGN((unsigned long)p + sz, 4);
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- }
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-
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- /* fix sizes */
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- p = (char *)cxt->bph;
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- sz = (cxt->pstr_begin + cxt->strings_size) - p;
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- sz1 = _ALIGN(sz, 16); /* align at 16 bytes */
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- if (sz != sz1)
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- memset(p + sz, 0, sz1 - sz);
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- bph->totalsize = cpu_to_be32(sz1);
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- bph->off_dt_struct = cpu_to_be32(cxt->p_begin - p);
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- bph->off_dt_strings = cpu_to_be32(cxt->pstr_begin - p);
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-
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- /* the new strings start */
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- cxt->pstr_begin = cxt->p_begin + cxt->struct_size;
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- cxt->pstr = cxt->pstr_begin + cxt->strings_size;
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-
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- return 0;
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+ bph->totalsize = cxt->p_end - (u8 *)bph;
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+ bph->off_dt_struct = cxt->p_start - (u8 *)bph;
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+ bph->off_dt_strings = cxt->p - (u8 *)bph;
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+ bph->dt_strings_size = cxt->p_end - cxt->p;
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}
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-/**********************************************************************/
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-
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static inline int isprint(int c)
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{
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return c >= 0x20 && c <= 0x7e;
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@@ -381,8 +307,8 @@ void ft_dump_blob(const void *bphp)
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}
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if (tag != OF_DT_PROP) {
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- fprintf(stderr, "%*s ** Unknown tag 0x%08x\n",
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- depth * shift, "", tag);
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+ fprintf(stderr, "%*s ** Unknown tag 0x%08x at 0x%x\n",
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+ depth * shift, "", tag, --p);
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break;
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}
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sz = be32_to_cpu(*p++);
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@@ -397,64 +323,15 @@ void ft_dump_blob(const void *bphp)
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void ft_backtrack_node(struct ft_cxt *cxt)
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{
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- if (be32_to_cpu(*(u32 *) (cxt->p - 4)) != OF_DT_END_NODE)
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- return; /* XXX only for node */
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-
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- cxt->p -= 4;
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-}
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-
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-/* note that the root node of the blob is "peeled" off */
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-void ft_merge_blob(struct ft_cxt *cxt, void *blob)
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-{
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- struct boot_param_header *bph = (struct boot_param_header *)blob;
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- u32 *p_struct = (u32 *) ((char *)bph + be32_to_cpu(bph->off_dt_struct));
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- u32 *p_strings =
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- (u32 *) ((char *)bph + be32_to_cpu(bph->off_dt_strings));
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- u32 tag, *p;
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- char *s, *t;
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- int depth, sz;
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-
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- if (be32_to_cpu(*(u32 *) (cxt->p - 4)) != OF_DT_END_NODE)
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- return; /* XXX only for node */
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-
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- cxt->p -= 4;
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-
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- depth = 0;
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- p = p_struct;
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- while ((tag = be32_to_cpu(*p++)) != OF_DT_END) {
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-
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- /* printf("tag: 0x%08x (%d) - %d\n", tag, p - p_struct, depth); */
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-
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- if (tag == OF_DT_BEGIN_NODE) {
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- s = (char *)p;
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- p = (u32 *) _ALIGN((unsigned long)p + strlen(s) + 1, 4);
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-
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- if (depth++ > 0)
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- ft_begin_node(cxt, s);
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-
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- continue;
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- }
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-
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- if (tag == OF_DT_END_NODE) {
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- ft_end_node(cxt);
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- if (--depth == 0)
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- break;
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- continue;
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- }
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-
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- if (tag == OF_DT_NOP)
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- continue;
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+ int i = 4;
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- if (tag != OF_DT_PROP)
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- break;
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+ while (be32_to_cpu(*(u32 *) (cxt->p - i)) != OF_DT_END_NODE)
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+ i += 4;
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- sz = be32_to_cpu(*p++);
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- s = (char *)p_strings + be32_to_cpu(*p++);
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- t = (char *)p;
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- p = (u32 *) _ALIGN((unsigned long)p + sz, 4);
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+ memmove (cxt->p - i, cxt->p, cxt->p_end - cxt->p);
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- ft_prop(cxt, s, t, sz);
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- }
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+ cxt->p_end -= i;
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+ cxt->p -= i;
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}
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void *ft_get_prop(void *bphp, const char *propname, int *szp)
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@@ -521,9 +398,6 @@ void *ft_get_prop(void *bphp, const char *propname, int *szp)
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/********************************************************************/
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-extern unsigned char oftree_dtb[];
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-extern unsigned int oftree_dtb_len;
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-
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/* Function that returns a character from the environment */
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extern uchar(*env_get_char) (int);
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@@ -577,7 +451,7 @@ static const struct {
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};
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#endif
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-void ft_setup(void *blob, int size, bd_t * bd, ulong initrd_start, ulong initrd_end)
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+void ft_setup(void *blob, bd_t * bd, ulong initrd_start, ulong initrd_end)
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{
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u32 *p;
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int len;
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@@ -600,20 +474,16 @@ void ft_setup(void *blob, int size, bd_t * bd, ulong initrd_start, ulong initrd_
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return;
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}
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- ft_begin(&cxt, blob, size);
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+#ifdef DEBUG
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+ printf ("recieved oftree\n");
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+ ft_dump_blob(blob);
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+#endif
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+
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+ ft_init_cxt(&cxt, blob);
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if (initrd_start && initrd_end)
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ft_add_rsvmap(&cxt, initrd_start, initrd_end - initrd_start + 1);
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- ft_begin_tree(&cxt);
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-
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- ft_begin_node(&cxt, "");
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-
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- ft_end_node(&cxt);
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-
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- /* copy RO tree */
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- ft_merge_blob(&cxt, oftree_dtb);
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-
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/* back into root */
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ft_backtrack_node(&cxt);
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@@ -642,8 +512,8 @@ void ft_setup(void *blob, int size, bd_t * bd, ulong initrd_start, ulong initrd_
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#endif
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ft_begin_node(&cxt, "chosen");
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-
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ft_prop_str(&cxt, "name", "chosen");
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+
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ft_prop_str(&cxt, "bootargs", getenv("bootargs"));
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ft_prop_int(&cxt, "linux,platform", 0x600); /* what is this? */
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if (initrd_start && initrd_end) {
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@@ -659,11 +529,7 @@ void ft_setup(void *blob, int size, bd_t * bd, ulong initrd_start, ulong initrd_
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ft_end_node(&cxt); /* end root */
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ft_end_tree(&cxt);
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-
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- /*
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- printf("merged OF-tree\n");
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- ft_dump_blob(blob);
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- */
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+ ft_finalize_tree(&cxt);
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#ifdef CONFIG_OF_HAS_BD_T
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/* paste the bd_t at the end of the flat tree */
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@@ -712,11 +578,12 @@ void ft_setup(void *blob, int size, bd_t * bd, ulong initrd_start, ulong initrd_
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ft_board_setup(blob, bd);
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#endif
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- /*
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- printf("final OF-tree\n");
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- ft_dump_blob(blob);
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- */
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+ /* in case the size changed in the platform code */
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+ ft_finalize_tree(&cxt);
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+#ifdef DEBUG
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+ printf("final OF-tree\n");
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+ ft_dump_blob(blob);
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+#endif
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}
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-
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#endif
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