mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-08-21 01:18:52 +09:00
723 lines
15 KiB
C
723 lines
15 KiB
C
/*
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* OF flat tree builder
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*/
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#include <common.h>
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#include <malloc.h>
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#include <environment.h>
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#ifdef CONFIG_OF_FLAT_TREE
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#include <asm/errno.h>
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#include <stddef.h>
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#include <ft_build.h>
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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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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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/* 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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*(u32 *) cxt->p = cpu_to_be32(v);
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cxt->p += 4;
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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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if (cxt->overflow) /* do nothing */
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return;
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/* next pointer pos */
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p = (u8 *) _ALIGN((unsigned long)cxt->p + sz, 4);
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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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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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void ft_begin_node(struct ft_cxt *cxt, const char *name)
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{
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ft_put_word(cxt, OF_DT_BEGIN_NODE);
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ft_put_bin(cxt, name, strlen(name) + 1);
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}
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void ft_end_node(struct ft_cxt *cxt)
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{
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ft_put_word(cxt, OF_DT_END_NODE);
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}
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void ft_nop(struct ft_cxt *cxt)
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{
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ft_put_word(cxt, OF_DT_NOP);
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}
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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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if (strcmp(p, name) == 0)
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return p - cxt->p_begin;
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p += strlen(p) + 1;
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}
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return -1;
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}
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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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if (cxt->overflow)
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return;
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len = strlen(name) + 1;
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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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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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}
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/* now put offset from beginning of *STRUCTURE* */
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/* will be fixed up at the end */
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ft_put_word(cxt, OF_DT_PROP);
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ft_put_word(cxt, sz);
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ft_put_word(cxt, off);
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ft_put_bin(cxt, data, sz);
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}
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void ft_prop_str(struct ft_cxt *cxt, const char *name, const char *str)
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{
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ft_prop(cxt, name, str, strlen(str) + 1);
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}
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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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}
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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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{
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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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/* zero everything in the header area */
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memset(bph, 0, sizeof(*bph));
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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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/* 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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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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((u64 *) cxt->pres)[0] = 0; /* phys = 0, size = 0, terminate */
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((u64 *) cxt->pres)[1] = 0;
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cxt->p_anchor = cxt->pres + 16; /* over the terminator */
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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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{
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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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cxt->pres += 16; /* advance */
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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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/* keep track of size */
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cxt->res_size = cxt->pres + 16 - cxt->pres_begin;
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cxt->p_anchor = cxt->pres + 16; /* over the terminator */
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}
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void ft_begin_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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cxt->p = cxt->p_begin;
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cxt->pstr = cxt->pstr_begin;
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}
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int ft_end_tree(struct ft_cxt *cxt)
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{
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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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ft_put_word(cxt, OF_DT_END);
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if (cxt->overflow)
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return -ENOMEM;
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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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/* the offset we must move */
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off = (cxt->pstr_begin - cxt->p_begin) - cxt->strings_size;
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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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/* 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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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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if (tag == OF_DT_END_NODE || tag == OF_DT_NOP)
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continue;
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if (tag != OF_DT_PROP)
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return -EINVAL;
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sz = be32_to_cpu(*(u32 *) p);
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p += 4;
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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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p = (u8 *) _ALIGN((unsigned long)p + sz, 4);
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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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/* 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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return 0;
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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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}
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static int is_printable_string(const void *data, int len)
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{
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const char *s = data;
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const char *ss;
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/* zero length is not */
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if (len == 0)
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return 0;
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/* must terminate with zero */
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if (s[len - 1] != '\0')
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return 0;
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ss = s;
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while (*s && isprint(*s))
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s++;
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/* not zero, or not done yet */
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if (*s != '\0' || (s + 1 - ss) < len)
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return 0;
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return 1;
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}
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static void print_data(const void *data, int len)
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{
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int i;
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const u8 *s;
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/* no data, don't print */
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if (len == 0)
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return;
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if (is_printable_string(data, len)) {
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printf(" = \"%s\"", (char *)data);
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return;
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}
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switch (len) {
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case 1: /* byte */
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printf(" = <0x%02x>", (*(u8 *) data) & 0xff);
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break;
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case 2: /* half-word */
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printf(" = <0x%04x>", be16_to_cpu(*(u16 *) data) & 0xffff);
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break;
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case 4: /* word */
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printf(" = <0x%08x>", be32_to_cpu(*(u32 *) data) & 0xffffffffU);
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break;
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case 8: /* double-word */
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printf(" = <0x%16llx>", be64_to_cpu(*(uint64_t *) data));
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break;
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default: /* anything else... hexdump */
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printf(" = [");
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for (i = 0, s = data; i < len; i++)
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printf("%02x%s", s[i], i < len - 1 ? " " : "");
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printf("]");
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break;
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}
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}
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void ft_dump_blob(const void *bphp)
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{
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const struct boot_param_header *bph = bphp;
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const uint64_t *p_rsvmap = (const uint64_t *)
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((const char *)bph + be32_to_cpu(bph->off_mem_rsvmap));
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const u32 *p_struct = (const u32 *)
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((const char *)bph + be32_to_cpu(bph->off_dt_struct));
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const u32 *p_strings = (const u32 *)
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((const char *)bph + be32_to_cpu(bph->off_dt_strings));
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u32 tag;
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const u32 *p;
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const char *s, *t;
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int depth, sz, shift;
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int i;
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uint64_t addr, size;
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if (be32_to_cpu(bph->magic) != OF_DT_HEADER) {
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/* not valid tree */
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return;
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}
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depth = 0;
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shift = 4;
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for (i = 0;; i++) {
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addr = be64_to_cpu(p_rsvmap[i * 2]);
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size = be64_to_cpu(p_rsvmap[i * 2 + 1]);
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if (addr == 0 && size == 0)
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break;
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printf("/memreserve/ 0x%llx 0x%llx;\n", addr, size);
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}
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p = p_struct;
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while ((tag = be32_to_cpu(*p++)) != OF_DT_END) {
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/* printf("tag: 0x%08x (%d)\n", tag, p - p_struct); */
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if (tag == OF_DT_BEGIN_NODE) {
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s = (const char *)p;
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p = (u32 *) _ALIGN((unsigned long)p + strlen(s) + 1, 4);
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printf("%*s%s {\n", depth * shift, "", s);
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depth++;
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continue;
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}
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if (tag == OF_DT_END_NODE) {
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depth--;
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printf("%*s};\n", depth * shift, "");
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continue;
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}
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if (tag == OF_DT_NOP) {
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printf("%*s[NOP]\n", depth * shift, "");
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continue;
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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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break;
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}
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sz = be32_to_cpu(*p++);
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s = (const char *)p_strings + be32_to_cpu(*p++);
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t = (const char *)p;
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p = (const u32 *)_ALIGN((unsigned long)p + sz, 4);
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printf("%*s%s", depth * shift, "", s);
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print_data(t, sz);
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printf(";\n");
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}
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}
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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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cxt->p -= 4;
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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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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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cxt->p -= 4;
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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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/* printf("tag: 0x%08x (%d) - %d\n", tag, p - p_struct, depth); */
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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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if (depth++ > 0)
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ft_begin_node(cxt, s);
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continue;
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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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if (tag == OF_DT_NOP)
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continue;
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if (tag != OF_DT_PROP)
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break;
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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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ft_prop(cxt, s, t, sz);
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}
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}
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void *ft_get_prop(void *bphp, const char *propname, int *szp)
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{
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struct boot_param_header *bph = bphp;
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uint32_t *p_struct =
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(uint32_t *) ((char *)bph + be32_to_cpu(bph->off_dt_struct));
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uint32_t *p_strings =
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(uint32_t *) ((char *)bph + be32_to_cpu(bph->off_dt_strings));
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uint32_t version = be32_to_cpu(bph->version);
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uint32_t tag;
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uint32_t *p;
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char *s, *t;
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char *ss;
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int sz;
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static char path[256], prop[256];
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path[0] = '\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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if (tag == OF_DT_BEGIN_NODE) {
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s = (char *)p;
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p = (uint32_t *) _ALIGN((unsigned long)p + strlen(s) +
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1, 4);
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strcat(path, s);
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strcat(path, "/");
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continue;
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}
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if (tag == OF_DT_END_NODE) {
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path[strlen(path) - 1] = '\0';
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ss = strrchr(path, '/');
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if (ss != NULL)
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ss[1] = '\0';
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continue;
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}
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if (tag == OF_DT_NOP)
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continue;
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if (tag != OF_DT_PROP)
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break;
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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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if (version < 0x10 && sz >= 8)
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p = (uint32_t *) _ALIGN((unsigned long)p, 8);
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t = (char *)p;
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p = (uint32_t *) _ALIGN((unsigned long)p + sz, 4);
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strcpy(prop, path);
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strcat(prop, s);
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if (strcmp(prop, propname) == 0) {
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*szp = sz;
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return t;
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}
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}
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return NULL;
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}
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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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/* Function that returns a character from the environment */
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extern uchar(*env_get_char) (int);
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#define BDM(x) { .name = #x, .offset = offsetof(bd_t, bi_ ##x ) }
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#ifdef CONFIG_OF_HAS_BD_T
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static const struct {
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const char *name;
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int offset;
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} bd_map[] = {
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BDM(memstart),
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BDM(memsize),
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BDM(flashstart),
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BDM(flashsize),
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BDM(flashoffset),
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BDM(sramstart),
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BDM(sramsize),
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#if defined(CONFIG_5xx) || defined(CONFIG_8xx) || defined(CONFIG_8260) \
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|| defined(CONFIG_E500)
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BDM(immr_base),
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#endif
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#if defined(CONFIG_MPC5xxx)
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BDM(mbar_base),
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#endif
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#if defined(CONFIG_MPC83XX)
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BDM(immrbar),
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#endif
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#if defined(CONFIG_MPC8220)
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BDM(mbar_base),
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BDM(inpfreq),
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BDM(pcifreq),
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BDM(pevfreq),
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BDM(flbfreq),
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BDM(vcofreq),
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#endif
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BDM(bootflags),
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BDM(ip_addr),
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BDM(intfreq),
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BDM(busfreq),
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#ifdef CONFIG_CPM2
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BDM(cpmfreq),
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BDM(brgfreq),
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BDM(sccfreq),
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BDM(vco),
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#endif
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#if defined(CONFIG_MPC5xxx)
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BDM(ipbfreq),
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BDM(pcifreq),
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#endif
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BDM(baudrate),
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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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{
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u32 *p;
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int len;
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struct ft_cxt cxt;
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ulong clock;
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#if defined(CONFIG_OF_HAS_UBOOT_ENV)
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int k, nxt;
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#endif
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#if defined(CONFIG_OF_HAS_BD_T)
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u8 *end;
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#endif
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#if defined(CONFIG_OF_HAS_UBOOT_ENV) || defined(CONFIG_OF_HAS_BD_T)
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int i;
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static char tmpenv[256];
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#endif
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/* disable OF tree; booting old kernel */
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if (getenv("disable_of") != NULL) {
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memcpy(blob, bd, sizeof(*bd));
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return;
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}
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ft_begin(&cxt, blob, size);
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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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ft_begin_node(&cxt, "");
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ft_end_node(&cxt);
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/* copy RO tree */
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ft_merge_blob(&cxt, oftree_dtb);
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/* back into root */
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ft_backtrack_node(&cxt);
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#ifdef CONFIG_OF_HAS_UBOOT_ENV
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ft_begin_node(&cxt, "u-boot-env");
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for (i = 0; env_get_char(i) != '\0'; i = nxt + 1) {
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char *s, *lval, *rval;
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for (nxt = i; env_get_char(nxt) != '\0'; ++nxt) ;
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s = tmpenv;
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for (k = i; k < nxt && s < &tmpenv[sizeof(tmpenv) - 1]; ++k)
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*s++ = env_get_char(k);
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*s++ = '\0';
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lval = tmpenv;
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s = strchr(tmpenv, '=');
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if (s != NULL) {
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*s++ = '\0';
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rval = s;
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} else
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continue;
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ft_prop_str(&cxt, lval, rval);
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}
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ft_end_node(&cxt);
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#endif
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ft_begin_node(&cxt, "chosen");
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ft_prop_str(&cxt, "name", "chosen");
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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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ft_prop_int(&cxt, "linux,initrd-start", initrd_start);
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ft_prop_int(&cxt, "linux,initrd-end", initrd_end);
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}
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#ifdef OF_STDOUT_PATH
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ft_prop_str(&cxt, "linux,stdout-path", OF_STDOUT_PATH);
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#endif
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ft_end_node(&cxt);
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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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printf("merged OF-tree\n");
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ft_dump_blob(blob);
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*/
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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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end = (char *)blob +
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be32_to_cpu(((struct boot_param_header *)blob)->totalsize);
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memcpy(end, bd, sizeof(*bd));
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#endif
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#ifdef CONFIG_PPC
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#ifdef CONFIG_OF_HAS_BD_T
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for (i = 0; i < sizeof(bd_map)/sizeof(bd_map[0]); i++) {
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uint32_t v;
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sprintf(tmpenv, "/bd_t/%s", bd_map[i].name);
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v = *(uint32_t *)((char *)bd + bd_map[i].offset);
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p = ft_get_prop(blob, tmpenv, &len);
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if (p != NULL)
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*p = cpu_to_be32(v);
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}
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p = ft_get_prop(blob, "/bd_t/enetaddr", &len);
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if (p != NULL)
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memcpy(p, bd->bi_enetaddr, 6);
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p = ft_get_prop(blob, "/bd_t/ethspeed", &len);
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if (p != NULL)
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*p = cpu_to_be32((uint32_t) bd->bi_ethspeed);
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#endif
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clock = bd->bi_intfreq;
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p = ft_get_prop(blob, "/cpus/" OF_CPU "/clock-frequency", &len);
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if (p != NULL)
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*p = cpu_to_be32(clock);
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#ifdef OF_TBCLK
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clock = OF_TBCLK;
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p = ft_get_prop(blob, "/cpus/" OF_CPU "/timebase-frequency", &len);
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if (p != NULL)
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*p = cpu_to_be32(clock);
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#endif
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#endif /* __powerpc__ */
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#ifdef CONFIG_OF_BOARD_SETUP
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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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}
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#endif
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