489 lines
12 KiB
C
489 lines
12 KiB
C
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/*
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* (C) Copyright 2007-2012
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* Allwinner Technology Co., Ltd. <www.allwinnertech.com>
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* Tom weidonghui <weidonghui@allwinnertech.com>
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*/
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#include "libfdt_env.h"
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#include <fdt.h>
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#include <libfdt.h>
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#include "libfdt_internal.h"
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static int fdt_blocks_misordered_(const void *fdt, int mem_rsv_size,
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int struct_size)
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{
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return (fdt_off_mem_rsvmap(fdt) <
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FDT_ALIGN(sizeof(struct fdt_header), 8)) ||
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(fdt_off_dt_struct(fdt) <
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(fdt_off_mem_rsvmap(fdt) + mem_rsv_size)) ||
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(fdt_off_dt_strings(fdt) <
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(fdt_off_dt_struct(fdt) + struct_size)) ||
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(fdt_totalsize(fdt) <
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(fdt_off_dt_strings(fdt) + fdt_size_dt_strings(fdt)));
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}
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static int fdt_rw_check_header_(void *fdt)
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{
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FDT_CHECK_HEADER(fdt);
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if (fdt_version(fdt) < 17)
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return -FDT_ERR_BADVERSION;
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if (fdt_blocks_misordered_(fdt, sizeof(struct fdt_reserve_entry),
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fdt_size_dt_struct(fdt)))
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return -FDT_ERR_BADLAYOUT;
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if (fdt_version(fdt) > 17)
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fdt_set_version(fdt, 17);
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return 0;
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}
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#define FDT_RW_CHECK_HEADER(fdt) \
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{ \
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int err_ = fdt_rw_check_header_(fdt); \
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if (err_ != 0) \
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return err_; \
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}
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static inline int fdt_data_size_(void *fdt)
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{
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return fdt_off_dt_strings(fdt) + fdt_size_dt_strings(fdt);
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}
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static int fdt_splice_(void *fdt, void *splicepoint, int oldlen, int newlen)
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{
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char *p = splicepoint;
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char *end = (char *)fdt + fdt_data_size_(fdt);
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if (((p + oldlen) < p) || ((p + oldlen) > end))
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return -FDT_ERR_BADOFFSET;
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if ((p < (char *)fdt) || ((end - oldlen + newlen) < (char *)fdt))
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return -FDT_ERR_BADOFFSET;
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if ((end - oldlen + newlen) > ((char *)fdt + fdt_totalsize(fdt)))
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return -FDT_ERR_NOSPACE;
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fdt_memmove(p + newlen, p + oldlen, end - p - oldlen);
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return 0;
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}
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static int fdt_splice_mem_rsv_(void *fdt, struct fdt_reserve_entry *p, int oldn,
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int newn)
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{
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int delta = (newn - oldn) * sizeof(*p);
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int err;
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err = fdt_splice_(fdt, p, oldn * sizeof(*p), newn * sizeof(*p));
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if (err)
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return err;
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fdt_set_off_dt_struct(fdt, fdt_off_dt_struct(fdt) + delta);
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fdt_set_off_dt_strings(fdt, fdt_off_dt_strings(fdt) + delta);
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return 0;
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}
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static int fdt_splice_struct_(void *fdt, void *p, int oldlen, int newlen)
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{
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int delta = newlen - oldlen;
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int err = fdt_splice_(fdt, p, oldlen, newlen);
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if (err)
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return err;
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fdt_set_size_dt_struct(fdt, fdt_size_dt_struct(fdt) + delta);
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fdt_set_off_dt_strings(fdt, fdt_off_dt_strings(fdt) + delta);
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return 0;
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}
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static int fdt_splice_string_(void *fdt, int newlen)
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{
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void *p = (char *)fdt + fdt_off_dt_strings(fdt) +
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fdt_size_dt_strings(fdt);
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int err = fdt_splice_(fdt, p, 0, newlen);
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if (err)
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return err;
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fdt_set_size_dt_strings(fdt, fdt_size_dt_strings(fdt) + newlen);
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return 0;
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}
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static int fdt_find_add_string_(void *fdt, const char *s)
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{
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char *strtab = (char *)fdt + fdt_off_dt_strings(fdt);
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const char *p;
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char *new;
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int len = strlen(s) + 1;
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int err;
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p = fdt_find_string_(strtab, fdt_size_dt_strings(fdt), s);
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if (p)
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/* found it */
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return (p - strtab);
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new = strtab + fdt_size_dt_strings(fdt);
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err = fdt_splice_string_(fdt, len);
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if (err)
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return err;
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memcpy(new, s, len);
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return (new - strtab);
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}
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int fdt_add_mem_rsv(void *fdt, uint64_t address, uint64_t size)
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{
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struct fdt_reserve_entry *re;
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int err;
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FDT_RW_CHECK_HEADER(fdt);
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re = fdt_mem_rsv_w_(fdt, fdt_num_mem_rsv(fdt));
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err = fdt_splice_mem_rsv_(fdt, re, 0, 1);
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if (err)
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return err;
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re->address = cpu_to_fdt64(address);
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re->size = cpu_to_fdt64(size);
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return 0;
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}
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int fdt_del_mem_rsv(void *fdt, int n)
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{
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struct fdt_reserve_entry *re = fdt_mem_rsv_w_(fdt, n);
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FDT_RW_CHECK_HEADER(fdt);
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if (n >= fdt_num_mem_rsv(fdt))
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return -FDT_ERR_NOTFOUND;
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return fdt_splice_mem_rsv_(fdt, re, 1, 0);
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}
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static int fdt_resize_property_(void *fdt, int nodeoffset, const char *name,
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int len, struct fdt_property **prop)
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{
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int oldlen;
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int err;
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*prop = fdt_get_property_w(fdt, nodeoffset, name, &oldlen);
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if (!*prop)
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return oldlen;
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err = fdt_splice_struct_(fdt, (*prop)->data, FDT_TAGALIGN(oldlen), FDT_TAGALIGN(len));
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if (err)
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return err;
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(*prop)->len = cpu_to_fdt32(len);
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return 0;
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}
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static int fdt_add_property_(void *fdt, int nodeoffset, const char *name,
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int len, struct fdt_property **prop)
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{
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int proplen;
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int nextoffset = fdt_check_node_offset_(fdt, nodeoffset);
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int namestroff;
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int err;
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if (nextoffset < 0)
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return nextoffset;
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namestroff = fdt_find_add_string_(fdt, name);
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if (namestroff < 0)
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return namestroff;
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*prop = fdt_offset_ptr_w_(fdt, nextoffset);
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proplen = sizeof(**prop) + FDT_TAGALIGN(len);
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err = fdt_splice_struct_(fdt, *prop, 0, proplen);
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if (err)
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return err;
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(*prop)->tag = cpu_to_fdt32(FDT_PROP);
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(*prop)->nameoff = cpu_to_fdt32(namestroff);
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(*prop)->len = cpu_to_fdt32(len);
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return 0;
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}
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int fdt_set_name(void *fdt, int nodeoffset, const char *name)
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{
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char *namep;
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int oldlen, newlen;
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int err;
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FDT_RW_CHECK_HEADER(fdt);
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namep = (char *)(uintptr_t)fdt_get_name(fdt, nodeoffset, &oldlen);
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if (!namep)
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return oldlen;
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newlen = strlen(name);
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err = fdt_splice_struct_(fdt, namep, FDT_TAGALIGN(oldlen + 1),
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FDT_TAGALIGN(newlen + 1));
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if (err)
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return err;
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memcpy(namep, name, newlen + 1);
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return 0;
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}
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int fdt_setprop_placeholder(void *fdt, int nodeoffset, const char *name,
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int len, void **prop_data)
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{
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struct fdt_property *prop;
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int err;
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FDT_RW_CHECK_HEADER(fdt);
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err = fdt_resize_property_(fdt, nodeoffset, name, len, &prop);
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if (err == -FDT_ERR_NOTFOUND)
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err = fdt_add_property_(fdt, nodeoffset, name, len, &prop);
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if (err)
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return err;
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*prop_data = prop->data;
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return 0;
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}
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int fdt_setprop(void *fdt, int nodeoffset, const char *name, const void *val,
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int len)
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{
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void *prop_data;
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int err;
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err = fdt_setprop_placeholder(fdt, nodeoffset, name, len, &prop_data);
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if (err)
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return err;
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if (len)
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memcpy(prop_data, val, len);
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return 0;
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}
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int fdt_appendprop(void *fdt, int nodeoffset, const char *name, const void *val,
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int len)
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{
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struct fdt_property *prop;
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int err, oldlen, newlen;
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FDT_RW_CHECK_HEADER(fdt);
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prop = fdt_get_property_w(fdt, nodeoffset, name, &oldlen);
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if (prop) {
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newlen = len + oldlen;
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err = fdt_splice_struct_(fdt, prop->data, FDT_TAGALIGN(oldlen),
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FDT_TAGALIGN(newlen));
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if (err)
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return err;
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prop->len = cpu_to_fdt32(newlen);
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memcpy(prop->data + oldlen, val, len);
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} else {
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err = fdt_add_property_(fdt, nodeoffset, name, len, &prop);
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if (err)
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return err;
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memcpy(prop->data, val, len);
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}
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return 0;
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}
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int fdt_delprop(void *fdt, int nodeoffset, const char *name)
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{
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struct fdt_property *prop;
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int len, proplen;
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FDT_RW_CHECK_HEADER(fdt);
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prop = fdt_get_property_w(fdt, nodeoffset, name, &len);
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if (!prop)
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return len;
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proplen = sizeof(*prop) + FDT_TAGALIGN(len);
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return fdt_splice_struct_(fdt, prop, proplen, 0);
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}
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int fdt_add_subnode_namelen(void *fdt, int parentoffset, const char *name,
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int namelen)
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{
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struct fdt_node_header *nh;
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int offset, nextoffset;
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int nodelen;
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int err;
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uint32_t tag;
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fdt32_t *endtag;
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FDT_RW_CHECK_HEADER(fdt);
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offset = fdt_subnode_offset_namelen(fdt, parentoffset, name, namelen);
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if (offset >= 0)
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return -FDT_ERR_EXISTS;
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else if (offset != -FDT_ERR_NOTFOUND)
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return offset;
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/* Try to place the new node after the parent's properties */
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fdt_next_tag(fdt, parentoffset, &nextoffset); /* skip the BEGIN_NODE */
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do {
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offset = nextoffset;
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tag = fdt_next_tag(fdt, offset, &nextoffset);
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} while ((tag == FDT_PROP) || (tag == FDT_NOP));
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nh = fdt_offset_ptr_w_(fdt, offset);
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nodelen = sizeof(*nh) + FDT_TAGALIGN(namelen + 1) + FDT_TAGSIZE;
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err = fdt_splice_struct_(fdt, nh, 0, nodelen);
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if (err)
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return err;
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nh->tag = cpu_to_fdt32(FDT_BEGIN_NODE);
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memset(nh->name, 0, FDT_TAGALIGN(namelen + 1));
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memcpy(nh->name, name, namelen);
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endtag = (fdt32_t *)((char *)nh + nodelen - FDT_TAGSIZE);
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*endtag = cpu_to_fdt32(FDT_END_NODE);
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return offset;
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}
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int fdt_add_subnode(void *fdt, int parentoffset, const char *name)
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{
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return fdt_add_subnode_namelen(fdt, parentoffset, name, strlen(name));
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}
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int fdt_del_node(void *fdt, int nodeoffset)
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{
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int endoffset;
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FDT_RW_CHECK_HEADER(fdt);
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endoffset = fdt_node_end_offset_(fdt, nodeoffset);
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if (endoffset < 0)
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return endoffset;
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return fdt_splice_struct_(fdt, fdt_offset_ptr_w_(fdt, nodeoffset),
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endoffset - nodeoffset, 0);
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}
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static void fdt_packblocks_(const char *old, char *new, int mem_rsv_size,
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int struct_size)
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{
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int mem_rsv_off, struct_off, strings_off;
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mem_rsv_off = FDT_ALIGN(sizeof(struct fdt_header), 8);
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struct_off = mem_rsv_off + mem_rsv_size;
|
||
|
|
strings_off = struct_off + struct_size;
|
||
|
|
|
||
|
|
fdt_memmove(new + mem_rsv_off, old + fdt_off_mem_rsvmap(old), mem_rsv_size);
|
||
|
|
fdt_set_off_mem_rsvmap(new, mem_rsv_off);
|
||
|
|
|
||
|
|
fdt_memmove(new + struct_off, old + fdt_off_dt_struct(old), struct_size);
|
||
|
|
fdt_set_off_dt_struct(new, struct_off);
|
||
|
|
fdt_set_size_dt_struct(new, struct_size);
|
||
|
|
|
||
|
|
fdt_memmove(new + strings_off, old + fdt_off_dt_strings(old),
|
||
|
|
fdt_size_dt_strings(old));
|
||
|
|
fdt_set_off_dt_strings(new, strings_off);
|
||
|
|
fdt_set_size_dt_strings(new, fdt_size_dt_strings(old));
|
||
|
|
}
|
||
|
|
|
||
|
|
int fdt_open_into(const void *fdt, void *buf, int bufsize)
|
||
|
|
{
|
||
|
|
int err;
|
||
|
|
int mem_rsv_size, struct_size;
|
||
|
|
int newsize;
|
||
|
|
const char *fdtstart = fdt;
|
||
|
|
const char *fdtend = fdtstart + fdt_totalsize(fdt);
|
||
|
|
char *tmp;
|
||
|
|
|
||
|
|
FDT_CHECK_HEADER(fdt);
|
||
|
|
|
||
|
|
mem_rsv_size =
|
||
|
|
(fdt_num_mem_rsv(fdt) + 1) * sizeof(struct fdt_reserve_entry);
|
||
|
|
|
||
|
|
if (fdt_version(fdt) >= 17) {
|
||
|
|
struct_size = fdt_size_dt_struct(fdt);
|
||
|
|
} else {
|
||
|
|
struct_size = 0;
|
||
|
|
while (fdt_next_tag(fdt, struct_size, &struct_size) != FDT_END)
|
||
|
|
;
|
||
|
|
if (struct_size < 0)
|
||
|
|
return struct_size;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!fdt_blocks_misordered_(fdt, mem_rsv_size, struct_size)) {
|
||
|
|
/* no further work necessary */
|
||
|
|
err = fdt_move(fdt, buf, bufsize);
|
||
|
|
if (err)
|
||
|
|
return err;
|
||
|
|
fdt_set_version(buf, 17);
|
||
|
|
fdt_set_size_dt_struct(buf, struct_size);
|
||
|
|
fdt_set_totalsize(buf, bufsize);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Need to reorder */
|
||
|
|
newsize = FDT_ALIGN(sizeof(struct fdt_header), 8) + mem_rsv_size +
|
||
|
|
struct_size + fdt_size_dt_strings(fdt);
|
||
|
|
|
||
|
|
if (bufsize < newsize)
|
||
|
|
return -FDT_ERR_NOSPACE;
|
||
|
|
|
||
|
|
/* First attempt to build converted tree at beginning of buffer */
|
||
|
|
tmp = buf;
|
||
|
|
/* But if that overlaps with the old tree... */
|
||
|
|
if (((tmp + newsize) > fdtstart) && (tmp < fdtend)) {
|
||
|
|
/* Try right after the old tree instead */
|
||
|
|
tmp = (char *)(uintptr_t)fdtend;
|
||
|
|
if ((tmp + newsize) > ((char *)buf + bufsize))
|
||
|
|
return -FDT_ERR_NOSPACE;
|
||
|
|
}
|
||
|
|
|
||
|
|
fdt_packblocks_(fdt, tmp, mem_rsv_size, struct_size);
|
||
|
|
fdt_memmove(buf, tmp, newsize);
|
||
|
|
|
||
|
|
fdt_set_magic(buf, FDT_MAGIC);
|
||
|
|
fdt_set_totalsize(buf, bufsize);
|
||
|
|
fdt_set_version(buf, 17);
|
||
|
|
fdt_set_last_comp_version(buf, 16);
|
||
|
|
fdt_set_boot_cpuid_phys(buf, fdt_boot_cpuid_phys(fdt));
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
int fdt_pack(void *fdt)
|
||
|
|
{
|
||
|
|
int mem_rsv_size;
|
||
|
|
|
||
|
|
FDT_RW_CHECK_HEADER(fdt);
|
||
|
|
|
||
|
|
mem_rsv_size =
|
||
|
|
(fdt_num_mem_rsv(fdt) + 1) * sizeof(struct fdt_reserve_entry);
|
||
|
|
fdt_packblocks_(fdt, fdt, mem_rsv_size, fdt_size_dt_struct(fdt));
|
||
|
|
fdt_set_totalsize(fdt, fdt_data_size_(fdt));
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* fdt_getprop_u32 - Find a node and return it's property or a default
|
||
|
|
*
|
||
|
|
* @fdt: ptr to device tree
|
||
|
|
* @nodeoffset: by fdt_path_offset() function
|
||
|
|
* @prop: property name
|
||
|
|
* @val: return value if the property is found
|
||
|
|
* @note return value is the num of the u32 element
|
||
|
|
*/
|
||
|
|
int fdt_getprop_u32(const void *fdt, int nodeoffset, const char *prop,
|
||
|
|
uint32_t *val)
|
||
|
|
{
|
||
|
|
int len;
|
||
|
|
const fdt32_t *data = NULL;
|
||
|
|
|
||
|
|
data = fdt_getprop(fdt, nodeoffset, prop, &len);
|
||
|
|
if ((data == NULL) || (len == 0) || (len % 4 != 0)) {
|
||
|
|
return -FDT_ERR_INTERNAL;
|
||
|
|
}
|
||
|
|
if (val != NULL) {
|
||
|
|
const uint32_t *p = data;
|
||
|
|
int j;
|
||
|
|
for (j = 0, p = data; j < len / 4; j++) {
|
||
|
|
*val = fdt32_to_cpu(p[j]);
|
||
|
|
val++;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return len / 4;
|
||
|
|
}
|