Mirrors/u-boot
2
0
Fork 0
mirror of https://github.com/AsahiLinux/u-boot synced 2024-11-29 08:01:08 +00:00
Code Issues Projects Releases Packages Wiki Activity

Add some utilities to manipulate the reserved memory map.

Browse source
This commit is contained in:
Gerald Van Baren 2007-04-14 22:46:41 -04:00
parent 64dbbd40c5
commit 3f9f08cf91
3 changed files with 103 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

5
include/libfdt.h
View file

@ -86,6 +86,8 @@ void *fdt_getprop(const void *fdt, int nodeoffset,
uint32_t fdt_next_tag(const void *fdt, int offset,
int *nextoffset, char **namep);
int fdt_num_reservemap(void *fdt, int *used, int *total);
int fdt_get_reservemap(void *fdt, int n, struct fdt_reserve_entry *re);
/* Write-in-place functions */
int fdt_setprop_inplace(void *fdt, int nodeoffset, const char *name,
@ -99,6 +101,8 @@ int fdt_setprop_inplace(void *fdt, int nodeoffset, const char *name,
int fdt_nop_property(void *fdt, int nodeoffset, const char *name);
int fdt_nop_node(void *fdt, int nodeoffset);
int fdt_insert_reservemap_entry(void *fdt, int n, uint64_t addr, uint64_t size);
/* Sequential-write functions */
int fdt_create(void *buf, int bufsize);
@ -115,6 +119,7 @@ int fdt_property(void *fdt, const char *name, const void *val, int len);
fdt_property(fdt, name, str, strlen(str)+1)
int fdt_end_node(void *fdt);
int fdt_finish(void *fdt);
int fdt_replace_reservemap_entry(void *fdt, int n, uint64_t addr, uint64_t size);
/* Read-write functions */
int fdt_open_into(void *fdt, void *buf, int bufsize);

72
libfdt/fdt_ro.c
View file

@ -329,3 +329,75 @@ uint32_t fdt_next_tag(const void *fdt, int offset, int *nextoffset, char **namep
return tag;
}
/*
* Return the number of used reserve map entries and total slots available.
*/
int fdt_num_reservemap(void *fdt, int *used, int *total)
{
struct fdt_reserve_entry *re;
int start;
int end;
int err = fdt_check_header(fdt);
if (err != 0)
return err;
start = fdt_off_mem_rsvmap(fdt);
/*
* Convention is that the reserve map is before the dt_struct,
* but it does not have to be.
*/
end = fdt_totalsize(fdt);
if (end > fdt_off_dt_struct(fdt))
end = fdt_off_dt_struct(fdt);
if (end > fdt_off_dt_strings(fdt))
end = fdt_off_dt_strings(fdt);
/*
* Since the reserved area list is zero terminated, you get one fewer.
*/
if (total)
*total = ((end - start) / sizeof(struct fdt_reserve_entry)) - 1;
if (used) {
*used = 0;
while (start < end) {
re = (struct fdt_reserve_entry *)(fdt + start);
if (re->size == 0)
return 0; /* zero size terminates the list */
*used += 1;
start += sizeof(struct fdt_reserve_entry);
}
/*
* If we get here, there was no zero size termination.
*/
return -FDT_ERR_BADLAYOUT;
}
return 0;
}
/*
* Return the nth reserve map entry.
*/
int fdt_get_reservemap(void *fdt, int n, struct fdt_reserve_entry *re)
{
int used;
int total;
int err;
err = fdt_num_reservemap(fdt, &used, &total);
if (err != 0)
return err;
if (n >= total)
return -FDT_ERR_NOSPACE;
if (re) {
*re = *(struct fdt_reserve_entry *)
_fdt_offset_ptr(fdt, n * sizeof(struct fdt_reserve_entry));
}
return 0;
}

26
libfdt/fdt_wip.c
View file

@ -110,3 +110,29 @@ int fdt_nop_node(void *fdt, int nodeoffset)
nop_region(fdt_offset_ptr(fdt, nodeoffset, 0), endoffset - nodeoffset);
return 0;
}
/*
* Replace a reserve map entry in the nth slot.
*/
int fdt_replace_reservemap_entry(void *fdt, int n, uint64_t addr, uint64_t size)
{
struct fdt_reserve_entry *re;
int used;
int total;
int err;
err = fdt_num_reservemap(fdt, &used, &total);
if (err != 0)
return err;
if (n >= total)
return -FDT_ERR_NOSPACE;
re = (struct fdt_reserve_entry *)
(fdt + fdt_off_mem_rsvmap(fdt) +
(n * sizeof(struct fdt_reserve_entry)));
re->address = cpu_to_fdt64(addr);
re->size = cpu_to_fdt64(size);
return 0;
}