dany/u-boot-megous
1
0
Fork 0
mirror of https://xff.cz/git/u-boot/ synced 2025-09-01 16:52:14 +02:00
Code Issues Packages Projects Releases Wiki Activity

fdtdec: Implement carveout support functions

Browse Source 
The fdtdec_get_carveout() and fdtdec_set_carveout() function can be used
to read a carveout from a given node or add a carveout to a given node
using the standard device tree bindings (involving reserved-memory nodes
and the memory-region property).

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Thierry Reding <treding@nvidia.com>
This commit is contained in:
Thierry Reding
2019-03-21 19:10:03 +01:00
committed by Simon Glass
parent c9222a08b3
commit 16523ac790
2 changed files with 168 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

87
lib/fdtdec.c
View File

@@ -1399,6 +1399,93 @@ int fdtdec_add_reserved_memory(void *blob, const char *basename,
return 0;
}
int fdtdec_get_carveout(const void *blob, const char *node, const char *name,
unsigned int index, struct fdt_memory *carveout)
{
const fdt32_t *prop;
uint32_t phandle;
int offset, len;
fdt_size_t size;
offset = fdt_path_offset(blob, node);
if (offset < 0)
return offset;
prop = fdt_getprop(blob, offset, name, &len);
if (!prop) {
debug("failed to get %s for %s\n", name, node);
return -FDT_ERR_NOTFOUND;
}
if ((len % sizeof(phandle)) != 0) {
debug("invalid phandle property\n");
return -FDT_ERR_BADPHANDLE;
}
if (len < (sizeof(phandle) * (index + 1))) {
debug("invalid phandle index\n");
return -FDT_ERR_BADPHANDLE;
}
phandle = fdt32_to_cpu(prop[index]);
offset = fdt_node_offset_by_phandle(blob, phandle);
if (offset < 0) {
debug("failed to find node for phandle %u\n", phandle);
return offset;
}
carveout->start = fdtdec_get_addr_size_auto_noparent(blob, offset,
"reg", 0, &size,
true);
if (carveout->start == FDT_ADDR_T_NONE) {
debug("failed to read address/size from \"reg\" property\n");
return -FDT_ERR_NOTFOUND;
}
carveout->end = carveout->start + size - 1;
return 0;
}
int fdtdec_set_carveout(void *blob, const char *node, const char *prop_name,
unsigned int index, const char *name,
const struct fdt_memory *carveout)
{
uint32_t phandle;
int err, offset;
fdt32_t value;
/* XXX implement support for multiple phandles */
if (index > 0) {
debug("invalid index %u\n", index);
return -FDT_ERR_BADOFFSET;
}
err = fdtdec_add_reserved_memory(blob, name, carveout, &phandle);
if (err < 0) {
debug("failed to add reserved memory: %d\n", err);
return err;
}
offset = fdt_path_offset(blob, node);
if (offset < 0) {
debug("failed to find offset for node %s: %d\n", node, offset);
return offset;
}
value = cpu_to_fdt32(phandle);
err = fdt_setprop(blob, offset, prop_name, &value, sizeof(value));
if (err < 0) {
debug("failed to set %s property for node %s: %d\n", prop_name,
node, err);
return err;
}
return 0;
}
int fdtdec_setup(void)
{
#if CONFIG_IS_ENABLED(OF_CONTROL)