Commit 169043d8 authored by Pantelis Antoniou's avatar Pantelis Antoniou Committed by Simon Glass

fit: Introduce methods for applying overlays on fit-load

Introduce an overlay based method for constructing a base DT blob
to pass to the kernel.

It is based on a specific method now to get the FDT from a FIT image
named boot_get_fdt_fit().
Signed-off-by: Pantelis Antoniou's avatarPantelis Antoniou <[email protected]>
Acked-by: default avatarSimon Glass <[email protected]>
parent 7c3dc776
......@@ -356,17 +356,16 @@ int boot_get_fdt(int flag, int argc, char * const argv[], uint8_t arch,
if (fit_check_format(buf)) {
ulong load, len;
fdt_noffset = fit_image_load(images,
fdt_noffset = boot_get_fdt_fit(images,
fdt_addr, &fit_uname_fdt,
&fit_uname_config,
arch, IH_TYPE_FLATDT,
BOOTSTAGE_ID_FIT_FDT_START,
FIT_LOAD_OPTIONAL, &load, &len);
arch, &load, &len);
images->fit_hdr_fdt = map_sysmem(fdt_addr, 0);
images->fit_uname_fdt = fit_uname_fdt;
images->fit_noffset_fdt = fdt_noffset;
fdt_addr = load;
break;
} else
#endif
......
......@@ -19,6 +19,7 @@
#include <errno.h>
#include <mapmem.h>
#include <asm/io.h>
#include <malloc.h>
DECLARE_GLOBAL_DATA_PTR;
#endif /* !USE_HOSTCC*/
......@@ -434,6 +435,10 @@ void fit_image_print(const void *fit, int image_noffset, const char *p)
printf("0x%08lx\n", load);
}
/* optional load address for FDT */
if (type == IH_TYPE_FLATDT && !fit_image_get_load(fit, image_noffset, &load))
printf("%s Load Address: 0x%08lx\n", p, load);
if ((type == IH_TYPE_KERNEL) || (type == IH_TYPE_STANDALONE) ||
(type == IH_TYPE_RAMDISK)) {
ret = fit_image_get_entry(fit, image_noffset, &entry);
......@@ -1454,6 +1459,8 @@ int fit_conf_get_node(const void *fit, const char *conf_uname)
{
int noffset, confs_noffset;
int len;
const char *s;
char *conf_uname_copy = NULL;
confs_noffset = fdt_path_offset(fit, FIT_CONFS_PATH);
if (confs_noffset < 0) {
......@@ -1475,12 +1482,29 @@ int fit_conf_get_node(const void *fit, const char *conf_uname)
debug("Found default configuration: '%s'\n", conf_uname);
}
s = strchr(conf_uname, '#');
if (s) {
len = s - conf_uname;
conf_uname_copy = malloc(len + 1);
if (!conf_uname_copy) {
debug("Can't allocate uname copy: '%s'\n",
conf_uname);
return -ENOMEM;
}
memcpy(conf_uname_copy, conf_uname, len);
conf_uname_copy[len] = '\0';
conf_uname = conf_uname_copy;
}
noffset = fdt_subnode_offset(fit, confs_noffset, conf_uname);
if (noffset < 0) {
debug("Can't get node offset for configuration unit name: '%s' (%s)\n",
conf_uname, fdt_strerror(noffset));
}
if (conf_uname_copy)
free(conf_uname_copy);
return noffset;
}
......@@ -1527,7 +1551,7 @@ void fit_conf_print(const void *fit, int noffset, const char *p)
char *desc;
const char *uname;
int ret;
int loadables_index;
int fdt_index, loadables_index;
/* Mandatory properties */
ret = fit_get_desc(fit, noffset, &desc);
......@@ -1549,9 +1573,17 @@ void fit_conf_print(const void *fit, int noffset, const char *p)
if (uname)
printf("%s Init Ramdisk: %s\n", p, uname);
uname = fdt_getprop(fit, noffset, FIT_FDT_PROP, NULL);
if (uname)
printf("%s FDT: %s\n", p, uname);
for (fdt_index = 0;
uname = fdt_stringlist_get(fit, noffset, FIT_FDT_PROP,
fdt_index, NULL), uname;
fdt_index++) {
if (fdt_index == 0)
printf("%s FDT: ", p);
else
printf("%s ", p);
printf("%s\n", uname);
}
uname = fdt_getprop(fit, noffset, FIT_FPGA_PROP, NULL);
if (uname)
......@@ -1888,3 +1920,144 @@ int boot_get_setup_fit(bootm_headers_t *images, uint8_t arch,
return ret;
}
#ifndef USE_HOSTCC
int boot_get_fdt_fit(bootm_headers_t *images, ulong addr,
const char **fit_unamep, const char **fit_uname_configp,
int arch, ulong *datap, ulong *lenp)
{
int fdt_noffset, cfg_noffset, count;
const void *fit;
const char *fit_uname = NULL;
const char *fit_uname_config = NULL;
char *fit_uname_config_copy = NULL;
char *next_config = NULL;
ulong load, len;
#ifdef CONFIG_OF_LIBFDT_OVERLAY
ulong image_start, image_end;
ulong ovload, ovlen;
const char *uconfig;
const char *uname;
void *base, *ov;
int i, err, noffset, ov_noffset;
#endif
fit_uname = fit_unamep ? *fit_unamep : NULL;
if (fit_uname_configp && *fit_uname_configp) {
fit_uname_config_copy = strdup(*fit_uname_configp);
if (!fit_uname_config_copy)
return -ENOMEM;
next_config = strchr(fit_uname_config_copy, '#');
if (next_config)
*next_config++ = '\0';
if (next_config - 1 > fit_uname_config_copy)
fit_uname_config = fit_uname_config_copy;
}
fdt_noffset = fit_image_load(images,
addr, &fit_uname, &fit_uname_config,
arch, IH_TYPE_FLATDT,
BOOTSTAGE_ID_FIT_FDT_START,
FIT_LOAD_OPTIONAL, &load, &len);
if (fdt_noffset < 0)
goto out;
debug("fit_uname=%s, fit_uname_config=%s\n",
fit_uname ? fit_uname : "<NULL>",
fit_uname_config ? fit_uname_config : "<NULL>");
fit = map_sysmem(addr, 0);
cfg_noffset = fit_conf_get_node(fit, fit_uname_config);
/* single blob, or error just return as well */
count = fit_conf_get_prop_node_count(fit, cfg_noffset, FIT_FDT_PROP);
if (count <= 1 && !next_config)
goto out;
/* we need to apply overlays */
#ifdef CONFIG_OF_LIBFDT_OVERLAY
image_start = addr;
image_end = addr + fit_get_size(fit);
/* verify that relocation took place by load address not being in fit */
if (load >= image_start && load < image_end) {
/* check is simplified; fit load checks for overlaps */
printf("Overlayed FDT requires relocation\n");
fdt_noffset = -EBADF;
goto out;
}
base = map_sysmem(load, len);
/* apply extra configs in FIT first, followed by args */
for (i = 1; ; i++) {
if (i < count) {
noffset = fit_conf_get_prop_node_index(fit, cfg_noffset,
FIT_FDT_PROP, i);
uname = fit_get_name(fit, noffset, NULL);
uconfig = NULL;
} else {
if (!next_config)
break;
uconfig = next_config;
next_config = strchr(next_config, '#');
if (next_config)
*next_config++ = '\0';
uname = NULL;
}
debug("%d: using uname=%s uconfig=%s\n", i, uname, uconfig);
ov_noffset = fit_image_load(images,
addr, &uname, &uconfig,
arch, IH_TYPE_FLATDT,
BOOTSTAGE_ID_FIT_FDT_START,
FIT_LOAD_REQUIRED, &ovload, &ovlen);
if (ov_noffset < 0) {
printf("load of %s failed\n", uname);
continue;
}
debug("%s loaded at 0x%08lx len=0x%08lx\n",
uname, ovload, ovlen);
ov = map_sysmem(ovload, ovlen);
base = map_sysmem(load, len + ovlen);
err = fdt_open_into(base, base, len + ovlen);
if (err < 0) {
printf("failed on fdt_open_into\n");
fdt_noffset = err;
goto out;
}
/* the verbose method prints out messages on error */
err = fdt_overlay_apply_verbose(base, ov);
if (err < 0) {
fdt_noffset = err;
goto out;
}
fdt_pack(base);
len = fdt_totalsize(base);
}
#else
printf("config with overlays but CONFIG_OF_LIBFDT_OVERLAY not set\n");
fdt_noffset = -EBADF;
#endif
out:
if (datap)
*datap = load;
if (lenp)
*lenp = len;
if (fit_unamep)
*fit_unamep = fit_uname;
if (fit_uname_configp)
*fit_uname_configp = fit_uname_config;
if (fit_uname_config_copy)
free(fit_uname_config_copy);
return fdt_noffset;
}
#endif
......@@ -593,6 +593,31 @@ int boot_get_loadable(int argc, char * const argv[], bootm_headers_t *images,
int boot_get_setup_fit(bootm_headers_t *images, uint8_t arch,
ulong *setup_start, ulong *setup_len);
/**
* boot_get_fdt_fit() - load a DTB from a FIT file (applying overlays)
*
* This deals with all aspects of loading an DTB from a FIT.
* The correct base image based on configuration will be selected, and
* then any overlays specified will be applied (as present in fit_uname_configp).
*
* @param images Boot images structure
* @param addr Address of FIT in memory
* @param fit_unamep On entry this is the requested image name
* (e.g. "[email protected]") or NULL to use the default. On exit
* points to the selected image name
* @param fit_uname_configp On entry this is the requested configuration
* name (e.g. "[email protected]") or NULL to use the default. On
* exit points to the selected configuration name.
* @param arch Expected architecture (IH_ARCH_...)
* @param datap Returns address of loaded image
* @param lenp Returns length of loaded image
*
* @return node offset of base image, or -ve error code on error
*/
int boot_get_fdt_fit(bootm_headers_t *images, ulong addr,
const char **fit_unamep, const char **fit_uname_configp,
int arch, ulong *datap, ulong *lenp);
/**
* fit_image_load() - load an image from a FIT
*
......
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