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qemu/hw/core/loader-fit.c
Chetan Pant 4a129ccdf2 hw/mips/boston: Fix Lesser GPL version number 
There is no "version 2" of the "Lesser" General Public License.
It is either "GPL version 2.0" or "Lesser GPL version 2.1".
This patch replaces all occurrences of "Lesser GPL version 2" with
"Lesser GPL version 2.1" in comment section.

Signed-off-by: Chetan Pant <chetan4windows@gmail.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-Id: <20201023122633.19466-1-chetan4windows@gmail.com>
[PMD: Added hw/mips/ prefix in subject]
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
2020-11-03 16:51:13 +01:00

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/*
* Flattened Image Tree loader.
*
* Copyright (c) 2016 Imagination Technologies
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "qapi/error.h"
#include "qemu/units.h"
#include "exec/memory.h"
#include "hw/loader.h"
#include "hw/loader-fit.h"
#include "qemu/cutils.h"
#include "qemu/error-report.h"
#include "sysemu/device_tree.h"
#include <libfdt.h>
#include <zlib.h>
#define FIT_LOADER_MAX_PATH (128)
static const void *fit_load_image_alloc(const void *itb, const char *name,
int *poff, size_t *psz, Error **errp)
{
const void *data;
const char *comp;
void *uncomp_data;
char path[FIT_LOADER_MAX_PATH];
int off, sz;
ssize_t uncomp_len;
snprintf(path, sizeof(path), "/images/%s", name);
off = fdt_path_offset(itb, path);
if (off < 0) {
error_setg(errp, "can't find node %s", path);
return NULL;
}
if (poff) {
*poff = off;
}
data = fdt_getprop(itb, off, "data", &sz);
if (!data) {
error_setg(errp, "can't get %s/data", path);
return NULL;
}
comp = fdt_getprop(itb, off, "compression", NULL);
if (!comp || !strcmp(comp, "none")) {
if (psz) {
*psz = sz;
}
uncomp_data = g_malloc(sz);
memmove(uncomp_data, data, sz);
return uncomp_data;
}
if (!strcmp(comp, "gzip")) {
uncomp_len = UBOOT_MAX_GUNZIP_BYTES;
uncomp_data = g_malloc(uncomp_len);
uncomp_len = gunzip(uncomp_data, uncomp_len, (void *) data, sz);
if (uncomp_len < 0) {
error_setg(errp, "unable to decompress %s image", name);
g_free(uncomp_data);
return NULL;
}
data = g_realloc(uncomp_data, uncomp_len);
if (psz) {
*psz = uncomp_len;
}
return data;
}
error_setg(errp, "unknown compression '%s'", comp);
return NULL;
}
static int fit_image_addr(const void *itb, int img, const char *name,
hwaddr *addr, Error **errp)
{
const void *prop;
int len;
prop = fdt_getprop(itb, img, name, &len);
if (!prop) {
error_setg(errp, "can't find %s address", name);
return -ENOENT;
}
switch (len) {
case 4:
*addr = fdt32_to_cpu(*(fdt32_t *)prop);
return 0;
case 8:
*addr = fdt64_to_cpu(*(fdt64_t *)prop);
return 0;
default:
error_setg(errp, "invalid %s address length %d", name, len);
return -EINVAL;
}
}
static int fit_load_kernel(const struct fit_loader *ldr, const void *itb,
int cfg, void *opaque, hwaddr *pend,
Error **errp)
{
const char *name;
const void *data;
const void *load_data;
hwaddr load_addr, entry_addr;
int img_off, err;
size_t sz;
int ret;
name = fdt_getprop(itb, cfg, "kernel", NULL);
if (!name) {
error_setg(errp, "no kernel specified by FIT configuration");
return -EINVAL;
}
load_data = data = fit_load_image_alloc(itb, name, &img_off, &sz, errp);
if (!data) {
error_prepend(errp, "unable to load kernel image from FIT: ");
return -EINVAL;
}
err = fit_image_addr(itb, img_off, "load", &load_addr, errp);
if (err) {
error_prepend(errp, "unable to read kernel load address from FIT: ");
ret = err;
goto out;
}
err = fit_image_addr(itb, img_off, "entry", &entry_addr, errp);
if (err) {
error_prepend(errp, "unable to read kernel entry address from FIT: ");
ret = err;
goto out;
}
if (ldr->kernel_filter) {
load_data = ldr->kernel_filter(opaque, data, &load_addr, &entry_addr);
}
if (pend) {
*pend = load_addr + sz;
}
load_addr = ldr->addr_to_phys(opaque, load_addr);
rom_add_blob_fixed(name, load_data, sz, load_addr);
ret = 0;
out:
g_free((void *) data);
if (data != load_data) {
g_free((void *) load_data);
}
return ret;
}
static int fit_load_fdt(const struct fit_loader *ldr, const void *itb,
int cfg, void *opaque, const void *match_data,
hwaddr kernel_end, Error **errp)
{
Error *err = NULL;
const char *name;
const void *data;
const void *load_data;
hwaddr load_addr;
int img_off;
size_t sz;
int ret;
name = fdt_getprop(itb, cfg, "fdt", NULL);
if (!name) {
return 0;
}
load_data = data = fit_load_image_alloc(itb, name, &img_off, &sz, errp);
if (!data) {
error_prepend(errp, "unable to load FDT image from FIT: ");
return -EINVAL;
}
ret = fit_image_addr(itb, img_off, "load", &load_addr, &err);
if (ret == -ENOENT) {
load_addr = ROUND_UP(kernel_end, 64 * KiB) + (10 * MiB);
error_free(err);
} else if (ret) {
error_propagate_prepend(errp, err,
"unable to read FDT load address from FIT: ");
goto out;
}
if (ldr->fdt_filter) {
load_data = ldr->fdt_filter(opaque, data, match_data, &load_addr);
}
load_addr = ldr->addr_to_phys(opaque, load_addr);
sz = fdt_totalsize(load_data);
rom_add_blob_fixed(name, load_data, sz, load_addr);
ret = 0;
out:
g_free((void *) data);
if (data != load_data) {
g_free((void *) load_data);
}
return ret;
}
static bool fit_cfg_compatible(const void *itb, int cfg, const char *compat)
{
const void *fdt;
const char *fdt_name;
bool ret;
fdt_name = fdt_getprop(itb, cfg, "fdt", NULL);
if (!fdt_name) {
return false;
}
fdt = fit_load_image_alloc(itb, fdt_name, NULL, NULL, NULL);
if (!fdt) {
return false;
}
if (fdt_check_header(fdt)) {
ret = false;
goto out;
}
if (fdt_node_check_compatible(fdt, 0, compat)) {
ret = false;
goto out;
}
ret = true;
out:
g_free((void *) fdt);
return ret;
}
int load_fit(const struct fit_loader *ldr, const char *filename, void *opaque)
{
Error *err = NULL;
const struct fit_loader_match *match;
const void *itb, *match_data = NULL;
const char *def_cfg_name;
char path[FIT_LOADER_MAX_PATH];
int itb_size, configs, cfg_off, off;
hwaddr kernel_end;
int ret;
itb = load_device_tree(filename, &itb_size);
if (!itb) {
return -EINVAL;
}
configs = fdt_path_offset(itb, "/configurations");
if (configs < 0) {
error_report("can't find node /configurations");
ret = configs;
goto out;
}
cfg_off = -FDT_ERR_NOTFOUND;
if (ldr->matches) {
for (match = ldr->matches; match->compatible; match++) {
off = fdt_first_subnode(itb, configs);
while (off >= 0) {
if (fit_cfg_compatible(itb, off, match->compatible)) {
cfg_off = off;
match_data = match->data;
break;
}
off = fdt_next_subnode(itb, off);
}
if (cfg_off >= 0) {
break;
}
}
}
if (cfg_off < 0) {
def_cfg_name = fdt_getprop(itb, configs, "default", NULL);
if (def_cfg_name) {
snprintf(path, sizeof(path), "/configurations/%s", def_cfg_name);
cfg_off = fdt_path_offset(itb, path);
}
}
if (cfg_off < 0) {
error_report("can't find configuration");
ret = cfg_off;
goto out;
}
ret = fit_load_kernel(ldr, itb, cfg_off, opaque, &kernel_end, &err);
if (ret) {
error_report_err(err);
goto out;
}
ret = fit_load_fdt(ldr, itb, cfg_off, opaque, match_data, kernel_end,
&err);
if (ret) {
error_report_err(err);
goto out;
}
ret = 0;
out:
g_free((void *) itb);
return ret;
}
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