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U-Boot: check for /chosen in the FDT for an initrd holding our tgz

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* since the FDT linux boot method doesn't pass the uimage, we can't
use it to pass the kernel+driver tgz in a multi-file uimage.
* instead we check for the linux initrd properties in the /chosen node.

(cherry picked from my sam460ex branch)
This commit is contained in:
François Revol 2012-08-25 00:33:24 +02:00
parent 97bcc417ce
commit 338324dc66
1 changed files with 30 additions and 1 deletions
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31
src/system/boot/platform/u-boot/start.cpp
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@ -21,6 +21,12 @@
#include <string.h>
extern "C" {
#include <fdt.h>
#include <libfdt.h>
#include <libfdt_env.h>
};
#define HEAP_SIZE (128 * 1024)
@ -171,12 +177,35 @@ start_raw(int argc, const char **argv)
console_init();
cpu_init();
// if we get passed an FDT, check /chosen for initrd
if (gFDT != NULL) {
int node = fdt_path_offset(gFDT, "/chosen");
const void *prop;
int len;
phys_addr_t initrd_start = 0, initrd_end = 0;
if (node >= 0) {
prop = fdt_getprop(gFDT, node, "linux,initrd-start", &len);
if (prop && len == 4)
initrd_start = fdt32_to_cpu(*(uint32_t *)prop);
prop = fdt_getprop(gFDT, node, "linux,initrd-end", &len);
if (prop && len == 4)
initrd_end = fdt32_to_cpu(*(uint32_t *)prop);
if (initrd_end > initrd_start) {
args.platform.boot_tgz_data = (void *)initrd_start;
args.platform.boot_tgz_size = initrd_end - initrd_start;
dprintf("Found boot tgz from FDT @ %p, %" B_PRIu32 " bytes\n",
args.platform.boot_tgz_data, args.platform.boot_tgz_size);
}
}
}
// if we get passed a uimage, try to find the second blob
if (gUImage != NULL
&& image_multi_getimg(gUImage, 1,
(uint32*)&args.platform.boot_tgz_data,
&args.platform.boot_tgz_size)) {
dprintf("Found boot tgz @ %p, %" B_PRIu32 " bytes\n",
dprintf("Found boot tgz from uimage @ %p, %" B_PRIu32 " bytes\n",
args.platform.boot_tgz_data, args.platform.boot_tgz_size);
}