Hi,
I didn't manage to get an image to boot on i.MX35 (internal boot on
NAND) with current imx-image and 2014.09.0.
>From the i.MX35 user manual :
Since MLC NAND Flash devices do not guarantee error-free boot blocks,
the i.MX35 boot code requires that the first 4 Kbytes of boot code be
duplicated in a subsequent block to serve as a second copy option.
Actually imx-image puts the image at 4k but it seems that the i.MX35
bootrom copies only from 8k as it expects that there is a copy of the
first 0-4k in 4k-8k (and is supposed to use this copy if there is an
ECC error in the first 4k) as we can see in the following lines :
barebox@Eukrea CPUIMX35:/ md -s /dev/nand0 0x0
00000000: ea0003fe eafffffe eafffffe eafffffe ................
00000010: eafffffe eafffffe eafffffe eafffffe ................
00000020: 65726162 00786f62 00000000 00000000
barebox.........
=-> header is @ 0 in flash
barebox@Eukrea CPUIMX35:/ md -s /dev/nand0 0x1000
00001000: 56341200 00000000 0001eda1 00000000 ..4V............
00001010: 00000000 00000000 00000000
00000000 ................
=-> so we have data @ 0x1000 in flash
barebox@Eukrea CPUIMX35:/ md 0x87f00000
87f00000: 00000000 00000000 00000000 00000000 ................
87f00010: 00000000 00000000 00000000
00000000 ................
=-> but we don't find this data in RAM
barebox@Eukrea CPUIMX35:/ md -s /dev/nand0 0x2000
00002000: ea000012 eafffffe eafffffe eafffffe ................
00002010: eafffffe eafffffe eafffffe eafffffe ................
00002020: 65726162 00786f62 00000000 00034272
barebox.....rB..
=-> so we have the image @ 0x2000 in flash
barebox@Eukrea CPUIMX35:/ md 0x87f01000
87f01000: ea000871 eafffffe eafffffe eafffffe q...............
87f01010: eafffffe eafffffe eafffffe eafffffe ................
87f01020: 65726162 00786f62 87f02000 0003b520 barebox.. .. ...
=-> and we find it in RAM
This patch fix the problem, how should this be hanled in imx-image ?
diff --git a/scripts/imx/imx-image.c b/scripts/imx/imx-image.c
index 3a25c09..f908069 100644
--- a/scripts/imx/imx-image.c
+++ b/scripts/imx/imx-image.c
@@ -761,7 +761,7 @@ int main(int argc, char *argv[])
exit(1);
}
- ret = xwrite(outfd, buf, 4096);
+ ret = xwrite(outfd, buf, 8192);
if (ret < 0) {
perror("write");
exit(1);
@@ -774,7 +774,7 @@ int main(int argc, char *argv[])
}
while (image_size) {
- int now = image_size < 4096 ? image_size : 4096;
+ int now = image_size < 8192 ? image_size : 8192;
ret = xread(infd, buf, now);
if (ret) {
Eric
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