FORUMS

XDA Recap: This Week In Android (Apr 26 – May 2)

Here in the digital XDA newsroom, we spend our days pouring over an average of … more

Sunday Debate: Great Camera Hardware, or Software?

Join us in a fun Sunday Debate on phone cameras. Come with your opinions and feel … more

XDA Picks: Best Apps of the Week (Apr 25 – May 1)

Apps are at the front and center of any smartphone experience, and with over a … more

Lollipop Xposed Framework Alpha 4 Released

Good news to all Xposed Framework fans. XDA Senior Recognized … more
Post Reply Subscribe to Thread Email Thread

Bootloader - How does it know what partition to boot

10th February 2013, 05:46 PM |#1  
OP Senior Recognized Developer
Thanks Meter: 4,767
 
Donate to Me
More
Hello.

I am looking at fixing powerdown from TWRP on the Galaxy Note2 series of phones. I was able to get it to power down calling android_reboot(ANDROID_RB_POWEROFF, 0, 0); from libcutils. However when the phone powers on, it goes straight into recovery.

I was hoping someone might have an idea on where the bootloader gets it's information on what partition to boot so we can fix this to boot into system right away.

On the qualcomm Note1, we could run
Code:
echo 3 > /dev/block/mmcblk0p12
to boot into system.

I am looking forward to your ideas.
 
 
13th February 2013, 01:20 AM |#2  
Senior Recognized Developer
Flag Gdańsk
Thanks Meter: 3,449
 
Donate to Me
More
Maybe this can help you?
https://github.com/CyanogenMod/andro...s/sec-reboot.c
The Following User Says Thank You to Rebellos For This Useful Post: [ View ]
13th February 2013, 02:43 AM |#3  
OP Senior Recognized Developer
Thanks Meter: 4,767
 
Donate to Me
More
Quote:
Originally Posted by Rebellos

Maybe this can help you?
https://github.com/CyanogenMod/andro...s/sec-reboot.c

Hi, thanks for the pointer. Do you know how to pass the info to that sec reboot function to boot normally?
13th February 2013, 06:00 AM |#4  
thewadegeek's Avatar
Senior Member
Flag Cedar Rapids
Thanks Meter: 819
 
More
Re: Bootloader - How does it know what partition to boot
Based off a quick glance at the code from my phone you want to hit the reboot_mode_none case.

Sent from my SCH-R950 using Tapatalk 2
13th February 2013, 10:34 AM |#5  
OP Senior Recognized Developer
Thanks Meter: 4,767
 
Donate to Me
More
Quote:
Originally Posted by thewadegeek

Based off a quick glance at the code from my phone you want to hit the reboot_mode_none case.

Sent from my SCH-R950 using Tapatalk 2

Yeah I was wondering how to pass that to some place from userland since you can't talk to the kernel without some facility interface.
13th February 2013, 03:42 PM |#6  
thewadegeek's Avatar
Senior Member
Flag Cedar Rapids
Thanks Meter: 819
 
More
Quote:
Originally Posted by bigbiff

Yeah I was wondering how to pass that to some place from userland since you can't talk to the kernel without some facility interface.

Ah ok my bad, misunderstood the question. Beyond my are of expertise though.
13th February 2013, 04:14 PM |#7  
OP Senior Recognized Developer
Thanks Meter: 4,767
 
Donate to Me
More
Quote:
Originally Posted by thewadegeek

Ah ok my bad, misunderstood the question. Beyond my are of expertise though.

I don't have my phone now to list running modules, but I am wondering if there is a module that might handle this. I will investigate tonight.
14th February 2013, 04:03 AM |#8  
thewadegeek's Avatar
Senior Member
Flag Cedar Rapids
Thanks Meter: 819
 
More
Quote:
Originally Posted by bigbiff

I don't have my phone now to list running modules, but I am wondering if there is a module that might handle this. I will investigate tonight.

btlock.ko
cifs.ko
commkm.ko
dhd.ko
dns_resolver.ko
md4.ko
mvpkm.ko
pvtcpkm.ko
scsi_wait_scan.ko
vpnclient.ko

CyanogenMod 10.1.
Post Reply Subscribe to Thread
Previous Thread Next Thread
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes