Hi Bob,
it seems you're using some outdated version of Genode. For instance, the callback function 'complete_packet' doesn't exist anymore. When using the benchmark test, like you did, there is no block service instantiated at all. The benchmark test is collocated with the driver directly. Therefore, there is no session instantiated, and registered at the driver. So, if the session pointer is used without an additional check, it would explain the pagefault you're experiencing. Maybe this is the case in your version? In the current block driver framework of Genode, direct accesses to the session pointer (for asynchronous working drivers) are eliminated. I've just tested the sd_card_bench run script on the Pandaboard with current Genode version, where it works. I'm sorry for the inconvenience, the whole block layer got a few face-lifts within the past three months.
Regards Stefan
On 03/12/2014 02:58 PM, Bob Stewart wrote:
I'm trying to get SD card support running on a Beaglebone (OMAP3). The sdcard driver from the Pandaboard (OMAP4) implementation should work, as the same MMC hardware is used on both boards. With only changes to the hardware address and the irq to reference one of the mmc instances on the Beaglebone, I successfully detect an SD card and read one block from it. This was done using the content of the /sd_card_bench/ run script. After the successful block read (non-dma), a call is made in the driver to "/complete_packet/" in the session pointed to from the Block driver. This call fails at the call tx_sink()->ready_to_ack() into the session_rpc_object with:
/no RM attachment (faulter 802d208c with IP 81009fc4 attempts to read from address 200)// //unknown signal context/.
Does this indicate that the rpc object was not set up correctly? Since I'm using the code in the OMAP4 /bench///directory untouched to run this, I would not have expected an issue with the block driver set up.
Any advice would be appreciated, as I dig further in the Genode rpc's.
Thanks,
Bob Stewart
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