Re: [seL4] arm_data_abort_exception

Hi Wladi, seL4test is the foundation of our regression tests. If you have made it this far in the boot process, the issue is likely to reside in your platform dependent user space timer or UART driver. 0x805 corresponds with a level 1 translation fault. This means that there is no virtual

Re: [seL4] arm_data_abort_exception

Hi Wladi, The addresses must be aligned to the size of the frame to be mapped. For a small page, it must be aligned to 0x1000. This is a requirement of the ARM hardware rather than the seL4 kernel. The simple workaround is to add an additional offset to the mapped address. You can see how the

Re: [seL4] arm_data_abort_exception

Hello, I wonder how to map a device to the kernel where the first 3 bytes are not 0. Like the UART device which is phyically connected to 0x02530c00. The abort handler in pte_pte_small_new() get called when the first 3 bytes are not 0 (on this SoC are the first 3 bytes for the UART c00). Any

Re: [seL4] arm_data_abort_exception

Hi Wladislav, If the fault occurs before the activation of the kernel PD, this likely means that you are trying to printf before the UART is mapped. If you are using printf for debugging before the PD is activated, you will need to change your kernel UART driver to use the physical address of

Re: [seL4] arm_data_abort_exception

A "Synchronous Data abort" occurs when a virtual memory translation fails on load/store operations. A "Prefetch abort" occurs when a virtual memory translation fails when loading instructions into the CPU pipeline. An "Asynchronous Data abort" occurs when a physical memory translation fails (ie,

Re: [seL4] arm_data_abort_exception

could it be an TLB fault? For my understandig, based on http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.ddi0438g/BABFFDFD.html it is the DFSR = 0x7 -> b00111 Translation fault, 2nd level. Thanks! - Wladislav Wiebe 2017-01-24 15:42 GMT+01:00 Wladislav Wiebe :

[seL4] arm_data_abort_exception

Hello, has somebody experience with running into arm_data_abort_exception after enabling the MMU/paging and jumping to the kernel image: .. ELF-loader started on CPU: ARM Ltd. Cortex-A15 r2p4 paddr=[9000..904b041f] ELF-loading image 'kernel' paddr=[8000..80033fff]