I am trying to boot seL4 on beaglebone white. I have an initial code just to configure the DDR2 memory at range 0x80000000-0xbfffffff. As we can see below, the start address is the virtual address 0xf0000000 but at this point I have no MMU configured. I was thinking that the segment .boot should be the code to prepare all details about MMU/D-CACHE/I-CACHE but it's not what gdb is understanding based in the elf header. Someone could explain to me how is the kernel boot; what do I have to consider. I guess that beaglebone is not supported but this is exactly my goal, to make seL4 boot on beaglebone. Any help or suggestion is very welcome. Sincerely, Jorge Ventura (gdb) load kernel.elf
Loading section .boot, size 0x10000 lma 0x80000000 Loading section .text, size 0xf1ec lma 0x80010000 Loading section .text.unlikely, size 0xd98 lma 0x8001f1ec Loading section .rodata, size 0x4170 lma 0x8001ff84 Loading section .data, size 0x8 lma 0x800240f4 Start address 0xf0000000, load size 147708 Transfer rate: 319 KB/sec, 3787 bytes/write.
(gdb) monitor poll background polling: on TAP: am335x.dap (enabled) target state: halted target halted in ARM state due to debug-request, current mode: System cpsr: 0x6000019f pc: 0xf0000000 MMU: disabled, D-Cache: disabled, I-Cache: disabled
Ignore my last email. All addresses are not for the board I am using, my questions doesn't make sense. Sorry about that. On Mon, Aug 4, 2014 at 9:20 AM, Jorge Ventura < jorge.araujo.ventura@gmail.com> wrote:
I am trying to boot seL4 on beaglebone white. I have an initial code just to configure the DDR2 memory at range 0x80000000-0xbfffffff.
As we can see below, the start address is the virtual address 0xf0000000 but at this point I have no MMU configured. I was thinking that the segment .boot should be the code to prepare all details about MMU/D-CACHE/I-CACHE but it's not what gdb is understanding based in the elf header.
Someone could explain to me how is the kernel boot; what do I have to consider. I guess that beaglebone is not supported but this is exactly my goal, to make seL4 boot on beaglebone.
Any help or suggestion is very welcome.
Sincerely, Jorge Ventura
(gdb) load kernel.elf
Loading section .boot, size 0x10000 lma 0x80000000 Loading section .text, size 0xf1ec lma 0x80010000 Loading section .text.unlikely, size 0xd98 lma 0x8001f1ec Loading section .rodata, size 0x4170 lma 0x8001ff84 Loading section .data, size 0x8 lma 0x800240f4 Start address 0xf0000000, load size 147708 Transfer rate: 319 KB/sec, 3787 bytes/write.
(gdb) monitor poll background polling: on TAP: am335x.dap (enabled) target state: halted target halted in ARM state due to debug-request, current mode: System cpsr: 0x6000019f pc: 0xf0000000 MMU: disabled, D-Cache: disabled, I-Cache: disabled
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Jorge Ventura