Hi Clement,
i tested you patches on my MIPS board. I get following ooops:
===============================================================================
barebox@DPTechnics DPT-Module:/ iomem
0x00000000 - 0xffffffff (size 0x00000000) iomem
0x18020000 - 0x18020013 (size 0x00000014) 18020000.uart@xxxxxxxxxxx
0x18040000 - 0x18040033 (size 0x00000034) 18040000.gpio@xxxxxxxxxxx
0x18050000 - 0x180500ff (size 0x00000100) 18050000.pll-controller@xxxxxxxxxxx
0x18060008 - 0x1806000f (size 0x00000008) 18060008.wdt@xxxxxxxxxxx
0x18070000 - 0x180700ff (size 0x00000100) 19000000.ethernet@xxxxxxxxxxx
0x19000000 - 0x190001ff (size 0x00000200) 19000000.ethernet@xxxxxxxxxxx
0x1f000000 - 0x1f00000f (size 0x00000010) 1f000000.spi@xxxxxxxxxxx
0x80000000 - 0x83ffffff (size 0x04000000) kseg0_ram0
0x80000000 - 0x80007fff (size 0x00008000) vector
0x83788000 - 0x8378ffff (size 0x00008000) stack
0x83790000 - 0x83f8ffff (size 0x00800000) malloc space
0x83f90000 - 0x83fe66df (size 0x000566e0) barebox
0x83fe66e0 - 0x83feb0bf (size 0x000049e0) barebox data
0x83ff30c0 - 0x83ff5fe7 (size 0x00002f28) bss
barebox@DPTechnics DPT-Module:/ boot net
Booting entry 'net'
eth0: DHCP client bound to address 192.168.26.229
Entry Point: 00000000
Loading ELF '/mnt/tftp/ore-linux-dpt-module'
Loading devicetree from '/mnt/tftp/ore-oftree-dpt-module'
Starting application at 0x80000000, dts 0x837c325c...
Ooops, TLB miss on load or ifetch!
$ 0 : 00000000 00000020 00000000 80010000
$ 4 : fffffffe 83a80000 00010000 00008000
$ 8 : 83790008 8379b440 8379b440 8379b5ec
$12 : 83790000 00010000 00000060 00000011
$16 : 837c3728 ffffffea 83a80000 80000000
$20 : 00000000 00000000 00000000 00000000
$24 : 00000000 00000000
$28 : 83e6c000 8378fc30 83fdfa20 83fd55cc
Hi : 00063c6c
Lo : 60000000
epc : 00000000
ra : 83fd55cc
Status: 10000002
Cause : 40008008
Config: 80208483
### ERROR ### Please RESET the board ###
===============================================================================
The same test without patches looks like this:
rebox@DPTechnics DPT-Module:/ boot net
Booting entry 'net'
eth0: DHCP client bound to address 192.168.26.229
Loading ELF '/mnt/tftp/ore-linux-dpt-module'
Loading devicetree from '/mnt/tftp/ore-oftree-dpt-module'
Starting application at 0x80980000, dts 0x837c2e54...
[ 0.000000] Linux version 5.7.0-rc1-rt7-00316-g9b716caac68c9 (ptxdist@ptxdist) (gcc version 9.2.1 20191130 (OSELAS.Toolchain-2019.09.1 9-20191130), GNU ld (GNU Binutils) 2.32) #1 PREEMPT 2020-04-23T06:16:46+00:00
[ 0.000000] printk: bootconsole [early0] enabled
[
The main difference is:
Starting application at 0x80980000, dts 0x837c2e54... <<- works
Starting application at 0x80000000, dts 0x837c325c... <<- oops
Even with applied patch to protect exception vectore code, we still
overwriting it:
0x80000000 - 0x80007fff (size 0x00008000) vector
Any ideas?
On Tue, Apr 28, 2020 at 09:50:53AM +0200, Clement Leger wrote:
> Currently, when booting an elf file using "bootm /dev/mtdx", bootm will
> simply pass the file to the bootm and the read done on it will read the
> entire flash partition. This series starts by some cleanup and then add an
> elf_open function to load the elf file size only based on the elf header.
> A special handling for the elf file is also added in bootm data to allow
> using directly the elf file structure. Finally the mips bootm is modified
> to use bootm_load_os directly instead of manual elf loading.
>
> Changes v2 -> v3
> - Integrate elf loading in bootm_load_os
> - Add patch to remove now unused elf_load_image/elf_release_image
> - Use malloc instead of xmalloc and check return value
>
> Changes v1 -> v2
> - Add BOOTM_ELF config to select elf support and add checks in code
> - Add an elf_get_mem_size function to avoid computing elf size in bootm.c
> - Use xmalloc and read_full in elf_open instead of xzalloc/read
> - Fix data->elf NULL reset
> - Remove elf struct entirely from mips bootm code
>
> Clement Leger (7):
> common: elf: add computation of elf boundaries
> common: elf: fix warning on 32 bits architectures
> common: elf: split init to be reused from other function
> common: elf: add elf_open, elf_close and elf_load
> common: bootm: add support for elf file loading
> mips: lib: bootm: use bootm elf loading capabilities
> common: elf: remove elf_load_image/elf_release_image
>
> arch/mips/lib/bootm.c | 31 +++++-------
> common/Kconfig | 8 ++++
> common/bootm.c | 33 +++++++++++++
> common/elf.c | 107 ++++++++++++++++++++++++++++++++++++------
> include/bootm.h | 3 ++
> include/elf.h | 16 ++++++-
> 6 files changed, 161 insertions(+), 37 deletions(-)
>
> --
> 2.17.1
>
>
> _______________________________________________
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> http://lists.infradead.org/mailman/listinfo/barebox
>
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