>>Yes, set JAILHOUSE_CELL_AARCH32 in the cell configs' flags field.
I added this flag to rpi4.c
.header = {
.signature = JAILHOUSE_SYSTEM_SIGNATURE,
.revision = JAILHOUSE_CONFIG_REVISION,
.flags = JAILHOUSE_SYS_VIRTUAL_DEBUG_CONSOLE | JAILHOUSE_CELL_AARCH32,
I am just wondering, if it possible to do a bare metal context switching in
assembly?
On Thursday, 26 August 2021 at 22:10:22 UTC+2 [email protected] wrote:
> On 26.08.21 21:38, Ralf Ramsauer wrote:
> > Moustafa,
> >
> > On 26/08/2021 12:14, Moustafa Nofal wrote:
> >> Hello,
> >> I am trying to use FreeRTOS on Raspberry Pi 4 5.3 kernel and jailhouse
> >> forked from:
> >> https://github.com/siemens/jailhouse.git
> >>
> >> Fork Link:
> >> https://github.com/mustafa13e09940/jailhouse.git
> >>
> >> I edited string.h and added FreeRTOS source code to inmates/lib/include
> >> The problem that I have now is compiling, I got these errors
> >>
> >> I tried previously to make my own scheduler on assembly, but I though
> >> FreeRTOS would be more feasible.
> >>
> >> I am not sure what modification, that I require to enable Free RTOS on a
> >> jailhouse cell.
> >>
> >> CC
> >> /home/pi/repo_jailhouse/jailhouse/inmates/demos/arm64/../arm/gic-demo.o
> >> /tmp/ccm8j1fg.s: Assembler messages:
> >> /tmp/ccm8j1fg.s:987: Error: unknown mnemonic `swi' -- `swi 0'
> >> /tmp/ccm8j1fg.s:1112: Error: unknown mnemonic `swi' -- `swi 0'
> >> /tmp/ccm8j1fg.s:1315: Error: unknown mnemonic `swi' -- `swi 0'
> >> /tmp/ccm8j1fg.s:1486: Error: unknown mnemonic `swi' -- `swi 0'
> >> /tmp/ccm8j1fg.s:1663: Error: unknown mnemonic `stmdb' -- `stmdb
> SP!,{R0}'
> >> /tmp/ccm8j1fg.s:1664: Error: operand 1 must be an integer register --
> >> `mrs R0,CPSR'
> >> /tmp/ccm8j1fg.s:1665: Error: operand 1 must be a SIMD vector register --
> >> `orr R0,R0,#0xC0'
> >> /tmp/ccm8j1fg.s:1666: Error: unknown or missing system register name at
> >> operand 1 -- `msr CPSR,R0'
> >> /tmp/ccm8j1fg.s:1667: Error: unknown mnemonic `ldmia' -- `ldmia
> SP!,{R0}'
> >> /tmp/ccm8j1fg.s:2161: Error: unknown mnemonic `swi' -- `swi 0'
> >> /tmp/ccm8j1fg.s:2241: Error: unknown mnemonic `swi' -- `swi 0'
> >> /tmp/ccm8j1fg.s:2308: Error: unknown mnemonic `swi' -- `swi 0'
> >> /tmp/ccm8j1fg.s:2352: Error: unknown mnemonic `swi' -- `swi 0'
> >> /tmp/ccm8j1fg.s:2693: Error: unknown mnemonic `swi' -- `swi 0'
> >> make[4]: *** [scripts/Makefile.build:281:
> >> /home/pi/repo_jailhouse/jailhouse/inmates/demos/arm64/../arm/gic-demo.o]
> >> Error 1
> >> make[3]: *** [scripts/Makefile.build:497:
> >> /home/pi/repo_jailhouse/jailhouse/inmates/demos/arm64] Error 2
> >> make[2]: *** [scripts/Makefile.build:497:
> >> /home/pi/repo_jailhouse/jailhouse/inmates] Error 2
> >> make[1]: *** [Makefile:1629: _module_/home/pi/repo_jailhouse/jailhouse]
> >> Error 2
> >> make: *** [Makefile:40: modules] Error 2
> >
> > This is where you took the source from, right?
> > https://github.com/jameswalmsley/RaspberryPi-FreeRTOS
> >
> > This is a 32-bit port of FreeRTOS, but Jailhouse uses the 64-bit ARMv8
> > on the RPi4.
> >
> > I don't know if it's possible to switch back to 32-bit mode is possible,
> > I guess Jan knows.
> >
>
> Yes, set JAILHOUSE_CELL_AARCH32 in the cell configs' flags field.
>
> Jan
>
> --
> Siemens AG, T RDA IOT
> Corporate Competence Center Embedded Linux
>
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