Re: #customboard #defconfig #supervisormode #defconfig #customboard #supervisormode
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Sathya Narayanan N <sathya281@...>
Thanks. Actually I want to remove any supervisor mode access in the code. We don't want to have mmu. We want to run in user/machine mode.
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I got your point on usermode. Is there a way I can turn off mmu/ supervisor mode. And run in machine mode. The riscv32 hardware, we are running doesn't support mmu or supervisor mode. We want to run zephyr on it. I am looking for some flag kind of thing, that can turn off mmu/supervisor mode. Please suggest.
On Thursday, October 18, 2018, Boie, Andrew P <andrew.p.boie@...> wrote: > Hi, > > > > User mode is currently only supported on x86, ARM, and ARC CPUs. > > The documentation uses "supervisor mode" to refer to non-user mode, i.e. all CPU instructions may be executed and all memory may be touched. > > It seems to be the case that this collides with some RISC-V specific term? > > > > More information: https://docs.zephyrproject.org/latest/kernel/usermode/usermode.html > > > > HTH, > > Andrew > > > > From: users@... [mailto:users@...] On Behalf Of Mani Sadhasivam > Sent: Wednesday, October 17, 2018 3:00 AM > To: users@... > Subject: Re: [Zephyr-users] #customboard #defconfig #supervisormode > > > > Zephyr supports supervisor mode. I want to nullify it at software level. > > Where did you find this information? For RISC-V SoCs, the supervisor mode is only used > when the base architecture has the 'S' extension. Since there is no Supervisor enabled > SoCs supported by Zephyr so far, the core RISC-V code doesn't care about it. > > This applies to QEMU also. > > -Mani > -- regards,
Sathya
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