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Re: [Qemu-devel] [RFC PATCH 18/21] target-arm: switch banked CP register
From: |
Peter Maydell |
Subject: |
Re: [Qemu-devel] [RFC PATCH 18/21] target-arm: switch banked CP registers |
Date: |
Fri, 20 Dec 2013 14:33:46 +0000 |
On 20 December 2013 14:12, Fedorov Sergey <address@hidden> wrote:
> I've briefly looked at the v8 ARM ARM. As I can see there is no banked
> system control registers in AArch64. Seems the concept is changed to provide
> separate registers for each meaningful execution level. Please, correct me
> if I am wrong.
Yes, I think this is generally correct.
> So I think there shouldn't be "active" and "banked" fields for banked
> AArch32 CP15 registers as in my patch. Seems it is worth to use AArch64 view
> of system control registers as a basis. That means there would be separate S
> and NS register fields in CPU state structure that will me mapped to
> separate AArch64 registers. ARMCPRegInfo structure would have additional
> field holding NS register state filed offset for AArch32 banked registers.
This sounds like it could work, though there are some wrinkles for
registers with readfns/writefns -- do we have extra s vs ns read/write
functions, or just one set of functions which has to look in env->ns to
figure out whether to use the S or NS version?
> Which branch in https://git.linaro.org/people/peter.maydell/qemu-arm.git
> repository holds the most actual A64 support?
It's still a work in progress so it depends what you want.
a64-third-fourth-set is the last set of patches that went out for
review, and should generally work for integer instructions.
a64-working is my work-in-progress branch so it will have the
most recent versions of everything, but it rebases frequently
and is liable to occasionally be broken...
thanks
-- PMM
- [Qemu-devel] [RFC PATCH 12/21] target-arm: add NSACR support, (continued)
- [Qemu-devel] [RFC PATCH 12/21] target-arm: add NSACR support, Sergey Fedorov, 2013/12/03
- [Qemu-devel] [RFC PATCH 18/21] target-arm: switch banked CP registers, Sergey Fedorov, 2013/12/03
- Re: [Qemu-devel] [RFC PATCH 18/21] target-arm: switch banked CP registers, Peter Crosthwaite, 2013/12/18
- Re: [Qemu-devel] [RFC PATCH 18/21] target-arm: switch banked CP registers, Fedorov Sergey, 2013/12/19
- Re: [Qemu-devel] [RFC PATCH 18/21] target-arm: switch banked CP registers, Peter Maydell, 2013/12/19
- Re: [Qemu-devel] [RFC PATCH 18/21] target-arm: switch banked CP registers, Peter Crosthwaite, 2013/12/19
- Re: [Qemu-devel] [RFC PATCH 18/21] target-arm: switch banked CP registers, Fedorov Sergey, 2013/12/19
- Re: [Qemu-devel] [RFC PATCH 18/21] target-arm: switch banked CP registers, Peter Crosthwaite, 2013/12/19
- Re: [Qemu-devel] [RFC PATCH 18/21] target-arm: switch banked CP registers, Peter Maydell, 2013/12/19
- Re: [Qemu-devel] [RFC PATCH 18/21] target-arm: switch banked CP registers, Fedorov Sergey, 2013/12/20
- Re: [Qemu-devel] [RFC PATCH 18/21] target-arm: switch banked CP registers,
Peter Maydell <=
- Re: [Qemu-devel] [RFC PATCH 18/21] target-arm: switch banked CP registers, Fedorov Sergey, 2013/12/20
- Re: [Qemu-devel] [RFC PATCH 18/21] target-arm: switch banked CP registers, Fedorov Sergey, 2013/12/20
- Re: [Qemu-devel] [RFC PATCH 18/21] target-arm: switch banked CP registers, Peter Crosthwaite, 2013/12/21
- Re: [Qemu-devel] [RFC PATCH 18/21] target-arm: switch banked CP registers, Peter Maydell, 2013/12/22
- Re: [Qemu-devel] [RFC PATCH 18/21] target-arm: switch banked CP registers, Fedorov Sergey, 2013/12/23
- Re: [Qemu-devel] [RFC PATCH 18/21] target-arm: switch banked CP registers, Fedorov Sergey, 2013/12/23
- Re: [Qemu-devel] [RFC PATCH 18/21] target-arm: switch banked CP registers, Peter Maydell, 2013/12/23
[Qemu-devel] [RFC PATCH 15/21] target-arm: add banked coprocessor register type, Sergey Fedorov, 2013/12/03
[Qemu-devel] [RFC PATCH 16/21] target-arm: convert appropriate coprocessor registers to banked type, Sergey Fedorov, 2013/12/03
[Qemu-devel] [RFC PATCH 13/21] target-arm: add SDER definition, Sergey Fedorov, 2013/12/03