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Re: [Qemu-devel] [PATCH v9 00/10] 8bit AVR cores
From: |
Michael Rolnik |
Subject: |
Re: [Qemu-devel] [PATCH v9 00/10] 8bit AVR cores |
Date: |
Wed, 6 Jul 2016 12:58:35 +0300 |
actually registers in the range [0x0020 - 0x0060) have dual access through
ST/LD and OUT/IN
registers in the range [0x0000 - 0x0020) have dual access through ST/LD and
CPU
registers in the range [0x0060 - 0x0100) can be accessed by LD/ST only.
we can create memory device, however it will cover the whole range [0x0000
- 0x0100), or we can create io device.
On Wed, Jul 6, 2016 at 12:54 PM, Peter Maydell <address@hidden>
wrote:
> On 6 July 2016 at 10:49, Michael Rolnik <address@hidden> wrote:
> > in the range [0x0000 - 0x0100)
> > some registers are owned by the CPU and some by board devices.
> > CPU registers will be accessed by helper_fullrd & helper_fullwr whereas
> > device registers e.g. USB, will be handled by USB provided it's possible
> to
> > add rd/wr handlers for specific io addresses.
>
> Something like USB which is conceptually separate from the
> CPU itself can be implemented as its own device which is mapped
> in to the right place in the memory map. You probably want an
> "SoC" container device which maps all the various devices
> into the right place, and then every board which uses that
> particular chip doesn't need to duplicate that code.
> There are plenty of examples of this kind of thing: try
> the ARM imx boards or the xilinx ones.
>
> thanks
> -- PMM
>
--
Best Regards,
Michael Rolnik
- Re: [Qemu-devel] [PATCH v9 00/10] 8bit AVR cores, (continued)
- Re: [Qemu-devel] [PATCH v9 00/10] 8bit AVR cores, Peter Maydell, 2016/07/05
- Re: [Qemu-devel] [PATCH v9 00/10] 8bit AVR cores, Michael Rolnik, 2016/07/05
- Re: [Qemu-devel] [PATCH v9 00/10] 8bit AVR cores, Peter Maydell, 2016/07/05
- Re: [Qemu-devel] [PATCH v9 00/10] 8bit AVR cores, Richard Henderson, 2016/07/05
- Re: [Qemu-devel] [PATCH v9 00/10] 8bit AVR cores, Michael Rolnik, 2016/07/06
- Re: [Qemu-devel] [PATCH v9 00/10] 8bit AVR cores, Peter Maydell, 2016/07/06
- Re: [Qemu-devel] [PATCH v9 00/10] 8bit AVR cores, Michael Rolnik, 2016/07/06
- Re: [Qemu-devel] [PATCH v9 00/10] 8bit AVR cores, Peter Maydell, 2016/07/06
- Re: [Qemu-devel] [PATCH v9 00/10] 8bit AVR cores, Michael Rolnik, 2016/07/06
- Re: [Qemu-devel] [PATCH v9 00/10] 8bit AVR cores, Peter Maydell, 2016/07/06
- Re: [Qemu-devel] [PATCH v9 00/10] 8bit AVR cores,
Michael Rolnik <=
- Re: [Qemu-devel] [PATCH v9 00/10] 8bit AVR cores, Peter Maydell, 2016/07/06
- Re: [Qemu-devel] [PATCH v9 00/10] 8bit AVR cores, Michael Rolnik, 2016/07/06
- Re: [Qemu-devel] [PATCH v9 00/10] 8bit AVR cores, Peter Maydell, 2016/07/06
- Re: [Qemu-devel] [PATCH v9 00/10] 8bit AVR cores, Michael Rolnik, 2016/07/06
- Re: [Qemu-devel] [PATCH v9 00/10] 8bit AVR cores, Peter Maydell, 2016/07/06
- Re: [Qemu-devel] [PATCH v9 00/10] 8bit AVR cores, Michael Rolnik, 2016/07/06
- Re: [Qemu-devel] [PATCH v9 00/10] 8bit AVR cores, Michael Rolnik, 2016/07/06
- Re: [Qemu-devel] [PATCH v9 00/10] 8bit AVR cores, Peter Maydell, 2016/07/06
- Re: [Qemu-devel] [PATCH v9 00/10] 8bit AVR cores, Richard Henderson, 2016/07/06