Re: Kernelnewbies Digest, Vol 71, Issue 26
The BBC Micro which was 6502 based had an add on that let you connect a Z80 straight onto the same bus. Different regards "operating system" I know, but it has been tried before. On Fri, 21 Oct 2016, 17:00 , <kernelnewbies-request@kernelnewbies.org> wrote:
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Today's Topics:
1. Is that possible to implement a single machine with heterogeneous architecture. (Douglas Su) 2. Re: Is that possible to implement a single machine with heterogeneous architecture. (Felix Bytow) 3. Re: Is that possible to implement a single machine with heterogeneous architecture. (Valdis.Kletnieks@vt.edu)
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Message: 1 Date: Fri, 21 Oct 2016 03:10:28 +0000 From: Douglas Su <d0u9.su@outlook.com> Subject: Is that possible to implement a single machine with heterogeneous architecture. To: kernelnewbies <kernelnewbies@kernelnewbies.org> Message-ID: < SN1PR04MB2096827D49CA8F766DA1392EECD40@SN1PR04MB2096.namprd04.prod.outlook.com
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Hello everyone,
Is that possible to install multiple CPUs which have different architecture on a single machine? For example, on a single machine with two different cpu sockets for X86 and MIPS cpu respectively, and these two cpus are inter-connected with some sorts of bus (PCI or other advanced buses).
If it is possible, Is this machine still SMP? What will lscpu (or cat /proc/cpuinfo) dump?
Thx!
On Fri, 21 Oct 2016 17:04:50 -0000, Laurence Rochfort said:
The BBC Micro which was 6502 based had an add on that let you connect a Z80 straight onto the same bus.
If I remember correctly, that one was basically an either/or - you could boot the 6502, or the Z80, but you couldn't run both at the same time....
Ah yes, you're correct. The Z80 ran the program and the 6502 then handled I/O. https://en.wikipedia.org/wiki/Tube_%28BBC_Micro%29?wprov=sfla1 On Fri, 21 Oct 2016, 18:40 , <Valdis.Kletnieks@vt.edu> wrote:
On Fri, 21 Oct 2016 17:04:50 -0000, Laurence Rochfort said:
The BBC Micro which was 6502 based had an add on that let you connect a Z80 straight onto the same bus.
If I remember correctly, that one was basically an either/or - you could boot the 6502, or the Z80, but you couldn't run both at the same time....
Hello everybody I was looking into an issue with the omap-wdt.c. The watchdog driver not is reporting a different boot status when a reset is being triggered by the watchdog.
From what I gathered, the issue is that in the omap_wdt_probe function, pdev->dev->platform_data requires to be a reference to the PRM module, however it has not been set, and I was wondering how this should work in an environment that uses the device tree method. (Link to usage: http://lxr.free-electrons.com/source/drivers/watchdog/omap_wdt.c#L268 ).
My questions are as follows: 1) Is my assertion correct that the current method does not work when the driver is being initialised from an device tree instead of a old style board file. 2) If that is the case, what would be the best method of fixing this situation. Thank you very much in advance.
Seems a bug to me, you should post it to linux-omap :) Regards, 2016-10-27 6:14 GMT-02:00 Cor Peters <cpeters@victronenergy.com>:
Hello everybody
I was looking into an issue with the omap-wdt.c. The watchdog driver not is reporting a different boot status when a reset is being triggered by the watchdog.
From what I gathered, the issue is that in the omap_wdt_probe function, pdev->dev->platform_data requires to be a reference to the PRM module, however it has not been set, and I was wondering how this should work in an environment that uses the device tree method. (Link to usage: http://lxr.free-electrons.com/source/drivers/watchdog/omap_wdt.c#L268 ).
My questions are as follows: 1) Is my assertion correct that the current method does not work when the driver is being initialised from an device tree instead of a old style board file. 2) If that is the case, what would be the best method of fixing this situation.
Thank you very much in advance.
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participants (4)
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Cor Peters -
Daniel. -
Laurence Rochfort -
Valdis.Kletnieks＠vt.edu