Re: [PATCH] Changes to support booting NetBSD/alpha

[Richard Henderson <richard.henderson@linaro.org>]

On 10/6/20 8:24 PM, Jason Thorpe wrote:
> Along with the previous patch set for qemu-palcode, these changes
> allow NetBSD/alpha to run in qemu-system-alpha.
> 
> - Allow a the minimum PCI device number to be passed to typhoon_init().
>   Use this to specify a minimum PCI device number of 1 in the Clipper
>   system emulation, since that's the lowest PCI device number with
>   valid interrupt mappings on that system.
> - Instead of passing just the CPU count in trap_arg2, also pass other
>   configuration information.  Define the first config bit (bit 6) to
>   reflect the "-nographic" option; PALcode will use this to initialize
>   the Console Terminal Block to specify serial console.
> - Attach a minimal i82378 SIO PCI node; some operating systems won't
>   scan for ISA devices unless a PCI-ISA bridge is detected.  Real hardware
>   would have had a Cypress or ALI bridge, but many Alpha models shipped
>   with a i82378, and most operating sytems are not picky about the specific
>   model.
> - Modify the mc146818rtc emulation to ensure the timer is started as soon
>   as the device is realized, and update the PF bit in REG_C even if it is
>   not going to result in raising an interrupt, as the real hardware does.
> 

This will have to be split up -- again, essentially by bullet point -- but it
looks reasonable enough.

You need to mind CODING_STYLE.  Run your patches through
./scripts/checkpatch.pl for a rough guide.


r~