[LinuxBIOS] filo ide speedup patch?

[Stefan Reinauer]

* Peter Stuge <stuge-linuxbios at cdy.org> [070315 21:27]:
> > please! whenever you find the time.
> > 
> > Lots of people still use FILO. (Even though I try to talk it down
> > while trying to find someone to look into the Grub2 port)
> 
> Find attached a patch for timer2 and hard reset. I'm looking at FILO
> right now.

The below patch works fine on my system, but some older versions of the
C3 lack support for the rdtsc command. (Nehemiah has it)

Whereas the Centaur/Wincore is said to not have rdtsc.

I would assume the patch is wrong for the epia and right for the epia-m.

Do you mind dropping the epia part?

> Changes by Richard Smith and me from the LinuxBIOS symposium 2006.
> 
> Without CONFIG_TSC_X86RDTSC_CALIBRATE_WITH_TIMER2 1 million outb():s are used for timer calibration and that takes over one second.
> EPIA boards have the x86 timer2 so let's use it and make boot faster.
> 
> src/mainboard/via/epia*/reset.c is dead code so HARD_RESET should be 0. (entire file within #if 0)
> 
> Signed-off-by: Peter Stuge <peter at stuge.se>
> 
> Index: src/mainboard/via/epia-m/Options.lb
> ===================================================================
> --- src/mainboard/via/epia-m/Options.lb	(revision 2570)
> +++ src/mainboard/via/epia-m/Options.lb	(working copy)
> @@ -38,6 +38,7 @@
>  uses MAXIMUM_CONSOLE_LOGLEVEL
>  uses CONFIG_CONSOLE_SERIAL8250
>  uses CONFIG_UDELAY_TSC
> +uses CONFIG_TSC_X86RDTSC_CALIBRATE_WITH_TIMER2
>  uses CONFIG_PCI_ROM_RUN
>  uses CONFIG_CONSOLE_VGA
>  uses CONFIG_MAX_PCI_BUSES 
> @@ -66,11 +67,12 @@
>  ## Use TSC for udelay.
>  ##
>  default CONFIG_UDELAY_TSC=1
> +default CONFIG_TSC_X86RDTSC_CALIBRATE_WITH_TIMER2=1
>  
>  ##
>  ## Build code to reset the motherboard from linuxBIOS
>  ##
> -default HAVE_HARD_RESET=1
> +default HAVE_HARD_RESET=0
>  
>  ##
>  ## Build code to export a programmable irq routing table
> Index: src/mainboard/via/epia/Options.lb
> ===================================================================
> --- src/mainboard/via/epia/Options.lb	(revision 2570)
> +++ src/mainboard/via/epia/Options.lb	(working copy)
> @@ -10,7 +10,8 @@
>  uses USE_FALLBACK_IMAGE
>  uses HAVE_FALLBACK_BOOT
>  uses HAVE_HARD_RESET
> -uses CONFIG_UDELAY_IO
> +uses CONFIG_UDELAY_TSC
> +uses CONFIG_TSC_X86RDTSC_CALIBRATE_WITH_TIMER2
>  uses HAVE_OPTION_TABLE
>  uses USE_OPTION_TABLE
>  uses CONFIG_ROM_PAYLOAD
> @@ -81,12 +82,13 @@
>  ##
>  ## Build code to reset the motherboard from linuxBIOS
>  ##
> -default HAVE_HARD_RESET=1
> +default HAVE_HARD_RESET=0
>  
>  ##
> -## use io based udelay function
> +## use TSC based udelay function
>  ##
> -default CONFIG_UDELAY_IO=1
> +default CONFIG_UDELAY_TSC=1
> +default CONFIG_TSC_X86RDTSC_CALIBRATE_WITH_TIMER2=1
>  
>  ##
>  ## Build code to export a programmable irq routing table

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