On Mon, Feb 21, 2005 at 02:06:18PM +0100, Charles-Edouard Ruault wrote:
> Alan Cox wrote:
> >On Llu, 2005-02-07 at 09:29, Charles-Edouard Ruault wrote:
> >>- Why is the generic timer using this address ? isn't it reserving a too
> >>wide portion of IO ports ? Should it be modified for this board ?
> >
> >It just reserved the entire chip space since way back when.
> >>- If there's a good reason for the timer to request this address, is
> >>there a clean way to share it with the timer ?
> >
> >Submit a small patch to Linus/Andrew to make the generic code only
> >reserve the ports it should. It's just a historical oversight
> >
> >
> >
> Linus, Andrew,
> As suggested by Alan, here's a small patch against kernel 2.4.29 to
> split the IO addresses reserved for the PC timer into two regions
> instead of a large one.
> It mimics what has been done in kernel 2.6.
> Instead of reserving 0x40 through 0x5f it reserves only what the two
> timers need, i.e 0x40-0x43 and 0x50-0x53.
> It patches both i386 and x86_64 architecture.
Applied,
Thanks Charles.
> --- linux/arch/i386/kernel/setup.c.orig Fri Feb 18 18:46:55 2005
> +++ linux/arch/i386/kernel/setup.c Mon Feb 21 11:19:45 2005
> @@ -354,7 +354,8 @@
> struct resource standard_io_resources[] = {
> { "dma1", 0x00, 0x1f, IORESOURCE_BUSY },
> { "pic1", 0x20, 0x3f, IORESOURCE_BUSY },
> - { "timer", 0x40, 0x5f, IORESOURCE_BUSY },
> + { "timer0", 0x40, 0x43, IORESOURCE_BUSY },
> + { "timer1", 0x50, 0x53, IORESOURCE_BUSY },
> { "keyboard", 0x60, 0x6f, IORESOURCE_BUSY },
> { "dma page reg", 0x80, 0x8f, IORESOURCE_BUSY },
> { "pic2", 0xa0, 0xbf, IORESOURCE_BUSY },
> --- linux/arch/x86_64/kernel/setup.c.orig Mon Feb 21 11:56:11 2005
> +++ linux/arch/x86_64/kernel/setup.c Mon Feb 21 11:54:41 2005
> @@ -93,7 +93,8 @@
> struct resource standard_io_resources[] = {
> { "dma1", 0x00, 0x1f, IORESOURCE_BUSY },
> { "pic1", 0x20, 0x3f, IORESOURCE_BUSY },
> - { "timer", 0x40, 0x5f, IORESOURCE_BUSY },
> + { "timer0", 0x40, 0x43, IORESOURCE_BUSY },
> + { "timer1", 0x50, 0x53, IORESOURCE_BUSY },
> { "keyboard", 0x60, 0x6f, IORESOURCE_BUSY },
> { "dma page reg", 0x80, 0x8f, IORESOURCE_BUSY },
> { "pic2", 0xa0, 0xbf, IORESOURCE_BUSY },
-
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