Any gain to supporting only a single PCMCIA slot?
Hello.
PCMCIA/Cardbus controllers typically (always?) support 2 slots, and system resources are allocated to support those slots. When you build PCMCIA support into your kernel, you are implicitly asking for both slots to be supported. I'm wondering if it would be worthwhile to let the user opt out of supporting one of the slots.
Compaq, in their finite wisdom, only provides a single Type2 Cardbus slot on my Presario 1260 notebook. The controller (a TI PCI1131, see below) can handle 2 slots, of course, but only a single physical connector is present on this machine. Therefore I will never get the use of half of the controller, including the I/O address, etc. that the kernel has allocated for it.
Would it be worth the savings in system resources to allow support for only a single slot?
Thank you.
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# cat /proc/iomem 00000000-0009f7ff : System RAM 0009f800-0009ffff : reserved 000a0000-000bffff : Video RAM area 000c0000-000c7fff : Video ROM 000f0000-000fffff : System ROM 00100000-09ffffff : System RAM 00100000-001d1aad : Kernel code 001d1aae-0021083f : Kernel data 10000000-10000fff : Texas Instruments PCI1131 10001000-10001fff : Texas Instruments PCI1131 (#2) 10400000-107fffff : PCI CardBus #01 10400000-1041ffff : PCI device 10b7:6564 10800000-10bfffff : PCI CardBus #01 10800000-1080007f : PCI device 10b7:6564 10800080-108000ff : PCI device 10b7:6564 10800100-108001ff : PCI device 10b7:6565 10800200-1080027f : PCI device 10b7:6565 10c00000-10ffffff : PCI CardBus #05 11000000-113fffff : PCI CardBus #05 fd000000-fdffffff : Neomagic Corporation NM2160 [MagicGraph 128XD] fea00000-febfffff : Neomagic Corporation NM2160 [MagicGraph 128XD] fecff000-fecfffff : OPTi Inc. 82C861 fed00000-fedfffff : Neomagic Corporation NM2160 [MagicGraph 128XD]
Hi!
Quoted 13 lines
PCMCIA/Cardbus controllers typically (always?) support 2 slots, and system resources are allocated to support those slots. When you build PCMCIA support into your kernel, you are implicitly asking for both slots to be supported. I'm wondering if it would be worthwhile to let the user opt out of supporting one of the slots.
Compaq, in their finite wisdom, only provides a single Type2 Cardbus slot on my Presario 1260 notebook. The controller (a TI PCI1131, see below) can handle 2 slots, of course, but only a single physical connector is present on this machine. Therefore I will never get the use of half of the controller, including the I/O address, etc. that the kernel has allocated for it.
Quoted 2 lines
Would it be worth the savings in system resources to allow support for only a single slot?
Probably not.
Pavel
Signature · 2 lines
I'm [email protected]. "In my country we have almost anarchy and I don't care." Panos Katsaloulis describing me w.r.t. patents at [email protected]