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Old 02-26-2004, 10:57 AM   #1
Registered: Oct 2003
Location: Sweden
Distribution: Slackware64-current, SlackwareARM-15.0
Posts: 825

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PCMCIA & high memory space

I have a laptop running Slack 9.1 with 2.6.3 kernel, connecting to the internet with a pcmcia ethernet card.

Sometimes I get the following nice message at boot:

cs: IO port probe 0x0c00-0x0cff: clean
However, at other times I get the following stuff (no clue what it depends on):

cs: warning: no high memory space available!
cs: unable to map card memory!
Strangely enough, whichever message, the card works well.

I didn't enable high mem support in the kernel, since I only have 256 MB RAM. Should I enable it, or am I mixing things up here?

Anyone an idea how this is caused, and what to do to make it right?

Thanx, Leon
Old 02-26-2004, 12:13 PM   #2
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Registered: Jan 2004
Location: Montpellier (France)
Distribution: Gentoo
Posts: 1,014

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see this link:
section 3.5: "memory probe failures" may help you
Old 03-03-2004, 03:18 AM   #3
Registered: Oct 2003
Location: Sweden
Distribution: Slackware64-current, SlackwareARM-15.0
Posts: 825

Original Poster
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High memory window


Can anyone explain me how to define high memory windows (as suggested in the pcmcia-HOWTO, see below)? Or how to recognise low vs high memory? Those weird numbers don't mean much to me ;-)

This is from the pcmcia-howto:
* cs: warning: no high memory space available!

CardBus bridges can allocate memory windows outside of the 640KB-1MB ``memory hole'' in the ISA bus architecture. It is generally a good idea to configure CardBus bridges to use high memory windows, because these are unlikely to conflict with other devices. Also, CardBus cards may require large memory windows, which may be difficult or impossible to fit into low memory. Card Services will preferentially allocate windows in high memory for CardBus bridges, if both low and high memory windows are defined in config.opts. The default config.opts includes several candidate high memory windows, one of which will work in most cases.
This is from my /etc/pcmcia/config.opts:
include port 0x100-0x4ff, port 0x800-0x8ff, port 0xc00-0xcff
include memory 0xc0000-0xfffff
include memory 0xa0000000-0xa0ffffff, memory 0x60000000-0x60ffffff

# High port numbers do not always work...
# include port 0x1000-0x17ff

# Extra port range for IBM Token Ring
# include port 0xa00-0xaff

# Resources we should not use, even if they appear to be available

# First built-in serial port
exclude irq 4
# Second built-in serial port
#exclude irq 3
# First built-in parallel port
#exclude irq 7


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