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Re: adding user space memory to redboot?
- To: "Bryan D. Payne" <bdpayne at cs dot umd dot edu>
- Subject: Re: [ECOS] adding user space memory to redboot?
- From: Jonathan Larmour <jlarmour at redhat dot com>
- Date: Wed, 31 Oct 2001 16:05:26 +0000
- Cc: ecos-discuss at sources dot redhat dot com
- Organization: Red Hat UK Ltd.
- References: <Pine.SOL.4.21.0110311050240.29620-100000@babyruth.cs.umd.edu>
"Bryan D. Payne" wrote:
>
> > What's your PC memory configuration? The memory map for the redboot on the
> > PC is a bit unorthodox - everything under 640K is reserved for redboot, and
> > everything above 1M can be used for an app.
>
> The PC is a typical desktop PC...it has 256 MB ram on the system. But
> redboot is only reporting the following on boot...
>
> RAM: 0x00000000-0x000a0000, 0x00088900-0x000a0000 available
>
> >From what I read in the code, this means that the 0x00088900-0x000a0000
> range (i.e., 96,000 bytes) is available to the user apps, which seems kind
> of small. Specifically, I need a larger chunk of memory that can be used
> by malloc (for elf loading).
No that's because we haven't got any way of exporting disjoint memory
regions from the HAL to RedBoot yet. eCos applications will actually load
above 0x100000.
Jifl
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