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| <== Date ==> | <== Thread ==> |
|---|
| Subject: | Re: "A32 RegisterAddress error" about Hytec8401 |
| From: | Dirk Zimoch <[email protected]> |
| To: | Andrew Johnson <[email protected]> |
| Cc: | Michael Abbott <[email protected]>, [email protected] |
| Date: | Thu, 18 Jun 2009 10:59:30 +0200 |
Andrew Johnson wrote:
Hi Liu Ping,
...
Read the target.txt file in your target/config/<bsp> directory, it should document the window mappings. Look for the VME_A32_MSTR_BUS and VME_A32_MSTR_SIZE variables; you may be able to just modify them and rebuild the BSP, but don't just make the window as large as possible because that can significantly slow down the startup of the vxWorks image at boot time and also use up memory in MMU page tables.
If you are using a PPC cpu, then there are other ways to map 1GB of A32 space without slowing down vxWorks or using MMU tables. If you are interested ask me.
Dirk -- Dr. Dirk Zimoch Paul Scherrer Institut, WBGB/006 5232 Villigen PSI, Switzerland Phone +41 56 310 5182