d273e10d2d
Protect against multiple inclusion.
1998-06-24 01:04:26 +00:00
d08070a693
Add a comment describing the locking needs of the alpha_sgmap.
1998-06-06 20:12:28 +00:00
9c3ef8899b
Don't conditionally define the sgmap_log_entry structure, and turn off
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SGMAP logging by default.
1998-01-21 22:36:10 +00:00
e62d894d7a
Implement a prefetch spill page for SGMAP DMA. This works around a slight
...
annoyance on systems that prefetch the next page during memory -> device
DMA if the DMA comes within a certain distance of the end of the current
page. This could cause machine checks since the PTE after the last page
would not have the valid bit set.
(I'm not going to complain about this slight kludge too much, since prefetch
makes DMA much faster...)
1998-01-18 00:05:33 +00:00
3366b987d0
Put SGMAP-related stuff in the DMA map structure directly, rather than
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indirecting through a pointer.
1998-01-17 21:53:52 +00:00
2981fec2f0
Allow specification of a minimum page table alignment to alpha_sgmap_init().
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This is to work around an apparent hardware bug in some 2117x chipsets
where the page table must be aligned to at least 32k.
1998-01-17 03:37:22 +00:00
2f657a6266
Add some debugging code to log sgmap activities. Also, make sure that
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we return "no valid mappings" if there is an error while loading the
sgmap.
1997-09-05 02:21:49 +00:00
413f678ce0
Pull the thorpej-bus-dma branch into the mainline.
1997-06-07 05:29:33 +00:00
ross