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Restrict B_DMA_HIGH_ADDRESS to 4 GB. AHCI can generally support 64 bit DMA,

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but whether the respective controller does is indicated by a capability flag,
which we can't easily access at this point.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@37228 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Ingo Weinhold 2010-06-23 13:36:08 +00:00
parent 5e679f282f
commit 8d71819a01
1 changed files with 4 additions and 0 deletions
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src/add-ons/kernel/busses/scsi/ahci/ahci.c
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@ -242,6 +242,10 @@ ahci_register_device(device_node *parent)
{ B_DMA_MAX_SEGMENT_BLOCKS, B_UINT32_TYPE, { ui32: 0x10000 }},
{ B_DMA_MAX_SEGMENT_COUNT, B_UINT32_TYPE,
{ ui32: 32 /* whatever... */ }},
{ B_DMA_HIGH_ADDRESS, B_UINT64_TYPE, { ui64: 0x100000000LL }},
// TODO: We don't know at this point whether 64 bit addressing is
// supported. That's indicated by a capability flag. Play it safe
// for now.
{ NULL }
};