[linux-usb-devel] RE: What does this code snippet check for?

2001-07-02 Thread Yang, Neil L
Hi Brad, I'm now using pci-sa.c and I no longer get the warnings about using a20. Thanks. I'm trying to use the usb on an Accelent system. Can you point me to where I should look to check zone0/1 allocations to ensure they're not broken? After pci-sa.c, soon after the host controller

[linux-usb-devel] Re: What does this code snippet check for?

2001-07-02 Thread Brad Parker
If you are getting these warnings then you have a serious problem and the hardware will not work. I am guessing, but if you are seeing these messages you must not be using the pci_map/unmap_single routines in arch/arm/arch-sa1100/pci-sa.c I'm not sure how you managed to do that, but you *mu

[linux-usb-devel] Re: What does this code snippet check for?

2001-06-29 Thread John Dorsey
On Friday, June 29, 2001, at 01:19 AM, Yang, Neil L wrote: > Thanks for the info. > You mentioned that modern kernels should be allocating DMA-safe buffers > from > a region in RAM known to be safe from this bug. I'm actually getting > that > warning, but I'm using linux 2.4.5-rmk6-np1 kernel

[linux-usb-devel] RE: What does this code snippet check for?

2001-06-28 Thread Yang, Neil L
Hi, Thanks for the info. You mentioned that modern kernels should be allocating DMA-safe buffers from a region in RAM known to be safe from this bug. I'm actually getting that warning, but I'm using linux 2.4.5-rmk6-np1 kernel, on an assabet/neponset-like board. Do you know where the kernel a

[linux-usb-devel] Re: What does this code snippet check for?

2001-06-28 Thread John Dorsey
On Thursday, June 28, 2001, at 09:19 PM, Yang, Neil L wrote: > if( (((unsigned long)td->hwCBP) & 0x10) ) { > printk("td_fill() hwCBP %p, a20!\n", (void *)td->hwCBP); > > } See the SA- specification update. DMA transfers having a particular address bit set gene