Re: [Alsa-devel] Non-coherent memory mapped devices

2003-03-19 Thread Takashi Iwai
Hi, At Tue, 18 Mar 2003 20:48:08 +0100, Laurent Canet wrote: > > Hi, > > On the HPPA architecture, devices (including sound ones) are memory-mapped. > On particular machines, memory access to devices are not consistent, > i.e. data wrote to memory could be cached by the CPU, thus inacessible >

Re: [Alsa-devel] Non-coherent memory mapped devices

2003-03-18 Thread Jaroslav Kysela
On Tue, 18 Mar 2003, Laurent Canet wrote: > Hi, > > On the HPPA architecture, devices (including sound ones) are memory-mapped. > On particular machines, memory access to devices are not consistent, > i.e. data wrote to memory could be cached by the CPU, thus inacessible > to the device. > To a

[Alsa-devel] Non-coherent memory mapped devices

2003-03-18 Thread Laurent Canet
Hi, On the HPPA architecture, devices (including sound ones) are memory-mapped. On particular machines, memory access to devices are not consistent, i.e. data wrote to memory could be cached by the CPU, thus inacessible to the device. To avoid inconsistency in memory writes, there are arch-dep f