A an equivalent function that does this is pci_alloc_consistent or dma_alloc_coherent which ensures cache coherency. Please refer Documentation/DMA-API.txt of the linux source repository. Thayumanavar S. On 8/29/05, Garcia Jérémie <GARCIAJ@xxxxxx> wrote: > Hi everybody, I have to port a vxWorks appz to Linux Montavista running on a powerPC 405EP based architecture. > In this one, we use the following vxWorks system call: cacheDmaMalloc( ) whose man page is : > > NAME > cacheDmaMalloc( ) - allocate a cache-safe buffer for DMA devices and drivers > > SYNOPSIS > void * cacheDmaMalloc > ( > size_t bytes /* number of bytes to allocate */ > ) > > DESCRIPTION > This routine returns a pointer to a section of memory that will not experience any cache coherency problems. Function pointers in the CACHE_FUNCS structure provide access to DMA support routines. > > RETURNS > A pointer to the cache-safe buffer, or NULL. > > > I need to handle the given amount of memory from the user space. > So could anyone told how to achieve the same goal on Linux with these constraints? > > Tks a lot for your precious help! > > -- > Kernelnewbies: Help each other learn about the Linux kernel. > Archive: http://mail.nl.linux.org/kernelnewbies/ > FAQ: http://kernelnewbies.org/faq/ > > -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
