On Thu, 2016-06-02 at 18:31 +0000, Zbigniew Bodek wrote: > Author: zbb > Date: Thu Jun 2 18:31:36 2016 > New Revision: 301220 > URL: https://svnweb.freebsd.org/changeset/base/301220 > > Log: > Map CESA SRAM memory in driver attach for Armada38x > > On other platforms with CESA accelerator the SRAM memory is mapped > in > early init before driver is attached. This method only works > correctly > with mappings no smaller than L1 section size (1MB). There may be > more > SRAM blocks and they may have smaller sizes than 1MB as is the case > for Armada38x. Instead, map SRAM memory with bus_space_map() in > CESA > driver attach. Note that we can no longer assume that VA == PA for > the > SRAM. > > Submitted by: Michal Stanek <m...@semihalf.com > Obtained from: Semihalf > Sponsored by: Stormshield > Differential revision: https://reviews.freebsd.org/D6215 > [...] > - > + rv = OF_getprop(sram_node, "reg", (void *)sram_reg, > sizeof(sram_reg)); > + if (rv <= 0) > + return (rv); > + > + sc->sc_sram_base_pa = fdt32_to_cpu(sram_reg[0]); > + /* Store SRAM size to be able to unmap in detach() */ > + sc->sc_sram_size = fdt32_to_cpu(sram_reg[1]); > +
OF_getprop() followed by fdt32_to_cpu() calls is properly spelled OF_getencprop() (with no fdt32_to_cpu calls). > +#if defined(SOC_MV_ARMADA38X) > + /* SRAM memory was not mapped in platform_sram_devmap(), map > it now */ > + rv = bus_space_map(fdtbus_bs_tag, sc->sc_sram_base_pa, sc > ->sc_sram_size, > + 0, &(sc->sc_sram_base_va)); bus_space_map() returns a bus_space_handle_t for use with other bus_space functions. The handle is not necessarily "just the virtual address" (although that happens to be the case right now on arm). I don't see any bus_space_xxxxx() calls using this handle, that means that probably the correct function to use is pmap_mapdev(), not bus_space_map(). -- Ian _______________________________________________ svn-src-head@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
