On 1 May 2002, Michel Dänzer wrote: > On Tue, 2002-04-30 at 23:53, Leif Delgass wrote: > > On Tue, 30 Apr 2002, José Fonseca wrote: > > > > > On 2002.04.30 22:07 José Fonseca wrote: > > > > ... Next in mach64_drv.h, let's try the following definitions for the > > > > MMIO: > > > > > > > > #define MACH64_READ(reg) readl(MACH64_ADDR(reg)) > > > > #define MACH64_WRITE(reg,val) writel(MACH64_ADDR(val, reg)) > > > > > > > > > > Sorry, i've mistaken writting it. It's instead > > > > > > #define MACH64_READ(reg) readl(MACH64_ADDR(reg)) > > > #define MACH64_WRITE(reg,val) writel(val, MACH64_ADDR(reg)) > > > > There's a wrinkle for the vertex buffers though. The register offsets and > > data in the buffer have already been swapped to little-endian, whereas the > > state updates and such using the DMA* macros (which in turn use > > MACH64_WRITE) pass data to the macros in cpu endianess. So in the > > pseudo-DMA code in _dispatch_vertex, I changed the > > > > MACH64_WRITE(reg, *p++); > > > > to > > > > MACH64_DEREF(reg) = *p++; > > Maybe better > > MACH64_WRITE(le32_to_cpu(*p++), reg); > > ? > > > because the value (*p) is already little-endian, whereas the register > > address has to be swapped from little-endian back to big-endian for the > > MMSELECT(reg). So wouldn't you have to swap the value back to big-endian > > as well in order to use this modified MACH64_WRITE macro? > > Yes, but it's already done correctly AFAICS on mach64_state.c line 530: > > reg = le32_to_cpu(*p++); >
That's the register address (addresses and data are interleaved in the buffer pointed to by p). The data isn't swapped back to little-endian, but your suggestion above should work (just need to switch the args): MACH64_WRITE(reg, le32_to_cpu(*p++)); -- Leif Delgass http://www.retinalburn.net _______________________________________________________________ Have big pipes? SourceForge.net is looking for download mirrors. We supply the hardware. You get the recognition. Email Us: [EMAIL PROTECTED] Dri-devel mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/dri-devel
