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diff --git a/doc/hardware.md b/doc/hardware.md index 669f896..44e26d0 100644 --- a/doc/hardware.md +++ b/doc/hardware.md @@ -13,6 +13,18 @@ for extra parallelism and/or granularity in power switching). For example the Ma with only the 3D engine as well as a GC300 with only the 2D engine. Similarly, the Freescale i.mx6 SoC has a GC2000 with the 3D engine, a GC320 with 2D engine and a GC355 with VG engine. +- State space is a 256kB (65536 times uint32) register file divided up into + separate units for parts of the chip (such as PE, RS, ...) + +- Most of the state is latched; that means if it's set to a certain value, it + will keep that value until the next change + +- Instead of programming the registers directly (which is possible from kernel + space), the FE, a DMA engine, is used to queue state changes for later + +- To perform an operation such as rendering, all the state for doing that + operation have been programmed to the desired values + Feature bits ================= |