platform_hardware_libhardware

History

Mathias Agopian 3d6ddfe771 fix [1964228] emulator crash with the new GL gralloc didn't keep the error state properly, so after the first pmem allocation failure, it would systematically fail without reverting to ashmem.		2009-07-06 20:54:51 -07:00
..
gralloc	fix [1964228] emulator crash with the new GL	2009-07-06 20:54:51 -07:00
overlay	Integrate from //sandbox/mathias/donut/...@145728	2009-04-10 14:24:31 -07:00
README.android	auto import from //depot/cupcake/@135843	2009-03-03 19:32:14 -08:00

README.android

Default (and possibly architecture dependents) HAL modules go here. 


libhardware.so eventually should contain *just* the HAL hub
(hardware.c), everything in it should be rewritten as modules.

Modules are .so in /system/libs/hw/ and have a well defined naming
convention:

    /system/libs/hw/<*_HARDWARE_MODULE_ID>.<ro.product.board>.so
    /system/libs/hw/<*_HARDWARE_MODULE_ID>.<ro.board.platform>.so
    /system/libs/hw/<*_HARDWARE_MODULE_ID>.<ro.arch>.so
    /system/libs/hw/<*_HARDWARE_MODULE_ID>.default.so

They also have a well defined interface which lives in include/hardware/.

A module can have several variants: "default", "arch" and "board", and they're
loaded in the "board", "arch" and "default" order.
The source code for the "board" variant, usually lives under partners/...

The source code for "default" and "arch" would usually
live under hardware/modules/.