mirror of
https://github.com/genodelabs/genode.git
synced 2025-02-21 18:06:50 +00:00
a4c59c03e3
The change "core: allow offset-attached managed dataspaces" addressed a corner case of the use of nested region maps. Apparently, this change negatively affects other scenarios (tool_chain_auto). In order to confidently cover all the differnt situations, this patch reworks the page-fault resolution code for improved clarity and safety, by introducing dedicated result types, reducing the use of basic types, choosing expressive names, and fostering constness. It also introduces a number of 'print' hooks that greatly ease manual instrumentation and streamlines the error messages printed by core. Those messages no longer appear when a user-level page-fault handler is reistered for the faulted-at region map. So the monitor component produces less noise on the attempt to dump non-existing memory. Issue #4917 Fixes #4920
This is the generic Genode base system, which consists of two parts: :_Core_: is the root of the Genode component tree. It provides abstractions for the lowest-level hardware resources such as RAM, ROM, CPU, and device access. All generic parts of core can be found here. For kernel-specific parts, refer to the appropriate 'base-<kernel>' directory. :_Base libraries and interfaces: that are used by each Genode component to interact with other components. This is the glue that holds everything together. Depending on the used kernel, core may export information about the hardware platform as a ROM called 'platform_info'. For example, if the ACPI RSDT and XSDT physical pointer are reported by the used kernel and/or bootloader, core provides this information in the ROM as follows. !<platform_info> ! <acpi revision="2" rsdt="0x1fe93074" xsdt="0x1fe930e8"/> ! <boot> ! <framebuffer phys="0x7300000" width="1024" height="768" bpp="32"/> ! </boot> !</platform_info> If the graphics device is initialised and can be directly used by a framebuffer driver, core provides the physical pointer to the framebuffer, the resolution, and color depth in bits.