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This patch tightens the coupling of the 'Platform_thread' objects with their corresponding 'Platform_pd' objects by specifying the 'Platform_pd' as constructor argument, keeping the relationship as a reference (instead of a pointer), and constraining the lifetime of 'Platform_pd' objects to the lifetime of the PD. It thereby clears the way to simplify the thread creation since all PD-related information (like quota budgets) are now known at the construction time of the 'Platform_thread'. The return value of 'Platform_thread::start' has been removed because it is not evaluated by 'Cpu_thread_component'. Related to #5256
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.