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By adding the `irq_type` argument, one can explicitly specify whether to use LEGACY, MSI or MSI-X interrupts. We formerly used the `device_phys_config` to implicitly select MSI, however, with the addition of IOMMU support to the platform driver there is at least one instance where we need an MSI for a non-PCI device. Yet, by adding another session argument to the Irq session, we exceed the character limit for session args. Since not all arguments are relevant for LEGACY interrupts resp. MSI, we can split the Irq_connection constructor to handle the two cases separately and omit unneeded arguments. genodelabs/genode#5002 |
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| README | ||
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.