I want to know who fills the configuration space of a particular device of PCI at the first place when a new device is connected to the PCI bus. I know both bios and operating system can configure the PCI space but who gives the information of the device to both of them.
who fills the device configuration space of pci?
431 Views Asked by karan sharma At
1
There are 1 best solutions below
Related Questions in LINUX
- Is there some way to use printf to print a horizontal list of decrementing hex digits in NASM assembly on Linux
- Why does Hugo generate different taxonomy-related HTML on different OS's?
- Writes in io_uring do not advance the file offset
- Why `set -o pipefail` gives different output even though the pipe is not failing
- what really controls the permissions: UID or eUID?
- Compiling eBPF program in Docker fails due to missing '__u64' type
- Docker container unable to make HTTPS requests to external API
- Whow to use callback_query_handler in Python 3.10
- Create kea runtime directory at startup in Yocto image
- Problem on CPU scheduling algorithms in OS
- How to copy files into the singularity sandbox?
- Android kernel error: undefined reference to `get_hw_version_platform'
- Is there a need for BPF Linux namespace?
- Error when trying to execute a binary compiled in a Kali Linux machine on an Ubuntu system
- Issue with launching application after updating ElectronJs to version 28.0.0 on Windows and Linux
Related Questions in LINUX-DEVICE-DRIVER
- Linux support for parallel Pixel data Image sensor
- Linux to QNX USB driver convert
- IRQ interrupt obtaining abnormal possibilities
- Error compiling dts (Device Tree source) file for dtb
- How to write the external interrupt callback function of Linux kernel v3.10?
- Does traffic control (tc) command have a rate limit?
- The module first installed the alarm when it started
- How does the Linux kernel now what to put in platform_data?
- How to reduce cached memory used by Linux kernel on embedded linux platform
- Notifying Linux MMC subsystem about power loss
- Linux kernel 6.6 from block_device how to find out if it has mounted file system
- Linux SPI read and write may occasionally be slow?
- gettimeofday calculates the runtime, with occasional significant deviations?
- uImage is not supported in kexec_file
- Linux of_platform_depopulate() does not remove drivers
Related Questions in PCI-E
- How to request a Vendor ID during enumeration with ECAM?
- Recording and Checking the disk read write speed of a python program
- Getting Page Fault while accessing another PCIe NTB switch(SW2 NTB1) from one PCIe NTB switch(SW1 NTB0)
- PCIe integration with ePRosima FastDDS layer of ROS2 humble as custom transport
- How to check whether the PCIe Memory-mapped BAR region is cacheable or uncacheable
- Want to know the PCIe MMIO request payload unit size
- finding PCI domain number for extended BDF
- UEFI Application for pci link test
- How to create a PCI node in devicetree for server platforms?
- PCIe Root Complex deadlock by PCIe Endpoint device
- PCIe MSI Interrupts directly into Userspace with VFIO & IOMMU
- Could not read operational registers value through 4-port usb3.0 host controller
- Since PCIe write TLP is Post, what will happen when CPU access memory mapped bar address very frequently?
- How to modify the information field passed by the PCI device to the kernel during initialization?
- Do PCI and PCIe allow change BAR value to remap device registers to new address?
Related Questions in PCI-BUS
- Getting Page Fault while accessing another PCIe NTB switch(SW2 NTB1) from one PCIe NTB switch(SW1 NTB0)
- Since PCIe write TLP is Post, what will happen when CPU access memory mapped bar address very frequently?
- How to understand the base address in Legacy PCI BARs?
- Hidden PCI device
- Embedded linux setup PCIe IPC transfer data line
- Monitor/sniff PCI I/O under Windows and Linux
- addressing mechanism for a device which can work on both 32- and 64-bit PCI buses
- address space and wait states for a PCI device
- Why is AD[1:0] not needed during the address phase of a 32-bit PCI memory transaction?
- How to access pci device from another device
- 64-Bit PCI BAR on a 32-Bit Operating System - Possible?
- According to the standard PCI bus scan but the result is abnormal
- What does accuracy means in PCIe local clock?
- why there is a shift from parallel to serial bus in pcie?
- pci_rescan_bus() doesn't rescan PCI bus in Linux
Trending Questions
- UIImageView Frame Doesn't Reflect Constraints
- Is it possible to use adb commands to click on a view by finding its ID?
- How to create a new web character symbol recognizable by html/javascript?
- Why isn't my CSS3 animation smooth in Google Chrome (but very smooth on other browsers)?
- Heap Gives Page Fault
- Connect ffmpeg to Visual Studio 2008
- Both Object- and ValueAnimator jumps when Duration is set above API LvL 24
- How to avoid default initialization of objects in std::vector?
- second argument of the command line arguments in a format other than char** argv or char* argv[]
- How to improve efficiency of algorithm which generates next lexicographic permutation?
- Navigating to the another actvity app getting crash in android
- How to read the particular message format in android and store in sqlite database?
- Resetting inventory status after order is cancelled
- Efficiently compute powers of X in SSE/AVX
- Insert into an external database using ajax and php : POST 500 (Internal Server Error)
Popular # Hahtags
Popular Questions
- How do I undo the most recent local commits in Git?
- How can I remove a specific item from an array in JavaScript?
- How do I delete a Git branch locally and remotely?
- Find all files containing a specific text (string) on Linux?
- How do I revert a Git repository to a previous commit?
- How do I create an HTML button that acts like a link?
- How do I check out a remote Git branch?
- How do I force "git pull" to overwrite local files?
- How do I list all files of a directory?
- How to check whether a string contains a substring in JavaScript?
- How do I redirect to another webpage?
- How can I iterate over rows in a Pandas DataFrame?
- How do I convert a String to an int in Java?
- Does Python have a string 'contains' substring method?
- How do I check if a string contains a specific word?
The read-only fields of the PCI configuration space, identifying the device and its capabilities, are built-in to the device, not filled in by software.
Some fields, such as the BARs, are configured by the BIOS, as part of its responsibility to set up the address map of the system. The rest of the fields are programmed by the OS or the device driver. (The BIOS may also have a driver for the device, if the device may be used to boot the system.)
Decisions of these three software components (BIOS, OS, and driver) are based on rules and policies built into the software by its designers and/or configured by the system installer or user. For example, BIOS setup menus often have settings to control where the BAR regions may be placed. In Windows, information used to configure devices may come from the registry.