Module arch

Arch-specific code.

Modules

• egatext
  Stuff for writing and reading to the EGA text buffer.
• interrupts
  Provides interrupt-related functions
• output
  Functions to output to various things
• paging
  Functions and types related to paging.
• ports
  Provides utilities for interacting with assembly ports

Constants

• DEBUG_PORT
  The assembly port number to output debug messages to.

Functions

• cpuid
  Returns information from the CPUID command in the form (ebx, edx, ecx).
• cpuid_extended_functions
  Returns whether extended functions are available (more specifically, 0x80000001 or higher)
• disable_paging
  Disables paging by clearing bit 31 in the cr0 register.
• enable_a20
  Tries to enable the a20 gate by trying many different methods and seeing what sticks.
• enable_a20_ee_port
  Tries to enable the a20 gate by reading from port 0xee.
• enable_a20_fasta20
  Tries to enable the a20 gate via fast a20. Note that this may not work or do something unexpected.
• enable_a20_keyboard
  Tries to enable the a20 gate via the keyboard controller method.
• get_keyboard_data
  Gets data from the keyboard.
• send_keyboard_cmd
  Sends a keyboard command.
• send_keyboard_data
  Sends data to the keyboard.
• test_a20
  Returns whether the a20 gate is enabled.
• wait_for_keyboard_cmd
  Waits for a keyboard command to complete.
• wait_for_keyboard_data
  Waits for there to be data to read from the keyboard.