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-CONTENT:
-
-   epic.h
-   epic1.c
-   epic2.s
-
-WHAT ARE THESE FILES:
-
-These files contain MPC8240 (Kahlua) EPIC
-driver routines. The driver routines are not
-written for any specific operating system.
-They serves the purpose of code sample, and
-jump-start for using the MPC8240 EPIC unit.
-
-For the reason of correctness of C language
-syntax, these files are compiled by Metaware
-C compiler and assembler.
-
-ENDIAN NOTATION:
-
-The algorithm is designed for big-endian mode,
-software is responsible for byte swapping.
-
-USAGE:
-
-1. The host system that is running on MPC8240
-   shall link the files listed here. The memory
-   location of driver routines shall take into
-   account of that driver routines need to run
-   in supervisor mode and they process external
-   interrupts.
-
-   The routine epic_exception shall be called by
-   exception vector at location 0x500, i.e.,
-   603e core external exception vector.
-
-2. The host system is responsible for configuring
-   the MPC8240 including Embedded Utilities Memory
-   Block. All EPIC driver functions require the
-   content of Embedded Utilities Memory Block
-   Base Address Register, EUMBBAR, as the first
-   parameter.
-
-3. Before EPIC unit of MPC8240 can be used,
-   initialize EPIC unit by calling epicInit
-   with the corresponding parameters.
-
-   The initialization shall disable the 603e
-   core External Exception by calling CoreExtIntDisable( ).
-   Next, call epicInit( ). Last, enable the 603e core
-   External Exception by calling CoreExtIntEnable( ).
-
-4. After EPIC unit has been successfully initialized,
-   epicIntSourceSet( ) shall be used to register each
-   external interrupt source. Anytime, an external
-   interrupt source can be disabled or enabled by
-   calling corresponding function, epicIntDisable( ),
-   or epicIntEnable( ).
-
-   Global Timers' resource, base count and frequency,
-   can be changed by calling epicTmFrequencySet( )
-   and epicTmBaseSet( ).
-
-   To stop counting a specific global timer, use
-   the function, epicTmInhibit while epicTmEnable
-   can be used to start counting a timer.
-
-5. To mask a set of external interrupts that are
-   are certain level below, epicIntPrioritySet( )
-   can be used. For example, if the processor's
-   current task priority register is set to 0x7,
-   only interrupts of priority 0x8 or higher will
-   be passed to the processor.
-
-   Be careful when using this function. It may
-   corrupt the current interrupt pending, selector,
-   and request registers, resulting an invalid vetor.
-
-   After enabling an interrupt, disable it may also
-   cause an invalid vector. User may consider using
-   the spurious vector interrupt service routine to
-   handle this case.
-
-6. The EPIC driver routines contains a set
-   of utilities, Set and Get, for host system
-   to query and modify the desired EPIC source
-   registers.
-
-7. Each external interrupt source shall register
-   its interrupt service routine. The routine
-   shall contain all interrupt source specific
-   processes and keep as short as possible.
-
-   Special customized end of interrupt routine
-   is optional. If it is needed, it shall contain
-   the external interrupt source specific end of
-   interrupt process.
-
-   External interrupt exception vector at 0x500
-   shall always call the epicEOI just before
-   rfi instruction. Refer to the routine,
-   epic_exception, for a code sample.