* mmap support

* mmap support

[bsp/ChangeLog]
2001-03-13  Frank Ch. Eigler  <fche@redhat.com>

        * configrun-sid.in: Add "mmap" memory region option.
        Document it and others in "--help" text.

[component/memory/ChangeLog]
2001-03-13  Frank Ch. Eigler  <fche@redhat.com>

        Adding support for memory-mapped files and pin-based error signalling.
        * generic.cxx (generic_memory ctor): Add three new pins.
        (generic_memory dtor): munmap if mapping.
        (attempt_resize): Drive error pin when needed.  munmap if mapping.
        (imageload_handler, imagestore_handler): Drive error pin when needed.
        (imagemsync_handler, imagemmap_handler): New functions.
        * generic.h: Corresponding changes.
        * hw-memory-ram_rom-basic.txt: Document extensions.

[component/testsuite/ChangeLog]
2001-03-13  Frank Ch. Eigler  <fche@redhat.com>

        * sidcomp.mapper/busif.exp: Disable if !enable_shared.
        * sidcomp.memory/genericmemory.exp: Add tests for mmap functions.