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Added library reference em_libref to EMD interface.

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Occasionally dynamically drivers suffer from not being to refer to
content in the C library. Therefore I added a mechanism to allow
a C library for a certian target to define a symbol that will be
handed over to dynamic drivers for that target. Then the drivers
can use their refernce to that symbol to access content in the C
library.
This commit is contained in:
Oliver Schmidt
2013-06-01 00:11:31 +02:00
parent 7024e2789d
commit 619b215260
31 changed files with 364 additions and 206 deletions
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21
asminc/em-kernel.inc
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@@ -39,28 +39,29 @@
.struct EMD_HDR
ID .byte 3 ; Contains 0x65, 0x6d, 0x64 ("emd")
VERSION .byte 1 ; Interface version
LIBREF .addr ; Library reference
JUMPTAB .struct
INSTALL .word ; INSTALL routine
UNINSTALL .word ; UNINSTALL routine
PAGECOUNT .word ; PAGECOUNT routine
MAP .word ; MAP routine
USE .word ; USE routine
MAPCLEAN .word ; MAPCLEAN routine
COPYFROM .word ; COPYFROM routine
COPYTO .word ; COPYTO routine
INSTALL .addr ; INSTALL routine
UNINSTALL .addr ; UNINSTALL routine
PAGECOUNT .addr ; PAGECOUNT routine
MAP .addr ; MAP routine
USE .addr ; USE routine
MAPCLEAN .addr ; MAPCLEAN routine
COPYFROM .addr ; COPYFROM routine
COPYTO .addr ; COPYTO routine
.endstruct
.endstruct
;------------------------------------------------------------------------------
; The EMD API version, stored in EMD_HDR::VERSION
EMD_API_VERSION = $00
EMD_API_VERSION = $01
;------------------------------------------------------------------------------
; The asm equivalent to the C em_copy structure
.struct EM_COPY
BUF .word ; Memory buffer to copy from or to
BUF .addr ; Memory buffer to copy from or to
OFFS .byte ; Offset into page
PAGE .word ; Starting page to copy from or to
COUNT .word ; Number of bytes to copy