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Replaced em_mapclean by em_commit
git-svn-id: svn://svn.cc65.org/cc65/trunk@1682 b7a2c559-68d2-44c3-8de9-860c34a00d81
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cuz
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commit
0c38839e79
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@ -53,9 +53,9 @@ EMD_HDR_JUMPCOUNT = 7 ; Number of jump vectors
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;------------------------------------------------------------------------------
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; Offsets into the em_copy structure
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EM_COPY_PAGE = 0
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EM_COPY_BUF = 0
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EM_COPY_OFFS = 2
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EM_COPY_BUF = 3
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EM_COPY_PAGE = 3
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EM_COPY_COUNT = 5
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;------------------------------------------------------------------------------
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@ -70,7 +70,7 @@ EM_COPY_COUNT = 5
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.global emd_deinstall
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.global emd_pagecount
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.global emd_map
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.global emd_mapclean
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.global emd_commit
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.global emd_copyfrom
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.global emd_copyto
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@ -81,7 +81,7 @@ EM_COPY_COUNT = 5
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.global _em_deinstall
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.global _em_pagecount
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.global _em_map
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.global _em_mapclean
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.global _em_commit
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.global _em_copyfrom
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.global _em_copyto
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26
include/em.h
26
include/em.h
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@ -54,11 +54,15 @@
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#define EM_ERR_INV_DRIVER 3 /* Invalid driver */
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#define EM_ERR_NO_DEVICE 4 /* Device (hardware) not found */
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/* Parameters for the em_copy_... functions */
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/* Parameters for the em_copy_... functions. NOTE: The first seven bytes
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* have the same order and alignment as needed for the Commodore REU, so
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* don't change the order without changing the assembler file that defines
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* the struct offsets and the code in the REU driver.
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*/
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struct em_copy {
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unsigned page; /* Starting page to copy from or to */
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unsigned char offs; /* Offset into page */
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void* buf; /* Memory buffer to copy from or to */
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unsigned char offs; /* Offset into page */
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unsigned page; /* Starting page to copy from or to */
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unsigned count; /* Number of bytes to copy */
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unsigned char unused; /* Make the size 8 bytes */
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};
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@ -82,16 +86,16 @@ unsigned em_pagecount (void);
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void* __fastcall__ em_map (unsigned page);
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/* Unmap the current page from memory and map a new one. The function returns
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* a pointer to the location of the page in memory.
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* a pointer to the location of the page in memory. Note: Without calling
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* em_commit, the old contents of the memory window may be lost!
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*/
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void* __fastcall__ em_mapclean (unsigned page);
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/* Unmap the current page from memory and map a new one. The function returns
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* a pointer to the location of the page in memory. This function differs from
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* em_map_page() in that it will discard the contents of the currently mapped
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* page, assuming that the page has not been modified or that the modifications
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* are no longer needed, if this leads to better performance. NOTE: This does
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* NOT mean that the contents of currently mapped page are always discarded!
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void __fastcall__ em_commit (void);
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/* Commit changes in the memory window to extended storage. If the contents
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* of the memory window have been changed, these changes may be lost if
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* em_map, em_copyfrom or em_copyto are called without calling em_commit
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* first. Note: Not calling em_commit does not mean that the changes are
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* discarded, it does just mean that some drivers will discard the changes.
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*/
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void __fastcall__ em_copyfrom (const struct em_copy* copy_data);
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@ -29,7 +29,7 @@
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.word DEINSTALL
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.word PAGECOUNT
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.word MAP
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.word MAPCLEAN
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.word COMMIT
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.word COPYFROM
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.word COPYTO
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@ -81,8 +81,8 @@ PAGECOUNT:
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; ------------------------------------------------------------------------
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; MAP: Map the page in a/x into memory and return a pointer to the page in
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; a/x. The contents of the currently mapped page (if any) are assumed to be
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; dirty and must be saved into secondary storage if this is necessary.
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; a/x. The contents of the currently mapped page (if any) may be discarded
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; by the driver.
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;
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MAP: sta tmp1
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@ -100,16 +100,13 @@ MAP: sta tmp1
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lda #<GR_WINDOW
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ldx #>GR_WINDOW
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rts
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; Use the RTS from COMMIT below to save a precious byte of storage
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; ------------------------------------------------------------------------
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; MAPCLEAN: Map the page in a/x into memory and return a pointer to the page
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; in a/x. The contents of the currently mapped page (if any) are assumed to
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; be clean, so if this is an advantage for the driver, the current contents
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; may be discarded.
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MAPCLEAN = MAP ; Identical for GEORAM
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; COMMIT: Commit changes in the memory window to extended storage.
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COMMIT: rts
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; ------------------------------------------------------------------------
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; COPYFROM: Copy from extended into linear memory. A pointer to a structure
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@ -14,10 +14,10 @@
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C_OBJS = em_load.o
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S_OBJS = em-kernel.o \
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em_commit.o \
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em_copyto.o \
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em_copyfrom.o \
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em_map.o \
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em_mapclean.o \
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em_pagecount.o \
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em_unload.o \
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@ -27,7 +27,7 @@ emd_install: jmp $0000
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emd_deinstall: jmp $0000
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emd_pagecount: jmp $0000
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emd_map: jmp $0000
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emd_mapclean: jmp $0000
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emd_commit: jmp $0000
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emd_copyfrom: jmp $0000
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emd_copyto: jmp $0000
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16
libsrc/em/em_commit.s
Normal file
16
libsrc/em/em_commit.s
Normal file
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@ -0,0 +1,16 @@
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;
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; Ullrich von Bassewitz, 2002-12-01
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;
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; void __fastcall__ em_commit (void);
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; /* Commit changes in the memory window to extended storage. If the contents
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; * of the memory window have been changed, these changes may be lost if
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; * em_map, em_copyfrom or em_copyto are called without calling em_commit
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; * first. Note: Not calling em_commit does not mean that the changes are
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; * discarded, it does just mean that some drivers will discard the changes.
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; */
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.include "em-kernel.inc"
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_em_commit = emd_commit ; Use driver entry
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@ -1,17 +0,0 @@
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;
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; Ullrich von Bassewitz, 2002-11-29
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;
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; void* __fastcall__ em_mapclean (unsigned page);
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; /* Unmap the current page from memory and map a new one. The function returns
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; * a pointer to the location of the page in memory. This function differs from
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; * em_map_page() in that it will discard the contents of the currently mapped
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; * page, assuming that the page has not been modified or that the modifications
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; * are no longer needed, if this leads to better performance. NOTE: This does
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; * NOT mean that the contents of currently mapped page are always discarded!
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; */
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.include "em-kernel.inc"
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_em_mapclean = emd_mapclean ; Use driver entry
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