Add save/restore mapping context routines.
Add map multiple pages routine. Add partial implementation of hardware information query routine. Replace incorrect use of MapSL with PTR_REAL_TO_LIN.
This commit is contained in:
Jukka Heinonen
Alexandre Julliard
parent
ff73250630
commit
d19a64eafa
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@ -75,6 +75,11 @@ struct {
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WORD logical_page; /* logical page */
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} mapping[4];
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struct {
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UCHAR hindex; /* handle number */
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WORD logical_page; /* logical page */
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} mapping_save_area[EMS_MAX_HANDLES][4];
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} *EMS_record = 0;
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/**********************************************************************
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@ -147,13 +152,13 @@ static void EMS_access_name( CONTEXT86 *context )
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switch AL_reg(context) {
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case 0x00: /* get name */
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ptr = MapSL(MAKESEGPTR(context->SegEs, DI_reg(context)));
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ptr = PTR_REAL_TO_LIN(context->SegEs, DI_reg(context));
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memcpy(ptr, EMS_record->handle[hindex].name, 8);
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AH_reg(context) = 0;
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break;
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case 0x01: /* set name */
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ptr = MapSL(MAKESEGPTR(context->SegDs, SI_reg(context)));
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ptr = PTR_REAL_TO_LIN(context->SegDs, SI_reg(context));
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memcpy(EMS_record->handle[hindex].name, ptr, 8);
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AH_reg(context) = 0;
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break;
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@ -169,17 +174,18 @@ static void EMS_access_name( CONTEXT86 *context )
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*
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* Map logical page into physical page.
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*/
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static void EMS_map( CONTEXT86 *context )
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static BYTE EMS_map( WORD physical_page, WORD new_hindex, WORD new_logical_page )
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{
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int physical_page = AL_reg(context);
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int new_hindex = DX_reg(context);
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int new_logical_page = BX_reg(context);
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int old_hindex;
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int old_logical_page;
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void *physical_address;
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int old_hindex = EMS_record->mapping[physical_page].hindex;
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int old_logical_page = EMS_record->mapping[physical_page].logical_page;
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if(physical_page > 3)
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return 0x8b; /* status: invalid physical page */
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void *physical_address = EMS_PAGE_ADDRESS(EMS_record->frame_address,
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physical_page);
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old_hindex = EMS_record->mapping[physical_page].hindex;
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old_logical_page = EMS_record->mapping[physical_page].logical_page;
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physical_address = EMS_PAGE_ADDRESS(EMS_record->frame_address, physical_page);
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/* unmap old page */
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if(old_hindex) {
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@ -192,6 +198,13 @@ static void EMS_map( CONTEXT86 *context )
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if(new_hindex && new_logical_page != 0xffff) {
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void *ptr = EMS_PAGE_ADDRESS(EMS_record->handle[new_hindex].address,
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new_logical_page);
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if(new_hindex >= EMS_MAX_HANDLES || !EMS_record->handle[new_hindex].address)
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return 0x83; /* status: invalid handle */
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if(new_logical_page >= EMS_record->handle[new_hindex].pages)
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return 0x8a; /* status: invalid logical page */
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memcpy(physical_address, ptr, EMS_PAGE_SIZE);
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EMS_record->mapping[physical_page].hindex = new_hindex;
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EMS_record->mapping[physical_page].logical_page = new_logical_page;
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@ -200,7 +213,35 @@ static void EMS_map( CONTEXT86 *context )
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EMS_record->mapping[physical_page].logical_page = 0;
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}
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AH_reg(context) = 0; /* status: ok */
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return 0; /* status: ok */
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}
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/**********************************************************************
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* EMS_map_multiple
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*
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* Map multiple logical pages into physical pages.
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*/
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static void EMS_map_multiple( CONTEXT86 *context )
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{
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WORD *ptr = PTR_REAL_TO_LIN(context->SegDs, SI_reg(context));
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BYTE status = 0;
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int i;
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for(i=0; i<CX_reg(context) && !status; i++, ptr += 2)
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switch(AL_reg(context)) {
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case 0x00:
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status = EMS_map( ptr[1],
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DX_reg(context), ptr[0] );
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break;
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case 0x01:
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status = EMS_map( (ptr[1] - EMS_record->frame_selector) >> 10,
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DX_reg(context), ptr[0] );
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break;
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default:
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status = 0x8f; /* status: undefined subfunction */
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}
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AH_reg(context) = status;
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}
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/**********************************************************************
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@ -237,6 +278,48 @@ static void EMS_free( CONTEXT86 *context )
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AH_reg(context) = 0; /* status: ok */
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}
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/**********************************************************************
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* EMS_save_context
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*
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* Save physical page mappings into handle specific save area.
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*/
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static void EMS_save_context( CONTEXT86 *context )
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{
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WORD h = DX_reg(context);
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int i;
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for(i=0; i<4; i++) {
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EMS_record->mapping_save_area[h][i].hindex = EMS_record->mapping[i].hindex;
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EMS_record->mapping_save_area[h][i].logical_page = EMS_record->mapping[i].logical_page;
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}
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AX_reg(context) = 0; /* status: ok */
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}
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/**********************************************************************
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* EMS_restore_context
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*
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* Restore physical page mappings from handle specific save area.
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*/
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static void EMS_restore_context( CONTEXT86 *context )
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{
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WORD handle = DX_reg(context);
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int i;
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for(i=0; i<4; i++) {
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int hindex = EMS_record->mapping_save_area[handle][i].hindex;
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int logical_page = EMS_record->mapping_save_area[handle][i].logical_page;
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if(EMS_map( i, hindex, logical_page )) {
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AX_reg(context) = 0x8e; /* status: restore of mapping context failed */
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return;
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}
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}
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AX_reg(context) = 0; /* status: ok */
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}
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/**********************************************************************
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* DOSVM_Int67Handler
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*
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@ -273,7 +356,7 @@ void WINAPI DOSVM_Int67Handler( CONTEXT86 *context )
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case 0x44: /* EMS - MAP MEMORY */
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EMS_init();
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EMS_map(context);
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AH_reg(context) = EMS_map( AL_reg(context), DX_reg(context), BX_reg(context) );
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break;
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case 0x45: /* EMS - RELEASE HANDLE AND MEMORY */
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@ -287,8 +370,13 @@ void WINAPI DOSVM_Int67Handler( CONTEXT86 *context )
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break;
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case 0x47: /* EMS - SAVE MAPPING CONTEXT */
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EMS_init();
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EMS_save_context(context);
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break;
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case 0x48: /* EMS - RESTORE MAPPING CONTEXT */
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INT_BARF(context,0x67);
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EMS_init();
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EMS_restore_context(context);
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break;
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case 0x49: /* EMS - reserved - GET I/O PORT ADDRESSES */
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@ -305,7 +393,14 @@ void WINAPI DOSVM_Int67Handler( CONTEXT86 *context )
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case 0x4d: /* EMS - GET PAGES FOR ALL HANDLES */
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case 0x4e: /* EMS - GET OR SET PAGE MAP */
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case 0x4f: /* EMS 4.0 - GET/SET PARTIAL PAGE MAP */
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INT_BARF(context,0x67);
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break;
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case 0x50: /* EMS 4.0 - MAP/UNMAP MULTIPLE HANDLE PAGES */
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EMS_init();
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EMS_map_multiple(context);
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break;
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case 0x51: /* EMS 4.0 - REALLOCATE PAGES */
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case 0x52: /* EMS 4.0 - GET/SET HANDLE ATTRIBUTES */
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INT_BARF(context,0x67);
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@ -321,7 +416,22 @@ void WINAPI DOSVM_Int67Handler( CONTEXT86 *context )
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case 0x56: /* EMS 4.0 - ALTER PAGE MAP AND CALL */
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case 0x57: /* EMS 4.0 - MOVE/EXCHANGE MEMORY REGION */
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case 0x58: /* EMS 4.0 - GET MAPPABLE PHYSICAL ADDRESS ARRAY */
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INT_BARF(context,0x67);
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break;
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case 0x59: /* EMS 4.0 - GET EXPANDED MEMORY HARDWARE INFORMATION */
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if(AL_reg(context) == 0x01) {
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EMS_init();
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/* unallocated raw pages */
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BX_reg(context) = EMS_MAX_PAGES - EMS_record->used_pages;
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/* total number raw pages */
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DX_reg(context) = EMS_MAX_PAGES;
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/* status: ok */
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AH_reg(context) = 0;
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} else
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INT_BARF(context,0x67);
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break;
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case 0x5a: /* EMS 4.0 - ALLOCATE STANDARD/RAW PAGES */
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case 0x5b: /* EMS 4.0 - ALTERNATE MAP REGISTER SET */
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case 0x5c: /* EMS 4.0 - PREPARE EXPANDED MEMORY HARDWARE FOR WARM BOOT */
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