Changeset 149 in xtideuniversalbios for trunk/Assembly_Library/Inc

Timestamp:

Apr 29, 2011, 6:58:11 PM (14 years ago)

Author:

Tomi Tilli

google:author:

aitotat

Message:

Changes to Assembly Library:

• Added pointer normalization functions

File:

• trunk/Assembly_Library/Inc/Registers.inc (modified) (1 diff)

trunk/Assembly_Library/Inc/Registers.inc

@@ -88 +88 @@
 
 ;--------------------------------------------------------------------
+; This macro must be the first thing to call on Interrupt Service Routine.
+; Extra words will be initialized to zero.
+;
+; SAVE_AND_GET_INTPACK_WITH_EXTRA_WORDS_TO_SSBP
+;   Parameters
+;       %1:     Number of extra words to reserve before INTPACK
+;   Returns:
+;       SS:BP:  Points to INTPACK
+;   Corrupts registers:
+;       Nothing
+;--------------------------------------------------------------------
+%macro SAVE_AND_GET_INTPACK_WITH_EXTRA_WORDS_TO_SSBP 1
+    ePUSHA
+    push    ds
+    push    es
+%ifdef USE_386
+    push    fs
+    push    gs
+%endif
+    xor     bp, bp
+    times %1 push bp        ; Initialize to zero
+    mov     bp, sp
+%endmacro
+
+;--------------------------------------------------------------------
+; This macro must be the last thing to call on Interrupt Service Routine.
+;
+; RESTORE_INTPACK_WITH_EXTRA_WORDS_FROM_SSBP
+;   Parameters
+;       %1:     Number of extra words in INTPACK
+;       SS:BP:  Ptr to INTPACK
+;   Returns:
+;       All Registers will be loaded from INTPACK
+;--------------------------------------------------------------------
+%macro RESTORE_INTPACK_WITH_EXTRA_WORDS_FROM_SSBP 1
+    add     sp, BYTE (%1)*2
+%ifdef USE_386
+    pop     gs
+    pop     fs
+%endif
+    pop     es
+    pop     ds
+    ePOPA
+    iret
+%endmacro
+
+
+;--------------------------------------------------------------------
 ; NORMALIZE_FAR_POINTER
 ;   Parameters: