forked from Archive/PX4-Autopilot
Verify redesigned Z80 build on native Windows
git-svn-id: http://svn.code.sf.net/p/nuttx/code/trunk@5417 42af7a65-404d-4744-a932-0658087f49c3
This commit is contained in:
patacongo
parent
cb393b2757
commit
10bda33ba3
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@ -40,7 +40,6 @@ CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(TOPDIR)/sched
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CPPFLAGS += -D__ASSEMBLY__
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# Files and directories
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# There should be one head source (.asm file)
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HEAD_OBJ = $(HEAD_ASRC:$(ASMEXT)=$(OBJEXT))
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@ -87,7 +86,7 @@ $(AOBJS) $(HEAD_OBJ): %$(OBJEXT): %$(ASMEXT)
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$(COBJS): %$(OBJEXT): %.c
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$(call COMPILE, $<, $@)
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# This is a kludge to work around some conflicting symbols in libsdcc.lib
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# This is a kludge to work around some conflicting symbols in the SDCC libraries
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$(TOPDIR)/lib/$(SDCCLIB): $(SDCC_LIBDIR)/$(SDCCLIB)
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$(Q) cp $(SDCC_LIBDIR)/$(SDCCLIB) $(TOPDIR)/lib/$(SDCCLIB)
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@ -123,8 +122,8 @@ $(TOPDIR)/lib/$(SDCCLIB): $(SDCC_LIBDIR)/$(SDCCLIB)
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# IDLE thread stack
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asm_mem.h:
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@echo " CONFIG_STACK_END == ($(CONFIG_DRAM_SIZE) - 1)" >> asm_mem.h
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@echo " CONFIG_STACK_BASE == (CONFIG_STACK_END - $(CONFIG_IDLETHREAD_STACKSIZE))" >> asm_mem.h
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@echo " CONFIG_STACK_END == ($(CONFIG_DRAM_SIZE) - 1)" >> asm_mem.h
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@echo " CONFIG_STACK_BASE == (CONFIG_STACK_END - $(CONFIG_IDLETHREAD_STACKSIZE))" >> asm_mem.h
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# Combine all objects in this directory into a library
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@ -139,6 +138,7 @@ board/libboard$(LIBEXT):
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# This target builds the final executable
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nuttx.lnk:
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@echo "LD: nuttx.lnk"
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@echo "--" >nuttx.lnk # Non-interactive
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@echo "-k $(BOARDDIR)" >>nuttx.lnk # Path to board library
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@echo "-k $(TOPDIR)/lib" >>nuttx.lnk # Path to top-level lib directory
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@ -157,18 +157,6 @@ ifneq ($(CONFIG_LINKER_DATA_AREA),)
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else
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@echo "-b _DATA=0x8000" >>nuttx.lnk # Start of _DATA area
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endif
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ifneq ($(CONFIG_LINKER_START_AREA),)
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@echo "-b START=$(CONFIG_LINKER_START_AREA)" >>nuttx.lnk # Start of START area
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endif
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ifneq ($(CONFIG_LINKER_CODE_AREA),)
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@echo "-b _CODE=$(CONFIG_LINKER_CODE_AREA)" >>nuttx.lnk # Start of _CODE area
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else
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@echo "-b _CODE=256" >>nuttx.lnk # Start of _CODE area
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endif
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ifneq ($(CONFIG_LINKER_DATA_AREA),)
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@echo "-b _CODE=$(CONFIG_LINKER_DATA_AREA)" >>nuttx.lnk
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endif
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@echo "-i" >>nuttx.lnk # Intel hex format
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@echo "-x" >>nuttx.lnk # Hexadecimal
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@echo "-m" >>nuttx.lnk # Generate a map file
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@ -145,18 +145,15 @@ nuttx.lnk:
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@echo -l libboard$(LIBEXT)>>nuttx.lnk
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$(Q) for %%G in ($(LINKLIBS)) do ( echo -l $(TOPDIR)\lib\%%G>> nuttx.lnk )
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@echo -l $(SDCCLIB)>>nuttx.lnk
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ifneq ($(CONFIG_LINKER_START_AREA),)
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@echo -b START=$(CONFIG_LINKER_START_AREA)>>nuttx.lnk
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else
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@echo -b START=0>>nuttx.lnk
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endif
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ifneq ($(CONFIG_LINKER_CODE_AREA),)
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@echo -b _CODE=$(CONFIG_LINKER_CODE_AREA)>>nuttx.lnk
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else
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@echo -b _CODE=256>>nuttx.lnk
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@echo -b _CODE=0x0200>>nuttx.lnk
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endif
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ifneq ($(CONFIG_LINKER_DATA_AREA),)
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@echo -b _CODE=$(CONFIG_LINKER_DATA_AREA)>>nuttx.lnk
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else
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@echo -b _DATA=0x8000>>nuttx.lnk
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endif
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@echo -i>>nuttx.lnk
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@echo -x>>nuttx.lnk
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@ -1,7 +1,7 @@
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;**************************************************************************
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; arch/z80/src/z80/z80_head.asm
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;
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; Copyright (C) 2007-2009 Gregory Nutt. All rights reserved.
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; Copyright (C) 2007-2009, 2012 Gregory Nutt. All rights reserved.
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; Author: Gregory Nutt <gnutt@nuttx.org>
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;
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; Redistribution and use in source and binary forms, with or without
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@ -92,70 +92,70 @@
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; Save AF on the stack, set the interrupt number and jump to the
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; common reset handling logic.
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; Offset 8: Return PC is already on the stack
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push af ; Offset 7: AF (retaining flags)
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ld a, #1 ; 1 = Z80_RST1
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jr _up_rstcommon ; Remaining RST handling is common
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; Offset 8: Return PC is already on the stack
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push af ; Offset 7: AF (retaining flags)
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ld a, #1 ; 1 = Z80_RST1
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jr _up_rstcommon ; Remaining RST handling is common
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.org 0x0010 ; RST 2
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; Save AF on the stack, set the interrupt number and jump to the
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; common reset handling logic.
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; Offset 8: Return PC is already on the stack
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push af ; Offset 7: AF (retaining flags)
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ld a, #2 ; 2 = Z80_RST2
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jr _up_rstcommon ; Remaining RST handling is common
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; Offset 8: Return PC is already on the stack
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push af ; Offset 7: AF (retaining flags)
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ld a, #2 ; 2 = Z80_RST2
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jr _up_rstcommon ; Remaining RST handling is common
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.org 0x0018 ; RST 3
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; Save AF on the stack, set the interrupt number and jump to the
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; common reset handling logic.
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; Offset 8: Return PC is already on the stack
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push af ; Offset 7: AF (retaining flags)
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ld a, #3 ; 1 = Z80_RST3
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jr _up_rstcommon ; Remaining RST handling is common
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; Offset 8: Return PC is already on the stack
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push af ; Offset 7: AF (retaining flags)
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ld a, #3 ; 1 = Z80_RST3
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jr _up_rstcommon ; Remaining RST handling is common
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.org 0x0020 ; RST 4
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; Save AF on the stack, set the interrupt number and jump to the
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; common reset handling logic.
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; Offset 8: Return PC is already on the stack
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push af ; Offset 7: AF (retaining flags)
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ld a, #4 ; 1 = Z80_RST4
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jr _up_rstcommon ; Remaining RST handling is common
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; Offset 8: Return PC is already on the stack
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push af ; Offset 7: AF (retaining flags)
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ld a, #4 ; 1 = Z80_RST4
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jr _up_rstcommon ; Remaining RST handling is common
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.org 0x0028 ; RST 5
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; Save AF on the stack, set the interrupt number and jump to the
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; common reset handling logic.
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; Offset 8: Return PC is already on the stack
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push af ; Offset 7: AF (retaining flags)
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ld a, #5 ; 1 = Z80_RST5
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jr _up_rstcommon ; Remaining RST handling is common
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; Offset 8: Return PC is already on the stack
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push af ; Offset 7: AF (retaining flags)
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ld a, #5 ; 1 = Z80_RST5
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jr _up_rstcommon ; Remaining RST handling is common
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.org 0x0030 ; RST 6
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; Save AF on the stack, set the interrupt number and jump to the
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; common reset handling logic.
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; Offset 8: Return PC is already on the stack
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push af ; Offset 7: AF (retaining flags)
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ld a, #6 ; 1 = Z80_RST6
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jr _up_rstcommon ; Remaining RST handling is common
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; Offset 8: Return PC is already on the stack
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push af ; Offset 7: AF (retaining flags)
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ld a, #6 ; 1 = Z80_RST6
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jr _up_rstcommon ; Remaining RST handling is common
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.org 0x0038 ; Int mode 1 / RST 7
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; Save AF on the stack, set the interrupt number and jump to the
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; common reset handling logic.
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; Offset 8: Return PC is already on the stack
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push af ; Offset 7: AF (retaining flags)
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ld a, #7 ; 7 = Z80_RST7
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jr _up_rstcommon ; Remaining RST handling is common
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; Offset 8: Return PC is already on the stack
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push af ; Offset 7: AF (retaining flags)
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ld a, #7 ; 7 = Z80_RST7
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jr _up_rstcommon ; Remaining RST handling is common
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;**************************************************************************
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; NMI interrupt handler
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;**************************************************************************
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.org 0x0066
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.org 0x0066
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retn
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;**************************************************************************
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@ -166,7 +166,7 @@ _up_reset:
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; Set up the stack pointer at the location determined the Makefile
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; and stored in asm_mem.h
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ld SP, #CONFIG_STACK_END ; Set stack pointer
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ld SP, #CONFIG_STACK_END ; Set stack pointer
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; Performed initialization unique to the SDCC toolchain
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@ -179,8 +179,8 @@ _up_reset:
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; NuttX will never return, but just in case...
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_up_halt::
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halt ; We should never get here
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jp _up_halt
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halt ; We should never get here
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jp _up_halt
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;**************************************************************************
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; Common Interrupt handler
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@ -195,98 +195,98 @@ _up_rstcommon::
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;
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; IRQ number is in A
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push hl ; Offset 6: HL
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ld hl, #(3*2) ; HL is the value of the stack pointer before
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add hl, sp ; the interrupt occurred
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push hl ; Offset 5: Stack pointer
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push iy ; Offset 4: IY
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push ix ; Offset 3: IX
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push de ; Offset 2: DE
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push bc ; Offset 1: BC
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push hl ; Offset 6: HL
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ld hl, #(3*2) ; HL is the value of the stack pointer before
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add hl, sp ; the interrupt occurred
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push hl ; Offset 5: Stack pointer
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push iy ; Offset 4: IY
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push ix ; Offset 3: IX
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push de ; Offset 2: DE
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push bc ; Offset 1: BC
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ld b, a ; Save the reset number in B
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ld a, i ; Parity bit holds interrupt state
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push af ; Offset 0: I with interrupt state in parity
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ld b, a ; Save the reset number in B
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ld a, i ; Parity bit holds interrupt state
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push af ; Offset 0: I with interrupt state in parity
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di
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; Call the interrupt decode logic. SP points to the beggining of the reg structure
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; Call the interrupt decode logic. SP points to the beginning of the reg structure
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ld hl, #0 ; Argument #2 is the beginning of the reg structure
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add hl, sp ;
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push hl ; Place argument #2 at the top of stack
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push bc ; Argument #1 is the Reset number
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inc sp ; (make byte sized)
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ld hl, #0 ; Argument #2 is the beginning of the reg structure
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add hl, sp ;
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push hl ; Place argument #2 at the top of stack
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push bc ; Argument #1 is the Reset number
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inc sp ; (make byte sized)
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call _up_doirq ; Decode the IRQ
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; On return, HL points to the beginning of the reg structure to restore
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; Note that (1) the arguments pushed on the stack are not popped, and (2) the
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; original stack pointer is lost. In the normal case (no context switch),
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; HL will contain the value of the SP before the arguments wer pushed.
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; HL will contain the value of the SP before the arguments were pushed.
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ld sp, hl ; Use the new stack pointer
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ld sp, hl ; Use the new stack pointer
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; Restore registers. HL points to the beginning of the reg structure to restore
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ex af, af' ; Select alternate AF
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pop af ; Offset 0: AF' = I with interrupt state in carry
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ex af, af' ; Restore original AF
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pop bc ; Offset 1: BC
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pop de ; Offset 2: DE
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pop ix ; Offset 3: IX
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pop iy ; Offset 4: IY
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exx ; Use alternate BC/DE/HL
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ld hl, #-2 ; Offset of SP to account for ret addr on stack
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pop de ; Offset 5: HL' = Stack pointer after return
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add hl, de ; HL = Stack pointer value before return
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exx ; Restore original BC/DE/HL
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pop hl ; Offset 6: HL
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pop af ; Offset 7: AF
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ex af, af' ; Select alternate AF
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pop af ; Offset 0: AF' = I with interrupt state in carry
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ex af, af' ; Restore original AF
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pop bc ; Offset 1: BC
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pop de ; Offset 2: DE
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pop ix ; Offset 3: IX
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pop iy ; Offset 4: IY
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exx ; Use alternate BC/DE/HL
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ld hl, #-2 ; Offset of SP to account for ret addr on stack
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pop de ; Offset 5: HL' = Stack pointer after return
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add hl, de ; HL = Stack pointer value before return
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exx ; Restore original BC/DE/HL
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pop hl ; Offset 6: HL
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pop af ; Offset 7: AF
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; Restore the stack pointer
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exx ; Use alternate BC/DE/HL
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ld sp, hl ; Set SP = saved stack pointer value before return
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exx ; Restore original BC/DE/HL
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exx ; Use alternate BC/DE/HL
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ld sp, hl ; Set SP = saved stack pointer value before return
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exx ; Restore original BC/DE/HL
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; Restore interrupt state
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ex af, af' ; Recover interrupt state
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jp po, nointenable ; Odd parity, IFF2=0, means disabled
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ex af, af' ; Restore AF (before enabling interrupts)
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ei ; yes
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ex af, af' ; Recover interrupt state
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jp po, nointenable ; Odd parity, IFF2=0, means disabled
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ex af, af' ; Restore AF (before enabling interrupts)
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ei ; yes
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reti
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nointenable::
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ex af, af' ; Restore AF
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ex af, af' ; Restore AF
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reti
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;**************************************************************************
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; Ordering of segments for the linker (SDCC only)
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;**************************************************************************
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.area _HOME
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.area _CODE
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.area _HOME
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.area _CODE
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.area _INITIALIZER
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.area _GSINIT
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.area _GSFINAL
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.area _GSINIT
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.area _GSFINAL
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.area _DATA
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.area _DATA
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.area _INITIALIZED
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.area _BSEG
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.area _BSS
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.area _HEAP
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.area _BSS
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.area _HEAP
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;**************************************************************************
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; Global data initialization logic (SDCC only)
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;**************************************************************************
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.area _GSINIT
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.area _GSINIT
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gsinit::
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ld bc, #l__INITIALIZER
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ld a, b
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or a, c
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jr Z, gsinit_next
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ld de, #s__INITIALIZED
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ld hl, #s__INITIALIZER
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ld bc, #l__INITIALIZER
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ld a, b
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or a, c
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jr Z, gsinit_next
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ld de, #s__INITIALIZED
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ld hl, #s__INITIALIZER
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ldir
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gsinit_next:
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@ -300,5 +300,5 @@ gsinit_next:
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.area _CODE
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_g_heapbase::
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.dw #s__HEAP
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.dw #s__HEAP
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@ -1,7 +1,7 @@
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;**************************************************************************
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; arch/z80/src/z80/z80_rom.asm
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;
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; Copyright (C) 2008-2009 Gregory Nutt. All rights reserved.
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; Copyright (C) 2008-2009, 2012 Gregory Nutt. All rights reserved.
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; Author: Gregory Nutt <gnutt@nuttx.org>
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;
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; Redistribution and use in source and binary forms, with or without
|
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|
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@ -42,7 +42,7 @@
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; Register save area layout
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XCPT_I == 0 ; Offset 0: Saved I w/interrupt state in parity
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XCPT_I == 0 ; Offset 0: Saved I w/interrupt state in carry
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XCPT_BC == 2 ; Offset 1: Saved BC register
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XCPT_DE == 4 ; Offset 2: Saved DE register
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XCPT_IX == 6 ; Offset 3: Saved IX register
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@ -71,7 +71,7 @@ _up_reset:
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; Set up the stack pointer at the location determined the Makefile
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; and stored in asm_mem.h
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ld SP, #CONFIG_STACK_END ; Set stack pointer
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ld SP, #CONFIG_STACK_END ; Set stack pointer
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; Performed initialization unique to the SDCC toolchain
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@ -79,9 +79,9 @@ _up_reset:
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; Copy the reset vectors
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ld hl, #_up_rstvectors ; code for RAM
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ld de, #0x4000 ; move it here
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ld bc, #3*7 ; 7 vectors / 3 bytes each
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ld hl, #_up_rstvectors ; code for RAM
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ld de, #0x4000 ; move it here
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ld bc, #3*7 ; 7 vectors / 3 bytes each
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ldir
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; Then start NuttX
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@ -91,19 +91,19 @@ _up_reset:
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; NuttX will never return, but just in case...
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_up_halt::
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halt ; We should never get here
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jp _up_halt
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halt ; We should never get here
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jp _up_halt
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; Data to copy to address 0x4000
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_up_rstvectors:
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jp _up_rst1 ; 0x4000 : RST 1
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jp _up_rst2 ; 0x4003 : RST 2
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jp _up_rst3 ; 0x4006 : RST 3
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jp _up_rst4 ; 0x4009 : RST 4
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jp _up_rst5 ; 0x400c : RST 5
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jp _up_rst6 ; 0x400f : RST 6
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jp _up_rst7 ; 0x4012 : RST 7
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jp _up_rst1 ; 0x4000 : RST 1
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jp _up_rst2 ; 0x4003 : RST 2
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jp _up_rst3 ; 0x4006 : RST 3
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jp _up_rst4 ; 0x4009 : RST 4
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jp _up_rst5 ; 0x400c : RST 5
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jp _up_rst6 ; 0x400f : RST 6
|
||||
jp _up_rst7 ; 0x4012 : RST 7
|
||||
|
||||
;**************************************************************************
|
||||
; Other reset handlers
|
||||
|
|
@ -119,61 +119,61 @@ _up_rstvectors:
|
|||
;
|
||||
;**************************************************************************
|
||||
|
||||
_up_rst1: ; RST 1
|
||||
_up_rst1: ; RST 1
|
||||
; Save AF on the stack, set the interrupt number and jump to the
|
||||
; common reset handling logic.
|
||||
; Offset 8: Return PC is already on the stack
|
||||
push af ; Offset 7: AF (retaining flags)
|
||||
ld a, #1 ; 1 = Z80_RST1
|
||||
jr _up_rstcommon ; Remaining RST handling is common
|
||||
; Offset 8: Return PC is already on the stack
|
||||
push af ; Offset 7: AF (retaining flags)
|
||||
ld a, #1 ; 1 = Z80_RST1
|
||||
jr _up_rstcommon ; Remaining RST handling is common
|
||||
|
||||
_up_rst2: ; RST 2
|
||||
_up_rst2: ; RST 2
|
||||
; Save AF on the stack, set the interrupt number and jump to the
|
||||
; common reset handling logic.
|
||||
; Offset 8: Return PC is already on the stack
|
||||
push af ; Offset 7: AF (retaining flags)
|
||||
ld a, #2 ; 2 = Z80_RST2
|
||||
jr _up_rstcommon ; Remaining RST handling is common
|
||||
; Offset 8: Return PC is already on the stack
|
||||
push af ; Offset 7: AF (retaining flags)
|
||||
ld a, #2 ; 2 = Z80_RST2
|
||||
jr _up_rstcommon ; Remaining RST handling is common
|
||||
|
||||
_up_rst3: ; RST 3
|
||||
_up_rst3: ; RST 3
|
||||
; Save AF on the stack, set the interrupt number and jump to the
|
||||
; common reset handling logic.
|
||||
; Offset 8: Return PC is already on the stack
|
||||
push af ; Offset 7: AF (retaining flags)
|
||||
ld a, #3 ; 1 = Z80_RST3
|
||||
jr _up_rstcommon ; Remaining RST handling is common
|
||||
; Offset 8: Return PC is already on the stack
|
||||
push af ; Offset 7: AF (retaining flags)
|
||||
ld a, #3 ; 1 = Z80_RST3
|
||||
jr _up_rstcommon ; Remaining RST handling is common
|
||||
|
||||
_up_rst4: ; RST 4
|
||||
_up_rst4: ; RST 4
|
||||
; Save AF on the stack, set the interrupt number and jump to the
|
||||
; common reset handling logic.
|
||||
; Offset 8: Return PC is already on the stack
|
||||
push af ; Offset 7: AF (retaining flags)
|
||||
ld a, #4 ; 1 = Z80_RST4
|
||||
jr _up_rstcommon ; Remaining RST handling is common
|
||||
; Offset 8: Return PC is already on the stack
|
||||
push af ; Offset 7: AF (retaining flags)
|
||||
ld a, #4 ; 1 = Z80_RST4
|
||||
jr _up_rstcommon ; Remaining RST handling is common
|
||||
|
||||
_up_rst5: ; RST 5
|
||||
_up_rst5: ; RST 5
|
||||
; Save AF on the stack, set the interrupt number and jump to the
|
||||
; common reset handling logic.
|
||||
; Offset 8: Return PC is already on the stack
|
||||
push af ; Offset 7: AF (retaining flags)
|
||||
ld a, #5 ; 1 = Z80_RST5
|
||||
jr _up_rstcommon ; Remaining RST handling is common
|
||||
; Offset 8: Return PC is already on the stack
|
||||
push af ; Offset 7: AF (retaining flags)
|
||||
ld a, #5 ; 1 = Z80_RST5
|
||||
jr _up_rstcommon ; Remaining RST handling is common
|
||||
|
||||
_up_rst6: ; RST 6
|
||||
_up_rst6: ; RST 6
|
||||
; Save AF on the stack, set the interrupt number and jump to the
|
||||
; common reset handling logic.
|
||||
; Offset 8: Return PC is already on the stack
|
||||
push af ; Offset 7: AF (retaining flags)
|
||||
ld a, #6 ; 1 = Z80_RST6
|
||||
jr _up_rstcommon ; Remaining RST handling is common
|
||||
; Offset 8: Return PC is already on the stack
|
||||
push af ; Offset 7: AF (retaining flags)
|
||||
ld a, #6 ; 1 = Z80_RST6
|
||||
jr _up_rstcommon ; Remaining RST handling is common
|
||||
|
||||
_up_rst7: ; RST 7
|
||||
_up_rst7: ; RST 7
|
||||
; Save AF on the stack, set the interrupt number and jump to the
|
||||
; common reset handling logic.
|
||||
; Offset 8: Return PC is already on the stack
|
||||
push af ; Offset 7: AF (retaining flags)
|
||||
ld a, #7 ; 7 = Z80_RST7
|
||||
jr _up_rstcommon ; Remaining RST handling is common
|
||||
; Offset 8: Return PC is already on the stack
|
||||
push af ; Offset 7: AF (retaining flags)
|
||||
ld a, #7 ; 7 = Z80_RST7
|
||||
jr _up_rstcommon ; Remaining RST handling is common
|
||||
|
||||
;**************************************************************************
|
||||
; Common Interrupt handler
|
||||
|
|
@ -188,27 +188,27 @@ _up_rstcommon:
|
|||
;
|
||||
; IRQ number is in A
|
||||
|
||||
push hl ; Offset 6: HL
|
||||
ld hl, #(3*2) ; HL is the value of the stack pointer before
|
||||
add hl, sp ; the interrupt occurred
|
||||
push hl ; Offset 5: Stack pointer
|
||||
push iy ; Offset 4: IY
|
||||
push ix ; Offset 3: IX
|
||||
push de ; Offset 2: DE
|
||||
push bc ; Offset 1: BC
|
||||
push hl ; Offset 6: HL
|
||||
ld hl, #(3*2) ; HL is the value of the stack pointer before
|
||||
add hl, sp ; the interrupt occurred
|
||||
push hl ; Offset 5: Stack pointer
|
||||
push iy ; Offset 4: IY
|
||||
push ix ; Offset 3: IX
|
||||
push de ; Offset 2: DE
|
||||
push bc ; Offset 1: BC
|
||||
|
||||
ld b, a ; Save the reset number in B
|
||||
ld a, i ; Parity bit holds interrupt state
|
||||
push af ; Offset 0: I with interrupt state in parity
|
||||
ld b, a ; Save the reset number in B
|
||||
ld a, i ; Parity bit holds interrupt state
|
||||
push af ; Offset 0: I with interrupt state in parity
|
||||
di
|
||||
|
||||
; Call the interrupt decode logic. SP points to the beginning of the reg structure
|
||||
|
||||
ld hl, #0 ; Argument #2 is the beginning of the reg structure
|
||||
add hl, sp ;
|
||||
push hl ; Place argument #2 at the top of stack
|
||||
push bc ; Argument #1 is the Reset number
|
||||
inc sp ; (make byte sized)
|
||||
ld hl, #0 ; Argument #2 is the beginning of the reg structure
|
||||
add hl, sp ;
|
||||
push hl ; Place argument #2 at the top of stack
|
||||
push bc ; Argument #1 is the Reset number
|
||||
inc sp ; (make byte sized)
|
||||
call _up_doirq ; Decode the IRQ
|
||||
|
||||
; On return, HL points to the beginning of the reg structure to restore
|
||||
|
|
@ -216,61 +216,82 @@ _up_rstcommon:
|
|||
; original stack pointer is lost. In the normal case (no context switch),
|
||||
; HL will contain the value of the SP before the arguments were pushed.
|
||||
|
||||
ld sp, hl ; Use the new stack pointer
|
||||
ld sp, hl ; Use the new stack pointer
|
||||
|
||||
; Restore registers. HL points to the beginning of the reg structure to restore
|
||||
|
||||
ex af, af' ; Select alternate AF
|
||||
pop af ; Offset 0: AF' = I with interrupt state in parity
|
||||
ex af, af' ; Restore original AF
|
||||
pop bc ; Offset 1: BC
|
||||
pop de ; Offset 2: DE
|
||||
pop ix ; Offset 3: IX
|
||||
pop iy ; Offset 4: IY
|
||||
exx ; Use alternate BC/DE/HL
|
||||
ld hl, #-2 ; Offset of SP to account for ret addr on stack
|
||||
pop de ; Offset 5: HL' = Stack pointer after return
|
||||
add hl, de ; HL = Stack pointer value before return
|
||||
exx ; Restore original BC/DE/HL
|
||||
pop hl ; Offset 6: HL
|
||||
pop af ; Offset 7: AF
|
||||
ex af, af' ; Select alternate AF
|
||||
pop af ; Offset 0: AF' = I with interrupt state in carry
|
||||
ex af, af' ; Restore original AF
|
||||
pop bc ; Offset 1: BC
|
||||
pop de ; Offset 2: DE
|
||||
pop ix ; Offset 3: IX
|
||||
pop iy ; Offset 4: IY
|
||||
exx ; Use alternate BC/DE/HL
|
||||
ld hl, #-2 ; Offset of SP to account for ret addr on stack
|
||||
pop de ; Offset 5: HL' = Stack pointer after return
|
||||
add hl, de ; HL = Stack pointer value before return
|
||||
exx ; Restore original BC/DE/HL
|
||||
pop hl ; Offset 6: HL
|
||||
pop af ; Offset 7: AF
|
||||
|
||||
; Restore the stack pointer
|
||||
|
||||
exx ; Use alternate BC/DE/HL
|
||||
ld sp, hl ; Set SP = saved stack pointer value before return
|
||||
exx ; Restore original BC/DE/HL
|
||||
exx ; Use alternate BC/DE/HL
|
||||
ld sp, hl ; Set SP = saved stack pointer value before return
|
||||
exx ; Restore original BC/DE/HL
|
||||
|
||||
; Restore interrupt state
|
||||
|
||||
ex af, af' ; Recover interrupt state
|
||||
jp po, nointenable ; Odd parity, IFF2=0, means disabled
|
||||
ex af, af' ; Restore AF (before enabling interrupts)
|
||||
ei ; yes
|
||||
ex af, af' ; Recover interrupt state
|
||||
jp po, nointenable ; Odd parity, IFF2=0, means disabled
|
||||
ex af, af' ; Restore AF (before enabling interrupts)
|
||||
ei ; yes
|
||||
reti
|
||||
nointenable::
|
||||
ex af, af' ; Restore AF
|
||||
ex af, af' ; Restore AF
|
||||
reti
|
||||
|
||||
;**************************************************************************
|
||||
; Ordering of segments for the linker (SDCC only)
|
||||
;**************************************************************************
|
||||
|
||||
.area _HOME
|
||||
.area _CODE
|
||||
.area _GSINIT
|
||||
.area _GSFINAL
|
||||
.area _HOME
|
||||
.area _CODE
|
||||
.area _INITIALIZER
|
||||
.area _GSINIT
|
||||
.area _GSFINAL
|
||||
|
||||
.area _DATA
|
||||
.area _BSS
|
||||
.area _HEAP
|
||||
.area _DATA
|
||||
.area _INITIALIZED
|
||||
.area _BSEG
|
||||
.area _BSS
|
||||
.area _HEAP
|
||||
|
||||
;**************************************************************************
|
||||
; Global data initialization logic (SDCC only)
|
||||
;**************************************************************************
|
||||
|
||||
.area _GSINIT
|
||||
.area _GSINIT
|
||||
gsinit::
|
||||
ld bc, #l__INITIALIZER
|
||||
ld a, b
|
||||
or a, c
|
||||
jr Z, gsinit_next
|
||||
ld de, #s__INITIALIZED
|
||||
ld hl, #s__INITIALIZER
|
||||
ldir
|
||||
gsinit_next:
|
||||
|
||||
.area _GSFINAL
|
||||
ret
|
||||
|
||||
;**************************************************************************
|
||||
; The start of the heap (SDCC only). Note that is actually resides in
|
||||
; the _CODE area (which may be FLASH or ROM)
|
||||
;**************************************************************************
|
||||
|
||||
.area _CODE
|
||||
_g_heapbase::
|
||||
.dw #s__HEAP
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue