Add logic to init global data on bootup
git-svn-id: https://nuttx.svn.sourceforge.net/svnroot/nuttx/trunk@473 7fd9a85b-ad96-42d3-883c-3090e2eb8679
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patacongo
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@ -17,7 +17,7 @@ NuttX TODO List (Last updated December 13, 2007)
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(0) ARM/C5471 (arch/arm/src/c5471/)
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(1) ARM/DM320 (arch/arm/src/dm320/)
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(2) ARM/LPC214x (arch/arm/src/lpc214x/)
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(3) pjrc-8052 / MCS51 (arch/pjrc-8051/)
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(4) pjrc-8052 / MCS51 (arch/pjrc-8051/)
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(0) z80 (arch/z80/)
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o Task/Scheduler (sched/)
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@ -306,6 +306,11 @@ o pjrc-8052 / MCS51 (arch/pjrc-8051/)
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Status: Open
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Priority: Medium
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Description Global data is not being initialized. Logic like that of SDCCs
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crt0*.s needs to be incorporated into the system boot logic
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Status: Open
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Priority: Low -- only because there as so many other issues with 8051
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o z80 (arch/z80)
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^^^^^^^^^^^^^^^
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@ -126,12 +126,8 @@ $(COBJS): %$(OBJEXT): %.c
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$(SDCCLIBDIR)/myz80.lib: $(SDCCLIBDIR)/$(SDCCLIB)
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@cat $(SDCCLIBDIR)/$(SDCCLIB) | \
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grep -v calloc | grep -v malloc | grep -v realloc | \
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grep -v free | grep -v getenv | grep -v vprintf | \
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grep -v sprintf | grep -v _strncpy | grep -v _strchr | \
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grep -v _strlen | grep -v _strcmp | grep -v _strcpy | \
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grep -v _memcmp | grep -v _memcpy | grep -v _memset | \
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grep -v crt0 \
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grep -v alloc | grep -v free | grep -v printf | \
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grep -v _str | grep -v _mem | grep -v crt0\.o \
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> myz80.lib
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@sudo mv -f myz80.lib $(SDCCLIBDIR)/myz80.lib
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@ -149,6 +145,13 @@ up_mem.h:
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@echo "#endif /* __ARCH_MEM_H */" >>up_mem.h
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asm_mem.h:
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@echo " UP_COMPILER_OTHER == 0" > asm_mem.h
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@echo " UP_COMPILER_SDCC == 1" >> asm_mem.h
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ifeq ($(CC),sdcc)
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@echo " UP_COMPILER == 1" >> asm_mem.h
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else
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@echo " UP_COMPILER == 0" >> asm_mem.h
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endif
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@echo " UP_STACK_END == ($(CONFIG_DRAM_SIZE) - 1)" >> asm_mem.h
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@echo " UP_STACK_BASE == (UP_STACK_END - $(CONFIG_PROC_STACK_SIZE))" >> asm_mem.h
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@echo " UP_HEAP1_END == (UP_STACK_END - $(CONFIG_PROC_STACK_SIZE) - 1)" >> asm_mem.h
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@ -170,7 +173,8 @@ board/libboard$(LIBEXT):
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# This target builds the final executable
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pass1.ihx: up_mem.h asm_mem.h $(SDCCLIBDIR)/myz80.lib $(HEAD_AOBJ) board/libboard$(LIBEXT)
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@echo "-k $(BOARDDIR)" >pass1.lnk # Path to board library
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@echo "--" >pass1.lnk # Non-interactive
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@echo "-k $(BOARDDIR)" >>pass1.lnk # Path to board library
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@echo "-k $(SDCCLIBDIR)" >>pass1.lnk # Path to SDCC z80 library
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@echo "-l libboard$(LIBEXT)" >>pass1.lnk # Name of board library
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@for LIB in $(LINKLIBS); do \
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@ -180,8 +184,9 @@ pass1.ihx: up_mem.h asm_mem.h $(SDCCLIBDIR)/myz80.lib $(HEAD_AOBJ) board/libboar
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@echo "-b START=0" >>pass1.lnk # Start of START area
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@echo "-b _CODE=256" >>pass1.lnk # Start of _CODE area
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@echo "-i" >>pass1.lnk # Intel hex format
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@echo "-m" >>pass1.lnk # Generate a map file
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@echo "-j" >>pass1.lnk # Generate a symbol file
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@echo "-x" >>pass1.lnk # Hexadecimal
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@echo "-m" >>pass1.lnk # Generate a map file
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@echo "-j" >>pass1.lnk # Generate a symbol file
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@echo "pass1.ihx" >>pass1.lnk # Path to head object
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@echo "$(HEAD_AOBJ)" >>pass1.lnk # Path to head object
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@echo "-e" >>pass1.lnk # End of script
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@ -192,7 +197,8 @@ pass1.ihx: up_mem.h asm_mem.h $(SDCCLIBDIR)/myz80.lib $(HEAD_AOBJ) board/libboar
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@$(MAKE) TOPDIR=$(TOPDIR) $(HEAD_AOBJ)
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nuttx.ihx: up_mem.h asm_mem.h $(SDCCLIBDIR)/myz80.lib $(HEAD_AOBJ) board/libboard$(LIBEXT)
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@echo "-k $(BOARDDIR)" >nuttx.lnk # Path to board library
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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 $(SDCCLIBDIR)" >>nuttx.lnk # Path to SDCC z80 library
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@echo "-l libboard$(LIBEXT)" >>nuttx.lnk # Name of board library
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@for LIB in $(LINKLIBS); do \
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@ -202,6 +208,7 @@ nuttx.ihx: up_mem.h asm_mem.h $(SDCCLIBDIR)/myz80.lib $(HEAD_AOBJ) board/libboar
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@echo "-b START=0" >>nuttx.lnk # Start of START area
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@echo "-b _CODE=256" >>nuttx.lnk # Start of _CODE area
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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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@echo "-j" >>nuttx.lnk # Generate a symbol file
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@echo "nuttx.ihx" >>nuttx.lnk # Path to head object
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@ -67,7 +67,7 @@
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; Reset entry point
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;**************************************************************************
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.area START (ABS)
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.area _HEADER (ABS)
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.org 0x0000
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di ; Disable interrupts
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@ -162,17 +162,31 @@
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; System start logic
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;**************************************************************************
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_up_reset:
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_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, #UP_STACK_END ; Set stack pointer
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jp _os_start ; jump to the OS entry point
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forever:
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jp forever
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; Performed initialization unique to the SDCC toolchain
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call gsinit ; Initialize the data section
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; Then start NuttX
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call _os_start ; jump to the OS entry point
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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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;**************************************************************************
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; Common Interrupt handler
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;**************************************************************************
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_up_rstcommon:
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_up_rstcommon::
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; Create a register frame. SP points to top of frame + 4, pushes
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; decrement the stack pointer. Already have
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;
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@ -241,10 +255,29 @@ _up_rstcommon:
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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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nointenable::
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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 _GSINIT
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.area _GSFINAL
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.area _DATA
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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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gsinit::
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.area _GSFINAL
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ret
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@ -49,6 +49,7 @@
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; up_restoreusercontext
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;**************************************************************************
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.area _CODE
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_up_restoreusercontext:
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; On entry, stack contains return address (not used), then address
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; of the register save structure
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@ -62,7 +62,7 @@
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; Name: up_saveusercontext
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;*************************************************************************
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; .area _CODE (ABS,OVR)
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.area _CODE
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_up_saveusercontext:
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; Set up a stack frame
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