From 022f03bbcde61c8d26ecfbe81d91ee36e1126f87 Mon Sep 17 00:00:00 2001 From: patacongo Date: Sat, 29 Dec 2007 01:05:26 +0000 Subject: [PATCH] Import of z80 target git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@455 42af7a65-404d-4744-a932-0658087f49c3 --- configs/z80sim/Make.defs | 83 +++++++ configs/z80sim/README.txt | 20 ++ configs/z80sim/defconfig | 289 +++++++++++++++++++++++++ configs/z80sim/include/README.txt | 1 + configs/z80sim/include/board.h | 51 +++++ configs/z80sim/setenv.sh | 45 ++++ configs/z80sim/src/Makefile | 79 +++++++ configs/z80sim/src/README.txt | 1 + configs/z80sim/src/z80_decodeirq.c | 119 ++++++++++ configs/z80sim/src/z80_irq.c | 110 ++++++++++ configs/z80sim/src/z80_serial.c | 334 +++++++++++++++++++++++++++++ configs/z80sim/src/z80_timerisr.c | 153 +++++++++++++ 12 files changed, 1285 insertions(+) create mode 100644 configs/z80sim/Make.defs create mode 100644 configs/z80sim/README.txt create mode 100644 configs/z80sim/defconfig create mode 100644 configs/z80sim/include/README.txt create mode 100644 configs/z80sim/include/board.h create mode 100755 configs/z80sim/setenv.sh create mode 100644 configs/z80sim/src/Makefile create mode 100644 configs/z80sim/src/README.txt create mode 100644 configs/z80sim/src/z80_decodeirq.c create mode 100644 configs/z80sim/src/z80_irq.c create mode 100644 configs/z80sim/src/z80_serial.c create mode 100644 configs/z80sim/src/z80_timerisr.c diff --git a/configs/z80sim/Make.defs b/configs/z80sim/Make.defs new file mode 100644 index 0000000000..73ba579b7d --- /dev/null +++ b/configs/z80sim/Make.defs @@ -0,0 +1,83 @@ +############################################################################ +# Make.defs +# +# Copyright (C) 2007, 2008 Gregory Nutt. All rights reserved. +# Author: Gregory Nutt +# +# Redistribution and use in source and binary forms, with or without +# modification, are permitted provided that the following conditions +# are met: +# +# 1. Redistributions of source code must retain the above copyright +# notice, this list of conditions and the following disclaimer. +# 2. Redistributions in binary form must reproduce the above copyright +# notice, this list of conditions and the following disclaimer in +# the documentation and/or other materials provided with the +# distribution. +# 3. Neither the name Gregory Nutt nor the names of its contributors may be +# used to endorse or promote products derived from this software +# without specific prior written permission. +# +# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS +# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE +# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, +# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, +# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS +# OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED +# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT +# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN +# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE +# POSSIBILITY OF SUCH DAMAGE. +# +############################################################################ + +include ${TOPDIR}/.config + +ifeq ("${CONFIG_DEBUG}","y") + ARCHOPTIMIZATION = --debug +else + ARCHOPTIMIZATION = +endif + +ARCHCPUFLAGS = -mz80 --stack-auto --int-long-reent --float-reent +ARCHPICFLAGS = +ARCHWARNINGS = +ARCHDEFINES = +ARCHINCLUDES = -I. -I$(TOPDIR)/include + +CROSSDEV = +CC = sdcc +CPP = sdcpp +LD = link-z80 +AS = as-z80 +AR = sdcclib -a + +CFLAGS = $(ARCHWARNINGS) $(ARCHOPTIMIZATION) \ + $(ARCHCPUFLAGS) $(ARCHINCLUDES) $(ARCHDEFINES) +CPPFLAGS = $(ARCHINCLUDES) $(ARCHDEFINES) +ASFLAGS = + +SDCCLIBDIR = /usr/local/share/sdcc/lib/z80 +SDCCPATH = -L$(SDCCLIBDIR) +SDCCLIBS = -lz80.lib + +IRAM_SIZE = 0x100 +DEF_STACK_BASE = 0x24 +LDFLAGS = --model-large --nostdlib \ + --data-loc $(DEF_STACK_BASE) --iram-size $(IRAM_SIZE) \ + --code-loc 0x2100 --code-size 0x5f40 \ + --xram-loc $(IRAM_SIZE) --xram-size 0x1f00 + +ASMEXT = .asm +OBJEXT = .o +LIBEXT = .lib +EXEEXT = .hex + +HOSTCC = gcc +HOSTINCLUDES = -I. +HOSTCFLAGS = -Wall -wstrict-prototypes -Wshadow -g -pipe +HOSTLDFLAGS = + + diff --git a/configs/z80sim/README.txt b/configs/z80sim/README.txt new file mode 100644 index 0000000000..50be916e14 --- /dev/null +++ b/configs/z80sim/README.txt @@ -0,0 +1,20 @@ +pjrc-8051 README +^^^^^^^^^^^^^^^^ + +This port uses a primitive, simulated Z80 and the SDCC toolchain. + +The SDCC toolchain is available from http://sdcc.sourceforge.net/. All +testing has been performed using verison 2.6.0 of the SDDC toolchain. + +Building the SDCC toolchain +^^^^^^^^^^^^^^^^^^^^^^^^^^^ + +The SDCC toolchain is built with the standard configure/make/make install +sequence. However, some special actions are required to generate libraries +compatible with this build. First start with the usual steps + + download + unpack + cd sdcc + ./configure + make diff --git a/configs/z80sim/defconfig b/configs/z80sim/defconfig new file mode 100644 index 0000000000..a806bfc6b3 --- /dev/null +++ b/configs/z80sim/defconfig @@ -0,0 +1,289 @@ +############################################################ +# defconfig +# +# Copyright (C) 2007 Gregory Nutt. All rights reserved. +# Author: Gregory Nutt +# +# Redistribution and use in source and binary forms, with or without +# modification, are permitted provided that the following conditions +# are met: +# +# 1. Redistributions of source code must retain the above copyright +# notice, this list of conditions and the following disclaimer. +# 2. Redistributions in binary form must reproduce the above copyright +# notice, this list of conditions and the following disclaimer in +# the documentation and/or other materials provided with the +# distribution. +# 3. Neither the name Gregory Nutt nor the names of its contributors may be +# used to endorse or promote products derived from this software +# without specific prior written permission. +# +# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS +# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE +# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, +# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, +# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS +# OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED +# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT +# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN +# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE +# POSSIBILITY OF SUCH DAMAGE. +# +############################################################ +# +# Architecture selection +# +# CONFIG_ARCH - identifies the arch subdirectory and, hence, the +# processor architecture. +# CONFIG_ARCH_8051 - Set if processor is 8051 family +# CONFIG_ARCH_8052 = Set if processor is 8052 family +# CONFIG_ARCH_BOARD - identifies the configs subdirectory and, hence, +# the board that supports the particular chip or SoC. +# CONFIG_ARCH_BOARD_name - for use in C code +# CONFIG_DRAM_SIZE - Describes the installed DRAM. +# +CONFIG_ARCH=z80 +CONFIG_ARCH_Z80=y +CONFIG_ARCH_CHIP=z80 +CONFIG_ARCH_CHIP_Z80=1 +CONFIG_ARCH_BOARD=z80sim +CONFIG_DRAM_SIZE=65536 + +# +# General OS setup +# +# CONFIG_EXAMPLE - identifies the subdirectory in examples +# that will be used in the build +# CONFIG_DEBUG - enables built-in debug options +# CONFIG_DEBUG_VERBOSE - enables verbose debug output +# CONFIG_MM_REGIONS - If the architecture includes multiple +# regions of memory to allocate from, this specifies the +# number of memory regions that the memory manager must +# handle and enables the API mm_addregion(start, end); +# CONFIG_HAVE_LOWPUTC - architecture supports low-level, boot +# time console output +# CONFIG_TICKS_PER_MSEC - The default system timer is 100Hz +# or TICKS_PER_MSEC=10. This setting may be defined to +# inform NuttX that the processor hardware is providing +# system timer interrupts at some interrupt interval other +# than 10 msec. +# CONFIG_RR_INTERVAL - The round robin timeslice will be set +# this number of milliseconds; Round robin scheduling can +# be disabled by setting this value to zero. +# CONFIG_SCHED_INSTRUMENTATION - enables instrumentation in +# scheduler to monitor system performance +# CONFIG_TASK_NAME_SIZE - Spcifies that maximum size of a +# task name to save in the TCB. Useful if scheduler +# instrumentation is selected. Set to zero to disable. +# CONFIG_JULIAN_TIME - Enables Julian time conversions +# CONFIG_START_YEAR, CONFIG_START_MONTH, CONFIG_START_DAY - +# Used to initialize the internal time logic. +# CONFIG_DEV_CONSOLE - Set if architecture-specific logic +# provides /dev/console. Enables stdout, stderr, stdin. +# +CONFIG_EXAMPLE=ostest +CONFIG_DEBUG=n +CONFIG_DEBUG_VERBOSE=n +CONFIG_MM_REGIONS=2 +CONFIG_ARCH_LOWPUTC=y +CONFIG_RR_INTERVAL=0 +CONFIG_SCHED_INSTRUMENTATION=n +CONFIG_TASK_NAME_SIZE=0 +CONFIG_START_YEAR=2007 +CONFIG_START_MONTH=2 +CONFIG_START_DAY=21 +CONFIG_JULIAN_TIME=n +CONFIG_DEV_CONSOLE=n + +# +# The following can be used to disable categories of +# APIs supported by the OS. If the compiler supports +# weak functions, then it should not be necessary to +# disable functions unless you want to restrict usage +# of those APIs. +# +# There are certain dependency relationships in these +# features. +# +# o mq_notify logic depends on signals to awaken tasks +# waiting for queues to become full or empty. +# o pthread_condtimedwait() depends on signals to wake +# up waiting tasks. +# +CONFIG_DISABLE_CLOCK=y +CONFIG_DISABLE_POSIX_TIMERS=y +CONFIG_DISABLE_PTHREAD=y +CONFIG_DISABLE_SIGNALS=y +CONFIG_DISABLE_MQUEUE=y +CONFIG_DISABLE_MOUNTPOINT=y +CONFIG_DISABLE_ENVIRON=y + +# +# Misc libc settings +# +# CONFIG_NOPRINTF_FIELDWIDTH - sprintf-related logic is a +# little smaller if we do not support fieldwidthes +# +CONFIG_NOPRINTF_FIELDWIDTH=y + +# +# Allow for architecture optimized implementations +# +# The architecture can provide optimized versions of the +# following to improve sysem performance +# +CONFIG_ARCH_MEMCPY=n +CONFIG_ARCH_MEMCMP=n +CONFIG_ARCH_MEMMOVE=n +CONFIG_ARCH_MEMSET=n +CONFIG_ARCH_STRCMP=n +CONFIG_ARCH_STRCPY=n +CONFIG_ARCH_STRNCPY=n +CONFIG_ARCH_STRLEN=n +CONFIG_ARCH_BZERO=n +CONFIG_ARCH_KMALLOC=n +CONFIG_ARCH_KZMALLOC=n +CONFIG_ARCH_KFREE=n + +# +# General build options +# +# CONFIG_RRLOAD_BINARY - make the rrload binary format used with +# BSPs from www.ridgerun.com +# +CONFIG_RRLOAD_BINARY=n + +# +# Sizes of configurable things (0 disables) +# +# CONFIG_MAX_TASKS - The maximum number of simultaneously +# actived tasks. This value must be a power of two. +# CONFIG_MAX_TASK_ARGS - This controls the maximum number of +# of parameters that a task may receive (i.e., maxmum value +# of 'argc') +# CONFIG_NPTHREAD_KEYS - The number of items of thread- +# specific data that can be retained +# CONFIG_NFILE_DESCRIPTORS - The maximum number of file +# descriptors (one for each open) +# CONFIG_NFILE_STREAMS - The maximum number of streams that +# can be fopen'ed +# CONFIG_NAME_MAX - The maximum size of a file name. +# CONFIG_STDIO_BUFFER_SIZE - Size of the buffer to allocate +# on fopen. (Only if CONFIG_NFILE_STREAMS > 0) +# CONFIG_NUNGET_CHARS - Number of characters that can be +# buffered by ungetc() (Only if CONFIG_NFILE_STREAMS > 0) +# CONFIG_PREALLOC_MQ_MSGS - The number of pre-allocated message +# structures. The system manages a pool of preallocated +# message structures to minimize dynamic allocations +# CONFIG_MQ_MAXMSGSIZE - Message structures are allocated with +# a fixed payload size given by this settin (does not include +# other message structure overhead. +# CONFIG_MAX_WDOGPARMS - Maximum number of parameters that +# can be passed to a watchdog handler +# CONFIG_PREALLOC_WDOGS - The number of pre-allocated watchdog +# structures. The system manages a pool of preallocated +# watchdog structures to minimize dynamic allocations +# CONFIG_PREALLOC_TIMERS - The number of pre-allocated POSIX +# timer structures. The system manages a pool of preallocated +# timer structures to minimize dynamic allocations. Set to +# zero for all dynamic allocations. +# +CONFIG_MAX_TASKS=8 +CONFIG_MAX_TASK_ARGS=4 +CONFIG_NPTHREAD_KEYS=0 +CONFIG_NFILE_DESCRIPTORS=0 +CONFIG_NFILE_STREAMS=0 +CONFIG_NAME_MAX=32 +CONFIG_STDIO_BUFFER_SIZE=0 +CONFIG_NUNGET_CHARS=0 +CONFIG_PREALLOC_MQ_MSGS=0 +CONFIG_MQ_MAXMSGSIZE=0 +CONFIG_MAX_WDOGPARMS=2 +CONFIG_PREALLOC_WDOGS=4 +CONFIG_PREALLOC_TIMERS=0 + +# +# TCP/IP and UDP support via uIP +# CONFIG_NET - Enable or disable all network features +# CONFIG_NET_IPv6 - Build in support for IPv6 +# CONFIG_NSOCKET_DESCRIPTORS - Maximum number of socket descriptors per task/thread. +# CONFIG_NET_SOCKOPTS - Enable or disable support for socket options +# CONFIG_NET_BUFSIZE - uIP buffer size +# CONFIG_NET_TCP - TCP support on or off +# CONFIG_NET_TCP_CONNS - Maximum number of TCP connections (all tasks) +# CONFIG_NET_TCP_READAHEAD_BUFSIZE - Size of TCP read-ahead buffers +# CONFIG_NET_NTCP_READAHEAD_BUFFERS - Number of TCP read-ahead buffers (may be zero) +# CONFIG_NET_MAX_LISTENPORTS - Maximum number of listening TCP ports (all tasks) +# CONFIG_NET_UDP - UDP support on or off +# CONFIG_NET_UDP_CHECKSUMS - UDP checksums on or off +# CONFIG_NET_UDP_CONNS - The maximum amount of concurrent UDP connections +# CONFIG_NET_ICMP - ICMP ping support on or off +# CONFIG_NET_PINGADDRCONF - Use "ping" packet for setting IP address +# CONFIG_NET_STATISTICS - uIP statistics on or off +# CONFIG_NET_RECEIVE_WINDOW - The size of the advertised receiver's window +# CONFIG_NET_ARPTAB_SIZE - The size of the ARP table +# CONFIG_NET_BROADCAST - Broadcast support +# CONFIG_NET_LLH_LEN - The link level header length +# CONFIG_NET_FWCACHE_SIZE - number of packets to remember when looking for duplicates +CONFIG_NET=n +CONFIG_NET_IPv6=n +CONFIG_NSOCKET_DESCRIPTORS=0 +CONFIG_NET_SOCKOPTS=y +CONFIG_NET_BUFSIZE=420 +CONFIG_NET_TCP=n +CONFIG_NET_TCP_CONNS=40 +CONFIG_NET_MAX_LISTENPORTS=40 +CONFIG_NET_UDP=n +CONFIG_NET_UDP_CHECKSUMS=y +#CONFIG_NET_UDP_CONNS=10 +CONFIG_NET_ICMP=n +#CONFIG_NET_PINGADDRCONF=0 +CONFIG_NET_STATISTICS=y +#CONFIG_NET_RECEIVE_WINDOW= +#CONFIG_NET_ARPTAB_SIZE=8 +CONFIG_NET_BROADCAST=n +#CONFIG_NET_LLH_LEN=14 +#CONFIG_NET_FWCACHE_SIZE=2 + +# +# UIP Network Utilities +# CONFIG_NET_DHCP_LIGHT - Reduces size of DHCP +# CONFIG_NET_RESOLV_ENTRIES - Number of resolver entries +CONFIG_NET_DHCP_LIGHT=n +CONFIG_NET_RESOLV_ENTRIES=4 + +# +# Settings for examples/nsh +CONFIG_EXAMPLES_NSH_TELNET=n +CONFIG_EXAMPLES_NSH_IOBUFFER_SIZE=512 +CONFIG_EXAMPLES_NSH_CMD_SIZE=40 +CONFIG_EXAMPLES_NSH_STACKSIZE=4096 +CONFIG_EXAMPLES_NSH_DHCPC=n +CONFIG_EXAMPLES_NSH_NOMAC=n +CONFIG_EXAMPLES_NSH_IPADDR=(10<<24|0<<16|0<<8|2) +CONFIG_EXAMPLES_NSH_DRIPADDR=(10<<24|0<<16|0<<8|1) +CONFIG_EXAMPLES_NSH_NETMASK=(255<<24|255<<16|255<<8|0) + +# +# Stack and heap information +# +# CONFIG_BOOT_FROM_FLASH - Some configurations support XIP +# operation from FLASH. +# CONFIG_CUSTOM_STACK - The up_ implementation will handle +# all stack operations outside of the nuttx model. +# CONFIG_STACK_POINTER - The initial stack pointer +# CONFIG_PROC_STACK_SIZE - The size of the initial stack +# CONFIG_PTHREAD_STACK_MIN - Minimum pthread stack size +# CONFIG_PTHREAD_STACK_DEFAULT - Default pthread stack size +# CONFIG_HEAP_BASE - The beginning of the heap +# CONFIG_HEAP_SIZE - The size of the heap +# +CONFIG_BOOT_FROM_FLASH=n +CONFIG_CUSTOM_STACK=n +CONFIG_PROC_STACK_SIZE=1024 +CONFIG_PTHREAD_STACK_MIN= +CONFIG_PTHREAD_STACK_DEFAULT= +CONFIG_HEAP_SIZE=32768 +CONFIG_HEAP_BASE=CONFIG_DRAM_SIZE-CONFIG_HEAP_SIZE diff --git a/configs/z80sim/include/README.txt b/configs/z80sim/include/README.txt new file mode 100644 index 0000000000..4af1b2ad23 --- /dev/null +++ b/configs/z80sim/include/README.txt @@ -0,0 +1 @@ +This directory contains header files unique to the z80 simulation diff --git a/configs/z80sim/include/board.h b/configs/z80sim/include/board.h new file mode 100644 index 0000000000..85edae22cd --- /dev/null +++ b/configs/z80sim/include/board.h @@ -0,0 +1,51 @@ +/************************************************************ + * board/board.h + * + * Copyright (C) 2007, 2008 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ************************************************************/ + +#ifndef __ARCH_BOARD_BOARD_H +#define __ARCH_BOARD_BOARD_H + +/************************************************************ + * Included Files + ************************************************************/ + +/************************************************************ + * Definitions + ************************************************************/ + +/************************************************************ + * Inline Functions + ************************************************************/ + +#endif /* __ARCH_BOARD_BOARD_H */ diff --git a/configs/z80sim/setenv.sh b/configs/z80sim/setenv.sh new file mode 100755 index 0000000000..69614aefe8 --- /dev/null +++ b/configs/z80sim/setenv.sh @@ -0,0 +1,45 @@ +#!/bin/sh +# setenv.sh +# +# Copyright (C) 2007 Gregory Nutt. All rights reserved. +# Author: Gregory Nutt +# +# Redistribution and use in source and binary forms, with or without +# modification, are permitted provided that the following conditions +# are met: +# +# 1. Redistributions of source code must retain the above copyright +# notice, this list of conditions and the following disclaimer. +# 2. Redistributions in binary form must reproduce the above copyright +# notice, this list of conditions and the following disclaimer in +# the documentation and/or other materials provided with the +# distribution. +# 3. Neither the name Gregory Nutt nor the names of its contributors may be +# used to endorse or promote products derived from this software +# without specific prior written permission. +# +# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS +# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE +# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, +# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, +# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS +# OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED +# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT +# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN +# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE +# POSSIBILITY OF SUCH DAMAGE. +# + +if [ "$(basename $0)" = "setenv" ] ; then + echo "You must source this script, not run it!" 1>&2 + exit 1 +fi + +if [ -z ${PATH_ORIG} ]; then export PATH_ORIG=${PATH}; fi + +export SDCC_BIN=/usr/local/bin +export PATH=${SDCC_BIN}:/sbin:/usr/sbin:${PATH_ORIG} + +echo "PATH : ${PATH}" diff --git a/configs/z80sim/src/Makefile b/configs/z80sim/src/Makefile new file mode 100644 index 0000000000..24226f2f98 --- /dev/null +++ b/configs/z80sim/src/Makefile @@ -0,0 +1,79 @@ +############################################################ +# Makefile +# +# Copyright (C) 2007 Gregory Nutt. All rights reserved. +# Author: Gregory Nutt +# +# Redistribution and use in source and binary forms, with or without +# modification, are permitted provided that the following conditions +# are met: +# +# 1. Redistributions of source code must retain the above copyright +# notice, this list of conditions and the following disclaimer. +# 2. Redistributions in binary form must reproduce the above copyright +# notice, this list of conditions and the following disclaimer in +# the documentation and/or other materials provided with the +# distribution. +# 3. Neither the name Gregory Nutt nor the names of its contributors may be +# used to endorse or promote products derived from this software +# without specific prior written permission. +# +# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS +# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE +# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, +# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, +# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS +# OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED +# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT +# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN +# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE +# POSSIBILITY OF SUCH DAMAGE. +# +############################################################ + +-include $(TOPDIR)/Make.defs + +MKDEP = $(TOPDIR)/tools/mkdeps.sh +CFLAGS += -I$(TOPDIR)/sched + +ASRCS = z80_lowputc$(ASMEXT) +AOBJS = $(ASRCS:$(ASMEXT)=$(OBJEXT)) +CSRCS = z80_decodeirq.c z80_irq.c z80_serial.c z80_timerisr.c +COBJS = $(CSRCS:.c=$(OBJEXT)) + +SRCS = $(ASRCS) $(CSRCS) +OBJS = $(AOBJS) $(COBJS) + +CFLAGS += -I $(TOPDIR)/arch/$(CONFIG_ARCH)/src + +all: libboard$(LIBEXT) + +$(AOBJS): %$(OBJEXT): %$(ASMEXT) + $(CC) -c $(CFLAGS) -D__ASSEMBLY__ $< -o $@ + +$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c + $(CC) -c $(CFLAGS) $< -o $@ + +libboard$(LIBEXT): $(OBJS) + ( for obj in $(OBJS) ; do \ + $(AR) $@ $${obj} || \ + { echo "$(AR) $@ $obj FAILED!" ; exit 1 ; } ; \ + done ; ) + +.depend: Makefile $(SRCS) + $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep + touch $@ + +depend: .depend + +clean: + rm -f libboard$(LIBEXT) + rm -f *.asm *.rel *.lst *.rst *.sym *.adb *.lnk *.map *.mem *.ihx *.hex *~ + if [ ! -z "$(OBJEXT)" ]; then rm -f *$(OBJEXT); fi + +distclean: clean + rm -f Make.dep .depend + +-include Make.dep diff --git a/configs/z80sim/src/README.txt b/configs/z80sim/src/README.txt new file mode 100644 index 0000000000..13c1e3e586 --- /dev/null +++ b/configs/z80sim/src/README.txt @@ -0,0 +1 @@ +This directory contains drivers unique to the z80 simulation diff --git a/configs/z80sim/src/z80_decodeirq.c b/configs/z80sim/src/z80_decodeirq.c new file mode 100644 index 0000000000..d4faf0f89c --- /dev/null +++ b/configs/z80sim/src/z80_decodeirq.c @@ -0,0 +1,119 @@ +/******************************************************************************** + * z80/z80_decodeirq.c + * + * Copyright (C) 2007, 2008 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ********************************************************************************/ + +/******************************************************************************** + * Included Files + ********************************************************************************/ + +#include +#include +#include +#include +#include +#include +#include "up_arch.h" +#include "os_internal.h" +#include "up_internal.h" + +/******************************************************************************** + * Definitions + ********************************************************************************/ + +/******************************************************************************** + * Public Data + ********************************************************************************/ + +/******************************************************************************** + * Private Data + ********************************************************************************/ + +/******************************************************************************** + * Private Functions + ********************************************************************************/ + +/******************************************************************************** + * Public Funtions + ********************************************************************************/ + +void up_decodeirq(uint16* regs) +{ +#ifdef CONFIG_SUPPRESS_INTERRUPTS + lib_lowprintf("Unexpected IRQ\n"); + current_regs = regs; + PANIC(OSERR_ERREXCEPTION); +#else + /* Decode the interrupt. First, fetch the interrupt id register. */ + + uint16 irqentry = getreg16(DM320_INTC_IRQENTRY0); + + /* The irqentry value is an offset into a table. Zero means no interrupt. */ + + if (irqentry != 0) + { + /* If non-zero, then we can map the table offset into an IRQ number */ + + int irq = (irqentry >> 2) - 1; + + /* Verify that the resulting IRQ number is valie */ + + if ((unsigned)irq < NR_IRQS) + { + /* Mask and acknowledge the interrupt */ + + up_maskack_irq(irq); + + /* Current regs non-zero indicates that we are processing an interrupt; + * current_regs is also used to manage interrupt level context switches. + */ + + current_regs = regs; + + /* Deliver the IRQ */ + + irq_dispatch(irq, regs); + + /* Indicate that we are no long in an interrupt handler */ + + current_regs = NULL; + + /* Unmask the last interrupt (global interrupts are still + * disabled. + */ + + up_enable_irq(irq); + } + } +#endif +} diff --git a/configs/z80sim/src/z80_irq.c b/configs/z80sim/src/z80_irq.c new file mode 100644 index 0000000000..3c3443663f --- /dev/null +++ b/configs/z80sim/src/z80_irq.c @@ -0,0 +1,110 @@ +/**************************************************************************** + * z80/z80_irq.c + * + * Copyright (C) 2007 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name Gregory Nutt nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include +#include +#include +#include "up_arch.h" +#include "os_internal.h" +#include "up_internal.h" + +/**************************************************************************** + * Definitions + ****************************************************************************/ + +/**************************************************************************** + * Public Data + ****************************************************************************/ + +uint32 *current_regs; + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Public Funtions + ****************************************************************************/ + +/**************************************************************************** + * Name: up_irqinitialize + ****************************************************************************/ + +void up_irqinitialize(void) +{ + /* currents_regs is non-NULL only while processing an interrupt */ + + current_regs = NULL; + + /* And finally, enable interrupts */ + +#ifndef CONFIG_SUPPRESS_INTERRUPTS + irqrestore(TRUE); +#endif +} + +/**************************************************************************** + * Name: up_disable_irq + * + * Description: + * Disable the IRQ specified by 'irq' + * + ****************************************************************************/ + +void up_disable_irq(int irq) +{ + irqrestore(FALSE); +} + +/**************************************************************************** + * Name: up_enable_irq + * + * Description: + * Enable the IRQ specified by 'irq' + * + ****************************************************************************/ + +void up_enable_irq(int irq) +{ + irqrestore(TRUE); +} diff --git a/configs/z80sim/src/z80_serial.c b/configs/z80sim/src/z80_serial.c new file mode 100644 index 0000000000..73bba49327 --- /dev/null +++ b/configs/z80sim/src/z80_serial.c @@ -0,0 +1,334 @@ +/**************************************************************************** + * z80/z80_serial.c + * + * Copyright (C) 2007, 2008 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include + +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include + +#include "up_arch.h" +#include "os_internal.h" +#include "up_internal.h" + +#if CONFIG_NFILE_DESCRIPTORS > 0 + +/**************************************************************************** + * Definitions + ****************************************************************************/ + +/**************************************************************************** + * Private Types + ****************************************************************************/ + +/**************************************************************************** + * Private Function Prototypes + ****************************************************************************/ + +static int up_setup(struct uart_dev_s *dev); +static void up_shutdown(struct uart_dev_s *dev); +static int up_interrupt(int irq, void *context); +static int up_ioctl(struct file *filep, int cmd, unsigned long arg); +static int up_receive(struct uart_dev_s *dev, uint32 *status); +static void up_rxint(struct uart_dev_s *dev, boolean enable); +static boolean up_rxfifonotempty(struct uart_dev_s *dev); +static void up_send(struct uart_dev_s *dev, int ch); +static void up_txint(struct uart_dev_s *dev, boolean enable); +static boolean up_txfifonotfull(struct uart_dev_s *dev); +static boolean up_txfifoempty(struct uart_dev_s *dev); + +/**************************************************************************** + * Private Variables + ****************************************************************************/ + +struct uart_ops_s g_uart_ops = +{ + .setup = up_setup, + .shutdown = up_shutdown, + .handler = up_interrupt, + .ioctl = up_ioctl, + .receive = up_receive, + .rxint = up_rxint, + .rxfifonotempty = up_rxfifonotempty, + .send = up_send, + .txint = up_txint, + .txfifonotfull = up_txfifonotfull, + .txfifoempty = up_txfifoempty, +}; + +/* I/O buffers */ + +static char g_uartrxbuffer[CONFIG_UART0_RXBUFSIZE]; +static char g_uarttxbuffer[CONFIG_UART0_TXBUFSIZE]; + +/* This describes the state of the fake UART port. */ + +static uart_dev_t g_uartport = +{ + .irq = DM320_IRQ_UART0, + .recv = + { + .size = CONFIG_UART0_RXBUFSIZE, + .buffer = g_uart0rxbuffer, + }, + .xmit = + { + .size = CONFIG_UART0_TXBUFSIZE, + .buffer = g_uart0txbuffer, + }, + .ops = &g_uart_ops, + .priv = NULL, +}; + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: up_setup + * + * Description: + * Configure the UART baud, bits, parity, fifos, etc. This + * method is called the first time that the serial port is + * opened. + * + ****************************************************************************/ + +static int up_setup(struct uart_dev_s *dev) +{ + return OK; +} + +/**************************************************************************** + * Name: up_shutdown + * + * Description: + * Disable the UART. This method is called when the serial + * port is closed + * + ****************************************************************************/ + +static void up_shutdown(struct uart_dev_s *dev) +{ +} + +/**************************************************************************** + * Name: up_interrupt + * + * Description: + * This is the UART interrupt handler. It will be invoked + * when an interrupt received on the 'irq' It should call + * uart_transmitchars or uart_receivechar to perform the + * appropriate data transfers. The interrupt handling logic\ + * must be able to map the 'irq' number into the approprite + * uart_dev_s structure in order to call these functions. + * + ****************************************************************************/ + +static int up_interrupt(int irq, void *context) +{ + return OK; +} + +/**************************************************************************** + * Name: up_ioctl + * + * Description: + * All ioctl calls will be routed through this method + * + ****************************************************************************/ + +static int up_ioctl(struct file *filep, int cmd, unsigned long arg) +{ + *get_errno_ptr() = ENOTTY; + return ERROR; +} + +/**************************************************************************** + * Name: up_receive + * + * Description: + * Called (usually) from the interrupt level to receive one + * character from the UART. Error bits associated with the + * receipt are provided in the the return 'status'. + * + ****************************************************************************/ + +static int up_receive(struct uart_dev_s *dev, uint32 *status) +{ + uint8 ch = up_lowgetc(); + *status = 0; + return ch; +} + +/**************************************************************************** + * Name: up_rxint + * + * Description: + * Call to enable or disable RX interrupts + * + ****************************************************************************/ + +static void up_rxint(struct uart_dev_s *dev, boolean enable) +{ +} + +/**************************************************************************** + * Name: up_rxfifonotempty + * + * Description: + * Return TRUE if the receive fifo is not empty + * + ****************************************************************************/ + +static boolean up_rxfifonotempty(struct uart_dev_s *dev) +{ + return TRUE; +} + +/**************************************************************************** + * Name: up_send + * + * Description: + * This method will send one byte on the UART + * + ****************************************************************************/ + +static void up_send(struct uart_dev_s *dev, int ch) +{ + up_lowputc(ch); +} + +/**************************************************************************** + * Name: up_txint + * + * Description: + * Call to enable or disable TX interrupts + * + ****************************************************************************/ + +static void up_txint(struct uart_dev_s *dev, boolean enable) +{ +} + +/**************************************************************************** + * Name: up_txfifonotfull + * + * Description: + * Return TRUE if the tranmsit fifo is not full + * + ****************************************************************************/ + +static boolean up_txfifonotfull(struct uart_dev_s *dev) +{ + return TRUE; +} + +/**************************************************************************** + * Name: up_txfifoempty + * + * Description: + * Return TRUE if the transmit fifo is empty + * + ****************************************************************************/ + +static boolean up_txfifoempty(struct uart_dev_s *dev) +{ + return FALSE; +} + +/**************************************************************************** + * Public Funtions + ****************************************************************************/ + +/**************************************************************************** + * Name: up_serialinit + * + * Description: + * Performs the low level UART initialization early in + * debug so that the serial console will be available + * during bootup. This must be called before up_serialinit. + * + ****************************************************************************/ + +void up_earlyserialinit(void) +{ +} + +/**************************************************************************** + * Name: up_serialinit + * + * Description: + * Register serial console and serial ports. This assumes + * that up_earlyserialinit was called previously. + * + ****************************************************************************/ + +void up_serialinit(void) +{ + (void)uart_register("/dev/console", &g_uartport); + (void)uart_register("/dev/ttyS0", &g_uartport); +} +#endif /* CONFIG_NFILE_DESCRIPTORS > 0 */ + +/**************************************************************************** + * Name: up_putc + * + * Description: + * Provide priority, low-level access to support OS debug + * writes + * + ****************************************************************************/ + +int up_putc(int ch) +{ + up_lowputc(ch); +} + + + + diff --git a/configs/z80sim/src/z80_timerisr.c b/configs/z80sim/src/z80_timerisr.c new file mode 100644 index 0000000000..603a66c91d --- /dev/null +++ b/configs/z80sim/src/z80_timerisr.c @@ -0,0 +1,153 @@ +/************************************************************ + * dm320/dm320_timerisr.c + * + * Copyright (C) 2007 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name Gregory Nutt nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ************************************************************/ + +/************************************************************ + * Included Files + ************************************************************/ + +#include +#include +#include +#include +#include "clock_internal.h" +#include "up_internal.h" +#include "up_arch.h" + +/************************************************************ + * Definitions + ************************************************************/ + +/* DM320 Timers + * + * Each of the general-purpose timers can run in one of two modes: one- + * shot mode and free-run mode. In one-shot mode, an interrupt only + * occurs once and then the timer must be explicitly reset to begin the + * timing operation again. In free-run mode, when the timer generates an + * interrupt, the timer counter is automatically reloaded to start the count + * operation again. Use the bit field MODE in TMMDx to configure the + * timer for one-shot more or free-run mode. The bit field MODE in TMMDx + * also allows you to stop the timer. + * + * Either the ARM clock divided by 2 (CLK_ARM/2) or an external clock + * connected to the M27XI pin can be selected as the clock source of the + * timer. + * + * The actual clock frequency used in the timer count operation is the input + * clock divided by: 1 plus the value set in the bit field PRSCL of the + * register TMPRSCLx (10 bits). The timer expires when it reaches the + * value set in the bit field DIV of the register TMDIVx (16 bits) plus 1. + * PRSCL+1 is the source clock frequency divide factor and DIV+1 is the + * timer count value. The frequency of a timer interrupt is given by the + * following equation: + * + * Interrupt Frequency = (Source Clock Frequency) / (PRSCL+1) / (DIV+1) + */ + +/* System Timer + * + * Timer0 is dedicated as the system timer. The rate of system timer + * interrupts is assumed to to 10MS per tick / 100Hz. The following + * register settings are used for timer 0 + * + * System clock formula: + * Interrupt Frequency = (Source Clock Frequency) / (PRSCL+1) / (DIV+1) + * Source Clock Frequency = 27MHz (PLL clock) + * DIV = 26,999 (Yields 1Khz timer clock) + * PRSCL = 9 (Produces 100Hz interrupts) + */ + +#define DM320_TMR0_MODE DM320_TMR_MODE_FREERUN /* Free running */ +#define DM320_TMR0_DIV 26999 /* (see above) */ +#define DM320_TMR0_PRSCL 9 /* (see above) */ + +/************************************************************ + * Private Types + ************************************************************/ + +/************************************************************ + * Private Function Prototypes + ************************************************************/ + +/************************************************************ + * Global Functions + ************************************************************/ + +/************************************************************ + * Function: up_timerisr + * + * Description: + * The timer ISR will perform a variety of services for + * various portions of the systems. + * + ************************************************************/ + +int up_timerisr(int irq, uint32 *regs) +{ + /* Process timer interrupt */ + + sched_process_timer(); + return 0; +} + +/************************************************************ + * Function: up_timerinit + * + * Description: + * This function is called during start-up to initialize + * the timer interrupt. + * + ************************************************************/ + +void up_timerinit(void) +{ + up_disable_irq(DM320_IRQ_SYSTIMER); + + /* Start timer0 running so that an interrupt is generated at + * the rate MSEC_PER_TICK. + */ + + putreg16(DM320_TMR0_PRSCL, DM320_TIMER0_TMPRSCL); /* Timer 0 Prescalar */ + putreg16(DM320_TMR0_DIV, DM320_TIMER0_TMDIV); /* Timer 0 Divisor (count) */ + + /* Start the timer */ + + putreg16(DM320_TMR0_MODE, DM320_TIMER0_TMMD); /* Timer 0 Mode */ + + /* Attach and enable the timer interrupt */ + + irq_attach(DM320_IRQ_SYSTIMER, (xcpt_t)up_timerisr); + up_enable_irq(DM320_IRQ_SYSTIMER); +} +