Latest changes from Andrew

6 files changed, 1708 insertions, 1 deletions

diff --git a/sim/ppc/.Sanitize b/sim/ppc/.Sanitize
index 0e10881..47ca881 100644
--- a/sim/ppc/.Sanitize
+++ b/sim/ppc/.Sanitize
@@ -73,7 +73,10 @@ filter_filename.h
 hw_com.c
 hw_cpu.c
 hw_cpu.h
+hw_disk.c
 hw_eeprom.c
+hw_htab.c
+hw_init.c
 hw_iobus.c
 hw_memory.c
 hw_nvram.c
@@ -82,6 +85,9 @@ hw_pci_ide.c
 hw_phb.c
 hw_phb.h
 hw_pic.c
+hw_register.c
+hw_trace.c
+hw_vm.c
 idecode_branch.h
 idecode_expression.h
 idecode_fields.h
@@ -101,6 +107,7 @@ options.c
 options.h
 os_emul.c
 os_emul.h
+pk_disklabel.c
 ppc-cache-rules
 ppc-instructions
 ppc-opcode-complex
diff --git a/sim/ppc/ChangeLog b/sim/ppc/ChangeLog
index c562fb3..a3738b1 100644
--- a/sim/ppc/ChangeLog
+++ b/sim/ppc/ChangeLog
@@ -1,9 +1,25 @@
+Wed Jun  5 01:39:07 1996  Andrew Cagney  <cagney@kremvax.highland.com.au>
+
+	* psim.c (psim_options): Correct type of dummy arguments being
+        passed to a device_ioctl call.
+
+	* hw_init.c (hw_data_init_data_callback): Adjust printf arguments.
+	(write_stack_arguments): Ditto.
+	* hw_trace.c: Instance callback entry no longer a table.
+
+Wed Jun  5 01:39:07 1996  Andrew Cagney  <cagney@kremvax.highland.com.au>
+
+	* emul_unix.c (do_unix_umask): Cast printf argument.
+	(convert_to_linux_termios): Use LINUX_VSWTC not LINUX_VSWCH
+
 Mon Jun  3 15:02:04 1996  Michael Meissner  <meissner@tiktok.cygnus.com>
 
-	* device_table.c (update_for_binary_section): Abort if we find an
+	* hw_init.c (update_for_binary_section): Abort if we find an
 	.interp section, which indicates the need for shared libraries to
 	be loaded.
 
+Mon Jun  3 15:02:04 1996  Michael Meissner  <meissner@tiktok.cygnus.com>
+
 	* emul_unix.c (do_unix_{time,gettimeofday,getrusage}): Add support
 	for time, gettimeofday, and getrusage system calls.
 	({solaris,linux}_descriptors): Add new system calls.
@@ -14,6 +30,17 @@ Mon Jun  3 15:02:04 1996  Michael Meissner  <meissner@tiktok.cygnus.com>
 	(AC_TYPE_{MODE,OFF,PID,SIZE,UID}_T): Define.
 	* config{.in,ure}: Regenerate.
 
+Mon Jun  3 23:19:57 1996  Andrew Cagney  <cagney@kremvax.highland.com.au>
+
+	* emul_netbsd.c (emul_netbsd_create): Use the more specific names
+        `ppc-elf' and `ppc-xcoff' for the stack-type.
+	* emul_unix.c (emul_unix_create): Ditto.
+	* emul_bugapi.c (emul_bugapi_create): Ditto.
+	* hw_init.c: Reconize the new names.
+
+	* emul_unix.c (do_unix_break): Adjust so that the updated ioctl
+	call is used (no system parameter).
+
 Sun Jun  2 11:21:17 1996  Michael Meissner  <meissner@tiktok.cygnus.com>
 
 	* emul_unix.{h,c}: New files to provide Solaris and Linux system
@@ -46,6 +73,154 @@ Sun Jun  2 11:21:17 1996  Michael Meissner  <meissner@tiktok.cygnus.com>
 	* psim.c (psim_usage): Add message about solaris, linux
 	emulations.
 
+Thu May 30 00:00:10 1996  Andrew Cagney  <cagney@kremvax.highland.com.au>
+
+	* hw_iobus.c: Tidy up notes so that they can be auto-extracted.
+
+	* README: Correct PSIM's title
+
+Wed May 29 23:50:26 1996  Andrew Cagney  <cagney@kremvax.highland.com.au>
+
+	* basics.h: New global type object_disposition, used to indicate
+        the status of objects when things are restarted.
+
+Fri May 17 17:28:52 1996  Andrew Cagney  <cagney@benjimen.highland.com.au>
+
+	* device_table.h: Change the interrupt descriptor structure so
+        that it includes an additional member - an upper bound on the
+        interrupts by that name.
+
+	* device.c (device_interrupt_decode): Allow a range of interrupt
+        ports (eg rst0 .. rst6) if the port descriptors bound is non zero.
+
+	* device.c (device_tree_print_device): Include a list of valid
+        interrupt ports when listing supported devices.
+
+	* device.h, device.c (device_child_interrupt_*): Delete. Not used.
+
+	* emul_generic.c (emul_add_tree_hardware): Modify the creation of
+        the interrupt net so that it uses int0 .. intN.
+
+Tue May 14 23:03:53 1996  Andrew Cagney  <cagney@kremvax.highland.com.au>
+
+	* device.h, device.c (device_ioctl): Drop the system argument.
+        Devices can not obtain this using the device_system() call.
+	* device_table.h: Adjust accordingly.
+	* hw_*.c: Adjust accordingly.
+	* emul_netbsd.c (do_break): Adjust call to vm device accordingly.
+	* psim.c (psim_options): Use a device_ioctl call to force the
+        hw_trace device to update the trace options.
+	* hw_trace.c: Replace the init function with an ioctl call.  Adjust
+	doc accordingly.
+
+	* psim.c (psim_init): Re-order initialization so that the
+        os-emulation is initialized after the device tree.  Without this,
+        os-emul's are not able to create instances or access properties
+        that contain an instance handle.
+
+	* device.h, device.c (device_add_*_property): Make these functions
+        internal to device.c.  The user has access to the more generic
+        device_tree_add_parsed function.  Differentiate between the initial
+	and current value for each property.
+	* (clean_device_properties): New function that deletes any
+	properties created after the start of a simulation and restores
+	the initial value of any others (ignoring ihandles).
+	* (init_device_properties): (Re)Initialize any properties that
+	contain ihandles. create
+
+	* (device_tree_init): Include calls to clean the device tree's
+        properties and then initialize them.  Document this in the device.h
+	file.
+
+Mon May  6 17:36:15 1996  Andrew Cagney  <cagney@kremvax.highland.com.au>
+
+	* interrupts.c (decrementer_interrupt): Always pend a decrementer
+        interrupt even if it is not yet possible to deliver it.
+
+Wed May  1 12:26:51 1996  Andrew Cagney  <cagney@benjimen>
+
+	* mon.h, mon.c (mon_get_number_of_insns): Make this externally
+ 	visable adjusting the arguments so that the interface is correct.
+	(mon_print_info): Adjust calls.
+	
+	* registers.h, registers.c (register_description): Add phony
+ 	cycle, insn and stall registers.
+
+	* psim.c (psim_read_register): Return nr of instructions for given
+ 	processor.
+
+Tue Apr 30 22:09:09 1996  Andrew Cagney  <cagney@kremvax.highland.com.au>
+
+	* hw_htab.c: New file. Extract contents from disk_table.c.
+        Contains a device that, during initialization will create a
+        PowerPC htab in memory.
+	* hw_register.c: New file. Extract contents from disk_table.c.
+        Contains a device that, during initialization, will parse its
+        property list and use that to initialize various processor
+        registers (not target specific).
+	* hw_vm.c: New file. Extract contents from disk_table.c.  Contains
+        a device that handles accesses to invalid virtual memory addresses
+        (in user mode).
+	* hw_init.c: New file. Extract contents from disk_table.c.  Misc
+        devices that can initialize memory from a file.
+	* hw_trace.c: New file. Extract contents from disk_table.c.
+        Configure trace options from property values.
+
+	* Makefile.in (hw_htab.o, hw_register.o, hw_vm.o, hw_init.o,
+        hw_trace.c): Add new device files.
+
+	* device_table.c: Remove above code, now in separate independant
+        files.
+
+Fri Apr 26 00:00:07 1996  Andrew Cagney  <cagney@kremvax.highland.com.au>
+
+	* hw_disk.c: New file.  Disk and CDROM device.
+
+	* Makefile.in (hw_disk.o): Add device hw_disk.c.
+
+	* pk_disklabel.c: New file.  Implement the miss-named disk-label
+        package.
+
+	* Makefile.in (pk.h): Create the file pk.h that contains a list of all
+	the packages.
+
+	* Makefile.in (hw.h, hw.c): Add dependancy on Makefile so that
+        they are re-created when the makefile is updated.
+
+	* emul_generic.c (emul_add_tree_hardware): Add a disk device
+        (below the iobus) to the device tree.  Include an ihandle of
+	the disk as /chosen/disk.
+
+	* emul_bugapi.c (emul_bugapi_create): Don't initialize the input,
+        output and (new) disk handles yet.
+	* (emul_bugapi_init): Initialize the input, output (and just added)
+	disk ihandles here.
+	* (emul_bugapi_do_diskio): New.  Performs disk i/o (well at least
+	what I think the behavour is).
+	* emul_bugapi.c (emul_bugapi_instruction_call): Add hook to disk
+	i/o bug call.  For RETURN call, exit using gpr[3]'s status even
+	though this isn't part of the spec - makes it possible for machine
+	code to signal the aporting of a simulation run.
+
+	* emul_chirp.c (chirp_emul_call_method): Add support for the
+	claim/release methods.
+	* (chirp_emul_exit): Add an optional exit status argument to
+	the exit method.  Makes it possible for chirp emul simulations
+	to abort upon an error.
+	* device.h, device.c (device_instance_claim,
+        device_instance_release): New methods for claiming and releasing
+	memory.
+	* hw_memory.c: add claim and release memory methods.
+	* hw_*: Use the claim memory method when allocating physical
+	memory.
+
+Thu Apr 18 23:38:10 1996  Andrew Cagney  <cagney@kremvax.highland.com.au>
+
+	* hw_nvram.c (hw_nvram_update_clock): Use the current not previous
+        time when updating the clock.
+
+	* hw_nvram.c: Tidy up documentation
+
 Fri May 24 10:08:10 1996  Michael Meissner  <meissner@tiktok.cygnus.com>
 
 	* configure.in (AC_STRUCT_ST_{BLKSIZE,BLOCKS,RDEV}): Use these
@@ -162,6 +337,42 @@ Sun Apr 14 21:32:41 1996  Andrew Cagney  <cagney@highland.com.au>
 	* device_table.c (stack_ioctl_callback): Return 0 status.
 	(vm_ioctl_callback): Ditto
 
+Sat Apr 13 00:00:24 1996  Andrew Cagney  <cagney@kremvax.highland.com.au>
+
+	* emul_netbsd.c (do_read): Correctly set the return value.
+	(do_getpid): Ditto.
+	(do_getuid): Ditto.
+	(do_geteuid): Ditto.
+	(do_dup): Ditto.
+	(do_getegid): Ditto.
+	(do_getgid): Ditto.
+	(do_sigprocmask): Ditto.
+	(do_umask): Ditto.
+	(do_dup2): Ditto.
+	(do_gettimeofday): Ditto.
+	(do_getrusage): Ditto.
+	(do_fstat): Ditto.
+	(do_stat): Ditto.
+	(do_lseek): Ditto.
+	(do___sysctl): Ditto.
+
+Fri Apr 12 20:56:47 1996  Andrew Cagney  <cagney@kremvax.highland.com.au>
+
+	* device_table.c (vm_ioctl_callback): Don't access the processor
+        registers directly, instead leave it to the caller to handle this.
+
+	* emul_netbsd.c (do_break): Which calls vm_ioctl_callback to
+        perform a break.  Pass in the new break value and set the
+        registers according to the result.
+
+	* emul_generic.c (emul_write_status): Change so that r3 contains
+        either status or errno and failure is indicated by SO.
+
+Thu Apr  4 23:03:38 1996  Andrew Cagney  <cagney@kremvax.highland.com.au>
+
+	* emul_bugapi.c (emul_bugapi_create): More strict check of OEA
+        address.
+
 Thu Apr  4 20:58:05 1996  Andrew Cagney  <cagney@highland.com.au>
 
 	* interrupts.h (interrupts): New structure contains state of
@@ -199,6 +410,25 @@ Fri Mar 29 20:17:17 1996  Andrew Cagney  <cagney@highland.com.au>
 
 	* Makefile.in (hw_iobus.o): New dependency.
 
+Fri Mar 29 12:17:58 1996  Andrew Cagney  <cagney@kremvax.highland.com.au>
+
+	* emul_bugapi.c (_os_emul_data): Add fields for output, input.
+        (emul_bugapi_create): Create input, output from /chosen/stdin and
+        /chosen/stdout.
+        (emul_bugapi_do_{read,write}): Switch to use device_instance
+        interface.
+        (emul_bugapi_instruction_call): Change calls to
+        emul_bugapi_do_{read,write} to pass device instance argument.
+
+Tue Mar 26 14:57:58 1996  Michael Meissner  <meissner@tiktok.cygnus.com>
+
+	* igen.c (idecode_switch_end): Fix 2/26 change so that an extra
+        default is not written out if a default was already written.
+
+	* psim.c (psim_{read,write}_register): Use sizeof unsigned_8 to
+        size cooked_buf, not sizeof natural_word, since floating point
+        registers are 8 bytes.
+
 Mon Mar 25 22:07:13 1996  Andrew Cagney  <cagney@kremvax.highland.com.au>
 
 	* configure: Regenerate with autoconf 2.9.
@@ -207,6 +437,11 @@ Thu Mar 21 00:14:26 1996  Andrew Cagney  <cagney@highland.com.au>
 
 	* device_table.h: Always include string headers.
 
+Thu Mar 21 00:06:09 1996  Andrew Cagney  <cagney@kremvax.highland.com.au>
+
+	* main.c (error): Be careful to not try to print out statistics
+        when the simulation was never created.
+
 Sun Mar 17 22:40:57 1996  Andrew Cagney  <cagney@highland.com.au>
 
 	* basics.h: Move the event queue's definition to here so that it
@@ -322,6 +557,11 @@ Sun Mar  3 03:10:22 1996  Andrew Cagney  <cagney@kremvax.highland.com.au>
 	* device.c (device_tree_print_device, device_tree_add_parsed):
         Remove references to phandle properties.
 
+Wed Feb 28 00:43:07 1996  Andrew Cagney - aka Noid  <cagney@highland.com.au>
+
+	* Makefile.in (corefile.o): missing dependency on device_table.h
+        etc.
+
 Tue Feb 27 23:59:35 1996  Andrew Cagney - aka Noid  <cagney@highland.com.au>
 
 	* device_table.h: Revamp device init callbacks so that they are a
@@ -339,6 +579,13 @@ Tue Feb 27 23:59:35 1996  Andrew Cagney - aka Noid  <cagney@highland.com.au>
 	* (address nee config_address): ditto.
 	* (interrupt): ditto.
 
+Mon Feb 26 21:11:20 1996  Andrew Cagney - aka Noid  <cagney@highland.com.au>
+
+	* igen.c (idecode_switch_end): Output a default entry when the
+        switch statement is perfect.  Firstly stops GCC complaining about
+        an incomplete switch and secondly it will be eliminated by a good
+        compiler any way.
+
 Mon Feb 26 22:47:15 1996  Andrew Cagney - aka Noid  <cagney@highland.com.au>
 
 	* Makefile.in (hw.h, hw.c): New targets. Create from the list of
@@ -362,3 +609,238 @@ Mon Feb 26 22:24:00 1996  Andrew Cagney - aka Noid  <cagney@highland.com.au>
 	* device_table.c: Delete the memory device (moved to hw_memory.c).
 
 	* hw_memory.c: New file.  Just an OpenBoot memory device.
+
+Wed Jan 17 21:47:34 1996  Andrew Cagney  <cagney@highland.com.au>
+
+	* device.c (device_init_address): New.  Split initialization into
+        two stages, address and address spaces
+	* device.c (device_init_data): New. ... and data or other work.
+        With out this, devices try to modify memory before it as been
+        attached.
+
+	* device.c (device_tree_init): Update to perform staged
+        initialization.
+
+	* device.c (device_init): Delete.
+
+Wed Jan 17 21:43:09 1996  Andrew Cagney  <cagney@highland.com.au>
+
+	* device_table.c (data_*): Rewrite to make heaver use of property
+        nodes. Allow initialization by different data types.
+	* device_table.c (htab_* pte_*): Rewrite to use properties.
+
+	* emul_chirp.c (emul_chirp_create): Use
+	* emul_bugapi.c (emul_bugapi_create): Ditto
+	* emul_netbsd.c (emul_netbsd_create): Ditto
+
+Wed Jan 17 21:24:50 1996  Andrew Cagney  <cagney@highland.com.au>
+
+	* emul_generic.c (emul_add_tree_options): Annotate existing tree
+        with options that haven't yet been specified.
+	* emul_generic.c (emul_add_tree_hardware): Annotate existing tree
+        with demo devices and properties.
+
+	* emul_chirp.c (emul_chirp_create): Update to use new
+        device_tree_add_parsed call and additional information now
+        included in the device tree.  Use emul_add_tree* functions to add
+        any missing details.
+	* emul_bugapi.c (emul_bugapi_create): Ditto
+	* emul_netbsd.c (emul_netbsd_create): Ditto
+
+Wed Jan 17 21:18:27 1996  Andrew Cagney  <cagney@highland.com.au>
+
+	* device.c (device_instance_create): New. Create/delete and
+        operate on instances of a device.
+	* device.c (device_instance_delete): Ditto
+	* device.c (device_instance_read): Ditto
+	* device.c (device_instance_write): Ditto
+	* device.c (device_instance_seek): Ditto
+	* device.c (device_instance_data): Ditto
+	* device.c (device_instance_name): Ditto
+	* device.c (device_instance_path): Ditto
+
+	* emul_chirp.c (chirp_emul_open): Implement using device_instance.
+	* emul_chirp.c (chirp_emul_close): Ditto
+	* emul_chirp.c (chirp_emul_read): Ditto
+	* emul_chirp.c (chirp_emul_write): Ditto
+	* emul_chirp.c (chirp_emul_seek): Ditto
+
+	* emul_chirp.c (chirp_read_t2h_args): Read arguments from device.
+        Being careful to convert all from target to host byte order.
+	* emul_chirp.c (chirp_write_h2t_args): Converse.
+
+Wed Jan 17 20:07:15 1996  Andrew Cagney  <cagney@highland.com.au>
+
+	* device.c (device_tree_add_parsed): New.  Rewrite code to add
+        devices to the device tree so that a single printf style function
+        is used.
+
+	* device.c (device_tree_add_*): Delete. Replaced by above.
+
+	* device.c (split_device_specifier): Functions to manipulate a
+        device specifier (path) breaking it into its components
+	* device.c (split_property_specifier): Ditto
+	* device.c (split_device_name): Ditto
+	* device.c (split_find_device): Ditto
+
+	* device.c (scan_*): Delete
+
+	* device.c (device_tree_find_device): Rewrite to use above.
+	* device.c (device_add_property): Ditto
+
+Wed Jan 17 19:51:56 1996  Andrew Cagney  <cagney@highland.com.au>
+
+	* psim.c(psim_options): Parse the psim options, installing their
+        value in the device tree.  Options are now first entered into a
+        device tree and then extracted out again when needed.  This allows
+        greater flexability in configuration.
+
+	* psim.c (psim_tree): Returns a basic device tree ready for
+        parsing by psim_options.
+	* psim.c (psim_usage): New.  Give usage to varing levels of detail
+        according to the verbosity.  In turn output device and trace
+        usage.
+
+	* main.c (main): Update to use new system
+	* sim_calls.c (sim_open, sim_do_command): Ditto
+
+	* psim.c (psim_options): Add `r' option - ram size.
+	* psim.c (psim_options): Add `o' option - openboot tree entry.
+	* psim.c (psim_options): Add `h'/`H' options - more help.
+
+	* debug.c (trace_usage): Add more detailed help.
+	* device.c (device_usage): New. Output help including a list of
+        the devices currently available in the device table.
+	* device_table.c: Add usage operator to each device.
+
+	* corefile.c (core_create, core_device_create): Adjust so that the
+        core device is created earlier for psim_tree().  Core can later be
+        created from it.
+
+	* psim.c (psim_create): Update to handle above way of creating
+        things.  Extract all information from the device tree.
+
+	* device_tree.c (trace_*): New device node, its properties are
+        used to set the value of the trace options.  Init this device (in
+        psim_options) when ever the options are updated.
+
+Wed Jan 17 19:46:07 1996  Andrew Cagney  <cagney@highland.com.au>
+
+	* debug.h: Add trace_print_info, trace_print_device_tree and
+        trace_dump_device_tree.  The first is a replacement for the
+        variable `print_info' found in main.c and sim_calls.c.  The latter
+        two enable the dumping of the entire device tree.
+
+	* debug.c: Add to trace_description table.
+
+	* main.c (main): Use above trace instead of local variable
+	* sim_calls.c (sim_close): Ditto
+
+	* device.c (device_tree_print_device): New.  Prints the device
+        tree in a format that is consistent with what can be parsed by the
+        device tree load from file code.
+
+	* psim.c (psim_create): Dump device tree if enabled. If nump
+        selected, exit psim immediatly.
+
+Wed Jan 17 19:36:52 1996  Andrew Cagney  <cagney@highland.com.au>
+
+	* corefile-n.h (core_map_read_N): When mapping from an address to
+        a device, do not subtract the devices base.  The device its self
+        can do this.  Brings the behavour into line with OpenBoot.
+	* corefile-n.h (core_map_write_N): Ditto
+	* corefile.c (core_map_read_buffer): Ditto
+	* corefile.c (core_map_write_buffer): Ditto
+
+	* device_table.c (console_io_read_buffer_callback): Adjust to
+        handle biased address.
+	* device_table.c (console_io_write_buffer_callback): Ditto
+
+Wed Jan 17 18:36:09 1996  Andrew Cagney  <cagney@highland.com.au>
+
+	* device.c (attach_device_interrupt_edge): New. Interrupt model
+        did not allow interrupts to be wired up as a general net (edges).
+        Re-implement so that interrupt events can be passed to multiple
+        controllers and interrupt controllers can further propogate
+        interrupt events.
+
+	* device.c (attach_device_interrupt_edge) : New, Ditto
+	* device.c (detach_device_interrupt_edge) : New, Ditto
+	* device.c (clean_device_interrupt_edges) : New, Ditto
+	* device.c (device_interrupt_event) : New, Ditto
+	* device.c (device_interrupt_attach) : New, Ditto
+	* device.c (device_interrupt_detach) : New, Ditto
+	* device.c (device_child_interrupt_attach) : New, Ditto
+	* device.c (device_child_interrupt_detach) : New, Ditto
+
+	* device.c (device_attach_interrupt) : Delete old
+	* device.c (device_detach_interrupt) : Delete old
+	* device.c (device_interrupt) : Delete old
+	* device.c (device_interrupt_ack) : Delete old
+
+	* device_table.c (unimp_*) : Update to match
+	
+        * device_table.c (icu_io_write_buffer_callback) : Update to use
+        interface.
+	* device_table.c (icu_interrupt_event_callback) : Ditto
+
+Wed Jan 17 18:18:40 1996  Andrew Cagney  <cagney@highland.com.au>
+
+	* device.c (external_to_device) : New function that provides a
+        standard mapping between a devices internal representation (a
+        pointer) and its external (or what is passed to a client)
+        representation (a phandle).  Implement using the cap object
+        attached to the root node.
+
+	* device.c (device_to_external) : Ditto
+	* device.c (external_to_device_instance) : Ditto but for ihandle
+        and device instance.
+	* device.c (device_instance_to_external) : Ditto
+
+	* Makefile (device.o): Add dependency on cap.
+
+	* emul_chirp.c (struct _emul_chirp_data) : Elimate use of cap. Code
+        needing to translate between internal and external representations
+        changed to use the external_to_device et.al. device operations.
+	* emul_chirp.c (chirp_emul_*) : Ditto
+
+	* Makefile (emul_chirp.o): Remove dependency on cap
+
+Sat Jan  6 10:13:26 1996  Andrew Cagney - aka Noid  <cagney@highland.com.au>
+
+	* emul_chirp.c (map_over_chirp_note): Tighten up (and fix) checks
+        on OpenBoot note section.
+
+Fri Jan  5 20:28:53 1996  Andrew Cagney  <cagney@hignland.com.au>
+
+	* emul_generic.c (emul_write_buffer): Use vm faulting byte
+ 	read/write calls for buffer transfers.  This will cause a fault to
+ 	occure if the transfer fails.  CHRP catches the fault while the
+ 	others suffer the consequences.
+        (emul_read_buffer): Ditto.
+        (emul_write_word): Ditto.
+        (emul_read_word): Ditto.
+        (emul_read_string): Ditto.
+
+Fri Jan  5 18:55:34 1996  Andrew Cagney  <cagney@highland.com.au>
+
+	* emul_chirp.c (emul_chirp_create, emul_chirp_instruction_call),
+ 	emul_generic (emul_blr_instruction): Use a real blr instruction to
+ 	return from a client service call.
+
+	* emul_chirp.c (services): Add all OpenBoot services to table.
+
+	* emul_generic.h, emul_bugapi.c (emul_bugapi_create), emul_chirp.c
+ 	(emul_chirp_create) : Use names instead of numbers for
+ 	instructions being stored in memory.
+
+Fri Jan  5 18:52:28 1996  Andrew Cagney  <cagney@highland.com.au>
+
+	* Makefile.in (maintainer-clean): Remove .log, core and *.core
+ 	(From NetBSD) files.
+
+Wed May 29 22:57:40 1996  Andrew Cagney  <cagney@kremvax.highland.com.au>
+
+	* ChangeLog.00, ChangeLog: ChangeLog from gdb-4.16 becomes
+        ChangeLog.00
+
diff --git a/sim/ppc/hw_disk.c b/sim/ppc/hw_disk.c
new file mode 100644
index 0000000..eb4d236
--- /dev/null
+++ b/sim/ppc/hw_disk.c
@@ -0,0 +1,255 @@
+/*  This file is part of the program psim.
+    
+    Copyright (C) 1994-1996, Andrew Cagney <cagney@highland.com.au>
+    
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+    
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+    
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+    
+    */
+
+
+#ifndef _HW_DISK_C_
+#define _HW_DISK_C_
+
+#include "device_table.h"
+
+#include "pk.h"
+
+#include <stdio.h>
+
+
+/* DEVICE
+   
+   cdrom - readable block device
+
+   disk - readable block device that should be writeable
+   
+   floppy - readable block device that should be writeable
+
+   DESCRIPTION
+   
+   Block I/O devices that model the behavour of a fixed or removable
+   disk device.
+
+   Creating an instance of this device with no arguments will provide
+   access to primative read/write operators.  If arguments are
+   specified then the disk-label package is used to perform abstract
+   disk I/O. The disk-label package will then use this devices
+   primatives.
+
+   For hardware I/O, this device would normally be attached to a
+   parent `bus' and that bus would use the I/O methods to read and
+   write raw data.  The bus might actually be a SCSI or IDE device.
+   It is assumed that the parent bus can take care of DMA.
+
+   PROPERTIES
+   
+   reg = <address> (required)
+
+   <address> is parent bus dependant.
+
+   device_type = "block"
+
+   name = "disk" | "cdrom" | "fd"
+
+   file = <file-name> (required)
+
+   The name of the file that contains the disk image.
+
+   */
+
+typedef struct _hw_disk_device {
+  const char *name;
+  int read_only;
+  unsigned_word size;
+  FILE *image;
+} hw_disk_device;
+
+typedef struct _hw_disk_instance {
+  long pos;
+  hw_disk_device *disk;
+} hw_disk_instance;
+
+
+static void
+hw_disk_init_address(device *me)
+{
+  hw_disk_device *disk = device_data(me);
+  generic_device_init_address(me);
+  if (disk->image != NULL)
+    fclose(disk->image);
+  disk->name = device_find_string_property(me, "file");
+  if (strcmp(device_name(me), "disk") == 0) {
+    disk->read_only = 0;
+    disk->image = fopen(disk->name, "r+");
+  }
+  else {
+    disk->read_only = 1;
+    disk->image = fopen(disk->name, "r");
+  }
+  if (disk->image == NULL) {
+    perror(device_name(me));
+    device_error(me, "open %s failed\n", disk->name);
+  }
+}
+
+static unsigned
+hw_disk_io_read_buffer(device *me,
+		       void *dest,
+		       int space,
+		       unsigned_word addr,
+		       unsigned nr_bytes,
+		       cpu *processor,
+		       unsigned_word cia)
+{
+  hw_disk_device *disk = device_data(me);
+  if (nr_bytes == 0)
+    return 0;
+  if (addr + nr_bytes > disk->size)
+    return 0;
+  if (fseek(disk->image, addr, SEEK_SET) < 0)
+    return 0;
+  if (fread(dest, nr_bytes, 1, disk->image) != 1)
+    return 0;
+  return nr_bytes;
+}
+
+
+static unsigned
+hw_disk_io_write_buffer(device *me,
+			const void *source,
+			int space,
+			unsigned_word addr,
+			unsigned nr_bytes,
+			cpu *processor,
+			unsigned_word cia)
+{
+  hw_disk_device *disk = device_data(me);
+  if (disk->read_only)
+    return 0;
+  if (nr_bytes == 0)
+    return 0;
+  if (addr + nr_bytes > disk->size)
+    return 0;
+  if (fseek(disk->image, addr, SEEK_SET) < 0)
+    return 0;
+  if (fwrite(source, nr_bytes, 1, disk->image) != 1)
+    return 0;
+  return nr_bytes;
+}
+
+
+/* instances of the hw_disk device */
+
+static void
+hw_disk_instance_delete(device_instance *instance)
+{
+  hw_disk_instance *data = device_instance_data(instance);
+  zfree(data);
+}
+
+static int
+hw_disk_instance_read(device_instance *instance,
+		      void *buf,
+		      unsigned_word len)
+{
+  hw_disk_instance *data = device_instance_data(instance);
+  if (fseek(data->disk->image, data->pos, SEEK_SET) < 0)
+    return -1;
+  if (fread(buf, len, 1, data->disk->image) != 1)
+    return -1;
+  data->pos = ftell(data->disk->image);
+  return len;
+}
+
+static int
+hw_disk_instance_write(device_instance *instance,
+		       const void *buf,
+		       unsigned_word len)
+{
+  hw_disk_instance *data = device_instance_data(instance);
+  if (data->disk->read_only)
+    return -1;
+  if (fseek(data->disk->image, data->pos, SEEK_SET) < 0)
+    return -1;
+  if (fwrite(buf, len, 1, data->disk->image) != 1)
+    return -1;
+  data->pos = ftell(data->disk->image);
+  return len;
+}
+
+static int
+hw_disk_instance_seek(device_instance *instance,
+		      unsigned_word pos_hi,
+		      unsigned_word pos_lo)
+{
+  hw_disk_instance *data = device_instance_data(instance);
+  data->pos = pos_lo;
+  return 0;
+}
+
+static const device_instance_callbacks hw_disk_instance_callbacks = {
+  hw_disk_instance_delete,
+  hw_disk_instance_read,
+  hw_disk_instance_write,
+  hw_disk_instance_seek,
+};
+
+static device_instance *
+hw_disk_create_instance(device *me,
+			const char *path,
+			const char *args)
+{
+  device_instance *disk_instance;
+  hw_disk_device *disk = device_data(me);
+  hw_disk_instance *data = ZALLOC(hw_disk_instance);
+  data->disk = disk;
+  data->pos = 0;
+  disk_instance = device_create_instance_from(me, NULL,
+					      data,
+					      path, args,
+					      &hw_disk_instance_callbacks);
+  return pk_disklabel_create_instance(disk_instance, args);
+}
+
+static device_callbacks const hw_disk_callbacks = {
+  { hw_disk_init_address, NULL },
+  { NULL, }, /* address */
+  { hw_disk_io_read_buffer,
+      hw_disk_io_write_buffer, },
+  { NULL, }, /* DMA */
+  { NULL, }, /* interrupt */
+  { NULL, }, /* unit */
+  hw_disk_create_instance,
+};
+
+
+static void *
+hw_disk_create(const char *name,
+	       const device_unit *unit_address,
+	       const char *args,
+	       device *parent)
+{
+  /* create the descriptor */
+  hw_disk_device *hw_disk = ZALLOC(hw_disk_device);
+  return hw_disk;
+}
+
+
+const device_descriptor hw_disk_device_descriptor[] = {
+  { "disk", hw_disk_create, &hw_disk_callbacks },
+  { NULL },
+};
+
+#endif /* _HW_DISK_C_ */
diff --git a/sim/ppc/hw_init.c b/sim/ppc/hw_init.c
new file mode 100644
index 0000000..6d51c7e
--- /dev/null
+++ b/sim/ppc/hw_init.c
@@ -0,0 +1,569 @@
+/*  This file is part of the program psim.
+    
+    Copyright (C) 1994-1996, Andrew Cagney <cagney@highland.com.au>
+    
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+    
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+    
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+    
+    */
+
+
+#ifndef _HW_INIT_C_
+#define _HW_INIT_C_
+
+#include "device_table.h"
+#include "bfd.h"
+#include "psim.h"
+
+
+/* DMA a file into memory */
+static int
+dma_file(device *me,
+	 const char *file_name,
+	 unsigned_word addr)
+{
+  int count;
+  int inc;
+  FILE *image;
+  char buf[1024];
+
+  /* get it open */
+  image = fopen(file_name, "r");
+  if (image == NULL)
+    return -1;
+
+  /* read it in slowly */
+  count = 0;
+  while (1) {
+    inc = fread(buf, 1, sizeof(buf), image);
+    if (feof(image) || ferror(image))
+      break;
+    if (device_dma_write_buffer(device_parent(me),
+				buf,
+				0 /*address-space*/,
+				addr+count,
+				inc /*nr-bytes*/,
+				1 /*violate ro*/) != inc) {
+      fclose(image);
+      return -1;
+    }
+    count += inc;
+  }
+
+  /* close down again */
+  fclose(image);
+
+  return count;
+}
+
+
+/* DEVICE
+
+   file - load a file into memory
+
+   DESCRIPTION
+
+   Loads the entire contents of <file-name> into memory at starting at
+   <real-address>.  Assumes that memory exists for the load.
+
+   PROPERTIES
+
+   file-name = <string>
+
+   Name of the file to be loaded into memory
+
+   real-address = <integer>
+
+   Real address at which the file is to be loaded */
+
+static void
+hw_file_init_data_callback(device *me)
+{
+  int count;
+  const char *file_name = device_find_string_property(me, "file-name");
+  unsigned_word addr = device_find_integer_property(me, "real-address");
+  /* load the file */
+  count = dma_file(me, file_name, addr);
+  if (count < 0)
+    device_error(me, "Problem loading file %s\n", file_name);
+}
+
+
+static device_callbacks const hw_file_callbacks = {
+  { NULL, hw_file_init_data_callback, },
+  { NULL, }, /* address */
+  { NULL, }, /* IO */
+  { NULL, }, /* DMA */
+  { NULL, }, /* interrupt */
+  { NULL, }, /* unit */
+};
+
+
+/* DEVICE
+
+   data - initialize a memory location
+
+   DESCRIPTION
+
+   A word sized quantity of data is written into memory, using the
+   targets byte ordering, at the specified memory location.
+
+   In the future this device will be extended so that it supports
+   initialization using other data types (eg array, ...)
+
+   PROPERTIES
+
+   data = <int>
+
+   Integer value to be loaded into memory
+
+   real-address = <integer>
+
+   Start address for the data. */
+
+
+static void
+hw_data_init_data_callback(device *me)
+{
+  unsigned_word addr = device_find_integer_property(me, "real-address");
+  const device_property *data = device_find_property(me, "data");
+  if (data == NULL)
+    device_error(me, "missing property <data>\n");
+  switch (data->type) {
+  case integer_property:
+    {
+      unsigned32 buf = device_find_integer_property(me, "data");
+      H2T(buf);
+      if (device_dma_write_buffer(device_parent(me),
+				  &buf,
+				  0 /*address-space*/,
+				  addr,
+				  sizeof(buf), /*nr-bytes*/
+				  1 /*violate ro*/) != sizeof(buf))
+	device_error(me, "Problem storing integer 0x%x at 0x%lx\n",
+		     (unsigned)buf, (unsigned long)addr);
+    }
+    break;
+  default:
+    device_error(me, "Write of this data is not yet implemented\n");
+    break;
+  }
+}
+
+
+static device_callbacks const hw_data_callbacks = {
+  { NULL, hw_data_init_data_callback, },
+  { NULL, }, /* address */
+  { NULL, }, /* IO */
+  { NULL, }, /* DMA */
+  { NULL, }, /* interrupt */
+  { NULL, }, /* unit */
+};
+
+
+/* DEVICE
+
+   load-binary - load binary segments into memory
+
+   DESCRIPTION
+
+   Each loadable segment of the specified binary is loaded into memory
+   at its required address.  It is assumed that the memory at those
+   addresses already exists.
+
+   This device is normally used to load an executable into memory as
+   part of real mode simulation.
+
+   PROPERTIES
+
+   file-name = <string>
+
+   Name of the binary to be loaded.
+
+   DEVICE
+
+   map-binary - map the binary into the users address space
+
+   DESCRIPTION
+   
+   Similar to load-binary except that memory for each segment is
+   created before the corresponding data for the segment is loaded.
+
+   This device is normally used to load an executable into a user mode
+   simulation.
+
+   PROPERTIES
+
+   file-name = <string>
+
+   Name of the binary to be loaded.
+
+   */
+
+static void
+update_for_binary_section(bfd *abfd,
+			  asection *the_section,
+			  PTR obj)
+{
+  unsigned_word section_vma;
+  unsigned_word section_size;
+  access_type access;
+  device *me = (device*)obj;
+
+  /* skip the section if no memory to allocate */
+  if (! (bfd_get_section_flags(abfd, the_section) & SEC_ALLOC))
+    return;
+
+  /* check/ignore any sections of size zero */
+  section_size = bfd_get_section_size_before_reloc(the_section);
+  if (section_size == 0)
+    return;
+
+  /* find where it is to go */
+  section_vma = bfd_get_section_vma(abfd, the_section);
+
+  DTRACE(binary,
+	 ("name=%-7s, vma=0x%.8lx, size=%6ld, flags=%3lx(%s%s%s%s%s )\n",
+	  bfd_get_section_name(abfd, the_section),
+	  (long)section_vma,
+	  (long)section_size,
+	  (long)bfd_get_section_flags(abfd, the_section),
+	  bfd_get_section_flags(abfd, the_section) & SEC_LOAD ? " LOAD" : "",
+	  bfd_get_section_flags(abfd, the_section) & SEC_CODE ? " CODE" : "",
+	  bfd_get_section_flags(abfd, the_section) & SEC_DATA ? " DATA" : "",
+	  bfd_get_section_flags(abfd, the_section) & SEC_ALLOC ? " ALLOC" : "",
+	  bfd_get_section_flags(abfd, the_section) & SEC_READONLY ? " READONLY" : ""
+	  ));
+
+  /* If there is an .interp section, it means it needs a shared library interpreter.  */
+  if (strcmp(".interp", bfd_get_section_name(abfd, the_section)) == 0)
+    error("Shared libraries are not yet supported.\n");
+
+  /* determine the devices access */
+  access = access_read;
+  if (bfd_get_section_flags(abfd, the_section) & SEC_CODE)
+    access |= access_exec;
+  if (!(bfd_get_section_flags(abfd, the_section) & SEC_READONLY))
+    access |= access_write;
+
+  /* if a map, pass up a request to create the memory in core */
+  if (strncmp(device_name(me), "map-binary", strlen("map-binary")) == 0)
+    device_attach_address(device_parent(me),
+			  device_name(me),
+			  attach_raw_memory,
+			  0 /*address space*/,
+			  section_vma,
+			  section_size,
+			  access,
+			  me);
+
+  /* if a load dma in the required data */
+  if (bfd_get_section_flags(abfd, the_section) & SEC_LOAD) {
+    void *section_init = zalloc(section_size);
+    if (!bfd_get_section_contents(abfd,
+				  the_section,
+				  section_init, 0,
+				  section_size)) {
+      bfd_perror("binary");
+      device_error(me, "load of data failed");
+      return;
+    }
+    if (device_dma_write_buffer(device_parent(me),
+				section_init,
+				0 /*space*/,
+				section_vma,
+				section_size,
+				1 /*violate_read_only*/)
+	!= section_size)
+      device_error(me, "broken transfer\n");
+    zfree(section_init); /* only free if load */
+  }
+}
+
+static void
+hw_binary_init_data_callback(device *me)
+{
+  /* get the file name */
+  const char *file_name = device_find_string_property(me, "file-name");
+  bfd *image;
+
+  /* open the file */
+  image = bfd_openr(file_name, NULL);
+  if (image == NULL) {
+    bfd_perror("binary");
+    device_error(me, "Failed to open file %s\n", file_name);
+  }
+
+  /* check it is valid */
+  if (!bfd_check_format(image, bfd_object)) {
+    bfd_close(image);
+    device_error(me, "The file %s has an invalid binary format\n", file_name);
+  }
+
+  /* and the data sections */
+  bfd_map_over_sections(image,
+			update_for_binary_section,
+			(PTR)me);
+
+  bfd_close(image);
+}
+
+
+static device_callbacks const hw_binary_callbacks = {
+  { NULL, hw_binary_init_data_callback, },
+  { NULL, }, /* address */
+  { NULL, }, /* IO */
+  { NULL, }, /* DMA */
+  { NULL, }, /* interrupt */
+  { NULL, }, /* unit */
+};
+
+
+/* DEVICE
+
+   stack - create an initial stack frame in memory
+
+   DESCRIPTION
+
+   Creates a stack frame of the specified type in memory.
+
+   Due to the startup sequence gdb uses when commencing a simulation,
+   it is not possible for the data to be placed on the stack to be
+   specified as part of the device tree.  Instead the arguments to be
+   pushed onto the stack are specified using an IOCTL call.
+
+   The IOCTL takes the additional arguments:
+
+   | unsigned_word stack_end -- where the stack should come down from
+   | char **argv -- ...
+   | char **envp -- ...
+
+   PROPERTIES
+
+   stack-type = <string>
+
+   The form of the stack frame that is to be created.
+
+   */
+
+static int
+sizeof_argument_strings(char **arg)
+{
+  int sizeof_strings = 0;
+
+  /* robust */
+  if (arg == NULL)
+    return 0;
+
+  /* add up all the string sizes (padding as we go) */
+  for (; *arg != NULL; arg++) {
+    int len = strlen(*arg) + 1;
+    sizeof_strings += ALIGN_8(len);
+  }
+
+  return sizeof_strings;
+}
+
+static int
+number_of_arguments(char **arg)
+{
+  int nr;
+  if (arg == NULL)
+    return 0;
+  for (nr = 0; *arg != NULL; arg++, nr++);
+  return nr;
+}
+
+static int
+sizeof_arguments(char **arg)
+{
+  return ALIGN_8((number_of_arguments(arg) + 1) * sizeof(unsigned_word));
+}
+
+static void
+write_stack_arguments(device *me,
+		      char **arg,
+		      unsigned_word start_block,
+		      unsigned_word end_block,
+		      unsigned_word start_arg,
+		      unsigned_word end_arg)
+{
+  DTRACE(stack,
+	("write_stack_arguments(device=%s, arg=0x%lx, start_block=0x%lx, end_block=0x%lx, start_arg=0x%lx, end_arg=0x%lx)\n",
+	 device_name(me), (long)arg, (long)start_block, (long)end_block, (long)start_arg, (long)end_arg));
+  if (arg == NULL)
+    device_error(me, "Attempt to write a null array onto the stack\n");
+  /* only copy in arguments, memory is already zero */
+  for (; *arg != NULL; arg++) {
+    int len = strlen(*arg)+1;
+    unsigned_word target_start_block;
+    DTRACE(stack,
+	  ("write_stack_arguments() write %s=%s at %s=0x%lx %s=0x%lx %s=0x%lx\n",
+	   "**arg", *arg, "start_block", (long)start_block,
+	   "len", (long)len, "start_arg", (long)start_arg));
+    if (psim_write_memory(device_system(me), 0, *arg,
+			  start_block, len,
+			  0/*violate_readonly*/) != len)
+      device_error(me, "Write of **arg (%s) at 0x%lx of stack failed\n",
+		   *arg, (unsigned long)start_block);
+    target_start_block = H2T_word(start_block);
+    if (psim_write_memory(device_system(me), 0, &target_start_block,
+			  start_arg, sizeof(target_start_block),
+			  0) != sizeof(target_start_block))
+      device_error(me, "Write of *arg onto stack failed\n");
+    start_block += ALIGN_8(len);
+    start_arg += sizeof(start_block);
+  }
+  start_arg += sizeof(start_block); /*the null at the end*/
+  if (start_block != end_block
+      || ALIGN_8(start_arg) != end_arg)
+    device_error(me, "Probable corrpution of stack arguments\n");
+  DTRACE(stack, ("write_stack_arguments() = void\n"));
+}
+
+static void
+create_ppc_elf_stack_frame(device *me,
+			   unsigned_word bottom_of_stack,
+			   char **argv,
+			   char **envp)
+{
+  /* fixme - this is over aligned */
+
+  /* information block */
+  const unsigned sizeof_envp_block = sizeof_argument_strings(envp);
+  const unsigned_word start_envp_block = bottom_of_stack - sizeof_envp_block;
+  const unsigned sizeof_argv_block = sizeof_argument_strings(argv);
+  const unsigned_word start_argv_block = start_envp_block - sizeof_argv_block;
+
+  /* auxiliary vector - contains only one entry */
+  const unsigned sizeof_aux_entry = 2*sizeof(unsigned_word); /* magic */
+  const unsigned_word start_aux = start_argv_block - ALIGN_8(sizeof_aux_entry);
+
+  /* environment points (including null sentinal) */
+  const unsigned sizeof_envp = sizeof_arguments(envp);
+  const unsigned_word start_envp = start_aux - sizeof_envp;
+
+  /* argument pointers (including null sentinal) */
+  const int argc = number_of_arguments(argv);
+  const unsigned sizeof_argv = sizeof_arguments(argv);
+  const unsigned_word start_argv = start_envp - sizeof_argv;
+
+  /* link register save address - alligned to a 16byte boundary */
+  const unsigned_word top_of_stack = ((start_argv
+				       - 2 * sizeof(unsigned_word))
+				      & ~0xf);
+
+  /* install arguments on stack */
+  write_stack_arguments(me, envp,
+			start_envp_block, bottom_of_stack,
+			start_envp, start_aux);
+  write_stack_arguments(me, argv,
+			start_argv_block, start_envp_block,
+			start_argv, start_envp);
+
+  /* set up the registers */
+  psim_write_register(device_system(me), -1,
+		      &top_of_stack, "sp", cooked_transfer);
+  psim_write_register(device_system(me), -1,
+		      &argc, "r3", cooked_transfer);
+  psim_write_register(device_system(me), -1,
+		      &start_argv, "r4", cooked_transfer);
+  psim_write_register(device_system(me), -1,
+		      &start_envp, "r5", cooked_transfer);
+  psim_write_register(device_system(me), -1,
+		      &start_aux, "r6", cooked_transfer);
+}
+
+static void
+create_ppc_aix_stack_frame(device *me,
+			   unsigned_word bottom_of_stack,
+			   char **argv,
+			   char **envp)
+{
+  unsigned_word core_envp;
+  unsigned_word core_argv;
+  unsigned_word core_argc;
+  unsigned_word core_aux;
+  unsigned_word top_of_stack;
+
+  /* cheat - create an elf stack frame */
+  create_ppc_elf_stack_frame(me, bottom_of_stack, argv, envp);
+  
+  /* extract argument addresses from registers */
+  psim_read_register(device_system(me), 0,
+		     &top_of_stack, "r1", cooked_transfer);
+  psim_read_register(device_system(me), 0,
+		     &core_argc, "r3", cooked_transfer);
+  psim_read_register(device_system(me), 0,
+		     &core_argv, "r4", cooked_transfer);
+  psim_read_register(device_system(me), 0,
+		     &core_envp, "r5", cooked_transfer);
+  psim_read_register(device_system(me), 0,
+		     &core_aux, "r6", cooked_transfer);
+
+  /* extract arguments from registers */
+  device_error(me, "Unfinished procedure create_ppc_aix_stack_frame\n");
+}
+
+
+
+static int
+hw_stack_ioctl_callback(device *me,
+			cpu *processor,
+			unsigned_word cia,
+			va_list ap)
+{
+  unsigned_word stack_pointer;
+  const char *stack_type;
+  char **argv;
+  char **envp;
+  stack_pointer = va_arg(ap, unsigned_word);
+  argv = va_arg(ap, char **);
+  envp = va_arg(ap, char **);
+  DTRACE(stack,
+	 ("stack_ioctl_callback(me=0x%lx:%s processor=0x%lx cia=0x%lx argv=0x%lx envp=0x%lx)\n",
+	  (long)me, device_name(me), (long)processor, (long)cia, (long)argv, (long)envp));
+  stack_type = device_find_string_property(me, "stack-type");
+  if (strcmp(stack_type, "ppc-elf") == 0)
+    create_ppc_elf_stack_frame(me, stack_pointer, argv, envp);
+  else if (strcmp(stack_type, "ppc-xcoff") == 0)
+    create_ppc_aix_stack_frame(me, stack_pointer, argv, envp);
+  else if (strcmp(stack_type, "none") != 0)
+    device_error(me, "Unknown initial stack frame type %s\n", stack_type);
+  DTRACE(stack, 
+	 ("stack_ioctl_callback() = void\n"));
+  return 0;
+}
+
+static device_callbacks const hw_stack_callbacks = {
+  { NULL, },
+  { NULL, }, /* address */
+  { NULL, }, /* IO */
+  { NULL, }, /* DMA */
+  { NULL, }, /* interrupt */
+  { NULL, }, /* unit */
+  NULL, /* instance */
+  hw_stack_ioctl_callback,
+};
+
+const device_descriptor hw_init_device_descriptor[] = {
+  { "file", NULL, &hw_file_callbacks },
+  { "data", NULL, &hw_data_callbacks },
+  { "load-binary", NULL, &hw_binary_callbacks },
+  { "map-binary", NULL, &hw_binary_callbacks },
+  { "stack", NULL, &hw_stack_callbacks },
+  { NULL },
+};
+
+#endif _HW_INIT_C_
diff --git a/sim/ppc/hw_register.c b/sim/ppc/hw_register.c
new file mode 100644
index 0000000..4c812b1
--- /dev/null
+++ b/sim/ppc/hw_register.c
@@ -0,0 +1,125 @@
+/*  This file is part of the program psim.
+    
+    Copyright (C) 1994-1996, Andrew Cagney <cagney@highland.com.au>
+    
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+    
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+    
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+    
+    */
+
+
+#ifndef _HW_REGISTER_C_
+#define _HW_REGISTER_C_
+
+#include "device_table.h"
+#include <stdlib.h>
+#include "psim.h"
+
+/* DEVICE
+
+   register - dummy device to initialize processor registers
+
+   DESCRIPTION
+
+   The properties of this device are used, during initialization, to
+   specify the initial value of various processor registers.  The
+   property name specifying the register to be initialized with the
+   special form <cpu-nr>.<register> being used to initialize a
+   specific processor's register (eg 0.pc).
+
+   Because, when the device tree is created, overriding properties are
+   entered into the tree before any default values, this device must
+   initialize registers in newest (default) to oldest (overriding)
+   property order.
+
+   The actual registers (for a given target) are defined in the file
+   registers.c.
+
+   This device is normally a child of the /openprom/init node.
+
+   EXAMPLE
+
+   Given a device tree containing the entry:
+
+   |	/openprom/init/register/pc 0xfff00cf0
+
+   then specifying the command line option:
+
+   |	-o '/openprom/init/register/pc 0x0'
+
+   would override the initial value of processor zero's program
+   counter.  The resultant device tree tree containing:
+
+   |	/openprom/init/register/0.pc 0x0
+   |	/openprom/init/register/pc 0xfff00cf0
+
+   and would be processed last to first resulting in the sequence: set
+   all program counters to 0xfff00cf0; set processor zero's program
+   counter to zero. */
+
+static void
+do_register_init(device *me,
+		 const device_property *prop)
+{
+  psim *system = device_system(me);
+  if (prop != NULL) {
+    const char *name = prop->name;
+    unsigned32 value = device_find_integer_property(me, name);
+    int processor;
+
+    do_register_init(me, device_next_property(prop));
+
+    if (strchr(name, '.') == NULL) {
+      processor = -1;
+      DTRACE(register, ("%s=0x%lx\n", name, (unsigned long)value));
+    }
+    else {
+      char *end;
+      processor = strtoul(name, &end, 0);
+      ASSERT(end[0] == '.');
+      name = end+1;
+      DTRACE(register, ("%d.%s=0x%lx\n", processor, name,
+			(unsigned long)value));
+    }    
+    psim_write_register(system, processor, /* all processors */
+			&value,
+			name,
+			cooked_transfer);
+  }
+}
+		 
+
+static void
+register_init_data_callback(device *me)
+{
+  const device_property *prop = device_find_property(me, NULL);
+  do_register_init(me, prop);
+}
+
+
+static device_callbacks const register_callbacks = {
+  { NULL, register_init_data_callback, },
+  { NULL, }, /* address */
+  { NULL, }, /* IO */
+  { NULL, }, /* DMA */
+  { NULL, }, /* interrupt */
+  { NULL, }, /* unit */
+};
+
+const device_descriptor hw_register_device_descriptor[] = {
+  { "register", NULL, &register_callbacks },
+  { NULL },
+};
+
+#endif _HW_REGISTER_C_
diff --git a/sim/ppc/hw_vm.c b/sim/ppc/hw_vm.c
new file mode 100644
index 0000000..df861d4
--- /dev/null
+++ b/sim/ppc/hw_vm.c
@@ -0,0 +1,269 @@
+/*  This file is part of the program psim.
+    
+    Copyright (C) 1994-1996, Andrew Cagney <cagney@highland.com.au>
+    
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+    
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+    
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+    
+    */
+
+
+#ifndef _HW_VM_C_
+#define _HW_VM_C_
+
+#include "device_table.h"
+#include "cpu.h"
+
+#include <signal.h>
+
+/* DEVICE
+
+   vm - virtual memory device for user simulation modes
+
+   DESCRIPTION
+
+   In user mode, mapped text, data and stack addresses are managed by
+   the core.  Unmapped addresses are passed onto this device (because
+   it establishes its self as the fallback device) for processing.
+
+   During initialization, children of this device will request the
+   mapping of the initial text and data segments.  Those requests are
+   passed onto the core device so that that may establish the initial
+   memory regions.
+
+   Once the simulation has started (as noted above) any access to an
+   unmapped address range will be passed down to this device as an IO
+   access.  This device will then either attach additional memory to
+   the core device or signal the access as being invalid.
+
+   The IOCTL function is used to notify this device of any changes to
+   the users `brk' point.
+
+   PROPERTIES
+
+   stack-base = <number>
+
+   Specifies the lower address of the stack segment in the users
+   virtual address space.  The initial stack page is defined by
+   stack-base + nr-bytes.
+
+   nr-bytes = <number>
+
+   Specifies the maximum size of the stack segment in the users
+   address space.
+
+   */
+
+typedef struct _hw_vm_device {
+  /* area of memory valid for stack addresses */
+  unsigned_word stack_base; /* min possible stack value */
+  unsigned_word stack_bound;
+  unsigned_word stack_lower_limit;
+  /* area of memory valid for heap addresses */
+  unsigned_word heap_base;
+  unsigned_word heap_bound;
+  unsigned_word heap_upper_limit;
+} hw_vm_device;
+
+
+static void
+hw_vm_init_address_callback(device *me)
+{
+  hw_vm_device *vm = (hw_vm_device*)device_data(me);
+
+  /* revert the stack/heap variables to their defaults */
+  vm->stack_base = device_find_integer_property(me, "stack-base");
+  vm->stack_bound = (vm->stack_base
+		     + device_find_integer_property(me, "nr-bytes"));
+  vm->stack_lower_limit = vm->stack_bound;
+  vm->heap_base = 0;
+  vm->heap_bound = 0;
+  vm->heap_upper_limit = 0;
+
+  /* establish this device as the default memory handler */
+  device_attach_address(device_parent(me),
+			device_name(me),
+			attach_callback + 1,
+			0 /*address space - ignore*/,
+			0 /*addr - ignore*/,
+			(((unsigned)0)-1) /*nr_bytes - ignore*/,
+			access_read_write /*access*/,
+			me);
+}
+
+
+static void
+hw_vm_attach_address(device *me,
+		  const char *name,
+		  attach_type attach,
+		  int space,
+		  unsigned_word addr,
+		  unsigned nr_bytes,
+		  access_type access,
+		  device *who) /*callback/default*/
+{
+  hw_vm_device *vm = (hw_vm_device*)device_data(me);
+  /* update end of bss if necessary */
+  if (vm->heap_base < addr + nr_bytes) {
+    vm->heap_base = addr + nr_bytes;
+    vm->heap_bound = addr + nr_bytes;
+    vm->heap_upper_limit = addr + nr_bytes;
+  }
+  device_attach_address(device_parent(me),
+			device_name(me),
+			attach_raw_memory,
+			0 /*address space*/,
+			addr,
+			nr_bytes,
+			access,
+			me);
+}
+
+
+static unsigned
+hw_vm_add_space(device *me,
+		unsigned_word addr,
+		unsigned nr_bytes,
+		cpu *processor,
+		unsigned_word cia)
+{
+  hw_vm_device *vm = (hw_vm_device*)device_data(me);
+  unsigned_word block_addr;
+  unsigned block_nr_bytes;
+
+  /* an address in the stack area, allocate just down to the addressed
+     page */
+  if (addr >= vm->stack_base && addr < vm->stack_lower_limit) {
+    block_addr = FLOOR_PAGE(addr);
+    block_nr_bytes = vm->stack_lower_limit - block_addr;
+    vm->stack_lower_limit = block_addr;
+  }
+  /* an address in the heap area, allocate all of the required heap */
+  else if (addr >= vm->heap_upper_limit && addr < vm->heap_bound) {
+    block_addr = vm->heap_upper_limit;
+    block_nr_bytes = vm->heap_bound - vm->heap_upper_limit;
+    vm->heap_upper_limit = vm->heap_bound;
+  }
+  /* oops - an invalid address - abort the cpu */
+  else if (processor != NULL) {
+    cpu_halt(processor, cia, was_signalled, SIGSEGV);
+    return 0;
+  }
+  /* 2*oops - an invalid address and no processor */
+  else {
+    return 0;
+  }
+
+  /* got the parameters, allocate the space */
+  device_attach_address(device_parent(me),
+			"vm@0x0,0", /* stop remap */
+			attach_raw_memory,
+			0 /*address space*/,
+			block_addr,
+			block_nr_bytes,
+			access_read_write,
+			me);
+  return block_nr_bytes;
+}
+
+
+static unsigned
+hw_vm_io_read_buffer_callback(device *me,
+			   void *dest,
+			   int space,
+			   unsigned_word addr,
+			   unsigned nr_bytes,
+			   cpu *processor,
+			   unsigned_word cia)
+{
+  if (hw_vm_add_space(me, addr, nr_bytes, processor, cia) >= nr_bytes) {
+    memset(dest, 0, nr_bytes); /* always initialized to zero */
+    return nr_bytes;
+  }
+  else 
+    return 0;
+}
+
+
+static unsigned
+hw_vm_io_write_buffer_callback(device *me,
+			    const void *source,
+			    int space,
+			    unsigned_word addr,
+			    unsigned nr_bytes,
+			    cpu *processor,
+			    unsigned_word cia)
+{
+  if (hw_vm_add_space(me, addr, nr_bytes, processor, cia) >= nr_bytes) {
+    return device_dma_write_buffer(device_parent(me), source,
+				   space, addr,
+				   nr_bytes,
+				   0/*violate_read_only*/);
+  }
+  else
+    return 0;
+}
+
+
+static int
+hw_vm_ioctl_callback(device *me,
+		     cpu *processor,
+		     unsigned_word cia,
+		     va_list ap)
+{
+  /* While the caller is notified that the heap has grown by the
+     requested amount, the heap is actually extended out to a page
+     boundary. */
+  hw_vm_device *vm = (hw_vm_device*)device_data(me);
+  unsigned_word requested_break = va_arg(ap, unsigned_word);
+  unsigned_word new_break = ALIGN_8(requested_break);
+  unsigned_word old_break = vm->heap_bound;
+  signed_word delta = new_break - old_break;
+  if (delta > 0)
+    vm->heap_bound = ALIGN_PAGE(new_break);
+  return 0;
+}
+
+
+static device_callbacks const hw_vm_callbacks = {
+  { hw_vm_init_address_callback, },
+  { hw_vm_attach_address,
+    passthrough_device_address_detach, },
+  { hw_vm_io_read_buffer_callback,
+    hw_vm_io_write_buffer_callback, },
+  { NULL, passthrough_device_dma_write_buffer, },
+  { NULL, }, /* interrupt */
+  { generic_device_unit_decode,
+    generic_device_unit_encode, },
+  NULL, /* instance */
+  hw_vm_ioctl_callback,
+};
+
+
+static void *
+hw_vm_create(const char *name,
+	      const device_unit *address,
+	      const char *args,
+	      device *parent)
+{
+  hw_vm_device *vm = ZALLOC(hw_vm_device);
+  return vm;
+}
+
+const device_descriptor hw_vm_device_descriptor[] = {
+  { "vm", hw_vm_create, &hw_vm_callbacks },
+  { NULL },
+};
+
+#endif _HW_VM_C_