OpenBIOS August 2019

openbios@openbios.org

6 participants
8 discussions

[PATCH] admin/devices.fs: Format assigned-addresses property

by BALATON Zoltan

To help reading property listing also format assigned-addresses property the same way as reg was already formatted. Signed-off-by: BALATON Zoltan <balaton(a)eik.bme.hu> --- Actually wanted to improve printing of ranges but I could not do that this one is simpler though. forth/admin/devices.fs | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/forth/admin/devices.fs b/forth/admin/devices.fs index 6f9e8ef..38f6ad6 100644 --- a/forth/admin/devices.fs +++ b/forth/admin/devices.fs @@ -417,7 +417,7 @@ \ This function hardwires data formats to particular node properties : (.property-by-name) ( name-str name-len data len -- ) - 2over " reg" strcmp 0= if + 2over 2dup " reg" strcmp 0= -rot " assigned-addresses" strcmp 0= or if my-#acells my-#scells 2swap .p-reg 2drop exit then -- 2.13.7

6 days, 8 hours

Experiments with OpenFirmware

by BALATON Zoltan

Hello, On Tue, 30 Jul 2019, BALATON Zoltan wrote: > 3. Try to get some other OF implementation working like OpenFirmware. Based > on previous work by Atar for the 40p this is possible although to do it > cleanly may be more work and hindered by the need to do it in Forth > completely. But Forth is needed to hack on OpenBIOS as well so once someone > gets over that hurdle it does not matter. I've started looking at this > posibility to find out how much work would this be that's why I was asking > the question. I've compiled Atar's work which is now upstram in Mitch > Bradley's tree and it worked well with 40p and even started with pegasos2 but > of course it did not init the hardware correctly expecting to run on 40p > (haven't tried with mac99 but I expect the same result). So OpenFirmware > already works on PPC and has some QEMU specific drivers what we may need is > porting drivers for mac specific and pegasos2 devices from OpenBIOS from C to > Forth (or get equivalents from somewhere else) and think about how to pass > the initial device tree similar to SLOF to avoid having to implement each > board in OpenFirmware separately (although doing hardcoded board > implementation like Atar's 40p might be a quick and dirty way to get it > working with much less work). I gave it a try playing with it for a few hours (without really knowing what am I doing) just to get to know it better and see what's needed. So I started by stripping down Atar's QEMU PReP port removing PReP specific parts and just leaving a bare minimum to work on PowerPC and I actually managed to build a ROM image that works with my pegasos2 emulation and gets me an OF environment over diag serial port now: $ qemu-system-ppc -M pegasos2 -bios ofw.rom -serial stdio setup_mem_windows: Should enable region 14 Mapping pci1-io-win 0x0+0x2000000 @ 0xfe000000 setup_mem_windows: Should enable region 20 Type 'i' to interrupt stand-init sequence First stand-init: Calibrate CIF buffers DHCP init memory node Instruction cache on Decrementer Enable machine check exceptions Set Memory Map MMU Root node Data cache on Fast CPU mode PCI host bridge CPU nodes Keyboard overrides Memory node not found. not found. /pci/isa/serial@i2f8 not found. /pci/isa/serial@i2f8 not found. not found. not found. , Serial #0, 128 MiB memory installed Open Firmware Copyright (c) 1995-2000, FirmWorks. Copyright (c) 2014,2017,2019 Artyom Tarasenko. Type any key to interrupt automatic startup 6 5 4 3 2 1 Boot device: net Arguments: Can't open boot device ok show-devs /dropin-fs /null-nvram /cpus /<Unnamed> /mmu /memory@0 /aliases /options /openprom /chosen /packages /cpus/PowerPC,603evARTHUR@0 /packages/ext2-file-system /packages/disk-label /packages/iso9660-file-system /packages/fat-file-system /packages/obp-tftp /packages/deblocker /packages/stringio /packages/terminal-emulator /packages/client-services ok printenv Variable Name Value Default Value hrp-memmap? false false virt-size 0x0 0xffffffff virt-base 0x0 0xffffffff real-size 0x0 0xffffffff real-base 0x0 0xffffffff real-mode? false false diag-switch? false false fcode-debug? false false ip-address 255.255.255.255 255.255.255.255 ip-router ip-domain ip-netmask 255.255.255.0 255.255.255.0 ip-dns-server local-mac-address? false false oem-logo oem-logo? false false oem-banner oem-banner? false false output-device /pci/isa/serial@i2f8 /pci/isa/serial@i2f8 input-device /pci/isa/serial@i2f8 /pci/isa/serial@i2f8 load-base 4194304 4194304 boot-command boot boot auto-boot? true true watchdog-reboot? false false diag-file diag-device net net boot-file boot-device disk net disk net ansi-terminal? true true screen-#columns 80 80 screen-#rows 34 34 silent-mode? false false use-nvramrc? false false nvramrc security-password security-#badlogins 0 security-mode none diag-switch? false false ok dev / ok .properties #address-cells 00000001 ok dev openprom ok .properties model FirmWorks,3.0 aligned-allocator relative-addressing name openprom ok dev /cpus/PowerPC,603evARTHUR ok .properties clock-frequency 05f5e100 reg 00000000 timebase-frequency 007de290 tlb-sets 00000080 tlb-size 00000100 d-cache-sets 00000080 d-cache-block-size 00000020 d-cache-size 00008000 i-cache-sets 00000080 i-cache-block-size 00000020 i-cache-size 00008000 device_type cpu name PowerPC,603evARTHUR ok Of course it's only the start and has a lot of missing parts yet: does not detect PCI bus and devices (I need to write a driver for the PCI host similar to what Atar did for 40p), it misdetects the CPU (or it may be hard coded somewhere), does not detect memory size (this is mentioned on Atar's blog) and may have other defficiencies. But for a start it works quite well and it was surprisingly easy to get it up thanks to previous work. Given that the Pegasos2 is quite close to PReP and PC hardware most of the drivers for PC like hardware are already there in OF, so maybe if I can make a working driver for the system controller chip the rest would just work or should be relatively easy to fix. So for the pegasos2 this seems to be a viable alternative that may not be too hard to get working if I limit the scope to just the pegasos2. For Mac machines more drivers would need to be written as these are not included in the open source OF version that was released for OLPC so only those drivers are included which were needed for that. Therefore it would be more work to write those missing drivers. We have USB driver (I've once tried porting that to OpenBIOS[1]) so keyboard and mouse might work where we have USB but we would still need drivers for uninorth and mac-io at least to get something working but maybe others as well, I'm not sure. For Sparc machines even CPU support is missing so it may be more difficult to get that working. Or maybe not as this could be added based on some other similar architecture: arm, mips and ppc are already there but these do have a lot of Forth files so it may take a while to understand those. I don't know Sparc hardware to tell what drivers may be needed. But from Atar's blog on getting OF working for QEMU PReP/40p I got the impression that Mitch Bradley (inventor of OpenFirmware and founder of FirmWorks) did help him by releasing some additional drivers or sources that he needed so maybe asking politely would not hurt and it may get easier, unless there are legal hurdles in releasing additional sources. Otherwise those need to be recreated but that may still be doable if someone does not mind learning enough Forth to do it. I'm not sure which is more work, getting OpenBIOS to the same level or writing drivers for OpenFirmware but maybe for PPC machines it's not much harder to rewrite the missing drivers. For Sparc I'm not sure, PPC support was already there so I don't know what it takes to add a new cpu support. Regards, BALATON Zoltan [1] One can follow the thread starting here: https://mail.coreboot.org/pipermail/openbios/2014-May/008244.html but basically the attempt to port OF driver to OpenBIOS ended with: https://mail.coreboot.org/pipermail/openbios/2014-May/008281.html some of those words are already there now but some are still missing. I've ended up finishing the C driver which was finally added, even though I only wanted to try qemu-system-ppc64 originally and did not plan to port a USB driver. That's what I meant saying I end up having to do fixes whenever I try something in OpenBIOS: like trying an FCode ROM the last time. At least OpenFirmware implements the standard already perfectly so we would only need to care about getting it to work with the machine and not if it has everythung that might be needed by stuff using it (or at least much less so than starting from scratch).

1 month

[PATCH v3 00/30] pci: build device tree from root

by Mark Cave-Ayland

This patchset started off with the aim of building the PCI-based machine device trees downwards from the root node to avoid switching either the active package and/or current instance at various points during the tree construction. The basis for this was to try and remove all named nodes (those which are placed at a given path) and instead build the hierarchy in order by using new-device and finish-device as per the IEEE-1275 specification. This was realised by creating a new BIND_NODE_METHODS() macro which is similar to REGISTER_NAMED_NODE() except that it doesn't alter either the active package or the current instance, and then working through the device tree from the root converting all the devices for the PCI-based machines to use it. Once this conversion has been completed for all devices beneath the PCI node, it becomes possible to remove both the REGISTER_NAMED_NODE() and REGISTER_NAMED_NODE_PHANDLE() macros to prevent future patches from accidentally changing the tree construction order. Next the x86, PPC and SPARC64 device tree roots were altered to set the active package and current instance, allowing the remaining places where the PCI code alters either of them to be removed. At this point instance variables were working correctly, and I noticed that there were several PCI devices which made use of C initialisation functions and/or properties for initial configuration. These can now be replaced with instance variables to keep everything simple and consistent. Signed-off-by: Mark Cave-Ayland <mark.cave-ayland(a)ilande.co.uk> v3: - Rebase onto master - Fix up USB debug string for keyboard reported by Zoltan - Fix for creating devices that don't have an entry in the PCI database - Fix for MacOS 9 not initialising network reported by Howard v2: - Fix up NVRAM initialisation so that -prom-env 'vga-ndrv?=false' works again Mark Cave-Ayland (30): libopenbios: introduce BIND_NODE_METHODS() macro pc_kbd: convert to use BIND_NODE_METHODS() macro pc_serial: convert to use BIND_NODE_METHODS() macro floppy: convert to use BIND_NODE_METHODS() macro ide: convert to use BIND_NODE_METHODS() macro adb: convert to use BIND_NODE_METHODS() macro escc: convert to use BIND_NODE_METHODS() macro cuda: convert to use BIND_NODE_METHODS() macro macio: convert to use BIND_NODE_METHODS() macro pmu: convert to use BIND_NODE_METHODS() macro usbhid: convert to use BIND_NODE_METHODS() macro nvram: convert to use BIND_NODE_METHODS() macro lsi: don't change active package when setting device alias lsi: convert to use BIND_NODE_METHODS() macro virtio: convert to use BIND_NODE_METHODS() macro pci: convert to use BIND_NODE_METHODS() macro pci: remove ob_pci_initialize() and ob_pci_empty_node libopenbios: remove REGISTER_NAMED_NODE and REGISTER_NAMED_NODE_PHANDLE macros nvram: ensure that NVRAM configuration is separate from NVRAM node creation ppc: move New World uninorth and nvram device node creation to the root device ppc: set active package and current instance to root device node before probe SPARC64: set active package and current instance to root device node before probe x86: set active package and current instance to root device node before probe pci: remove explicit find-device from PCI devices pci: remove explicit setting of my-self from PCI devices pci: call set-args before configuring PCI device nodes pc_serial: remove separate init word pc_kbd: use instance value to initialise C instance parameter lsi: use instance value to hold sd_private_t pointer virtio: use instance value to initialise C instance parameter arch/ppc/qemu/init.c | 18 +++- arch/sparc64/openbios.c | 6 ++ arch/x86/openbios.c | 9 +- drivers/adb_bus.c | 57 +++++++----- drivers/adb_kbd.c | 25 ++++-- drivers/adb_mouse.c | 31 ++++--- drivers/cuda.c | 158 ++++++++++++++++++++------------- drivers/escc.c | 113 ++++++++++++++--------- drivers/floppy.c | 68 +++++++------- drivers/ide.c | 123 +++++++++++++++---------- drivers/lsi.c | 65 +++++++------- drivers/macio.c | 118 ++++++++++++------------ drivers/macio.h | 1 - drivers/pc_kbd.c | 48 +++++----- drivers/pc_serial.c | 32 +++---- drivers/pci.c | 132 +++++++++++++-------------- drivers/pmu.c | 152 +++++++++++++++++++++---------- drivers/usbhid.c | 17 ++-- drivers/virtio.c | 56 +++--------- include/drivers/drivers.h | 2 + include/libopenbios/bindings.h | 19 ++-- include/packages/nvram.h | 4 +- libopenbios/bindings.c | 10 +++ packages/nvram.c | 35 ++++++-- 24 files changed, 755 insertions(+), 544 deletions(-) -- 2.20.1

1 month, 3 weeks

[PATCH 0/2] gcc 9 build fixes

by Mark Cave-Ayland

During the past couple of weeks I've updated my build chain to use gcc 9.1 which generates some additional warnings that cause the build to fail when building with -Werror. Signed-off-by: Mark Cave-Ayland <mark.cave-ayland(a)ilande.co.uk> Mark Cave-Ayland (2): all: gcc 9 build fixes ppc: reduce size of Forth dictionary to 384K arch/ppc/qemu/kernel.c | 4 ++-- arch/sparc32/context.c | 2 +- drivers/cuda.c | 4 ++-- drivers/ide.c | 2 +- drivers/pmu.c | 4 ++-- fs/hfs/hfs_fs.c | 2 +- packages/nvram.c | 2 +- 7 files changed, 10 insertions(+), 10 deletions(-) -- 2.20.1

2 months

Muti CPU Support

by Jd Lyons

I’ve been working a little to see if I can get multi-threaded TGC to work for the Mac OS/X in qemu, but Openbios doesn’t seem to support more than one CPU and doesn’t build any device for a second CPU. I’ve looked at the openbios/arch/ppc/qemu/init.c, and that seems to be the place to apply a patch for multi cpu support, but I don’t really seem any graceful way of doing it. Can anyone offer any help? TGC-Work/bin/qemu-system-ppc -M mac99,via=pmu -serial stdio -smp 2,cores=2,threads=1 -accel tcg,thread=multi -cpu g4 -boot c -prom-env auto-boot?=true -prom-env boot-args=-v -hda /Users/jam/os9.2.1.img -m 256 -bios /Users/jam/aty7/openbios/obj-ppc/openbios-qemu.elf heathrow_class_init: init 2 core99_machine_class_init: init 2 qemu-system-ppc: warning: Guest not yet converted to MTTCG - you may get unexpected results s>> et_property: NULL phandle >> ============================================================= >> OpenBIOS 1.1 [Aug 6 2019 02:05] >> Configuration device id QEMU version 1 machine id 1 >> CPUs: 2 >> Memory: 256M >> UUID: 00000000-0000-0000-0000-000000000000 >> CPU type PowerPC,G4 milliseconds isn't unique. >> switching to new context: >> call-method slw_update_keymap failed with error ffffffdf >> call-method slw_update_keymap failed with error ffffffdf

2 months

Re: R128 interrupts

by Jd Lyons

I’m 99% sure this is the trouble, I don’’t really understand IRQ’s and interrupts, there is some info in the Rage_128_register_referance_guide. I tested my theory via OS X 10.4.11and it mapped the VRAM rather than giving me the ATY:Not Usable, it also changed the screen resolution twice, once to 640x480 then to 1280x960. dev /pci/@f “ /pci/@f” select-dev “ ATY,Rage128Pd” encode-string “ name” property 1 encode-int “ interrupts” property boot OS X would not be able to change the screen resolution if the ‘NDRV’ didn’t load!!! So I’m 99% sure this is the trouble and we need to figure out how to create a mapped interrupt for the card, rather than this dummy Interrupt I create because I’m a dummy;-) > On Aug 8, 2019, at 12:41 AM, Jd Lyons <lyons_dj(a)yahoo.com> wrote: > > > Could be the Rage128 ‘NDRV’ is aborting do to the lack of an interrupt……….

2 months, 1 week

[PATCH] Implement missing words for the ATI FCode ROM to test ati-vga emulation

by BALATON Zoltan

Signed-off-by: BALATON Zoltan <balaton(a)eik.bme.hu> --- drivers/pci.c | 51 +++++++++++++++++++++++++++++++++++++-------------- drivers/pci.fs | 41 +++++++++++++++++++++++++++++++++++++++++ drivers/vga.fs | 4 ++-- forth/device/other.fs | 6 ++++++ 4 files changed, 86 insertions(+), 16 deletions(-) This is on top of Mark's previous patches from the openbios mailing list applied to openbios master: 9a32ed9 Implement missing words for the ATI FCode ROM to test ati-vga emulation b90ac41 virtio: use instance value to initialise C instance parameter ac467a3 lsi: use instance value to hold sd_private_t pointer 177684a pc_kbd: use instance value to initialise C instance parameter d5fdb98 pc_serial: remove separate init word 7c20840 pci: call set-args before configuring PCI device nodes f37460e pci: remove explicit setting of my-self from PCI devices b548924 pci: remove explicit find-device from PCI devices b1ca78f x86: set active package and current instance to root device node before probe 6222a47 SPARC64: set active package and current instance to root device node before probe 5cd41e5 ppc: set active package and current instance to root device node before probe e68504f ppc: move New World uninorth and nvram device node creation to the root device 86aa740 nvram: ensure that NVRAM configuration is separate from NVRAM node creation e959bfd libopenbios: remove REGISTER_NAMED_NODE and REGISTER_NAMED_NODE_PHANDLE macros abc4553 pci: remove ob_pci_initialize() and ob_pci_empty_node 0a63c74 pci: convert to use BIND_NODE_METHODS() macro 57ff6ea virtio: convert to use BIND_NODE_METHODS() macro ea3a8eb lsi: convert to use BIND_NODE_METHODS() macro 32ff529 lsi: don't change active package when setting device alias f63f5ee nvram: convert to use BIND_NODE_METHODS() macro 03c53be usbhid: convert to use BIND_NODE_METHODS() macro 365b2c1 pmu: convert to use BIND_NODE_METHODS() macro 60125f5 macio: convert to use BIND_NODE_METHODS() macro 7d23b31 cuda: convert to use BIND_NODE_METHODS() macro 305d629 escc: convert to use BIND_NODE_METHODS() macro 4a0aea1 adb: convert to use BIND_NODE_METHODS() macro 0081f71 ide: convert to use BIND_NODE_METHODS() macro 79a241c floppy: convert to use BIND_NODE_METHODS() macro 01ea2e4 pc_serial: convert to use BIND_NODE_METHODS() macro 9eb09a9 pc_kbd: convert to use BIND_NODE_METHODS() macro 8945ab4 libopenbios: introduce BIND_NODE_METHODS() macro e9491ea admin/devices.fs: Format assigned-addresses propertyadmin/devices.fs: Format assigned-addresses propertyadmin/devices.fs: Format assigned-addresses propertyadmin/devices.fs: Format assigned-addresses propertyadmin/devices.fs: Format assigned-addresses propertyadmin/devices.fs: Format assigned-addresses propertyadmin/devices.fs: Format assigned-addresses propertyadmin/devices.fs: Format assigned-addresses propertyadmin/devices.fs: Format assigned-addresses propertyadmin/devices.fs: Format assigned-addresses propertyadmin/devices.fs: Format assigned-addresses propertyadmin/devices.fs: Format assigned-addresses propertyadmin/devices.fs: Format assigned-addresses propertyadmin/devices.fs: Format assigned-addresses propertyadmin/devices.fs: Format assigned-addresses propertyadmin/devices.fs: Format assigned-addresses property c79e0ec (origin/master, origin/HEAD) SPARC64: use serial console when QEMU is launched with -vga none admin/devices.fs: Format assigned-addresses property is https://mail.coreboot.org/hyperkitty/list/openbios@openbios.org/thread/WH... and additionally to the above I also have another patch from Mark that I can't find now in the list archives even though I remember I've replyed to it and had a discussion about having 3 or 2 cases if-else statement. diff --git a/drivers/pci.c b/drivers/pci.c index 4bc02c9..eb5f7d3 100644 --- a/drivers/pci.c +++ b/drivers/pci.c @@ -408,20 +408,32 @@ static void ob_pci_unmap(ucell virt, ucell size) { static void ob_pci_bus_map_in(int *idx) { - uint32_t ba; - ucell size; - ucell virt; - - PCI_DPRINTF("ob_pci_bar_map_in idx=%p\n", idx); + fword("pci-map-in"); +} - size = POP(); - POP(); - POP(); - ba = POP(); +static void +ob_pci_bus_map_out(int *idx) +{ + /* Should call pci-map-out but nothing to do in it yet */ + fword("2drop"); +} - virt = ob_pci_map(ba, size); +static void +ob_pci_config_read8(int *idx) +{ + cell hi = POP(); + pci_addr addr = PCI_ADDR(PCI_BUS(hi), PCI_DEV(hi), PCI_FN(hi)); + uint8_t val = pci_config_read8(addr, hi & 0xff); + PUSH(val); +} - PUSH(virt); +static void +ob_pci_config_write8(int *idx) +{ + cell hi = POP(); + pci_addr addr = PCI_ADDR(PCI_BUS(hi), PCI_DEV(hi), PCI_FN(hi)); + cell val = POP(); + pci_config_write8(addr, hi & 0xff, val & 0xff); } static void @@ -459,7 +471,10 @@ NODE_METHODS(ob_pci_bus_node) = { { "close", ob_pci_close }, { "decode-unit", ob_pci_decode_unit }, { "encode-unit", ob_pci_encode_unit }, - { "pci-map-in", ob_pci_bus_map_in }, + { "map-in", ob_pci_bus_map_in }, + { "map-out", ob_pci_bus_map_out }, + { "config-b@", ob_pci_config_read8 }, + { "config-b!", ob_pci_config_write8 }, { "dma-alloc", ob_pci_dma_alloc }, { "dma-free", ob_pci_dma_free }, { "dma-map-in", ob_pci_dma_map_in }, @@ -473,7 +488,14 @@ static void ob_pci_bridge_map_in(int *idx) { /* As per the IEEE-1275 PCI specification, chain up to the parent */ - call_parent_method("pci-map-in"); + call_parent_method("map-in"); +} + +static void +ob_pci_bridge_map_out(int *idx) +{ + /* As per the IEEE-1275 PCI specification, chain up to the parent */ + call_parent_method("map-out"); } NODE_METHODS(ob_pci_bridge_node) = { @@ -481,7 +503,8 @@ NODE_METHODS(ob_pci_bridge_node) = { { "close", ob_pci_close }, { "decode-unit", ob_pci_decode_unit }, { "encode-unit", ob_pci_encode_unit }, - { "pci-map-in", ob_pci_bridge_map_in }, + { "map-in", ob_pci_bridge_map_in }, + { "map-out", ob_pci_bridge_map_out }, { "dma-alloc", ob_pci_dma_alloc }, { "dma-free", ob_pci_dma_free }, { "dma-map-in", ob_pci_dma_map_in }, diff --git a/drivers/pci.fs b/drivers/pci.fs index a7b56e1..327c9c9 100644 --- a/drivers/pci.fs +++ b/drivers/pci.fs @@ -37,4 +37,45 @@ then ; +: pci-map-in ( addr.lo addr.mid addr.hi size -- virt ) + \ Ignore everything but addr.hi and find assigned addr for BAR + drop nip nip + \ Save my-self and set it to same as active package because otherwise + \ decode-phys below seems to be confused. Maybe this should not be needed + my-self swap active-package ihandle>phandle to my-self + " assigned-addresses" active-package get-package-property 0= if + begin + decode-phys ( bar prop prop-len phys.lo phys.mid phys.hi ) + dup 0fffffff and 6 pick 0fffffff and = if + 2drop -rot + decode-int drop decode-int drop 2drop + ( bar addr.lo ) + \ Now translate addr.lo, This may be wrong + \ maybe we should look at parent's ranges instead? + over 18 rshift 3 and 1 = if + " reg" active-package parent get-package-property 0= if + ( bar addr.lo prop prop-len reg.addr reg.size ) + decode-int -rot decode-int 3drop + + + then + then + nip swap to my-self + exit + else + 3drop \ no match, try next + then + \ Drop the size as we don't need it + decode-int drop decode-int drop + dup 0= + until + 3drop + to my-self + -1 \ not found + else + drop + to my-self + -1 \ could not find assigned-addresses + then + ; + [THEN] diff --git a/drivers/vga.fs b/drivers/vga.fs index 53dcff0..f3ffda7 100644 --- a/drivers/vga.fs +++ b/drivers/vga.fs @@ -146,14 +146,14 @@ defer vbe-iow! : map-fb ( -- ) cfg-bar0 pci-bar>pci-addr if \ ( pci-addr.lo pci-addr.mid pci-addr.hi size ) - " pci-map-in" $call-parent + " map-in" $call-parent to fb-addr then ; : map-mmio ( -- ) cfg-bar2 pci-bar>pci-addr if \ ( pci-addr.lo pci-addr.mid pci-addr.hi size ) - " pci-map-in" $call-parent + " map-in" $call-parent to mmio-addr then ; diff --git a/forth/device/other.fs b/forth/device/other.fs index 1bed9b8..0ff34b6 100644 --- a/forth/device/other.fs +++ b/forth/device/other.fs @@ -58,21 +58,27 @@ defer (poke) \ 5.3.7.2 Device-register access : rb@ ( addr -- byte ) + ioc@ ; : rw@ ( waddr -- w ) + iow@ ; : rl@ ( qaddr -- quad ) + iol@ ; : rb! ( byte addr -- ) + ioc! ; : rw! ( w waddr -- ) + iow! ; : rl! ( quad qaddr -- ) + iol! ; : rx@ ( oaddr - o ) -- 2.13.7

2 months, 2 weeks

Debugging FCode ROM

by BALATON Zoltan

Hello, I'm trying to find out what's missing to use an FCode ROM for the ati-vga device to see how it would set up the card for MacOS. This has been done before for other FCode ROMs e.g. here: https://mail.coreboot.org/hyperkitty/list/openbios@openbios.org/thread/E7... I can get some print out of compiling and defining new words by setting fcode-debug? and ?fcode-verbose to true as above but this only gives me what I can also get from detok but does not tell me where exactly it fails during executing these words afterwards. What I get is that after a lot of (compile), new-token and fcode# lines that define a lot of words it just ends in one of these (the second?) when executed: 400514a : [ 0x8bc ] 400514c : [ 0x926 ] byte-load: exception caught! But how can I see what's inside this word that caused the exception? There's the forth debugger I think to see or step through execution of words but how can I add an undefined/unnamed word to the debug before the the FCode runs? Looking at the definition of this word in the detok output does not get me further as it just calls more of these words defined in the FCode: 8512: b(:) 8513: (unnamed-fcode) [0x86a] 8515: (unnamed-fcode) [0x864] 8517: b(") ( len=7 ) " map-out" 8526: (unnamed-fcode) [0x91f] 8528: (unnamed-fcode) [0x86c] 8530: (unnamed-fcode) [0x866] 8532: b(") ( len=7 ) " map-out" 8541: (unnamed-fcode) [0x91f] 8543: 0 8544: b(to) (unnamed-fcode) [0x86c] 8547: 0 8548: b(to) (unnamed-fcode) [0x86a] 8551: b(;) 8552: new-token 0x926 so where can I get more details on execution of these words and the more precise location of the exception? Regards, BALATON Zoltan

2 months, 2 weeks