OpenBIOS June 2019

openbios@openbios.org

2 participants
5 discussions

by berrie.schuurhuis＠gmail.com

As a newbee in this space I got qemu-system-sparc[64] running on a linux machine. Trying to find out how qemu and openbios work together I'm currently looking into building openbios-sparc64. This goes with mixed success as https://www.openfirmware.info/OpenBIOS has nice description on how to build openbios, but there's a missing link as to how to harvest the openbios-sparc64 from this. My build of openbios is done on an Ultra60(Sparc) machine that runs: Linux ultra60 4.19.0-2-sparc64 #1 Debian 4.19.16-1 (2019-01-17) sparc64 GNU/Linux with gcc --version gcc (Debian 8.3.0-2) 8.3.0 It seems like the file openbios/obj-sparc64/openbios-builtin.elf may be the candidate to become openbios-sparc64?? When giving this a try, and moving openbios-builtin.elf to my x86 qemu machine, it crashes spectacularly with: qemu: fatal: Trap 0x0064 while trap level (5) >= MAXTL (5), Error state pc: 0000000000004c80 npc: 0000000000004c84 %g0-3: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 %g4-7: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 %o0-3: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 %o4-7: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 %l0-3: 00000000fff001e0 000001ff00000000 000001fff0080000 0000000000000000 %l4-7: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 %i0-3: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 %i4-7: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 %f00: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 %f08: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 %f16: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 %f24: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 %f32: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 %f40: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 %f48: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 %f56: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 pstate: 00000414 ccr: 44 (icc: -Z-- xcc: -Z--) asi: 00 tl: 5 pil: 0 gl: 2 tbr: 0000000000000000 hpstate: 0000000000000000 htba: 0000000000000000 cansave: 6 canrestore: 0 otherwin: 0 wstate: 0 cleanwin: 6 cwp: 7 fsr: 0000000000000000 y: 0000000000000000 fprs: 0000000000000000 On x86: Booting qemu with the provided openbios-sparc64 rom works flawless. On the Ultra60: Running ./openbios-unix openbios-sparc64.dict seems to behave as expected: Output device screen not found. Input device keyboard not found. Output device screen not found. Type 'help' for detailed information [unix] Booting default not supported. Trying disk... No valid state has been set by load or init-program 0 > help To get openbios build, I had to make a small change in Makefile.target: #CFLAGS+= -Werror CFLAGS+= -Wno-error To "fix": Building OpenBIOS for sparc64 Building... /usr/bin/xsltproc error: CC target/arch/unix/unix.o CC target/arch/unix/boot.o /sources/openbios/arch/unix/boot.c:101:6: error: redundant redeclaration of 'forth_fw_cfg_read_file' [-Werror=redundant-decls] void forth_fw_cfg_read_file(void); ^~~~~~~~~~~~~~~~~~~~~~ In file included from ./target/include/asm/io.h:8, from /sources/openbios/include/kernel/kernel.h:22, from /sources/openbios/include/libopenbios/bindings.h:21, from /sources/openbios/arch/unix/boot.c:6: /sources/openbios/include/arch/common/fw_cfg.h:104:6: note: previous declaration of 'forth_fw_cfg_read_file' was here void forth_fw_cfg_read_file(void); ^~~~~~~~~~~~~~~~~~~~~~ cc1: all warnings being treated as errors Any pointers or suggestions to continue this journey are appreciated.

2 years, 1 month

Re: [OpenBIOS] Back at it again( PCI Passthrough )

by Jd Lyons

Ok, I made those changes to openbios, here is the output. > On May 8, 2018, at 6:50 AM, Joe van Tunen <joevt(a)shaw.ca> wrote: > > : (debug-feval) ( fcode# -- fcode# ) > \ Address > fcode-stream 1 - . here u. ." : " > > \ Indicate if word is compiled > state @ 0<> if > ." (compile) " > then > dup fcode>xt cell - lfa2name type > dup ." [ 0x" . ." ]" cr > ;

2 years, 6 months

[PATCH v5] arch/ppc/qemu: Add a node for the other (empty) PCI bus to the device tree

by BALATON Zoltan

QEMU mac99 emulates two of the three PCI buses found on real PowerMac3,1 but OpenBIOS only handles a single PCI bus and initialises and puts info in the device tree of the second PCI bus only which is where devices are connected and calls it bus 0. However, some clients may not know about this or have hardcoded assumptions and erroneously use the address of the first bus to access PCI config registers for devices on the second bus which silently fails as these requests will go to the other empty bus emulated and return invalid values. Devices mapped via MMIO still appear to work but they may not be correctly initialised and some cards are not detected because of this. Until support for multiple PCI buses is implemented add an empty node in the device tree for the uninitialised bus to let clients know about it. This fixes detecting PCI devices (such as USB) under MorphOS and may also fix enabling the bus master bit needed with some network cards and allow the workarund for that to be reverted. Signed-off-by: BALATON Zoltan <balaton(a)eik.bme.hu> --- arch/ppc/qemu/init.c | 50 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 50 insertions(+) diff --git a/arch/ppc/qemu/init.c b/arch/ppc/qemu/init.c index f72728c..a996404 100644 --- a/arch/ppc/qemu/init.c +++ b/arch/ppc/qemu/init.c @@ -716,6 +716,46 @@ static void kvm_of_init(void) fword("finish-device"); } +static void empty_pci_bus_init(void) +{ + if (machine_id == ARCH_MAC99) { + activate_device("/"); + fword("new-device"); + push_str("pci"); + fword("device-name"); + push_str("pci"); + fword("device-type"); + PUSH(0xf0000000); + fword("encode-int"); + PUSH(0x02000000); + fword("encode-int"); + fword("encode+"); + push_str("reg"); + fword("property"); + PUSH(3); + fword("encode-int"); + push_str("#address-cells"); + fword("property"); + PUSH(2); + fword("encode-int"); + push_str("#size-cells"); + fword("property"); + PUSH(1); + fword("encode-int"); + push_str("#interrupt-cells"); + fword("property"); + PUSH(0); + fword("encode-int"); + PUSH(0); + fword("encode-int"); + fword("encode+"); + push_str("bus-range"); + fword("property"); + fword("finish-device"); + device_end(); + } +} + /* * filll ( addr bytes quad -- ) */ @@ -859,7 +899,17 @@ arch_of_init(void) feval("['] ppc-dma-sync to (dma-sync)"); #ifdef CONFIG_DRIVER_PCI + /* Add empty node for first pci bus on MAC99 */ + /* Remove this when pci driver is fixed to handle multiple buses */ + empty_pci_bus_init(); ob_pci_init(); + if (machine_id == ARCH_MAC99) { + phandle_t dev = find_dev("/pci@f2000000"); + if (dev) { + u32 props[2] = {0, 1}; + set_property(dev, "bus-range", (char *)props, 2 * sizeof(props[0])); + } + } #endif printk("\n"); -- 2.13.7

2 years, 6 months

[PATCH 0/2] SPARC32: fix crash when starting qemu-system-sparc with no framebuffer

by Mark Cave-Ayland

A recent patch to QEMU that allows sun4m machines to be launched with -vga none revealed a crash on startup due to the missing framebuffer. Signed-off-by: Mark Cave-Ayland <mark.cave-ayland(a)ilande.co.uk> Mark Cave-Ayland (2): sbus: don't use internal fallback TCX driver with QEMU SPARC32: use serial console when QEMU is launched with -vga none arch/sparc32/init.fs | 7 +++++-- arch/sparc32/openbios.c | 8 ++++++++ drivers/sbus.c | 11 +++++++++++ 3 files changed, 24 insertions(+), 2 deletions(-) -- 2.11.0

2 years, 6 months

[PATCH] SPARC64: use serial console when QEMU is launched with -vga none

by Mark Cave-Ayland

If no display device has been installed in the DT e.g. passing -vga none into the QEMU command line then fall back to using the serial console as already occurs when launching QEMU in -nographic mode. Signed-off-by: Mark Cave-Ayland <mark.cave-ayland(a)ilande.co.uk> --- arch/sparc64/openbios.c | 13 +++++++++++-- 1 file changed, 11 insertions(+), 2 deletions(-) diff --git a/arch/sparc64/openbios.c b/arch/sparc64/openbios.c index a783c1f..e2f7e59 100644 --- a/arch/sparc64/openbios.c +++ b/arch/sparc64/openbios.c @@ -537,10 +537,11 @@ void arch_nvram_get(char *data) uint32_t temp; uint64_t ram_size; uint32_t clock_frequency; - uint16_t machine_id; + uint16_t machine_id, nographic; const char *stdin_path, *stdout_path; char *bootorder_file, *boot_path; uint32_t bootorder_sz, sz; + phandle_t display_ph; fw_cfg_init(); @@ -701,7 +702,15 @@ void arch_nvram_get(char *data) push_str("/chosen"); fword("find-device"); - if (fw_cfg_read_i16(FW_CFG_NOGRAPHIC)) { + nographic = fw_cfg_read_i16(FW_CFG_NOGRAPHIC); + + /* Check to see if any framebuffer present */ + display_ph = dt_iterate_type(0, "display"); + if (display_ph == 0) { + nographic = 1; + } + + if (nographic) { stdin_path = stdout_path = "ttya"; } else { stdin_path = "keyboard"; -- 2.11.0

2 years, 6 months