SeaBIOS

seabios@seabios.org

8 participants
3774 discussions

CDROM/DVD timeouts on real hardware
by Petr Cvek 21 Apr '22

21 Apr '22

Hi, Has anybody tried to boot from CDROM/DVD non-QEMU seabios lately? I've tried to boot a few CDs/DVDs on AHCI and IDE drives and although the drive is detected, it will fail to boot. There is a timeout after which the next drive will boot. It seems the timeout is located somewhere in payloads/external/SeaBIOS/seabios/src/cdrom.c in function cdrom_boot(). When I tried to comment out this test: int ret = scsi_is_ready(&dop); if (ret) dprintf(5, "scsi_is_ready returned %d\n", ret); I was able to boot windows 98SE installation CD, but it failed after a few sectors (probably when the readiness was needed to be tested :D). If somebody can confirm it is not just my board setup (kontron 986lcd-m with the current coreboot branch) I would be grateful. regards, Petr

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Floppy setup
by Petr Cvek 21 Apr '22

21 Apr '22

Hello, I was playing with coreboot + floppy and it seems the drive type can be read from CMOS only if the machine is QEMU. payloads/external/SeaBIOS/seabios/src/hw/floppy.c floppy_setup(void) { ... if (CONFIG_QEMU) { u8 type = rtc_read(CMOS_FLOPPY_DRIVE_TYPE); if (type & 0xf0) addFloppy(0, type >> 4); ... } else { u8 type = romfile_loadint("etc/floppy0", 0); ... Is it possible enable this function for a real coreboot target? What way is the most acceptable way to do it (something like || CONFIG_USE_CMOS)? I've forced it with "always true" condition and after adding configurations to cmos table and superio in coreboot, I was able to boot msdos on kontron 986lcd-m board. Regards, Petr

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[PATCH v3 0/2] Fix reset issue with QEMU -machine q35
by Volker Rümelin 04 Apr '22

04 Apr '22

This reset issue was reported on the QEMU issue tracker at https://gitlab.com/qemu-project/qemu/-/issues/766 A reset with QEMU -machine q35 -accel tcg leads to a reset loop and with -machine q35 -accel kvm the reset only works because KVM ignores the read-only semantics of the C-F segments. Details about the issue are in "reset: force standard PCI configuration access". v2: The commit message of patch "reset: force standard PCI config- uration access" now uses the correct PCI configuration register name PCIEXBAR. v3: Removes the unnecessary pci_disable_mmconfig() function calls and the function itself. [Kevin] Volker Rümelin (2): pci: refactor the pci_config_*() functions reset: force standard PCI configuration access src/fw/shadow.c | 14 ++++----- src/hw/pci.c | 81 +++++++++++++++++++++++++++++++++++++++++-------- src/hw/pci.h | 18 ++++++++++- 3 files changed, 93 insertions(+), 20 deletions(-) -- 2.34.1

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Bootsplash.jpg encoding question.
by AreYouLoco? 31 Mar '22

31 Mar '22

Hi, I am trying to make SeaBIOS on Thinkpad T420 running coreboot display bootsplash but I am failing to prepare the file. I tried to export file using GIMP and this info: https://puri.sm/wp-content/uploads/2017/02/coreboot-splash-gimp-export-opti… Relevant part of the coreboot log is: 1508[INFO ] Setting up bootsplash in 1366x768@32 1509[INFO ] CBFS: Found 'bootsplash.jpg' @0x46480 size 0x48e5 in mcache @0x7ffdd1c8 1510[DEBUG] Bootsplash image resolution: 1366x768 1511[ERROR] Bootsplash could not be decoded. jpeg_decode returned 4. I also tried to add bootsplash.bmp but then it says it didnt found bootsplash.jpg. Any hints? AreYouLoco?

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[PATCH v2 0/2] Fix reset issue with QEMU -machine q35
by Volker Rümelin 31 Mar '22

31 Mar '22

This reset issue was reported on the QEMU issue tracker at https://gitlab.com/qemu-project/qemu/-/issues/766 A reset with QEMU -machine q35 -accel tcg leads to a reset loop and with -machine q35 -accel kvm the reset only works because KVM ignores the read-only semantics of the C-F segments. Details about the issue are in "reset: force standard PCI configuration access". v2: The commit message of patch "reset: force standard PCI config- uration access" now uses the correct PCI configuration register name PCIEXBAR. Volker Rümelin (2): pci: refactor the pci_config_*() functions reset: force standard PCI configuration access src/fw/shadow.c | 16 +++++---- src/hw/pci.c | 86 ++++++++++++++++++++++++++++++++++++++++++------- src/hw/pci.h | 19 ++++++++++- 3 files changed, 101 insertions(+), 20 deletions(-) -- 2.34.1

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[PATCH 0/2] Fix reset issue with QEMU -machine q35
by Volker Rümelin 25 Mar '22

25 Mar '22

This reset issue was reported on the QEMU issue tracker at https://gitlab.com/qemu-project/qemu/-/issues/766 A reset with QEMU -machine q35 -accel tcg leads to a reset loop and with -machine q35 -accel kvm the reset only works because KVM ignores the read-only semantics of the C-F segments. Details about the issue are in "reset: force standard PCI configuration access". Volker Rümelin (2): pci: refactor the pci_config_*() functions reset: force standard PCI configuration access src/fw/shadow.c | 16 +++++---- src/hw/pci.c | 86 ++++++++++++++++++++++++++++++++++++++++++------- src/hw/pci.h | 19 ++++++++++- 3 files changed, 101 insertions(+), 20 deletions(-) -- 2.34.1

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[PATCH 1/1] sercon: do not screwup the xterm on the serial console
by Daniel Maslowski 25 Mar '22

25 Mar '22

From: Trammell Hudson <hudson(a)trmm.net> --- src/sercon.c | 21 --------------------- 1 file changed, 21 deletions(-) diff --git a/src/sercon.c b/src/sercon.c index 3019d9b4..a65c51e1 100644 --- a/src/sercon.c +++ b/src/sercon.c @@ -99,12 +99,6 @@ static void sercon_putchar(u8 chr) } } -static void sercon_term_reset(void) -{ - sercon_putchar('\x1b'); - sercon_putchar('c'); -} - static void sercon_term_clear_screen(void) { sercon_putchar('\x1b'); @@ -113,15 +107,6 @@ static void sercon_term_clear_screen(void) sercon_putchar('J'); } -static void sercon_term_no_linewrap(void) -{ - sercon_putchar('\x1b'); - sercon_putchar('['); - sercon_putchar('?'); - sercon_putchar('7'); - sercon_putchar('l'); -} - static void sercon_term_cursor_goto(u8 row, u8 col) { row++; col++; @@ -308,7 +293,6 @@ static void sercon_lazy_putchar(u8 chr, u8 attr, u8 teletype) /* Set video mode */ static void sercon_1000(struct bregs *regs) { - u8 clearscreen = !(regs->al & 0x80); u8 mode = regs->al & 0x7f; u8 rows, cols; @@ -345,11 +329,6 @@ static void sercon_1000(struct bregs *regs) SET_LOW(sercon_col_last, 0); SET_LOW(sercon_row_last, 0); SET_LOW(sercon_attr_last, 0); - - sercon_term_reset(); - sercon_term_no_linewrap(); - if (clearscreen) - sercon_term_clear_screen(); } /* Set text-mode cursor shape */ -- 2.32.0

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[ANNOUNCE] SeaBIOS 1.16.0
by Kevin O'Connor 15 Mar '22

15 Mar '22

The 1.16.0 version of SeaBIOS has now been released. For more information on the release, please see: https://seabios.org/Releases New in this release: * SMBIOS v3.0 support on QEMU * Several bug fixes and code cleanups. For information on obtaining SeaBIOS, please see: https://seabios.org/Download ===== git shortlog -n rel-1.15.0..rel-1.16.0 ===== Eduardo Habkost (19): biostables: copy_fseg_table() function util.h: Delete unused get_smbios_entry_point() prototype smbios: Rename code specific for SMBIOS 2.1 entry points smbios: Generic smbios_next() function smbios: smbios_get_tables() function smbios: Use smbios_get_tables()/smbios_next() at display_uuid() smbios: smbios_major_version()/smbios_minor_version() helpers tpm: Use smbios_get_tables() csm: Don't check SMBios21Addr before calling copy_smbios_21() smbios: Make SMBios21Addr variable static smbios: Use smbios_next() at smbios_romfile_setup() smbios: Extract SMBIOS table building code to separate function smbios: Make smbios_build_tables() more generic smbios: smbios_21_setup_entry_point() function smbios: Make some smbios_build_tables() arguments optional smbios: Make smbios_build_tables() ready for 64-bit tables smbios: copy_smbios_30() function smbios: Support SMBIOS 3.0 entry point at copy_table() smbios: Support SMBIOS 3.0 entry point at smbios_romfile_setup() Kevin O'Connor (13): vgasrc: Don't use VAR16 in header files to fix gcc warning memmap: Fix gcc out-of-bounds warning readserial: Improve Python3 compatibility scripts: Remove python23compat.py smm: Suppress gcc array-bounds warnings nvme: Rework nvme_io_readwrite() to return -1 on error nvme: Add nvme_bounce_xfer() helper function nvme: Convert nvme_build_prpl() to nvme_prpl_xfer() nvme: Pass prp1 and prp2 directly to nvme_io_xfer() nvme: Build the page list in the existing dma buffer nvme: Only allocate one dma bounce buffer for all nvme drives sercon: Fix missing GET_LOW() to access rx_bytes docs: Note v1.16.0 release Andy Pei (3): virtio-blk: add feature VIRTIO_BLK_F_SIZE_MAX and VIRTIO_BLK_F_SEG_MAX virtio-blk: abstract a function named virtio_blk_op_one_segment to handle r/w request virtio-blk: split large IO according to size_max Igor Mammedov (2): pci: reserve resources for pcie-pci-bridge to fix regressed hotplug on q35 pci: let firmware reserve IO for pcie-pci-bridge Florian Larysch (1): nvme: fix LBA format data structure Gerd Hoffmann (1): svgamodes: add standard 4k modes Jan Beulich via SeaBIOS (1): nvme: avoid use-after-free in nvme_controller_enable()

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[PATCH v2] Add an option for debug output on the vga console
by Karl Semich 12 Mar '22

12 Mar '22

Only available if threads are disabled, to prevent an undiagnosed call16 panic. A new vga_console_active() utility function is added, and debugging output is only forwarded to the vga console if the vga console has been enabled. Only debugging output from 32bit flat regions is emitted, as vga console output is only supported from within such code. This is detected with a !MODESEGMENT check inside the debugging output code, and a new ASSERT32FLAT() check within the vga output code. This change has been briefly tested on a kfsn4-dre and in qemu, using serial debugging in the latter to verify that 16bit output appears over serial that does not appear on the vga console. Signed-off-by: Karl Semich <0xloem(a)gmail.com> --- src/Kconfig | 9 +++++++++ src/bootsplash.c | 9 +++++++++ src/output.c | 33 ++++++++++++++++++++++++++------- src/util.h | 1 + 4 files changed, 45 insertions(+), 7 deletions(-) diff --git a/src/Kconfig b/src/Kconfig index 3a8ffa1..5d2c7ab 100644 --- a/src/Kconfig +++ b/src/Kconfig @@ -571,6 +571,15 @@ menu "Debugging" provide the 32 bit address. E.g. 0xFEDC6000 for the AMD Kern (a.k.a Hudson UART). + config DEBUG_VGA_CONSOLE + depends on DEBUG_LEVEL != 0 && !THREADS + bool "VGA console debugging" + default y + help + Send debugging information to vga console. This is only displayed + after the VGA console has loaded, and only in 32 bit flat regions + of code. Requires that threads are disabled. + config DEBUG_IO depends on QEMU_HARDWARE && DEBUG_LEVEL != 0 bool "Special IO port debugging" diff --git a/src/bootsplash.c b/src/bootsplash.c index 538b316..2a93c8a 100644 --- a/src/bootsplash.c +++ b/src/bootsplash.c @@ -36,6 +36,8 @@ call16_int10(struct bregs *br) * VGA text / graphics console ****************************************************************/ +static int VgaConsoleActive = 0; + void enable_vga_console(void) { @@ -47,11 +49,18 @@ enable_vga_console(void) br.ax = 0x0003; call16_int10(&br); + VgaConsoleActive = 1; + // Write to screen. printf("SeaBIOS (version %s)\n", VERSION); display_uuid(); } +int vga_console_active(void) +{ + return VgaConsoleActive; +} + static int find_videomode(struct vbe_info *vesa_info, struct vbe_mode_info *mode_info , int width, int height, int bpp_req) diff --git a/src/output.c b/src/output.c index 0184444..6fbf4f5 100644 --- a/src/output.c +++ b/src/output.c @@ -17,12 +17,15 @@ #include "output.h" // dprintf #include "stacks.h" // call16_int #include "string.h" // memset -#include "util.h" // ScreenAndDebug +#include "util.h" // ScreenAndDebug vga_console_active struct putcinfo { void (*func)(struct putcinfo *info, char c); }; +static void __debug_putc(char c); +static void __screen_putc(char c); + /**************************************************************** * Debug output @@ -35,9 +38,8 @@ debug_banner(void) dprintf(1, "BUILD: %s\n", BUILDINFO); } -// Write a character to debug port(s). static void -debug_putc(struct putcinfo *action, char c) +__debug_putc(char c) { if (! CONFIG_DEBUG_LEVEL) return; @@ -47,6 +49,16 @@ debug_putc(struct putcinfo *action, char c) serial_debug_putc(c); } +// Write a character to debug port(s). +static void +debug_putc(struct putcinfo *action, char c) +{ + __debug_putc(c); + if (CONFIG_DEBUG_LEVEL && CONFIG_DEBUG_VGA_CONSOLE && !MODESEGMENT + && vga_console_active()) + __screen_putc(c); +} + // Flush any pending output to debug port(s). static void debug_flush(void) @@ -86,17 +98,24 @@ screenc(char c) call16_int(0x10, &br); } -// Handle a character from a printf request. static void -screen_putc(struct putcinfo *action, char c) +__screen_putc(char c) { - if (ScreenAndDebug) - debug_putc(&debuginfo, c); + ASSERT32FLAT(); if (c == '\n') screenc('\r'); screenc(c); } +// Handle a character from a printf request. +static void +screen_putc(struct putcinfo *action, char c) +{ + if (ScreenAndDebug) + __debug_putc(c); + __screen_putc(c); +} + static struct putcinfo screeninfo = { screen_putc }; diff --git a/src/util.h b/src/util.h index aff8e88..8219e0c 100644 --- a/src/util.h +++ b/src/util.h @@ -50,6 +50,7 @@ int boot_lchs_find_ata_device(struct pci_device *pci, int chanid, int slave, // bootsplash.c void enable_vga_console(void); +int vga_console_active(void); void enable_bootsplash(void); void disable_bootsplash(void); -- 2.32.0

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[PATCH] Add an option for debug output on the vga console.
by Karl Semich 12 Mar '22

12 Mar '22

Only available if threads are disabled. Only displays after the console has been loaded and from within 32bit flat regions of code. Signed-off-by: Karl Semich <0xloem(a)gmail.com> --- src/Kconfig | 9 +++++++++ src/bootsplash.c | 9 +++++++++ src/output.c | 32 +++++++++++++++++++++++++------- src/util.h | 1 + 4 files changed, 44 insertions(+), 7 deletions(-) diff --git a/src/Kconfig b/src/Kconfig index 3a8ffa1..5d2c7ab 100644 --- a/src/Kconfig +++ b/src/Kconfig @@ -571,6 +571,15 @@ menu "Debugging" provide the 32 bit address. E.g. 0xFEDC6000 for the AMD Kern (a.k.a Hudson UART). + config DEBUG_VGA_CONSOLE + depends on DEBUG_LEVEL != 0 && !THREADS + bool "VGA console debugging" + default y + help + Send debugging information to vga console. This is only displayed + after the VGA console has loaded, and only in 32 bit flat regions + of code. Requires that threads are disabled. + config DEBUG_IO depends on QEMU_HARDWARE && DEBUG_LEVEL != 0 bool "Special IO port debugging" diff --git a/src/bootsplash.c b/src/bootsplash.c index 538b316..2a93c8a 100644 --- a/src/bootsplash.c +++ b/src/bootsplash.c @@ -36,6 +36,8 @@ call16_int10(struct bregs *br) * VGA text / graphics console ****************************************************************/ +static int VgaConsoleActive = 0; + void enable_vga_console(void) { @@ -47,11 +49,18 @@ enable_vga_console(void) br.ax = 0x0003; call16_int10(&br); + VgaConsoleActive = 1; + // Write to screen. printf("SeaBIOS (version %s)\n", VERSION); display_uuid(); } +int vga_console_active(void) +{ + return VgaConsoleActive; +} + static int find_videomode(struct vbe_info *vesa_info, struct vbe_mode_info *mode_info , int width, int height, int bpp_req) diff --git a/src/output.c b/src/output.c index 0184444..27935bc 100644 --- a/src/output.c +++ b/src/output.c @@ -17,12 +17,15 @@ #include "output.h" // dprintf #include "stacks.h" // call16_int #include "string.h" // memset -#include "util.h" // ScreenAndDebug +#include "util.h" // ScreenAndDebug vga_console_active struct putcinfo { void (*func)(struct putcinfo *info, char c); }; +static void __debug_putc(char c); +static void __screen_putc(char c); + /**************************************************************** * Debug output @@ -35,9 +38,8 @@ debug_banner(void) dprintf(1, "BUILD: %s\n", BUILDINFO); } -// Write a character to debug port(s). static void -debug_putc(struct putcinfo *action, char c) +__debug_putc(char c) { if (! CONFIG_DEBUG_LEVEL) return; @@ -47,6 +49,16 @@ debug_putc(struct putcinfo *action, char c) serial_debug_putc(c); } +// Write a character to debug port(s). +static void +debug_putc(struct putcinfo *action, char c) +{ + __debug_putc(c); + if (CONFIG_DEBUG_LEVEL && CONFIG_DEBUG_VGA_CONSOLE && !MODESEGMENT + && vga_console_active()) + __screen_putc(c); +} + // Flush any pending output to debug port(s). static void debug_flush(void) @@ -86,17 +98,23 @@ screenc(char c) call16_int(0x10, &br); } -// Handle a character from a printf request. static void -screen_putc(struct putcinfo *action, char c) +__screen_putc(char c) { - if (ScreenAndDebug) - debug_putc(&debuginfo, c); if (c == '\n') screenc('\r'); screenc(c); } +// Handle a character from a printf request. +static void +screen_putc(struct putcinfo *action, char c) +{ + if (ScreenAndDebug) + __debug_putc(c); + __screen_putc(c); +} + static struct putcinfo screeninfo = { screen_putc }; diff --git a/src/util.h b/src/util.h index aff8e88..8219e0c 100644 --- a/src/util.h +++ b/src/util.h @@ -50,6 +50,7 @@ int boot_lchs_find_ata_device(struct pci_device *pci, int chanid, int slave, // bootsplash.c void enable_vga_console(void); +int vga_console_active(void); void enable_bootsplash(void); void disable_bootsplash(void); -- 2.32.0

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