SeaBIOS May 2011

seabios@seabios.org

41 participants
31 discussions

Is the SeaBIOS ELF 32 bit entry point a supported interface?
by Ian Campbell 11 May '11

11 May '11

Hi, It looks like it is but I just thought I should check, is starting SeaBIOS via the ELF entry point (post32 in romlayout.S) rather than via the 16 bit reset vector valid from the SeaBIOS point of view? I'm considering it as an option for supporting SeaBIOS inside a Xen HVM (AKA fully virtualised) guest. Currently Xen loads "hvmloader" as the initial code to run within the guest. hvmloader does some initial setup, copies the BIOS (previously ROMBIOS but there is now very early support for SeaBIOS too) into the right place and then trampolines to the 16 bit entry point. However almost all of the initial setup is (or at least seems like it will end up being once I've checked it all out) ROMBIOS specific so I am considering the option of just loading SeaBIOS directly in place of hvmloader. Cheers, Ian.

3 2

[PATCH] Add Kconfig option to specify which serial port when serial debugging.
by Kevin O'Connor 11 May '11

11 May '11

--- src/Kconfig | 6 ++++++ src/output.c | 15 +++++++-------- 2 files changed, 13 insertions(+), 8 deletions(-) diff --git a/src/Kconfig b/src/Kconfig index 0da69e6..123db01 100644 --- a/src/Kconfig +++ b/src/Kconfig @@ -371,6 +371,12 @@ menu "Debugging" default n help Send debugging information to serial port. + config DEBUG_SERIAL_PORT + depends on DEBUG_SERIAL + hex "Serial port base address" + default 0x3f8 + help + Base port for serial - generally 0x3f8, 0x2f8, 0x3e8, or 0x2e8. config SCREEN_AND_DEBUG depends on DEBUG_LEVEL != 0 diff --git a/src/output.c b/src/output.c index 4c9f95b..7c10d33 100644 --- a/src/output.c +++ b/src/output.c @@ -21,7 +21,6 @@ struct putcinfo { * Debug output ****************************************************************/ -#define DEBUG_PORT PORT_SERIAL1 #define DEBUG_TIMEOUT 100000 void @@ -31,12 +30,12 @@ debug_serial_setup(void) return; // setup for serial logging: 8N1 u8 oldparam, newparam = 0x03; - oldparam = inb(DEBUG_PORT+SEROFF_LCR); - outb(newparam, DEBUG_PORT+SEROFF_LCR); + oldparam = inb(CONFIG_DEBUG_SERIAL_PORT+SEROFF_LCR); + outb(newparam, CONFIG_DEBUG_SERIAL_PORT+SEROFF_LCR); // Disable irqs u8 oldier, newier = 0; - oldier = inb(DEBUG_PORT+SEROFF_IER); - outb(newier, DEBUG_PORT+SEROFF_IER); + oldier = inb(CONFIG_DEBUG_SERIAL_PORT+SEROFF_IER); + outb(newier, CONFIG_DEBUG_SERIAL_PORT+SEROFF_IER); if (oldparam != newparam || oldier != newier) dprintf(1, "Changing serial settings was %x/%x now %x/%x\n" @@ -50,11 +49,11 @@ debug_serial(char c) if (!CONFIG_DEBUG_SERIAL) return; int timeout = DEBUG_TIMEOUT; - while ((inb(DEBUG_PORT+SEROFF_LSR) & 0x60) != 0x60) + while ((inb(CONFIG_DEBUG_SERIAL_PORT+SEROFF_LSR) & 0x60) != 0x60) if (!timeout--) // Ran out of time. return; - outb(c, DEBUG_PORT+SEROFF_DATA); + outb(c, CONFIG_DEBUG_SERIAL_PORT+SEROFF_DATA); } // Make sure all serial port writes have been completely sent. @@ -64,7 +63,7 @@ debug_serial_flush(void) if (!CONFIG_DEBUG_SERIAL) return; int timeout = DEBUG_TIMEOUT; - while ((inb(DEBUG_PORT+SEROFF_LSR) & 0x40) != 0x40) + while ((inb(CONFIG_DEBUG_SERIAL_PORT+SEROFF_LSR) & 0x40) != 0x40) if (!timeout--) // Ran out of time. return; -- 1.7.4.4

1 0

[PATCH] Add config option (CONFIG_BOOTORDER) to disable bootorder support.
by Kevin O'Connor 11 May '11

11 May '11

--- src/Kconfig | 7 +++++++ src/boot.c | 15 +++++++++++++++ 2 files changed, 22 insertions(+), 0 deletions(-) diff --git a/src/Kconfig b/src/Kconfig index 3133d88..0da69e6 100644 --- a/src/Kconfig +++ b/src/Kconfig @@ -51,6 +51,13 @@ menu "General Features" default y help Support showing a graphical boot splash screen. + config BOOTORDER + depends on BOOT + bool "Boot ordering" + default y + help + Support controlling of the boot order via the fw_cfg/CBFS + "bootorder" file. config COREBOOT_FLASH depends on COREBOOT diff --git a/src/boot.c b/src/boot.c index 1cd4126..9a67916 100644 --- a/src/boot.c +++ b/src/boot.c @@ -26,6 +26,9 @@ static int BootorderCount; static void loadBootOrder(void) { + if (!CONFIG_BOOTORDER) + return; + char *f = romfile_loadfile("bootorder", NULL); if (!f) return; @@ -121,6 +124,8 @@ build_pci_path(char *buf, int max, const char *devname, int bdf) int bootprio_find_pci_device(int bdf) { + if (!CONFIG_BOOTORDER) + return -1; // Find pci device - for example: /pci@i0cf8/ethernet@5 char desc[256]; build_pci_path(desc, sizeof(desc), "*", bdf); @@ -129,6 +134,8 @@ int bootprio_find_pci_device(int bdf) int bootprio_find_ata_device(int bdf, int chanid, int slave) { + if (!CONFIG_BOOTORDER) + return -1; if (bdf == -1) // support only pci machine for now return -1; @@ -141,6 +148,8 @@ int bootprio_find_ata_device(int bdf, int chanid, int slave) int bootprio_find_fdc_device(int bdf, int port, int fdid) { + if (!CONFIG_BOOTORDER) + return -1; if (bdf == -1) // support only pci machine for now return -1; @@ -153,6 +162,8 @@ int bootprio_find_fdc_device(int bdf, int port, int fdid) int bootprio_find_pci_rom(int bdf, int instance) { + if (!CONFIG_BOOTORDER) + return -1; // Find pci rom - for example: /pci@i0cf8/scsi@3:rom2 char desc[256], *p; p = build_pci_path(desc, sizeof(desc), "*", bdf); @@ -163,6 +174,8 @@ int bootprio_find_pci_rom(int bdf, int instance) int bootprio_find_named_rom(const char *name, int instance) { + if (!CONFIG_BOOTORDER) + return -1; // Find named rom - for example: /rom(a)genroms/linuxboot.bin char desc[256], *p; p = desc + snprintf(desc, sizeof(desc), "/rom@%s", name); @@ -173,6 +186,8 @@ int bootprio_find_named_rom(const char *name, int instance) int bootprio_find_usb(int bdf, u64 path) { + if (!CONFIG_BOOTORDER) + return -1; // Find usb - for example: /pci@i0cf8/usb@1,2/hub@1/network@0/ethernet@0 int i; char desc[256], *p; -- 1.7.4.4

1 0

Non-PNP legacy option rom scan and init
by Sebastian Herbszt 09 May '11

09 May '11

SeaBIOS doesn't seem to call non-PNP legacy option roms and handles them like BCV. I think this behaviour is incorrect because non-PNP legacy option roms should get called without exceptions. Sebastian

2 7

[PATCH] Move ps2ctr manipulation from mouse.c to ps2port.c.
by Kevin O'Connor 08 May '11

08 May '11

This simplifies the mouse.c code. It also prevents USB mouse interaction from changing the ps2 port setup. --- src/mouse.c | 24 +++--------------------- src/ps2port.c | 11 +++++++++++ 2 files changed, 14 insertions(+), 21 deletions(-) diff --git a/src/mouse.c b/src/mouse.c index 09273b0..e26cf69 100644 --- a/src/mouse.c +++ b/src/mouse.c @@ -37,23 +37,11 @@ mouse_command(int command, u8 *param) #define RET_ENEEDRESEND 0x04 #define RET_ENOHANDLER 0x05 -static int -disable_mouse(u16 ebda_seg) -{ - u8 ps2ctr = GET_EBDA2(ebda_seg, ps2ctr); - ps2ctr |= I8042_CTR_AUXDIS; - ps2ctr &= ~I8042_CTR_AUXINT; - SET_EBDA2(ebda_seg, ps2ctr, ps2ctr); - - return mouse_command(PSMOUSE_CMD_DISABLE, NULL); -} - // Disable Mouse static void mouse_15c20000(struct bregs *regs) { - u16 ebda_seg = get_ebda_seg(); - int ret = disable_mouse(ebda_seg); + int ret = mouse_command(PSMOUSE_CMD_DISABLE, NULL); if (ret) set_code_invalid(regs, RET_ENEEDRESEND); else @@ -64,18 +52,12 @@ mouse_15c20000(struct bregs *regs) static void mouse_15c20001(struct bregs *regs) { - u16 ebda_seg = get_ebda_seg(); - u8 mouse_flags_2 = GET_EBDA2(ebda_seg, mouse_flag2); + u8 mouse_flags_2 = GET_EBDA(mouse_flag2); if ((mouse_flags_2 & 0x80) == 0) { set_code_invalid(regs, RET_ENOHANDLER); return; } - u8 ps2ctr = GET_EBDA2(ebda_seg, ps2ctr); - ps2ctr &= ~I8042_CTR_AUXDIS; - ps2ctr |= I8042_CTR_AUXINT; - SET_EBDA2(ebda_seg, ps2ctr, ps2ctr); - int ret = mouse_command(PSMOUSE_CMD_ENABLE, NULL); if (ret) set_code_invalid(regs, RET_ENEEDRESEND); @@ -250,7 +232,7 @@ mouse_15c207(struct bregs *regs) /* remove handler */ if ((mouse_flags_2 & 0x80) != 0) { mouse_flags_2 &= ~0x80; - disable_mouse(ebda_seg); + mouse_command(PSMOUSE_CMD_DISABLE, NULL); } } else { /* install handler */ diff --git a/src/ps2port.c b/src/ps2port.c index d1e6d48..81d47c9 100644 --- a/src/ps2port.c +++ b/src/ps2port.c @@ -327,6 +327,17 @@ ps2_kbd_command(int command, u8 *param) int ps2_mouse_command(int command, u8 *param) { + // Update ps2ctr for mouse enable/disable. + if (command == PSMOUSE_CMD_ENABLE || command == PSMOUSE_CMD_DISABLE) { + u16 ebda_seg = get_ebda_seg(); + u8 ps2ctr = GET_EBDA2(ebda_seg, ps2ctr); + if (command == PSMOUSE_CMD_ENABLE) + ps2ctr = (ps2ctr | I8042_CTR_AUXINT) & ~I8042_CTR_AUXDIS; + else + ps2ctr = (ps2ctr | I8042_CTR_AUXDIS) & ~I8042_CTR_AUXINT; + SET_EBDA2(ebda_seg, ps2ctr, ps2ctr); + } + return ps2_command(1, command, param); } -- 1.7.4.4

1 0

[PATCH] Fix struct bregs - it shouldn't have multiple members with the same name.
by Kevin O'Connor 08 May '11

08 May '11

This fixes a compile error on gcc 4.6. --- src/bregs.h | 6 +++--- 1 files changed, 3 insertions(+), 3 deletions(-) diff --git a/src/bregs.h b/src/bregs.h index 9a381d0..f026fa8 100644 --- a/src/bregs.h +++ b/src/bregs.h @@ -37,9 +37,9 @@ struct bregs { u16 ds; u16 es; - UREG(edi, di, di_hi, di_lo); - UREG(esi, si, si_hi, si_lo); - UREG(ebp, bp, bp_hi, bp_lo); + UREG(edi, di, di8u, di8l); + UREG(esi, si, si8u, si8l); + UREG(ebp, bp, bp8u, bp8l); UREG(ebx, bx, bh, bl); UREG(edx, dx, dh, dl); UREG(ecx, cx, ch, cl); -- 1.7.4.4

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[PATCH] Add DMI configuration
by Sven Schnelle 07 May '11

07 May '11

This patch adds configuration for DMI configuration data. This is useful if you want to run SeaBIOS on real Hardware, and the OS selects drivers based on hw manufacturer/model. Signed-off-by: Sven Schnelle <svens(a)stackframe.org> --- src/Kconfig | 26 ++++++++++++++++++++++++++ src/config.h | 1 - src/smbios.c | 15 +++++++-------- 3 files changed, 33 insertions(+), 9 deletions(-) diff --git a/src/Kconfig b/src/Kconfig index 6d55b23..db88e22 100644 --- a/src/Kconfig +++ b/src/Kconfig @@ -368,3 +368,29 @@ menu "Debugging" Send characters that SeaBIOS writes to the screen to the debug ports. endmenu + +menu "DMI data" + config DMI_BIOS_VENDOR + string "BIOS Vendor" + default "Bochs" + + config DMI_BIOS_VERSION + string "BIOS Version" + default "1.0" + + config DMI_BIOS_RELEASE_DATE + string "BIOS release date" + default "01/01/2007" + + config DMI_MANUFACTURER + string "Hardware Manufacturer" + default "Unknown" + + config DMI_PRODUCT_NAME + string "Hardware Product name" + default "Unknown" + + config DMI_PROCESSOR_VENDOR + string "Processor vendor" + default "Unknown" +endmenu diff --git a/src/config.h b/src/config.h index 5b40488..5249d0f 100644 --- a/src/config.h +++ b/src/config.h @@ -9,7 +9,6 @@ //#define CONFIG_CPUNAME8 "QEMUCPU " //#define CONFIG_APPNAME6 "QEMU " //#define CONFIG_APPNAME4 "QEMU" -#define CONFIG_APPNAME "Bochs" #define CONFIG_CPUNAME8 "BOCHSCPU" #define CONFIG_APPNAME6 "BOCHS " #define CONFIG_APPNAME4 "BXPC" diff --git a/src/smbios.c b/src/smbios.c index 8df0f2d..df3b687 100644 --- a/src/smbios.c +++ b/src/smbios.c @@ -84,7 +84,6 @@ smbios_entry_point_init(u16 max_structure_size, } while (0) /* Type 0 -- BIOS Information */ -#define RELEASE_DATE_STR "01/01/2007" static void * smbios_init_type_0(void *start) { @@ -97,12 +96,12 @@ smbios_init_type_0(void *start) p->header.length = sizeof(struct smbios_type_0); p->header.handle = 0; - load_str_field_with_default(0, vendor_str, CONFIG_APPNAME); - load_str_field_with_default(0, bios_version_str, CONFIG_APPNAME); + load_str_field_with_default(0, vendor_str, CONFIG_DMI_BIOS_VENDOR); + load_str_field_with_default(0, bios_version_str, CONFIG_DMI_BIOS_VERSION); p->bios_starting_address_segment = 0xe800; - load_str_field_with_default(0, bios_release_date_str, RELEASE_DATE_STR); + load_str_field_with_default(0, bios_release_date_str, CONFIG_DMI_BIOS_RELEASE_DATE); p->bios_rom_size = 0; /* FIXME */ @@ -146,8 +145,8 @@ smbios_init_type_1(void *start) p->header.length = sizeof(struct smbios_type_1); p->header.handle = 0x100; - load_str_field_with_default(1, manufacturer_str, CONFIG_APPNAME); - load_str_field_with_default(1, product_name_str, CONFIG_APPNAME); + load_str_field_with_default(1, manufacturer_str, CONFIG_DMI_MANUFACTURER); + load_str_field_with_default(1, product_name_str, CONFIG_DMI_PRODUCT_NAME); load_str_field_or_skip(1, version_str); load_str_field_or_skip(1, serial_number_str); @@ -184,7 +183,7 @@ smbios_init_type_3(void *start) p->header.length = sizeof(struct smbios_type_3); p->header.handle = 0x300; - load_str_field_with_default(3, manufacturer_str, CONFIG_APPNAME); + load_str_field_with_default(3, manufacturer_str, CONFIG_DMI_MANUFACTURER); set_field_with_default(3, type, 0x01); /* other */ load_str_field_or_skip(3, version_str); @@ -240,7 +239,7 @@ smbios_init_type_4(void *start, unsigned int cpu_number) set_field_with_default(4, processor_type, 0x03); /* CPU */ set_field_with_default(4, processor_family, 0x01); /* other */ - load_str_field_with_default(4, processor_manufacturer_str, CONFIG_APPNAME); + load_str_field_with_default(4, processor_manufacturer_str, CONFIG_DMI_PROCESSOR_VENDOR); if (!qemu_cfg_smbios_load_field(4, offsetof(struct smbios_type_4, processor_id), p->processor_id)) { -- 1.7.4.1

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Re: [SeaBIOS] [Xen-devel] GSoC Introduction: Add Xen PV block device support to SeaBIOS
by Ian Campbell 06 May '11

06 May '11

On Fri, 2011-05-06 at 11:25 +0100, Daniel Castro wrote: > Good Day to all, > > My Name is Daniel Castro I am going to be your google coder for this summer in: > > Add Xen PV block device support to SeaBIOS Thanks Daniel and Welcome! I'll be mentoring Daniel in this project. (I've taken the liberty of CCing the SeaBIOS and qemu lists for their information). Cheers, Ian. > > About Me: > This is my first time in Google Summer of Code and my first time > contributing to an open source project. I hope I will keep > contributing for many years to come to Xen Hypervisor. I was born and > raised in Colombia and currently a PhD candidate in South Korea. I > worked with Citrix XenServer for several years, but never worked with > the open source version, and I have big expectations for Xen. > > The Project: > Currently Xen is using for HVM Virtual machines a version of BIOS > called ROMBIOS. Xen is going to introduce SeaBIOS (and upstream > qemu), which happens to also be the qemu upstream and KVM BIOS of > Choice. Then a modification to SeaBIOS hard drive abstract layer will > be done to use the PV Drivers instead of the emulated device used in > qemu-dm. > Once SeaBIOS is in place my work starts as follows: > We are going to provide PV frontend drivers for SeaBIOS in order to > discourage the use of the emulated device. Removing the emulated > device also removes the subtle confusion that can arise from booting > from one device (emulated) but (apparently) running from another (PV > frontend). Around July we will present the community with a patch(s) > that will enable to test this new functionality. Test for each kind of > VM (Windows HVM VMs) will be done and a compatibility matrix will be > presented as part of the usual documentation. > All activities and reports will be posted on: > http://wiki.xensource.com/xenwiki/SeaBIOS > > All questions or/and suggestions are very welcome, > Thank you, > Daniel >

1 0

Re: [SeaBIOS] [PATCH] Support more than one vga card
by Kevin O'Connor 06 May '11

06 May '11

On Thu, May 05, 2011 at 12:44:04PM +0000, Mark Marshall wrote: > > Not having access to the very beginning of the boot really limited > > sgabios' capabilities, so the "vgaroms/" trick was added to SeaBIOS. > > (In particular, one couldn't change the boot order on a real machine.) > > It's ~3 lines of code though. > > I'm a bit confused here. If we run sgabios with the other non-VGA > option ROMS do we lose the boot menu? I would image that the boot > menu would come after all option ROMs have been run? Does sgabios > work with legacy BIOS's (I assume as a non-VGA ROM)? The main execution of option ROMs is after the boot menu. The boot menu determines the order in which option ROMs are executed so that one can control the boot order. > I always assumed that the boot sequence was this: > - do some HW initialisation > - load first VGA option ROM + execute VGA option ROM > - do some more HW initialisation > - load all non-VGA option ROMS > - show boot menu + execute non-VGA option ROMS A PNP option ROM is invoked twice - once during the "load" stage, and once during the "execute" stage (for BCVs; BEVs would be executed a second time during boot phase). A PNP option ROM isn't supposed to hook any interrupts during the "load" stage. A non-PNP ROM is only executed once (in the "execute" stage). SeaBIOS' boot order can be seen in post.c:maininit(). -Kevin

1 0

[PATCH v2] Make pci memory window configurable.
by Gerd Hoffmann 05 May '11

05 May '11

This patch makes the memory window for PCI memory bars configurable via Kconfig. [ v2: handle old pcimem assignment method ] Signed-off-by: Gerd Hoffmann <kraxel(a)redhat.com> --- src/Kconfig | 10 ++++++++++ src/config.h | 9 ++++----- 2 files changed, 14 insertions(+), 5 deletions(-) diff --git a/src/Kconfig b/src/Kconfig index 6d55b23..91a89e3 100644 --- a/src/Kconfig +++ b/src/Kconfig @@ -187,6 +187,16 @@ menu "Hardware support" depends on EXTRA_PCI_ROOTS hex "Extra secondary PCI root bus number" default 0x00 + config PCIMEM_ENABLE_PREFETCH + bool "Use separate window for prefetchable PCI memory" + default y + config PCIMEM_START + hex "PCI memory window start address" + default 0xf0000000 + config PCIMEM_SIZE + depends on PCIMEM_ENABLE_PREFETCH + hex "PCI memory window size for non-prefetchable memory" + default 0x08000000 config USE_SMM depends on !COREBOOT diff --git a/src/config.h b/src/config.h index 5b40488..2aa14c5 100644 --- a/src/config.h +++ b/src/config.h @@ -47,18 +47,17 @@ #define BUILD_BIOS_TMP_ADDR 0x30000 #define BUILD_MAX_HIGHMEM 0xe0000000 +#ifndef CONFIG_PCIMEM_ENABLE_PREFETCH // Support old pci mem assignment behaviour -//#define CONFIG_OLD_PCIMEM_ASSIGNMENT 1 -#if CONFIG_OLD_PCIMEM_ASSIGNMENT -#define BUILD_PCIMEM_START 0xf0000000 +#define BUILD_PCIMEM_START CONFIG_PCIMEM_START #define BUILD_PCIMEM_SIZE (BUILD_PCIMEM_END - BUILD_PCIMEM_START) #define BUILD_PCIMEM_END 0xfec00000 /* IOAPIC is mapped at */ #define BUILD_PCIPREFMEM_START 0 #define BUILD_PCIPREFMEM_SIZE 0 #define BUILD_PCIPREFMEM_END 0 #else -#define BUILD_PCIMEM_START 0xf0000000 -#define BUILD_PCIMEM_SIZE 0x08000000 /* half- of pci window */ +#define BUILD_PCIMEM_START CONFIG_PCIMEM_START +#define BUILD_PCIMEM_SIZE CONFIG_PCIMEM_SIZE #define BUILD_PCIMEM_END (BUILD_PCIMEM_START + BUILD_PCIMEM_SIZE) #define BUILD_PCIPREFMEM_START BUILD_PCIMEM_END #define BUILD_PCIPREFMEM_SIZE (BUILD_PCIPREFMEM_END - BUILD_PCIPREFMEM_START) -- 1.7.1

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SeaBIOS May 2011