path: root/arch/x86
AgeCommit message (Collapse)Author
2012-01-04x86: Speed up copy-to-RAM and clear BSS operationsGraeme Russ
The implementations of memcpy and memset are now the optimised versions from glibc, so use them instead of simple copy loops -- Changes for v2: - Removed unneeded brackets
2012-01-02x86: Import glibc memcpy implementationGraeme Russ
Taken from glibc version 2.14.90 -- Changes for v2: - None
2011-12-19x86: Add support for specifying an initrd with the zboot commandGabe Black
This change finishes plumbing the initrd support built into the zboot mechanism out to the command interface. It also fixes a bug in the command declaration where the kernel size could be passed as an optional second parameter but not enough arguments were allowed. Signed-off-by: Gabe Black <gabeblack@chromium.org>
2011-12-19x86: Refactor the zboot innards so they can be reused with a vboot imageGabe Black
If vboot successfully verifies a kernel, it will leave it in place and basically ready to boot. The zeropage table which is part of the x86 boot protocol is at the end of the kernel, though, instead of the beginning, and because the image is already in place there's no need to copy it around. This change refactors the code which implements the zboot command so that the configuration of the zeropage table and loading the pieces of the kernel into memory are done separately. Also, because the command line goes before the zeropage table in vboot which is somewhat incompatible with the normal protocol, where to put the command line is a now a parameter instead of being hard coded. Signed-off-by: Gabe Black <gabeblack@chromium.org>
2011-12-19x86: Add infrastructure to extract an e820 table from the coreboot tablesGabe Black
Also approximate the size of RAM using the largest RAM address available in the tables. There may be areas which are marked as reserved which are actually at the end of RAM. Signed-off-by: Gabe Black <gabeblack@chromium.org>
2011-12-19x86: Add support for booting Linux using the 32 bit boot protocolGabe Black
This change conditionally modifies the zboot command so that it can use the 32 bit boot protocol. This is necessary because the 16 bit realmode entry point assumes that it can call BIOS services which neither coreboot nor u-boot provide. Signed-off-by: Gabe Black <gabeblack@chromium.org>
2011-12-19x86: Clean up the x86 zimage code in preparation to extend itGabe Black
This change cleans up some formatting issues in the zimage handling code, and converts it from using offsets added to a base pointer to using the available structure definitions which were already being included. Signed-off-by: Gabe Black <gabeblack@chromium.org>
2011-12-19x86: Import code from coreboot's libpayload to parse the coreboot tableGabe Black
This change also forces the lib_sysinfo structure to be in the .data section. Otherwise it ends up in the .bss section. U-boot assumes that it doesn't need to copy it over during relocation, and instead fills that whole section with zeroes. If we really were booting from ROM that would be appropriate, but we need some information from the coreboot tables (memory size) before then and have to fill that structure before relocation. We skirt u-boot's assumption by putting this in .data where it assumes there is still read only but non-zero data. Signed-off-by: Gabe Black <gabeblack@chromium.org>
2011-12-19x86: Initial commit for running as a coreboot payloadGabe Black
Add a target for running u-boot as a coreboot payload in boards.cfg, a board, CPU and a config. This is a skeleton implementation which always reports the size of memory as 64 MB. Signed-off-by: Gabe Black <gabeblack@chromium.org>
2011-11-29x86: Wrap small helper functions from libgcc to avoid an ABI mismatchGabe Black
When gcc compiles some 64 bit operations on a 32 bit machine, it generates calls to small functions instead of instructions which do the job directly. Those functions are defined in libgcc and transparently provide whatever functionality was necessary. Unfortunately, u-boot can be built with a non-standard ABI when libgcc isn't. More specifically, u-boot uses -mregparm. When the u-boot and libgcc are linked together, very confusing bugs can crop up, for instance seemingly normal integer division or modulus getting the wrong answer or even raising a spurious divide by zero exception. This change borrows (steals) a technique and some code from coreboot which solves this problem by creating wrappers which translate the calling convention when calling the functions in libgcc. Unfortunately that means that these instructions which had already been turned into functions have even more overhead, but more importantly it makes them work properly. To find all of the functions that needed wrapping, u-boot was compiled without linking in libgcc. All the symbols the linker complained were undefined were presumed to be the symbols that are needed from libgcc. These were a subset of the symbols covered by the coreboot code, so it was used unmodified. To prevent symbols which are provided by libgcc but not currently wrapped (or even known about) from being silently linked against by code generated by libgcc, a new copy of libgcc is created where all the symbols are prefixed with __normal_. Without being purposefully wrapped, these symbols will cause linker errors instead of silently introducing very subtle, confusing bugs. Another approach would be to whitelist symbols from libgcc and strip out all the others. The problem with this approach is that it requires the white listed symbols to be specified three times, once for objcopy, once so the linker inserts the wrapped, and once to generate the wrapper itself, while this implementation needs it to be listed only twice. There isn't much tangible difference in what each approach produces, so this one was preferred. Signed-off-by: Gabe Black <gabeblack@chromium.org>
2011-11-29x86: Import the glibc memset implementationGabe Black
The new implementation is about twice as fast as the old. This is from glibc-2.14, sysdeps/i386/memset.c. Signed-off-by: Gabe Black <gabeblack@chromium.org>
2011-11-29x86: Fix a few recently added bugsGabe Black
Signed-off-by: Gabe Black <gabeblack@chromium.org> Signed-off-by: Graeme Russ <graeme.russ@gmail.com>
2011-11-29x86: Don't relocate symbols which point to things that aren't relocatedGabe Black
This change adds an upper bound for symbols which are fixed up after u-boot is relocated into RAM. This way portions that are left at their original location can be referred to without having to manually fix up any pointers. Signed-off-by: Gabe Black <gabeblack@chromium.org>
2011-11-29x86: Fix how the location of the realmode and bios blobs are calculatedGabe Black
There are two blobs embedded into the u-boot image which are linked to run at an address which is different from where they actually end up in the ROM, one called "realmode" and one called "bios". There are realmode_setup and bios_setup functions which prepare those blobs by copying them into the location they're supposed to run from, among other things. During u-boot relocation from ROM to RAM, the text and a few data segments are copied over. The realmode and bios sections are not copied, and so the only place they can be read from is their original location in the ROM. Looking specifically at the bios blob, there are symbols defined in the linker script called __bios_start and __bios_size which are defined to be the start and size of the blob in the ROM. In the bios_setup function, there seem to be two mistakes happening. First, the offset from ROM to RAM is being added to __bios_start which implies that this code expects to use the copy moved to RAM. No such copy is made, so that's wrong. More subtly, when u-boot relocates itself, it goes through all of the relocations stored in .rel.dyn and fixes them up. This has the effect of transforming the __bios_start reference in bios_setup so that it refers to the version in RAM (if one existed) instead of the one in ROM. To correct for that, the offset actually needs to be subtracted out again to translate the address back into the ROM. The net effect is that for both blobs, a + needs to be changed to a -. Signed-off-by: Gabe Black <gabeblack@chromium.org>
2011-11-29x86: Misc cleanupsGraeme Russ
Signed-off-by: Graeme Russ <graeme.russ@gmail.com>
2011-11-29x86: Misc PCI touchupsGraeme Russ
Signed-off-by: Graeme Russ <graeme.russ@gmail.com>
2011-11-29x86: Ensure IDT and GDT remain 16-byte aligned post relocationGraeme Russ
Some CPUs have strict alignment requirements for these tables Signed-off-by: Graeme Russ <graeme.russ@gmail.com>
2011-11-29x86: Provide more configuration granularityGraeme Russ
Planned future ports requires more granularity for some options Signed-off-by: Graeme Russ <graeme.russ@gmail.com>
2011-11-29x86: Add multiboot headerGraeme Russ
By adding a multiboot header, U-Boot can be loaded by GRUB2. Using GRUB2 to bootstrap U-Boot is useful for using an existing BIOS to get an initial U-Boot port up and running before implementing the low-level reset vector code, SDRAM init, etc. and overwriting the BIOS Signed-off-by: Graeme Russ <graeme.russ@gmail.com>
2011-11-29sc520: Create arch asm-offsetsGraeme Russ
Signed-off-by: Graeme Russ <graeme.russ@gmail.com>
2011-11-29x86: Punt cold- and warm-boot flagsGraeme Russ
Nobody uses them anyway Signed-off-by: Graeme Russ <graeme.russ@gmail.com> Acked-by: Mike Frysinger <vapier@gentoo.org>
2011-11-29cosmetic: checkpatch cleanup of arch/x86/lib/*.cGraeme Russ
Signed-off-by: Graeme Russ <graeme.russ@gmail.com>
2011-11-29cosmetic: checkpatch cleanup of arch/x86/cpu/sc520/*.cGraeme Russ
Signed-off-by: Graeme Russ <graeme.russ@gmail.com>
2011-11-29cosmetic: checkpatch cleanup of arch/x86/cpu/*.cGraeme Russ
Signed-off-by: Graeme Russ <graeme.russ@gmail.com>
2011-11-29x86: Call hang() on unrecoverable exceptionGraeme Russ
Signed-off-by: Graeme Russ <graeme.russ@gmail.com>
2011-11-03Reduce build timesWolfgang Denk
U-Boot Makefiles contain a number of tests for compiler features etc. which so far are executed again and again. On some architectures (especially ARM) this results in a large number of calls to gcc. This patch makes sure to run such tests only once, thus largely reducing the number of "execve" system calls. Example: number of "execve" system calls for building the "P2020DS" (Power Architecture) and "qong" (ARM) boards, measured as: -> strace -f -e trace=execve -o /tmp/foo ./MAKEALL <board> -> grep execve /tmp/foo | wc -l Before: After: Reduction: ================================== P2020DS 20555 15205 -26% qong 31692 14490 -54% As a result, built times are significantly reduced, typically by 30...50%. Signed-off-by: Wolfgang Denk <wd@denx.de> Cc: Andy Fleming <afleming@gmail.com> Cc: Kumar Gala <galak@kernel.crashing.org> Cc: Albert Aribaud <albert.aribaud@free.fr> cc: Graeme Russ <graeme.russ@gmail.com> cc: Mike Frysinger <vapier@gentoo.org> Tested-by: Graeme Russ <graeme.russ@gmail.com> Tested-by: Matthias Weisser <weisserm@arcor.de> Tested-by: Sanjeev Premi <premi@ti.com> Tested-by: Simon Glass <sjg@chromium.org> Tested-by: Macpaul Lin <macpaul@gmail.com> Acked-by: Mike Frysinger <vapier@gentoo.org>
2011-11-02x86: Fix a compiler warning in arch/x86/lib/realmode.cGabe Black
Ensure that the value being passed to a %d format specifier is of type int. Signed-off-by: Gabe Black <gabeblack@chromium.org>
2011-11-02x86: Remove the prototype for the unused function board_initGabe Black
Signed-off-by: Gabe Black <gabeblack@chromium.org>
2011-11-02x86: Rename include/asm/ic to include/asm/arch-sc520Graeme Russ
Also include some trivial related cleanups
2011-11-02x86: turn off cache: set control register properlyOndrej Kupka
Bits should be ORed when they are supposed to be added together Signed-off-by: Ondrej Kupka <ondra.cap@gmail.com>
2011-10-23x86: Use getenv_ulong() in place of getenv(), strtoulSimon Glass
This changes the board code to use the new getenv_ulong() function. Signed-off-by: Simon Glass <sjg@chromium.org>
2011-10-23x86: cache: define ARCH_DMA_MINALIGN for DMA buffer alignmentAnton Staaf
Signed-off-by: Anton Staaf <robotboy@chromium.org> Cc: Mike Frysinger <vapier@gentoo.org> Cc: Lukasz Majewski <l.majewski@samsung.com> Cc: Graeme Russ <graeme.russ@gmail.com>
2011-10-05net: drop !NET_MULTI codeMike Frysinger
This is long over due. All but two net drivers have been converted, but those have now been dropped. The only thing left to do is actually delete all references to NET_MULTI and code that is compiled when that is not defined. So here we scrub the core code. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2011-10-05image: push default arch values to arch headersMike Frysinger
This pushes the ugly duplicated arch ifdef lists we maintain in various image related files out to the arch headers themselves. Acked-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org> Tested-by: Thomas Chou <thomas@wytron.com.tw> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2011-10-05console: Implement pre-console bufferGraeme Russ
Allow redirection of console output prior to console initialisation to a temporary buffer. To enable this functionality, the board (or arch) must define: - CONFIG_PRE_CONSOLE_BUFFER - Enable pre-console buffer - CONFIG_PRE_CON_BUF_ADDR - Base address of pre-console buffer - CONFIG_PRE_CON_BUF_SZ - Size of pre-console buffer (in bytes) The pre-console buffer will buffer the last CONFIG_PRE_CON_BUF_SZ bytes Any earlier characters are silently dropped.
2011-08-04Convert ISO-8859 files to UTF-8Albert ARIBAUD
There was a mix of UTF-8 and ISO-8859 files in the U-Boot source tree, which could cause issues with the patchwork review system. This commit converts all ISO-8859 files to UTF-8. Signed-off-by: Albert ARIBAUD <albert.u.boot@aribaud.net>
2011-08-01Unify timer_init() and cpu_init() prototypesWolfgang Denk
Clean up some duplicated prototype declarations. Get rid of now useless AVR32 initcalls.h file. Signed-off-by: Wolfgang Denk <wd@denx.de> Cc: Albert Aribaud <albert.aribaud@free.fr> Cc: Haavard Skinnemoen <haavard.skinnemoen@atmel.com> Cc: Graeme Russ <graeme.russ@gmail.com>
2011-07-28cleanup: Fix typos and misspellings in various files.Mike Williams
Recieve/Receive recieve/receive Interupt/Interrupt interupt/interrupt Addres/Address addres/address Signed-off-by: Mike Williams <mike@mikebwilliams.com>
2011-07-28unify version_stringAndreas Bie├čmann
This patch removes the architecture specific implementation of version_string where possible. Some architectures use a special place and therefore we provide U_BOOT_VERSION_STRING definition and a common weak symbol version_string. Signed-off-by: Andreas Bie▀mann <andreas.devel@googlemail.com> CC: Mike Frysinger <vapier@gentoo.org> CC: Peter Pan <pppeterpppan@gmail.com> Acked-by: Mike Frysinger <vapier@gentoo.org>
2011-07-26Timer: Remove reset_timer() for non-Nios2 archesGraeme Russ
2011-07-26Timer: Remove set_timer completelyGraeme Russ
2011-05-19Minor coding style cleanup.Wolfgang Denk
Signed-off-by: Wolfgang Denk <wd@denx.de>
2011-04-30Handle most LDSCRIPT setting centrallyScott Wood
Currently, some linker scripts are found by common code in config.mk. Some are found using CONFIG_SYS_LDSCRIPT, but the code for that is sometimes in arch config.mk and sometimes in board config.mk. Some are found using an arch-specific rule for looking in CPUDIR, etc. Further, the powerpc config.mk rule relied on CONFIG_NAND_SPL when it really wanted CONFIG_NAND_U_BOOT -- which covered up the fact that not all NAND_U_BOOT builds actually wanted CPUDIR/u-boot-nand.lds. Replace all of this -- except for a handful of boards that are actually selecting a linker script in a unique way -- with centralized ldscript finding. If board code specifies LDSCRIPT, that will be used. Otherwise, if CONFIG_SYS_LDSCRIPT is specified, that will be used. If neither of these are specified, then the central config.mk will check for the existence of the following, in order: $(TOPDIR)/board/$(BOARDDIR)/u-boot-nand.lds (only if CONFIG_NAND_U_BOOT) $(TOPDIR)/$(CPUDIR)/u-boot-nand.lds (only if CONFIG_NAND_U_BOOT) $(TOPDIR)/board/$(BOARDDIR)/u-boot.lds $(TOPDIR)/$(CPUDIR)/u-boot.lds Some boards (sc3, cm5200, munices) provided their own u-boot.lds that were dead code, because they were overridden by a CPUDIR u-boot.lds under the old powerpc rules. These boards' own u-boot.lds have bitrotted and no longer work -- these lds files have been removed. Signed-off-by: Scott Wood <scottwood@freescale.com> Tested-by: Graeme Russ <graeme.russ@gmail.com>
2011-04-13sc520: Move reset to stand-alone fileGraeme Russ
Partial linking allows weak functions to be overridden in files containing only one function. Moving the sc520 override of reset_cpu gets rid of an ugly #ifdef Signed-off-by: Graeme Russ <graeme.russ@gmail.com>
2011-04-13x86: Rename i386 to x86Graeme Russ
Signed-off-by: Graeme Russ <graeme.russ@gmail.com>