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* x86: Use fs for global dataGraeme Russ2012-01-04-23/+38
| | | | | | | | | | | | | | | | | | | | | | Use the base address of the 'F' segment as a pointer to the global data structure. By adding the linear address (i.e. the 'D' segment address) as the first word of the global data structure, the address of the global data relative to the 'D' segment can be found simply, for example, by: fs movl 0, %eax This makes the gd 'pointer' writable prior to relocation (by reloading the Global Desctriptor Table) which brings x86 into line with all other arches NOTE: Writing to the gd 'pointer' is expensive (but we only do it twice) but using it to access global data members (read and write) is still fairly cheap -- Changes for v2: - Rebased against changes made to patch #3 - Removed extra indent - Tweaked commit message
* x86: Simplify Flash-to-RAM code execution transitionGraeme Russ2012-01-04-16/+6
| | | | | | | | | | | Move the relocation offset calculation out of assembler and into C. This also paves the way for the upcoming init sequence simplification by adding the board_init_f_r flash to RAM transitional function -- Changes for v2: - Added commit message - Minor adjustment to new stack address comment
* x86: Rework Global Descriptor Table loadingGraeme Russ2012-01-04-29/+53
| | | | | | | | | | | | The inline assembler is ugly and uses hard coded magic numbers. Make it more elegant to allow cleaner implementation of future GDT related patches. The compiler seems smart enough to generate the same code anyway -- Changes for v2: - Rebased against revised patch #3 - Use GDT size define instead of magic number - Added commit message
* x86: Remove GDR related magic numbersGraeme Russ2012-01-04-5/+6
| | | | | | | | -- Changes for v2: - Use an enum - Add defined for GDT size (previously added in patch 7) - Use X86_ namespace (as per Linux headers)
* x86: Add infrastructure to extract an e820 table from the coreboot tablesGabe Black2011-12-19-1/+37
| | | | | | | | 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>
* x86: Import code from coreboot's libpayload to parse the coreboot tableGabe Black2011-12-19-0/+279
| | | | | | | | | | | | | 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>
* x86: Initial commit for running as a coreboot payloadGabe Black2011-12-19-0/+148
| | | | | | | | 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>
* x86: Fix a few recently added bugsGabe Black2011-11-29-0/+1
| | | | | Signed-off-by: Gabe Black <gabeblack@chromium.org> Signed-off-by: Graeme Russ <graeme.russ@gmail.com>
* x86: Misc cleanupsGraeme Russ2011-11-29-2/+3
| | | | Signed-off-by: Graeme Russ <graeme.russ@gmail.com>
* x86: Misc PCI touchupsGraeme Russ2011-11-29-3/+1
| | | | Signed-off-by: Graeme Russ <graeme.russ@gmail.com>
* x86: Ensure IDT and GDT remain 16-byte aligned post relocationGraeme Russ2011-11-29-1/+1
| | | | | | Some CPUs have strict alignment requirements for these tables Signed-off-by: Graeme Russ <graeme.russ@gmail.com>
* x86: Add multiboot headerGraeme Russ2011-11-29-0/+20
| | | | | | | | | 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>
* sc520: Create arch asm-offsetsGraeme Russ2011-11-29-2/+49
| | | | Signed-off-by: Graeme Russ <graeme.russ@gmail.com>
* x86: Punt cold- and warm-boot flagsGraeme Russ2011-11-29-5/+0
| | | | | | | Nobody uses them anyway Signed-off-by: Graeme Russ <graeme.russ@gmail.com> Acked-by: Mike Frysinger <vapier@gentoo.org>
* cosmetic: checkpatch cleanup of arch/x86/cpu/sc520/*.cGraeme Russ2011-11-29-87/+39
| | | | Signed-off-by: Graeme Russ <graeme.russ@gmail.com>
* cosmetic: checkpatch cleanup of arch/x86/cpu/*.cGraeme Russ2011-11-29-23/+30
| | | | Signed-off-by: Graeme Russ <graeme.russ@gmail.com>
* x86: Call hang() on unrecoverable exceptionGraeme Russ2011-11-29-10/+10
| | | | Signed-off-by: Graeme Russ <graeme.russ@gmail.com>
* x86: Rename include/asm/ic to include/asm/arch-sc520Graeme Russ2011-11-02-9/+9
| | | Also include some trivial related cleanups
* x86: turn off cache: set control register properlyOndrej Kupka2011-11-02-1/+1
| | | | | | Bits should be ORed when they are supposed to be added together Signed-off-by: Ondrej Kupka <ondra.cap@gmail.com>
* Convert ISO-8859 files to UTF-8Albert ARIBAUD2011-08-04-15/+15
| | | | | | | | 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>
* cleanup: Fix typos and misspellings in various files.Mike Williams2011-07-28-1/+1
| | | | | | | | | | | Recieve/Receive recieve/receive Interupt/Interrupt interupt/interrupt Addres/Address addres/address Signed-off-by: Mike Williams <mike@mikebwilliams.com>
* Minor coding style cleanup.Wolfgang Denk2011-05-19-1/+0
| | | | Signed-off-by: Wolfgang Denk <wd@denx.de>
* sc520: Move reset to stand-alone fileGraeme Russ2011-04-13-10/+41
| | | | | | | | 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>
* x86: Rename i386 to x86Graeme Russ2011-04-13-0/+2374
Signed-off-by: Graeme Russ <graeme.russ@gmail.com>
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