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2014-11-21x86: Tidy up global descriptor table setupSimon Glass
This code is a little muddled, so tidy it up. Make sure that we put the GDT in the right place and set it up properly. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
2014-10-23dm: x86: Support pre-reloc malloc()Simon Glass
Add support for this by reserving a block of memory below global_data. Signed-off-by: Simon Glass <sjg@chromium.org>
2014-10-23dm: x86: Zero global data before board_init_f()Simon Glass
To permit information to be passed from the early U-Boot code to board_init_f() we cannot zero the global_data in board_init_f(). Instead zero it in the start-up code. Signed-off-by: Simon Glass <sjg@chromium.org>
2013-07-24Add GPL-2.0+ SPDX-License-Identifier to source filesWolfgang Denk
Signed-off-by: Wolfgang Denk <wd@denx.de> [trini: Fixup common/cmd_io.c] Signed-off-by: Tom Rini <trini@ti.com>
2013-02-01x86: Set up the global data pointer in C instead of asmSimon Glass
We currently assume that the global data pointer is at the start of struct global_data. We want to remove this restriction, and it is easiest to do this in C. Remove the asm code and add equivalent code in C. This idea was proposed by Graeme Russ here: http://patchwork.ozlabs.org/patch/199741/ Signed-off-by: Simon Glass <sjg@chromium.org> [trini: Apply Graeme Russ' comments http://patchwork.ozlabs.org/patch/206305/ here, re-order] Signed-off-by: Tom Rini <trini@ti.com>
2012-12-06x86: Add back cold- and warm-boot flagsGabe Black
These were removed, but actually are useful. Cold means that we started from a reset/power on. Warm means that we started from another U-Boot. We determine whether u-boot on x86 was warm or cold booted (really if it started at the beginning of the text segment or at the ELF entry point). We plumb the result through to the global data structure. Signed-off-by: Simon Glass <sjg@chromium.org>
2012-11-28x86: Put global data on the stackGraeme Russ
Putting global data on the stack simplifies the init process (and makes it slightly quicker). During the 'flash' stage of the init sequence, global data is in the CAR stack. After SDRAM is initialised, global data is copied from CAR to the SDRAM stack Signed-off-by: Graeme Russ <graeme.russ@gmail.com> Signed-off-by: Simon Glass <sjg@chromium.org>
2012-01-04x86: Use fs for global dataGraeme Russ
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
2012-01-04x86: Simplify Flash-to-RAM code execution transitionGraeme Russ
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
2012-01-04x86: Remove GDR related magic numbersGraeme Russ
-- Changes for v2: - Use an enum - Add defined for GDT size (previously added in patch 7) - Use X86_ namespace (as per Linux headers)
2011-11-29x86: Misc cleanupsGraeme Russ
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>
2011-08-04Convert 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>
2011-07-28cleanup: 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>
2011-04-13x86: Rename i386 to x86Graeme Russ
Signed-off-by: Graeme Russ <graeme.russ@gmail.com>
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