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* x86: Add multi-processor initSimon Glass2015-04-301-0/+3
| | | | | | | | | Most modern x86 CPUs include more than one CPU core. The OS normally requires that these 'Application Processors' (APs) be brought up by the boot loader. Add the required support to U-Boot to init additional APs. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
* x86: Implement reset_cpu() correctly for modern CPUsSimon Glass2015-04-291-0/+19
| | | | | | | | | | | | The existing code is pretty ancient and is unreliable on modern hardware. Generally it will hang. We can use port 0xcf9 to initiate reset on more modern hardware (say in the last 10 years). Update the reset_cpu() function to do this, and add a new 'full reset' function to perform a full power cycle. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
* x86: Add GDT descriptors for option ROMsSimon Glass2014-11-251-19/+12
| | | | | | | Option ROMs require a few additional descriptors. Add these, and remove the enum since we now have to access several descriptors from assembler. Signed-off-by: Simon Glass <sjg@chromium.org>
* x86: ivybridge: Perform initial CPU setupSimon Glass2014-11-211-0/+2
| | | | | | | Set up the flex ratio (controls speed versus heat output) and a few other very early things. Signed-off-by: Simon Glass <sjg@chromium.org>
* x86: Add processor functions to halt and get stack pointerSimon Glass2014-11-211-0/+19
| | | | | | | Add a function to get the stack pointer and another to halt the CPU. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
* Add GPL-2.0+ SPDX-License-Identifier to source filesWolfgang Denk2013-07-241-17/+1
| | | | | | Signed-off-by: Wolfgang Denk <wd@denx.de> [trini: Fixup common/cmd_io.c] Signed-off-by: Tom Rini <trini@ti.com>
* x86: Put global data on the stackGraeme Russ2012-11-281-0/+1
| | | | | | | | | | 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>
* x86: Use fs for global dataGraeme Russ2012-01-041-0/+1
| | | | | | | | | | | | | | | | | | | | | | 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: Remove GDR related magic numbersGraeme Russ2012-01-041-4/+19
| | | | | | | | -- Changes for v2: - Use an enum - Add defined for GDT size (previously added in patch 7) - Use X86_ namespace (as per Linux headers)
* Convert ISO-8859 files to UTF-8Albert ARIBAUD2011-08-041-1/+1
| | | | | | | | 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>
* x86: Rename i386 to x86Graeme Russ2011-04-131-0/+32
Signed-off-by: Graeme Russ <graeme.russ@gmail.com>
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