Commit graph

80 commits

Author SHA1 Message Date
Bin Meng
4949166906 x86: Save mtrr support flag in global data
CPUID (EAX 01H) returns MTRR support flag in EDX bit 12. Probe this
flag in x86_cpu_init_f() and save it in global data.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Acked-by: Simon Glass <sjg@chromium.org>
2015-01-23 17:24:55 -07:00
Simon Glass
e34aef1de3 x86: Add GDT descriptors for option ROMs
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>
2014-11-25 06:34:14 -07:00
Bin Meng
a549f7497b x86: Remove cpu_init_r() for x86
Since cpu_init_interrupts() was moved out of cpu_init_r(), it is
useless to keep cpu_init_r() for x86, thus remove it.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Acked-by: Simon Glass <sjg@chromium.org>
Tested-by: Simon Glass <sjg@chromium.org>
2014-11-25 06:34:02 -07:00
Bin Meng
4372a9eca5 x86: Call cpu_init_interrupts() from interrupt_init()
Currently cpu_init_interrupts() is called from cpu_init_r() to
setup the interrupt and exception of the cpu core, but at that
time the i8259 has not been initialized to mask all the irqs
and remap the master i8259 interrupt vector base, so the whole
system is at risk of being interrupted, and if interrupted,
wrong interrupt/exception message is shown.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Acked-by: Simon Glass <sjg@chromium.org>
Tested-by: Simon Glass <sjg@chromium.org>
2014-11-25 06:34:02 -07:00
Simon Glass
a49e3c7f09 x86: Make show_boot_progress() common
This function can probably be used on all x86 boards, so move it into the
common file.

Signed-off-by: Simon Glass <sjg@chromium.org>
2014-11-21 07:34:15 +01:00
Simon Glass
727c1a9871 x86: Replace fill_processor_name() with cpu_get_name()
This implementation has a 'cpu' prefix and returns a pointer to the string,
avoiding the need for copying.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
2014-11-21 07:24:12 +01:00
Simon Glass
6cba6b9209 x86: Fix a warning with gcc 4.4.4
This warning appears even though it seems that the compiler could work it
out. Fix it.

Signed-off-by: Simon Glass <sjg@chromium.org>
2014-11-21 07:24:10 +01:00
Bin Meng
52f952bf5e x86: Do CPU identification in the early phase
The CPU identification happens in x86_cpu_init_f() and corresponding
fields are saved in the global data for later use.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
2014-11-21 07:24:10 +01:00
Simon Glass
e1ffd81797 x86: Fix up some missing prototypes
Some functions are missing prototypes. Fix those that are specific to x86.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
2014-11-21 07:24:09 +01:00
Simon Glass
8b37c7694f x86: Use the standard arch_cpu_init() function
Instead of an x86-specific cpu_init_f() function, use the normal U-Boot one
for this purpose. Also remove a useless/misleading comment.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
2014-11-21 07:24:09 +01:00
Simon Glass
200182a748 x86: Add support for starting 64-bit kernel
Add code to jump to a 64-bit Linux kernel. We need to set up a flat page
table structure, a new GDT and then go through a few hoops in the right
order.

Signed-off-by: Simon Glass <sjg@chromium.org>
2014-10-28 20:43:47 -06:00
Simon Glass
92cc94a1fe x86: Display basic CPU information on boot
Display the type of CPU (x86 or x86_64) when starting up.

Signed-off-by: Simon Glass <sjg@chromium.org>
2014-10-28 20:42:56 -06:00
Simon Glass
7bddac947d x86: Move paging functions into cpu.c
These functions really don't belong in physmem as they relate to the
cpu. Move them.

Signed-off-by: Simon Glass <sjg@chromium.org>
2014-10-28 20:42:51 -06:00
Wolfgang Denk
1a4596601f Add GPL-2.0+ SPDX-License-Identifier to source files
Signed-off-by: Wolfgang Denk <wd@denx.de>
[trini: Fixup common/cmd_io.c]
Signed-off-by: Tom Rini <trini@ti.com>
2013-07-24 09:44:38 -04:00
Simon Glass
7949703a95 x86: Rationalise kernel booting logic and bootstage
The 'Starting linux' message appears twice in the code, but both call
through the same place. Unify these and add calls to bootstage to
mark the occasion.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Michael Spang <spang@chromium.org>
Acked-by: Graeme Russ <graeme.russ@gmail.com>
2013-05-13 13:33:20 -07:00
Simon Glass
8937140957 x86: Add basic cache operations
At present most x86 cache operations are undefined. Add a basic
implementation for these.

Signed-off-by: Simon Glass <sjg@chromium.org>
2013-03-04 15:57:34 -08:00
Simon Glass
5a35e6c48e x86: Move gd_addr into arch_global_data
Move this field into arch_global_data and tidy up.

Signed-off-by: Simon Glass <sjg@chromium.org>
[trini: Add arch/x86/cpu/cpu.c changes after Graeme's comments]
Signed-off-by: Tom Rini <trini@ti.com>
2013-02-01 15:39:42 -05:00
Simon Glass
0cecc3b679 x86: Set up the global data pointer in C instead of asm
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>
2013-02-01 15:36:53 -05:00
Stefan Reinauer
095593c030 x86: Add basic cache operations
Add functions to enable/disable the data cache.

Signed-off-by: Stefan Reinauer <reinauer@chromium.org>
Signed-off-by: Simon Glass <sjg@chromium.org>
2012-12-06 14:30:39 -08:00
Gabe Black
f30fc4de41 x86: Add a default implementation for cleanup_before_linux()
This function provides an opportunity for some last minute cleanup and
reconfiguration before control is handed over to Linux. It's possible this
may need to do something in the future, but for now it's left empty. It's set
up as a weak symbol so it can be overridden if necessary on a case by case
basis.

Signed-off-by: Gabe Black <gabeblack@chromium.org>
Signed-off-by: Simon Glass <sjg@chromium.org>
2012-11-30 13:44:04 -08:00
Graeme Russ
8d61625d6a x86: Put global data on the stack
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>
2012-11-28 11:40:03 -08:00
Graeme Russ
e4fb611649 x86: Forward declare gd_t
So it can be used as a type in struct global_data and remove an ugly typecast

Signed-off-by: Graeme Russ <graeme.russ@gmail.com>
Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Marek Vasut <marex@denx.de>
2012-11-28 11:40:03 -08:00
Graeme Russ
d653244b12 x86: Create weak init_cache() and default enable_caches() functions
--
Changes for v2:
 - Tweaked commit title
2012-01-04 22:19:01 +11:00
Graeme Russ
9e6c572ff0 x86: Use fs for global data
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
2012-01-04 22:17:24 +11:00
Graeme Russ
74bfbe1ba5 x86: Rework Global Descriptor Table loading
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
2012-01-04 22:17:19 +11:00
Graeme Russ
109ad143f8 x86: Remove GDR related magic numbers
--
Changes for v2:
 - Use an enum
 - Add defined for GDT size (previously added in patch 7)
 - Use X86_ namespace (as per Linux headers)
2012-01-04 21:05:09 +11:00
Gabe Black
60a9b6bfdd x86: Fix a few recently added bugs
Signed-off-by: Gabe Black <gabeblack@chromium.org>
Signed-off-by: Graeme Russ <graeme.russ@gmail.com>
2011-11-29 21:30:51 +11:00
Graeme Russ
717979fdd7 cosmetic: checkpatch cleanup of arch/x86/cpu/*.c
Signed-off-by: Graeme Russ <graeme.russ@gmail.com>
2011-11-29 21:01:21 +11:00
Albert ARIBAUD
fa82f871c8 Convert ISO-8859 files to UTF-8
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>
2011-08-04 23:34:02 +02:00
Graeme Russ
fea2572001 x86: Rename i386 to x86
Signed-off-by: Graeme Russ <graeme.russ@gmail.com>
2011-04-13 19:43:28 +10:00
Renamed from arch/i386/cpu/cpu.c (Browse further)