Commit graph

21 commits

Author SHA1 Message Date
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
d8819f94d5 x86: Support tracing function
Some changes are needed to x86 timer functions to support tracing. Add
these so that the feature works correctly.

Signed-off-by: Simon Glass <sjg@chromium.org>
2013-06-26 10:18:56 -04:00
Simon Glass
f697d528ca x86: Support relocation of FDT on start-up
With CONFIG_OF_CONTROL we may have an FDT in the BSS region. Relocate
it up with the rest of U-Boot to keep the rest of memory free.

Signed-off-by: Simon Glass <sjg@chromium.org>
2013-03-04 15:57:47 -08:00
Simon Glass
bc2df1afb9 x86: Permit bootstage and timer data to be used prior to relocation
It is useful to be able to access the timer before U-Boot has relocated
so that we can fully support bootstage.

Add new global_data members to support this.

Signed-off-by: Simon Glass <sjg@chromium.org>
2013-03-04 15:57:36 -08:00
Simon Glass
43cff66e03 x86: Use generic global_data
Move x86 over to use generic global_data.

Signed-off-by: Simon Glass <sjg@chromium.org>
2013-02-04 09:05:46 -05:00
Simon Glass
6cb49c13f6 x86: Remove reset_status, relocoff from global_data
These fields are not used on x86, so punt them.

Signed-off-by: Simon Glass <sjg@chromium.org>
2013-02-01 15:40:31 -05:00
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
df4aa625a2 x86: Remove gdt_addr from arch_global_data
Remove this unused field.

Signed-off-by: Simon Glass <sjg@chromium.org>
2013-02-01 15:35:15 -05:00
Simon Glass
5cb48582ac Add architecture-specific global data
We plan to move architecture-specific data into a separate structure so
that we can make the rest of it common.

As a first step, create struct arch_global_data to hold these fields.
Initially it is empty.

This patch applies to all archs at once. I can split it if this is really
a pain.

Signed-off-by: Simon Glass <sjg@chromium.org>
2013-02-01 15:07:49 -05:00
Gabe Black
91d82a29e7 x86: Add back cold- and warm-boot flags
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>
2012-12-06 14:30:42 -08:00
Gabe Black
028a56289a x86: Add an fdt pointer to the global data structure
This change adds a pointer to the global data structure in x86 to point to
the device tree. This mirrors an identical pointer in ARM.

Signed-off-by: Gabe Black <gabeblack@chromium.org>
Signed-off-by: Simon Glass <sjg@chromium.org>
2012-11-30 13:44:04 -08:00
Gabe Black
c953fbee54 x86: Add some missing includes
I suspect these includes were usually available because something else
included them earlier or because they were brought in transitively.

Change-Id: I6aae2ac94dc792eac6febb4345e8125f69f70988
Signed-off-by: Gabe Black <gabeblack@chromium.org>
Signed-off-by: Simon Glass <sjg@chromium.org>
2012-11-28 11:40:04 -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
Simon Glass
55f97c1bfb x86: Change global data baudrate to int
This doesn't need to be a long, so change it.

Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Tom Rini <trini@ti.com>
2012-10-19 15:25:46 -07:00
Mike Frysinger
47fde91f0c global_data: unify global flag defines
All the global flag defines are the same across all arches.  So unify them
in one place, and add a simple way for arches to extend for their needs.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2012-08-09 21:46:32 +02:00
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
311b1a2b38 sc520: Create arch asm-offsets
Signed-off-by: Graeme Russ <graeme.russ@gmail.com>
2011-11-29 21:07:42 +11:00
Graeme Russ
facc9e7bf4 x86: Punt cold- and warm-boot flags
Nobody uses them anyway

Signed-off-by: Graeme Russ <graeme.russ@gmail.com>
Acked-by: Mike Frysinger <vapier@gentoo.org>
2011-11-29 21:04:06 +11:00
Graeme Russ
9558b48af0 console: Implement pre-console buffer
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.
2011-10-05 22:03:09 +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/include/asm/global_data.h (Browse further)