u-boot.git/arch/x86/cpu/start.S, branch master Unnamed repository; edit this file 'description' to name the repository. x86: Tidy up the GDT size in start/16.S 2025-04-03T17:41:55+00:00 Simon Glass sjg@chromium.org 2025-03-15T14:25:36+00:00 3c7ab12249a986267f0eb60dffaa85c1f254148e Use a symbol to select the size of the GDT, rather than hard-coding a value. This matches how it is done in start64 Signed-off-by: Simon Glass <sjg@chromium.org> 
Use a symbol to select the size of the GDT, rather than hard-coding a
value. This matches how it is done in start64

Signed-off-by: Simon Glass <sjg@chromium.org>
Rename CONFIG_SYS_TEXT_BASE to CONFIG_TEXT_BASE 2022-10-31T15:01:31+00:00 Simon Glass sjg@chromium.org 2022-10-21T00:22:39+00:00 984639039f4cfe32ec2cc531d6ace05326ac49eb The current name is inconsistent with SPL which uses CONFIG_SPL_TEXT_BASE and this makes it imposible to use CONFIG_VAL(). Rename it to resolve this problem. Signed-off-by: Simon Glass <sjg@chromium.org> 
The current name is inconsistent with SPL which uses CONFIG_SPL_TEXT_BASE
and this makes it imposible to use CONFIG_VAL().

Rename it to resolve this problem.

Signed-off-by: Simon Glass <sjg@chromium.org>
common: Drop asm/global_data.h from common header 2021-02-02T20:33:42+00:00 Simon Glass sjg@chromium.org 2020-10-31T03:38:53+00:00 401d1c4f5d2d29c4bc4beaec95402ca23eb63295 Move this out of the common header and include it only where needed. In a number of cases this requires adding "struct udevice;" to avoid adding another large header or in other cases replacing / adding missing header files that had been pulled in, very indirectly. Finally, we have a few cases where we did not need to include <asm/global_data.h> at all, so remove that include. Signed-off-by: Simon Glass <sjg@chromium.org> Signed-off-by: Tom Rini <trini@konsulko.com> 
Move this out of the common header and include it only where needed.  In
a number of cases this requires adding "struct udevice;" to avoid adding
another large header or in other cases replacing / adding missing header
files that had been pulled in, very indirectly.   Finally, we have a few
cases where we did not need to include <asm/global_data.h> at all, so
remove that include.

Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Tom Rini <trini@konsulko.com>
x86: typo segement 2021-01-30T21:25:41+00:00 Heinrich Schuchardt xypron.glpk@gmx.de 2020-12-22T06:53:03+00:00 a0df924928906b9da095dcbfa63dd5503e3ac3df %s/segement/segment/ Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Reviewed-by: Bin Meng <bmeng.cn@gmail.com> 
%s/segement/segment/

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
x86: Introduce USE_EARLY_BOARD_INIT option 2020-09-01T05:38:31+00:00 Andy Shevchenko andriy.shevchenko@linux.intel.com 2020-08-20T10:02:20+00:00 1d01d0c2f0962e26a3661a2a7d497afa3fc1ed34 Introduce USE_EARLY_BOARD_INIT option and select it by the actual users. Cc: George McCollister <george.mccollister@gmail.com> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Reviewed-by: Stefan Roese <sr@denx.de> Reviewed-by: Aiden Park <aiden.park@intel.com> Reviewed-by: Bin Meng <bmeng.cn@gmail.com> 
Introduce USE_EARLY_BOARD_INIT option and select it by the actual users.

Cc: George McCollister <george.mccollister@gmail.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Stefan Roese <sr@denx.de>
Reviewed-by: Aiden Park <aiden.park@intel.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
x86: Update the comment about booting for FSP2 2020-07-17T06:32:24+00:00 Simon Glass sjg@chromium.org 2020-07-17T03:22:35+00:00 538c9b3d29d3777ff168b2341eacb5554791fc4e The comment here applies only to FSP1, so update it. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Wolfgang Wallner <wolfgang.wallner@br-automation.com> 
The comment here applies only to FSP1, so update it.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Wolfgang Wallner <wolfgang.wallner@br-automation.com>
Revert "x86: use invd instead of wbinvd in real mode start code" 2020-03-05T10:19:40+00:00 Andy Shevchenko andriy.shevchenko@linux.intel.com 2020-02-17T15:30:12+00:00 fa97ca161beb13a46a304f3c9824cdf0826dda0e This reverts commit 0d67fac29f3187e67f4fd3ef15f73e91be2fad12. As real hardware testing (*) shows the above mentioned commit breaks U-Boot on it. Revert for the upcoming release. We may get more information in the future and optimize the code accordingly. (*) on Intel Edison board. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Bin Meng <bmeng.cn@gmail.com> [bmeng: fix a typo in the commit message] Signed-off-by: Bin Meng <bmeng.cn@gmail.com> 
This reverts commit 0d67fac29f3187e67f4fd3ef15f73e91be2fad12.

As real hardware testing (*) shows the above mentioned commit
breaks U-Boot on it. Revert for the upcoming release. We may get
more information in the future and optimize the code accordingly.

(*) on Intel Edison board.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Bin Meng <bmeng.cn@gmail.com>
[bmeng: fix a typo in the commit message]
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
x86: use invd instead of wbinvd in real mode start code 2020-02-03T17:19:26+00:00 Masahiro Yamada masahiroy@kernel.org 2020-01-08T11:08:44+00:00 0d67fac29f3187e67f4fd3ef15f73e91be2fad12 I do not know why the boot code immediately after the system reset should write-back the cache content. I think the cache invalidation should be enough. I tested this commit with qemu-x86_defconfig, and it worked for me. Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Reviewed-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com> Tested-by: Bin Meng <bmeng.cn@gmail.com> 
I do not know why the boot code immediately after the system reset
should write-back the cache content. I think the cache invalidation
should be enough.

I tested this commit with qemu-x86_defconfig, and it worked for me.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Tested-by: Bin Meng <bmeng.cn@gmail.com>
x86: Add more comments to the start-up code 2019-10-08T05:57:36+00:00 Simon Glass sjg@chromium.org 2019-09-25T14:11:44+00:00 08deb6d36f0a830181a3acce5eaece9431a828c0 The full start-up sequence (TPL->SPL->U-Boot) can be a bit confusing since each phase has its own 'start' file. Add comments to explain this. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com> 
The full start-up sequence (TPL->SPL->U-Boot) can be a bit confusing since
each phase has its own 'start' file. Add comments to explain this.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
x86: Change condition for using CAR 2019-10-08T05:57:36+00:00 Simon Glass sjg@chromium.org 2019-09-25T14:11:43+00:00 6172e94c3c4729347624626d71e4eaf96ff9dcb9 At present we assume that CAR (Cache-as-RAM) is used if HOBs (Hand-off blocks) are not, since HOBs typically indicate that an FSP is in use, and FSPs handle the CAR init. However this is a bit indirect, and for FSP2 machines which use their own CAR implementation (such as apollolake) but use the FSP for other functions, the logic is wrong. To fix this, add a dedicated Kconfig option to indicate when CAR is used. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com> [bmeng: fix a typo in the commit message] Signed-off-by: Bin Meng <bmeng.cn@gmail.com> 
At present we assume that CAR (Cache-as-RAM) is used if HOBs (Hand-off
blocks) are not, since HOBs typically indicate that an FSP is in use, and
FSPs handle the CAR init.

However this is a bit indirect, and for FSP2 machines which use their own
CAR implementation (such as apollolake) but use the FSP for other
functions, the logic is wrong.

To fix this, add a dedicated Kconfig option to indicate when CAR is used.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
[bmeng: fix a typo in the commit message]
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>