[U-Boot] [RFC PATCH] POST: add test before execution of post_run to avoid unneeded run
Some boards have the environment variables defined in a slow EEPROM. post_run accesses these environment variables to define which tests have to be run (in post_get_flags). This is very slow before the code relocation on some boards with a slow I2C EEPROM for environement variables.
This patch adds a check at the beginning of post_run to avoid to run post_get_flags (which may be slow on some boards for the above reason) for some given POST flags if no tests are defined with these flags (for instance, no need to run POST tests with POST_ROM if no tests for POST_ROM are defined).
Signed-off-by: Valentin Longchamp valentin.longchamp@keymile.com cc: Holger Brunck holger.brunck@keymile.com cc: Wolfgang Denk wd@denx.de --- post/post.c | 15 +++++++++++++++ 1 files changed, 15 insertions(+), 0 deletions(-)
diff --git a/post/post.c b/post/post.c index 1b7f2aa..d97f330 100644 --- a/post/post.c +++ b/post/post.c @@ -169,6 +169,18 @@ static void post_bootmode_test_off (void) post_word_store (word); }
+static int post_test_defined(int flags) +{ + int i; + int run_flags = flags & ~(POST_RAM | POST_ROM); + + for (i = 0; i < post_list_size; i++) + if (post_list[i].flags & run_flags) + return 1; + + return 0; +} + static void post_get_flags (int *test_flags) { int flag[] = { POST_POWERON, POST_NORMAL, POST_SLOWTEST, @@ -301,6 +313,9 @@ int post_run (char *name, int flags) unsigned int i; int test_flags[POST_MAX_NUMBER];
+ if (!post_test_defined(flags)) + return 0; + post_get_flags (test_flags);
if (name == NULL) {
Dear Valentin Longchamp,
In message 1311602833-29320-1-git-send-email-valentin.longchamp@keymile.com you wrote:
Some boards have the environment variables defined in a slow EEPROM. post_run accesses these environment variables to define which tests have to be run (in post_get_flags). This is very slow before the code relocation on some boards with a slow I2C EEPROM for environement variables.
This patch adds a check at the beginning of post_run to avoid to run post_get_flags (which may be slow on some boards for the above reason) for some given POST flags if no tests are defined with these flags (for instance, no need to run POST tests with POST_ROM if no tests for POST_ROM are defined).
I think I understand what you are tying to do, but I'm sorry, I cannot understand your code.
diff --git a/post/post.c b/post/post.c index 1b7f2aa..d97f330 100644 --- a/post/post.c +++ b/post/post.c @@ -169,6 +169,18 @@ static void post_bootmode_test_off (void) post_word_store (word); }
+static int post_test_defined(int flags) +{
- int i;
- int run_flags = flags & ~(POST_RAM | POST_ROM);
Why are you masking out the POST_RAM and POST_ROM bits here?
Assuming your intention is to shortcut post_run(), then this should be done always, independent of the mode.
- for (i = 0; i < post_list_size; i++)
if (post_list[i].flags & run_flags)return 1;
Please try if omitting run_flags and testing
if (post_list[i].flags & flags)
instead still has the intended effect. If so, then please resubmit a cleaned up patch.
If not, then please explain in detail how your patch is supposed to work.
Thanks.
Best regards,
Wolfgang Denk
On 07/26/2011 05:44 PM, Wolfgang Denk wrote:
Please try if omitting run_flags and testing
if (post_list[i].flags & flags)instead still has the intended effect. If so, then please resubmit a cleaned up patch.
If not, then please explain in detail how your patch is supposed to work.
I agree with you and will test this version and if it works resubmit the patch.
participants (2)
-
Valentin Longchamp -
Wolfgang Denk