On Tue, 20 Nov 2012, Otavio Salvador wrote:
On Tue, Nov 20, 2012 at 12:33 PM, Lee Jones lee.jones@linaro.org wrote:
This patch adds support for passing boot time information to the Linus kernel using ATAGS when booting on ARM based devices.
Linus or Linux?
Linux.
I'll fix-up when the review process has finished.
Thanks.
Based heavily on the original driver by Jonas Aaberg.
Signed-off-by: Lee Jones lee.jones@linaro.org
arch/arm/include/asm/setup.h | 18 +++++++++++++++++ arch/arm/lib/bootm.c | 45 ++++++++++++++++++++++++++++++++++++++++-- 2 files changed, 61 insertions(+), 2 deletions(-)
diff --git a/arch/arm/include/asm/setup.h b/arch/arm/include/asm/setup.h index 78a7fac..6088440 100644 --- a/arch/arm/include/asm/setup.h +++ b/arch/arm/include/asm/setup.h @@ -205,6 +205,19 @@ struct tag_memclk { u32 fmemclk; };
+/* for automatic boot timing testcases */ +#define ATAG_BOOTTIME 0x41000403 +#define BOOTTIME_MAX 10
+#include <boottime.h>
+struct tag_boottime {
struct boottime_entry entry[BOOTTIME_MAX];u32 idle; /* in us */u32 total; /* in us */u8 num;+};
struct tag { struct tag_header hdr; union { @@ -227,6 +240,11 @@ struct tag { * DC21285 specific */ struct tag_memclk memclk;
/** Boot time*/struct tag_boottime boottime; } u;};
diff --git a/arch/arm/lib/bootm.c b/arch/arm/lib/bootm.c index 1bd2730..03774c8 100644 --- a/arch/arm/lib/bootm.c +++ b/arch/arm/lib/bootm.c @@ -28,6 +28,7 @@ #include <common.h> #include <command.h> #include <image.h> +#include <boottime.h> #include <u-boot/zlib.h> #include <asm/byteorder.h> #include <fdt.h> @@ -114,7 +115,8 @@ static void announce_and_cleanup(void) defined(CONFIG_CMDLINE_TAG) || \ defined(CONFIG_INITRD_TAG) || \ defined(CONFIG_SERIAL_TAG) || \
defined(CONFIG_REVISION_TAG)
defined(CONFIG_REVISION_TAG) || \defined(CONFIG_BOOTTIME)static void setup_start_tag (bd_t *bd) { params = (struct tag *)bd->bi_boot_params; @@ -130,6 +132,37 @@ static void setup_start_tag (bd_t *bd) } #endif
+#ifdef CONFIG_BOOTTIME +static void setup_boottime_tags(void) +{
unsigned int i;struct boottime_entry *b;params->hdr.tag = ATAG_BOOTTIME;params->hdr.size = tag_size(tag_boottime);params->u.boottime.idle = boottime_idle_get();params->u.boottime.total = boottime_idle_done();for (i = 0; i < BOOTTIME_MAX; i++) {b = boottime_get_entry(i);if (b == NULL)break;params->u.boottime.entry[i].time = b->time;strncpy((char *)params->u.boottime.entry[i].name,(char *)b->name, BOOTTIME_MAX_NAME_LEN);params->u.boottime.entry[i].name[BOOTTIME_MAX_NAME_LEN -1] = '\0';
}params->u.boottime.num = i;params = tag_next(params);+} +#endif
#ifdef CONFIG_SETUP_MEMORY_TAGS static void setup_memory_tags(bd_t *bd) { @@ -233,6 +266,10 @@ static void setup_end_tag(bd_t *bd) } #endif
+#ifdef CONFIG_BOOTTIME +static void setup_boottime_tags(void); +#endif
#ifdef CONFIG_OF_LIBFDT static int create_fdt(bootm_headers_t *images) { @@ -293,9 +330,13 @@ static void boot_prep_linux(bootm_headers_t *images) defined(CONFIG_CMDLINE_TAG) || \ defined(CONFIG_INITRD_TAG) || \ defined(CONFIG_SERIAL_TAG) || \
defined(CONFIG_REVISION_TAG)
defined(CONFIG_REVISION_TAG) || \defined (CONFIG_BOOTTIME) debug("using: ATAGS\n"); setup_start_tag(gd->bd);+#ifdef CONFIG_BOOTTIME
setup_boottime_tags();+#endif #ifdef CONFIG_SERIAL_TAG setup_serial_tag(¶ms);
#endif
1.7.9.5
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-- Otavio Salvador O.S. Systems E-mail: otavio@ossystems.com.br http://www.ossystems.com.br Mobile: +55 53 9981-7854 http://projetos.ossystems.com.br