[PATCH v4 1/2] trace: select TIMER_EARLY to avoid infinite recursion
When tracing functions is enabled this adds calls to __cyg_profile_func_enter() and __cyg_profile_func_exit() to the traced functions.
__cyg_profile_func_enter() and __cyg_profile_func_exit() invoke timer_get_us() to record the entry and exit time.
initr_dm() will make gd->dm_root = NULL and gd->timer = NULL, so timer_get_us() -> get_ticks() -> dm_timer_init() will lead to an indefinite recursion.
So select TIMER_EARLY when tracing got enabled.
Signed-off-by: Pragnesh Patel pragnesh.patel@sifive.com Reviewed-by: Simon Glass sjg@chromium.org Reviewed-by: Rick Chen rick@andestech.com ---
Changes in v4: - no change
Changes in v3: - no change
Changes in v2: - new patch
lib/Kconfig | 1 + 1 file changed, 1 insertion(+)
diff --git a/lib/Kconfig b/lib/Kconfig index a704568443..9b9177f2aa 100644 --- a/lib/Kconfig +++ b/lib/Kconfig @@ -210,6 +210,7 @@ config BITREVERSE config TRACE bool "Support for tracing of function calls and timing" imply CMD_TRACE + select TIMER_EARLY help Enables function tracing within U-Boot. This allows recording of call traces including timing information. The command can write data to
Added support for timer_early_get_count() and timer_early_get_rate() This is mostly useful in tracing.
Signed-off-by: Pragnesh Patel pragnesh.patel@sifive.com Reviewed-by: Rick Chen rick@andestech.com ---
Changes in v4: - Rebase on master
Changes in v3: - Add IS_ENABLED(CONFIG_TIMER_EARLY) for timer_early_get_rate() and timer_early_get_count() functions.
Changes in v2: - make u-boot compile for qemu (include/configs/qemu-riscv.h)
drivers/timer/andes_plmt_timer.c | 21 ++++++++++++++++++++- drivers/timer/riscv_timer.c | 21 ++++++++++++++++++++- drivers/timer/sifive_clint_timer.c | 21 ++++++++++++++++++++- include/configs/ax25-ae350.h | 5 +++++ include/configs/qemu-riscv.h | 5 +++++ include/configs/sifive-fu540.h | 5 +++++ 6 files changed, 75 insertions(+), 3 deletions(-)
diff --git a/drivers/timer/andes_plmt_timer.c b/drivers/timer/andes_plmt_timer.c index db2cf86f63..a3797b22c7 100644 --- a/drivers/timer/andes_plmt_timer.c +++ b/drivers/timer/andes_plmt_timer.c @@ -18,11 +18,30 @@ /* mtime register */ #define MTIME_REG(base) ((ulong)(base))
-static u64 andes_plmt_get_count(struct udevice *dev) +static u64 notrace andes_plmt_get_count(struct udevice *dev) { return readq((void __iomem *)MTIME_REG(dev_get_priv(dev))); }
+#if CONFIG_IS_ENABLED(RISCV_MMODE) && IS_ENABLED(CONFIG_TIMER_EARLY) +/** + * timer_early_get_rate() - Get the timer rate before driver model + */ +unsigned long notrace timer_early_get_rate(void) +{ + return RISCV_MMODE_TIMER_FREQ; +} + +/** + * timer_early_get_count() - Get the timer count before driver model + * + */ +u64 notrace timer_early_get_count(void) +{ + return readq((void __iomem *)MTIME_REG(RISCV_MMODE_TIMERBASE)); +} +#endif + static const struct timer_ops andes_plmt_ops = { .get_count = andes_plmt_get_count, }; diff --git a/drivers/timer/riscv_timer.c b/drivers/timer/riscv_timer.c index 21ae184057..3627ed79b8 100644 --- a/drivers/timer/riscv_timer.c +++ b/drivers/timer/riscv_timer.c @@ -16,7 +16,7 @@ #include <timer.h> #include <asm/csr.h>
-static u64 riscv_timer_get_count(struct udevice *dev) +static u64 notrace riscv_timer_get_count(struct udevice *dev) { __maybe_unused u32 hi, lo;
@@ -31,6 +31,25 @@ static u64 riscv_timer_get_count(struct udevice *dev) return ((u64)hi << 32) | lo; }
+#if CONFIG_IS_ENABLED(RISCV_SMODE) && IS_ENABLED(CONFIG_TIMER_EARLY) +/** + * timer_early_get_rate() - Get the timer rate before driver model + */ +unsigned long notrace timer_early_get_rate(void) +{ + return RISCV_SMODE_TIMER_FREQ; +} + +/** + * timer_early_get_count() - Get the timer count before driver model + * + */ +u64 notrace timer_early_get_count(void) +{ + return riscv_timer_get_count(NULL); +} +#endif + static int riscv_timer_probe(struct udevice *dev) { struct timer_dev_priv *uc_priv = dev_get_uclass_priv(dev); diff --git a/drivers/timer/sifive_clint_timer.c b/drivers/timer/sifive_clint_timer.c index de23b85404..de7b4b95c9 100644 --- a/drivers/timer/sifive_clint_timer.c +++ b/drivers/timer/sifive_clint_timer.c @@ -15,11 +15,30 @@ /* mtime register */ #define MTIME_REG(base) ((ulong)(base) + 0xbff8)
-static u64 sifive_clint_get_count(struct udevice *dev) +static u64 notrace sifive_clint_get_count(struct udevice *dev) { return readq((void __iomem *)MTIME_REG(dev_get_priv(dev))); }
+#if CONFIG_IS_ENABLED(RISCV_MMODE) && IS_ENABLED(CONFIG_TIMER_EARLY) +/** + * timer_early_get_rate() - Get the timer rate before driver model + */ +unsigned long notrace timer_early_get_rate(void) +{ + return RISCV_MMODE_TIMER_FREQ; +} + +/** + * timer_early_get_count() - Get the timer count before driver model + * + */ +u64 notrace timer_early_get_count(void) +{ + return readq((void __iomem *)MTIME_REG(RISCV_MMODE_TIMERBASE)); +} +#endif + static const struct timer_ops sifive_clint_ops = { .get_count = sifive_clint_get_count, }; diff --git a/include/configs/ax25-ae350.h b/include/configs/ax25-ae350.h index b2606e794d..bd9c371f83 100644 --- a/include/configs/ax25-ae350.h +++ b/include/configs/ax25-ae350.h @@ -17,6 +17,11 @@ #endif #endif
+#define RISCV_MMODE_TIMERBASE 0xe6000000 +#define RISCV_MMODE_TIMER_FREQ 60000000 + +#define RISCV_SMODE_TIMER_FREQ 60000000 + /* * CPU and Board Configuration Options */ diff --git a/include/configs/qemu-riscv.h b/include/configs/qemu-riscv.h index a2f33587c2..5291de83f8 100644 --- a/include/configs/qemu-riscv.h +++ b/include/configs/qemu-riscv.h @@ -29,6 +29,11 @@
#define CONFIG_STANDALONE_LOAD_ADDR 0x80200000
+#define RISCV_MMODE_TIMERBASE 0x2000000 +#define RISCV_MMODE_TIMER_FREQ 1000000 + +#define RISCV_SMODE_TIMER_FREQ 1000000 + /* Environment options */
#ifndef CONFIG_SPL_BUILD diff --git a/include/configs/sifive-fu540.h b/include/configs/sifive-fu540.h index c1c79db147..0d69d1c548 100644 --- a/include/configs/sifive-fu540.h +++ b/include/configs/sifive-fu540.h @@ -36,6 +36,11 @@
#define CONFIG_STANDALONE_LOAD_ADDR 0x80200000
+#define RISCV_MMODE_TIMERBASE 0x2000000 +#define RISCV_MMODE_TIMER_FREQ 1000000 + +#define RISCV_SMODE_TIMER_FREQ 1000000 + /* Environment options */
#ifndef CONFIG_SPL_BUILD
participants (1)
-
Pragnesh Patel