Aaron Durbin (adurbin@google.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/4856
-gerrit
commit 658052e947863f176bfcf5e1841d361b18f4906a Author: Aaron Durbin adurbin@chromium.org Date: Fri Sep 27 11:38:36 2013 -0500
baytrail: start collecting timestamps
This commit always selects COLLECT_TIMESTAMPS and starts tracking TSC values from the early stages of bootblock. The initial timestamp value is saved in mm0 and mm1 while in bootlbock. This approach works because romcc is not configured to use mmx registers for its compilation.
Additionally, the romstage api with the mainboard was changed to always pass around a pointer to a romstage_params structure as the timestamps are saved in there until ram is up.
BUG=chrome-os-partner:22873 BRANCH=None TEST=Built and booted with added code to print out timestamps at and of ramstage. Everything looks legit.
Change-Id: Iba8d5fff1654afa6471088c46a357474ba533236 Signed-off-by: Aaron Durbin adurbin@chromium.org Reviewed-on: https://chromium-review.googlesource.com/170950 Reviewed-by: Shawn Nematbakhsh shawnn@chromium.org --- src/soc/intel/baytrail/Kconfig | 1 + src/soc/intel/baytrail/Makefile.inc | 1 + src/soc/intel/baytrail/baytrail/romstage.h | 16 ++++++-- src/soc/intel/baytrail/bootblock/Makefile.inc | 1 + src/soc/intel/baytrail/bootblock/timestamp.inc | 19 +++++++++ src/soc/intel/baytrail/romstage/cache_as_ram.inc | 6 +++ src/soc/intel/baytrail/romstage/romstage.c | 51 ++++++++++++++++++++++-- 7 files changed, 89 insertions(+), 6 deletions(-)
diff --git a/src/soc/intel/baytrail/Kconfig b/src/soc/intel/baytrail/Kconfig index 23d795a..5942587 100644 --- a/src/soc/intel/baytrail/Kconfig +++ b/src/soc/intel/baytrail/Kconfig @@ -25,6 +25,7 @@ config CPU_SPECIFIC_OPTIONS select CACHE_MRC_SETTINGS select CACHE_ROM select SPI_FLASH + select COLLECT_TIMESTAMPS
config BOOTBLOCK_CPU_INIT string diff --git a/src/soc/intel/baytrail/Makefile.inc b/src/soc/intel/baytrail/Makefile.inc index 7786660..7c9739d 100644 --- a/src/soc/intel/baytrail/Makefile.inc +++ b/src/soc/intel/baytrail/Makefile.inc @@ -1,3 +1,4 @@ +subdirs-y += bootblock subdirs-y += microcode subdirs-y += romstage subdirs-y += ../../../cpu/x86/lapic diff --git a/src/soc/intel/baytrail/baytrail/romstage.h b/src/soc/intel/baytrail/baytrail/romstage.h index 6c622e1..b797e8e 100644 --- a/src/soc/intel/baytrail/baytrail/romstage.h +++ b/src/soc/intel/baytrail/baytrail/romstage.h @@ -24,16 +24,26 @@ #error "Don't include romstage.h from a ramstage compilation unit!" #endif
+#include <stdint.h> #include <arch/cpu.h> #include <baytrail/mrc_wrapper.h>
+#define NUM_ROMSTAGE_TS 4 +struct romstage_timestamps { + uint64_t times[NUM_ROMSTAGE_TS]; + int count; +}; + struct romstage_params { + struct romstage_timestamps ts; + unsigned long bist; struct mrc_params *mrc_params; };
-void mainboard_romstage_entry(unsigned long bist); -void romstage_common(const struct romstage_params *params); -void * asmlinkage romstage_main(unsigned long bist); +void mainboard_romstage_entry(struct romstage_params *params); +void romstage_common(struct romstage_params *params); +void * asmlinkage romstage_main(unsigned long bist, uint32_t tsc_lo, + uint32_t tsc_high); void asmlinkage romstage_after_car(void); void raminit(struct mrc_params *mp, int prev_sleep_state); void gfx_init(void); diff --git a/src/soc/intel/baytrail/bootblock/Makefile.inc b/src/soc/intel/baytrail/bootblock/Makefile.inc new file mode 100644 index 0000000..3a40251 --- /dev/null +++ b/src/soc/intel/baytrail/bootblock/Makefile.inc @@ -0,0 +1 @@ +chipset_bootblock_inc += $(src)/soc/intel/baytrail/bootblock/timestamp.inc diff --git a/src/soc/intel/baytrail/bootblock/timestamp.inc b/src/soc/intel/baytrail/bootblock/timestamp.inc new file mode 100644 index 0000000..f565775 --- /dev/null +++ b/src/soc/intel/baytrail/bootblock/timestamp.inc @@ -0,0 +1,19 @@ +/* Store the initial timestamp for booting in mmx registers. This works + * because the bootblock isn't being compiled with MMX support so mm0 and + * mm1 will be preserved into romstage. */ + .code32 + +.global stash_timestamp +stash_timestamp: + + /* Save the BIST value */ + movl %eax, %ebp + + finit + rdtsc + movd %eax, %mm0 + movd %edx, %mm1 + + /* Restore the BIST value to %eax */ + movl %ebp, %eax + diff --git a/src/soc/intel/baytrail/romstage/cache_as_ram.inc b/src/soc/intel/baytrail/romstage/cache_as_ram.inc index 920fbe4..82c77e2 100644 --- a/src/soc/intel/baytrail/romstage/cache_as_ram.inc +++ b/src/soc/intel/baytrail/romstage/cache_as_ram.inc @@ -169,6 +169,12 @@ wait_for_sipi: movl $(CONFIG_DCACHE_RAM_BASE + CONFIG_DCACHE_RAM_SIZE), %eax movl %eax, %esp
+ /* Push the initial TSC value from boot block. The low 32 bits are + * in mm0, and the high 32 bits are in mm1. */ + movd %mm1, %eax + pushl %eax + movd %mm0, %eax + pushl %eax /* Restore the BIST result. */ movl %ebp, %eax movl %esp, %ebp diff --git a/src/soc/intel/baytrail/romstage/romstage.c b/src/soc/intel/baytrail/romstage/romstage.c index e4e6fde..8a65f06 100644 --- a/src/soc/intel/baytrail/romstage/romstage.c +++ b/src/soc/intel/baytrail/romstage/romstage.c @@ -26,6 +26,7 @@ #include <cbmem.h> #include <cpu/x86/mtrr.h> #include <romstage_handoff.h> +#include <timestamp.h> #include <baytrail/gpio.h> #include <baytrail/iomap.h> #include <baytrail/iosf.h> @@ -33,6 +34,20 @@ #include <baytrail/pci_devs.h> #include <baytrail/romstage.h>
+static inline uint64_t timestamp_get(void) +{ + return rdtscll(); +} + +static inline tsc_t ts64_to_tsc(uint64_t ts) +{ + tsc_t tsc = { + .lo = ts, + .hi = ts >> 32, + }; + return tsc; +} + /* The cache-as-ram assembly file calls romstage_main() after setting up * cache-as-ram. romstage_main() will then call the mainboards's * mainboard_romstage_entry() function. That function then calls @@ -69,17 +84,36 @@ static void program_base_addresses(void) pci_write_config32(lpc_dev, GBASE, reg); }
+static inline void mark_ts(struct romstage_params *rp, uint64_t ts) +{ + struct romstage_timestamps *rt = &rp->ts; + + rt->times[rt->count] = ts; + rt->count++; +} + /* Entry from cache-as-ram.inc. */ -void * asmlinkage romstage_main(unsigned long bist) +void * asmlinkage romstage_main(unsigned long bist, + uint32_t tsc_low, uint32_t tsc_hi) { + struct romstage_params rp = { + .bist = bist, + .mrc_params = NULL, + }; + + /* Save initial timestamp from bootblock. */ + mark_ts(&rp, (((uint64_t)tsc_hi) << 32) | (uint64_t)tsc_low); + /* Save romstage begin */ + mark_ts(&rp, timestamp_get()); + /* Call into mainboard. */ - mainboard_romstage_entry(bist); + mainboard_romstage_entry(&rp);
return setup_stack_and_mttrs(); }
/* Entry from the mainboard. */ -void romstage_common(const struct romstage_params *params) +void romstage_common(struct romstage_params *params) { struct romstage_handoff *handoff;
@@ -91,15 +125,24 @@ void romstage_common(const struct romstage_params *params)
gfx_init();
+ mark_ts(params, timestamp_get()); + /* Initialize RAM */ raminit(params->mrc_params, 5);
+ mark_ts(params, timestamp_get()); + handoff = romstage_handoff_find_or_add(); if (handoff != NULL) handoff->s3_resume = 0; else printk(BIOS_DEBUG, "Romstage handoff structure not added!\n");
+ /* Save timestamp information. */ + timestamp_init(ts64_to_tsc(params->ts.times[0])); + timestamp_add(TS_START_ROMSTAGE, ts64_to_tsc(params->ts.times[1])); + timestamp_add(TS_BEFORE_INITRAM, ts64_to_tsc(params->ts.times[2])); + timestamp_add(TS_AFTER_INITRAM, ts64_to_tsc(params->ts.times[3])); }
static void open_up_spi(void) @@ -117,6 +160,8 @@ void asmlinkage romstage_after_car(void) /* Allow BIOS to program SPI part. */ open_up_spi();
+ timestamp_add_now(TS_END_ROMSTAGE); + /* Load the ramstage. */ copy_and_run(); while (1);
-
Aaron Durbin