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authorAaron Durbin <adurbin@chromium.org>2013-09-27 11:38:36 -0500
committerAaron Durbin <adurbin@google.com>2014-02-05 05:23:08 +0100
commit794bddf97c1c07f5fd12f073f4f5da3f476a1f07 (patch)
tree6a88c9979276c51f732141d23b63578b3188b4e9 /src
parent818f369da2b0c0df553fd41aad966869653a1d91 (diff)
downloadcoreboot-794bddf97c1c07f5fd12f073f4f5da3f476a1f07.tar.xz
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 end 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> Reviewed-on: http://review.coreboot.org/4856 Tested-by: build bot (Jenkins) Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Diffstat (limited to 'src')
-rw-r--r--src/soc/intel/baytrail/Kconfig1
-rw-r--r--src/soc/intel/baytrail/Makefile.inc1
-rw-r--r--src/soc/intel/baytrail/baytrail/romstage.h16
-rw-r--r--src/soc/intel/baytrail/bootblock/Makefile.inc1
-rw-r--r--src/soc/intel/baytrail/bootblock/timestamp.inc18
-rw-r--r--src/soc/intel/baytrail/romstage/cache_as_ram.inc6
-rw-r--r--src/soc/intel/baytrail/romstage/romstage.c51
7 files changed, 88 insertions, 6 deletions
diff --git a/src/soc/intel/baytrail/Kconfig b/src/soc/intel/baytrail/Kconfig
index deee31a708..71a40c1ff4 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 ebcda6b93e..b4474c05a3 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 6c622e19e7..b797e8e82b 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 0000000000..3a4025198c
--- /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 0000000000..3db5c35c4d
--- /dev/null
+++ b/src/soc/intel/baytrail/bootblock/timestamp.inc
@@ -0,0 +1,18 @@
+/* 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 920fbe4b09..82c77e2b16 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 e4e6fdecee..8a65f06857 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);