diff options
Diffstat (limited to 'src/soc/intel/apollolake/reset.c')
| -rw-r--r-- | src/soc/intel/apollolake/reset.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/src/soc/intel/apollolake/reset.c b/src/soc/intel/apollolake/reset.c index 644d88d882..f759bac06b 100644 --- a/src/soc/intel/apollolake/reset.c +++ b/src/soc/intel/apollolake/reset.c @@ -13,11 +13,47 @@ * GNU General Public License for more details. */ +#include <console/console.h> +#include <delay.h> #include <reset.h> +#include <soc/heci.h> #include <soc/pm.h> +#include <timer.h> + +#define CSE_WAIT_MAX_MS 1000 void global_reset(void) { global_reset_enable(1); hard_reset(); } + +void reset_prepare(void) +{ + struct stopwatch sw; + + /* + * If CSE state is something else than 'normal', it is probably in some + * recovery state. In this case there is no point in waiting for it to + * get ready so we cross fingers and reset. + */ + if (!heci_cse_normal()) { + printk(BIOS_DEBUG, "CSE is not in normal state, resetting\n"); + return; + } + + /* Reset if CSE is ready */ + if (heci_cse_done()) + return; + + printk(BIOS_SPEW, "CSE is not yet ready, waiting\n"); + stopwatch_init_msecs_expire(&sw, CSE_WAIT_MAX_MS); + while (!heci_cse_done()) { + if (stopwatch_expired(&sw)) { + printk(BIOS_SPEW, "CSE timed out. Resetting\n"); + return; + } + mdelay(1); + } + printk(BIOS_SPEW, "CSE took %lu ms\n", stopwatch_duration_msecs(&sw)); +} |