reset.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <cf9_reset.h>
#include <console/console.h>
#include <delay.h>
#include <intelblocks/pmclib.h>
#include <soc/heci.h>
#include <soc/intel/common/reset.h>
#include <soc/pm.h>
#include <timer.h>
 
#define CSE_WAIT_MAX_MS                                                 1000
 
void do_global_reset(void)
{
        pmc_global_reset_enable(1);
        do_full_reset();
}
 
void cf9_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));
}