reset.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <cf9_reset.h>
#include <intelblocks/pmclib.h>
#include <soc/intel/common/reset.h>
#include <soc/me.h>
#include <soc/pm.h>
 
static void do_force_global_reset(void)
{
        /*
         * BIOS should ensure it does a global reset
         * to reset both host and Intel ME by setting
         * PCH PMC [B0:D31:F2 register offset 0xAC bit 20]
         */
        pmc_global_reset_enable(true);
 
        /* Now BIOS can write 0x06 or 0x0E to 0xCF9 port
         * to global reset platform */
        do_full_reset();
}
 
void do_global_reset(void)
{
        if (!send_global_reset()) {
                /* If ME unable to reset platform then
                 * force global reset using PMC CF9GR register*/
                do_force_global_reset();
        }
}