From fed4303b45aa3c8ba98cd2ab90cf5bf023fc6aae Mon Sep 17 00:00:00 2001 From: Andrey Petrov Date: Mon, 5 Jun 2017 18:09:51 -0700 Subject: soc/intel/cannonlake: Add reset.c Add reset functionality. This implementation relies on CSE to trigger global reset. Change-Id: I7e6ae07a48f1cdc3d2f4cdb74246627d27253adf Signed-off-by: Andrey Petrov Reviewed-on: https://review.coreboot.org/20070 Tested-by: build bot (Jenkins) Reviewed-by: Aaron Durbin --- src/soc/intel/cannonlake/reset.c | 100 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 100 insertions(+) create mode 100644 src/soc/intel/cannonlake/reset.c (limited to 'src') diff --git a/src/soc/intel/cannonlake/reset.c b/src/soc/intel/cannonlake/reset.c new file mode 100644 index 0000000000..93714d3b9a --- /dev/null +++ b/src/soc/intel/cannonlake/reset.c @@ -0,0 +1,100 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2017 Intel Corporation. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include +#include +#include +#include +#include + +/* Reset Request */ +#define MKHI_GLOBAL_RESET 0x0b + +#define GR_ORIGIN_BIOS_MEM_INIT 0x01 +#define GR_ORIGIN_BIOS_POST 0x02 +#define GR_ORIGIN_MEBX 0x03 + +#define GLOBAL_RST_TYPE 0x01 + +#define BIOS_HOST_ADD 0x00 +#define HECI_MKHI_ADD 0x07 + +static int send_heci_reset_message(void) +{ + int status; + struct reset_reply { + u8 group_id; + u8 command; + u8 reserved; + u8 result; + } __attribute__ ((packed)) reply; + struct reset_message { + u8 group_id; + u8 cmd; + u8 reserved; + u8 result; + u8 req_origin; + u8 reset_type; + } __attribute__ ((packed)); + struct reset_message msg = { + .cmd = MKHI_GLOBAL_RESET, + .group_id = 0, + .reserved = 0, + .result = 0, + .req_origin = GR_ORIGIN_BIOS_POST, + .reset_type = GLOBAL_RST_TYPE + }; + size_t reply_size; + + heci_reset(); + + status = heci_send(&msg, sizeof(msg), BIOS_HOST_ADD, HECI_MKHI_ADD); + if (status != 1) + return -1; + + reply_size = sizeof(reply); + heci_receive(&reply, &reply_size); + /* get reply result from HECI MSG */ + if (reply.result != 0) { + printk(BIOS_DEBUG, "%s: Exit with Failure\n", __func__); + return -1; + } + printk(BIOS_DEBUG, "%s: Exit with Success\n", __func__); + return 0; +} + +void do_global_reset(void) +{ + /* Ask CSE to do the global reset */ + send_heci_reset_message(); + /* + * TODO: Presumbily we shouldn't return. But if we did, fallback to + * alternative way of triggered global reset provided by pmclib. + */ +} + +void chipset_handle_reset(uint32_t status) +{ + switch (status) { + case FSP_STATUS_RESET_REQUIRED_3: /* Global Reset */ + printk(BIOS_DEBUG, "GLOBAL RESET!!\n"); + do_global_reset(); + break; + default: + printk(BIOS_ERR, "unhandled reset type %x\n", status); + die("unknown reset type"); + break; + } +} -- cgit v1.2.3