| /* |
| * 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 <compiler.h> |
| #include <console/console.h> |
| #include <intelblocks/cse.h> |
| #include <intelblocks/pmclib.h> |
| #include <fsp/util.h> |
| #include <reset.h> |
| #include <string.h> |
| #include <timer.h> |
| #include <soc/pci_devs.h> |
| |
| /* Reset Request */ |
| #define MKHI_GLOBAL_RESET 0x0b |
| #define MKHI_STATUS_SUCCESS 0 |
| |
| #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; |
| } __packed reply; |
| struct reset_message { |
| u8 group_id; |
| u8 cmd; |
| u8 reserved; |
| u8 result; |
| u8 req_origin; |
| u8 reset_type; |
| } __packed; |
| struct reset_message msg = { |
| .cmd = MKHI_GLOBAL_RESET, |
| .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); |
| memset(&reply, 0, reply_size); |
| if (!heci_receive(&reply, &reply_size)) |
| return -1; |
| if (reply.result != MKHI_STATUS_SUCCESS) { |
| printk(BIOS_DEBUG, "Returned Mkhi Status is not success!\n"); |
| return -1; |
| } |
| printk(BIOS_DEBUG, "Heci recieve success!\n"); |
| return 0; |
| } |
| |
| void do_global_reset(void) |
| { |
| /* Ask CSE to do the global reset */ |
| if (!send_heci_reset_message()) |
| return; |
| |
| /* global reset if CSE fail to reset */ |
| pmc_global_reset_enable(1); |
| hard_reset(); |
| } |
| |
| 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; |
| } |
| } |