Aaron Durbin | 9a7d7bc | 2013-09-07 00:41:48 -0500 | [diff] [blame] | 1 | /* |
| 2 | * This file is part of the coreboot project. |
| 3 | * |
| 4 | * Copyright (C) 2013 Google, Inc. |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; version 2 of the License. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
Aaron Durbin | 2c4aab3 | 2015-03-06 23:26:06 -0600 | [diff] [blame] | 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
Aaron Durbin | 9a7d7bc | 2013-09-07 00:41:48 -0500 | [diff] [blame] | 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License for more details. |
Aaron Durbin | 9a7d7bc | 2013-09-07 00:41:48 -0500 | [diff] [blame] | 14 | */ |
| 15 | |
Aaron Durbin | 9a7d7bc | 2013-09-07 00:41:48 -0500 | [diff] [blame] | 16 | #include <cbmem.h> |
Kyösti Mälkki | 568a42a | 2019-08-14 06:48:28 +0300 | [diff] [blame] | 17 | #include <cpu/x86/smm.h> |
Julius Werner | 18ea2d3 | 2014-10-07 16:42:17 -0700 | [diff] [blame] | 18 | #include <soc/iosf.h> |
Aaron Durbin | 7837be6 | 2013-10-21 22:32:00 -0500 | [diff] [blame] | 19 | |
Kyösti Mälkki | 568a42a | 2019-08-14 06:48:28 +0300 | [diff] [blame] | 20 | static uintptr_t smm_region_start(void) |
Aaron Durbin | 7837be6 | 2013-10-21 22:32:00 -0500 | [diff] [blame] | 21 | { |
Kyösti Mälkki | f1e3c76 | 2014-12-22 12:28:07 +0200 | [diff] [blame] | 22 | return (iosf_bunit_read(BUNIT_SMRRL) << 20); |
Aaron Durbin | 7837be6 | 2013-10-21 22:32:00 -0500 | [diff] [blame] | 23 | } |
Aaron Durbin | 9a7d7bc | 2013-09-07 00:41:48 -0500 | [diff] [blame] | 24 | |
Kyösti Mälkki | 568a42a | 2019-08-14 06:48:28 +0300 | [diff] [blame] | 25 | static size_t smm_region_size(void) |
| 26 | { |
| 27 | return CONFIG_SMM_TSEG_SIZE; |
| 28 | } |
| 29 | |
Kyösti Mälkki | f1e3c76 | 2014-12-22 12:28:07 +0200 | [diff] [blame] | 30 | void *cbmem_top(void) |
Aaron Durbin | 9a7d7bc | 2013-09-07 00:41:48 -0500 | [diff] [blame] | 31 | { |
Kyösti Mälkki | f1e3c76 | 2014-12-22 12:28:07 +0200 | [diff] [blame] | 32 | return (void *) smm_region_start(); |
Aaron Durbin | 9a7d7bc | 2013-09-07 00:41:48 -0500 | [diff] [blame] | 33 | } |
Kyösti Mälkki | 26a682c | 2019-08-02 06:13:22 +0300 | [diff] [blame] | 34 | |
Kyösti Mälkki | 568a42a | 2019-08-14 06:48:28 +0300 | [diff] [blame] | 35 | void smm_region(uintptr_t *start, size_t *size) |
Kyösti Mälkki | 26a682c | 2019-08-02 06:13:22 +0300 | [diff] [blame] | 36 | { |
Kyösti Mälkki | 568a42a | 2019-08-14 06:48:28 +0300 | [diff] [blame] | 37 | *start = (iosf_bunit_read(BUNIT_SMRRL) & 0xFFFF) << 20; |
| 38 | *size = smm_region_size(); |
Kyösti Mälkki | 26a682c | 2019-08-02 06:13:22 +0300 | [diff] [blame] | 39 | } |