| /* |
| * This file is part of the coreboot project. |
| * |
| * Copyright (C) 2015-2016 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 <arch/cpu.h> |
| #include <arch/romstage.h> |
| #include <cbmem.h> |
| #include <soc/reg_access.h> |
| |
| void *cbmem_top(void) |
| { |
| uint32_t top_of_memory; |
| |
| /* Determine the TSEG base */ |
| top_of_memory = reg_host_bridge_unit_read(QNC_MSG_FSBIC_REG_HSMMC); |
| top_of_memory &= SMM_START_MASK; |
| top_of_memory <<= 16; |
| |
| /* Reserve 64 KiB for RMU firmware */ |
| if (top_of_memory) |
| top_of_memory -= 0x10000; |
| |
| /* Return the top of memory */ |
| return (void *)top_of_memory; |
| } |
| |
| void fill_postcar_frame(struct postcar_frame *pcf) |
| { |
| uintptr_t top_of_ram; |
| uintptr_t top_of_low_usable_memory; |
| |
| /* Locate the top of RAM */ |
| top_of_low_usable_memory = (uintptr_t) cbmem_top(); |
| top_of_ram = ALIGN(top_of_low_usable_memory, 16 * MiB); |
| |
| /* Cache postcar and ramstage */ |
| postcar_frame_add_mtrr(pcf, top_of_ram - (16 * MiB), 16 * MiB, |
| MTRR_TYPE_WRBACK); |
| |
| /* Cache RMU area */ |
| postcar_frame_add_mtrr(pcf, (uintptr_t) top_of_low_usable_memory, |
| 0x10000, MTRR_TYPE_WRTHROUGH); |
| |
| /* Cache ESRAM */ |
| postcar_frame_add_mtrr(pcf, 0x80000000, 0x80000, MTRR_TYPE_WRBACK); |
| |
| pcf->skip_common_mtrr = 1; |
| /* Cache SPI flash - Write protect not supported */ |
| postcar_frame_add_romcache(pcf, MTRR_TYPE_WRTHROUGH); |
| } |