diff options
Diffstat (limited to 'src/soc/intel/denverton_ns/memmap.c')
-rw-r--r-- | src/soc/intel/denverton_ns/memmap.c | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/src/soc/intel/denverton_ns/memmap.c b/src/soc/intel/denverton_ns/memmap.c new file mode 100644 index 0000000000..3fe41d2088 --- /dev/null +++ b/src/soc/intel/denverton_ns/memmap.c @@ -0,0 +1,108 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2015 - 2017 Intel Corp. + * + * 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; either version 2 of the License, or + * (at your option) any later version. + * + * 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/io.h> +#include <cbfs.h> +#include <cbmem.h> +#include <assert.h> +#include <device/device.h> +#include <device/pci_def.h> +#include <device/pci_ops.h> +#include <console/console.h> +#include <soc/pci_devs.h> +#include <soc/systemagent.h> +#include <soc/smm.h> +#include <lib.h> + +/* Returns base of requested region encoded in the system agent. */ +static inline uintptr_t system_agent_region_base(size_t reg) +{ + device_t dev = SA_DEV_ROOT; + + /* All regions concerned for have 1 MiB alignment. */ + return ALIGN_DOWN(pci_read_config32(dev, reg), 1 * MiB); +} + +/* Returns min power of 2 >= size */ +static inline u32 power_of_2(u32 size) +{ + return size ? 1 << (1 + log2(size - 1)) : 0; +} + +u32 top_of_32bit_ram(void) +{ + u32 iqat_region_size = 0; + u32 tseg_region_size = system_agent_region_base(TOLUD) - + system_agent_region_base(TSEGMB); + +/* + * Add IQAT region size if enabled. + */ +#if IS_ENABLED(CONFIG_IQAT_ENABLE) + iqat_region_size = CONFIG_IQAT_MEMORY_REGION_SIZE; +#endif + return system_agent_region_base(TOLUD) - + power_of_2(iqat_region_size + tseg_region_size); +} + +void *cbmem_top(void) { return (void *)top_of_32bit_ram(); } + +static inline uintptr_t smm_region_start(void) +{ + return system_agent_region_base(TSEGMB); +} + +static inline size_t smm_region_size(void) +{ + return system_agent_region_base(TOLUD) - smm_region_start(); +} + +void smm_region(void **start, size_t *size) +{ + *start = (void *)smm_region_start(); + *size = smm_region_size(); +} + +int smm_subregion(int sub, void **start, size_t *size) +{ + uintptr_t sub_base; + size_t sub_size; + const size_t cache_size = CONFIG_SMM_RESERVED_SIZE; + + sub_base = smm_region_start(); + sub_size = smm_region_size(); + + assert(sub_size > CONFIG_SMM_RESERVED_SIZE); + + switch (sub) { + case SMM_SUBREGION_HANDLER: + /* Handler starts at the base of TSEG. */ + sub_size -= cache_size; + break; + case SMM_SUBREGION_CACHE: + /* External cache is in the middle of TSEG. */ + sub_base += sub_size - cache_size; + sub_size = cache_size; + break; + default: + return -1; + } + + *start = (void *)sub_base; + *size = sub_size; + + return 0; +} |