diff options
Diffstat (limited to 'src')
-rw-r--r-- | src/drivers/intel/fsp2_0/memory_init.c | 84 |
1 files changed, 58 insertions, 26 deletions
diff --git a/src/drivers/intel/fsp2_0/memory_init.c b/src/drivers/intel/fsp2_0/memory_init.c index 70c920e3219b..642df460c05a 100644 --- a/src/drivers/intel/fsp2_0/memory_init.c +++ b/src/drivers/intel/fsp2_0/memory_init.c @@ -128,28 +128,61 @@ static void fsp_fill_mrc_cache(struct FSPM_ARCH_UPD *arch_upd, bool s3wake, mrc_cache->size, arch_upd->BootMode); } -static void fsp_fill_common_arch_params(struct FSPM_ARCH_UPD *arch_upd, - bool s3wake, uint32_t fsp_version) +static enum cb_err check_region_overlap(const struct memranges *ranges, + const char *description, + uintptr_t begin, uintptr_t end) { + const struct range_entry *r; + + memranges_each_entry(r, ranges) { + if (end <= range_entry_base(r)) + continue; + if (begin >= range_entry_end(r)) + continue; + printk(BIOS_ERR, "'%s' overlaps currently running program: " + "[%p, %p)\n", description, (void *)begin, (void *)end); + return CB_ERR; + } + + return CB_SUCCESS; +} + +static enum cb_err fsp_fill_common_arch_params(struct FSPM_ARCH_UPD *arch_upd, + bool s3wake, uint32_t fsp_version, + const struct memranges *memmap) +{ + uintptr_t stack_begin; + uintptr_t stack_end; + /* * FSPM_UPD passed here is populated with default values provided by * the blob itself. We let FSPM use top of CAR region of the size it * requests. - * TODO: add checks to avoid overlap/conflict of CAR usage. */ - arch_upd->StackBase = _car_region_end - arch_upd->StackSize; + stack_end = (uintptr_t)_car_region_end; + stack_begin = stack_end - arch_upd->StackSize; + + if (check_region_overlap(memmap, "FSPM stack", stack_begin, + stack_end) != CB_SUCCESS) + return CB_ERR; + + arch_upd->StackBase = (void *)stack_begin; arch_upd->BootMode = FSP_BOOT_WITH_FULL_CONFIGURATION; fsp_fill_mrc_cache(arch_upd, s3wake, fsp_version); + + return CB_SUCCESS; } -static enum fsp_status do_fsp_memory_init(struct fsp_header *hdr, bool s3wake) +static enum fsp_status do_fsp_memory_init(struct fsp_header *hdr, bool s3wake, + const struct memranges *memmap) { enum fsp_status status; fsp_memory_init_fn fsp_raminit; struct FSPM_UPD fspm_upd, *upd; void *hob_list_ptr; + struct FSPM_ARCH_UPD *arch_upd; post_code(0x34); @@ -163,12 +196,15 @@ static enum fsp_status do_fsp_memory_init(struct fsp_header *hdr, bool s3wake) /* Copy the default values from the UPD area */ memcpy(&fspm_upd, upd, sizeof(fspm_upd)); + arch_upd = &fspm_upd.FspmArchUpd; + /* Reserve enough memory under TOLUD to save CBMEM header */ - fspm_upd.FspmArchUpd.BootLoaderTolumSize = cbmem_overhead_size(); + arch_upd->BootLoaderTolumSize = cbmem_overhead_size(); /* Fill common settings on behalf of chipset. */ - fsp_fill_common_arch_params(&fspm_upd.FspmArchUpd, s3wake, - hdr->fsp_revision); + if (fsp_fill_common_arch_params(arch_upd, s3wake, hdr->fsp_revision, + memmap) != CB_SUCCESS) + return FSP_NOT_FOUND; /* Give SoC and mainboard a chance to update the UPD */ platform_fsp_memory_init_params_cb(&fspm_upd); @@ -196,11 +232,9 @@ static enum fsp_status do_fsp_memory_init(struct fsp_header *hdr, bool s3wake) /* Load the binary into the memory specified by the info header. */ static enum cb_err load_fspm_mem(struct fsp_header *hdr, - const struct region_device *rdev) + const struct region_device *rdev, + const struct memranges *memmap) { - struct memranges ranges; - struct range_entry freeranges[2]; - const struct range_entry *r; uintptr_t fspm_begin; uintptr_t fspm_end; @@ -210,19 +244,9 @@ static enum cb_err load_fspm_mem(struct fsp_header *hdr, fspm_begin = hdr->image_base; fspm_end = fspm_begin + hdr->image_size; - /* Build up memory map of romstage address space including CAR. */ - memranges_init_empty(&ranges, &freeranges[0], ARRAY_SIZE(freeranges)); - memranges_insert(&ranges, (uintptr_t)_car_region_start, - _car_relocatable_data_end - _car_region_start, 0); - memranges_insert(&ranges, (uintptr_t)_program, _program_size, 0); - memranges_each_entry(r, &ranges) { - if (fspm_end <= range_entry_base(r)) - continue; - if (fspm_begin >= range_entry_end(r)) - continue; - printk(BIOS_ERR, "FSPM overlaps currently running program.\n"); + if (check_region_overlap(memmap, "FSPM", fspm_begin, fspm_end) != + CB_SUCCESS) return CB_ERR; - } /* Load binary into memory at provided address. */ if (rdev_readat(rdev, (void *)fspm_begin, 0, fspm_end - fspm_begin) < 0) @@ -261,6 +285,8 @@ enum fsp_status fsp_memory_init(bool s3wake) struct cbfsf file_desc; struct region_device file_data; const char *name = CONFIG_FSP_M_CBFS; + struct memranges memmap; + struct range_entry freeranges[2]; if (cbfs_boot_locate(&file_desc, name, NULL)) { printk(BIOS_ERR, "Could not locate %s in CBFS\n", name); @@ -269,8 +295,14 @@ enum fsp_status fsp_memory_init(bool s3wake) cbfs_file_data(&file_data, &file_desc); + /* Build up memory map of romstage address space including CAR. */ + memranges_init_empty(&memmap, &freeranges[0], ARRAY_SIZE(freeranges)); + memranges_insert(&memmap, (uintptr_t)_car_region_start, + _car_relocatable_data_end - _car_region_start, 0); + memranges_insert(&memmap, (uintptr_t)_program, _program_size, 0); + if (IS_ENABLED(CONFIG_NO_XIP_EARLY_STAGES)) - status = load_fspm_mem(&hdr, &file_data); + status = load_fspm_mem(&hdr, &file_data, &memmap); else status = load_fspm_xip(&hdr, &file_data); @@ -282,5 +314,5 @@ enum fsp_status fsp_memory_init(bool s3wake) /* Signal that FSP component has been loaded. */ prog_segment_loaded(hdr.image_base, hdr.image_size, SEG_FINAL); - return do_fsp_memory_init(&hdr, s3wake); + return do_fsp_memory_init(&hdr, s3wake, &memmap); } |