From a5be7fa5c14a56d8544502c54cccc43637fab258 Mon Sep 17 00:00:00 2001 From: Aaron Durbin Date: Thu, 10 Sep 2015 22:52:27 -0500 Subject: drivers/intel/fsp1_1: split relocation code for tool use In order for easier consumption in userland tools split the FSP 1.1 relocation logic into a single file w/ an aptly named function name. BUG=chrome-os-partner:44827 BRANCH=None TEST=Built and booted glados. Change-Id: I49998b8621611c638375bc90884e80d0cd3bdf78 Signed-off-by: Patrick Georgi Original-Commit-Id: bc898e1c528df60683575d553d6194a1e8200afa Original-Change-Id: I736c0059d43f6d0be4fdb6e6f47cdb5c189a7ae8 Original-Signed-off-by: Aaron Durbin Original-Reviewed-on: https://chromium-review.googlesource.com/298833 Original-Reviewed-by: Duncan Laurie Reviewed-on: http://review.coreboot.org/11665 Tested-by: build bot (Jenkins) Reviewed-by: Aaron Durbin --- src/drivers/intel/fsp1_1/Makefile.inc | 1 + src/drivers/intel/fsp1_1/fsp1_1_relocate.c | 539 ++++++++++++++++++++++++++++ src/drivers/intel/fsp1_1/fsp_relocate.c | 519 +------------------------- src/drivers/intel/fsp1_1/include/fsp/util.h | 6 + 4 files changed, 547 insertions(+), 518 deletions(-) create mode 100644 src/drivers/intel/fsp1_1/fsp1_1_relocate.c (limited to 'src/drivers') diff --git a/src/drivers/intel/fsp1_1/Makefile.inc b/src/drivers/intel/fsp1_1/Makefile.inc index bab68e142d..dffb6d2079 100644 --- a/src/drivers/intel/fsp1_1/Makefile.inc +++ b/src/drivers/intel/fsp1_1/Makefile.inc @@ -23,6 +23,7 @@ romstage-y += hob.c ramstage-$(CONFIG_GOP_SUPPORT) += fsp_gop.c ramstage-y += fsp_relocate.c +ramstage-y += fsp1_1_relocate.c ramstage-y += fsp_util.c ramstage-y += hob.c diff --git a/src/drivers/intel/fsp1_1/fsp1_1_relocate.c b/src/drivers/intel/fsp1_1/fsp1_1_relocate.c new file mode 100644 index 0000000000..d57a18c4e1 --- /dev/null +++ b/src/drivers/intel/fsp1_1/fsp1_1_relocate.c @@ -0,0 +1,539 @@ +/* + * This file is part of the coreboot project. + * + * Copyright 2015 Google Inc + * + * 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. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc. + */ + +#include +#include +#include +#include +#include +#include +#include + +#define FSP_DBG_LVL BIOS_NEVER + +/* + * UEFI defines everything as little endian. However, this piece of code + * can be integrated in a userland tool. That tool could be on a big endian + * machine so one needs to access the fields within UEFI structures using + * endian-aware accesses. + */ + +/* Return 0 if equal. Non-zero if not equal. */ +static int guid_compare(const EFI_GUID *le_guid, const EFI_GUID *native_guid) +{ + if (le32toh(le_guid->Data1) != native_guid->Data1) + return 1; + if (le16toh(le_guid->Data2) != native_guid->Data2) + return 1; + if (le16toh(le_guid->Data3) != native_guid->Data3) + return 1; + return memcmp(le_guid->Data4, native_guid->Data4, + ARRAY_SIZE(le_guid->Data4)); +} + +/* Provide this for symmetry when accessing UEFI fields. */ +static inline uint8_t le8toh(uint8_t byte) +{ + return byte; +} + +static const EFI_GUID ffs2_guid = EFI_FIRMWARE_FILE_SYSTEM2_GUID; +static const EFI_GUID fih_guid = FSP_INFO_HEADER_GUID; + +struct fsp_patch_table { + uint32_t signature; + uint16_t header_length; + uint8_t header_revision; + uint8_t reserved; + uint32_t patch_entry_num; + uint32_t patch_entries[0]; +} __attribute__((packed)); + +#define FSPP_SIG 0x50505346 + +static void *relative_offset(void *base, ssize_t offset) +{ + uintptr_t loc; + + loc = (uintptr_t)base; + loc += offset; + + return (void *)loc; +} + +static uint32_t *fspp_reloc(void *fsp, size_t fsp_size, uint32_t e) +{ + size_t offset; + + /* Offsets live in bits 23:0. */ + offset = e & 0xffffff; + + /* If bit 31 is set then the offset is considered a negative value + * relative to the end of the image using 16MiB as the offset's + * reference. */ + if (e & (1 << 31)) + offset = fsp_size - (16 * MiB - offset); + + /* Determine if offset falls within fsp_size for a 32 bit relocation. */ + if (offset > fsp_size - sizeof(uint32_t)) + return NULL; + + return relative_offset(fsp, offset); +} + +static int reloc_type(uint16_t reloc_entry) +{ + /* Reloc type in upper 4 bits */ + return reloc_entry >> 12; +} + +static size_t reloc_offset(uint16_t reloc_entry) +{ + /* Offsets are in low 12 bits. */ + return reloc_entry & ((1 << 12) - 1); +} + +static int te_relocate(uintptr_t new_addr, void *te, size_t size) +{ + EFI_TE_IMAGE_HEADER *teih; + EFI_IMAGE_DATA_DIRECTORY *relocd; + EFI_IMAGE_BASE_RELOCATION *relocb; + uintptr_t image_base; + size_t fixup_offset; + size_t num_relocs; + uint16_t *reloc; + size_t relocd_offset; + uint8_t *te_base; + uint32_t adj; + + teih = te; + + if (le16toh(teih->Signature) != EFI_TE_IMAGE_HEADER_SIGNATURE) { + printk(BIOS_ERR, "TE Signature mismatch: %x vs %x\n", + le16toh(teih->Signature), + EFI_TE_IMAGE_HEADER_SIGNATURE); + return -1; + } + + /* + * A TE image is created by converting a PE file. Because of this + * the offsets within the headers are off. In order to calculate + * the correct releative offets one needs to subtract fixup_offset + * from the encoded offets. Similarly, the linked address of the + * program is found by adding the fixup_offset to the ImageBase. + */ + fixup_offset = le16toh(teih->StrippedSize); + fixup_offset -= sizeof(EFI_TE_IMAGE_HEADER); + /* Keep track of a base that is correctly adjusted so that offsets + * can be used directly. */ + te_base = te; + te_base -= fixup_offset; + + image_base = le64toh(teih->ImageBase); + adj = new_addr - (image_base + fixup_offset); + + printk(FSP_DBG_LVL, "TE Image %p -> %p adjust value: %x\n", + (void *)image_base, (void *)new_addr, adj); + + /* Adjust ImageBase for consistency. */ + teih->ImageBase = htole32(image_base + adj); + + relocd = &teih->DataDirectory[EFI_TE_IMAGE_DIRECTORY_ENTRY_BASERELOC]; + + relocd_offset = 0; + /* Though the field name is VirtualAddress it's actually relative to + * the beginning of the image which is linked at ImageBase. */ + relocb = relative_offset(te, + le32toh(relocd->VirtualAddress) - fixup_offset); + while (relocd_offset < relocd->Size) { + size_t rva_offset = le32toh(relocb->VirtualAddress); + + printk(FSP_DBG_LVL, "Relocs for RVA offset %zx\n", rva_offset); + num_relocs = le32toh(relocb->SizeOfBlock) - sizeof(*relocb); + num_relocs /= sizeof(uint16_t); + reloc = relative_offset(relocb, sizeof(*relocb)); + + printk(FSP_DBG_LVL, "Num relocs in block: %zx\n", num_relocs); + + while (num_relocs > 0) { + uint16_t reloc_val = le16toh(*reloc); + int type = reloc_type(reloc_val); + size_t offset = reloc_offset(reloc_val); + + printk(FSP_DBG_LVL, "reloc type %x offset %zx\n", + type, offset); + + if (type == EFI_IMAGE_REL_BASED_HIGHLOW) { + uint32_t *reloc_addr; + uint32_t val; + + offset += rva_offset; + reloc_addr = (void *)&te_base[offset]; + val = le32toh(*reloc_addr); + + printk(FSP_DBG_LVL, "Adjusting %p %x -> %x\n", + reloc_addr, val, val + adj); + *reloc_addr = htole32(val + adj); + } else if (type != EFI_IMAGE_REL_BASED_ABSOLUTE) { + printk(BIOS_ERR, "Unknown reloc type: %x\n", + type); + return -1; + } + num_relocs--; + reloc++; + } + + /* Track consumption of relocation directory contents. */ + relocd_offset += le32toh(relocb->SizeOfBlock); + /* Get next relocation block to process. */ + relocb = relative_offset(relocb, le32toh(relocb->SizeOfBlock)); + } + + return 0; +} + +static size_t csh_size(const EFI_COMMON_SECTION_HEADER *csh) +{ + size_t size; + + /* Unpack the array into a type that can be used. */ + size = 0; + size |= le8toh(csh->Size[0]) << 0; + size |= le8toh(csh->Size[1]) << 8; + size |= le8toh(csh->Size[2]) << 16; + + return size; +} + +static size_t section_data_offset(const EFI_COMMON_SECTION_HEADER *csh) +{ + if (csh_size(csh) == 0x00ffffff) + return sizeof(EFI_COMMON_SECTION_HEADER2); + else + return sizeof(EFI_COMMON_SECTION_HEADER); +} + +static size_t section_data_size(const EFI_COMMON_SECTION_HEADER *csh) +{ + size_t section_size; + + if (csh_size(csh) == 0x00ffffff) + section_size = le32toh(SECTION2_SIZE(csh)); + else + section_size = csh_size(csh); + + return section_size - section_data_offset(csh); +} + +static size_t file_section_offset(const EFI_FFS_FILE_HEADER *ffsfh) +{ + if (IS_FFS_FILE2(ffsfh)) + return sizeof(EFI_FFS_FILE_HEADER2); + else + return sizeof(EFI_FFS_FILE_HEADER); +} + +static size_t ffs_file_size(const EFI_FFS_FILE_HEADER *ffsfh) +{ + size_t size; + + if (IS_FFS_FILE2(ffsfh)) + size = le32toh(FFS_FILE2_SIZE(ffsfh)); + else { + size = le8toh(ffsfh->Size[0]) << 0; + size |= le8toh(ffsfh->Size[1]) << 8; + size |= le8toh(ffsfh->Size[2]) << 16; + } + return size; +} + +static int relocate_patch_table(void *fsp, size_t size, size_t offset, + ssize_t adjustment) +{ + struct fsp_patch_table *table; + size_t num; + size_t num_entries; + + table = relative_offset(fsp, offset); + + if ((offset + sizeof(*table) > size) || + (le16toh(table->header_length) + offset) > size) { + printk(BIOS_ERR, "FSPP not entirely contained in region.\n"); + return -1; + } + + num_entries = le32toh(table->patch_entry_num); + printk(FSP_DBG_LVL, "FSPP relocs: %zx\n", num_entries); + + for (num = 0; num < table->patch_entry_num; num++) { + uint32_t *reloc; + uint32_t reloc_val; + + reloc = fspp_reloc(fsp, size, + le32toh(table->patch_entries[num])); + + if (reloc == NULL) { + printk(BIOS_ERR, "Ignoring FSPP entry: %x\n", + le32toh(table->patch_entries[num])); + continue; + } + + reloc_val = le32toh(*reloc); + printk(FSP_DBG_LVL, "Adjusting %p %x -> %x\n", + reloc, reloc_val, + (unsigned int)(reloc_val + adjustment)); + + *reloc = htole32(reloc_val + adjustment); + } + + return 0; +} + +static ssize_t relocate_remaining_items(void *fsp, size_t size, + uintptr_t new_addr, size_t fih_offset) +{ + EFI_FFS_FILE_HEADER *ffsfh; + EFI_COMMON_SECTION_HEADER *csh; + FSP_INFO_HEADER *fih; + ssize_t adjustment; + size_t offset; + + printk(FSP_DBG_LVL, "FSP_INFO_HEADER offset is %zx\n", fih_offset); + + if (fih_offset == 0) { + printk(BIOS_ERR, "FSP_INFO_HEADER offset is 0.\n"); + return -1; + } + + /* FSP_INFO_HEADER at first file in FV within first RAW section. */ + ffsfh = relative_offset(fsp, fih_offset); + fih_offset += file_section_offset(ffsfh); + csh = relative_offset(fsp, fih_offset); + fih_offset += section_data_offset(csh); + fih = relative_offset(fsp, fih_offset); + + if (guid_compare(&ffsfh->Name, &fih_guid)) { + printk(BIOS_ERR, "Bad FIH GUID.\n"); + return -1; + } + + if (le8toh(csh->Type) != EFI_SECTION_RAW) { + printk(BIOS_ERR, "FIH file should have raw section: %x\n", + csh->Type); + return -1; + } + + if (le32toh(fih->Signature) != FSP_SIG) { + printk(BIOS_ERR, "Unexpected FIH signature: %08x\n", + le32toh(fih->Signature)); + return -1; + } + + adjustment = (intptr_t)new_addr - le32toh(fih->ImageBase); + + /* Update ImageBase to reflect FSP's new home. */ + fih->ImageBase = htole32(adjustment + le32toh(fih->ImageBase)); + + /* Need to find patch table and adjust each entry. The tables + * following FSP_INFO_HEADER have a 32-bit signature and header + * length. The patch table is denoted as having a 'FSPP' signature; + * the table format doesn't follow the other tables. */ + offset = fih_offset + le32toh(fih->HeaderLength); + while (offset + 2 * sizeof(uint32_t) <= size) { + uint32_t *table_headers; + + table_headers = relative_offset(fsp, offset); + + printk(FSP_DBG_LVL, "Checking offset %zx for 'FSPP'\n", + offset); + + if (le32toh(table_headers[0]) != FSPP_SIG) { + offset += le32toh(table_headers[1]); + continue; + } + + if (relocate_patch_table(fsp, size, offset, adjustment)) { + printk(BIOS_ERR, "FSPP relocation failed.\n"); + return -1; + } + + return fih_offset; + } + + printk(BIOS_ERR, "Could not find the FSP patch table.\n"); + return -1; +} + +static ssize_t relocate_fvh(uintptr_t new_addr, void *fsp, size_t fsp_size, + size_t fvh_offset, size_t *fih_offset) +{ + EFI_FIRMWARE_VOLUME_HEADER *fvh; + EFI_FFS_FILE_HEADER *ffsfh; + EFI_COMMON_SECTION_HEADER *csh; + size_t offset; + size_t file_offset; + size_t size; + size_t fv_length; + + offset = fvh_offset; + fvh = relative_offset(fsp, offset); + + if (le32toh(fvh->Signature) != EFI_FVH_SIGNATURE) + return -1; + + fv_length = le64toh(fvh->FvLength); + + printk(FSP_DBG_LVL, "FVH length: %zx Offset: %zx Mapping length: %zx\n", + fv_length, offset, fsp_size); + + if (fvh->FvLength + offset > fsp_size) + return -1; + + /* Parse only this FV. However, the algorithm uses offsets into the + * entire FSP region so make size include the starting offset. */ + size = fv_length + offset; + + if (guid_compare(&fvh->FileSystemGuid, &ffs2_guid)) { + printk(BIOS_ERR, "FVH not an FFS2 type.\n"); + return -1; + } + + if (le16toh(fvh->ExtHeaderOffset) != 0) { + EFI_FIRMWARE_VOLUME_EXT_HEADER *fveh; + + offset += le16toh(fvh->ExtHeaderOffset); + fveh = relative_offset(fsp, offset); + printk(FSP_DBG_LVL, "Extended Header Offset: %zx Size: %zx\n", + (size_t)le16toh(fvh->ExtHeaderOffset), + (size_t)le32toh(fveh->ExtHeaderSize)); + offset += le32toh(fveh->ExtHeaderSize); + /* FFS files are 8 byte aligned after extended header. */ + offset = ALIGN_UP(offset, 8); + } else { + offset += le16toh(fvh->HeaderLength); + } + + file_offset = offset; + while (file_offset + sizeof(*ffsfh) < size) { + offset = file_offset; + printk(FSP_DBG_LVL, "file offset: %zx\n", file_offset); + + /* First file and section should be FSP info header. */ + if (fih_offset != NULL && *fih_offset == 0) + *fih_offset = file_offset; + + ffsfh = relative_offset(fsp, file_offset); + + printk(FSP_DBG_LVL, "file type = %x\n", le8toh(ffsfh->Type)); + printk(FSP_DBG_LVL, "file attribs = %x\n", + le8toh(ffsfh->Attributes)); + + /* Exit FV relocation when empty space found */ + if (le8toh(ffsfh->Type) == EFI_FV_FILETYPE_FFS_MAX) + break; + + /* Next file on 8 byte alignment. */ + file_offset += ffs_file_size(ffsfh); + file_offset = ALIGN_UP(file_offset, 8); + + /* Padding files have no section information. */ + if (le8toh(ffsfh->Type) == EFI_FV_FILETYPE_FFS_PAD) + continue; + + offset += file_section_offset(ffsfh); + + while (offset + sizeof(*csh) < file_offset) { + size_t data_size; + size_t data_offset; + + csh = relative_offset(fsp, offset); + + printk(FSP_DBG_LVL, "section offset: %zx\n", offset); + printk(FSP_DBG_LVL, "section type: %x\n", + le8toh(csh->Type)); + + data_size = section_data_size(csh); + data_offset = section_data_offset(csh); + + if (data_size + data_offset + offset > file_offset) { + printk(BIOS_ERR, "Section exceeds FV size.\n"); + return -1; + } + + /* + * The entire FSP 1.1 image can be thought of as one + * program with a single link address even though there + * are multiple TEs linked separately. The reason is + * that each TE is linked for XIP. So in order to + * relocate the TE properly we need to form the + * relocated address based on the TE offset within + * FSP proper. + */ + if (le8toh(csh->Type) == EFI_SECTION_TE) { + void *te; + size_t te_offset = offset + data_offset; + uintptr_t te_addr = new_addr + te_offset; + + printk(FSP_DBG_LVL, "TE image at offset %zx\n", + te_offset); + te = relative_offset(fsp, te_offset); + te_relocate(te_addr, te, data_size); + } + + offset += data_size + data_offset; + /* Sections are aligned to 4 bytes. */ + offset = ALIGN_UP(offset, 4); + } + } + + /* Return amount of buffer parsed: FV size. */ + return fv_length; +} + +ssize_t fsp1_1_relocate(uintptr_t new_addr, void *fsp, size_t size) +{ + size_t offset; + size_t fih_offset; + + offset = 0; + fih_offset = 0; + while (offset < size) { + ssize_t nparsed; + + /* Relocate each FV within the FSP region. The FSP_INFO_HEADER + * should only be located in the first FV. */ + if (offset == 0) + nparsed = relocate_fvh(new_addr, fsp, size, offset, + &fih_offset); + else + nparsed = relocate_fvh(new_addr, fsp, size, offset, + NULL); + + /* FV should be larger than 0 or failed to parse. */ + if (nparsed <= 0) { + printk(BIOS_ERR, "FV @ offset %zx relocation failed\n", + offset); + return -1; + } + + offset += nparsed; + } + + return relocate_remaining_items(fsp, size, new_addr, fih_offset); +} diff --git a/src/drivers/intel/fsp1_1/fsp_relocate.c b/src/drivers/intel/fsp1_1/fsp_relocate.c index 6e2a2a7e55..da0b341491 100644 --- a/src/drivers/intel/fsp1_1/fsp_relocate.c +++ b/src/drivers/intel/fsp1_1/fsp_relocate.c @@ -19,524 +19,7 @@ #include #include -#include #include -#include -#include -#include - -#define FSP_DBG_LVL BIOS_NEVER - -/* - * UEFI defines everything as little endian. However, this piece of code - * can be integrated in a userland tool. That tool could be on a big endian - * machine so one needs to access the fields within UEFI structures using - * endian-aware accesses. - */ - -/* Return 0 if equal. Non-zero if not equal. */ -static int guid_compare(const EFI_GUID *le_guid, const EFI_GUID *native_guid) -{ - if (le32toh(le_guid->Data1) != native_guid->Data1) - return 1; - if (le16toh(le_guid->Data2) != native_guid->Data2) - return 1; - if (le16toh(le_guid->Data3) != native_guid->Data3) - return 1; - return memcmp(le_guid->Data4, native_guid->Data4, - ARRAY_SIZE(le_guid->Data4)); -} - -/* Provide this for symmetry when accessing UEFI fields. */ -static inline uint8_t le8toh(uint8_t byte) -{ - return byte; -} - -static const EFI_GUID ffs2_guid = EFI_FIRMWARE_FILE_SYSTEM2_GUID; -static const EFI_GUID fih_guid = FSP_INFO_HEADER_GUID; - -struct fsp_patch_table { - uint32_t signature; - uint16_t header_length; - uint8_t header_revision; - uint8_t reserved; - uint32_t patch_entry_num; - uint32_t patch_entries[0]; -} __attribute__((packed)); - -#define FSPP_SIG 0x50505346 - -static void *relative_offset(void *base, ssize_t offset) -{ - uintptr_t loc; - - loc = (uintptr_t)base; - loc += offset; - - return (void *)loc; -} - -static uint32_t *fspp_reloc(void *fsp, size_t fsp_size, uint32_t e) -{ - size_t offset; - - /* Offsets live in bits 23:0. */ - offset = e & 0xffffff; - - /* If bit 31 is set then the offset is considered a negative value - * relative to the end of the image using 16MiB as the offset's - * reference. */ - if (e & (1 << 31)) - offset = fsp_size - (16 * MiB - offset); - - /* Determine if offset falls within fsp_size for a 32 bit relocation. */ - if (offset > fsp_size - sizeof(uint32_t)) - return NULL; - - return relative_offset(fsp, offset); -} - -static int reloc_type(uint16_t reloc_entry) -{ - /* Reloc type in upper 4 bits */ - return reloc_entry >> 12; -} - -static size_t reloc_offset(uint16_t reloc_entry) -{ - /* Offsets are in low 12 bits. */ - return reloc_entry & ((1 << 12) - 1); -} - -static int te_relocate(uintptr_t new_addr, void *te, size_t size) -{ - EFI_TE_IMAGE_HEADER *teih; - EFI_IMAGE_DATA_DIRECTORY *relocd; - EFI_IMAGE_BASE_RELOCATION *relocb; - uintptr_t image_base; - size_t fixup_offset; - size_t num_relocs; - uint16_t *reloc; - size_t relocd_offset; - uint8_t *te_base; - uint32_t adj; - - teih = te; - - if (le16toh(teih->Signature) != EFI_TE_IMAGE_HEADER_SIGNATURE) { - printk(BIOS_ERR, "TE Signature mismatch: %x vs %x\n", - le16toh(teih->Signature), - EFI_TE_IMAGE_HEADER_SIGNATURE); - return -1; - } - - /* - * A TE image is created by converting a PE file. Because of this - * the offsets within the headers are off. In order to calculate - * the correct releative offets one needs to subtract fixup_offset - * from the encoded offets. Similarly, the linked address of the - * program is found by adding the fixup_offset to the ImageBase. - */ - fixup_offset = le16toh(teih->StrippedSize); - fixup_offset -= sizeof(EFI_TE_IMAGE_HEADER); - /* Keep track of a base that is correctly adjusted so that offsets - * can be used directly. */ - te_base = te; - te_base -= fixup_offset; - - image_base = le64toh(teih->ImageBase); - adj = new_addr - (image_base + fixup_offset); - - printk(FSP_DBG_LVL, "TE Image %p -> %p adjust value: %x\n", - (void *)image_base, (void *)new_addr, adj); - - /* Adjust ImageBase for consistency. */ - teih->ImageBase = htole32(image_base + adj); - - relocd = &teih->DataDirectory[EFI_TE_IMAGE_DIRECTORY_ENTRY_BASERELOC]; - - relocd_offset = 0; - /* Though the field name is VirtualAddress it's actually relative to - * the beginning of the image which is linked at ImageBase. */ - relocb = relative_offset(te, - le32toh(relocd->VirtualAddress) - fixup_offset); - while (relocd_offset < relocd->Size) { - size_t rva_offset = le32toh(relocb->VirtualAddress); - - printk(FSP_DBG_LVL, "Relocs for RVA offset %zx\n", rva_offset); - num_relocs = le32toh(relocb->SizeOfBlock) - sizeof(*relocb); - num_relocs /= sizeof(uint16_t); - reloc = relative_offset(relocb, sizeof(*relocb)); - - printk(FSP_DBG_LVL, "Num relocs in block: %zx\n", num_relocs); - - while (num_relocs > 0) { - uint16_t reloc_val = le16toh(*reloc); - int type = reloc_type(reloc_val); - size_t offset = reloc_offset(reloc_val); - - printk(FSP_DBG_LVL, "reloc type %x offset %zx\n", - type, offset); - - if (type == EFI_IMAGE_REL_BASED_HIGHLOW) { - uint32_t *reloc_addr; - uint32_t val; - - offset += rva_offset; - reloc_addr = (void *)&te_base[offset]; - val = le32toh(*reloc_addr); - - printk(FSP_DBG_LVL, "Adjusting %p %x -> %x\n", - reloc_addr, val, val + adj); - *reloc_addr = htole32(val + adj); - } else if (type != EFI_IMAGE_REL_BASED_ABSOLUTE) { - printk(BIOS_ERR, "Unknown reloc type: %x\n", - type); - return -1; - } - num_relocs--; - reloc++; - } - - /* Track consumption of relocation directory contents. */ - relocd_offset += le32toh(relocb->SizeOfBlock); - /* Get next relocation block to process. */ - relocb = relative_offset(relocb, le32toh(relocb->SizeOfBlock)); - } - - return 0; -} - -static size_t csh_size(const EFI_COMMON_SECTION_HEADER *csh) -{ - size_t size; - - /* Unpack the array into a type that can be used. */ - size = 0; - size |= le8toh(csh->Size[0]) << 0; - size |= le8toh(csh->Size[1]) << 8; - size |= le8toh(csh->Size[2]) << 16; - - return size; -} - -static size_t section_data_offset(const EFI_COMMON_SECTION_HEADER *csh) -{ - if (csh_size(csh) == 0x00ffffff) - return sizeof(EFI_COMMON_SECTION_HEADER2); - else - return sizeof(EFI_COMMON_SECTION_HEADER); -} - -static size_t section_data_size(const EFI_COMMON_SECTION_HEADER *csh) -{ - size_t section_size; - - if (csh_size(csh) == 0x00ffffff) - section_size = le32toh(SECTION2_SIZE(csh)); - else - section_size = csh_size(csh); - - return section_size - section_data_offset(csh); -} - -static size_t file_section_offset(const EFI_FFS_FILE_HEADER *ffsfh) -{ - if (IS_FFS_FILE2(ffsfh)) - return sizeof(EFI_FFS_FILE_HEADER2); - else - return sizeof(EFI_FFS_FILE_HEADER); -} - -static size_t ffs_file_size(const EFI_FFS_FILE_HEADER *ffsfh) -{ - size_t size; - - if (IS_FFS_FILE2(ffsfh)) - size = le32toh(FFS_FILE2_SIZE(ffsfh)); - else { - size = le8toh(ffsfh->Size[0]) << 0; - size |= le8toh(ffsfh->Size[1]) << 8; - size |= le8toh(ffsfh->Size[2]) << 16; - } - return size; -} - -static int relocate_patch_table(void *fsp, size_t size, size_t offset, - ssize_t adjustment) -{ - struct fsp_patch_table *table; - size_t num; - size_t num_entries; - - table = relative_offset(fsp, offset); - - if ((offset + sizeof(*table) > size) || - (le16toh(table->header_length) + offset) > size) { - printk(BIOS_ERR, "FSPP not entirely contained in region.\n"); - return -1; - } - - num_entries = le32toh(table->patch_entry_num); - printk(FSP_DBG_LVL, "FSPP relocs: %zx\n", num_entries); - - for (num = 0; num < table->patch_entry_num; num++) { - uint32_t *reloc; - uint32_t reloc_val; - - reloc = fspp_reloc(fsp, size, - le32toh(table->patch_entries[num])); - - if (reloc == NULL) { - printk(BIOS_ERR, "Ignoring FSPP entry: %x\n", - le32toh(table->patch_entries[num])); - continue; - } - - reloc_val = le32toh(*reloc); - printk(FSP_DBG_LVL, "Adjusting %p %x -> %x\n", - reloc, reloc_val, - (unsigned int)(reloc_val + adjustment)); - - *reloc = htole32(reloc_val + adjustment); - } - - return 0; -} - -static ssize_t relocate_remaining_items(void *fsp, size_t size, - uintptr_t new_addr, size_t fih_offset) -{ - EFI_FFS_FILE_HEADER *ffsfh; - EFI_COMMON_SECTION_HEADER *csh; - FSP_INFO_HEADER *fih; - ssize_t adjustment; - size_t offset; - - printk(FSP_DBG_LVL, "FSP_INFO_HEADER offset is %zx\n", fih_offset); - - if (fih_offset == 0) { - printk(BIOS_ERR, "FSP_INFO_HEADER offset is 0.\n"); - return -1; - } - - /* FSP_INFO_HEADER at first file in FV within first RAW section. */ - ffsfh = relative_offset(fsp, fih_offset); - fih_offset += file_section_offset(ffsfh); - csh = relative_offset(fsp, fih_offset); - fih_offset += section_data_offset(csh); - fih = relative_offset(fsp, fih_offset); - - if (guid_compare(&ffsfh->Name, &fih_guid)) { - printk(BIOS_ERR, "Bad FIH GUID.\n"); - return -1; - } - - if (le8toh(csh->Type) != EFI_SECTION_RAW) { - printk(BIOS_ERR, "FIH file should have raw section: %x\n", - csh->Type); - return -1; - } - - if (le32toh(fih->Signature) != FSP_SIG) { - printk(BIOS_ERR, "Unexpected FIH signature: %08x\n", - le32toh(fih->Signature)); - return -1; - } - - adjustment = (intptr_t)new_addr - le32toh(fih->ImageBase); - - /* Update ImageBase to reflect FSP's new home. */ - fih->ImageBase = htole32(adjustment + le32toh(fih->ImageBase)); - - /* Need to find patch table and adjust each entry. The tables - * following FSP_INFO_HEADER have a 32-bit signature and header - * length. The patch table is denoted as having a 'FSPP' signature; - * the table format doesn't follow the other tables. */ - offset = fih_offset + le32toh(fih->HeaderLength); - while (offset + 2 * sizeof(uint32_t) <= size) { - uint32_t *table_headers; - - table_headers = relative_offset(fsp, offset); - - printk(FSP_DBG_LVL, "Checking offset %zx for 'FSPP'\n", - offset); - - if (le32toh(table_headers[0]) != FSPP_SIG) { - offset += le32toh(table_headers[1]); - continue; - } - - if (relocate_patch_table(fsp, size, offset, adjustment)) { - printk(BIOS_ERR, "FSPP relocation failed.\n"); - return -1; - } - - return fih_offset; - } - - printk(BIOS_ERR, "Could not find the FSP patch table.\n"); - return -1; -} - -static ssize_t relocate_fvh(uintptr_t new_addr, void *fsp, size_t fsp_size, - size_t fvh_offset, size_t *fih_offset) -{ - EFI_FIRMWARE_VOLUME_HEADER *fvh; - EFI_FFS_FILE_HEADER *ffsfh; - EFI_COMMON_SECTION_HEADER *csh; - size_t offset; - size_t file_offset; - size_t size; - size_t fv_length; - - offset = fvh_offset; - fvh = relative_offset(fsp, offset); - - if (le32toh(fvh->Signature) != EFI_FVH_SIGNATURE) - return -1; - - fv_length = le64toh(fvh->FvLength); - - printk(FSP_DBG_LVL, "FVH length: %zx Offset: %zx Mapping length: %zx\n", - fv_length, offset, fsp_size); - - if (fvh->FvLength + offset > fsp_size) - return -1; - - /* Parse only this FV. However, the algorithm uses offsets into the - * entire FSP region so make size include the starting offset. */ - size = fv_length + offset; - - if (guid_compare(&fvh->FileSystemGuid, &ffs2_guid)) { - printk(BIOS_ERR, "FVH not an FFS2 type.\n"); - return -1; - } - - if (le16toh(fvh->ExtHeaderOffset) != 0) { - EFI_FIRMWARE_VOLUME_EXT_HEADER *fveh; - - offset += le16toh(fvh->ExtHeaderOffset); - fveh = relative_offset(fsp, offset); - printk(FSP_DBG_LVL, "Extended Header Offset: %zx Size: %zx\n", - (size_t)le16toh(fvh->ExtHeaderOffset), - (size_t)le32toh(fveh->ExtHeaderSize)); - offset += le32toh(fveh->ExtHeaderSize); - /* FFS files are 8 byte aligned after extended header. */ - offset = ALIGN_UP(offset, 8); - } else { - offset += le16toh(fvh->HeaderLength); - } - - file_offset = offset; - while (file_offset + sizeof(*ffsfh) < size) { - offset = file_offset; - printk(FSP_DBG_LVL, "file offset: %zx\n", file_offset); - - /* First file and section should be FSP info header. */ - if (fih_offset != NULL && *fih_offset == 0) - *fih_offset = file_offset; - - ffsfh = relative_offset(fsp, file_offset); - - printk(FSP_DBG_LVL, "file type = %x\n", le8toh(ffsfh->Type)); - printk(FSP_DBG_LVL, "file attribs = %x\n", - le8toh(ffsfh->Attributes)); - - /* Exit FV relocation when empty space found */ - if (le8toh(ffsfh->Type) == EFI_FV_FILETYPE_FFS_MAX) - break; - - /* Next file on 8 byte alignment. */ - file_offset += ffs_file_size(ffsfh); - file_offset = ALIGN_UP(file_offset, 8); - - /* Padding files have no section information. */ - if (le8toh(ffsfh->Type) == EFI_FV_FILETYPE_FFS_PAD) - continue; - - offset += file_section_offset(ffsfh); - - while (offset + sizeof(*csh) < file_offset) { - size_t data_size; - size_t data_offset; - - csh = relative_offset(fsp, offset); - - printk(FSP_DBG_LVL, "section offset: %zx\n", offset); - printk(FSP_DBG_LVL, "section type: %x\n", - le8toh(csh->Type)); - - data_size = section_data_size(csh); - data_offset = section_data_offset(csh); - - if (data_size + data_offset + offset > file_offset) { - printk(BIOS_ERR, "Section exceeds FV size.\n"); - return -1; - } - - /* - * The entire FSP 1.1 image can be thought of as one - * program with a single link address even though there - * are multiple TEs linked separately. The reason is - * that each TE is linked for XIP. So in order to - * relocate the TE properly we need to form the - * relocated address based on the TE offset within - * FSP proper. - */ - if (le8toh(csh->Type) == EFI_SECTION_TE) { - void *te; - size_t te_offset = offset + data_offset; - uintptr_t te_addr = new_addr + te_offset; - - printk(FSP_DBG_LVL, "TE image at offset %zx\n", - te_offset); - te = relative_offset(fsp, te_offset); - te_relocate(te_addr, te, data_size); - } - - offset += data_size + data_offset; - /* Sections are aligned to 4 bytes. */ - offset = ALIGN_UP(offset, 4); - } - } - - /* Return amount of buffer parsed: FV size. */ - return fv_length; -} - -static ssize_t fsp1_1_relocate(uintptr_t new_addr, void *fsp, size_t size) -{ - size_t offset; - size_t fih_offset; - - offset = 0; - fih_offset = 0; - while (offset < size) { - ssize_t nparsed; - - /* Relocate each FV within the FSP region. The FSP_INFO_HEADER - * should only be located in the first FV. */ - if (offset == 0) - nparsed = relocate_fvh(new_addr, fsp, size, offset, - &fih_offset); - else - nparsed = relocate_fvh(new_addr, fsp, size, offset, - NULL); - - /* FV should be larger than 0 or failed to parse. */ - if (nparsed <= 0) { - printk(BIOS_ERR, "FV @ offset %zx relocation failed\n", - offset); - return -1; - } - - offset += nparsed; - } - - return relocate_remaining_items(fsp, size, new_addr, fih_offset); -} int fsp_relocate(struct prog *fsp_relocd, const struct region_device *fsp_src) { @@ -564,7 +47,7 @@ int fsp_relocate(struct prog *fsp_relocd, const struct region_device *fsp_src) return -1; } - fih = relative_offset(new_loc, fih_offset); + fih = (void *)((uint8_t *)new_loc + fih_offset); prog_set_area(fsp_relocd, new_loc, size); prog_set_entry(fsp_relocd, fih, NULL); diff --git a/src/drivers/intel/fsp1_1/include/fsp/util.h b/src/drivers/intel/fsp1_1/include/fsp/util.h index 9695b3b697..041c0f1200 100644 --- a/src/drivers/intel/fsp1_1/include/fsp/util.h +++ b/src/drivers/intel/fsp1_1/include/fsp/util.h @@ -53,6 +53,12 @@ void *get_first_resource_hob(const EFI_GUID *guid); */ int fsp_relocate(struct prog *fsp_relocd, const struct region_device *fsp_src); +/* + * Relocate FSP held within buffer defined by size to new_addr. Returns < 0 + * on error, offset to FSP_INFO_HEADER on success. + */ +ssize_t fsp1_1_relocate(uintptr_t new_addr, void *fsp, size_t size); + /* Additional HOB types not included in the FSP: * #define EFI_HOB_TYPE_HANDOFF 0x0001 * #define EFI_HOB_TYPE_MEMORY_ALLOCATION 0x0002 -- cgit v1.2.3