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813 lines
21 KiB
813 lines
21 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* ----------------------------------------------------------------------- |
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* |
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* Copyright 2011 Intel Corporation; author Matt Fleming |
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* |
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* ----------------------------------------------------------------------- */ |
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#include <linux/efi.h> |
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#include <linux/pci.h> |
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#include <linux/stddef.h> |
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#include <asm/efi.h> |
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#include <asm/e820/types.h> |
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#include <asm/setup.h> |
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#include <asm/desc.h> |
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#include <asm/boot.h> |
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#include "efistub.h" |
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/* Maximum physical address for 64-bit kernel with 4-level paging */ |
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#define MAXMEM_X86_64_4LEVEL (1ull << 46) |
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const efi_system_table_t *efi_system_table; |
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extern u32 image_offset; |
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static efi_loaded_image_t *image = NULL; |
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static efi_status_t |
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preserve_pci_rom_image(efi_pci_io_protocol_t *pci, struct pci_setup_rom **__rom) |
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{ |
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struct pci_setup_rom *rom = NULL; |
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efi_status_t status; |
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unsigned long size; |
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uint64_t romsize; |
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void *romimage; |
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/* |
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* Some firmware images contain EFI function pointers at the place where |
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* the romimage and romsize fields are supposed to be. Typically the EFI |
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* code is mapped at high addresses, translating to an unrealistically |
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* large romsize. The UEFI spec limits the size of option ROMs to 16 |
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* MiB so we reject any ROMs over 16 MiB in size to catch this. |
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*/ |
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romimage = efi_table_attr(pci, romimage); |
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romsize = efi_table_attr(pci, romsize); |
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if (!romimage || !romsize || romsize > SZ_16M) |
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return EFI_INVALID_PARAMETER; |
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size = romsize + sizeof(*rom); |
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status = efi_bs_call(allocate_pool, EFI_LOADER_DATA, size, |
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(void **)&rom); |
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if (status != EFI_SUCCESS) { |
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efi_err("Failed to allocate memory for 'rom'\n"); |
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return status; |
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} |
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memset(rom, 0, sizeof(*rom)); |
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rom->data.type = SETUP_PCI; |
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rom->data.len = size - sizeof(struct setup_data); |
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rom->data.next = 0; |
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rom->pcilen = pci->romsize; |
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*__rom = rom; |
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status = efi_call_proto(pci, pci.read, EfiPciIoWidthUint16, |
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PCI_VENDOR_ID, 1, &rom->vendor); |
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if (status != EFI_SUCCESS) { |
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efi_err("Failed to read rom->vendor\n"); |
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goto free_struct; |
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} |
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status = efi_call_proto(pci, pci.read, EfiPciIoWidthUint16, |
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PCI_DEVICE_ID, 1, &rom->devid); |
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if (status != EFI_SUCCESS) { |
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efi_err("Failed to read rom->devid\n"); |
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goto free_struct; |
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} |
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status = efi_call_proto(pci, get_location, &rom->segment, &rom->bus, |
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&rom->device, &rom->function); |
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if (status != EFI_SUCCESS) |
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goto free_struct; |
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memcpy(rom->romdata, romimage, romsize); |
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return status; |
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free_struct: |
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efi_bs_call(free_pool, rom); |
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return status; |
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} |
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/* |
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* There's no way to return an informative status from this function, |
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* because any analysis (and printing of error messages) needs to be |
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* done directly at the EFI function call-site. |
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* |
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* For example, EFI_INVALID_PARAMETER could indicate a bug or maybe we |
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* just didn't find any PCI devices, but there's no way to tell outside |
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* the context of the call. |
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*/ |
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static void setup_efi_pci(struct boot_params *params) |
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{ |
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efi_status_t status; |
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void **pci_handle = NULL; |
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efi_guid_t pci_proto = EFI_PCI_IO_PROTOCOL_GUID; |
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unsigned long size = 0; |
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struct setup_data *data; |
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efi_handle_t h; |
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int i; |
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status = efi_bs_call(locate_handle, EFI_LOCATE_BY_PROTOCOL, |
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&pci_proto, NULL, &size, pci_handle); |
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if (status == EFI_BUFFER_TOO_SMALL) { |
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status = efi_bs_call(allocate_pool, EFI_LOADER_DATA, size, |
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(void **)&pci_handle); |
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if (status != EFI_SUCCESS) { |
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efi_err("Failed to allocate memory for 'pci_handle'\n"); |
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return; |
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} |
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status = efi_bs_call(locate_handle, EFI_LOCATE_BY_PROTOCOL, |
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&pci_proto, NULL, &size, pci_handle); |
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} |
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if (status != EFI_SUCCESS) |
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goto free_handle; |
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data = (struct setup_data *)(unsigned long)params->hdr.setup_data; |
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while (data && data->next) |
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data = (struct setup_data *)(unsigned long)data->next; |
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for_each_efi_handle(h, pci_handle, size, i) { |
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efi_pci_io_protocol_t *pci = NULL; |
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struct pci_setup_rom *rom; |
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status = efi_bs_call(handle_protocol, h, &pci_proto, |
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(void **)&pci); |
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if (status != EFI_SUCCESS || !pci) |
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continue; |
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status = preserve_pci_rom_image(pci, &rom); |
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if (status != EFI_SUCCESS) |
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continue; |
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if (data) |
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data->next = (unsigned long)rom; |
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else |
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params->hdr.setup_data = (unsigned long)rom; |
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data = (struct setup_data *)rom; |
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} |
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free_handle: |
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efi_bs_call(free_pool, pci_handle); |
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} |
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static void retrieve_apple_device_properties(struct boot_params *boot_params) |
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{ |
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efi_guid_t guid = APPLE_PROPERTIES_PROTOCOL_GUID; |
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struct setup_data *data, *new; |
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efi_status_t status; |
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u32 size = 0; |
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apple_properties_protocol_t *p; |
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status = efi_bs_call(locate_protocol, &guid, NULL, (void **)&p); |
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if (status != EFI_SUCCESS) |
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return; |
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if (efi_table_attr(p, version) != 0x10000) { |
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efi_err("Unsupported properties proto version\n"); |
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return; |
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} |
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efi_call_proto(p, get_all, NULL, &size); |
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if (!size) |
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return; |
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do { |
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status = efi_bs_call(allocate_pool, EFI_LOADER_DATA, |
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size + sizeof(struct setup_data), |
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(void **)&new); |
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if (status != EFI_SUCCESS) { |
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efi_err("Failed to allocate memory for 'properties'\n"); |
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return; |
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} |
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status = efi_call_proto(p, get_all, new->data, &size); |
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if (status == EFI_BUFFER_TOO_SMALL) |
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efi_bs_call(free_pool, new); |
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} while (status == EFI_BUFFER_TOO_SMALL); |
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new->type = SETUP_APPLE_PROPERTIES; |
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new->len = size; |
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new->next = 0; |
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data = (struct setup_data *)(unsigned long)boot_params->hdr.setup_data; |
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if (!data) { |
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boot_params->hdr.setup_data = (unsigned long)new; |
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} else { |
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while (data->next) |
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data = (struct setup_data *)(unsigned long)data->next; |
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data->next = (unsigned long)new; |
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} |
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} |
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static const efi_char16_t apple[] = L"Apple"; |
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static void setup_quirks(struct boot_params *boot_params) |
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{ |
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efi_char16_t *fw_vendor = (efi_char16_t *)(unsigned long) |
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efi_table_attr(efi_system_table, fw_vendor); |
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if (!memcmp(fw_vendor, apple, sizeof(apple))) { |
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if (IS_ENABLED(CONFIG_APPLE_PROPERTIES)) |
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retrieve_apple_device_properties(boot_params); |
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} |
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} |
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/* |
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* See if we have Universal Graphics Adapter (UGA) protocol |
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*/ |
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static efi_status_t |
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setup_uga(struct screen_info *si, efi_guid_t *uga_proto, unsigned long size) |
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{ |
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efi_status_t status; |
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u32 width, height; |
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void **uga_handle = NULL; |
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efi_uga_draw_protocol_t *uga = NULL, *first_uga; |
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efi_handle_t handle; |
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int i; |
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status = efi_bs_call(allocate_pool, EFI_LOADER_DATA, size, |
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(void **)&uga_handle); |
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if (status != EFI_SUCCESS) |
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return status; |
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status = efi_bs_call(locate_handle, EFI_LOCATE_BY_PROTOCOL, |
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uga_proto, NULL, &size, uga_handle); |
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if (status != EFI_SUCCESS) |
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goto free_handle; |
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height = 0; |
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width = 0; |
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first_uga = NULL; |
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for_each_efi_handle(handle, uga_handle, size, i) { |
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efi_guid_t pciio_proto = EFI_PCI_IO_PROTOCOL_GUID; |
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u32 w, h, depth, refresh; |
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void *pciio; |
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status = efi_bs_call(handle_protocol, handle, uga_proto, |
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(void **)&uga); |
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if (status != EFI_SUCCESS) |
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continue; |
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pciio = NULL; |
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efi_bs_call(handle_protocol, handle, &pciio_proto, &pciio); |
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status = efi_call_proto(uga, get_mode, &w, &h, &depth, &refresh); |
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if (status == EFI_SUCCESS && (!first_uga || pciio)) { |
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width = w; |
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height = h; |
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/* |
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* Once we've found a UGA supporting PCIIO, |
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* don't bother looking any further. |
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*/ |
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if (pciio) |
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break; |
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first_uga = uga; |
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} |
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} |
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if (!width && !height) |
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goto free_handle; |
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/* EFI framebuffer */ |
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si->orig_video_isVGA = VIDEO_TYPE_EFI; |
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si->lfb_depth = 32; |
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si->lfb_width = width; |
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si->lfb_height = height; |
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si->red_size = 8; |
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si->red_pos = 16; |
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si->green_size = 8; |
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si->green_pos = 8; |
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si->blue_size = 8; |
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si->blue_pos = 0; |
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si->rsvd_size = 8; |
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si->rsvd_pos = 24; |
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free_handle: |
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efi_bs_call(free_pool, uga_handle); |
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return status; |
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} |
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static void setup_graphics(struct boot_params *boot_params) |
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{ |
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efi_guid_t graphics_proto = EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID; |
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struct screen_info *si; |
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efi_guid_t uga_proto = EFI_UGA_PROTOCOL_GUID; |
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efi_status_t status; |
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unsigned long size; |
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void **gop_handle = NULL; |
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void **uga_handle = NULL; |
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si = &boot_params->screen_info; |
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memset(si, 0, sizeof(*si)); |
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size = 0; |
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status = efi_bs_call(locate_handle, EFI_LOCATE_BY_PROTOCOL, |
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&graphics_proto, NULL, &size, gop_handle); |
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if (status == EFI_BUFFER_TOO_SMALL) |
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status = efi_setup_gop(si, &graphics_proto, size); |
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if (status != EFI_SUCCESS) { |
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size = 0; |
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status = efi_bs_call(locate_handle, EFI_LOCATE_BY_PROTOCOL, |
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&uga_proto, NULL, &size, uga_handle); |
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if (status == EFI_BUFFER_TOO_SMALL) |
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setup_uga(si, &uga_proto, size); |
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} |
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} |
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static void __noreturn efi_exit(efi_handle_t handle, efi_status_t status) |
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{ |
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efi_bs_call(exit, handle, status, 0, NULL); |
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for(;;) |
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asm("hlt"); |
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} |
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void startup_32(struct boot_params *boot_params); |
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void __noreturn efi_stub_entry(efi_handle_t handle, |
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efi_system_table_t *sys_table_arg, |
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struct boot_params *boot_params); |
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/* |
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* Because the x86 boot code expects to be passed a boot_params we |
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* need to create one ourselves (usually the bootloader would create |
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* one for us). |
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*/ |
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efi_status_t __efiapi efi_pe_entry(efi_handle_t handle, |
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efi_system_table_t *sys_table_arg) |
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{ |
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struct boot_params *boot_params; |
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struct setup_header *hdr; |
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void *image_base; |
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efi_guid_t proto = LOADED_IMAGE_PROTOCOL_GUID; |
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int options_size = 0; |
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efi_status_t status; |
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char *cmdline_ptr; |
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efi_system_table = sys_table_arg; |
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/* Check if we were booted by the EFI firmware */ |
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if (efi_system_table->hdr.signature != EFI_SYSTEM_TABLE_SIGNATURE) |
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efi_exit(handle, EFI_INVALID_PARAMETER); |
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status = efi_bs_call(handle_protocol, handle, &proto, (void **)&image); |
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if (status != EFI_SUCCESS) { |
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efi_err("Failed to get handle for LOADED_IMAGE_PROTOCOL\n"); |
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efi_exit(handle, status); |
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} |
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image_base = efi_table_attr(image, image_base); |
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image_offset = (void *)startup_32 - image_base; |
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status = efi_allocate_pages(sizeof(struct boot_params), |
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(unsigned long *)&boot_params, ULONG_MAX); |
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if (status != EFI_SUCCESS) { |
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efi_err("Failed to allocate lowmem for boot params\n"); |
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efi_exit(handle, status); |
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} |
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memset(boot_params, 0x0, sizeof(struct boot_params)); |
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hdr = &boot_params->hdr; |
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/* Copy the setup header from the second sector to boot_params */ |
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memcpy(&hdr->jump, image_base + 512, |
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sizeof(struct setup_header) - offsetof(struct setup_header, jump)); |
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/* |
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* Fill out some of the header fields ourselves because the |
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* EFI firmware loader doesn't load the first sector. |
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*/ |
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hdr->root_flags = 1; |
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hdr->vid_mode = 0xffff; |
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hdr->boot_flag = 0xAA55; |
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hdr->type_of_loader = 0x21; |
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/* Convert unicode cmdline to ascii */ |
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cmdline_ptr = efi_convert_cmdline(image, &options_size); |
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if (!cmdline_ptr) |
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goto fail; |
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efi_set_u64_split((unsigned long)cmdline_ptr, |
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&hdr->cmd_line_ptr, &boot_params->ext_cmd_line_ptr); |
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hdr->ramdisk_image = 0; |
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hdr->ramdisk_size = 0; |
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efi_stub_entry(handle, sys_table_arg, boot_params); |
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/* not reached */ |
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fail: |
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efi_free(sizeof(struct boot_params), (unsigned long)boot_params); |
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efi_exit(handle, status); |
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} |
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static void add_e820ext(struct boot_params *params, |
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struct setup_data *e820ext, u32 nr_entries) |
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{ |
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struct setup_data *data; |
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e820ext->type = SETUP_E820_EXT; |
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e820ext->len = nr_entries * sizeof(struct boot_e820_entry); |
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e820ext->next = 0; |
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data = (struct setup_data *)(unsigned long)params->hdr.setup_data; |
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while (data && data->next) |
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data = (struct setup_data *)(unsigned long)data->next; |
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if (data) |
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data->next = (unsigned long)e820ext; |
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else |
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params->hdr.setup_data = (unsigned long)e820ext; |
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} |
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static efi_status_t |
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setup_e820(struct boot_params *params, struct setup_data *e820ext, u32 e820ext_size) |
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{ |
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struct boot_e820_entry *entry = params->e820_table; |
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struct efi_info *efi = ¶ms->efi_info; |
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struct boot_e820_entry *prev = NULL; |
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u32 nr_entries; |
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u32 nr_desc; |
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int i; |
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nr_entries = 0; |
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nr_desc = efi->efi_memmap_size / efi->efi_memdesc_size; |
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for (i = 0; i < nr_desc; i++) { |
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efi_memory_desc_t *d; |
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unsigned int e820_type = 0; |
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unsigned long m = efi->efi_memmap; |
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#ifdef CONFIG_X86_64 |
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m |= (u64)efi->efi_memmap_hi << 32; |
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#endif |
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d = efi_early_memdesc_ptr(m, efi->efi_memdesc_size, i); |
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switch (d->type) { |
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case EFI_RESERVED_TYPE: |
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case EFI_RUNTIME_SERVICES_CODE: |
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case EFI_RUNTIME_SERVICES_DATA: |
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case EFI_MEMORY_MAPPED_IO: |
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case EFI_MEMORY_MAPPED_IO_PORT_SPACE: |
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case EFI_PAL_CODE: |
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e820_type = E820_TYPE_RESERVED; |
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break; |
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case EFI_UNUSABLE_MEMORY: |
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e820_type = E820_TYPE_UNUSABLE; |
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break; |
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case EFI_ACPI_RECLAIM_MEMORY: |
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e820_type = E820_TYPE_ACPI; |
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break; |
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case EFI_LOADER_CODE: |
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case EFI_LOADER_DATA: |
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case EFI_BOOT_SERVICES_CODE: |
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case EFI_BOOT_SERVICES_DATA: |
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case EFI_CONVENTIONAL_MEMORY: |
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if (efi_soft_reserve_enabled() && |
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(d->attribute & EFI_MEMORY_SP)) |
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e820_type = E820_TYPE_SOFT_RESERVED; |
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else |
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e820_type = E820_TYPE_RAM; |
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break; |
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case EFI_ACPI_MEMORY_NVS: |
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e820_type = E820_TYPE_NVS; |
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break; |
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case EFI_PERSISTENT_MEMORY: |
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e820_type = E820_TYPE_PMEM; |
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break; |
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default: |
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continue; |
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} |
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/* Merge adjacent mappings */ |
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if (prev && prev->type == e820_type && |
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(prev->addr + prev->size) == d->phys_addr) { |
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prev->size += d->num_pages << 12; |
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continue; |
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} |
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if (nr_entries == ARRAY_SIZE(params->e820_table)) { |
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u32 need = (nr_desc - i) * sizeof(struct e820_entry) + |
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sizeof(struct setup_data); |
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if (!e820ext || e820ext_size < need) |
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return EFI_BUFFER_TOO_SMALL; |
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/* boot_params map full, switch to e820 extended */ |
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entry = (struct boot_e820_entry *)e820ext->data; |
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} |
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entry->addr = d->phys_addr; |
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entry->size = d->num_pages << PAGE_SHIFT; |
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entry->type = e820_type; |
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prev = entry++; |
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nr_entries++; |
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} |
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if (nr_entries > ARRAY_SIZE(params->e820_table)) { |
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u32 nr_e820ext = nr_entries - ARRAY_SIZE(params->e820_table); |
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add_e820ext(params, e820ext, nr_e820ext); |
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nr_entries -= nr_e820ext; |
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} |
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params->e820_entries = (u8)nr_entries; |
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return EFI_SUCCESS; |
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} |
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static efi_status_t alloc_e820ext(u32 nr_desc, struct setup_data **e820ext, |
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u32 *e820ext_size) |
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{ |
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efi_status_t status; |
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unsigned long size; |
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size = sizeof(struct setup_data) + |
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sizeof(struct e820_entry) * nr_desc; |
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if (*e820ext) { |
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efi_bs_call(free_pool, *e820ext); |
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*e820ext = NULL; |
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*e820ext_size = 0; |
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} |
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status = efi_bs_call(allocate_pool, EFI_LOADER_DATA, size, |
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(void **)e820ext); |
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if (status == EFI_SUCCESS) |
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*e820ext_size = size; |
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return status; |
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} |
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static efi_status_t allocate_e820(struct boot_params *params, |
|
struct setup_data **e820ext, |
|
u32 *e820ext_size) |
|
{ |
|
unsigned long map_size, desc_size, map_key; |
|
efi_status_t status; |
|
__u32 nr_desc, desc_version; |
|
|
|
/* Only need the size of the mem map and size of each mem descriptor */ |
|
map_size = 0; |
|
status = efi_bs_call(get_memory_map, &map_size, NULL, &map_key, |
|
&desc_size, &desc_version); |
|
if (status != EFI_BUFFER_TOO_SMALL) |
|
return (status != EFI_SUCCESS) ? status : EFI_UNSUPPORTED; |
|
|
|
nr_desc = map_size / desc_size + EFI_MMAP_NR_SLACK_SLOTS; |
|
|
|
if (nr_desc > ARRAY_SIZE(params->e820_table)) { |
|
u32 nr_e820ext = nr_desc - ARRAY_SIZE(params->e820_table); |
|
|
|
status = alloc_e820ext(nr_e820ext, e820ext, e820ext_size); |
|
if (status != EFI_SUCCESS) |
|
return status; |
|
} |
|
|
|
return EFI_SUCCESS; |
|
} |
|
|
|
struct exit_boot_struct { |
|
struct boot_params *boot_params; |
|
struct efi_info *efi; |
|
}; |
|
|
|
static efi_status_t exit_boot_func(struct efi_boot_memmap *map, |
|
void *priv) |
|
{ |
|
const char *signature; |
|
struct exit_boot_struct *p = priv; |
|
|
|
signature = efi_is_64bit() ? EFI64_LOADER_SIGNATURE |
|
: EFI32_LOADER_SIGNATURE; |
|
memcpy(&p->efi->efi_loader_signature, signature, sizeof(__u32)); |
|
|
|
efi_set_u64_split((unsigned long)efi_system_table, |
|
&p->efi->efi_systab, &p->efi->efi_systab_hi); |
|
p->efi->efi_memdesc_size = *map->desc_size; |
|
p->efi->efi_memdesc_version = *map->desc_ver; |
|
efi_set_u64_split((unsigned long)*map->map, |
|
&p->efi->efi_memmap, &p->efi->efi_memmap_hi); |
|
p->efi->efi_memmap_size = *map->map_size; |
|
|
|
return EFI_SUCCESS; |
|
} |
|
|
|
static efi_status_t exit_boot(struct boot_params *boot_params, void *handle) |
|
{ |
|
unsigned long map_sz, key, desc_size, buff_size; |
|
efi_memory_desc_t *mem_map; |
|
struct setup_data *e820ext = NULL; |
|
__u32 e820ext_size = 0; |
|
efi_status_t status; |
|
__u32 desc_version; |
|
struct efi_boot_memmap map; |
|
struct exit_boot_struct priv; |
|
|
|
map.map = &mem_map; |
|
map.map_size = &map_sz; |
|
map.desc_size = &desc_size; |
|
map.desc_ver = &desc_version; |
|
map.key_ptr = &key; |
|
map.buff_size = &buff_size; |
|
priv.boot_params = boot_params; |
|
priv.efi = &boot_params->efi_info; |
|
|
|
status = allocate_e820(boot_params, &e820ext, &e820ext_size); |
|
if (status != EFI_SUCCESS) |
|
return status; |
|
|
|
/* Might as well exit boot services now */ |
|
status = efi_exit_boot_services(handle, &map, &priv, exit_boot_func); |
|
if (status != EFI_SUCCESS) |
|
return status; |
|
|
|
/* Historic? */ |
|
boot_params->alt_mem_k = 32 * 1024; |
|
|
|
status = setup_e820(boot_params, e820ext, e820ext_size); |
|
if (status != EFI_SUCCESS) |
|
return status; |
|
|
|
return EFI_SUCCESS; |
|
} |
|
|
|
/* |
|
* On success, we return the address of startup_32, which has potentially been |
|
* relocated by efi_relocate_kernel. |
|
* On failure, we exit to the firmware via efi_exit instead of returning. |
|
*/ |
|
unsigned long efi_main(efi_handle_t handle, |
|
efi_system_table_t *sys_table_arg, |
|
struct boot_params *boot_params) |
|
{ |
|
unsigned long bzimage_addr = (unsigned long)startup_32; |
|
unsigned long buffer_start, buffer_end; |
|
struct setup_header *hdr = &boot_params->hdr; |
|
efi_status_t status; |
|
|
|
efi_system_table = sys_table_arg; |
|
|
|
/* Check if we were booted by the EFI firmware */ |
|
if (efi_system_table->hdr.signature != EFI_SYSTEM_TABLE_SIGNATURE) |
|
efi_exit(handle, EFI_INVALID_PARAMETER); |
|
|
|
/* |
|
* If the kernel isn't already loaded at a suitable address, |
|
* relocate it. |
|
* |
|
* It must be loaded above LOAD_PHYSICAL_ADDR. |
|
* |
|
* The maximum address for 64-bit is 1 << 46 for 4-level paging. This |
|
* is defined as the macro MAXMEM, but unfortunately that is not a |
|
* compile-time constant if 5-level paging is configured, so we instead |
|
* define our own macro for use here. |
|
* |
|
* For 32-bit, the maximum address is complicated to figure out, for |
|
* now use KERNEL_IMAGE_SIZE, which will be 512MiB, the same as what |
|
* KASLR uses. |
|
* |
|
* Also relocate it if image_offset is zero, i.e. the kernel wasn't |
|
* loaded by LoadImage, but rather by a bootloader that called the |
|
* handover entry. The reason we must always relocate in this case is |
|
* to handle the case of systemd-boot booting a unified kernel image, |
|
* which is a PE executable that contains the bzImage and an initrd as |
|
* COFF sections. The initrd section is placed after the bzImage |
|
* without ensuring that there are at least init_size bytes available |
|
* for the bzImage, and thus the compressed kernel's startup code may |
|
* overwrite the initrd unless it is moved out of the way. |
|
*/ |
|
|
|
buffer_start = ALIGN(bzimage_addr - image_offset, |
|
hdr->kernel_alignment); |
|
buffer_end = buffer_start + hdr->init_size; |
|
|
|
if ((buffer_start < LOAD_PHYSICAL_ADDR) || |
|
(IS_ENABLED(CONFIG_X86_32) && buffer_end > KERNEL_IMAGE_SIZE) || |
|
(IS_ENABLED(CONFIG_X86_64) && buffer_end > MAXMEM_X86_64_4LEVEL) || |
|
(image_offset == 0)) { |
|
extern char _bss[]; |
|
|
|
status = efi_relocate_kernel(&bzimage_addr, |
|
(unsigned long)_bss - bzimage_addr, |
|
hdr->init_size, |
|
hdr->pref_address, |
|
hdr->kernel_alignment, |
|
LOAD_PHYSICAL_ADDR); |
|
if (status != EFI_SUCCESS) { |
|
efi_err("efi_relocate_kernel() failed!\n"); |
|
goto fail; |
|
} |
|
/* |
|
* Now that we've copied the kernel elsewhere, we no longer |
|
* have a set up block before startup_32(), so reset image_offset |
|
* to zero in case it was set earlier. |
|
*/ |
|
image_offset = 0; |
|
} |
|
|
|
#ifdef CONFIG_CMDLINE_BOOL |
|
status = efi_parse_options(CONFIG_CMDLINE); |
|
if (status != EFI_SUCCESS) { |
|
efi_err("Failed to parse options\n"); |
|
goto fail; |
|
} |
|
#endif |
|
if (!IS_ENABLED(CONFIG_CMDLINE_OVERRIDE)) { |
|
unsigned long cmdline_paddr = ((u64)hdr->cmd_line_ptr | |
|
((u64)boot_params->ext_cmd_line_ptr << 32)); |
|
status = efi_parse_options((char *)cmdline_paddr); |
|
if (status != EFI_SUCCESS) { |
|
efi_err("Failed to parse options\n"); |
|
goto fail; |
|
} |
|
} |
|
|
|
/* |
|
* At this point, an initrd may already have been loaded by the |
|
* bootloader and passed via bootparams. We permit an initrd loaded |
|
* from the LINUX_EFI_INITRD_MEDIA_GUID device path to supersede it. |
|
* |
|
* If the device path is not present, any command-line initrd= |
|
* arguments will be processed only if image is not NULL, which will be |
|
* the case only if we were loaded via the PE entry point. |
|
*/ |
|
if (!efi_noinitrd) { |
|
unsigned long addr, size; |
|
|
|
status = efi_load_initrd(image, &addr, &size, |
|
hdr->initrd_addr_max, ULONG_MAX); |
|
|
|
if (status != EFI_SUCCESS) { |
|
efi_err("Failed to load initrd!\n"); |
|
goto fail; |
|
} |
|
if (size > 0) { |
|
efi_set_u64_split(addr, &hdr->ramdisk_image, |
|
&boot_params->ext_ramdisk_image); |
|
efi_set_u64_split(size, &hdr->ramdisk_size, |
|
&boot_params->ext_ramdisk_size); |
|
} |
|
} |
|
|
|
/* |
|
* If the boot loader gave us a value for secure_boot then we use that, |
|
* otherwise we ask the BIOS. |
|
*/ |
|
if (boot_params->secure_boot == efi_secureboot_mode_unset) |
|
boot_params->secure_boot = efi_get_secureboot(); |
|
|
|
/* Ask the firmware to clear memory on unclean shutdown */ |
|
efi_enable_reset_attack_mitigation(); |
|
|
|
efi_random_get_seed(); |
|
|
|
efi_retrieve_tpm2_eventlog(); |
|
|
|
setup_graphics(boot_params); |
|
|
|
setup_efi_pci(boot_params); |
|
|
|
setup_quirks(boot_params); |
|
|
|
status = exit_boot(boot_params, handle); |
|
if (status != EFI_SUCCESS) { |
|
efi_err("exit_boot() failed!\n"); |
|
goto fail; |
|
} |
|
|
|
return bzimage_addr; |
|
fail: |
|
efi_err("efi_main() failed!\n"); |
|
|
|
efi_exit(handle, status); |
|
}
|
|
|