^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) /* -----------------------------------------------------------------------
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright 2011 Intel Corporation; author Matt Fleming
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * ----------------------------------------------------------------------- */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/efi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/pci.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/stddef.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <asm/efi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <asm/e820/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <asm/setup.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <asm/desc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <asm/boot.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include "efistub.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) /* Maximum physical address for 64-bit kernel with 4-level paging */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #define MAXMEM_X86_64_4LEVEL (1ull << 46)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) const efi_system_table_t *efi_system_table;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) extern u32 image_offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) static efi_loaded_image_t *image = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) static efi_status_t
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) preserve_pci_rom_image(efi_pci_io_protocol_t *pci, struct pci_setup_rom **__rom)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) struct pci_setup_rom *rom = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) efi_status_t status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) unsigned long size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) uint64_t romsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) void *romimage;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) * Some firmware images contain EFI function pointers at the place where
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) * the romimage and romsize fields are supposed to be. Typically the EFI
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) * code is mapped at high addresses, translating to an unrealistically
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) * large romsize. The UEFI spec limits the size of option ROMs to 16
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) * MiB so we reject any ROMs over 16 MiB in size to catch this.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) romimage = efi_table_attr(pci, romimage);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) romsize = efi_table_attr(pci, romsize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) if (!romimage || !romsize || romsize > SZ_16M)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) return EFI_INVALID_PARAMETER;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) size = romsize + sizeof(*rom);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) status = efi_bs_call(allocate_pool, EFI_LOADER_DATA, size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) (void **)&rom);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) if (status != EFI_SUCCESS) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) efi_err("Failed to allocate memory for 'rom'\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) return status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) memset(rom, 0, sizeof(*rom));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) rom->data.type = SETUP_PCI;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) rom->data.len = size - sizeof(struct setup_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) rom->data.next = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) rom->pcilen = pci->romsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) *__rom = rom;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) status = efi_call_proto(pci, pci.read, EfiPciIoWidthUint16,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) PCI_VENDOR_ID, 1, &rom->vendor);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) if (status != EFI_SUCCESS) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) efi_err("Failed to read rom->vendor\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) goto free_struct;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) status = efi_call_proto(pci, pci.read, EfiPciIoWidthUint16,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) PCI_DEVICE_ID, 1, &rom->devid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) if (status != EFI_SUCCESS) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) efi_err("Failed to read rom->devid\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) goto free_struct;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) status = efi_call_proto(pci, get_location, &rom->segment, &rom->bus,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) &rom->device, &rom->function);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) if (status != EFI_SUCCESS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) goto free_struct;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) memcpy(rom->romdata, romimage, romsize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) return status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) free_struct:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) efi_bs_call(free_pool, rom);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) return status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) * There's no way to return an informative status from this function,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) * because any analysis (and printing of error messages) needs to be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) * done directly at the EFI function call-site.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) * For example, EFI_INVALID_PARAMETER could indicate a bug or maybe we
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) * just didn't find any PCI devices, but there's no way to tell outside
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) * the context of the call.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) static void setup_efi_pci(struct boot_params *params)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) efi_status_t status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) void **pci_handle = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) efi_guid_t pci_proto = EFI_PCI_IO_PROTOCOL_GUID;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) unsigned long size = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) struct setup_data *data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) efi_handle_t h;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) status = efi_bs_call(locate_handle, EFI_LOCATE_BY_PROTOCOL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) &pci_proto, NULL, &size, pci_handle);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) if (status == EFI_BUFFER_TOO_SMALL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) status = efi_bs_call(allocate_pool, EFI_LOADER_DATA, size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) (void **)&pci_handle);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) if (status != EFI_SUCCESS) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) efi_err("Failed to allocate memory for 'pci_handle'\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) status = efi_bs_call(locate_handle, EFI_LOCATE_BY_PROTOCOL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) &pci_proto, NULL, &size, pci_handle);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) if (status != EFI_SUCCESS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) goto free_handle;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) data = (struct setup_data *)(unsigned long)params->hdr.setup_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) while (data && data->next)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) data = (struct setup_data *)(unsigned long)data->next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) for_each_efi_handle(h, pci_handle, size, i) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) efi_pci_io_protocol_t *pci = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) struct pci_setup_rom *rom;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) status = efi_bs_call(handle_protocol, h, &pci_proto,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) (void **)&pci);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) if (status != EFI_SUCCESS || !pci)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) status = preserve_pci_rom_image(pci, &rom);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) if (status != EFI_SUCCESS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) if (data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) data->next = (unsigned long)rom;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) params->hdr.setup_data = (unsigned long)rom;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) data = (struct setup_data *)rom;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) free_handle:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) efi_bs_call(free_pool, pci_handle);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) static void retrieve_apple_device_properties(struct boot_params *boot_params)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) efi_guid_t guid = APPLE_PROPERTIES_PROTOCOL_GUID;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) struct setup_data *data, *new;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) efi_status_t status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) u32 size = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) apple_properties_protocol_t *p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) status = efi_bs_call(locate_protocol, &guid, NULL, (void **)&p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) if (status != EFI_SUCCESS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) if (efi_table_attr(p, version) != 0x10000) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) efi_err("Unsupported properties proto version\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) efi_call_proto(p, get_all, NULL, &size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) if (!size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) do {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) status = efi_bs_call(allocate_pool, EFI_LOADER_DATA,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) size + sizeof(struct setup_data),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) (void **)&new);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) if (status != EFI_SUCCESS) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) efi_err("Failed to allocate memory for 'properties'\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) status = efi_call_proto(p, get_all, new->data, &size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) if (status == EFI_BUFFER_TOO_SMALL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) efi_bs_call(free_pool, new);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) } while (status == EFI_BUFFER_TOO_SMALL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) new->type = SETUP_APPLE_PROPERTIES;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) new->len = size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) new->next = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) data = (struct setup_data *)(unsigned long)boot_params->hdr.setup_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) if (!data) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) boot_params->hdr.setup_data = (unsigned long)new;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) while (data->next)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) data = (struct setup_data *)(unsigned long)data->next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) data->next = (unsigned long)new;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) static const efi_char16_t apple[] = L"Apple";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) static void setup_quirks(struct boot_params *boot_params)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) efi_char16_t *fw_vendor = (efi_char16_t *)(unsigned long)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) efi_table_attr(efi_system_table, fw_vendor);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) if (!memcmp(fw_vendor, apple, sizeof(apple))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) if (IS_ENABLED(CONFIG_APPLE_PROPERTIES))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) retrieve_apple_device_properties(boot_params);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) * See if we have Universal Graphics Adapter (UGA) protocol
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) static efi_status_t
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) setup_uga(struct screen_info *si, efi_guid_t *uga_proto, unsigned long size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) efi_status_t status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) u32 width, height;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) void **uga_handle = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) efi_uga_draw_protocol_t *uga = NULL, *first_uga;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) efi_handle_t handle;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) status = efi_bs_call(allocate_pool, EFI_LOADER_DATA, size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) (void **)&uga_handle);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) if (status != EFI_SUCCESS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) return status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) status = efi_bs_call(locate_handle, EFI_LOCATE_BY_PROTOCOL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) uga_proto, NULL, &size, uga_handle);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) if (status != EFI_SUCCESS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) goto free_handle;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) height = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) width = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) first_uga = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) for_each_efi_handle(handle, uga_handle, size, i) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) efi_guid_t pciio_proto = EFI_PCI_IO_PROTOCOL_GUID;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) u32 w, h, depth, refresh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) void *pciio;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) status = efi_bs_call(handle_protocol, handle, uga_proto,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) (void **)&uga);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) if (status != EFI_SUCCESS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) pciio = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) efi_bs_call(handle_protocol, handle, &pciio_proto, &pciio);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) status = efi_call_proto(uga, get_mode, &w, &h, &depth, &refresh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) if (status == EFI_SUCCESS && (!first_uga || pciio)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) width = w;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) height = h;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) * Once we've found a UGA supporting PCIIO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) * don't bother looking any further.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) if (pciio)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) first_uga = uga;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) if (!width && !height)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) goto free_handle;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) /* EFI framebuffer */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) si->orig_video_isVGA = VIDEO_TYPE_EFI;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) si->lfb_depth = 32;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) si->lfb_width = width;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) si->lfb_height = height;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) si->red_size = 8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) si->red_pos = 16;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) si->green_size = 8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) si->green_pos = 8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) si->blue_size = 8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) si->blue_pos = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) si->rsvd_size = 8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) si->rsvd_pos = 24;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) free_handle:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) efi_bs_call(free_pool, uga_handle);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) return status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) static void setup_graphics(struct boot_params *boot_params)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) efi_guid_t graphics_proto = EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) struct screen_info *si;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) efi_guid_t uga_proto = EFI_UGA_PROTOCOL_GUID;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) efi_status_t status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) unsigned long size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) void **gop_handle = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) void **uga_handle = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) si = &boot_params->screen_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) memset(si, 0, sizeof(*si));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) size = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) status = efi_bs_call(locate_handle, EFI_LOCATE_BY_PROTOCOL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) &graphics_proto, NULL, &size, gop_handle);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) if (status == EFI_BUFFER_TOO_SMALL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) status = efi_setup_gop(si, &graphics_proto, size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) if (status != EFI_SUCCESS) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) size = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) status = efi_bs_call(locate_handle, EFI_LOCATE_BY_PROTOCOL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) &uga_proto, NULL, &size, uga_handle);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) if (status == EFI_BUFFER_TOO_SMALL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) setup_uga(si, &uga_proto, size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) static void __noreturn efi_exit(efi_handle_t handle, efi_status_t status)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) efi_bs_call(exit, handle, status, 0, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) for(;;)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) asm("hlt");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) void startup_32(struct boot_params *boot_params);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) void __noreturn efi_stub_entry(efi_handle_t handle,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) efi_system_table_t *sys_table_arg,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) struct boot_params *boot_params);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) * Because the x86 boot code expects to be passed a boot_params we
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) * need to create one ourselves (usually the bootloader would create
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) * one for us).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) efi_status_t __efiapi efi_pe_entry(efi_handle_t handle,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) efi_system_table_t *sys_table_arg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) struct boot_params *boot_params;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) struct setup_header *hdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) void *image_base;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) efi_guid_t proto = LOADED_IMAGE_PROTOCOL_GUID;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) int options_size = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) efi_status_t status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) char *cmdline_ptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) efi_system_table = sys_table_arg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) /* Check if we were booted by the EFI firmware */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) if (efi_system_table->hdr.signature != EFI_SYSTEM_TABLE_SIGNATURE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) efi_exit(handle, EFI_INVALID_PARAMETER);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) status = efi_bs_call(handle_protocol, handle, &proto, (void **)&image);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) if (status != EFI_SUCCESS) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) efi_err("Failed to get handle for LOADED_IMAGE_PROTOCOL\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) efi_exit(handle, status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) image_base = efi_table_attr(image, image_base);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) image_offset = (void *)startup_32 - image_base;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) status = efi_allocate_pages(sizeof(struct boot_params),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) (unsigned long *)&boot_params, ULONG_MAX);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) if (status != EFI_SUCCESS) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) efi_err("Failed to allocate lowmem for boot params\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) efi_exit(handle, status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) memset(boot_params, 0x0, sizeof(struct boot_params));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) hdr = &boot_params->hdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) /* Copy the setup header from the second sector to boot_params */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) memcpy(&hdr->jump, image_base + 512,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) sizeof(struct setup_header) - offsetof(struct setup_header, jump));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) * Fill out some of the header fields ourselves because the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) * EFI firmware loader doesn't load the first sector.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) hdr->root_flags = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) hdr->vid_mode = 0xffff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) hdr->boot_flag = 0xAA55;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) hdr->type_of_loader = 0x21;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) /* Convert unicode cmdline to ascii */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) cmdline_ptr = efi_convert_cmdline(image, &options_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) if (!cmdline_ptr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) efi_set_u64_split((unsigned long)cmdline_ptr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) &hdr->cmd_line_ptr, &boot_params->ext_cmd_line_ptr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) hdr->ramdisk_image = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) hdr->ramdisk_size = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) efi_stub_entry(handle, sys_table_arg, boot_params);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) /* not reached */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) fail:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) efi_free(sizeof(struct boot_params), (unsigned long)boot_params);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) efi_exit(handle, status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) static void add_e820ext(struct boot_params *params,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) struct setup_data *e820ext, u32 nr_entries)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) struct setup_data *data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) e820ext->type = SETUP_E820_EXT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) e820ext->len = nr_entries * sizeof(struct boot_e820_entry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) e820ext->next = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) data = (struct setup_data *)(unsigned long)params->hdr.setup_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) while (data && data->next)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) data = (struct setup_data *)(unsigned long)data->next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) if (data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) data->next = (unsigned long)e820ext;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) params->hdr.setup_data = (unsigned long)e820ext;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) static efi_status_t
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) setup_e820(struct boot_params *params, struct setup_data *e820ext, u32 e820ext_size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) struct boot_e820_entry *entry = params->e820_table;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) struct efi_info *efi = ¶ms->efi_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) struct boot_e820_entry *prev = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) u32 nr_entries;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) u32 nr_desc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) nr_entries = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) nr_desc = efi->efi_memmap_size / efi->efi_memdesc_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) for (i = 0; i < nr_desc; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) efi_memory_desc_t *d;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) unsigned int e820_type = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) unsigned long m = efi->efi_memmap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) #ifdef CONFIG_X86_64
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) m |= (u64)efi->efi_memmap_hi << 32;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) d = efi_early_memdesc_ptr(m, efi->efi_memdesc_size, i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) switch (d->type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) case EFI_RESERVED_TYPE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) case EFI_RUNTIME_SERVICES_CODE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) case EFI_RUNTIME_SERVICES_DATA:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) case EFI_MEMORY_MAPPED_IO:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) case EFI_MEMORY_MAPPED_IO_PORT_SPACE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) case EFI_PAL_CODE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) e820_type = E820_TYPE_RESERVED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) case EFI_UNUSABLE_MEMORY:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) e820_type = E820_TYPE_UNUSABLE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) case EFI_ACPI_RECLAIM_MEMORY:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) e820_type = E820_TYPE_ACPI;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) case EFI_LOADER_CODE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) case EFI_LOADER_DATA:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) case EFI_BOOT_SERVICES_CODE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) case EFI_BOOT_SERVICES_DATA:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) case EFI_CONVENTIONAL_MEMORY:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) if (efi_soft_reserve_enabled() &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) (d->attribute & EFI_MEMORY_SP))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) e820_type = E820_TYPE_SOFT_RESERVED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) e820_type = E820_TYPE_RAM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) case EFI_ACPI_MEMORY_NVS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) e820_type = E820_TYPE_NVS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) case EFI_PERSISTENT_MEMORY:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) e820_type = E820_TYPE_PMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) /* Merge adjacent mappings */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) if (prev && prev->type == e820_type &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) (prev->addr + prev->size) == d->phys_addr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) prev->size += d->num_pages << 12;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) if (nr_entries == ARRAY_SIZE(params->e820_table)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) u32 need = (nr_desc - i) * sizeof(struct e820_entry) +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) sizeof(struct setup_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) if (!e820ext || e820ext_size < need)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) return EFI_BUFFER_TOO_SMALL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) /* boot_params map full, switch to e820 extended */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) entry = (struct boot_e820_entry *)e820ext->data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) entry->addr = d->phys_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) entry->size = d->num_pages << PAGE_SHIFT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) entry->type = e820_type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) prev = entry++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) nr_entries++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) if (nr_entries > ARRAY_SIZE(params->e820_table)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) u32 nr_e820ext = nr_entries - ARRAY_SIZE(params->e820_table);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) add_e820ext(params, e820ext, nr_e820ext);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) nr_entries -= nr_e820ext;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) params->e820_entries = (u8)nr_entries;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) return EFI_SUCCESS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) static efi_status_t alloc_e820ext(u32 nr_desc, struct setup_data **e820ext,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) u32 *e820ext_size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) efi_status_t status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) unsigned long size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) size = sizeof(struct setup_data) +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) sizeof(struct e820_entry) * nr_desc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) if (*e820ext) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) efi_bs_call(free_pool, *e820ext);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) *e820ext = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) *e820ext_size = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) status = efi_bs_call(allocate_pool, EFI_LOADER_DATA, size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) (void **)e820ext);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) if (status == EFI_SUCCESS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) *e820ext_size = size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) return status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) static efi_status_t allocate_e820(struct boot_params *params,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) struct setup_data **e820ext,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) u32 *e820ext_size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) unsigned long map_size, desc_size, map_key;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) efi_status_t status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) __u32 nr_desc, desc_version;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) /* Only need the size of the mem map and size of each mem descriptor */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) map_size = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) status = efi_bs_call(get_memory_map, &map_size, NULL, &map_key,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) &desc_size, &desc_version);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) if (status != EFI_BUFFER_TOO_SMALL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) return (status != EFI_SUCCESS) ? status : EFI_UNSUPPORTED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) nr_desc = map_size / desc_size + EFI_MMAP_NR_SLACK_SLOTS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) if (nr_desc > ARRAY_SIZE(params->e820_table)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) u32 nr_e820ext = nr_desc - ARRAY_SIZE(params->e820_table);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) status = alloc_e820ext(nr_e820ext, e820ext, e820ext_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) if (status != EFI_SUCCESS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) return status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) return EFI_SUCCESS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) struct exit_boot_struct {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) struct boot_params *boot_params;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) struct efi_info *efi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) static efi_status_t exit_boot_func(struct efi_boot_memmap *map,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) void *priv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) const char *signature;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) struct exit_boot_struct *p = priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) signature = efi_is_64bit() ? EFI64_LOADER_SIGNATURE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611) : EFI32_LOADER_SIGNATURE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) memcpy(&p->efi->efi_loader_signature, signature, sizeof(__u32));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) efi_set_u64_split((unsigned long)efi_system_table,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) &p->efi->efi_systab, &p->efi->efi_systab_hi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) p->efi->efi_memdesc_size = *map->desc_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) p->efi->efi_memdesc_version = *map->desc_ver;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) efi_set_u64_split((unsigned long)*map->map,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) &p->efi->efi_memmap, &p->efi->efi_memmap_hi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) p->efi->efi_memmap_size = *map->map_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) return EFI_SUCCESS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625) static efi_status_t exit_boot(struct boot_params *boot_params, void *handle)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) unsigned long map_sz, key, desc_size, buff_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628) efi_memory_desc_t *mem_map;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629) struct setup_data *e820ext = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630) __u32 e820ext_size = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631) efi_status_t status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) __u32 desc_version;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633) struct efi_boot_memmap map;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634) struct exit_boot_struct priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636) map.map = &mem_map;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637) map.map_size = &map_sz;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) map.desc_size = &desc_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) map.desc_ver = &desc_version;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640) map.key_ptr = &key;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641) map.buff_size = &buff_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642) priv.boot_params = boot_params;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643) priv.efi = &boot_params->efi_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) status = allocate_e820(boot_params, &e820ext, &e820ext_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646) if (status != EFI_SUCCESS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647) return status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649) /* Might as well exit boot services now */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650) status = efi_exit_boot_services(handle, &map, &priv, exit_boot_func);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651) if (status != EFI_SUCCESS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) return status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654) /* Historic? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) boot_params->alt_mem_k = 32 * 1024;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657) status = setup_e820(boot_params, e820ext, e820ext_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658) if (status != EFI_SUCCESS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) return status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661) return EFI_SUCCESS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665) * On success, we return the address of startup_32, which has potentially been
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666) * relocated by efi_relocate_kernel.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667) * On failure, we exit to the firmware via efi_exit instead of returning.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669) unsigned long efi_main(efi_handle_t handle,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670) efi_system_table_t *sys_table_arg,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671) struct boot_params *boot_params)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673) unsigned long bzimage_addr = (unsigned long)startup_32;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674) unsigned long buffer_start, buffer_end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675) struct setup_header *hdr = &boot_params->hdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676) efi_status_t status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678) efi_system_table = sys_table_arg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680) /* Check if we were booted by the EFI firmware */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681) if (efi_system_table->hdr.signature != EFI_SYSTEM_TABLE_SIGNATURE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682) efi_exit(handle, EFI_INVALID_PARAMETER);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685) * If the kernel isn't already loaded at a suitable address,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686) * relocate it.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688) * It must be loaded above LOAD_PHYSICAL_ADDR.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690) * The maximum address for 64-bit is 1 << 46 for 4-level paging. This
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691) * is defined as the macro MAXMEM, but unfortunately that is not a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692) * compile-time constant if 5-level paging is configured, so we instead
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693) * define our own macro for use here.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695) * For 32-bit, the maximum address is complicated to figure out, for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696) * now use KERNEL_IMAGE_SIZE, which will be 512MiB, the same as what
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697) * KASLR uses.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699) * Also relocate it if image_offset is zero, i.e. the kernel wasn't
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700) * loaded by LoadImage, but rather by a bootloader that called the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701) * handover entry. The reason we must always relocate in this case is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702) * to handle the case of systemd-boot booting a unified kernel image,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703) * which is a PE executable that contains the bzImage and an initrd as
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704) * COFF sections. The initrd section is placed after the bzImage
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705) * without ensuring that there are at least init_size bytes available
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706) * for the bzImage, and thus the compressed kernel's startup code may
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707) * overwrite the initrd unless it is moved out of the way.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710) buffer_start = ALIGN(bzimage_addr - image_offset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711) hdr->kernel_alignment);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712) buffer_end = buffer_start + hdr->init_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714) if ((buffer_start < LOAD_PHYSICAL_ADDR) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715) (IS_ENABLED(CONFIG_X86_32) && buffer_end > KERNEL_IMAGE_SIZE) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716) (IS_ENABLED(CONFIG_X86_64) && buffer_end > MAXMEM_X86_64_4LEVEL) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717) (image_offset == 0)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 718) status = efi_relocate_kernel(&bzimage_addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 719) hdr->init_size, hdr->init_size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720) hdr->pref_address,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721) hdr->kernel_alignment,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722) LOAD_PHYSICAL_ADDR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 723) if (status != EFI_SUCCESS) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 724) efi_err("efi_relocate_kernel() failed!\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 725) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 726) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 727) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 728) * Now that we've copied the kernel elsewhere, we no longer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 729) * have a set up block before startup_32(), so reset image_offset
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 730) * to zero in case it was set earlier.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 731) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 732) image_offset = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 733) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 734)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 735) #ifdef CONFIG_CMDLINE_BOOL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 736) status = efi_parse_options(CONFIG_CMDLINE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 737) if (status != EFI_SUCCESS) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 738) efi_err("Failed to parse options\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 739) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 740) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 741) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 742) if (!IS_ENABLED(CONFIG_CMDLINE_OVERRIDE)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 743) unsigned long cmdline_paddr = ((u64)hdr->cmd_line_ptr |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 744) ((u64)boot_params->ext_cmd_line_ptr << 32));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 745) status = efi_parse_options((char *)cmdline_paddr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 746) if (status != EFI_SUCCESS) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 747) efi_err("Failed to parse options\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 748) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 749) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 750) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 751)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 752) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 753) * At this point, an initrd may already have been loaded by the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 754) * bootloader and passed via bootparams. We permit an initrd loaded
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 755) * from the LINUX_EFI_INITRD_MEDIA_GUID device path to supersede it.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 756) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 757) * If the device path is not present, any command-line initrd=
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 758) * arguments will be processed only if image is not NULL, which will be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 759) * the case only if we were loaded via the PE entry point.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 760) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 761) if (!efi_noinitrd) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 762) unsigned long addr, size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 763)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 764) status = efi_load_initrd(image, &addr, &size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 765) hdr->initrd_addr_max, ULONG_MAX);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 766)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 767) if (status != EFI_SUCCESS) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 768) efi_err("Failed to load initrd!\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 769) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 770) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 771) if (size > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 772) efi_set_u64_split(addr, &hdr->ramdisk_image,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 773) &boot_params->ext_ramdisk_image);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 774) efi_set_u64_split(size, &hdr->ramdisk_size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 775) &boot_params->ext_ramdisk_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 776) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 777) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 778)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 779) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 780) * If the boot loader gave us a value for secure_boot then we use that,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 781) * otherwise we ask the BIOS.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 782) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 783) if (boot_params->secure_boot == efi_secureboot_mode_unset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 784) boot_params->secure_boot = efi_get_secureboot();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 785)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 786) /* Ask the firmware to clear memory on unclean shutdown */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 787) efi_enable_reset_attack_mitigation();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 788)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 789) efi_random_get_seed();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 790)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 791) efi_retrieve_tpm2_eventlog();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 792)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 793) setup_graphics(boot_params);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 794)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 795) setup_efi_pci(boot_params);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 796)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 797) setup_quirks(boot_params);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 798)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 799) status = exit_boot(boot_params, handle);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 800) if (status != EFI_SUCCESS) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 801) efi_err("exit_boot() failed!\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 802) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 803) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 804)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 805) return bzimage_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 806) fail:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 807) efi_err("efi_main() failed!\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 808)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 809) efi_exit(handle, status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 810) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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