/* * Copyright (C) 2001-2003 Hewlett-Packard Co. * Contributed by Stephane Eranian * Contributed by Mike Johnston * Contributed by Chris Ahna * Contributed by Fenghua Yu * Contributed by Bibo Mao * Contributed by chandramouli narayanan * Edgar Hucek * * Updated with code to fill bootparam converting EFI memory map to E820 * based on a Linux kernel patch provided by Edgar Hucek * - mouli 06/20/2007 * * This file is part of the ELILO, the EFI Linux boot loader. * * ELILO is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2, or (at your option) * any later version. * * ELILO is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with ELILO; see the file COPYING. If not, write to the Free * Software Foundation, 59 Temple Place - Suite 330, Boston, MA * 02111-1307, USA. * * Please check out the elilo.txt for complete documentation on how * to use this program. */ /* * This file contains all the x86_64 specific code expected by generic loader */ #include #include #include "elilo.h" #include "loader.h" #include "rmswitch.h" extern loader_ops_t bzimage_loader, plain_loader, gzip_loader; /* * Descriptor table base addresses & limits for Linux startup. */ dt_addr_t gdt_addr = { 0x800, 0x94000 }; dt_addr_t idt_addr = { 0, 0 }; /* * Initial GDT layout for Linux startup. */ UINT16 init_gdt[] = { /* gdt[0]: dummy */ 0, 0, 0, 0, /* gdt[1]: unused */ 0, 0, 0, 0, /* gdt[2]: code */ 0xFFFF, /* 4Gb - (0x100000*0x1000 = 4Gb) */ 0x0000, /* base address=0 */ 0x9A00, /* code read/exec */ 0x00CF, /* granularity=4096, 386 (+5th nibble of limit) */ /* gdt[3]: data */ 0xFFFF, /* 4Gb - (0x100000*0x1000 = 4Gb) */ 0x0000, /* base address=0 */ 0x9200, /* data read/write */ 0x00CF, /* granularity=4096, 386 (+5th nibble of limit) */ }; UINTN sizeof_init_gdt = sizeof init_gdt; /* * Highest available base memory address. * * For traditional kernels and loaders this is always at 0x90000. * For updated kernels and loaders this is computed by taking the * highest available base memory address and rounding down to the * nearest 64 kB boundary and then subtracting 64 kB. * * A non-compressed kernel is automatically assumed to be an updated * kernel. A compressed kernel that has bit 6 (0x40) set in the * loader_flags field is also assumed to be an updated kernel. */ UINTN high_base_mem = 0x90000; /* * Highest available extended memory address. * * This is computed by taking the highest available extended memory * address and rounding down to the nearest EFI_PAGE_SIZE (usually * 4 kB) boundary. * This is only used for backward compatibility. */ UINTN high_ext_mem = 32 * 1024 * 1024; /* This starting address will hold true for all of the loader types for now */ VOID *kernel_start = (VOID *)0x100000; /* 1M */ VOID *initrd_start = NULL; UINTN initrd_size = 0; INTN sysdeps_init(EFI_HANDLE dev) { DBG_PRT((L"sysdeps_init()\n")); /* * Register our loader(s)... */ loader_register(&bzimage_loader); loader_register(&plain_loader); loader_register(&gzip_loader); return 0; } /* * initrd_get_addr() * Compute a starting address for the initial RAMdisk image. * For now, this image is placed immediately after the end of * the kernel memory. Inside the start_kernel() code, the * RAMdisk image will be relocated to the top of available * extended memory. */ INTN sysdeps_initrd_get_addr(kdesc_t *kd, memdesc_t *imem) { DBG_PRT((L"initrd_get_addr()\n")); if (!kd || !imem) { ERR_PRT((L"kd=0x%x imem=0x%x", kd, imem)); return -1; } VERB_PRT(3, Print(L"kstart=0x%x kentry=0x%x kend=0x%x\n", kd->kstart, kd->kentry, kd->kend)); imem->start_addr = kd->kend; VERB_PRT(3, Print(L"initrd start_addr=0x%x pgcnt=%d\n", imem->start_addr, imem->pgcnt)); return 0; } VOID sysdeps_free_boot_params(boot_params_t *bp) { mmap_desc_t md; ZeroMem(&md, sizeof md); md.md = (VOID *)bp->s.efi_mem_map; free_memmap(&md); } static VOID find_bits(unsigned long mask, UINT8 *first, UINT8* len) { unsigned char bit_pos = 0, bit_len = 0; *first =0; *len = 0; if (mask == 0) return; while (!(mask & 0x1)) { mask = mask >> 1; bit_pos++; } while (mask & 0x1) { mask = mask >> 1; bit_len++; } *first = bit_pos; *len = bit_len; } /* * Get video information. */ static INTN get_video_info(boot_params_t * bp) { EFI_GUID GopProtocol = EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID; EFI_GRAPHICS_OUTPUT_PROTOCOL *Gop_interface; EFI_GRAPHICS_OUTPUT_MODE_INFORMATION *Gop_info; EFI_GRAPHICS_OUTPUT_PROTOCOL_MODE *Gop_mode; EFI_HANDLE *Gop_handle; EFI_STATUS efi_status; UINTN size, size1; UINT8 i; efi_status = uefi_call_wrapper( BS->LocateHandle, 5, ByProtocol, &GopProtocol, NULL, &size, (VOID **)Gop_handle); if (EFI_ERROR(efi_status) && efi_status != EFI_BUFFER_TOO_SMALL) { ERR_PRT((L"LocateHandle GopProtocol failed.")); return -1; } Gop_handle = alloc(size, 0); efi_status = uefi_call_wrapper( BS->LocateHandle, 5, ByProtocol, &GopProtocol, NULL, &size, (VOID **)Gop_handle); if (EFI_ERROR(efi_status)) { ERR_PRT((L"LocateHandle GopProtocol failed.")); free(Gop_handle); return -1; } for (i=0; i < size/sizeof(EFI_HANDLE); i++) { Gop_handle += i; efi_status = uefi_call_wrapper( BS->HandleProtocol, 3, *Gop_handle, &GopProtocol, &Gop_interface); if (EFI_ERROR(efi_status)) { continue; } Gop_mode = Gop_interface->Mode; efi_status = uefi_call_wrapper( Gop_interface->QueryMode, 4, Gop_interface, Gop_mode->Mode, &size1, &Gop_info); if (!EFI_ERROR(efi_status)) break; if (EFI_ERROR(efi_status)) { continue; } } if (EFI_ERROR(efi_status) || i > (size/sizeof(EFI_HANDLE))) { ERR_PRT((L"HandleProtocol GopProtocol failed.")); free(Gop_handle); return -1; } bp->s.is_vga = 0x24; bp->s.orig_cursor_col = 0; bp->s.orig_cursor_row = 0; bp->s.orig_video_page = 0; bp->s.orig_video_mode = 0; bp->s.orig_video_cols = 0; bp->s.orig_video_rows = 0; bp->s.orig_ega_bx = 0; bp->s.orig_video_points = 0; bp->s.lfb_width = Gop_info->HorizontalResolution; bp->s.lfb_height = Gop_info->VerticalResolution; bp->s.lfb_base = Gop_mode->FrameBufferBase; bp->s.lfb_size = Gop_mode->FrameBufferSize; bp->s.lfb_pages = 1; bp->s.vesa_seg = 0; bp->s.vesa_off = 0; if (Gop_info->PixelFormat == PixelRedGreenBlueReserved8BitPerColor) { bp->s.lfb_depth = 32; bp->s.lfb_red_size = 8; bp->s.lfb_red_pos = 0; bp->s.lfb_green_size = 8; bp->s.lfb_green_pos = 8; bp->s.lfb_blue_size = 8; bp->s.lfb_blue_pos = 16; bp->s.lfb_rsvd_size = 8; bp->s.lfb_rsvd_pos = 24; bp->s.lfb_line_len = Gop_info->PixelsPerScanLine * 4; } else if (Gop_info->PixelFormat == PixelBlueGreenRedReserved8BitPerColor) { bp->s.lfb_depth = 32; bp->s.lfb_red_size = 8; bp->s.lfb_red_pos = 16; bp->s.lfb_green_size = 8; bp->s.lfb_green_pos = 8; bp->s.lfb_blue_size = 8; bp->s.lfb_blue_pos = 0; bp->s.lfb_rsvd_size = 8; bp->s.lfb_rsvd_pos = 24; bp->s.lfb_line_len = Gop_info->PixelsPerScanLine * 4; } else if (Gop_info->PixelFormat == PixelBitMask) { find_bits(Gop_info->PixelInformation.RedMask, &bp->s.lfb_red_pos, &bp->s.lfb_red_size); find_bits(Gop_info->PixelInformation.GreenMask, &bp->s.lfb_green_pos, &bp->s.lfb_green_size); find_bits(Gop_info->PixelInformation.BlueMask, &bp->s.lfb_blue_pos, &bp->s.lfb_blue_size); find_bits(Gop_info->PixelInformation.ReservedMask, &bp->s.lfb_rsvd_pos, &bp->s.lfb_rsvd_size); bp->s.lfb_depth = bp->s.lfb_red_size + bp->s.lfb_green_size + bp->s.lfb_blue_size + bp->s.lfb_rsvd_size; bp->s.lfb_line_len = (Gop_info->PixelsPerScanLine * bp->s.lfb_depth) / 8; } else { bp->s.lfb_depth = 4; bp->s.lfb_red_size = 0; bp->s.lfb_red_pos = 0; bp->s.lfb_green_size = 0; bp->s.lfb_green_pos = 0; bp->s.lfb_blue_size = 0; bp->s.lfb_blue_pos = 0; bp->s.lfb_rsvd_size = 0; bp->s.lfb_rsvd_pos = 0; bp->s.lfb_line_len = bp->s.lfb_width / 2; } return 0; } /* Convert EFI memory map to E820 map for the operating system * This code is based on a Linux kernel patch submitted by Edgar Hucek */ void fill_e820map(boot_params_t *bp, mmap_desc_t *mdesc) { int nr_map, i; UINT64 start, end, size; EFI_MEMORY_DESCRIPTOR *md, *p; struct e820entry *e820_map; nr_map = mdesc->map_size/mdesc->desc_size; e820_map = (struct e820entry *)bp->s.e820_map; bp->s.e820_nrmap = nr_map; for (i = 0, p = mdesc->md; i < nr_map; i++) { md = p; switch (md->Type) { case EfiACPIReclaimMemory: e820_map->addr = md->PhysicalStart; e820_map->size = md->NumberOfPages << EFI_PAGE_SHIFT; e820_map->type = E820_ACPI; break; case EfiRuntimeServicesCode: e820_map->addr = md->PhysicalStart; e820_map->size = md->NumberOfPages << EFI_PAGE_SHIFT; e820_map->type = E820_EXEC_CODE; break; case EfiRuntimeServicesData: case EfiReservedMemoryType: case EfiMemoryMappedIO: case EfiMemoryMappedIOPortSpace: case EfiUnusableMemory: case EfiPalCode: e820_map->addr = md->PhysicalStart; e820_map->size = md->NumberOfPages << EFI_PAGE_SHIFT; e820_map->type = E820_RESERVED; break; case EfiLoaderCode: case EfiLoaderData: case EfiBootServicesCode: case EfiBootServicesData: case EfiConventionalMemory: start = md->PhysicalStart; size = md->NumberOfPages << EFI_PAGE_SHIFT; end = start + size; /* Fix up for BIOS that claims RAM in 640K-1MB region */ if (start < 0x100000ULL && end > 0xA0000ULL) { if (start < 0xA0000ULL) { /* start < 640K * set memory map from start to 640K */ e820_map->addr = start; e820_map->size = 0xA0000ULL-start; e820_map->type = E820_RAM; e820_map++; } if (end <= 0x100000ULL) continue; /* end > 1MB * set memory map avoiding 640K to 1MB hole */ start = 0x100000ULL; size = end - start; } e820_map->addr = start; e820_map->size = size; e820_map->type = E820_RAM; break; case EfiACPIMemoryNVS: e820_map->addr = md->PhysicalStart; e820_map->size = md->NumberOfPages << EFI_PAGE_SHIFT; e820_map->type = E820_NVS; break; default: /* We should not hit this case */ e820_map->addr = md->PhysicalStart; size = md->NumberOfPages << EFI_PAGE_SHIFT; e820_map->type = E820_RESERVED; break; } e820_map++; p = NextMemoryDescriptor(p, mdesc->desc_size); } } /* * x86_64 specific boot parameters initialization routine */ INTN sysdeps_create_boot_params( boot_params_t *bp, CHAR8 *cmdline, memdesc_t *initrd, memdesc_t *vmcode, UINTN *cookie) { mmap_desc_t mdesc; EFI_STATUS efi_status; UINTN rows, cols; UINT8 row, col; UINT8 mode; UINT16 hdr_version; DBG_PRT((L"fill_boot_params()\n")); if (!bp || !cmdline || !initrd || !cookie) { ERR_PRT((L"bp=0x%x cmdline=0x%x initrd=0x%x cookie=0x%x", bp, cmdline, initrd, cookie)); if (param_start != NULL) { free(param_start); param_start = NULL; param_size = 0; } free_kmem(); return -1; } /* * Copy temporary boot sector and setup data storage to * elilo allocated boot parameter storage. We only need * the first two sectors (1K). The rest of the storage * can be used by the command line. */ if (param_start != NULL) { CopyMem(bp, param_start, 0x2000); free(param_start); param_start = NULL; param_size = 0; } /* * Save off our header revision information. */ hdr_version = (bp->s.hdr_major << 8) | bp->s.hdr_minor; /* * Clear out unused memory in boot sector image. */ bp->s.unused_1 = 0; bp->s.unused_2 = 0; ZeroMem(bp->s.unused_3, sizeof bp->s.unused_3); ZeroMem(bp->s.unused_4, sizeof bp->s.unused_4); ZeroMem(bp->s.unused_51, sizeof bp->s.unused_51); ZeroMem(bp->s.unused_52, sizeof bp->s.unused_52); bp->s.unused_6 = 0; bp->s.unused_7 = 0; ZeroMem(bp->s.unused_8, sizeof bp->s.unused_8); /* * Tell kernel this was loaded by an advanced loader type. * If this field is zero, the initrd_start and initrd_size * fields are ignored by the kernel. */ bp->s.loader_type = LDRTYPE_ELILO; /* * Setup command line information. */ bp->s.cmdline_magik = CMDLINE_MAGIK; bp->s.cmdline_offset = (UINT8 *)cmdline - (UINT8 *)bp; /* * Clear out the cmdline_addr field so the kernel can find * the cmdline. */ bp->s.cmdline_addr = 0x0; /* * Setup hard drive parameters. * %%TBD - It should be okay to zero fill the hard drive * info buffers. The kernel should do its own detection. */ ZeroMem(bp->s.hd0_info, sizeof bp->s.hd0_info); ZeroMem(bp->s.hd1_info, sizeof bp->s.hd1_info); /* * Memory info. */ bp->s.alt_mem_k = high_ext_mem / 1024; if (bp->s.alt_mem_k <= 65535) bp->s.ext_mem_k = (UINT16)bp->s.alt_mem_k; else bp->s.ext_mem_k = 65535; /* * Initial RAMdisk and root device stuff. */ DBG_PRT((L"initrd->start_addr=0x%x initrd->pgcnt=%d\n", initrd->start_addr, initrd->pgcnt)); /* These RAMdisk flags are not needed, just zero them. */ bp->s.ramdisk_flags = 0; if (initrd->start_addr && initrd->pgcnt) { /* %%TBD - This will probably have to be changed. */ bp->s.initrd_start = (UINT32)initrd->start_addr; bp->s.initrd_size = (UINT32)(initrd->size); /* * This is the RAMdisk root device for RedHat 2.2.x * kernels (major 0x01, minor 0x00). */ bp->s.orig_root_dev = 0x0100; } else { bp->s.initrd_start = 0; bp->s.initrd_size = 0; } /* * APM BIOS info. */ bp->s.apm_bios_ver = NO_APM_BIOS; bp->s.bios_code_seg = 0; bp->s.bios_entry_point = 0; bp->s.bios_code_seg16 = 0; bp->s.bios_data_seg = 0; bp->s.apm_bios_flags = 0; bp->s.bios_code_len = 0; bp->s.bios_data_len = 0; /* * MCA BIOS info (misnomer). */ bp->s.mca_info_len = 0; ZeroMem(bp->s.mca_info_buf, sizeof bp->s.mca_info_buf); /* * Pointing device presence. The kernel will detect this. */ bp->s.aux_dev_info = NO_MOUSE; /* * EFI loader signature */ CopyMem(bp->s.efi_loader_sig, EFI_LOADER_SIG, 4); /* * Kernel entry point. */ bp->s.kernel_start = (UINT32)kernel_start; /* * When changing stuff in the parameter structure compare * the offsets of the fields with the offsets used in the * boot sector and setup source files. * arch/x86_64/boot/bootsect.S * arch/x86_64/boot/setup.S * arch/x86_64/kernel/setup.c * include/asm-x86_64/setup.h (2.5/2.6) */ #define CHECK_OFFSET(n, o, f) \ { \ UINTN p = (UINT8 *)&bp->s.n - (UINT8 *)bp; \ UINTN q = (UINTN)(o); \ if (p != q) { \ test |= 1; \ Print(L"%20a: %3xh %3xh ", #n, p, q); \ if (*f) { \ Print(f, bp->s.n); \ } \ Print(L"\n"); \ } \ } #define WAIT_FOR_KEY() \ { \ EFI_INPUT_KEY key; \ while (uefi_call_wrapper(ST->ConIn->ReadKeyStroke, 2, ST->ConIn, &key) != EFI_SUCCESS) { \ ; \ } \ } { UINTN test = 0; CHECK_OFFSET(orig_cursor_col, 0x00, L"%xh"); CHECK_OFFSET(orig_cursor_row, 0x01, L"%xh"); CHECK_OFFSET(ext_mem_k, 0x02, L"%xh"); CHECK_OFFSET(orig_video_page, 0x04, L"%xh"); CHECK_OFFSET(orig_video_mode, 0x06, L"%xh"); CHECK_OFFSET(orig_video_cols, 0x07, L"%xh"); CHECK_OFFSET(orig_ega_bx, 0x0A, L"%xh"); CHECK_OFFSET(orig_video_rows, 0x0E, L"%xh"); CHECK_OFFSET(is_vga, 0x0F, L"%xh"); CHECK_OFFSET(orig_video_points, 0x10, L"%xh"); CHECK_OFFSET(lfb_width, 0x12, L"%xh"); CHECK_OFFSET(lfb_height, 0x14, L"%xh"); CHECK_OFFSET(lfb_depth, 0x16, L"%xh"); CHECK_OFFSET(lfb_base, 0x18, L"%xh"); CHECK_OFFSET(lfb_size, 0x1C, L"%xh"); CHECK_OFFSET(cmdline_magik, 0x20, L"%xh"); CHECK_OFFSET(cmdline_offset, 0x22, L"%xh"); CHECK_OFFSET(lfb_line_len, 0x24, L"%xh"); CHECK_OFFSET(lfb_red_size, 0x26, L"%xh"); CHECK_OFFSET(lfb_red_pos, 0x27, L"%xh"); CHECK_OFFSET(lfb_green_size, 0x28, L"%xh"); CHECK_OFFSET(lfb_green_pos, 0x29, L"%xh"); CHECK_OFFSET(lfb_blue_size, 0x2A, L"%xh"); CHECK_OFFSET(lfb_blue_pos, 0x2B, L"%xh"); CHECK_OFFSET(lfb_rsvd_size, 0x2C, L"%xh"); CHECK_OFFSET(lfb_rsvd_pos, 0x2D, L"%xh"); CHECK_OFFSET(vesa_seg, 0x2E, L"%xh"); CHECK_OFFSET(vesa_off, 0x30, L"%xh"); CHECK_OFFSET(lfb_pages, 0x32, L"%xh"); CHECK_OFFSET(lfb_reserved, 0x34, L""); CHECK_OFFSET(apm_bios_ver, 0x40, L"%xh"); CHECK_OFFSET(bios_code_seg, 0x42, L"%xh"); CHECK_OFFSET(bios_entry_point, 0x44, L"%xh"); CHECK_OFFSET(bios_code_seg16, 0x48, L"%xh"); CHECK_OFFSET(bios_data_seg, 0x4A, L"%xh"); CHECK_OFFSET(apm_bios_flags, 0x4C, L"%xh"); CHECK_OFFSET(bios_code_len, 0x4E, L"%xh"); CHECK_OFFSET(bios_data_len, 0x52, L"%xh"); CHECK_OFFSET(hd0_info, 0x80, L""); CHECK_OFFSET(hd1_info, 0x90, L""); CHECK_OFFSET(mca_info_len, 0xA0, L"%xh"); CHECK_OFFSET(mca_info_buf, 0xA2, L""); CHECK_OFFSET(efi_sys_tbl, 0x1B8, L"%xh"); CHECK_OFFSET(efi_loader_sig, 0x1C0, L"'%-4.4a'"); CHECK_OFFSET(efi_mem_desc_size, 0x1C4, L"%xh"); CHECK_OFFSET(efi_mem_desc_ver, 0x1C8, L"%xh"); CHECK_OFFSET(efi_mem_map_size, 0x1CC, L"%xh"); CHECK_OFFSET(efi_mem_map, 0x1D0, L"%xh"); CHECK_OFFSET(loader_start, 0x1D8, L"%xh"); CHECK_OFFSET(loader_size, 0x1DC, L"%xh"); CHECK_OFFSET(alt_mem_k, 0x1E0, L"%xh"); CHECK_OFFSET(setup_sectors, 0x1F1, L"%xh"); CHECK_OFFSET(mount_root_rdonly, 0x1F2, L"%xh"); CHECK_OFFSET(sys_size, 0x1F4, L"%xh"); CHECK_OFFSET(swap_dev, 0x1F6, L"%xh"); CHECK_OFFSET(ramdisk_flags, 0x1F8, L"%xh"); CHECK_OFFSET(video_mode_flag, 0x1FA, L"%xh"); CHECK_OFFSET(orig_root_dev, 0x1FC, L"%xh"); CHECK_OFFSET(aux_dev_info, 0x1FF, L"%xh"); CHECK_OFFSET(jump, 0x200, L"%xh"); CHECK_OFFSET(setup_sig, 0x202, L"'%-4.4a'"); CHECK_OFFSET(hdr_minor, 0x206, L"%xh"); CHECK_OFFSET(hdr_major, 0x207, L"%xh"); CHECK_OFFSET(rm_switch, 0x208, L"%xh"); CHECK_OFFSET(start_sys_seg, 0x20C, L"%xh"); CHECK_OFFSET(kernel_verstr_offset, 0x20E, L"%xh"); CHECK_OFFSET(loader_type, 0x210, L"%xh"); CHECK_OFFSET(loader_flags, 0x211, L"%xh"); CHECK_OFFSET(setup_move_size, 0x212, L"%xh"); CHECK_OFFSET(kernel_start, 0x214, L"%xh"); CHECK_OFFSET(initrd_start, 0x218, L"%xh"); CHECK_OFFSET(initrd_size, 0x21C, L"%xh"); CHECK_OFFSET(bootsect_helper, 0x220, L"%xh"); CHECK_OFFSET(heap_end_ptr, 0x224, L"%xh"); CHECK_OFFSET(cmdline_addr, 0x228, L"%xh"); if (test) { ERR_PRT((L"Boot sector and/or setup parameter alignment error.")); free_kmem(); return -1; } } /* * Get video information. * Do this last so that any other cursor positioning done * in the fill routine gets accounted for. */ if (!get_video_info(bp)) goto do_memmap; /* Do the old text mode */ efi_status = uefi_call_wrapper( ST->ConOut->QueryMode, 4, ST->ConOut, ST->ConOut->Mode->Mode, &cols, &rows); if (EFI_ERROR(efi_status)) { ERR_PRT((L"QueryMode failed. Fake it.")); mode = 3; rows = 25; cols = 80; row = 24; col = 0; } else { mode = (UINT8)ST->ConOut->Mode->Mode; col = (UINT8)ST->ConOut->Mode->CursorColumn; row = (UINT8)ST->ConOut->Mode->CursorRow; } bp->s.orig_cursor_col = col; bp->s.orig_cursor_row = row; bp->s.orig_video_page = 0; bp->s.orig_video_mode = mode; bp->s.orig_video_cols = (UINT8)cols; bp->s.orig_video_rows = (UINT8)rows; bp->s.orig_ega_bx = 0; bp->s.is_vga = 0; bp->s.orig_video_points = 16; bp->s.lfb_width = 0; bp->s.lfb_height = 0; bp->s.lfb_depth = 0; bp->s.lfb_base = 0; bp->s.lfb_size = 0; bp->s.lfb_line_len = 0; bp->s.lfb_red_size = 0; bp->s.lfb_red_pos = 0; bp->s.lfb_green_size = 0; bp->s.lfb_green_pos = 0; bp->s.lfb_blue_size = 0; bp->s.lfb_blue_pos = 0; bp->s.lfb_rsvd_size = 0; bp->s.lfb_rsvd_pos = 0; bp->s.lfb_pages = 0; bp->s.vesa_seg = 0; bp->s.vesa_off = 0; do_memmap: /* * Get memory map description and cookie for ExitBootServices() */ if (get_memmap(&mdesc)) { ERR_PRT((L"Could not get memory map.")); free_kmem(); return -1; } *cookie = mdesc.cookie; bp->s.efi_mem_map = (UINTN)mdesc.md; bp->s.efi_mem_map_size = mdesc.map_size; bp->s.efi_mem_desc_size = mdesc.desc_size; bp->s.efi_mem_desc_ver = mdesc.desc_version; bp->s.efi_sys_tbl = (UINTN)systab; /* Now that we have EFI memory map, convert it to E820 map * and update the bootparam accordingly */ fill_e820map(bp, &mdesc); return 0; }