#include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include noreturn void linux_spinup(void *entry, void *boot_params); // The following definitions and struct were copied and adapted from Linux // kernel headers released under GPL-2.0 WITH Linux-syscall-note // allowing their inclusion in non GPL compliant code. #define EDD_MBR_SIG_MAX 16 #define E820_MAX_ENTRIES_ZEROPAGE 128 #define EDDMAXNR 6 struct setup_header { uint8_t setup_sects; uint16_t root_flags; uint32_t syssize; uint16_t ram_size; uint16_t vid_mode; uint16_t root_dev; uint16_t boot_flag; uint16_t jump; uint32_t header; uint16_t version; uint32_t realmode_swtch; uint16_t start_sys_seg; uint16_t kernel_version; uint8_t type_of_loader; uint8_t loadflags; uint16_t setup_move_size; uint32_t code32_start; uint32_t ramdisk_image; uint32_t ramdisk_size; uint32_t bootsect_kludge; uint16_t heap_end_ptr; uint8_t ext_loader_ver; uint8_t ext_loader_type; uint32_t cmd_line_ptr; uint32_t initrd_addr_max; uint32_t kernel_alignment; uint8_t relocatable_kernel; uint8_t min_alignment; uint16_t xloadflags; uint32_t cmdline_size; uint32_t hardware_subarch; uint64_t hardware_subarch_data; uint32_t payload_offset; uint32_t payload_length; uint64_t setup_data; uint64_t pref_address; uint32_t init_size; uint32_t handover_offset; uint32_t kernel_info_offset; } __attribute__((packed)); struct screen_info { uint8_t orig_x; /* 0x00 */ uint8_t orig_y; /* 0x01 */ uint16_t ext_mem_k; /* 0x02 */ uint16_t orig_video_page; /* 0x04 */ uint8_t orig_video_mode; /* 0x06 */ uint8_t orig_video_cols; /* 0x07 */ uint8_t flags; /* 0x08 */ uint8_t unused2; /* 0x09 */ uint16_t orig_video_ega_bx;/* 0x0a */ uint16_t unused3; /* 0x0c */ uint8_t orig_video_lines; /* 0x0e */ uint8_t orig_video_isVGA; /* 0x0f */ uint16_t orig_video_points;/* 0x10 */ /* VESA graphic mode -- linear frame buffer */ uint16_t lfb_width; /* 0x12 */ uint16_t lfb_height; /* 0x14 */ uint16_t lfb_depth; /* 0x16 */ uint32_t lfb_base; /* 0x18 */ uint32_t lfb_size; /* 0x1c */ uint16_t cl_magic, cl_offset; /* 0x20 */ uint16_t lfb_linelength; /* 0x24 */ uint8_t red_size; /* 0x26 */ uint8_t red_pos; /* 0x27 */ uint8_t green_size; /* 0x28 */ uint8_t green_pos; /* 0x29 */ uint8_t blue_size; /* 0x2a */ uint8_t blue_pos; /* 0x2b */ uint8_t rsvd_size; /* 0x2c */ uint8_t rsvd_pos; /* 0x2d */ uint16_t vesapm_seg; /* 0x2e */ uint16_t vesapm_off; /* 0x30 */ uint16_t pages; /* 0x32 */ uint16_t vesa_attributes; /* 0x34 */ uint32_t capabilities; /* 0x36 */ uint32_t ext_lfb_base; /* 0x3a */ uint8_t _reserved[2]; /* 0x3e */ } __attribute__((packed)); #define VIDEO_TYPE_MDA 0x10 /* Monochrome Text Display */ #define VIDEO_TYPE_CGA 0x11 /* CGA Display */ #define VIDEO_TYPE_EGAM 0x20 /* EGA/VGA in Monochrome Mode */ #define VIDEO_TYPE_EGAC 0x21 /* EGA in Color Mode */ #define VIDEO_TYPE_VGAC 0x22 /* VGA+ in Color Mode */ #define VIDEO_TYPE_VLFB 0x23 /* VESA VGA in graphic mode */ #define VIDEO_TYPE_PICA_S3 0x30 /* ACER PICA-61 local S3 video */ #define VIDEO_TYPE_MIPS_G364 0x31 /* MIPS Magnum 4000 G364 video */ #define VIDEO_TYPE_SGI 0x33 /* Various SGI graphics hardware */ #define VIDEO_TYPE_TGAC 0x40 /* DEC TGA */ #define VIDEO_TYPE_SUN 0x50 /* Sun frame buffer. */ #define VIDEO_TYPE_SUNPCI 0x51 /* Sun PCI based frame buffer. */ #define VIDEO_TYPE_PMAC 0x60 /* PowerMacintosh frame buffer. */ #define VIDEO_TYPE_EFI 0x70 /* EFI graphic mode */ #define VIDEO_FLAGS_NOCURSOR (1 << 0) /* The video mode has no cursor set */ #define VIDEO_CAPABILITY_SKIP_QUIRKS (1 << 0) #define VIDEO_CAPABILITY_64BIT_BASE (1 << 1) /* Frame buffer base is 64-bit */ struct apm_bios_info { uint16_t version; uint16_t cseg; uint32_t offset; uint16_t cseg_16; uint16_t dseg; uint16_t flags; uint16_t cseg_len; uint16_t cseg_16_len; uint16_t dseg_len; }; struct ist_info { uint32_t signature; uint32_t command; uint32_t event; uint32_t perf_level; }; struct sys_desc_table { uint16_t length; uint8_t table[14]; }; struct olpc_ofw_header { uint32_t ofw_magic; /* OFW signature */ uint32_t ofw_version; uint32_t cif_handler; /* callback into OFW */ uint32_t irq_desc_table; } __attribute__((packed)); struct edid_info { unsigned char dummy[128]; }; struct efi_info { uint32_t efi_loader_signature; uint32_t efi_systab; uint32_t efi_memdesc_size; uint32_t efi_memdesc_version; uint32_t efi_memmap; uint32_t efi_memmap_size; uint32_t efi_systab_hi; uint32_t efi_memmap_hi; }; struct boot_e820_entry { uint64_t addr; uint64_t size; uint32_t type; } __attribute__((packed)); struct edd_device_params { uint16_t length; uint16_t info_flags; uint32_t num_default_cylinders; uint32_t num_default_heads; uint32_t sectors_per_track; uint64_t number_of_sectors; uint16_t bytes_per_sector; uint32_t dpte_ptr; /* 0xFFFFFFFF for our purposes */ uint16_t key; /* = 0xBEDD */ uint8_t device_path_info_length; /* = 44 */ uint8_t reserved2; uint16_t reserved3; uint8_t host_bus_type[4]; uint8_t interface_type[8]; union { struct { uint16_t base_address; uint16_t reserved1; uint32_t reserved2; } __attribute__ ((packed)) isa; struct { uint8_t bus; uint8_t slot; uint8_t function; uint8_t channel; uint32_t reserved; } __attribute__ ((packed)) pci; /* pcix is same as pci */ struct { uint64_t reserved; } __attribute__ ((packed)) ibnd; struct { uint64_t reserved; } __attribute__ ((packed)) xprs; struct { uint64_t reserved; } __attribute__ ((packed)) htpt; struct { uint64_t reserved; } __attribute__ ((packed)) unknown; } interface_path; union { struct { uint8_t device; uint8_t reserved1; uint16_t reserved2; uint32_t reserved3; uint64_t reserved4; } __attribute__ ((packed)) ata; struct { uint8_t device; uint8_t lun; uint8_t reserved1; uint8_t reserved2; uint32_t reserved3; uint64_t reserved4; } __attribute__ ((packed)) atapi; struct { uint16_t id; uint64_t lun; uint16_t reserved1; uint32_t reserved2; } __attribute__ ((packed)) scsi; struct { uint64_t serial_number; uint64_t reserved; } __attribute__ ((packed)) usb; struct { uint64_t eui; uint64_t reserved; } __attribute__ ((packed)) i1394; struct { uint64_t wwid; uint64_t lun; } __attribute__ ((packed)) fibre; struct { uint64_t identity_tag; uint64_t reserved; } __attribute__ ((packed)) i2o; struct { uint32_t array_number; uint32_t reserved1; uint64_t reserved2; } __attribute__ ((packed)) raid; struct { uint8_t device; uint8_t reserved1; uint16_t reserved2; uint32_t reserved3; uint64_t reserved4; } __attribute__ ((packed)) sata; struct { uint64_t reserved1; uint64_t reserved2; } __attribute__ ((packed)) unknown; } device_path; uint8_t reserved4; uint8_t checksum; } __attribute__ ((packed)); struct edd_info { uint8_t device; uint8_t version; uint16_t interface_support; uint16_t legacy_max_cylinder; uint8_t legacy_max_head; uint8_t legacy_sectors_per_track; struct edd_device_params params; } __attribute__ ((packed)); struct boot_params { struct screen_info screen_info; /* 0x000 */ struct apm_bios_info apm_bios_info; /* 0x040 */ uint8_t _pad2[4]; /* 0x054 */ uint64_t tboot_addr; /* 0x058 */ struct ist_info ist_info; /* 0x060 */ uint64_t acpi_rsdp_addr; /* 0x070 */ uint8_t _pad3[8]; /* 0x078 */ uint8_t hd0_info[16]; /* obsolete! */ /* 0x080 */ uint8_t hd1_info[16]; /* obsolete! */ /* 0x090 */ struct sys_desc_table sys_desc_table; /* obsolete! */ /* 0x0a0 */ struct olpc_ofw_header olpc_ofw_header; /* 0x0b0 */ uint32_t ext_ramdisk_image; /* 0x0c0 */ uint32_t ext_ramdisk_size; /* 0x0c4 */ uint32_t ext_cmd_line_ptr; /* 0x0c8 */ uint8_t _pad4[116]; /* 0x0cc */ struct edid_info edid_info; /* 0x140 */ struct efi_info efi_info; /* 0x1c0 */ uint32_t alt_mem_k; /* 0x1e0 */ uint32_t scratch; /* Scratch field! */ /* 0x1e4 */ uint8_t e820_entries; /* 0x1e8 */ uint8_t eddbuf_entries; /* 0x1e9 */ uint8_t edd_mbr_sig_buf_entries; /* 0x1ea */ uint8_t kbd_status; /* 0x1eb */ uint8_t secure_boot; /* 0x1ec */ uint8_t _pad5[2]; /* 0x1ed */ /* * The sentinel is set to a nonzero value (0xff) in header.S. * * A bootloader is supposed to only take setup_header and put * it into a clean boot_params buffer. If it turns out that * it is clumsy or too generous with the buffer, it most * probably will pick up the sentinel variable too. The fact * that this variable then is still 0xff will let kernel * know that some variables in boot_params are invalid and * kernel should zero out certain portions of boot_params. */ uint8_t sentinel; /* 0x1ef */ uint8_t _pad6[1]; /* 0x1f0 */ struct setup_header hdr; /* setup header */ /* 0x1f1 */ uint8_t _pad7[0x290-0x1f1-sizeof(struct setup_header)]; uint32_t edd_mbr_sig_buffer[EDD_MBR_SIG_MAX]; /* 0x290 */ struct boot_e820_entry e820_table[E820_MAX_ENTRIES_ZEROPAGE]; /* 0x2d0 */ uint8_t _pad8[48]; /* 0xcd0 */ struct edd_info eddbuf[EDDMAXNR]; /* 0xd00 */ uint8_t _pad9[276]; /* 0xeec */ } __attribute__((packed)); // End of Linux code noreturn void linux_load(char *config, char *cmdline) { struct file_handle *kernel_file; char *kernel_path = config_get_value(config, 0, "KERNEL_PATH"); if (kernel_path == NULL) panic(true, "linux: KERNEL_PATH not specified"); print("linux: Loading kernel `%s`...\n", kernel_path); if ((kernel_file = uri_open(kernel_path)) == NULL) panic(true, "linux: Failed to open kernel with path `%s`. Is the path correct?", kernel_path); uint32_t signature; fread(kernel_file, &signature, 0x202, sizeof(uint32_t)); // validate signature if (signature != 0x53726448) { panic(true, "linux: Invalid kernel signature"); } size_t setup_code_size = 0; fread(kernel_file, &setup_code_size, 0x1f1, 1); if (setup_code_size == 0) setup_code_size = 4; setup_code_size *= 512; size_t real_mode_code_size = 512 + setup_code_size; struct boot_params *boot_params = ext_mem_alloc(sizeof(struct boot_params)); struct setup_header *setup_header = &boot_params->hdr; size_t setup_header_end = ({ uint8_t x; fread(kernel_file, &x, 0x201, 1); 0x202 + x; }); fread(kernel_file, setup_header, 0x1f1, setup_header_end - 0x1f1); printv("linux: Boot protocol: %u.%u\n", setup_header->version >> 8, setup_header->version & 0xff); if (setup_header->version < 0x203) { panic(true, "linux: Protocols < 2.03 are not supported"); } setup_header->cmd_line_ptr = (uint32_t)(uintptr_t)cmdline; // vid_mode. 0xffff means "normal" setup_header->vid_mode = 0xffff; if (verbose) { char *kernel_version = ext_mem_alloc(128); if (setup_header->kernel_version != 0) { fread(kernel_file, kernel_version, setup_header->kernel_version + 0x200, 128); print("linux: Kernel version: %s\n", kernel_version); } pmm_free(kernel_version, 128); } setup_header->type_of_loader = 0xff; if (!(setup_header->loadflags & (1 << 0))) { panic(true, "linux: Kernels that load at 0x10000 are not supported"); } setup_header->loadflags &= ~(1 << 5); // print early messages // load kernel uintptr_t kernel_load_addr = 0x100000; for (;;) { if (memmap_alloc_range(kernel_load_addr, ALIGN_UP(kernel_file->size - real_mode_code_size, 4096), MEMMAP_BOOTLOADER_RECLAIMABLE, true, false, false, false)) break; kernel_load_addr += 0x100000; } fread(kernel_file, (void *)kernel_load_addr, real_mode_code_size, kernel_file->size - real_mode_code_size); fclose(kernel_file); /////////////////////////////////////// // Modules /////////////////////////////////////// uint32_t modules_mem_base = setup_header->initrd_addr_max; if (modules_mem_base == 0) modules_mem_base = 0x38000000; size_t size_of_all_modules = 0; for (size_t i = 0; ; i++) { char *module_path = config_get_value(config, i, "MODULE_PATH"); if (module_path == NULL) break; struct file_handle *module; if ((module = uri_open(module_path)) == NULL) panic(true, "linux: Failed to open module with path `%s`. Is the path correct?", module_path); size_of_all_modules += module->size; fclose(module); } modules_mem_base -= size_of_all_modules; modules_mem_base = ALIGN_DOWN(modules_mem_base, 4096); for (;;) { if (memmap_alloc_range(modules_mem_base, ALIGN_UP(size_of_all_modules, 4096), MEMMAP_BOOTLOADER_RECLAIMABLE, true, false, false, false)) break; modules_mem_base -= 4096; } size_t _modules_mem_base = modules_mem_base; for (size_t i = 0; ; i++) { char *module_path = config_get_value(config, i, "MODULE_PATH"); if (module_path == NULL) break; print("linux: Loading module `%s`...\n", module_path); struct file_handle *module; if ((module = uri_open(module_path)) == NULL) panic(true, "linux: Could not open `%s`", module_path); fread(module, (void *)_modules_mem_base, 0, module->size); _modules_mem_base += module->size; } if (size_of_all_modules != 0) { setup_header->ramdisk_image = (uint32_t)modules_mem_base; setup_header->ramdisk_size = (uint32_t)size_of_all_modules; } /////////////////////////////////////// // Video /////////////////////////////////////// term_deinit(); struct screen_info *screen_info = &boot_params->screen_info; #if bios == 1 { char *textmode_str = config_get_value(config, 0, "TEXTMODE"); bool textmode = textmode_str != NULL && strcmp(textmode_str, "yes") == 0; if (textmode) { goto set_textmode; } } #endif size_t req_width = 0, req_height = 0, req_bpp = 0; char *resolution = config_get_value(config, 0, "RESOLUTION"); if (resolution != NULL) parse_resolution(&req_width, &req_height, &req_bpp, resolution); struct fb_info fbinfo; #if uefi == 1 gop_force_16 = true; #endif if (!fb_init(&fbinfo, req_width, req_height, req_bpp)) { #if uefi == 1 panic(true, "linux: Unable to set video mode"); #elif bios == 1 set_textmode:; size_t rows, cols; init_vga_textmode(&rows, &cols, false); screen_info->orig_video_mode = 3; screen_info->orig_video_ega_bx = 3; screen_info->orig_video_lines = rows; screen_info->orig_video_cols = cols; screen_info->orig_video_points = 16; screen_info->orig_video_isVGA = VIDEO_TYPE_VGAC; #endif } else { screen_info->capabilities = VIDEO_CAPABILITY_64BIT_BASE | VIDEO_CAPABILITY_SKIP_QUIRKS; screen_info->flags = VIDEO_FLAGS_NOCURSOR; screen_info->lfb_base = (uint32_t)fbinfo.framebuffer_addr; screen_info->ext_lfb_base = (uint32_t)(fbinfo.framebuffer_addr >> 32); screen_info->lfb_size = fbinfo.framebuffer_pitch * fbinfo.framebuffer_height; screen_info->lfb_width = fbinfo.framebuffer_width; screen_info->lfb_height = fbinfo.framebuffer_height; screen_info->lfb_depth = fbinfo.framebuffer_bpp; screen_info->lfb_linelength = fbinfo.framebuffer_pitch; screen_info->red_size = fbinfo.red_mask_size; screen_info->red_pos = fbinfo.red_mask_shift; screen_info->green_size = fbinfo.green_mask_size; screen_info->green_pos = fbinfo.green_mask_shift; screen_info->blue_size = fbinfo.blue_mask_size; screen_info->blue_pos = fbinfo.blue_mask_shift; #if bios == 1 screen_info->orig_video_isVGA = VIDEO_TYPE_VLFB; #elif uefi == 1 screen_info->orig_video_isVGA = VIDEO_TYPE_EFI; #endif } struct edid_info_struct *edid_info = get_edid_info(); if (edid_info != NULL) { memcpy(&boot_params->edid_info, edid_info, sizeof(struct edid_info_struct)); } /////////////////////////////////////// // RSDP /////////////////////////////////////// boot_params->acpi_rsdp_addr = (uintptr_t)acpi_get_rsdp(); /////////////////////////////////////// // UEFI /////////////////////////////////////// #if uefi == 1 efi_exit_boot_services(); #if defined (__x86_64__) memcpy(&boot_params->efi_info.efi_loader_signature, "EL64", 4); boot_params->efi_info.efi_systab = (uint32_t)(uint64_t)(uintptr_t)gST; boot_params->efi_info.efi_systab_hi = (uint32_t)((uint64_t)(uintptr_t)gST >> 32); boot_params->efi_info.efi_memmap = (uint32_t)(uint64_t)(uintptr_t)efi_mmap; boot_params->efi_info.efi_memmap_hi = (uint32_t)((uint64_t)(uintptr_t)efi_mmap >> 32); boot_params->efi_info.efi_memmap_size = efi_mmap_size; boot_params->efi_info.efi_memdesc_size = efi_desc_size; boot_params->efi_info.efi_memdesc_version = efi_desc_ver; #endif #endif /////////////////////////////////////// // e820 /////////////////////////////////////// struct boot_e820_entry *e820_table = boot_params->e820_table; size_t mmap_entries; struct e820_entry_t *mmap = get_raw_memmap(&mmap_entries); for (size_t i = 0, j = 0; i < mmap_entries; i++) { if (mmap[i].type >= 0x1000) { continue; } e820_table[j].addr = mmap[i].base; e820_table[j].size = mmap[i].length; e820_table[j].type = mmap[i].type; j++; boot_params->e820_entries = j; } /////////////////////////////////////// // Spin up /////////////////////////////////////// irq_flush_type = IRQ_PIC_ONLY_FLUSH; common_spinup(linux_spinup, 2, (uint32_t)kernel_load_addr, (uint32_t)(uintptr_t)boot_params); }