summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
Diffstat
-rw-r--r--arch/x86/Kconfig7
-rw-r--r--arch/x86/boot/compressed/Makefile10
-rw-r--r--arch/x86/boot/compressed/eboot.c1022
-rw-r--r--arch/x86/boot/compressed/eboot.h61
-rw-r--r--arch/x86/boot/compressed/efi_stub_32.S86
-rw-r--r--arch/x86/boot/compressed/efi_stub_64.S1
-rw-r--r--arch/x86/boot/compressed/head_32.S22
-rw-r--r--arch/x86/boot/compressed/head_64.S20
-rw-r--r--arch/x86/boot/compressed/string.c9
-rw-r--r--arch/x86/boot/header.S158
-rw-r--r--arch/x86/boot/string.c35
-rw-r--r--arch/x86/boot/tools/build.c39
-rw-r--r--arch/x86/include/asm/bootparam.h2
-rw-r--r--arch/x86/include/asm/efi.h4
-rw-r--r--arch/x86/kernel/asm-offsets.c2
-rw-r--r--arch/x86/kernel/setup.c7
-rw-r--r--include/linux/efi.h136
17 files changed, 1613 insertions, 8 deletions
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 1a31254ceb83..2513da0e6b67 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -1489,6 +1489,13 @@ config EFI
resultant kernel should continue to boot on existing non-EFI
platforms.
+config EFI_STUB
+ bool "EFI stub support"
+ depends on EFI
+ ---help---
+ This kernel feature allows a bzImage to be loaded directly
+ by EFI firmware without the use of a bootloader.
+
config SECCOMP
def_bool y
prompt "Enable seccomp to safely compute untrusted bytecode"
diff --git a/arch/x86/boot/compressed/Makefile b/arch/x86/boot/compressed/Makefile
index 09664efb9cee..b123b9a8f5b3 100644
--- a/arch/x86/boot/compressed/Makefile
+++ b/arch/x86/boot/compressed/Makefile
@@ -23,7 +23,15 @@ LDFLAGS_vmlinux := -T
hostprogs-y := mkpiggy
-$(obj)/vmlinux: $(obj)/vmlinux.lds $(obj)/head_$(BITS).o $(obj)/misc.o $(obj)/string.o $(obj)/cmdline.o $(obj)/early_serial_console.o $(obj)/piggy.o FORCE
+VMLINUX_OBJS = $(obj)/vmlinux.lds $(obj)/head_$(BITS).o $(obj)/misc.o \
+ $(obj)/string.o $(obj)/cmdline.o $(obj)/early_serial_console.o \
+ $(obj)/piggy.o
+
+ifeq ($(CONFIG_EFI_STUB), y)
+ VMLINUX_OBJS += $(obj)/eboot.o $(obj)/efi_stub_$(BITS).o
+endif
+
+$(obj)/vmlinux: $(VMLINUX_OBJS) FORCE
$(call if_changed,ld)
@:
diff --git a/arch/x86/boot/compressed/eboot.c b/arch/x86/boot/compressed/eboot.c
new file mode 100644
index 000000000000..fec216f4fbc3
--- /dev/null
+++ b/arch/x86/boot/compressed/eboot.c
@@ -0,0 +1,1022 @@
+/* -----------------------------------------------------------------------
+ *
+ * Copyright 2011 Intel Corporation; author Matt Fleming
+ *
+ * This file is part of the Linux kernel, and is made available under
+ * the terms of the GNU General Public License version 2.
+ *
+ * ----------------------------------------------------------------------- */
+
+#include <linux/efi.h>
+#include <asm/efi.h>
+#include <asm/setup.h>
+#include <asm/desc.h>
+
+#include "eboot.h"
+
+static efi_system_table_t *sys_table;
+
+static efi_status_t __get_map(efi_memory_desc_t **map, unsigned long *map_size,
+ unsigned long *desc_size)
+{
+ efi_memory_desc_t *m = NULL;
+ efi_status_t status;
+ unsigned long key;
+ u32 desc_version;
+
+ *map_size = sizeof(*m) * 32;
+again:
+ /*
+ * Add an additional efi_memory_desc_t because we're doing an
+ * allocation which may be in a new descriptor region.
+ */
+ *map_size += sizeof(*m);
+ status = efi_call_phys3(sys_table->boottime->allocate_pool,
+ EFI_LOADER_DATA, *map_size, (void **)&m);
+ if (status != EFI_SUCCESS)
+ goto fail;
+
+ status = efi_call_phys5(sys_table->boottime->get_memory_map, map_size,
+ m, &key, desc_size, &desc_version);
+ if (status == EFI_BUFFER_TOO_SMALL) {
+ efi_call_phys1(sys_table->boottime->free_pool, m);
+ goto again;
+ }
+
+ if (status != EFI_SUCCESS)
+ efi_call_phys1(sys_table->boottime->free_pool, m);
+
+fail:
+ *map = m;
+ return status;
+}
+
+/*
+ * Allocate at the highest possible address that is not above 'max'.
+ */
+static efi_status_t high_alloc(unsigned long size, unsigned long align,
+ unsigned long *addr, unsigned long max)
+{
+ unsigned long map_size, desc_size;
+ efi_memory_desc_t *map;
+ efi_status_t status;
+ unsigned long nr_pages;
+ u64 max_addr = 0;
+ int i;
+
+ status = __get_map(&map, &map_size, &desc_size);
+ if (status != EFI_SUCCESS)
+ goto fail;
+
+ nr_pages = round_up(size, EFI_PAGE_SIZE) / EFI_PAGE_SIZE;
+again:
+ for (i = 0; i < map_size / desc_size; i++) {
+ efi_memory_desc_t *desc;
+ unsigned long m = (unsigned long)map;
+ u64 start, end;
+
+ desc = (efi_memory_desc_t *)(m + (i * desc_size));
+ if (desc->type != EFI_CONVENTIONAL_MEMORY)
+ continue;
+
+ if (desc->num_pages < nr_pages)
+ continue;
+
+ start = desc->phys_addr;
+ end = start + desc->num_pages * (1UL << EFI_PAGE_SHIFT);
+
+ if ((start + size) > end || (start + size) > max)
+ continue;
+
+ if (end - size > max)
+ end = max;
+
+ if (round_down(end - size, align) < start)
+ continue;
+
+ start = round_down(end - size, align);
+
+ /*
+ * Don't allocate at 0x0. It will confuse code that
+ * checks pointers against NULL.
+ */
+ if (start == 0x0)
+ continue;
+
+ if (start > max_addr)
+ max_addr = start;
+ }
+
+ if (!max_addr)
+ status = EFI_NOT_FOUND;
+ else {
+ status = efi_call_phys4(sys_table->boottime->allocate_pages,
+ EFI_ALLOCATE_ADDRESS, EFI_LOADER_DATA,
+ nr_pages, &max_addr);
+ if (status != EFI_SUCCESS) {
+ max = max_addr;
+ max_addr = 0;
+ goto again;
+ }
+
+ *addr = max_addr;
+ }
+
+free_pool:
+ efi_call_phys1(sys_table->boottime->free_pool, map);
+
+fail:
+ return status;
+}
+
+/*
+ * Allocate at the lowest possible address.
+ */
+static efi_status_t low_alloc(unsigned long size, unsigned long align,
+ unsigned long *addr)
+{
+ unsigned long map_size, desc_size;
+ efi_memory_desc_t *map;
+ efi_status_t status;
+ unsigned long nr_pages;
+ int i;
+
+ status = __get_map(&map, &map_size, &desc_size);
+ if (status != EFI_SUCCESS)
+ goto fail;
+
+ nr_pages = round_up(size, EFI_PAGE_SIZE) / EFI_PAGE_SIZE;
+ for (i = 0; i < map_size / desc_size; i++) {
+ efi_memory_desc_t *desc;
+ unsigned long m = (unsigned long)map;
+ u64 start, end;
+
+ desc = (efi_memory_desc_t *)(m + (i * desc_size));
+
+ if (desc->type != EFI_CONVENTIONAL_MEMORY)
+ continue;
+
+ if (desc->num_pages < nr_pages)
+ continue;
+
+ start = desc->phys_addr;
+ end = start + desc->num_pages * (1UL << EFI_PAGE_SHIFT);
+
+ /*
+ * Don't allocate at 0x0. It will confuse code that
+ * checks pointers against NULL. Skip the first 8
+ * bytes so we start at a nice even number.
+ */
+ if (start == 0x0)
+ start += 8;
+
+ start = round_up(start, align);
+ if ((start + size) > end)
+ continue;
+
+ status = efi_call_phys4(sys_table->boottime->allocate_pages,
+ EFI_ALLOCATE_ADDRESS, EFI_LOADER_DATA,
+ nr_pages, &start);
+ if (status == EFI_SUCCESS) {
+ *addr = start;
+ break;
+ }
+ }
+
+ if (i == map_size / desc_size)
+ status = EFI_NOT_FOUND;
+
+free_pool:
+ efi_call_phys1(sys_table->boottime->free_pool, map);
+fail:
+ return status;
+}
+
+static void low_free(unsigned long size, unsigned long addr)
+{
+ unsigned long nr_pages;
+
+ nr_pages = round_up(size, EFI_PAGE_SIZE) / EFI_PAGE_SIZE;
+ efi_call_phys2(sys_table->boottime->free_pages, addr, size);
+}
+
+static void find_bits(unsigned long mask, u8 *pos, u8 *size)
+{
+ u8 first, len;
+
+ first = 0;
+ len = 0;
+
+ if (mask) {
+ while (!(mask & 0x1)) {
+ mask = mask >> 1;
+ first++;
+ }
+
+ while (mask & 0x1) {
+ mask = mask >> 1;
+ len++;
+ }
+ }
+
+ *pos = first;
+ *size = len;
+}
+
+/*
+ * See if we have Graphics Output Protocol
+ */
+static efi_status_t setup_gop(struct screen_info *si, efi_guid_t *proto,
+ unsigned long size)
+{
+ struct efi_graphics_output_protocol *gop, *first_gop;
+ struct efi_pixel_bitmask pixel_info;
+ unsigned long nr_gops;
+ efi_status_t status;
+ void **gop_handle;
+ u16 width, height;
+ u32 fb_base, fb_size;
+ u32 pixels_per_scan_line;
+ int pixel_format;
+ int i;
+
+ status = efi_call_phys3(sys_table->boottime->allocate_pool,
+ EFI_LOADER_DATA, size, &gop_handle);
+ if (status != EFI_SUCCESS)
+ return status;
+
+ status = efi_call_phys5(sys_table->boottime->locate_handle,
+ EFI_LOCATE_BY_PROTOCOL, proto,
+ NULL, &size, gop_handle);
+ if (status != EFI_SUCCESS)
+ goto free_handle;
+
+ first_gop = NULL;
+
+ nr_gops = size / sizeof(void *);
+ for (i = 0; i < nr_gops; i++) {
+ struct efi_graphics_output_mode_info *info;
+ efi_guid_t pciio_proto = EFI_PCI_IO_PROTOCOL_GUID;
+ void *pciio;
+ void *h = gop_handle[i];
+
+ status = efi_call_phys3(sys_table->boottime->handle_protocol,
+ h, proto, &gop);
+ if (status != EFI_SUCCESS)
+ continue;
+
+ efi_call_phys3(sys_table->boottime->handle_protocol,
+ h, &pciio_proto, &pciio);
+
+ status = efi_call_phys4(gop->query_mode, gop,
+ gop->mode->mode, &size, &info);
+ if (status == EFI_SUCCESS && (!first_gop || pciio)) {
+ /*
+ * Apple provide GOPs that are not backed by
+ * real hardware (they're used to handle
+ * multiple displays). The workaround is to
+ * search for a GOP implementing the PCIIO
+ * protocol, and if one isn't found, to just
+ * fallback to the first GOP.
+ */
+ width = info->horizontal_resolution;
+ height = info->vertical_resolution;
+ fb_base = gop->mode->frame_buffer_base;
+ fb_size = gop->mode->frame_buffer_size;
+ pixel_format = info->pixel_format;
+ pixel_info = info->pixel_information;
+ pixels_per_scan_line = info->pixels_per_scan_line;
+
+ /*
+ * Once we've found a GOP supporting PCIIO,
+ * don't bother looking any further.
+ */
+ if (pciio)
+ break;
+
+ first_gop = gop;
+ }
+ }
+
+ /* Did we find any GOPs? */
+ if (!first_gop)
+ goto free_handle;
+
+ /* EFI framebuffer */
+ si->orig_video_isVGA = VIDEO_TYPE_EFI;
+
+ si->lfb_width = width;
+ si->lfb_height = height;
+ si->lfb_base = fb_base;
+ si->lfb_size = fb_size;
+ si->pages = 1;
+
+ if (pixel_format == PIXEL_RGB_RESERVED_8BIT_PER_COLOR) {
+ si->lfb_depth = 32;
+ si->lfb_linelength = pixels_per_scan_line * 4;
+ si->red_size = 8;
+ si->red_pos = 0;
+ si->green_size = 8;
+ si->green_pos = 8;
+ si->blue_size = 8;
+ si->blue_pos = 16;
+ si->rsvd_size = 8;
+ si->rsvd_pos = 24;
+ } else if (pixel_format == PIXEL_BGR_RESERVED_8BIT_PER_COLOR) {
+ si->lfb_depth = 32;
+ si->lfb_linelength = pixels_per_scan_line * 4;
+ si->red_size = 8;
+ si->red_pos = 16;
+ si->green_size = 8;
+ si->green_pos = 8;
+ si->blue_size = 8;
+ si->blue_pos = 0;
+ si->rsvd_size = 8;
+ si->rsvd_pos = 24;
+ } else if (pixel_format == PIXEL_BIT_MASK) {
+ find_bits(pixel_info.red_mask, &si->red_pos, &si->red_size);
+ find_bits(pixel_info.green_mask, &si->green_pos,
+ &si->green_size);
+ find_bits(pixel_info.blue_mask, &si->blue_pos, &si->blue_size);
+ find_bits(pixel_info.reserved_mask, &si->rsvd_pos,
+ &si->rsvd_size);
+ si->lfb_depth = si->red_size + si->green_size +
+ si->blue_size + si->rsvd_size;
+ si->lfb_linelength = (pixels_per_scan_line * si->lfb_depth) / 8;
+ } else {
+ si->lfb_depth = 4;
+ si->lfb_linelength = si->lfb_width / 2;
+ si->red_size = 0;
+ si->red_pos = 0;
+ si->green_size = 0;
+ si->green_pos = 0;
+ si->blue_size = 0;
+ si->blue_pos = 0;
+ si->rsvd_size = 0;
+ si->rsvd_pos = 0;
+ }
+
+free_handle:
+ efi_call_phys1(sys_table->boottime->free_pool, gop_handle);
+ return status;
+}
+
+/*
+ * See if we have Universal Graphics Adapter (UGA) protocol
+ */
+static efi_status_t setup_uga(struct screen_info *si, efi_guid_t *uga_proto,
+ unsigned long size)
+{
+ struct efi_uga_draw_protocol *uga, *first_uga;
+ unsigned long nr_ugas;
+ efi_status_t status;
+ u32 width, height;
+ void **uga_handle = NULL;
+ int i;
+
+ status = efi_call_phys3(sys_table->boottime->allocate_pool,
+ EFI_LOADER_DATA, size, &uga_handle);
+ if (status != EFI_SUCCESS)
+ return status;
+
+ status = efi_call_phys5(sys_table->boottime->locate_handle,
+ EFI_LOCATE_BY_PROTOCOL, uga_proto,
+ NULL, &size, uga_handle);
+ if (status != EFI_SUCCESS)
+ goto free_handle;
+
+ first_uga = NULL;
+
+ nr_ugas = size / sizeof(void *);
+ for (i = 0; i < nr_ugas; i++) {
+ efi_guid_t pciio_proto = EFI_PCI_IO_PROTOCOL_GUID;
+ void *handle = uga_handle[i];
+ u32 w, h, depth, refresh;
+ void *pciio;
+
+ status = efi_call_phys3(sys_table->boottime->handle_protocol,
+ handle, uga_proto, &uga);
+ if (status != EFI_SUCCESS)
+ continue;
+
+ efi_call_phys3(sys_table->boottime->handle_protocol,
+ handle, &pciio_proto, &pciio);
+
+ status = efi_call_phys5(uga->get_mode, uga, &w, &h,
+ &depth, &refresh);
+ if (status == EFI_SUCCESS && (!first_uga || pciio)) {
+ width = w;
+ height = h;
+
+ /*
+ * Once we've found a UGA supporting PCIIO,
+ * don't bother looking any further.
+ */
+ if (pciio)
+ break;
+
+ first_uga = uga;
+ }
+ }
+
+ if (!first_uga)
+ goto free_handle;
+
+ /* EFI framebuffer */
+ si->orig_video_isVGA = VIDEO_TYPE_EFI;
+
+ si->lfb_depth = 32;
+ si->lfb_width = width;
+ si->lfb_height = height;
+
+ si->red_size = 8;
+ si->red_pos = 16;
+ si->green_size = 8;
+ si->green_pos = 8;
+ si->blue_size = 8;
+ si->blue_pos = 0;
+ si->rsvd_size = 8;
+ si->rsvd_pos = 24;
+
+
+free_handle:
+ efi_call_phys1(sys_table->boottime->free_pool, uga_handle);
+ return status;
+}
+
+void setup_graphics(struct boot_params *boot_params)
+{
+ efi_guid_t graphics_proto = EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID;
+ struct screen_info *si;
+ efi_guid_t uga_proto = EFI_UGA_PROTOCOL_GUID;
+ efi_status_t status;
+ unsigned long size;
+ void **gop_handle = NULL;
+ void **uga_handle = NULL;
+
+ si = &boot_params->screen_info;
+ memset(si, 0, sizeof(*si));
+
+ size = 0;
+ status = efi_call_phys5(sys_table->boottime->locate_handle,
+ EFI_LOCATE_BY_PROTOCOL, &graphics_proto,
+ NULL, &size, gop_handle);
+ if (status == EFI_BUFFER_TOO_SMALL)
+ status = setup_gop(si, &graphics_proto, size);
+
+ if (status != EFI_SUCCESS) {
+ size = 0;
+ status = efi_call_phys5(sys_table->boottime->locate_handle,
+ EFI_LOCATE_BY_PROTOCOL, &uga_proto,
+ NULL, &size, uga_handle);
+ if (status == EFI_BUFFER_TOO_SMALL)
+ setup_uga(si, &uga_proto, size);
+ }
+}
+
+struct initrd {
+ efi_file_handle_t *handle;
+ u64 size;
+};
+
+/*
+ * Check the cmdline for a LILO-style initrd= arguments.
+ *
+ * We only support loading an initrd from the same filesystem as the
+ * kernel image.
+ */
+static efi_status_t handle_ramdisks(efi_loaded_image_t *image,
+ struct setup_header *hdr)
+{
+ struct initrd *initrds;
+ unsigned long initrd_addr;
+ efi_guid_t fs_proto = EFI_FILE_SYSTEM_GUID;
+ u64 initrd_total;
+ efi_file_io_interface_t *io;
+ efi_file_handle_t *fh;
+ efi_status_t status;
+ int nr_initrds;
+ char *str;
+ int i, j, k;
+
+ initrd_addr = 0;
+ initrd_total = 0;
+
+ str = (char *)(unsigned long)hdr->cmd_line_ptr;
+
+ j = 0; /* See close_handles */
+
+ if (!str || !*str)
+ return EFI_SUCCESS;
+
+ for (nr_initrds = 0; *str; nr_initrds++) {
+ str = strstr(str, "initrd=");
+ if (!str)
+ break;
+
+ str += 7;
+
+ /* Skip any leading slashes */
+ while (*str == '/' || *str == '\\')
+ str++;
+
+ while (*str && *str != ' ' && *str != '\n')
+ str++;
+ }
+
+ if (!nr_initrds)
+ return EFI_SUCCESS;
+
+ status = efi_call_phys3(sys_table->boottime->allocate_pool,
+ EFI_LOADER_DATA,
+ nr_initrds * sizeof(*initrds),
+ &initrds);
+ if (status != EFI_SUCCESS)
+ goto fail;
+
+ str = (char *)(unsigned long)hdr->cmd_line_ptr;
+ for (i = 0; i < nr_initrds; i++) {
+ struct initrd *initrd;
+ efi_file_handle_t *h;
+ efi_file_info_t *info;
+ efi_char16_t filename[256];
+ unsigned long info_sz;
+ efi_guid_t info_guid = EFI_FILE_INFO_ID;
+ efi_char16_t *p;
+ u64 file_sz;
+
+ str = strstr(str, "initrd=");
+ if (!str)
+ break;
+
+ str += 7;
+
+ initrd = &initrds[i];
+ p = filename;
+
+ /* Skip any leading slashes */
+ while (*str == '/' || *str == '\\')
+ str++;
+
+ while (*str && *str != ' ' && *str != '\n') {
+ if (p >= filename + sizeof(filename))
+ break;
+
+ *p++ = *str++;
+ }
+
+ *p = '\0';
+
+ /* Only open the volume once. */
+ if (!i) {
+ efi_boot_services_t *boottime;
+
+ boottime = sys_table->boottime;
+
+ status = efi_call_phys3(boottime->handle_protocol,
+ image->device_handle, &fs_proto, &io);
+ if (status != EFI_SUCCESS)
+ goto free_initrds;
+
+ status = efi_call_phys2(io->open_volume, io, &fh);
+ if (status != EFI_SUCCESS)
+ goto free_initrds;
+ }
+
+ status = efi_call_phys5(fh->open, fh, &h, filename,
+ EFI_FILE_MODE_READ, (u64)0);
+ if (status != EFI_SUCCESS)
+ goto close_handles;
+
+ initrd->handle = h;
+
+ info_sz = 0;
+ status = efi_call_phys4(h->get_info, h, &info_guid,
+ &info_sz, NULL);
+ if (status != EFI_BUFFER_TOO_SMALL)
+ goto close_handles;
+
+grow:
+ status = efi_call_phys3(sys_table->boottime->allocate_pool,
+ EFI_LOADER_DATA, info_sz, &info);
+ if (status != EFI_SUCCESS)
+ goto close_handles;
+
+ status = efi_call_phys4(h->get_info, h, &info_guid,
+ &info_sz, info);
+ if (status == EFI_BUFFER_TOO_SMALL) {
+ efi_call_phys1(sys_table->boottime->free_pool, info);
+ goto grow;
+ }
+
+ file_sz = info->file_size;
+ efi_call_phys1(sys_table->boottime->free_pool, info);
+
+ if (status != EFI_SUCCESS)
+ goto close_handles;
+
+ initrd->size = file_sz;
+ initrd_total += file_sz;
+ }
+
+ if (initrd_total) {
+ unsigned long addr;
+
+ /*
+ * Multiple initrd's need to be at consecutive
+ * addresses in memory, so allocate enough memory for
+ * all the initrd's.
+ */
+ status = high_alloc(initrd_total, 0x1000,
+ &initrd_addr, hdr->initrd_addr_max);
+ if (status != EFI_SUCCESS)
+ goto close_handles;
+
+ /* We've run out of free low memory. */
+ if (initrd_addr > hdr->initrd_addr_max) {
+ status = EFI_INVALID_PARAMETER;
+ goto free_initrd_total;
+ }
+
+ addr = initrd_addr;
+ for (j = 0; j < nr_initrds; j++) {
+ u64 size;
+
+ size = initrds[j].size;
+ while (size) {
+ u64 chunksize;
+ if (size > EFI_READ_CHUNK_SIZE)
+ chunksize = EFI_READ_CHUNK_SIZE;
+ else
+ chunksize = size;
+ status = efi_call_phys3(fh->read,
+ initrds[j].handle,
+ &chunksize, addr);
+ if (status != EFI_SUCCESS)
+ goto free_initrd_total;
+ addr += chunksize;
+ size -= chunksize;
+ }
+
+ efi_call_phys1(fh->close, initrds[j].handle);
+ }
+
+ }
+
+ efi_call_phys1(sys_table->boottime->free_pool, initrds);
+
+ hdr->ramdisk_image = initrd_addr;
+ hdr->ramdisk_size = initrd_total;
+
+ return status;
+
+free_initrd_total:
+ low_free(initrd_total, initrd_addr);
+
+close_handles:
+ for (k = j; k < nr_initrds; k++)
+ efi_call_phys1(fh->close, initrds[k].handle);
+free_initrds:
+ efi_call_phys1(sys_table->boottime->free_pool, initrds);
+fail:
+ hdr->ramdisk_image = 0;
+ hdr->ramdisk_size = 0;
+
+ return status;
+}
+
+/*
+ * Because the x86 boot code expects to be passed a boot_params we
+ * need to create one ourselves (usually the bootloader would create
+ * one for us).
+ */
+static efi_status_t make_boot_params(struct boot_params *boot_params,
+ efi_loaded_image_t *image,
+ void *handle)
+{
+ struct efi_info *efi = &boot_params->efi_info;
+ struct apm_bios_info *bi = &boot_params->apm_bios_info;
+ struct sys_desc_table *sdt = &boot_params->sys_desc_table;
+ struct e820entry *e820_map = &boot_params->e820_map[0];
+ struct e820entry *prev = NULL;
+ struct setup_header *hdr = &boot_params->hdr;
+ unsigned long size, key, desc_size, _size;
+ efi_memory_desc_t *mem_map;
+ void *options = image->load_options;
+ u32 load_options_size = image->load_options_size / 2; /* ASCII */
+ int options_size = 0;
+ efi_status_t status;
+ __u32 desc_version;
+ unsigned long cmdline;
+ u8 nr_entries;
+ u16 *s2;
+ u8 *s1;
+ int i;
+
+ hdr->type_of_loader = 0x21;
+
+ /* Convert unicode cmdline to ascii */
+ cmdline = 0;
+ s2 = (u16 *)options;
+
+ if (s2) {
+ while (*s2 && *s2 != '\n' && options_size < load_options_size) {
+ s2++;
+ options_size++;
+ }
+
+ if (options_size) {
+ if (options_size > hdr->cmdline_size)
+ options_size = hdr->cmdline_size;
+
+ options_size++; /* NUL termination */
+
+ status = low_alloc(options_size, 1, &cmdline);
+ if (status != EFI_SUCCESS)
+ goto fail;
+
+ s1 = (u8 *)(unsigned long)cmdline;
+ s2 = (u16 *)options;
+
+ for (i = 0; i < options_size - 1; i++)
+ *s1++ = *s2++;
+
+ *s1 = '\0';
+ }
+ }
+
+ hdr->cmd_line_ptr = cmdline;
+
+ hdr->ramdisk_image = 0;
+ hdr->ramdisk_size = 0;
+
+ status = handle_ramdisks(image, hdr);
+ if (status != EFI_SUCCESS)
+ goto free_cmdline;
+
+ setup_graphics(boot_params);
+
+ /* Clear APM BIOS info */
+ memset(bi, 0, sizeof(*bi));
+
+ memset(sdt, 0, sizeof(*sdt));
+
+ memcpy(&efi->efi_loader_signature, EFI_LOADER_SIGNATURE, sizeof(__u32));
+
+ size = sizeof(*mem_map) * 32;
+
+again:
+ size += sizeof(*mem_map);
+ _size = size;
+ status = low_alloc(size, 1, (unsigned long *)&mem_map);
+ if (status != EFI_SUCCESS)
+ goto free_cmdline;
+
+ status = efi_call_phys5(sys_table->boottime->get_memory_map, &size,
+ mem_map, &key, &desc_size, &desc_version);
+ if (status == EFI_BUFFER_TOO_SMALL) {
+ low_free(_size, (unsigned long)mem_map);
+ goto again;
+ }
+
+ if (status != EFI_SUCCESS)
+ goto free_mem_map;
+
+ efi->efi_systab = (unsigned long)sys_table;
+ efi->efi_memdesc_size = desc_size;
+ efi->efi_memdesc_version = desc_version;
+ efi->efi_memmap = (unsigned long)mem_map;
+ efi->efi_memmap_size = size;
+
+#ifdef CONFIG_X86_64
+ efi->efi_systab_hi = (unsigned long)sys_table >> 32;
+ efi->efi_memmap_hi = (unsigned long)mem_map >> 32;
+#endif
+
+ /* Might as well exit boot services now */
+ status = efi_call_phys2(sys_table->boottime->exit_boot_services,
+ handle, key);
+ if (status != EFI_SUCCESS)
+ goto free_mem_map;
+
+ /* Historic? */
+ boot_params->alt_mem_k = 32 * 1024;
+
+ /*
+ * Convert the EFI memory map to E820.
+ */
+ nr_entries = 0;
+ for (i = 0; i < size / desc_size; i++) {
+ efi_memory_desc_t *d;
+ unsigned int e820_type = 0;
+ unsigned long m = (unsigned long)mem_map;
+
+ d = (efi_memory_desc_t *)(m + (i * desc_size));
+ switch (d->type) {
+ case EFI_RESERVED_TYPE:
+ case EFI_RUNTIME_SERVICES_CODE:
+ case EFI_RUNTIME_SERVICES_DATA:
+ case EFI_MEMORY_MAPPED_IO:
+ case EFI_MEMORY_MAPPED_IO_PORT_SPACE:
+ case EFI_PAL_CODE:
+ e820_type = E820_RESERVED;
+ break;
+
+ case EFI_UNUSABLE_MEMORY:
+ e820_type = E820_UNUSABLE;
+ break;
+
+ case EFI_ACPI_RECLAIM_MEMORY:
+ e820_type = E820_ACPI;
+ break;
+
+ case EFI_LOADER_CODE:
+ case EFI_LOADER_DATA:
+ case EFI_BOOT_SERVICES_CODE:
+ case EFI_BOOT_SERVICES_DATA:
+ case EFI_CONVENTIONAL_MEMORY:
+ e820_type = E820_RAM;
+ break;
+
+ case EFI_ACPI_MEMORY_NVS:
+ e820_type = E820_NVS;
+ break;
+
+ default:
+ continue;
+ }
+
+ /* Merge adjacent mappings */
+ if (prev && prev->type == e820_type &&
+ (prev->addr + prev->size) == d->phys_addr)
+ prev->size += d->num_pages << 12;
+ else {
+ e820_map->addr = d->phys_addr;
+ e820_map->size = d->num_pages << 12;
+ e820_map->type = e820_type;
+ prev = e820_map++;
+ nr_entries++;
+ }
+ }
+
+ boot_params->e820_entries = nr_entries;
+
+ return EFI_SUCCESS;
+
+free_mem_map:
+ low_free(_size, (unsigned long)mem_map);
+free_cmdline:
+ if (options_size)
+ low_free(options_size, hdr->cmd_line_ptr);
+fail:
+ return status;
+}
+
+/*
+ * On success we return a pointer to a boot_params structure, and NULL
+ * on failure.
+ */
+struct boot_params *efi_main(void *handle, efi_system_table_t *_table)
+{
+ struct boot_params *boot_params;
+ unsigned long start, nr_pages;
+ struct desc_ptr *gdt, *idt;
+ efi_loaded_image_t *image;
+ struct setup_header *hdr;
+ efi_status_t status;
+ efi_guid_t proto = LOADED_IMAGE_PROTOCOL_GUID;
+ struct desc_struct *desc;
+
+ sys_table = _table;
+
+ /* Check if we were booted by the EFI firmware */
+ if (sys_table->hdr.signature != EFI_SYSTEM_TABLE_SIGNATURE)
+ goto fail;
+
+ status = efi_call_phys3(sys_table->boottime->handle_protocol,
+ handle, &proto, (void *)&image);
+ if (status != EFI_SUCCESS)
+ goto fail;
+
+ status = low_alloc(0x4000, 1, (unsigned long *)&boot_params);
+ if (status != EFI_SUCCESS)
+ goto fail;
+
+ memset(boot_params, 0x0, 0x4000);
+
+ /* Copy first two sectors to boot_params */
+ memcpy(boot_params, image->image_base, 1024);
+
+ hdr = &boot_params->hdr;
+
+ /*
+ * The EFI firmware loader could have placed the kernel image
+ * anywhere in memory, but the kernel has various restrictions
+ * on the max physical address it can run at. Attempt to move
+ * the kernel to boot_params.pref_address, or as low as
+ * possible.
+ */
+ start = hdr->pref_address;
+ nr_pages = round_up(hdr->init_size, EFI_PAGE_SIZE) / EFI_PAGE_SIZE;
+
+ status = efi_call_phys4(sys_table->boottime->allocate_pages,
+ EFI_ALLOCATE_ADDRESS, EFI_LOADER_DATA,
+ nr_pages, &start);
+ if (status != EFI_SUCCESS) {
+ status = low_alloc(hdr->init_size, hdr->kernel_alignment,
+ &start);
+ if (status != EFI_SUCCESS)
+ goto fail;
+ }
+
+ hdr->code32_start = (__u32)start;
+ hdr->pref_address = (__u64)(unsigned long)image->image_base;
+
+ memcpy((void *)start, image->image_base, image->image_size);
+
+ status = efi_call_phys3(sys_table->boottime->allocate_pool,
+ EFI_LOADER_DATA, sizeof(*gdt),
+ (void **)&gdt);
+ if (status != EFI_SUCCESS)
+ goto fail;
+
+ gdt->size = 0x800;
+ status = low_alloc(gdt->size, 8, (unsigned long *)&gdt->address);
+ if (status != EFI_SUCCESS)
+ goto fail;
+
+ status = efi_call_phys3(sys_table->boottime->allocate_pool,
+ EFI_LOADER_DATA, sizeof(*idt),
+ (void **)&idt);
+ if (status != EFI_SUCCESS)
+ goto fail;
+
+ idt->size = 0;
+ idt->address = 0;
+
+ status = make_boot_params(boot_params, image, handle);
+ if (status != EFI_SUCCESS)
+ goto fail;
+
+ memset((char *)gdt->address, 0x0, gdt->size);
+ desc = (struct desc_struct *)gdt->address;
+
+ /* The first GDT is a dummy and the second is unused. */
+ desc += 2;
+
+ desc->limit0 = 0xffff;
+ desc->base0 = 0x0000;
+ desc->base1 = 0x0000;
+ desc->type = SEG_TYPE_CODE | SEG_TYPE_EXEC_READ;
+ desc->s = DESC_TYPE_CODE_DATA;
+ desc->dpl = 0;
+ desc->p = 1;
+ desc->limit = 0xf;
+ desc->avl = 0;
+ desc->l = 0;
+ desc->d = SEG_OP_SIZE_32BIT;
+ desc->g = SEG_GRANULARITY_4KB;
+ desc->base2 = 0x00;
+
+ desc++;
+ desc->limit0 = 0xffff;
+ desc->base0 = 0x0000;
+ desc->base1 = 0x0000;
+ desc->type = SEG_TYPE_DATA | SEG_TYPE_READ_WRITE;
+ desc->s = DESC_TYPE_CODE_DATA;
+ desc->dpl = 0;
+ desc->p = 1;
+ desc->limit = 0xf;
+ desc->avl = 0;
+ desc->l = 0;
+ desc->d = SEG_OP_SIZE_32BIT;
+ desc->g = SEG_GRANULARITY_4KB;
+ desc->base2 = 0x00;
+
+#ifdef CONFIG_X86_64
+ /* Task segment value */
+ desc++;
+ desc->limit0 = 0x0000;
+ desc->base0 = 0x0000;
+ desc->base1 = 0x0000;
+ desc->type = SEG_TYPE_TSS;
+ desc->s = 0;
+ desc->dpl = 0;
+ desc->p = 1;
+ desc->limit = 0x0;
+ desc->avl = 0;
+ desc->l = 0;
+ desc->d = 0;
+ desc->g = SEG_GRANULARITY_4KB;
+ desc->base2 = 0x00;
+#endif /* CONFIG_X86_64 */
+
+ asm volatile ("lidt %0" : : "m" (*idt));
+ asm volatile ("lgdt %0" : : "m" (*gdt));
+
+ asm volatile("cli");
+
+ return boot_params;
+fail:
+ return NULL;
+}
diff --git a/arch/x86/boot/compressed/eboot.h b/arch/x86/boot/compressed/eboot.h
new file mode 100644
index 000000000000..39251663e65b
--- /dev/null
+++ b/arch/x86/boot/compressed/eboot.h
@@ -0,0 +1,61 @@
+#ifndef BOOT_COMPRESSED_EBOOT_H
+#define BOOT_COMPRESSED_EBOOT_H
+
+#define SEG_TYPE_DATA (0 << 3)
+#define SEG_TYPE_READ_WRITE (1 << 1)
+#define SEG_TYPE_CODE (1 << 3)
+#define SEG_TYPE_EXEC_READ (1 << 1)
+#define SEG_TYPE_TSS ((1 << 3) | (1 << 0))
+#define SEG_OP_SIZE_32BIT (1 << 0)
+#define SEG_GRANULARITY_4KB (1 << 0)
+
+#define DESC_TYPE_CODE_DATA (1 << 0)
+
+#define EFI_PAGE_SIZE (1UL << EFI_PAGE_SHIFT)
+#define EFI_READ_CHUNK_SIZE (1024 * 1024)
+
+#define PIXEL_RGB_RESERVED_8BIT_PER_COLOR 0
+#define PIXEL_BGR_RESERVED_8BIT_PER_COLOR 1
+#define PIXEL_BIT_MASK 2
+#define PIXEL_BLT_ONLY 3
+#define PIXEL_FORMAT_MAX 4
+
+struct efi_pixel_bitmask {
+ u32 red_mask;
+ u32 green_mask;
+ u32 blue_mask;
+ u32 reserved_mask;
+};
+
+struct efi_graphics_output_mode_info {
+ u32 version;
+ u32 horizontal_resolution;
+ u32 vertical_resolution;
+ int pixel_format;
+ struct efi_pixel_bitmask pixel_information;
+ u32 pixels_per_scan_line;
+} __packed;
+
+struct efi_graphics_output_protocol_mode {
+ u32 max_mode;
+ u32 mode;
+ unsigned long info;
+ unsigned long size_of_info;
+ u64 frame_buffer_base;
+ unsigned long frame_buffer_size;
+} __packed;
+
+struct efi_graphics_output_protocol {
+ void *query_mode;
+ unsigned long set_mode;
+ unsigned long blt;
+ struct efi_graphics_output_protocol_mode *mode;
+};
+
+struct efi_uga_draw_protocol {
+ void *get_mode;
+ void *set_mode;
+ void *blt;
+};
+
+#endif /* BOOT_COMPRESSED_EBOOT_H */
diff --git a/arch/x86/boot/compressed/efi_stub_32.S b/arch/x86/boot/compressed/efi_stub_32.S
new file mode 100644
index 000000000000..a53440e81d52
--- /dev/null
+++ b/arch/x86/boot/compressed/efi_stub_32.S
@@ -0,0 +1,86 @@
+/*
+ * EFI call stub for IA32.
+ *
+ * This stub allows us to make EFI calls in physical mode with interrupts
+ * turned off. Note that this implementation is different from the one in
+ * arch/x86/platform/efi/efi_stub_32.S because we're _already_ in physical
+ * mode at this point.
+ */
+
+#include <linux/linkage.h>
+#include <asm/page_types.h>
+
+/*
+ * efi_call_phys(void *, ...) is a function with variable parameters.
+ * All the callers of this function assure that all the parameters are 4-bytes.
+ */
+
+/*
+ * In gcc calling convention, EBX, ESP, EBP, ESI and EDI are all callee save.
+ * So we'd better save all of them at the beginning of this function and restore
+ * at the end no matter how many we use, because we can not assure EFI runtime
+ * service functions will comply with gcc calling convention, too.
+ */
+
+.text
+ENTRY(efi_call_phys)
+ /*
+ * 0. The function can only be called in Linux kernel. So CS has been
+ * set to 0x0010, DS and SS have been set to 0x0018. In EFI, I found
+ * the values of these registers are the same. And, the corresponding
+ * GDT entries are identical. So I will do nothing about segment reg
+ * and GDT, but change GDT base register in prelog and epilog.
+ */
+
+ /*
+ * 1. Because we haven't been relocated by this point we need to
+ * use relative addressing.
+ */
+ call 1f
+1: popl %edx
+ subl $1b, %edx
+
+ /*
+ * 2. Now on the top of stack is the return
+ * address in the caller of efi_call_phys(), then parameter 1,
+ * parameter 2, ..., param n. To make things easy, we save the return
+ * address of efi_call_phys in a global variable.
+ */
+ popl %ecx
+ movl %ecx, saved_return_addr(%edx)
+ /* get the function pointer into ECX*/
+ popl %ecx
+ movl %ecx, efi_rt_function_ptr(%edx)
+
+ /*
+ * 3. Call the physical function.
+ */
+ call *%ecx
+
+ /*
+ * 4. Balance the stack. And because EAX contain the return value,
+ * we'd better not clobber it. We need to calculate our address
+ * again because %ecx and %edx are not preserved across EFI function
+ * calls.
+ */
+ call 1f
+1: popl %edx
+ subl $1b, %edx
+
+ movl efi_rt_function_ptr(%edx), %ecx
+ pushl %ecx
+
+ /*
+ * 10. Push the saved return address onto the stack and return.
+ */
+ movl saved_return_addr(%edx), %ecx
+ pushl %ecx
+ ret
+ENDPROC(efi_call_phys)
+.previous
+
+.data
+saved_return_addr:
+ .long 0
+efi_rt_function_ptr:
+ .long 0
diff --git a/arch/x86/boot/compressed/efi_stub_64.S b/arch/x86/boot/compressed/efi_stub_64.S
new file mode 100644
index 000000000000..cedc60de86eb
--- /dev/null
+++ b/arch/x86/boot/compressed/efi_stub_64.S
@@ -0,0 +1 @@
+#include "../../platform/efi/efi_stub_64.S"
diff --git a/arch/x86/boot/compressed/head_32.S b/arch/x86/boot/compressed/head_32.S
index 67a655a39ce4..a0559930a180 100644
--- a/arch/x86/boot/compressed/head_32.S
+++ b/arch/x86/boot/compressed/head_32.S
@@ -32,6 +32,28 @@
__HEAD
ENTRY(startup_32)
+#ifdef CONFIG_EFI_STUB
+ /*
+ * We don't need the return address, so set up the stack so
+ * efi_main() can find its arugments.
+ */
+ add $0x4, %esp
+
+ call efi_main
+ cmpl $0, %eax
+ je preferred_addr
+ movl %eax, %esi
+ call 1f
+1:
+ popl %eax
+ subl $1b, %eax
+ subl BP_pref_address(%esi), %eax
+ add BP_code32_start(%esi), %eax
+ leal preferred_addr(%eax), %eax
+ jmp *%eax
+
+preferred_addr:
+#endif
cld
/*
* Test KEEP_SEGMENTS flag to see if the bootloader is asking
diff --git a/arch/x86/boot/compressed/head_64.S b/arch/x86/boot/compressed/head_64.S
index 35af09d13dc1..558d76ce23bc 100644
--- a/arch/x86/boot/compressed/head_64.S
+++ b/arch/x86/boot/compressed/head_64.S
@@ -199,6 +199,26 @@ ENTRY(startup_64)
* an identity mapped page table being provied that maps our
* entire text+data+bss and hopefully all of memory.
*/
+#ifdef CONFIG_EFI_STUB
+ pushq %rsi
+ mov %rcx, %rdi
+ mov %rdx, %rsi
+ call efi_main
+ popq %rsi
+ cmpq $0,%rax
+ je preferred_addr
+ movq %rax,%rsi
+ call 1f
+1:
+ popq %rax
+ subq $1b, %rax
+ subq BP_pref_address(%rsi), %rax
+ add BP_code32_start(%esi), %eax
+ leaq preferred_addr(%rax), %rax
+ jmp *%rax
+
+preferred_addr:
+#endif
/* Setup data segments. */
xorl %eax, %eax
diff --git a/arch/x86/boot/compressed/string.c b/arch/x86/boot/compressed/string.c
index 19b3e693cd72..ffb9c5c9d748 100644
--- a/arch/x86/boot/compressed/string.c
+++ b/arch/x86/boot/compressed/string.c
@@ -1,2 +1,11 @@
#include "misc.h"
+
+int memcmp(const void *s1, const void *s2, size_t len)
+{
+ u8 diff;
+ asm("repe; cmpsb; setnz %0"
+ : "=qm" (diff), "+D" (s1), "+S" (s2), "+c" (len));
+ return diff;
+}
+
#include "../string.c"
diff --git a/arch/x86/boot/header.S b/arch/x86/boot/header.S
index bdb4d458ec8c..f1bbeeb09148 100644
--- a/arch/x86/boot/header.S
+++ b/arch/x86/boot/header.S
@@ -45,6 +45,11 @@ SYSSEG = 0x1000 /* historical load address >> 4 */
.global bootsect_start
bootsect_start:
+#ifdef CONFIG_EFI_STUB
+ # "MZ", MS-DOS header
+ .byte 0x4d
+ .byte 0x5a
+#endif
# Normalize the start address
ljmp $BOOTSEG, $start2
@@ -79,6 +84,14 @@ bs_die:
# invoke the BIOS reset code...
ljmp $0xf000,$0xfff0
+#ifdef CONFIG_EFI_STUB
+ .org 0x3c
+ #
+ # Offset to the PE header.
+ #
+ .long pe_header
+#endif /* CONFIG_EFI_STUB */
+
.section ".bsdata", "a"
bugger_off_msg:
.ascii "Direct booting from floppy is no longer supported.\r\n"
@@ -87,6 +100,141 @@ bugger_off_msg:
.ascii "Remove disk and press any key to reboot . . .\r\n"
.byte 0
+#ifdef CONFIG_EFI_STUB
+pe_header:
+ .ascii "PE"
+ .word 0
+
+coff_header:
+#ifdef CONFIG_X86_32
+ .word 0x14c # i386
+#else
+ .word 0x8664 # x86-64
+#endif
+ .word 2 # nr_sections
+ .long 0 # TimeDateStamp
+ .long 0 # PointerToSymbolTable
+ .long 1 # NumberOfSymbols
+ .word section_table - optional_header # SizeOfOptionalHeader
+#ifdef CONFIG_X86_32
+ .word 0x306 # Characteristics.
+ # IMAGE_FILE_32BIT_MACHINE |
+ # IMAGE_FILE_DEBUG_STRIPPED |
+ # IMAGE_FILE_EXECUTABLE_IMAGE |
+ # IMAGE_FILE_LINE_NUMS_STRIPPED
+#else
+ .word 0x206 # Characteristics
+ # IMAGE_FILE_DEBUG_STRIPPED |
+ # IMAGE_FILE_EXECUTABLE_IMAGE |
+ # IMAGE_FILE_LINE_NUMS_STRIPPED
+#endif
+
+optional_header:
+#ifdef CONFIG_X86_32
+ .word 0x10b # PE32 format
+#else
+ .word 0x20b # PE32+ format
+#endif
+ .byte 0x02 # MajorLinkerVersion
+ .byte 0x14 # MinorLinkerVersion
+
+ # Filled in by build.c
+ .long 0 # SizeOfCode
+
+ .long 0 # SizeOfInitializedData
+ .long 0 # SizeOfUninitializedData
+
+ # Filled in by build.c
+ .long 0x0000 # AddressOfEntryPoint
+
+ .long 0x0000 # BaseOfCode
+#ifdef CONFIG_X86_32
+ .long 0 # data
+#endif
+
+extra_header_fields:
+#ifdef CONFIG_X86_32
+ .long 0 # ImageBase
+#else
+ .quad 0 # ImageBase
+#endif
+ .long 0x1000 # SectionAlignment
+ .long 0x200 # FileAlignment
+ .word 0 # MajorOperatingSystemVersion
+ .word 0 # MinorOperatingSystemVersion
+ .word 0 # MajorImageVersion
+ .word 0 # MinorImageVersion
+ .word 0 # MajorSubsystemVersion
+ .word 0 # MinorSubsystemVersion
+ .long 0 # Win32VersionValue
+
+ #
+ # The size of the bzImage is written in tools/build.c
+ #
+ .long 0 # SizeOfImage
+
+ .long 0x200 # SizeOfHeaders
+ .long 0 # CheckSum
+ .word 0xa # Subsystem (EFI application)
+ .word 0 # DllCharacteristics
+#ifdef CONFIG_X86_32
+ .long 0 # SizeOfStackReserve
+ .long 0 # SizeOfStackCommit
+ .long 0 # SizeOfHeapReserve
+ .long 0 # SizeOfHeapCommit
+#else
+ .quad 0 # SizeOfStackReserve
+ .quad 0 # SizeOfStackCommit
+ .quad 0 # SizeOfHeapReserve
+ .quad 0 # SizeOfHeapCommit
+#endif
+ .long 0 # LoaderFlags
+ .long 0x1 # NumberOfRvaAndSizes
+
+ .quad 0 # ExportTable
+ .quad 0 # ImportTable
+ .quad 0 # ResourceTable
+ .quad 0 # ExceptionTable
+ .quad 0 # CertificationTable
+ .quad 0 # BaseRelocationTable
+
+ # Section table
+section_table:
+ .ascii ".text"
+ .byte 0
+ .byte 0
+ .byte 0
+ .long 0
+ .long 0x0 # startup_{32,64}
+ .long 0 # Size of initialized data
+ # on disk
+ .long 0x0 # startup_{32,64}
+ .long 0 # PointerToRelocations
+ .long 0 # PointerToLineNumbers
+ .word 0 # NumberOfRelocations
+ .word 0 # NumberOfLineNumbers
+ .long 0x60500020 # Characteristics (section flags)
+
+ #
+ # The EFI application loader requires a relocation section
+ # because EFI applications are relocatable and not having
+ # this section seems to confuse it. But since we don't need
+ # the loader to fixup any relocs for us just fill it with a
+ # single dummy reloc.
+ #
+ .ascii ".reloc"
+ .byte 0
+ .byte 0
+ .long reloc_end - reloc_start
+ .long reloc_start
+ .long reloc_end - reloc_start # SizeOfRawData
+ .long reloc_start # PointerToRawData
+ .long 0 # PointerToRelocations
+ .long 0 # PointerToLineNumbers
+ .word 0 # NumberOfRelocations
+ .word 0 # NumberOfLineNumbers
+ .long 0x42100040 # Characteristics (section flags)
+#endif /* CONFIG_EFI_STUB */
# Kernel attributes; used by setup. This is part 1 of the
# header, from the old boot sector.
@@ -318,3 +466,13 @@ die:
setup_corrupt:
.byte 7
.string "No setup signature found...\n"
+
+ .data
+dummy: .long 0
+
+ .section .reloc
+reloc_start:
+ .long dummy - reloc_start
+ .long 10
+ .word 0
+reloc_end:
diff --git a/arch/x86/boot/string.c b/arch/x86/boot/string.c
index 3cbc4058dd26..574dedfe2890 100644
--- a/arch/x86/boot/string.c
+++ b/arch/x86/boot/string.c
@@ -111,3 +111,38 @@ unsigned long long simple_strtoull(const char *cp, char **endp, unsigned int bas
return result;
}
+
+/**
+ * strlen - Find the length of a string
+ * @s: The string to be sized
+ */
+size_t strlen(const char *s)
+{
+ const char *sc;
+
+ for (sc = s; *sc != '\0'; ++sc)
+ /* nothing */;
+ return sc - s;
+}
+
+/**
+ * strstr - Find the first substring in a %NUL terminated string
+ * @s1: The string to be searched
+ * @s2: The string to search for
+ */
+char *strstr(const char *s1, const char *s2)
+{
+ size_t l1, l2;
+
+ l2 = strlen(s2);
+ if (!l2)
+ return (char *)s1;
+ l1 = strlen(s1);
+ while (l1 >= l2) {
+ l1--;
+ if (!memcmp(s1, s2, l2))
+ return (char *)s1;
+ s1++;
+ }
+ return NULL;
+}
diff --git a/arch/x86/boot/tools/build.c b/arch/x86/boot/tools/build.c
index fdc60a0b3c20..4e9bd6bcafa6 100644
--- a/arch/x86/boot/tools/build.c
+++ b/arch/x86/boot/tools/build.c
@@ -135,6 +135,9 @@ static void usage(void)
int main(int argc, char ** argv)
{
+#ifdef CONFIG_EFI_STUB
+ unsigned int file_sz, pe_header;
+#endif
unsigned int i, sz, setup_sectors;
int c;
u32 sys_size;
@@ -194,6 +197,42 @@ int main(int argc, char ** argv)
buf[0x1f6] = sys_size >> 16;
buf[0x1f7] = sys_size >> 24;
+#ifdef CONFIG_EFI_STUB
+ file_sz = sz + i + ((sys_size * 16) - sz);
+
+ pe_header = *(unsigned int *)&buf[0x3c];
+
+ /* Size of code */
+ *(unsigned int *)&buf[pe_header + 0x1c] = file_sz;
+
+ /* Size of image */
+ *(unsigned int *)&buf[pe_header + 0x50] = file_sz;
+
+#ifdef CONFIG_X86_32
+ /* Address of entry point */
+ *(unsigned int *)&buf[pe_header + 0x28] = i;
+
+ /* .text size */
+ *(unsigned int *)&buf[pe_header + 0xb0] = file_sz;
+
+ /* .text size of initialised data */
+ *(unsigned int *)&buf[pe_header + 0xb8] = file_sz;
+#else
+ /*
+ * Address of entry point. startup_32 is at the beginning and
+ * the 64-bit entry point (startup_64) is always 512 bytes
+ * after.
+ */
+ *(unsigned int *)&buf[pe_header + 0x28] = i + 512;
+
+ /* .text size */
+ *(unsigned int *)&buf[pe_header + 0xc0] = file_sz;
+
+ /* .text size of initialised data */
+ *(unsigned int *)&buf[pe_header + 0xc8] = file_sz;
+#endif /* CONFIG_X86_32 */
+#endif /* CONFIG_EFI_STUB */
+
crc = partial_crc32(buf, i, crc);
if (fwrite(buf, 1, i, stdout) != i)
die("Writing setup failed");
diff --git a/arch/x86/include/asm/bootparam.h b/arch/x86/include/asm/bootparam.h
index e020d88ec02d..2f90c51cc49d 100644
--- a/arch/x86/include/asm/bootparam.h
+++ b/arch/x86/include/asm/bootparam.h
@@ -64,6 +64,8 @@ struct setup_header {
__u32 payload_offset;
__u32 payload_length;
__u64 setup_data;
+ __u64 pref_address;
+ __u32 init_size;
} __attribute__((packed));
struct sys_desc_table {
diff --git a/arch/x86/include/asm/efi.h b/arch/x86/include/asm/efi.h
index 7093e4a6a0bc..844f735fd63a 100644
--- a/arch/x86/include/asm/efi.h
+++ b/arch/x86/include/asm/efi.h
@@ -3,6 +3,8 @@
#ifdef CONFIG_X86_32
+#define EFI_LOADER_SIGNATURE "EL32"
+
extern unsigned long asmlinkage efi_call_phys(void *, ...);
#define efi_call_phys0(f) efi_call_phys(f)
@@ -37,6 +39,8 @@ extern unsigned long asmlinkage efi_call_phys(void *, ...);
#else /* !CONFIG_X86_32 */
+#define EFI_LOADER_SIGNATURE "EL64"
+
extern u64 efi_call0(void *fp);
extern u64 efi_call1(void *fp, u64 arg1);
extern u64 efi_call2(void *fp, u64 arg1, u64 arg2);
diff --git a/arch/x86/kernel/asm-offsets.c b/arch/x86/kernel/asm-offsets.c
index 4f13fafc5264..68de2dc962ec 100644
--- a/arch/x86/kernel/asm-offsets.c
+++ b/arch/x86/kernel/asm-offsets.c
@@ -67,4 +67,6 @@ void common(void) {
OFFSET(BP_hardware_subarch, boot_params, hdr.hardware_subarch);
OFFSET(BP_version, boot_params, hdr.version);
OFFSET(BP_kernel_alignment, boot_params, hdr.kernel_alignment);
+ OFFSET(BP_pref_address, boot_params, hdr.pref_address);
+ OFFSET(BP_code32_start, boot_params, hdr.code32_start);
}
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index d05444ac2aea..d7d5099fe874 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -749,12 +749,7 @@ void __init setup_arch(char **cmdline_p)
#endif
#ifdef CONFIG_EFI
if (!strncmp((char *)&boot_params.efi_info.efi_loader_signature,
-#ifdef CONFIG_X86_32
- "EL32",
-#else
- "EL64",
-#endif
- 4)) {
+ EFI_LOADER_SIGNATURE, 4)) {
efi_enabled = 1;
efi_memblock_x86_reserve_range();
}
diff --git a/include/linux/efi.h b/include/linux/efi.h
index 2362a0bc7f0d..37c300712e02 100644
--- a/include/linux/efi.h
+++ b/include/linux/efi.h
@@ -109,6 +109,14 @@ typedef struct {
u32 imagesize;
} efi_capsule_header_t;
+/*
+ * Allocation types for calls to boottime->allocate_pages.
+ */
+#define EFI_ALLOCATE_ANY_PAGES 0
+#define EFI_ALLOCATE_MAX_ADDRESS 1
+#define EFI_ALLOCATE_ADDRESS 2
+#define EFI_MAX_ALLOCATE_TYPE 3
+
typedef int (*efi_freemem_callback_t) (u64 start, u64 end, void *arg);
/*
@@ -139,6 +147,57 @@ typedef struct {
} efi_time_cap_t;
/*
+ * EFI Boot Services table
+ */
+typedef struct {
+ efi_table_hdr_t hdr;
+ void *raise_tpl;
+ void *restore_tpl;
+ void *allocate_pages;
+ void *free_pages;
+ void *get_memory_map;
+ void *allocate_pool;
+ void *free_pool;
+ void *create_event;
+ void *set_timer;
+ void *wait_for_event;
+ void *signal_event;
+ void *close_event;
+ void *check_event;
+ void *install_protocol_interface;
+ void *reinstall_protocol_interface;
+ void *uninstall_protocol_interface;
+ void *handle_protocol;
+ void *__reserved;
+ void *register_protocol_notify;
+ void *locate_handle;
+ void *locate_device_path;
+ void *install_configuration_table;
+ void *load_image;
+ void *start_image;
+ void *exit;
+ void *unload_image;
+ void *exit_boot_services;
+ void *get_next_monotonic_count;
+ void *stall;
+ void *set_watchdog_timer;
+ void *connect_controller;
+ void *disconnect_controller;
+ void *open_protocol;
+ void *close_protocol;
+ void *open_protocol_information;
+ void *protocols_per_handle;
+ void *locate_handle_buffer;
+ void *locate_protocol;
+ void *install_multiple_protocol_interfaces;
+ void *uninstall_multiple_protocol_interfaces;
+ void *calculate_crc32;
+ void *copy_mem;
+ void *set_mem;
+ void *create_event_ex;
+} efi_boot_services_t;
+
+/*
* Types and defines for EFI ResetSystem
*/
#define EFI_RESET_COLD 0
@@ -236,6 +295,24 @@ typedef efi_status_t efi_query_capsule_caps_t(efi_capsule_header_t **capsules,
#define LINUX_EFI_CRASH_GUID \
EFI_GUID( 0xcfc8fc79, 0xbe2e, 0x4ddc, 0x97, 0xf0, 0x9f, 0x98, 0xbf, 0xe2, 0x98, 0xa0 )
+#define LOADED_IMAGE_PROTOCOL_GUID \
+ EFI_GUID( 0x5b1b31a1, 0x9562, 0x11d2, 0x8e, 0x3f, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b )
+
+#define EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID \
+ EFI_GUID( 0x9042a9de, 0x23dc, 0x4a38, 0x96, 0xfb, 0x7a, 0xde, 0xd0, 0x80, 0x51, 0x6a )
+
+#define EFI_UGA_PROTOCOL_GUID \
+ EFI_GUID( 0x982c298b, 0xf4fa, 0x41cb, 0xb8, 0x38, 0x77, 0xaa, 0x68, 0x8f, 0xb8, 0x39 )
+
+#define EFI_PCI_IO_PROTOCOL_GUID \
+ EFI_GUID( 0x4cf5b200, 0x68b8, 0x4ca5, 0x9e, 0xec, 0xb2, 0x3e, 0x3f, 0x50, 0x2, 0x9a )
+
+#define EFI_FILE_INFO_ID \
+ EFI_GUID( 0x9576e92, 0x6d3f, 0x11d2, 0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b )
+
+#define EFI_FILE_SYSTEM_GUID \
+ EFI_GUID( 0x964e5b22, 0x6459, 0x11d2, 0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b )
+
typedef struct {
efi_guid_t guid;
unsigned long table;
@@ -261,7 +338,7 @@ typedef struct {
unsigned long stderr_handle;
unsigned long stderr;
efi_runtime_services_t *runtime;
- unsigned long boottime;
+ efi_boot_services_t *boottime;
unsigned long nr_tables;
unsigned long tables;
} efi_system_table_t;
@@ -275,6 +352,56 @@ struct efi_memory_map {
unsigned long desc_size;
};
+typedef struct {
+ u32 revision;
+ void *parent_handle;
+ efi_system_table_t *system_table;
+ void *device_handle;
+ void *file_path;
+ void *reserved;
+ u32 load_options_size;
+ void *load_options;
+ void *image_base;
+ __aligned_u64 image_size;
+ unsigned int image_code_type;
+ unsigned int image_data_type;
+ unsigned long unload;
+} efi_loaded_image_t;
+
+typedef struct {
+ u64 revision;
+ void *open_volume;
+} efi_file_io_interface_t;
+
+typedef struct {
+ u64 size;
+ u64 file_size;
+ u64 phys_size;
+ efi_time_t create_time;
+ efi_time_t last_access_time;
+ efi_time_t modification_time;
+ __aligned_u64 attribute;
+ efi_char16_t filename[1];
+} efi_file_info_t;
+
+typedef struct {
+ u64 revision;
+ void *open;
+ void *close;
+ void *delete;
+ void *read;
+ void *write;
+ void *get_position;
+ void *set_position;
+ void *get_info;
+ void *set_info;
+ void *flush;
+} efi_file_handle_t;
+
+#define EFI_FILE_MODE_READ 0x0000000000000001
+#define EFI_FILE_MODE_WRITE 0x0000000000000002
+#define EFI_FILE_MODE_CREATE 0x8000000000000000
+
#define EFI_INVALID_TABLE_ADDR (~0UL)
/*
@@ -385,6 +512,13 @@ extern int __init efi_setup_pcdp_console(char *);
#define EFI_VARIABLE_RUNTIME_ACCESS 0x0000000000000004
/*
+ * The type of search to perform when calling boottime->locate_handle
+ */
+#define EFI_LOCATE_ALL_HANDLES 0
+#define EFI_LOCATE_BY_REGISTER_NOTIFY 1
+#define EFI_LOCATE_BY_PROTOCOL 2
+
+/*
* EFI Device Path information
*/
#define EFI_DEV_HW 0x01
generated by cgit v1.2.3 (git 2.39.0) at 2025-11-04 07:44:13 +0300