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Commit 7721da4c authored by Roy Franz's avatar Roy Franz Committed by Matt Fleming
Browse files

efi: Move common EFI stub code from x86 arch code to common location 



No code changes made, just moving functions and #define from x86 arch
directory to common location.  Code is shared using #include, similar
to how decompression code is shared among architectures.

Signed-off-by: default avatarRoy Franz <roy.franz@linaro.org>
Acked-by: default avatarMark Salter <msalter@redhat.com>
Reviewed-by: default avatarGrant Likely <grant.likely@linaro.org>
Signed-off-by: default avatarMatt Fleming <matt.fleming@intel.com>
parent ed37ddff

arch/x86/boot/compressed/eboot.c

+1 −441
Original line number Diff line number Diff line
@@ -19,214 +19,10 @@ 


static efi_system_table_t *sys_table;



static void efi_char16_printk(efi_char16_t *str)

{

	struct efi_simple_text_output_protocol *out;



	out = (struct efi_simple_text_output_protocol *)sys_table->con_out;

	efi_call_phys2(out->output_string, out, str);

}



static void efi_printk(char *str)

{

	char *s8;



	for (s8 = str; *s8; s8++) {

		efi_char16_t ch[2] = { 0 };



		ch[0] = *s8;

		if (*s8 == '\n') {

			efi_char16_t nl[2] = { '\r', 0 };

			efi_char16_printk(nl);

		}



		efi_char16_printk(ch);

	}

}



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;

#include "../../../../drivers/firmware/efi/efi-stub-helper.c"



	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, nr_pages);

}



static void find_bits(unsigned long mask, u8 *pos, u8 *size)

{
@@ -624,242 +420,6 @@ void setup_graphics(struct boot_params *boot_params) 
	}

}



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) {

		efi_printk("Failed to alloc mem for initrds\n");

		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_16[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_16;



		/* Skip any leading slashes */

		while (*str == '/' || *str == '\\')

			str++;



		while (*str && *str != ' ' && *str != '\n') {

			if ((u8 *)p >= (u8 *)filename_16 + sizeof(filename_16))

				break;



			if (*str == '/') {

				*p++ = '\\';

				*str++;

			} else {

				*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) {

				efi_printk("Failed to handle fs_proto\n");

				goto free_initrds;

			}



			status = efi_call_phys2(io->open_volume, io, &fh);

			if (status != EFI_SUCCESS) {

				efi_printk("Failed to open volume\n");

				goto free_initrds;

			}

		}



		status = efi_call_phys5(fh->open, fh, &h, filename_16,

					EFI_FILE_MODE_READ, (u64)0);

		if (status != EFI_SUCCESS) {

			efi_printk("Failed to open initrd file: ");

			efi_char16_printk(filename_16);

			efi_printk("\n");

			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) {

			efi_printk("Failed to get initrd info size\n");

			goto close_handles;

		}



grow:

		status = efi_call_phys3(sys_table->boottime->allocate_pool,

					EFI_LOADER_DATA, info_sz, &info);

		if (status != EFI_SUCCESS) {

			efi_printk("Failed to alloc mem for initrd info\n");

			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) {

			efi_printk("Failed to get initrd info\n");

			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) {

			efi_printk("Failed to alloc highmem for initrds\n");

			goto close_handles;

		}



		/* We've run out of free low memory. */

		if (initrd_addr > hdr->initrd_addr_max) {

			efi_printk("We've run out of free low memory\n");

			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) {

					efi_printk("Failed to read initrd\n");

					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 < i; 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

arch/x86/boot/compressed/eboot.h

+0 −1
Original line number Diff line number Diff line
@@ -10,7 +10,6 @@ 
#define SEG_GRANULARITY_4KB	(1 << 0)



#define DESC_TYPE_CODE_DATA	(1 << 0)

#define EFI_READ_CHUNK_SIZE	(1024 * 1024)



#define EFI_CONSOLE_OUT_DEVICE_GUID    \

	EFI_GUID(0xd3b36f2c, 0xd551, 0x11d4, 0x9a, 0x46, 0x0, 0x90, 0x27, \

drivers/firmware/efi/efi-stub-helper.c

0 → 100644
+463 −0
Original line number Diff line number Diff line 
/*

 * Helper functions used by the EFI stub on multiple

 * architectures. This should be #included by the EFI stub

 * implementation files.

 *

 * 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.

 *

 */

#define EFI_READ_CHUNK_SIZE	(1024 * 1024)



struct initrd {

	efi_file_handle_t *handle;

	u64 size;

};









static void efi_char16_printk(efi_char16_t *str)

{

	struct efi_simple_text_output_protocol *out;



	out = (struct efi_simple_text_output_protocol *)sys_table->con_out;

	efi_call_phys2(out->output_string, out, str);

}



static void efi_printk(char *str)

{

	char *s8;



	for (s8 = str; *s8; s8++) {

		efi_char16_t ch[2] = { 0 };



		ch[0] = *s8;

		if (*s8 == '\n') {

			efi_char16_t nl[2] = { '\r', 0 };

			efi_char16_printk(nl);

		}



		efi_char16_printk(ch);

	}

}





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, nr_pages);

}





/*

 * 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) {

		efi_printk("Failed to alloc mem for initrds\n");

		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_16[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_16;



		/* Skip any leading slashes */

		while (*str == '/' || *str == '\\')

			str++;



		while (*str && *str != ' ' && *str != '\n') {

			if ((u8 *)p >= (u8 *)filename_16 + sizeof(filename_16))

				break;



			if (*str == '/') {

				*p++ = '\\';

				*str++;

			} else {

				*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) {

				efi_printk("Failed to handle fs_proto\n");

				goto free_initrds;

			}



			status = efi_call_phys2(io->open_volume, io, &fh);

			if (status != EFI_SUCCESS) {

				efi_printk("Failed to open volume\n");

				goto free_initrds;

			}

		}



		status = efi_call_phys5(fh->open, fh, &h, filename_16,

					EFI_FILE_MODE_READ, (u64)0);

		if (status != EFI_SUCCESS) {

			efi_printk("Failed to open initrd file: ");

			efi_char16_printk(filename_16);

			efi_printk("\n");

			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) {

			efi_printk("Failed to get initrd info size\n");

			goto close_handles;

		}



grow:

		status = efi_call_phys3(sys_table->boottime->allocate_pool,

					EFI_LOADER_DATA, info_sz, &info);

		if (status != EFI_SUCCESS) {

			efi_printk("Failed to alloc mem for initrd info\n");

			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) {

			efi_printk("Failed to get initrd info\n");

			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) {

			efi_printk("Failed to alloc highmem for initrds\n");

			goto close_handles;

		}



		/* We've run out of free low memory. */

		if (initrd_addr > hdr->initrd_addr_max) {

			efi_printk("We've run out of free low memory\n");

			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) {

					efi_printk("Failed to read initrd\n");

					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 < i; 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;

}