1 files changed, 0 insertions, 634 deletions

diff --git a/drivers/firmware/efi/efi-stub-helper.c b/drivers/firmware/efi/efi-stub-helper.c
deleted file mode 100644
index eb6d4be9e722..000000000000
--- a/drivers/firmware/efi/efi-stub-helper.c
+++ /dev/null
@@ -1,634 +0,0 @@
-/*
- * 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)
-
-/* error code which can't be mistaken for valid address */
-#define EFI_ERROR	(~0UL)
-
-
-struct file_info {
-	efi_file_handle_t *handle;
-	u64 size;
-};
-
-static void efi_printk(efi_system_table_t *sys_table_arg, 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(sys_table_arg, nl);
-		}
-
-		efi_char16_printk(sys_table_arg, ch);
-	}
-}
-
-#define pr_efi(sys_table, msg)     efi_printk(sys_table, "EFI stub: "msg)
-#define pr_efi_err(sys_table, msg) efi_printk(sys_table, "EFI stub: ERROR: "msg)
-
-
-static efi_status_t efi_get_memory_map(efi_system_table_t *sys_table_arg,
-				       efi_memory_desc_t **map,
-				       unsigned long *map_size,
-				       unsigned long *desc_size,
-				       u32 *desc_ver,
-				       unsigned long *key_ptr)
-{
-	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_early(allocate_pool, EFI_LOADER_DATA,
-				*map_size, (void **)&m);
-	if (status != EFI_SUCCESS)
-		goto fail;
-
-	*desc_size = 0;
-	key = 0;
-	status = efi_call_early(get_memory_map, map_size, m,
-				&key, desc_size, &desc_version);
-	if (status == EFI_BUFFER_TOO_SMALL) {
-		efi_call_early(free_pool, m);
-		goto again;
-	}
-
-	if (status != EFI_SUCCESS)
-		efi_call_early(free_pool, m);
-
-	if (key_ptr && status == EFI_SUCCESS)
-		*key_ptr = key;
-	if (desc_ver && status == EFI_SUCCESS)
-		*desc_ver = desc_version;
-
-fail:
-	*map = m;
-	return status;
-}
-
-
-static unsigned long __init get_dram_base(efi_system_table_t *sys_table_arg)
-{
-	efi_status_t status;
-	unsigned long map_size;
-	unsigned long membase  = EFI_ERROR;
-	struct efi_memory_map map;
-	efi_memory_desc_t *md;
-
-	status = efi_get_memory_map(sys_table_arg, (efi_memory_desc_t **)&map.map,
-				    &map_size, &map.desc_size, NULL, NULL);
-	if (status != EFI_SUCCESS)
-		return membase;
-
-	map.map_end = map.map + map_size;
-
-	for_each_efi_memory_desc(&map, md)
-		if (md->attribute & EFI_MEMORY_WB)
-			if (membase > md->phys_addr)
-				membase = md->phys_addr;
-
-	efi_call_early(free_pool, map.map);
-
-	return membase;
-}
-
-/*
- * Allocate at the highest possible address that is not above 'max'.
- */
-static efi_status_t efi_high_alloc(efi_system_table_t *sys_table_arg,
-			       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 = efi_get_memory_map(sys_table_arg, &map, &map_size, &desc_size,
-				    NULL, NULL);
-	if (status != EFI_SUCCESS)
-		goto fail;
-
-	/*
-	 * Enforce minimum alignment that EFI requires when requesting
-	 * a specific address.  We are doing page-based allocations,
-	 * so we must be aligned to a page.
-	 */
-	if (align < EFI_PAGE_SIZE)
-		align = EFI_PAGE_SIZE;
-
-	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_early(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;
-	}
-
-	efi_call_early(free_pool, map);
-fail:
-	return status;
-}
-
-/*
- * Allocate at the lowest possible address.
- */
-static efi_status_t efi_low_alloc(efi_system_table_t *sys_table_arg,
-			      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 = efi_get_memory_map(sys_table_arg, &map, &map_size, &desc_size,
-				    NULL, NULL);
-	if (status != EFI_SUCCESS)
-		goto fail;
-
-	/*
-	 * Enforce minimum alignment that EFI requires when requesting
-	 * a specific address.  We are doing page-based allocations,
-	 * so we must be aligned to a page.
-	 */
-	if (align < EFI_PAGE_SIZE)
-		align = EFI_PAGE_SIZE;
-
-	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_early(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;
-
-	efi_call_early(free_pool, map);
-fail:
-	return status;
-}
-
-static void efi_free(efi_system_table_t *sys_table_arg, unsigned long size,
-		     unsigned long addr)
-{
-	unsigned long nr_pages;
-
-	if (!size)
-		return;
-
-	nr_pages = round_up(size, EFI_PAGE_SIZE) / EFI_PAGE_SIZE;
-	efi_call_early(free_pages, addr, nr_pages);
-}
-
-
-/*
- * Check the cmdline for a LILO-style file= arguments.
- *
- * We only support loading a file from the same filesystem as
- * the kernel image.
- */
-static efi_status_t handle_cmdline_files(efi_system_table_t *sys_table_arg,
-					 efi_loaded_image_t *image,
-					 char *cmd_line, char *option_string,
-					 unsigned long max_addr,
-					 unsigned long *load_addr,
-					 unsigned long *load_size)
-{
-	struct file_info *files;
-	unsigned long file_addr;
-	u64 file_size_total;
-	efi_file_handle_t *fh = NULL;
-	efi_status_t status;
-	int nr_files;
-	char *str;
-	int i, j, k;
-
-	file_addr = 0;
-	file_size_total = 0;
-
-	str = cmd_line;
-
-	j = 0;			/* See close_handles */
-
-	if (!load_addr || !load_size)
-		return EFI_INVALID_PARAMETER;
-
-	*load_addr = 0;
-	*load_size = 0;
-
-	if (!str || !*str)
-		return EFI_SUCCESS;
-
-	for (nr_files = 0; *str; nr_files++) {
-		str = strstr(str, option_string);
-		if (!str)
-			break;
-
-		str += strlen(option_string);
-
-		/* Skip any leading slashes */
-		while (*str == '/' || *str == '\\')
-			str++;
-
-		while (*str && *str != ' ' && *str != '\n')
-			str++;
-	}
-
-	if (!nr_files)
-		return EFI_SUCCESS;
-
-	status = efi_call_early(allocate_pool, EFI_LOADER_DATA,
-				nr_files * sizeof(*files), (void **)&files);
-	if (status != EFI_SUCCESS) {
-		pr_efi_err(sys_table_arg, "Failed to alloc mem for file handle list\n");
-		goto fail;
-	}
-
-	str = cmd_line;
-	for (i = 0; i < nr_files; i++) {
-		struct file_info *file;
-		efi_char16_t filename_16[256];
-		efi_char16_t *p;
-
-		str = strstr(str, option_string);
-		if (!str)
-			break;
-
-		str += strlen(option_string);
-
-		file = &files[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) {
-			status = efi_open_volume(sys_table_arg, image,
-						 (void **)&fh);
-			if (status != EFI_SUCCESS)
-				goto free_files;
-		}
-
-		status = efi_file_size(sys_table_arg, fh, filename_16,
-				       (void **)&file->handle, &file->size);
-		if (status != EFI_SUCCESS)
-			goto close_handles;
-
-		file_size_total += file->size;
-	}
-
-	if (file_size_total) {
-		unsigned long addr;
-
-		/*
-		 * Multiple files need to be at consecutive addresses in memory,
-		 * so allocate enough memory for all the files.  This is used
-		 * for loading multiple files.
-		 */
-		status = efi_high_alloc(sys_table_arg, file_size_total, 0x1000,
-				    &file_addr, max_addr);
-		if (status != EFI_SUCCESS) {
-			pr_efi_err(sys_table_arg, "Failed to alloc highmem for files\n");
-			goto close_handles;
-		}
-
-		/* We've run out of free low memory. */
-		if (file_addr > max_addr) {
-			pr_efi_err(sys_table_arg, "We've run out of free low memory\n");
-			status = EFI_INVALID_PARAMETER;
-			goto free_file_total;
-		}
-
-		addr = file_addr;
-		for (j = 0; j < nr_files; j++) {
-			unsigned long size;
-
-			size = files[j].size;
-			while (size) {
-				unsigned long chunksize;
-				if (size > EFI_READ_CHUNK_SIZE)
-					chunksize = EFI_READ_CHUNK_SIZE;
-				else
-					chunksize = size;
-
-				status = efi_file_read(files[j].handle,
-						       &chunksize,
-						       (void *)addr);
-				if (status != EFI_SUCCESS) {
-					pr_efi_err(sys_table_arg, "Failed to read file\n");
-					goto free_file_total;
-				}
-				addr += chunksize;
-				size -= chunksize;
-			}
-
-			efi_file_close(files[j].handle);
-		}
-
-	}
-
-	efi_call_early(free_pool, files);
-
-	*load_addr = file_addr;
-	*load_size = file_size_total;
-
-	return status;
-
-free_file_total:
-	efi_free(sys_table_arg, file_size_total, file_addr);
-
-close_handles:
-	for (k = j; k < i; k++)
-		efi_file_close(files[k].handle);
-free_files:
-	efi_call_early(free_pool, files);
-fail:
-	*load_addr = 0;
-	*load_size = 0;
-
-	return status;
-}
-/*
- * Relocate a kernel image, either compressed or uncompressed.
- * In the ARM64 case, all kernel images are currently
- * uncompressed, and as such when we relocate it we need to
- * allocate additional space for the BSS segment. Any low
- * memory that this function should avoid needs to be
- * unavailable in the EFI memory map, as if the preferred
- * address is not available the lowest available address will
- * be used.
- */
-static efi_status_t efi_relocate_kernel(efi_system_table_t *sys_table_arg,
-					unsigned long *image_addr,
-					unsigned long image_size,
-					unsigned long alloc_size,
-					unsigned long preferred_addr,
-					unsigned long alignment)
-{
-	unsigned long cur_image_addr;
-	unsigned long new_addr = 0;
-	efi_status_t status;
-	unsigned long nr_pages;
-	efi_physical_addr_t efi_addr = preferred_addr;
-
-	if (!image_addr || !image_size || !alloc_size)
-		return EFI_INVALID_PARAMETER;
-	if (alloc_size < image_size)
-		return EFI_INVALID_PARAMETER;
-
-	cur_image_addr = *image_addr;
-
-	/*
-	 * The EFI firmware loader could have placed the kernel image
-	 * anywhere in memory, but the kernel has restrictions on the
-	 * max physical address it can run at.  Some architectures
-	 * also have a prefered address, so first try to relocate
-	 * to the preferred address.  If that fails, allocate as low
-	 * as possible while respecting the required alignment.
-	 */
-	nr_pages = round_up(alloc_size, EFI_PAGE_SIZE) / EFI_PAGE_SIZE;
-	status = efi_call_early(allocate_pages,
-				EFI_ALLOCATE_ADDRESS, EFI_LOADER_DATA,
-				nr_pages, &efi_addr);
-	new_addr = efi_addr;
-	/*
-	 * If preferred address allocation failed allocate as low as
-	 * possible.
-	 */
-	if (status != EFI_SUCCESS) {
-		status = efi_low_alloc(sys_table_arg, alloc_size, alignment,
-				       &new_addr);
-	}
-	if (status != EFI_SUCCESS) {
-		pr_efi_err(sys_table_arg, "Failed to allocate usable memory for kernel.\n");
-		return status;
-	}
-
-	/*
-	 * We know source/dest won't overlap since both memory ranges
-	 * have been allocated by UEFI, so we can safely use memcpy.
-	 */
-	memcpy((void *)new_addr, (void *)cur_image_addr, image_size);
-
-	/* Return the new address of the relocated image. */
-	*image_addr = new_addr;
-
-	return status;
-}
-
-/*
- * Get the number of UTF-8 bytes corresponding to an UTF-16 character.
- * This overestimates for surrogates, but that is okay.
- */
-static int efi_utf8_bytes(u16 c)
-{
-	return 1 + (c >= 0x80) + (c >= 0x800);
-}
-
-/*
- * Convert an UTF-16 string, not necessarily null terminated, to UTF-8.
- */
-static u8 *efi_utf16_to_utf8(u8 *dst, const u16 *src, int n)
-{
-	unsigned int c;
-
-	while (n--) {
-		c = *src++;
-		if (n && c >= 0xd800 && c <= 0xdbff &&
-		    *src >= 0xdc00 && *src <= 0xdfff) {
-			c = 0x10000 + ((c & 0x3ff) << 10) + (*src & 0x3ff);
-			src++;
-			n--;
-		}
-		if (c >= 0xd800 && c <= 0xdfff)
-			c = 0xfffd; /* Unmatched surrogate */
-		if (c < 0x80) {
-			*dst++ = c;
-			continue;
-		}
-		if (c < 0x800) {
-			*dst++ = 0xc0 + (c >> 6);
-			goto t1;
-		}
-		if (c < 0x10000) {
-			*dst++ = 0xe0 + (c >> 12);
-			goto t2;
-		}
-		*dst++ = 0xf0 + (c >> 18);
-		*dst++ = 0x80 + ((c >> 12) & 0x3f);
-	t2:
-		*dst++ = 0x80 + ((c >> 6) & 0x3f);
-	t1:
-		*dst++ = 0x80 + (c & 0x3f);
-	}
-
-	return dst;
-}
-
-/*
- * Convert the unicode UEFI command line to ASCII to pass to kernel.
- * Size of memory allocated return in *cmd_line_len.
- * Returns NULL on error.
- */
-static char *efi_convert_cmdline(efi_system_table_t *sys_table_arg,
-				 efi_loaded_image_t *image,
-				 int *cmd_line_len)
-{
-	const u16 *s2;
-	u8 *s1 = NULL;
-	unsigned long cmdline_addr = 0;
-	int load_options_chars = image->load_options_size / 2; /* UTF-16 */
-	const u16 *options = image->load_options;
-	int options_bytes = 0;  /* UTF-8 bytes */
-	int options_chars = 0;  /* UTF-16 chars */
-	efi_status_t status;
-	u16 zero = 0;
-
-	if (options) {
-		s2 = options;
-		while (*s2 && *s2 != '\n'
-		       && options_chars < load_options_chars) {
-			options_bytes += efi_utf8_bytes(*s2++);
-			options_chars++;
-		}
-	}
-
-	if (!options_chars) {
-		/* No command line options, so return empty string*/
-		options = &zero;
-	}
-
-	options_bytes++;	/* NUL termination */
-
-	status = efi_low_alloc(sys_table_arg, options_bytes, 0, &cmdline_addr);
-	if (status != EFI_SUCCESS)
-		return NULL;
-
-	s1 = (u8 *)cmdline_addr;
-	s2 = (const u16 *)options;
-
-	s1 = efi_utf16_to_utf8(s1, s2, options_chars);
-	*s1 = '\0';
-
-	*cmd_line_len = options_bytes;
-	return (char *)cmdline_addr;
-}