2013-09-23 06:45:27 +08:00
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/*
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* Helper functions used by the EFI stub on multiple
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* architectures. This should be #included by the EFI stub
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* implementation files.
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*
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* Copyright 2011 Intel Corporation; author Matt Fleming
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*
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* This file is part of the Linux kernel, and is made available
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* under the terms of the GNU General Public License version 2.
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*
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*/
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#define EFI_READ_CHUNK_SIZE (1024 * 1024)
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2013-09-23 06:45:40 +08:00
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struct file_info {
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2013-09-23 06:45:27 +08:00
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efi_file_handle_t *handle;
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u64 size;
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};
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2013-09-23 06:45:28 +08:00
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static void efi_printk(efi_system_table_t *sys_table_arg, char *str)
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2013-09-23 06:45:27 +08:00
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{
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char *s8;
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for (s8 = str; *s8; s8++) {
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efi_char16_t ch[2] = { 0 };
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ch[0] = *s8;
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if (*s8 == '\n') {
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efi_char16_t nl[2] = { '\r', 0 };
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2013-09-23 06:45:28 +08:00
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efi_char16_printk(sys_table_arg, nl);
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2013-09-23 06:45:27 +08:00
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}
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2013-09-23 06:45:28 +08:00
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efi_char16_printk(sys_table_arg, ch);
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2013-09-23 06:45:27 +08:00
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}
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}
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2013-09-23 06:45:35 +08:00
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static efi_status_t efi_get_memory_map(efi_system_table_t *sys_table_arg,
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efi_memory_desc_t **map,
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unsigned long *map_size,
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2013-09-23 06:45:36 +08:00
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unsigned long *desc_size,
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u32 *desc_ver,
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unsigned long *key_ptr)
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2013-09-23 06:45:27 +08:00
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{
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efi_memory_desc_t *m = NULL;
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efi_status_t status;
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unsigned long key;
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u32 desc_version;
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*map_size = sizeof(*m) * 32;
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again:
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/*
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* Add an additional efi_memory_desc_t because we're doing an
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* allocation which may be in a new descriptor region.
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*/
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*map_size += sizeof(*m);
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2014-03-22 18:09:01 +08:00
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status = efi_call_early(allocate_pool, EFI_LOADER_DATA,
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*map_size, (void **)&m);
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2013-09-23 06:45:27 +08:00
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if (status != EFI_SUCCESS)
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goto fail;
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2014-01-10 23:27:14 +08:00
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*desc_size = 0;
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key = 0;
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2014-03-22 18:09:01 +08:00
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status = efi_call_early(get_memory_map, map_size, m,
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&key, desc_size, &desc_version);
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2013-09-23 06:45:27 +08:00
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if (status == EFI_BUFFER_TOO_SMALL) {
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2014-03-22 18:09:01 +08:00
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efi_call_early(free_pool, m);
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2013-09-23 06:45:27 +08:00
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goto again;
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}
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if (status != EFI_SUCCESS)
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2014-03-22 18:09:01 +08:00
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efi_call_early(free_pool, m);
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2014-01-10 23:27:14 +08:00
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2013-09-23 06:45:36 +08:00
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if (key_ptr && status == EFI_SUCCESS)
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*key_ptr = key;
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if (desc_ver && status == EFI_SUCCESS)
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*desc_ver = desc_version;
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2013-09-23 06:45:27 +08:00
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fail:
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*map = m;
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return status;
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}
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/*
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* Allocate at the highest possible address that is not above 'max'.
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*/
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2013-09-23 06:45:29 +08:00
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static efi_status_t efi_high_alloc(efi_system_table_t *sys_table_arg,
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2013-09-23 06:45:28 +08:00
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unsigned long size, unsigned long align,
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unsigned long *addr, unsigned long max)
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2013-09-23 06:45:27 +08:00
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{
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unsigned long map_size, desc_size;
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efi_memory_desc_t *map;
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efi_status_t status;
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unsigned long nr_pages;
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u64 max_addr = 0;
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int i;
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2013-09-23 06:45:36 +08:00
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status = efi_get_memory_map(sys_table_arg, &map, &map_size, &desc_size,
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NULL, NULL);
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2013-09-23 06:45:27 +08:00
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if (status != EFI_SUCCESS)
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goto fail;
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2013-09-23 06:45:30 +08:00
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/*
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* Enforce minimum alignment that EFI requires when requesting
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* a specific address. We are doing page-based allocations,
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* so we must be aligned to a page.
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*/
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if (align < EFI_PAGE_SIZE)
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align = EFI_PAGE_SIZE;
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2013-09-23 06:45:27 +08:00
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nr_pages = round_up(size, EFI_PAGE_SIZE) / EFI_PAGE_SIZE;
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again:
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for (i = 0; i < map_size / desc_size; i++) {
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efi_memory_desc_t *desc;
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unsigned long m = (unsigned long)map;
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u64 start, end;
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desc = (efi_memory_desc_t *)(m + (i * desc_size));
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if (desc->type != EFI_CONVENTIONAL_MEMORY)
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continue;
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if (desc->num_pages < nr_pages)
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continue;
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start = desc->phys_addr;
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end = start + desc->num_pages * (1UL << EFI_PAGE_SHIFT);
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if ((start + size) > end || (start + size) > max)
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continue;
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if (end - size > max)
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end = max;
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if (round_down(end - size, align) < start)
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continue;
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start = round_down(end - size, align);
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/*
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* Don't allocate at 0x0. It will confuse code that
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* checks pointers against NULL.
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*/
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if (start == 0x0)
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continue;
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if (start > max_addr)
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max_addr = start;
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}
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if (!max_addr)
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status = EFI_NOT_FOUND;
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else {
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2014-03-22 18:09:01 +08:00
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status = efi_call_early(allocate_pages,
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EFI_ALLOCATE_ADDRESS, EFI_LOADER_DATA,
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nr_pages, &max_addr);
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2013-09-23 06:45:27 +08:00
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if (status != EFI_SUCCESS) {
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max = max_addr;
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max_addr = 0;
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goto again;
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}
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*addr = max_addr;
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}
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2014-03-22 18:09:01 +08:00
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efi_call_early(free_pool, map);
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2013-09-23 06:45:27 +08:00
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fail:
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return status;
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}
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/*
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* Allocate at the lowest possible address.
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*/
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2013-09-23 06:45:29 +08:00
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static efi_status_t efi_low_alloc(efi_system_table_t *sys_table_arg,
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unsigned long size, unsigned long align,
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2013-09-23 06:45:27 +08:00
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unsigned long *addr)
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{
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unsigned long map_size, desc_size;
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efi_memory_desc_t *map;
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efi_status_t status;
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unsigned long nr_pages;
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int i;
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2013-09-23 06:45:36 +08:00
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status = efi_get_memory_map(sys_table_arg, &map, &map_size, &desc_size,
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NULL, NULL);
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2013-09-23 06:45:27 +08:00
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if (status != EFI_SUCCESS)
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goto fail;
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2013-09-23 06:45:30 +08:00
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/*
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* Enforce minimum alignment that EFI requires when requesting
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* a specific address. We are doing page-based allocations,
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* so we must be aligned to a page.
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*/
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if (align < EFI_PAGE_SIZE)
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align = EFI_PAGE_SIZE;
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2013-09-23 06:45:27 +08:00
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nr_pages = round_up(size, EFI_PAGE_SIZE) / EFI_PAGE_SIZE;
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for (i = 0; i < map_size / desc_size; i++) {
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efi_memory_desc_t *desc;
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unsigned long m = (unsigned long)map;
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u64 start, end;
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desc = (efi_memory_desc_t *)(m + (i * desc_size));
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if (desc->type != EFI_CONVENTIONAL_MEMORY)
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continue;
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if (desc->num_pages < nr_pages)
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continue;
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start = desc->phys_addr;
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end = start + desc->num_pages * (1UL << EFI_PAGE_SHIFT);
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/*
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* Don't allocate at 0x0. It will confuse code that
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* checks pointers against NULL. Skip the first 8
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* bytes so we start at a nice even number.
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*/
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if (start == 0x0)
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start += 8;
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start = round_up(start, align);
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if ((start + size) > end)
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continue;
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2014-03-22 18:09:01 +08:00
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status = efi_call_early(allocate_pages,
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EFI_ALLOCATE_ADDRESS, EFI_LOADER_DATA,
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nr_pages, &start);
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2013-09-23 06:45:27 +08:00
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if (status == EFI_SUCCESS) {
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*addr = start;
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break;
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}
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}
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if (i == map_size / desc_size)
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status = EFI_NOT_FOUND;
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2014-03-22 18:09:01 +08:00
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efi_call_early(free_pool, map);
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2013-09-23 06:45:27 +08:00
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fail:
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return status;
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}
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2013-09-23 06:45:29 +08:00
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static void efi_free(efi_system_table_t *sys_table_arg, unsigned long size,
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2013-09-23 06:45:28 +08:00
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unsigned long addr)
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2013-09-23 06:45:27 +08:00
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{
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unsigned long nr_pages;
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2013-09-23 06:45:38 +08:00
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if (!size)
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return;
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2013-09-23 06:45:27 +08:00
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nr_pages = round_up(size, EFI_PAGE_SIZE) / EFI_PAGE_SIZE;
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2014-03-22 18:09:01 +08:00
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efi_call_early(free_pages, addr, nr_pages);
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2013-09-23 06:45:27 +08:00
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}
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/*
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2013-09-23 06:45:40 +08:00
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* Check the cmdline for a LILO-style file= arguments.
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2013-09-23 06:45:27 +08:00
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*
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2013-09-23 06:45:40 +08:00
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* We only support loading a file from the same filesystem as
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* the kernel image.
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2013-09-23 06:45:27 +08:00
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*/
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2013-09-23 06:45:39 +08:00
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static efi_status_t handle_cmdline_files(efi_system_table_t *sys_table_arg,
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efi_loaded_image_t *image,
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char *cmd_line, char *option_string,
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unsigned long max_addr,
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unsigned long *load_addr,
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unsigned long *load_size)
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2013-09-23 06:45:27 +08:00
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{
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2013-09-23 06:45:40 +08:00
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struct file_info *files;
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unsigned long file_addr;
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u64 file_size_total;
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2013-09-23 06:45:27 +08:00
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efi_file_handle_t *fh;
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efi_status_t status;
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2013-09-23 06:45:40 +08:00
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int nr_files;
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2013-09-23 06:45:27 +08:00
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char *str;
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int i, j, k;
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2013-09-23 06:45:40 +08:00
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file_addr = 0;
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file_size_total = 0;
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2013-09-23 06:45:27 +08:00
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|
2013-09-23 06:45:39 +08:00
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str = cmd_line;
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2013-09-23 06:45:27 +08:00
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j = 0; /* See close_handles */
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2013-09-23 06:45:39 +08:00
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if (!load_addr || !load_size)
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return EFI_INVALID_PARAMETER;
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|
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*load_addr = 0;
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*load_size = 0;
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2013-09-23 06:45:27 +08:00
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if (!str || !*str)
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return EFI_SUCCESS;
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|
|
|
2013-09-23 06:45:40 +08:00
|
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for (nr_files = 0; *str; nr_files++) {
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2013-09-23 06:45:39 +08:00
|
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str = strstr(str, option_string);
|
2013-09-23 06:45:27 +08:00
|
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if (!str)
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break;
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|
2013-09-23 06:45:39 +08:00
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str += strlen(option_string);
|
2013-09-23 06:45:27 +08:00
|
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/* Skip any leading slashes */
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while (*str == '/' || *str == '\\')
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str++;
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while (*str && *str != ' ' && *str != '\n')
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str++;
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}
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|
2013-09-23 06:45:40 +08:00
|
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if (!nr_files)
|
2013-09-23 06:45:27 +08:00
|
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|
return EFI_SUCCESS;
|
|
|
|
|
2014-03-22 18:09:01 +08:00
|
|
|
status = efi_call_early(allocate_pool, EFI_LOADER_DATA,
|
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|
|
nr_files * sizeof(*files), (void **)&files);
|
2013-09-23 06:45:27 +08:00
|
|
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if (status != EFI_SUCCESS) {
|
2013-09-23 06:45:40 +08:00
|
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efi_printk(sys_table_arg, "Failed to alloc mem for file handle list\n");
|
2013-09-23 06:45:27 +08:00
|
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goto fail;
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}
|
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|
|
2013-09-23 06:45:39 +08:00
|
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str = cmd_line;
|
2013-09-23 06:45:40 +08:00
|
|
|
for (i = 0; i < nr_files; i++) {
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|
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struct file_info *file;
|
2013-09-23 06:45:27 +08:00
|
|
|
efi_char16_t filename_16[256];
|
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|
|
efi_char16_t *p;
|
|
|
|
|
2013-09-23 06:45:39 +08:00
|
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|
str = strstr(str, option_string);
|
2013-09-23 06:45:27 +08:00
|
|
|
if (!str)
|
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|
|
break;
|
|
|
|
|
2013-09-23 06:45:39 +08:00
|
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|
str += strlen(option_string);
|
2013-09-23 06:45:27 +08:00
|
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|
|
2013-09-23 06:45:40 +08:00
|
|
|
file = &files[i];
|
2013-09-23 06:45:27 +08:00
|
|
|
p = filename_16;
|
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|
|
|
/* 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++ = '\\';
|
2013-09-23 06:45:42 +08:00
|
|
|
str++;
|
2013-09-23 06:45:27 +08:00
|
|
|
} else {
|
|
|
|
*p++ = *str++;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
*p = '\0';
|
|
|
|
|
|
|
|
/* Only open the volume once. */
|
|
|
|
if (!i) {
|
2014-01-10 23:27:14 +08:00
|
|
|
status = efi_open_volume(sys_table_arg, image,
|
|
|
|
(void **)&fh);
|
|
|
|
if (status != EFI_SUCCESS)
|
2013-09-23 06:45:40 +08:00
|
|
|
goto free_files;
|
2013-09-23 06:45:27 +08:00
|
|
|
}
|
|
|
|
|
2014-01-10 23:27:14 +08:00
|
|
|
status = efi_file_size(sys_table_arg, fh, filename_16,
|
|
|
|
(void **)&file->handle, &file->size);
|
|
|
|
if (status != EFI_SUCCESS)
|
2013-09-23 06:45:27 +08:00
|
|
|
goto close_handles;
|
|
|
|
|
2014-01-10 23:27:14 +08:00
|
|
|
file_size_total += file->size;
|
2013-09-23 06:45:27 +08:00
|
|
|
}
|
|
|
|
|
2013-09-23 06:45:40 +08:00
|
|
|
if (file_size_total) {
|
2013-09-23 06:45:27 +08:00
|
|
|
unsigned long addr;
|
|
|
|
|
|
|
|
/*
|
2013-09-23 06:45:40 +08:00
|
|
|
* 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.
|
2013-09-23 06:45:27 +08:00
|
|
|
*/
|
2013-09-23 06:45:40 +08:00
|
|
|
status = efi_high_alloc(sys_table_arg, file_size_total, 0x1000,
|
|
|
|
&file_addr, max_addr);
|
2013-09-23 06:45:27 +08:00
|
|
|
if (status != EFI_SUCCESS) {
|
2013-09-23 06:45:40 +08:00
|
|
|
efi_printk(sys_table_arg, "Failed to alloc highmem for files\n");
|
2013-09-23 06:45:27 +08:00
|
|
|
goto close_handles;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* We've run out of free low memory. */
|
2013-09-23 06:45:40 +08:00
|
|
|
if (file_addr > max_addr) {
|
2013-09-23 06:45:28 +08:00
|
|
|
efi_printk(sys_table_arg, "We've run out of free low memory\n");
|
2013-09-23 06:45:27 +08:00
|
|
|
status = EFI_INVALID_PARAMETER;
|
2013-09-23 06:45:40 +08:00
|
|
|
goto free_file_total;
|
2013-09-23 06:45:27 +08:00
|
|
|
}
|
|
|
|
|
2013-09-23 06:45:40 +08:00
|
|
|
addr = file_addr;
|
|
|
|
for (j = 0; j < nr_files; j++) {
|
2013-09-23 06:45:41 +08:00
|
|
|
unsigned long size;
|
2013-09-23 06:45:27 +08:00
|
|
|
|
2013-09-23 06:45:40 +08:00
|
|
|
size = files[j].size;
|
2013-09-23 06:45:27 +08:00
|
|
|
while (size) {
|
2013-09-23 06:45:41 +08:00
|
|
|
unsigned long chunksize;
|
2013-09-23 06:45:27 +08:00
|
|
|
if (size > EFI_READ_CHUNK_SIZE)
|
|
|
|
chunksize = EFI_READ_CHUNK_SIZE;
|
|
|
|
else
|
|
|
|
chunksize = size;
|
2014-01-10 23:27:14 +08:00
|
|
|
|
2014-04-10 21:11:45 +08:00
|
|
|
status = efi_file_read(files[j].handle,
|
2014-01-10 23:27:14 +08:00
|
|
|
&chunksize,
|
|
|
|
(void *)addr);
|
2013-09-23 06:45:27 +08:00
|
|
|
if (status != EFI_SUCCESS) {
|
2013-09-23 06:45:39 +08:00
|
|
|
efi_printk(sys_table_arg, "Failed to read file\n");
|
2013-09-23 06:45:40 +08:00
|
|
|
goto free_file_total;
|
2013-09-23 06:45:27 +08:00
|
|
|
}
|
|
|
|
addr += chunksize;
|
|
|
|
size -= chunksize;
|
|
|
|
}
|
|
|
|
|
2014-04-10 21:11:45 +08:00
|
|
|
efi_file_close(files[j].handle);
|
2013-09-23 06:45:27 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
}
|
|
|
|
|
2014-03-22 18:09:01 +08:00
|
|
|
efi_call_early(free_pool, files);
|
2013-09-23 06:45:27 +08:00
|
|
|
|
2013-09-23 06:45:40 +08:00
|
|
|
*load_addr = file_addr;
|
|
|
|
*load_size = file_size_total;
|
2013-09-23 06:45:27 +08:00
|
|
|
|
|
|
|
return status;
|
|
|
|
|
2013-09-23 06:45:40 +08:00
|
|
|
free_file_total:
|
|
|
|
efi_free(sys_table_arg, file_size_total, file_addr);
|
2013-09-23 06:45:27 +08:00
|
|
|
|
|
|
|
close_handles:
|
|
|
|
for (k = j; k < i; k++)
|
2014-04-10 21:11:45 +08:00
|
|
|
efi_file_close(files[k].handle);
|
2013-09-23 06:45:40 +08:00
|
|
|
free_files:
|
2014-03-22 18:09:01 +08:00
|
|
|
efi_call_early(free_pool, files);
|
2013-09-23 06:45:27 +08:00
|
|
|
fail:
|
2013-09-23 06:45:39 +08:00
|
|
|
*load_addr = 0;
|
|
|
|
*load_size = 0;
|
2013-09-23 06:45:27 +08:00
|
|
|
|
|
|
|
return status;
|
|
|
|
}
|
2013-09-23 06:45:32 +08:00
|
|
|
/*
|
|
|
|
* 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)
|
2013-09-23 06:45:31 +08:00
|
|
|
{
|
2013-09-23 06:45:32 +08:00
|
|
|
unsigned long cur_image_addr;
|
|
|
|
unsigned long new_addr = 0;
|
2013-09-23 06:45:31 +08:00
|
|
|
efi_status_t status;
|
2013-09-23 06:45:32 +08:00
|
|
|
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;
|
2013-09-23 06:45:31 +08:00
|
|
|
|
|
|
|
/*
|
|
|
|
* The EFI firmware loader could have placed the kernel image
|
2013-09-23 06:45:32 +08:00
|
|
|
* 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.
|
2013-09-23 06:45:31 +08:00
|
|
|
*/
|
2013-09-23 06:45:32 +08:00
|
|
|
nr_pages = round_up(alloc_size, EFI_PAGE_SIZE) / EFI_PAGE_SIZE;
|
2014-03-22 18:09:01 +08:00
|
|
|
status = efi_call_early(allocate_pages,
|
|
|
|
EFI_ALLOCATE_ADDRESS, EFI_LOADER_DATA,
|
|
|
|
nr_pages, &efi_addr);
|
2013-09-23 06:45:32 +08:00
|
|
|
new_addr = efi_addr;
|
|
|
|
/*
|
|
|
|
* If preferred address allocation failed allocate as low as
|
|
|
|
* possible.
|
|
|
|
*/
|
2013-09-23 06:45:31 +08:00
|
|
|
if (status != EFI_SUCCESS) {
|
2013-09-23 06:45:32 +08:00
|
|
|
status = efi_low_alloc(sys_table_arg, alloc_size, alignment,
|
|
|
|
&new_addr);
|
|
|
|
}
|
|
|
|
if (status != EFI_SUCCESS) {
|
|
|
|
efi_printk(sys_table_arg, "ERROR: Failed to allocate usable memory for kernel.\n");
|
|
|
|
return status;
|
2013-09-23 06:45:31 +08:00
|
|
|
}
|
|
|
|
|
2013-09-23 06:45:32 +08:00
|
|
|
/*
|
|
|
|
* 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);
|
2013-09-23 06:45:31 +08:00
|
|
|
|
2013-09-23 06:45:32 +08:00
|
|
|
/* Return the new address of the relocated image. */
|
|
|
|
*image_addr = new_addr;
|
2013-09-23 06:45:31 +08:00
|
|
|
|
|
|
|
return status;
|
|
|
|
}
|
2013-09-23 06:45:33 +08:00
|
|
|
|
|
|
|
/*
|
|
|
|
* 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_to_ascii(efi_system_table_t *sys_table_arg,
|
|
|
|
efi_loaded_image_t *image,
|
|
|
|
int *cmd_line_len)
|
|
|
|
{
|
|
|
|
u16 *s2;
|
|
|
|
u8 *s1 = NULL;
|
|
|
|
unsigned long cmdline_addr = 0;
|
|
|
|
int load_options_size = image->load_options_size / 2; /* ASCII */
|
|
|
|
void *options = image->load_options;
|
|
|
|
int options_size = 0;
|
|
|
|
efi_status_t status;
|
|
|
|
int i;
|
|
|
|
u16 zero = 0;
|
|
|
|
|
|
|
|
if (options) {
|
|
|
|
s2 = options;
|
|
|
|
while (*s2 && *s2 != '\n' && options_size < load_options_size) {
|
|
|
|
s2++;
|
|
|
|
options_size++;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
if (options_size == 0) {
|
|
|
|
/* No command line options, so return empty string*/
|
|
|
|
options_size = 1;
|
|
|
|
options = &zero;
|
|
|
|
}
|
|
|
|
|
|
|
|
options_size++; /* NUL termination */
|
|
|
|
#ifdef CONFIG_ARM
|
|
|
|
/*
|
|
|
|
* For ARM, allocate at a high address to avoid reserved
|
|
|
|
* regions at low addresses that we don't know the specfics of
|
|
|
|
* at the time we are processing the command line.
|
|
|
|
*/
|
|
|
|
status = efi_high_alloc(sys_table_arg, options_size, 0,
|
|
|
|
&cmdline_addr, 0xfffff000);
|
|
|
|
#else
|
|
|
|
status = efi_low_alloc(sys_table_arg, options_size, 0,
|
|
|
|
&cmdline_addr);
|
|
|
|
#endif
|
|
|
|
if (status != EFI_SUCCESS)
|
|
|
|
return NULL;
|
|
|
|
|
|
|
|
s1 = (u8 *)cmdline_addr;
|
|
|
|
s2 = (u16 *)options;
|
|
|
|
|
|
|
|
for (i = 0; i < options_size - 1; i++)
|
|
|
|
*s1++ = *s2++;
|
|
|
|
|
|
|
|
*s1 = '\0';
|
|
|
|
|
|
|
|
*cmd_line_len = options_size;
|
|
|
|
return (char *)cmdline_addr;
|
|
|
|
}
|