aboutsummaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorMatt Fleming <matt.fleming@intel.com>2013-09-25 12:50:59 +0100
committerMatt Fleming <matt.fleming@intel.com>2013-09-25 12:50:59 +0100
commit3203209d61440e02429fc52f192797adf5d8c053 (patch)
tree2c7c3c039ca9d71ae93b7bbc3710952fef6671d1
parent9efff3899b90e5ead9e676af9736e891ee23ce41 (diff)
parent4e283088bd9af0ff119d6e15bca81a83d6e8e30c (diff)
Merge branch 'arm/common' into next
-rw-r--r--Documentation/efi-stub.txt (renamed from Documentation/x86/efi-stub.txt)0
-rw-r--r--arch/x86/Kconfig2
-rw-r--r--arch/x86/boot/compressed/eboot.c580
-rw-r--r--arch/x86/boot/compressed/eboot.h9
-rw-r--r--drivers/firmware/efi/efi-stub-helper.c638
-rw-r--r--include/linux/efi.h50
6 files changed, 712 insertions, 567 deletions
diff --git a/Documentation/x86/efi-stub.txt b/Documentation/efi-stub.txt
index 44e6bb6ead1..44e6bb6ead1 100644
--- a/Documentation/x86/efi-stub.txt
+++ b/Documentation/efi-stub.txt
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index b32ebf92b0c..ec65b51af95 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -1579,7 +1579,7 @@ config EFI_STUB
This kernel feature allows a bzImage to be loaded directly
by EFI firmware without the use of a bootloader.
- See Documentation/x86/efi-stub.txt for more information.
+ See Documentation/efi-stub.txt for more information.
config SECCOMP
def_bool y
diff --git a/arch/x86/boot/compressed/eboot.c b/arch/x86/boot/compressed/eboot.c
index b7388a425f0..beb07a4529a 100644
--- a/arch/x86/boot/compressed/eboot.c
+++ b/arch/x86/boot/compressed/eboot.c
@@ -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;
-
- 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;
+#include "../../../../drivers/firmware/efi/efi-stub-helper.c"
- 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
@@ -875,14 +435,15 @@ struct boot_params *make_boot_params(void *handle, efi_system_table_t *_table)
struct efi_info *efi;
efi_loaded_image_t *image;
void *options;
- u32 load_options_size;
efi_guid_t proto = LOADED_IMAGE_PROTOCOL_GUID;
int options_size = 0;
efi_status_t status;
- unsigned long cmdline;
+ char *cmdline_ptr;
u16 *s2;
u8 *s1;
int i;
+ unsigned long ramdisk_addr;
+ unsigned long ramdisk_size;
sys_table = _table;
@@ -893,13 +454,14 @@ struct boot_params *make_boot_params(void *handle, efi_system_table_t *_table)
status = efi_call_phys3(sys_table->boottime->handle_protocol,
handle, &proto, (void *)&image);
if (status != EFI_SUCCESS) {
- efi_printk("Failed to get handle for LOADED_IMAGE_PROTOCOL\n");
+ efi_printk(sys_table, "Failed to get handle for LOADED_IMAGE_PROTOCOL\n");
return NULL;
}
- status = low_alloc(0x4000, 1, (unsigned long *)&boot_params);
+ status = efi_low_alloc(sys_table, 0x4000, 1,
+ (unsigned long *)&boot_params);
if (status != EFI_SUCCESS) {
- efi_printk("Failed to alloc lowmem for boot params\n");
+ efi_printk(sys_table, "Failed to alloc lowmem for boot params\n");
return NULL;
}
@@ -926,40 +488,11 @@ struct boot_params *make_boot_params(void *handle, efi_system_table_t *_table)
hdr->type_of_loader = 0x21;
/* Convert unicode cmdline to ascii */
- options = image->load_options;
- load_options_size = image->load_options_size / 2; /* 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) {
- efi_printk("Failed to alloc mem for cmdline\n");
- 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;
+ cmdline_ptr = efi_convert_cmdline_to_ascii(sys_table, image,
+ &options_size);
+ if (!cmdline_ptr)
+ goto fail;
+ hdr->cmd_line_ptr = (unsigned long)cmdline_ptr;
hdr->ramdisk_image = 0;
hdr->ramdisk_size = 0;
@@ -969,16 +502,20 @@ struct boot_params *make_boot_params(void *handle, efi_system_table_t *_table)
memset(sdt, 0, sizeof(*sdt));
- status = handle_ramdisks(image, hdr);
+ status = handle_cmdline_files(sys_table, image,
+ (char *)(unsigned long)hdr->cmd_line_ptr,
+ "initrd=", hdr->initrd_addr_max,
+ &ramdisk_addr, &ramdisk_size);
if (status != EFI_SUCCESS)
goto fail2;
+ hdr->ramdisk_image = ramdisk_addr;
+ hdr->ramdisk_size = ramdisk_size;
return boot_params;
fail2:
- if (options_size)
- low_free(options_size, hdr->cmd_line_ptr);
+ efi_free(sys_table, options_size, hdr->cmd_line_ptr);
fail:
- low_free(0x4000, (unsigned long)boot_params);
+ efi_free(sys_table, 0x4000, (unsigned long)boot_params);
return NULL;
}
@@ -996,25 +533,12 @@ static efi_status_t exit_boot(struct boot_params *boot_params,
u8 nr_entries;
int i;
- size = sizeof(*mem_map) * 32;
-
-again:
- size += sizeof(*mem_map) * 2;
- _size = size;
- status = low_alloc(size, 1, (unsigned long *)&mem_map);
- if (status != EFI_SUCCESS)
- return status;
-
get_map:
- 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;
- }
+ status = efi_get_memory_map(sys_table, &mem_map, &size, &desc_size,
+ &desc_version, &key);
if (status != EFI_SUCCESS)
- goto free_mem_map;
+ return status;
memcpy(&efi->efi_loader_signature, EFI_LOADER_SIGNATURE, sizeof(__u32));
efi->efi_systab = (unsigned long)sys_table;
@@ -1043,6 +567,7 @@ get_map:
goto free_mem_map;
called_exit = true;
+ efi_call_phys1(sys_table->boottime->free_pool, mem_map);
goto get_map;
}
@@ -1111,44 +636,10 @@ get_map:
return EFI_SUCCESS;
free_mem_map:
- low_free(_size, (unsigned long)mem_map);
+ efi_call_phys1(sys_table->boottime->free_pool, mem_map);
return status;
}
-static efi_status_t relocate_kernel(struct setup_header *hdr)
-{
- unsigned long start, nr_pages;
- efi_status_t status;
-
- /*
- * 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)
- efi_printk("Failed to alloc mem for kernel\n");
- }
-
- if (status == EFI_SUCCESS)
- memcpy((void *)start, (void *)(unsigned long)hdr->code32_start,
- hdr->init_size);
-
- hdr->pref_address = hdr->code32_start;
- hdr->code32_start = (__u32)start;
-
- return status;
-}
/*
* On success we return a pointer to a boot_params structure, and NULL
@@ -1177,14 +668,15 @@ struct boot_params *efi_main(void *handle, efi_system_table_t *_table,
EFI_LOADER_DATA, sizeof(*gdt),
(void **)&gdt);
if (status != EFI_SUCCESS) {
- efi_printk("Failed to alloc mem for gdt structure\n");
+ efi_printk(sys_table, "Failed to alloc mem for gdt structure\n");
goto fail;
}
gdt->size = 0x800;
- status = low_alloc(gdt->size, 8, (unsigned long *)&gdt->address);
+ status = efi_low_alloc(sys_table, gdt->size, 8,
+ (unsigned long *)&gdt->address);
if (status != EFI_SUCCESS) {
- efi_printk("Failed to alloc mem for gdt\n");
+ efi_printk(sys_table, "Failed to alloc mem for gdt\n");
goto fail;
}
@@ -1192,7 +684,7 @@ struct boot_params *efi_main(void *handle, efi_system_table_t *_table,
EFI_LOADER_DATA, sizeof(*idt),
(void **)&idt);
if (status != EFI_SUCCESS) {
- efi_printk("Failed to alloc mem for idt structure\n");
+ efi_printk(sys_table, "Failed to alloc mem for idt structure\n");
goto fail;
}
@@ -1204,10 +696,16 @@ struct boot_params *efi_main(void *handle, efi_system_table_t *_table,
* address, relocate it.
*/
if (hdr->pref_address != hdr->code32_start) {
- status = relocate_kernel(hdr);
-
+ unsigned long bzimage_addr = hdr->code32_start;
+ status = efi_relocate_kernel(sys_table, &bzimage_addr,
+ hdr->init_size, hdr->init_size,
+ hdr->pref_address,
+ hdr->kernel_alignment);
if (status != EFI_SUCCESS)
goto fail;
+
+ hdr->pref_address = hdr->code32_start;
+ hdr->code32_start = bzimage_addr;
}
status = exit_boot(boot_params, handle);
diff --git a/arch/x86/boot/compressed/eboot.h b/arch/x86/boot/compressed/eboot.h
index e5b0a8f91c5..81b6b652b46 100644
--- a/arch/x86/boot/compressed/eboot.h
+++ b/arch/x86/boot/compressed/eboot.h
@@ -11,9 +11,6 @@
#define DESC_TYPE_CODE_DATA (1 << 0)
-#define EFI_PAGE_SIZE (1UL << EFI_PAGE_SHIFT)
-#define EFI_READ_CHUNK_SIZE (1024 * 1024)
-
#define EFI_CONSOLE_OUT_DEVICE_GUID \
EFI_GUID(0xd3b36f2c, 0xd551, 0x11d4, 0x9a, 0x46, 0x0, 0x90, 0x27, \
0x3f, 0xc1, 0x4d)
@@ -62,10 +59,4 @@ struct efi_uga_draw_protocol {
void *blt;
};
-struct efi_simple_text_output_protocol {
- void *reset;
- void *output_string;
- void *test_string;
-};
-
#endif /* BOOT_COMPRESSED_EBOOT_H */
diff --git a/drivers/firmware/efi/efi-stub-helper.c b/drivers/firmware/efi/efi-stub-helper.c
new file mode 100644
index 00000000000..cc0581daa9e
--- /dev/null
+++ b/drivers/firmware/efi/efi-stub-helper.c
@@ -0,0 +1,638 @@
+/*
+ * 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 file_info {
+ efi_file_handle_t *handle;
+ u64 size;
+};
+
+
+
+
+static void efi_char16_printk(efi_system_table_t *sys_table_arg,
+ efi_char16_t *str)
+{
+ struct efi_simple_text_output_protocol *out;
+
+ out = (struct efi_simple_text_output_protocol *)sys_table_arg->con_out;
+ efi_call_phys2(out->output_string, out, str);
+}
+
+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);
+ }
+}
+
+
+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_phys3(sys_table_arg->boottime->allocate_pool,
+ EFI_LOADER_DATA, *map_size, (void **)&m);
+ if (status != EFI_SUCCESS)
+ goto fail;
+
+ status = efi_call_phys5(sys_table_arg->boottime->get_memory_map,
+ map_size, m, &key, desc_size, &desc_version);
+ if (status == EFI_BUFFER_TOO_SMALL) {
+ efi_call_phys1(sys_table_arg->boottime->free_pool, m);
+ goto again;
+ }
+
+ if (status != EFI_SUCCESS)
+ efi_call_phys1(sys_table_arg->boottime->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;
+}
+
+/*
+ * 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_phys4(sys_table_arg->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;
+ }
+
+ efi_call_phys1(sys_table_arg->boottime->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_phys4(sys_table_arg->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;
+
+ efi_call_phys1(sys_table_arg->boottime->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_phys2(sys_table_arg->boottime->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;
+ efi_guid_t fs_proto = EFI_FILE_SYSTEM_GUID;
+ u64 file_size_total;
+ efi_file_io_interface_t *io;
+ efi_file_handle_t *fh;
+ 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_phys3(sys_table_arg->boottime->allocate_pool,
+ EFI_LOADER_DATA,
+ nr_files * sizeof(*files),
+ (void **)&files);
+ if (status != EFI_SUCCESS) {
+ efi_printk(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_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, 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) {
+ efi_boot_services_t *boottime;
+
+ boottime = sys_table_arg->boottime;
+
+ status = efi_call_phys3(boottime->handle_protocol,
+ image->device_handle, &fs_proto,
+ (void **)&io);
+ if (status != EFI_SUCCESS) {
+ efi_printk(sys_table_arg, "Failed to handle fs_proto\n");
+ goto free_files;
+ }
+
+ status = efi_call_phys2(io->open_volume, io, &fh);
+ if (status != EFI_SUCCESS) {
+ efi_printk(sys_table_arg, "Failed to open volume\n");
+ goto free_files;
+ }
+ }
+
+ status = efi_call_phys5(fh->open, fh, &h, filename_16,
+ EFI_FILE_MODE_READ, (u64)0);
+ if (status != EFI_SUCCESS) {
+ efi_printk(sys_table_arg, "Failed to open file: ");
+ efi_char16_printk(sys_table_arg, filename_16);
+ efi_printk(sys_table_arg, "\n");
+ goto close_handles;
+ }
+
+ file->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(sys_table_arg, "Failed to get file info size\n");
+ goto close_handles;
+ }
+
+grow:
+ status = efi_call_phys3(sys_table_arg->boottime->allocate_pool,
+ EFI_LOADER_DATA, info_sz,
+ (void **)&info);
+ if (status != EFI_SUCCESS) {
+ efi_printk(sys_table_arg, "Failed to alloc mem for file 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_arg->boottime->free_pool,
+ info);
+ goto grow;
+ }
+
+ file_sz = info->file_size;
+ efi_call_phys1(sys_table_arg->boottime->free_pool, info);
+
+ if (status != EFI_SUCCESS) {
+ efi_printk(sys_table_arg, "Failed to get file info\n");
+ goto close_handles;
+ }
+
+ file->size = file_sz;
+ file_size_total += file_sz;
+ }
+
+ 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) {
+ efi_printk(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) {
+ efi_printk(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_call_phys3(fh->read,
+ files[j].handle,
+ &chunksize,
+ (void *)addr);
+ if (status != EFI_SUCCESS) {
+ efi_printk(sys_table_arg, "Failed to read file\n");
+ goto free_file_total;
+ }
+ addr += chunksize;
+ size -= chunksize;
+ }
+
+ efi_call_phys1(fh->close, files[j].handle);
+ }
+
+ }
+
+ efi_call_phys1(sys_table_arg->boottime->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_call_phys1(fh->close, files[k].handle);
+free_files:
+ efi_call_phys1(sys_table_arg->boottime->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_phys4(sys_table_arg->boottime->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) {
+ efi_printk(sys_table_arg, "ERROR: 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);
+ /* Zero any extra space we may have allocated for BSS. */
+ memset((void *)(new_addr + image_size), alloc_size - image_size, 0);
+
+ /* Return the new address of the relocated image. */
+ *image_addr = new_addr;
+
+ return status;
+}
+
+/*
+ * 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;
+}
diff --git a/include/linux/efi.h b/include/linux/efi.h
index c084b6d942c..bc5687d0f31 100644
--- a/include/linux/efi.h
+++ b/include/linux/efi.h
@@ -39,6 +39,8 @@
typedef unsigned long efi_status_t;
typedef u8 efi_bool_t;
typedef u16 efi_char16_t; /* UNICODE character */
+typedef u64 efi_physical_addr_t;
+typedef void *efi_handle_t;
typedef struct {
@@ -96,6 +98,7 @@ typedef struct {
#define EFI_MEMORY_DESCRIPTOR_VERSION 1
#define EFI_PAGE_SHIFT 12
+#define EFI_PAGE_SIZE (1UL << EFI_PAGE_SHIFT)
typedef struct {
u32 type;
@@ -157,11 +160,13 @@ 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;
+ efi_status_t (*allocate_pages)(int, int, unsigned long,
+ efi_physical_addr_t *);
+ efi_status_t (*free_pages)(efi_physical_addr_t, unsigned long);
+ efi_status_t (*get_memory_map)(unsigned long *, void *, unsigned long *,
+ unsigned long *, u32 *);
+ efi_status_t (*allocate_pool)(int, unsigned long, void **);
+ efi_status_t (*free_pool)(void *);
void *create_event;
void *set_timer;
void *wait_for_event;
@@ -171,7 +176,7 @@ typedef struct {
void *install_protocol_interface;
void *reinstall_protocol_interface;
void *uninstall_protocol_interface;
- void *handle_protocol;
+ efi_status_t (*handle_protocol)(efi_handle_t, efi_guid_t *, void **);
void *__reserved;
void *register_protocol_notify;
void *locate_handle;
@@ -181,7 +186,7 @@ typedef struct {
void *start_image;
void *exit;
void *unload_image;
- void *exit_boot_services;
+ efi_status_t (*exit_boot_services)(efi_handle_t, unsigned long);
void *get_next_monotonic_count;
void *stall;
void *set_watchdog_timer;
@@ -494,10 +499,6 @@ typedef struct {
unsigned long unload;
} efi_loaded_image_t;
-typedef struct {
- u64 revision;
- void *open_volume;
-} efi_file_io_interface_t;
typedef struct {
u64 size;
@@ -510,20 +511,30 @@ typedef struct {
efi_char16_t filename[1];
} efi_file_info_t;
-typedef struct {
+typedef struct _efi_file_handle {
u64 revision;
- void *open;
- void *close;
+ efi_status_t (*open)(struct _efi_file_handle *,
+ struct _efi_file_handle **,
+ efi_char16_t *, u64, u64);
+ efi_status_t (*close)(struct _efi_file_handle *);
void *delete;
- void *read;
+ efi_status_t (*read)(struct _efi_file_handle *, unsigned long *,
+ void *);
void *write;
void *get_position;
void *set_position;
- void *get_info;
+ efi_status_t (*get_info)(struct _efi_file_handle *, efi_guid_t *,
+ unsigned long *, void *);
void *set_info;
void *flush;
} efi_file_handle_t;
+typedef struct _efi_file_io_interface {
+ u64 revision;
+ int (*open_volume)(struct _efi_file_io_interface *,
+ efi_file_handle_t **);
+} efi_file_io_interface_t;
+
#define EFI_FILE_MODE_READ 0x0000000000000001
#define EFI_FILE_MODE_WRITE 0x0000000000000002
#define EFI_FILE_MODE_CREATE 0x8000000000000000
@@ -792,6 +803,13 @@ struct efivar_entry {
struct kobject kobj;
};
+
+struct efi_simple_text_output_protocol {
+ void *reset;
+ efi_status_t (*output_string)(void *, void *);
+ void *test_string;
+};
+
extern struct list_head efivar_sysfs_list;
static inline void