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linux-sg2042
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efi: Generalize handle_ramdisks() and rename to handle_cmdline_files(). 

The handle_cmdline_files now takes the option to handle as a string,
and returns the loaded data through parameters, rather than taking
an x86 specific setup_header structure.  For ARM, this will be used
to load a device tree blob in addition to initrd images.

Signed-off-by: Roy Franz <roy.franz@linaro.org>
Acked-by: Mark Salter <msalter@redhat.com>
Reviewed-by: Grant Likely <grant.likely@linaro.org>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
This commit is contained in:
Roy Franz 2013-09-22 15:45:39 -07:00 committed by Matt Fleming
parent 0e1cadb05b
commit 46f4582e7c
2 changed files with 38 additions and 22 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
arch/x86/boot/compressed/eboot.c
View File

@ -442,6 +442,8 @@ struct boot_params *make_boot_params(void *handle, efi_system_table_t *_table)
u16 *s2;
u8 *s1;
int i;
unsigned long ramdisk_addr;
unsigned long ramdisk_size;
sys_table = _table;
@ -500,9 +502,14 @@ struct boot_params *make_boot_params(void *handle, efi_system_table_t *_table)
memset(sdt, 0, sizeof(*sdt));
status = handle_ramdisks(sys_table, 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:

51
drivers/firmware/efi/efi-stub-helper.c
View File

@ -269,9 +269,12 @@ static void efi_free(efi_system_table_t *sys_table_arg, unsigned long size,
* We only support loading an initrd from the same filesystem as the
* kernel image.
*/
static efi_status_t handle_ramdisks(efi_system_table_t *sys_table_arg,
efi_loaded_image_t *image,
struct setup_header *hdr)
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 initrd *initrds;
unsigned long initrd_addr;
@ -287,19 +290,25 @@ static efi_status_t handle_ramdisks(efi_system_table_t *sys_table_arg,
initrd_addr = 0;
initrd_total = 0;
str = (char *)(unsigned long)hdr->cmd_line_ptr;
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_initrds = 0; *str; nr_initrds++) {
str = strstr(str, "initrd=");
str = strstr(str, option_string);
if (!str)
break;
str += 7;
str += strlen(option_string);
/* Skip any leading slashes */
while (*str == '/' || *str == '\\')
@ -317,11 +326,11 @@ static efi_status_t handle_ramdisks(efi_system_table_t *sys_table_arg,
nr_initrds * sizeof(*initrds),
&initrds);
if (status != EFI_SUCCESS) {
efi_printk(sys_table_arg, "Failed to alloc mem for initrds\n");
efi_printk(sys_table_arg, "Failed to alloc mem for file load\n");
goto fail;
}
str = (char *)(unsigned long)hdr->cmd_line_ptr;
str = cmd_line;
for (i = 0; i < nr_initrds; i++) {
struct initrd *initrd;
efi_file_handle_t *h;
@ -332,11 +341,11 @@ static efi_status_t handle_ramdisks(efi_system_table_t *sys_table_arg,
efi_char16_t *p;
u64 file_sz;
str = strstr(str, "initrd=");
str = strstr(str, option_string);
if (!str)
break;
str += 7;
str += strlen(option_string);
initrd = &initrds[i];
p = filename_16;
@ -382,7 +391,7 @@ static efi_status_t handle_ramdisks(efi_system_table_t *sys_table_arg,
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 initrd file: ");
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;
@ -394,7 +403,7 @@ static efi_status_t handle_ramdisks(efi_system_table_t *sys_table_arg,
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 initrd info size\n");
efi_printk(sys_table_arg, "Failed to get file info size\n");
goto close_handles;
}
@ -402,7 +411,7 @@ grow:
status = efi_call_phys3(sys_table_arg->boottime->allocate_pool,
EFI_LOADER_DATA, info_sz, &info);
if (status != EFI_SUCCESS) {
efi_printk(sys_table_arg, "Failed to alloc mem for initrd info\n");
efi_printk(sys_table_arg, "Failed to alloc mem for file info\n");
goto close_handles;
}
@ -418,7 +427,7 @@ grow:
efi_call_phys1(sys_table_arg->boottime->free_pool, info);
if (status != EFI_SUCCESS) {
efi_printk(sys_table_arg, "Failed to get initrd info\n");
efi_printk(sys_table_arg, "Failed to get file info\n");
goto close_handles;
}
@ -435,14 +444,14 @@ grow:
* all the initrd's.
*/
status = efi_high_alloc(sys_table_arg, initrd_total, 0x1000,
&initrd_addr, hdr->initrd_addr_max);
&initrd_addr, max_addr);
if (status != EFI_SUCCESS) {
efi_printk(sys_table_arg, "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) {
if (initrd_addr > max_addr) {
efi_printk(sys_table_arg, "We've run out of free low memory\n");
status = EFI_INVALID_PARAMETER;
goto free_initrd_total;
@ -463,7 +472,7 @@ grow:
initrds[j].handle,
&chunksize, addr);
if (status != EFI_SUCCESS) {
efi_printk(sys_table_arg, "Failed to read initrd\n");
efi_printk(sys_table_arg, "Failed to read file\n");
goto free_initrd_total;
}
addr += chunksize;
@ -477,8 +486,8 @@ grow:
efi_call_phys1(sys_table_arg->boottime->free_pool, initrds);
hdr->ramdisk_image = initrd_addr;
hdr->ramdisk_size = initrd_total;
*load_addr = initrd_addr;
*load_size = initrd_total;
return status;
@ -491,8 +500,8 @@ close_handles:
free_initrds:
efi_call_phys1(sys_table_arg->boottime->free_pool, initrds);
fail:
hdr->ramdisk_image = 0;
hdr->ramdisk_size = 0;
*load_addr = 0;
*load_size = 0;
return status;
}