[PATCH 08/16] Generalize handle_ramdisks() and rename to handle_cmdline_files().

Roy Franz
2013-08-09T23:26:09Z

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>
---
arch/x86/boot/compressed/eboot.c | 9 +++++-
drivers/firmware/efi/efi-stub-helper.c | 50 ++++++++++++++++++--------------
2 files changed, 37 insertions(+), 22 deletions(-)

diff --git a/arch/x86/boot/compressed/eboot.c b/arch/x86/boot/compressed/eboot.c
index bcfdcc2..7011e33 100644
--- a/arch/x86/boot/compressed/eboot.c
+++ b/arch/x86/boot/compressed/eboot.c
@@ -443,6 +443,8 @@ struct boot_params *make_boot_params(void *handle, efi_system_table_t *_table)
u16 *s2;
u8 *s1;
int i;
+ u64 ramdisk_addr;
+ u64 ramdisk_size;

sys_table = _table;

@@ -531,9 +533,14 @@ 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:
diff --git a/drivers/firmware/efi/efi-stub-helper.c b/drivers/firmware/efi/efi-stub-helper.c
index c45e287..b5ef766 100644
--- a/drivers/firmware/efi/efi-stub-helper.c
+++ b/drivers/firmware/efi/efi-stub-helper.c
@@ -267,9 +267,11 @@ 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,
+ u64 max_addr,
+ u64 *load_addr, u64 *load_size)
{
struct initrd *initrds;
unsigned long initrd_addr;
@@ -285,19 +287,25 @@ 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 == '\\')
@@ -315,11 +323,11 @@ 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;
@@ -330,11 +338,11 @@ 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;
@@ -380,7 +388,7 @@ 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 file: ");
efi_char16_printk(sys_table_arg, filename_16);
efi_printk(sys_table_arg, "\n");
goto close_handles;
@@ -392,7 +400,7 @@ 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;
}

@@ -400,7 +408,7 @@ 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;
}

@@ -416,7 +424,7 @@ 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;
}

@@ -433,14 +441,14 @@ 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;
@@ -461,7 +469,7 @@ 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;
@@ -475,8 +483,8 @@ 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;

@@ -489,8 +497,8 @@ 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;
}
--
1.7.10.4