mirror of
git://projects.qi-hardware.com/xburst-tools.git
synced 2024-11-26 10:03:13 +02:00
phase2: simplify the bootloader_second_phase mega-loop
This puts the loop body in a new function called try_this_kernel. As an added benefit, we can drop one level of indentation. This change is hard to read as a patch. It gets better if one just applies it and then looks at it with "git diff -w" or similar. Signed-off-by: Werner Almesberger <werner@openmoko.org>
This commit is contained in:
Werner Almesberger
Andy Green
parent
b98b8f5ea1
commit
32f76a7afe
@ -96,292 +96,274 @@ int read_file(const char * filepath, u8 * destination, int size)
|
||||
return len;
|
||||
}
|
||||
|
||||
void bootloader_second_phase(void)
|
||||
static void try_this_kernel(void)
|
||||
{
|
||||
void (*the_kernel)(int zero, int arch, uint params);
|
||||
int kernel = 0;
|
||||
const struct board_variant * board_variant =
|
||||
(this_board->get_board_variant)();
|
||||
unsigned int initramfs_len = 0;
|
||||
static char commandline_rootfs_append[512] = "";
|
||||
static void * last_block_init = NULL;
|
||||
static int last_block_init_result = 0;
|
||||
int ret;
|
||||
void * last_block_init = NULL;
|
||||
int last_block_init_result = 0;
|
||||
const char *p;
|
||||
char * cmdline;
|
||||
struct tag *params = (struct tag *)this_board->linux_tag_placement;
|
||||
void * kernel_dram = (void *)this_board->linux_mem_start + 0x8000;
|
||||
unsigned long crc;
|
||||
image_header_t *hdr;
|
||||
u32 kernel_size;
|
||||
|
||||
partition_offset_blocks = 0;
|
||||
partition_length_blocks = 0;
|
||||
|
||||
/* eat leading white space */
|
||||
for (p = this_board->commandline_board; *p == ' '; p++);
|
||||
|
||||
puts("\nTrying kernel: ");
|
||||
puts(this_kernel->name);
|
||||
puts("\n");
|
||||
|
||||
indicate(UI_IND_MOUNT_PART);
|
||||
|
||||
/* if this device needs initializing, try to init it */
|
||||
if (this_kernel->block_init) {
|
||||
/*
|
||||
* cache result to limit attempts for same
|
||||
* block device to one time
|
||||
*/
|
||||
if (this_kernel->block_init != last_block_init)
|
||||
last_block_init_result = (this_kernel->block_init)();
|
||||
|
||||
if (last_block_init_result) {
|
||||
puts("block device init failed\n");
|
||||
if (this_kernel->block_init != last_block_init)
|
||||
indicate(UI_IND_MOUNT_FAIL);
|
||||
last_block_init = this_kernel[1].block_init;
|
||||
return;
|
||||
}
|
||||
last_block_init = this_kernel->block_init;
|
||||
}
|
||||
|
||||
/* if there's a partition table implied, parse it, otherwise
|
||||
* just use a fixed offset
|
||||
*/
|
||||
if (this_kernel->partition_index) {
|
||||
unsigned char *p = kernel_dram;
|
||||
|
||||
if ((int)this_kernel->block_read(kernel_dram, 0, 4) < 0) {
|
||||
puts("Bad partition read\n");
|
||||
indicate(UI_IND_MOUNT_FAIL);
|
||||
return;
|
||||
}
|
||||
|
||||
if ((p[0x1fe] != 0x55) || (p[0x1ff] != 0xaa)) {
|
||||
puts("partition signature missing\n");
|
||||
indicate(UI_IND_MOUNT_FAIL);
|
||||
return;
|
||||
}
|
||||
|
||||
p += 0x1be + 8 + (0x10 * (this_kernel->partition_index - 1));
|
||||
|
||||
partition_offset_blocks = (((u32)p[3]) << 24) |
|
||||
(((u32)p[2]) << 16) |
|
||||
(((u32)p[1]) << 8) |
|
||||
p[0];
|
||||
partition_length_blocks = (((u32)p[7]) << 24) |
|
||||
(((u32)p[6]) << 16) |
|
||||
(((u32)p[5]) << 8) |
|
||||
p[4];
|
||||
|
||||
puts(" Partition: ");
|
||||
printdec(this_kernel->partition_index);
|
||||
puts(" start +");
|
||||
printdec(partition_offset_blocks);
|
||||
puts(" 512-byte blocks, size ");
|
||||
printdec(partition_length_blocks / 2048);
|
||||
puts(" MiB\n");
|
||||
|
||||
} else
|
||||
partition_offset_blocks =
|
||||
this_kernel->offset_blocks512_if_no_partition;
|
||||
|
||||
/* does he want us to skip this? */
|
||||
|
||||
ret = read_file(this_board->noboot, kernel_dram, 512);
|
||||
if (ret != -1) {
|
||||
/* -2 (mount fail) should make us give up too */
|
||||
if (ret >= 0) {
|
||||
puts(" (Skipping on finding ");
|
||||
puts(this_board->noboot);
|
||||
puts(")\n");
|
||||
indicate(UI_IND_SKIPPING);
|
||||
}
|
||||
return;
|
||||
}
|
||||
|
||||
/* is there a commandline append file? */
|
||||
|
||||
commandline_rootfs_append[0] = '\0';
|
||||
read_file(this_board->append, (u8 *)commandline_rootfs_append, 512);
|
||||
|
||||
indicate(UI_IND_KERNEL_PULL);
|
||||
|
||||
/* pull the kernel image */
|
||||
|
||||
if (read_file(this_kernel->filepath, kernel_dram, 4096) < 0)
|
||||
return;
|
||||
|
||||
hdr = (image_header_t *)kernel_dram;
|
||||
|
||||
if (__be32_to_cpu(hdr->ih_magic) != IH_MAGIC) {
|
||||
puts("bad magic ");
|
||||
print32(hdr->ih_magic);
|
||||
puts("\n");
|
||||
return;
|
||||
}
|
||||
|
||||
puts(" Found: \"");
|
||||
puts((const char *)hdr->ih_name);
|
||||
puts("\"\n Size: ");
|
||||
printdec(__be32_to_cpu(hdr->ih_size) >> 10);
|
||||
puts(" KiB\n");
|
||||
|
||||
kernel_size = ((__be32_to_cpu(hdr->ih_size) +
|
||||
sizeof(image_header_t) + 2048) & ~(2048 - 1));
|
||||
|
||||
if (read_file(this_kernel->filepath, kernel_dram, kernel_size) < 0) {
|
||||
indicate(UI_IND_KERNEL_PULL_FAIL);
|
||||
return;
|
||||
}
|
||||
|
||||
indicate(UI_IND_KERNEL_PULL_OK);
|
||||
|
||||
/* initramfs if needed */
|
||||
|
||||
if (this_kernel->initramfs_filepath) {
|
||||
indicate(UI_IND_INITRAMFS_PULL);
|
||||
initramfs_len = read_file(this_kernel->initramfs_filepath,
|
||||
(u8 *)this_board->linux_mem_start + INITRD_OFFSET,
|
||||
16 * 1024 * 1024);
|
||||
if (initramfs_len < 0) {
|
||||
puts("initramfs load failed\n");
|
||||
indicate(UI_IND_INITRAMFS_PULL_FAIL);
|
||||
return;
|
||||
}
|
||||
indicate(UI_IND_INITRAMFS_PULL_OK);
|
||||
}
|
||||
|
||||
/*
|
||||
* It's good for now to know that our kernel is intact from
|
||||
* the storage before we jump into it and maybe crash silently
|
||||
* even though it costs us some time
|
||||
*/
|
||||
crc = crc32(0, kernel_dram + sizeof(image_header_t),
|
||||
__be32_to_cpu(hdr->ih_size));
|
||||
if (crc != __be32_to_cpu(hdr->ih_dcrc)) {
|
||||
puts("\nKernel CRC ERROR: read 0x");
|
||||
print32(crc);
|
||||
puts(" vs hdr CRC 0x");
|
||||
print32(__be32_to_cpu(hdr->ih_dcrc));
|
||||
puts("\n");
|
||||
return;
|
||||
}
|
||||
|
||||
the_kernel = (void (*)(int, int, uint))
|
||||
(((char *)hdr) + sizeof(image_header_t));
|
||||
|
||||
/* first tag */
|
||||
params->hdr.tag = ATAG_CORE;
|
||||
params->hdr.size = tag_size (tag_core);
|
||||
params->u.core.flags = 0;
|
||||
params->u.core.pagesize = 0;
|
||||
params->u.core.rootdev = 0;
|
||||
params = tag_next(params);
|
||||
|
||||
/* revision tag */
|
||||
params->hdr.tag = ATAG_REVISION;
|
||||
params->hdr.size = tag_size (tag_revision);
|
||||
params->u.revision.rev = board_variant->machine_revision;
|
||||
params = tag_next(params);
|
||||
|
||||
/* memory tags */
|
||||
params->hdr.tag = ATAG_MEM;
|
||||
params->hdr.size = tag_size (tag_mem32);
|
||||
params->u.mem.start = this_board->linux_mem_start;
|
||||
params->u.mem.size = this_board->linux_mem_size;
|
||||
params = tag_next(params);
|
||||
|
||||
if (this_kernel->initramfs_filepath) {
|
||||
/* INITRD2 tag */
|
||||
params->hdr.tag = ATAG_INITRD2;
|
||||
params->hdr.size = tag_size (tag_initrd);
|
||||
params->u.initrd.start = this_board->linux_mem_start +
|
||||
INITRD_OFFSET;
|
||||
params->u.initrd.size = initramfs_len;
|
||||
params = tag_next(params);
|
||||
}
|
||||
|
||||
/* kernel commandline */
|
||||
|
||||
cmdline = params->u.cmdline.cmdline;
|
||||
cmdline += strlen(strcpy(cmdline, p));
|
||||
if (this_kernel->commandline_append)
|
||||
cmdline += strlen(strcpy(cmdline,
|
||||
this_kernel->commandline_append));
|
||||
if (commandline_rootfs_append[0])
|
||||
cmdline += strlen(strcpy(cmdline,
|
||||
commandline_rootfs_append));
|
||||
|
||||
/*
|
||||
* if he's still holding down the UI_ACTION_SKIPKERNEL key
|
||||
* now we finished loading the kernel, take it to mean he wants
|
||||
* to have the debugging options added to the commandline
|
||||
*/
|
||||
|
||||
if (this_board->commandline_board_debug && this_board->get_ui_keys)
|
||||
if ((this_board->get_ui_keys)() & UI_ACTION_SKIPKERNEL)
|
||||
cmdline += strlen(strcpy(cmdline, this_board->
|
||||
commandline_board_debug));
|
||||
|
||||
params->hdr.tag = ATAG_CMDLINE;
|
||||
params->hdr.size = (sizeof (struct tag_header) +
|
||||
strlen(params->u.cmdline.cmdline) + 1 + 4) >> 2;
|
||||
|
||||
puts(" Cmdline: ");
|
||||
puts(params->u.cmdline.cmdline);
|
||||
puts("\n");
|
||||
|
||||
params = tag_next (params);
|
||||
|
||||
/* needs to always be the last tag */
|
||||
params->hdr.tag = ATAG_NONE;
|
||||
params->hdr.size = 0;
|
||||
|
||||
/* give board implementation a chance to shut down
|
||||
* anything it may have going on, leave GPIO set for Linux
|
||||
*/
|
||||
if (this_board->close)
|
||||
(this_board->close)();
|
||||
|
||||
puts ("Starting --->\n\n");
|
||||
indicate(UI_IND_KERNEL_START);
|
||||
|
||||
/*
|
||||
* ooh that's it, we're gonna try boot this image!
|
||||
* never mind the cache, Linux will take care of it
|
||||
*/
|
||||
the_kernel(0, this_board->linux_machine_id,
|
||||
this_board->linux_tag_placement);
|
||||
|
||||
/* we won't come back here no matter what */
|
||||
}
|
||||
|
||||
void bootloader_second_phase(void)
|
||||
{
|
||||
/* we try the possible kernels for this board in order */
|
||||
|
||||
this_kernel = &this_board->kernel_source[kernel++];
|
||||
|
||||
while (this_kernel->name) {
|
||||
const char *p;
|
||||
char * cmdline;
|
||||
struct tag *params = (struct tag *)this_board->linux_tag_placement;
|
||||
void * kernel_dram = (void *)this_board->linux_mem_start + 0x8000;
|
||||
unsigned long crc;
|
||||
image_header_t *hdr;
|
||||
u32 kernel_size;
|
||||
|
||||
partition_offset_blocks = 0;
|
||||
partition_length_blocks = 0;
|
||||
|
||||
/* eat leading white space */
|
||||
for (p = this_board->commandline_board; *p == ' '; p++);
|
||||
|
||||
puts("\nTrying kernel: ");
|
||||
puts(this_kernel->name);
|
||||
puts("\n");
|
||||
|
||||
indicate(UI_IND_MOUNT_PART);
|
||||
|
||||
/* if this device needs initializing, try to init it */
|
||||
if (this_kernel->block_init) {
|
||||
/*
|
||||
* cache result to limit attempts for same
|
||||
* block device to one time
|
||||
*/
|
||||
if (this_kernel->block_init != last_block_init)
|
||||
last_block_init_result =
|
||||
(this_kernel->block_init)();
|
||||
|
||||
if (last_block_init_result) {
|
||||
puts("block device init failed\n");
|
||||
if (this_kernel->block_init != last_block_init)
|
||||
indicate(UI_IND_MOUNT_FAIL);
|
||||
this_kernel = &this_board->
|
||||
kernel_source[kernel++];
|
||||
last_block_init = this_kernel->block_init;
|
||||
continue;
|
||||
}
|
||||
last_block_init = this_kernel->block_init;
|
||||
}
|
||||
|
||||
/* if there's a partition table implied, parse it, otherwise
|
||||
* just use a fixed offset
|
||||
*/
|
||||
if (this_kernel->partition_index) {
|
||||
unsigned char *p = kernel_dram;
|
||||
|
||||
if ((int)this_kernel->block_read(kernel_dram, 0, 4)
|
||||
< 0) {
|
||||
puts("Bad partition read\n");
|
||||
this_kernel = &this_board->
|
||||
kernel_source[kernel++];
|
||||
indicate(UI_IND_MOUNT_FAIL);
|
||||
continue;
|
||||
}
|
||||
|
||||
if ((p[0x1fe] != 0x55) || (p[0x1ff] != 0xaa)) {
|
||||
puts("partition signature missing\n");
|
||||
this_kernel = &this_board->
|
||||
kernel_source[kernel++];
|
||||
indicate(UI_IND_MOUNT_FAIL);
|
||||
continue;
|
||||
}
|
||||
|
||||
p += 0x1be + 8 + (0x10 *
|
||||
(this_kernel->partition_index - 1));
|
||||
|
||||
partition_offset_blocks = (((u32)p[3]) << 24) |
|
||||
(((u32)p[2]) << 16) |
|
||||
(((u32)p[1]) << 8) |
|
||||
p[0];
|
||||
partition_length_blocks = (((u32)p[7]) << 24) |
|
||||
(((u32)p[6]) << 16) |
|
||||
(((u32)p[5]) << 8) |
|
||||
p[4];
|
||||
|
||||
puts(" Partition: ");
|
||||
printdec(this_kernel->partition_index);
|
||||
puts(" start +");
|
||||
printdec(partition_offset_blocks);
|
||||
puts(" 512-byte blocks, size ");
|
||||
printdec(partition_length_blocks / 2048);
|
||||
puts(" MiB\n");
|
||||
|
||||
} else
|
||||
partition_offset_blocks =
|
||||
this_kernel->offset_blocks512_if_no_partition;
|
||||
|
||||
/* does he want us to skip this? */
|
||||
|
||||
ret = read_file(this_board->noboot, kernel_dram, 512);
|
||||
if (ret != -1) {
|
||||
/* -2 (mount fail) should make us give up too */
|
||||
if (ret >= 0) {
|
||||
puts(" (Skipping on finding ");
|
||||
puts(this_board->noboot);
|
||||
puts(")\n");
|
||||
indicate(UI_IND_SKIPPING);
|
||||
}
|
||||
this_kernel = &this_board->kernel_source[kernel++];
|
||||
continue;
|
||||
}
|
||||
|
||||
/* is there a commandline append file? */
|
||||
|
||||
commandline_rootfs_append[0] = '\0';
|
||||
read_file(this_board->append, (u8 *)commandline_rootfs_append,
|
||||
512);
|
||||
|
||||
indicate(UI_IND_KERNEL_PULL);
|
||||
|
||||
/* pull the kernel image */
|
||||
|
||||
if (read_file(this_kernel->filepath, kernel_dram, 4096) < 0) {
|
||||
this_kernel = &this_board->kernel_source[kernel++];
|
||||
continue;
|
||||
}
|
||||
|
||||
hdr = (image_header_t *)kernel_dram;
|
||||
|
||||
if (__be32_to_cpu(hdr->ih_magic) != IH_MAGIC) {
|
||||
puts("bad magic ");
|
||||
print32(hdr->ih_magic);
|
||||
puts("\n");
|
||||
this_kernel = &this_board->kernel_source[kernel++];
|
||||
continue;
|
||||
}
|
||||
|
||||
puts(" Found: \"");
|
||||
puts((const char *)hdr->ih_name);
|
||||
puts("\"\n Size: ");
|
||||
printdec(__be32_to_cpu(hdr->ih_size) >> 10);
|
||||
puts(" KiB\n");
|
||||
|
||||
kernel_size = ((__be32_to_cpu(hdr->ih_size) +
|
||||
sizeof(image_header_t) + 2048) & ~(2048 - 1));
|
||||
|
||||
if (read_file(this_kernel->filepath, kernel_dram,
|
||||
kernel_size) < 0) {
|
||||
this_kernel = &this_board->kernel_source[kernel++];
|
||||
indicate(UI_IND_KERNEL_PULL_FAIL);
|
||||
continue;
|
||||
}
|
||||
|
||||
indicate(UI_IND_KERNEL_PULL_OK);
|
||||
|
||||
/* initramfs if needed */
|
||||
|
||||
if (this_kernel->initramfs_filepath) {
|
||||
indicate(UI_IND_INITRAMFS_PULL);
|
||||
initramfs_len = read_file(this_kernel->initramfs_filepath,
|
||||
(u8 *)this_board->linux_mem_start + INITRD_OFFSET,
|
||||
16 * 1024 * 1024);
|
||||
if (initramfs_len < 0) {
|
||||
puts("initramfs load failed\n");
|
||||
this_kernel = &this_board->kernel_source[kernel++];
|
||||
indicate(UI_IND_INITRAMFS_PULL_FAIL);
|
||||
continue;
|
||||
}
|
||||
indicate(UI_IND_INITRAMFS_PULL_OK);
|
||||
}
|
||||
|
||||
/*
|
||||
* It's good for now to know that our kernel is intact from
|
||||
* the storage before we jump into it and maybe crash silently
|
||||
* even though it costs us some time
|
||||
*/
|
||||
crc = crc32(0, kernel_dram + sizeof(image_header_t),
|
||||
__be32_to_cpu(hdr->ih_size));
|
||||
if (crc != __be32_to_cpu(hdr->ih_dcrc)) {
|
||||
puts("\nKernel CRC ERROR: read 0x");
|
||||
print32(crc);
|
||||
puts(" vs hdr CRC 0x");
|
||||
print32(__be32_to_cpu(hdr->ih_dcrc));
|
||||
puts("\n");
|
||||
this_kernel = &this_board->kernel_source[kernel++];
|
||||
continue;
|
||||
}
|
||||
|
||||
the_kernel = (void (*)(int, int, uint))
|
||||
(((char *)hdr) + sizeof(image_header_t));
|
||||
|
||||
/* first tag */
|
||||
params->hdr.tag = ATAG_CORE;
|
||||
params->hdr.size = tag_size (tag_core);
|
||||
params->u.core.flags = 0;
|
||||
params->u.core.pagesize = 0;
|
||||
params->u.core.rootdev = 0;
|
||||
params = tag_next(params);
|
||||
|
||||
/* revision tag */
|
||||
params->hdr.tag = ATAG_REVISION;
|
||||
params->hdr.size = tag_size (tag_revision);
|
||||
params->u.revision.rev = board_variant->machine_revision;
|
||||
params = tag_next(params);
|
||||
|
||||
/* memory tags */
|
||||
params->hdr.tag = ATAG_MEM;
|
||||
params->hdr.size = tag_size (tag_mem32);
|
||||
params->u.mem.start = this_board->linux_mem_start;
|
||||
params->u.mem.size = this_board->linux_mem_size;
|
||||
params = tag_next(params);
|
||||
|
||||
if (this_kernel->initramfs_filepath) {
|
||||
/* INITRD2 tag */
|
||||
params->hdr.tag = ATAG_INITRD2;
|
||||
params->hdr.size = tag_size (tag_initrd);
|
||||
params->u.initrd.start = this_board->linux_mem_start +
|
||||
INITRD_OFFSET;
|
||||
params->u.initrd.size = initramfs_len;
|
||||
params = tag_next(params);
|
||||
}
|
||||
|
||||
/* kernel commandline */
|
||||
|
||||
cmdline = params->u.cmdline.cmdline;
|
||||
cmdline += strlen(strcpy(cmdline, p));
|
||||
if (this_kernel->commandline_append)
|
||||
cmdline += strlen(strcpy(cmdline,
|
||||
this_kernel->commandline_append));
|
||||
if (commandline_rootfs_append[0])
|
||||
cmdline += strlen(strcpy(cmdline,
|
||||
commandline_rootfs_append));
|
||||
|
||||
/*
|
||||
* if he's still holding down the UI_ACTION_SKIPKERNEL key
|
||||
* now we finished loading the kernel, take it to mean he wants
|
||||
* to have the debugging options added to the commandline
|
||||
*/
|
||||
|
||||
if (this_board->commandline_board_debug &&
|
||||
this_board->get_ui_keys)
|
||||
if ((this_board->get_ui_keys)() & UI_ACTION_SKIPKERNEL)
|
||||
cmdline += strlen(strcpy(cmdline, this_board->
|
||||
commandline_board_debug));
|
||||
|
||||
params->hdr.tag = ATAG_CMDLINE;
|
||||
params->hdr.size = (sizeof (struct tag_header) +
|
||||
strlen(params->u.cmdline.cmdline) + 1 + 4) >> 2;
|
||||
|
||||
puts(" Cmdline: ");
|
||||
puts(params->u.cmdline.cmdline);
|
||||
puts("\n");
|
||||
|
||||
params = tag_next (params);
|
||||
|
||||
/* needs to always be the last tag */
|
||||
params->hdr.tag = ATAG_NONE;
|
||||
params->hdr.size = 0;
|
||||
|
||||
/* give board implementation a chance to shut down
|
||||
* anything it may have going on, leave GPIO set for Linux
|
||||
*/
|
||||
if (this_board->close)
|
||||
(this_board->close)();
|
||||
|
||||
puts ("Starting --->\n\n");
|
||||
indicate(UI_IND_KERNEL_START);
|
||||
|
||||
/*
|
||||
* ooh that's it, we're gonna try boot this image!
|
||||
* never mind the cache, Linux will take care of it
|
||||
*/
|
||||
the_kernel(0, this_board->linux_machine_id,
|
||||
this_board->linux_tag_placement);
|
||||
|
||||
/* we won't come back here no matter what */
|
||||
}
|
||||
for (this_kernel = this_board->kernel_source; this_kernel->name;
|
||||
this_kernel++)
|
||||
try_this_kernel();
|
||||
|
||||
/* none of the kernels worked out */
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user