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mirror of git://projects.qi-hardware.com/xburst-tools.git synced 2024-11-01 14:14:38 +02:00

qi-add-initrd-support.patch

Signed-off-by: Andy Green <andy@openmoko.com>
This commit is contained in:
Andy Green 2008-11-28 10:16:41 +00:00 committed by Andy Green
parent 9b5a1a65db
commit fe884c6d10
2 changed files with 68 additions and 48 deletions

View File

@ -46,6 +46,7 @@ enum filesystem {
struct kernel_source { struct kernel_source {
const char *name; /* NULL name means invalid */ const char *name; /* NULL name means invalid */
const char *filepath; const char *filepath;
const char *initramfs_filepath;
int (*block_init)(void); int (*block_init)(void);
int (*block_read)(unsigned char * buf, unsigned long start512, int (*block_read)(unsigned char * buf, unsigned long start512,
int blocks512); int blocks512);

View File

@ -35,11 +35,50 @@ unsigned long partition_length_blocks = 0;
struct kernel_source const * this_kernel = 0; struct kernel_source const * this_kernel = 0;
const int INITRD_OFFSET = (8 * 1024 * 1024);
int raise(int n) int raise(int n)
{ {
return 0; return 0;
} }
int read_file(const char * filepath, u8 * destination, int size)
{
unsigned int len = size;
switch (this_kernel->filesystem) {
case FS_EXT2:
if (!ext2fs_mount()) {
puts("Unable to mount ext2 filesystem\n");
return -1;
}
puts(" EXT2 open: ");
puts(filepath);
puts("\n");
len = ext2fs_open(filepath);
if (len < 0) {
puts("Open failed\n");
return -1;
}
ext2fs_read((char *)destination, size);
break;
case FS_FAT:
/* FIXME */
case FS_RAW:
puts(" RAW open: +");
printdec(partition_offset_blocks);
puts(" 512-byte blocks\n");
if (this_kernel->block_read(destination,
partition_offset_blocks, size >> 9) < 0) {
puts ("Bad kernel header\n");
return -1;
}
break;
}
return len;
}
void bootloader_second_phase(void) void bootloader_second_phase(void)
{ {
@ -47,6 +86,7 @@ void bootloader_second_phase(void)
int kernel = 0; int kernel = 0;
const struct board_variant * board_variant = const struct board_variant * board_variant =
(this_board->get_board_variant)(); (this_board->get_board_variant)();
unsigned int initramfs_len = 0;
/* we try the possible kernels for this board in order */ /* we try the possible kernels for this board in order */
@ -124,41 +164,12 @@ void bootloader_second_phase(void)
partition_offset_blocks = partition_offset_blocks =
this_kernel->offset_blocks512_if_no_partition; this_kernel->offset_blocks512_if_no_partition;
switch (this_kernel->filesystem) { /* pull the kernel image */
case FS_EXT2:
if (!ext2fs_mount()) {
puts("Unable to mount ext2 filesystem\n");
this_kernel = &this_board->
kernel_source[kernel++];
continue;
}
puts(" EXT2 open: ");
puts(this_kernel->filepath);
puts("\n");
if (ext2fs_open(this_kernel->filepath) < 0) {
puts("Open failed\n");
this_kernel = &this_board->
kernel_source[kernel++];
continue;
}
ext2fs_read(kernel_dram, 4096);
break;
case FS_FAT: if (read_file(this_kernel->filepath, kernel_dram, 4096) < 0) {
/* FIXME */ this_kernel = &this_board->kernel_source[kernel++];
case FS_RAW:
puts(" RAW open: +");
printdec(partition_offset_blocks);
puts(" 512-byte blocks\n");
if (this_kernel->block_read(kernel_dram,
partition_offset_blocks, 8) < 0) {
puts ("Bad kernel header\n");
this_kernel = &this_board->
kernel_source[kernel++];
continue; continue;
} }
break;
}
hdr = (image_header_t *)kernel_dram; hdr = (image_header_t *)kernel_dram;
@ -179,24 +190,22 @@ void bootloader_second_phase(void)
kernel_size = ((__be32_to_cpu(hdr->ih_size) + kernel_size = ((__be32_to_cpu(hdr->ih_size) +
sizeof(image_header_t) + 2048) & ~(2048 - 1)); sizeof(image_header_t) + 2048) & ~(2048 - 1));
switch (this_kernel->filesystem) { if (read_file(this_kernel->filepath, kernel_dram,
case FS_EXT2: kernel_size) < 0) {
/* This read API always restarts from beginning */ this_kernel = &this_board->kernel_source[kernel++];
ext2fs_read(kernel_dram, kernel_size); continue;
break; }
case FS_FAT: /* initramfs if needed */
/* FIXME */
case FS_RAW: if (this_kernel->initramfs_filepath) {
if ((this_kernel->block_read)( initramfs_len = read_file(this_kernel->initramfs_filepath,
kernel_dram, partition_offset_blocks, (u8 *)this_board->linux_mem_start + INITRD_OFFSET, 16 * 1024 * 1024);
kernel_size >> 9) < 0) { if (initramfs_len < 0) {
puts ("Bad kernel read\n"); puts("initramfs load failed\n");
this_kernel = &this_board-> this_kernel = &this_board->kernel_source[kernel++];
kernel_source[kernel++];
continue; continue;
} }
break;
} }
puts(" Cmdline: "); puts(" Cmdline: ");
@ -244,6 +253,16 @@ void bootloader_second_phase(void)
params->u.mem.size = this_board->linux_mem_size; params->u.mem.size = this_board->linux_mem_size;
params = tag_next(params); 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 */ /* kernel commandline */
if (*p) { if (*p) {