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qi-add-initrd-support.patch

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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
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1
qiboot/include/qi.h
View File

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

115
qiboot/src/phase2.c
View File

@ -35,11 +35,50 @@ unsigned long partition_length_blocks = 0;
struct kernel_source const * this_kernel = 0;
const int INITRD_OFFSET = (8 * 1024 * 1024);
int raise(int n)
{
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)
{
@ -47,6 +86,7 @@ void bootloader_second_phase(void)
int kernel = 0;
const struct board_variant * board_variant =
(this_board->get_board_variant)();
unsigned int initramfs_len = 0;
/* we try the possible kernels for this board in order */
@ -124,41 +164,12 @@ void bootloader_second_phase(void)
partition_offset_blocks =
this_kernel->offset_blocks512_if_no_partition;
switch (this_kernel->filesystem) {
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;
/* pull the kernel image */
case FS_FAT:
/* FIXME */
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++];
if (read_file(this_kernel->filepath, kernel_dram, 4096) < 0) {
this_kernel = &this_board->kernel_source[kernel++];
continue;
}
break;
}
hdr = (image_header_t *)kernel_dram;
@ -179,24 +190,22 @@ void bootloader_second_phase(void)
kernel_size = ((__be32_to_cpu(hdr->ih_size) +
sizeof(image_header_t) + 2048) & ~(2048 - 1));
switch (this_kernel->filesystem) {
case FS_EXT2:
/* This read API always restarts from beginning */
ext2fs_read(kernel_dram, kernel_size);
break;
case FS_FAT:
/* FIXME */
case FS_RAW:
if ((this_kernel->block_read)(
kernel_dram, partition_offset_blocks,
kernel_size >> 9) < 0) {
puts ("Bad kernel read\n");
this_kernel = &this_board->
kernel_source[kernel++];
if (read_file(this_kernel->filepath, kernel_dram,
kernel_size) < 0) {
this_kernel = &this_board->kernel_source[kernel++];
continue;
}
/* initramfs if needed */
if (this_kernel->initramfs_filepath) {
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++];
continue;
}
break;
}
puts(" Cmdline: ");
@ -244,6 +253,16 @@ void bootloader_second_phase(void)
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 */
if (*p) {