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powerpc: Fix bootm to boot up again with a Ramdisk 

Commit 2a1a2cb6 didnt remove the dummy mem reservation in fdt_chosen,
and this stopped Linux from booting with a Ramdisk. This patch fixes
this, by deleting the useless dummy mem reservation.

When booting with a Ramdisk, a fix offset FDT_RAMDISK_OVERHEAD is now
added to of_size, so we dont need anymore a dummy mem reservation.

I measured the value of FDT_RAMDISK_OVERHEAD on a MPC8270 based
system (=0x44 bytes) and rounded it up to 0x80).

Signed-off-by: Heiko Schocher <hs@denx.de>
Acked-by: Kumar Gala <galak@kernel.crashing.org>
This commit is contained in:
Heiko Schocher 2008-09-11 08:11:23 +02:00 committed by Wolfgang Denk
parent fc9c1727b5
commit 56844a22b7
5 changed files with 9 additions and 7 deletions
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3
common/cmd_fdt.c
View File

@ -450,7 +450,8 @@ int do_fdt (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
initrd_end = simple_strtoul(argv[3], NULL, 16);
}
fdt_chosen(working_fdt, initrd_start, initrd_end, 1);
fdt_chosen(working_fdt, 1);
fdt_initrd(working_fdt, initrd_start, initrd_end, 1);
}
/* resize the fdt */
else if (strncmp(argv[1], "re", 2) == 0) {

4
common/fdt_support.c
View File

@ -165,7 +165,7 @@ int fdt_initrd(void *fdt, ulong initrd_start, ulong initrd_end, int force)
return 0;
}
int fdt_chosen(void *fdt, ulong initrd_start, ulong initrd_end, int force)
int fdt_chosen(void *fdt, int force)
{
int nodeoffset;
int err;
@ -215,8 +215,6 @@ int fdt_chosen(void *fdt, ulong initrd_start, ulong initrd_end, int force)
}
}
fdt_initrd(fdt, initrd_start, initrd_end, force);
#ifdef CONFIG_OF_STDOUT_VIA_ALIAS
path = fdt_getprop(fdt, nodeoffset, "linux,stdout-path", NULL);
if ((path == NULL) || force)

2
include/fdt.h
View File

@ -57,4 +57,6 @@ struct fdt_property {
#define FDT_V16_SIZE FDT_V3_SIZE
#define FDT_V17_SIZE (FDT_V16_SIZE + sizeof(uint32_t))
/* adding a ramdisk needs 0x44 bytes in version 2008.10 */
#define FDT_RAMDISK_OVERHEAD 0x80
#endif /* _FDT_H */

2
include/fdt_support.h
View File

@ -28,7 +28,7 @@
#include <fdt.h>
int fdt_chosen(void *fdt, ulong initrd_start, ulong initrd_end, int force);
int fdt_chosen(void *fdt, int force);
int fdt_initrd(void *fdt, ulong initrd_start, ulong initrd_end, int force);
void do_fixup_by_path(void *fdt, const char *path, const char *prop,
const void *val, int len, int create);

5
lib_ppc/bootm.c
View File

@ -145,8 +145,7 @@ int do_bootm_linux(int flag, int argc, char *argv[], bootm_headers_t *images)
* if the user wants it (the logic is in the subroutines).
*/
if (of_size) {
/* pass in dummy initrd info, we'll fix up later */
if (fdt_chosen(of_flat_tree, images->rd_start, images->rd_end, 0) < 0) {
if (fdt_chosen(of_flat_tree, 0) < 0) {
puts ("ERROR: ");
puts ("/chosen node create failed");
puts (" - must RESET the board to recover.\n");
@ -169,6 +168,8 @@ int do_bootm_linux(int flag, int argc, char *argv[], bootm_headers_t *images)
goto error;
of_size = ret;
if ((of_flat_tree) && (initrd_start && initrd_end))
of_size += FDT_RAMDISK_OVERHEAD;
/* Create a new LMB reservation */
lmb_reserve(lmb, (ulong)of_flat_tree, of_size);
}