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| author | Thomas Chou <thomas@wytron.com.tw> | 2010-05-31 03:58:05 (GMT) |
|---|---|---|
| committer | Scott McNutt <smcnutt@psyent.com> | 2010-07-12 15:30:51 (GMT) |
| commit | 06c5d30dc358a41efa3a27e1c7f602e7b3e8a6f5 (patch) | |
| tree | 55d96d172b6b8b8435c6423934c3fd5c271f3396 /arch/nios2 | |
| parent | cb2da50f0f7b62f2ef806bdc61ec34d103542fbb (diff) | |
| download | u-boot-06c5d30dc358a41efa3a27e1c7f602e7b3e8a6f5.tar.xz | |
nios2: add fdt support
This patch adds fdt support to boot linux, followed Michal's
work on microblaze.
Signed-off-by: Thomas Chou <thomas@wytron.com.tw>
Signed-off-by: Scott McNutt <smcnutt@psyent.com>
Diffstat (limited to 'arch/nios2')
| -rw-r--r-- | arch/nios2/lib/bootm.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/arch/nios2/lib/bootm.c b/arch/nios2/lib/bootm.c index e4093a8..e25a113 100644 --- a/arch/nios2/lib/bootm.c +++ b/arch/nios2/lib/bootm.c @@ -34,6 +34,18 @@ int do_bootm_linux(int flag, int argc, char * const argv[], bootm_headers_t *ima char *commandline = getenv("bootargs"); ulong initrd_start = images->rd_start; ulong initrd_end = images->rd_end; + char *of_flat_tree = NULL; +#if defined(CONFIG_OF_LIBFDT) + ulong of_size = 0; + + /* find flattened device tree */ + if (boot_get_fdt(flag, argc, argv, images, &of_flat_tree, &of_size)) + return 1; +#endif + if (!of_flat_tree) + of_flat_tree = (char *)simple_strtoul(argv[3], NULL, 16); + if (of_flat_tree) + initrd_end = (ulong)of_flat_tree; if ((flag != 0) && (flag != BOOTM_STATE_OS_GO)) return 1; @@ -45,6 +57,15 @@ int do_bootm_linux(int flag, int argc, char * const argv[], bootm_headers_t *ima debug("bootargs=%s @ 0x%lx\n", commandline, (ulong)&commandline); debug("initrd=0x%lx-0x%lx\n", (ulong)initrd_start, (ulong)initrd_end); + /* kernel parameters passing + * r4 : NIOS magic + * r5 : initrd start + * r6 : initrd end or fdt + * r7 : kernel command line + * fdt is passed to kernel via r6, the same as initrd_end. fdt will be + * verified with fdt magic. when both initrd and fdt are used at the + * same time, fdt must follow immediately after initrd. + */ kernel(NIOS_MAGIC, initrd_start, initrd_end, commandline); /* does not return */ |