If the OF_SEPARATE is enabled, the DT is appended past the _end symbol. The current code however clears BSS very early, which overwrites the DT blob with zeroes. Moreover, the early code relocates U-Boot into RAM to the correct location, but does not relocate the DT.
This patch adds code to relocate the DT and avoids clearing BSS too early, thus addressing both problems with OF_SEPARATE on SH.
Signed-off-by: Marek Vasut marek.vasut+renesas@gmail.com Cc: Nobuhiro Iwamatsu iwamatsu@nigauri.org --- arch/sh/cpu/u-boot.lds | 1 + arch/sh/lib/start.S | 14 ++++++++++++++ 2 files changed, 15 insertions(+)
diff --git a/arch/sh/cpu/u-boot.lds b/arch/sh/cpu/u-boot.lds index 7b225a6bd9..47302da252 100644 --- a/arch/sh/cpu/u-boot.lds +++ b/arch/sh/cpu/u-boot.lds @@ -75,6 +75,7 @@ SECTIONS
PROVIDE (__init_end = .); PROVIDE (reloc_dst_end = .); + PROVIDE (_end = .);
PROVIDE (bss_start = .); PROVIDE (__bss_start = .); diff --git a/arch/sh/lib/start.S b/arch/sh/lib/start.S index f5350b9064..f9f26d3779 100644 --- a/arch/sh/lib/start.S +++ b/arch/sh/lib/start.S @@ -22,6 +22,17 @@ _start: mov.l ._reloc_dst, r4 add #(_start-1b), r5 mov.l ._reloc_dst_end, r6 +#ifdef CONFIG_OF_SEPARATE + mov.l ._reloc_size, r0 + add r5, r0 + add #4, r0 + mov.l @r0, r0 + swap.b r0, r0 + swap.w r0, r0 + swap.b r0, r0 + add #4, r0 + add r0, r6 +#endif
2: mov.l @r5+, r1 mov.l r1, @r4 @@ -29,6 +40,7 @@ _start: cmp/hs r6, r4 bf 2b
+#ifndef CONFIG_OF_SEPARATE mov.l ._bss_start, r4 mov.l ._bss_end, r5 mov #0, r1 @@ -37,6 +49,7 @@ _start: add #4, r4 cmp/hs r5, r4 bf 3b +#endif
mov.l ._gd_init, r13 /* global data */ mov.l ._stack_init, r15 /* stack */ @@ -53,6 +66,7 @@ loop: ._lowlevel_init: .long (lowlevel_init - (100b + 4)) ._reloc_dst: .long _start ._reloc_dst_end: .long reloc_dst_end +._reloc_size: .long (_end - _start) ._bss_start: .long bss_start ._bss_end: .long bss_end ._gd_init: .long (_start - GENERATED_GBL_DATA_SIZE)