| Message ID | edd42bb5aa30ac3eb26a9e08b1dc6fc9041aa3b1.1704788539.git.ysato@users.sourceforge.jp (mailing list archive) |
|---|---|
| State | Not Applicable |
| Delegated to: | Krzysztof Wilczyński |
| Headers | show |
| Series | Device Tree support for SH7751 based board | expand |
On Tue, Jan 9, 2024 at 9:23 AM Yoshinori Sato <ysato@users.sourceforge.jp> wrote: > R4 is caller saved in SH ABI. > Save it so it doesn't get corrupted until it's needed for initialization. > > Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp> My Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> on v3 is still valid. Gr{oetje,eeting}s, Geert
diff --git a/arch/sh/boot/compressed/head_32.S b/arch/sh/boot/compressed/head_32.S index 7bb168133dbb..6be59851122e 100644 --- a/arch/sh/boot/compressed/head_32.S +++ b/arch/sh/boot/compressed/head_32.S @@ -15,7 +15,8 @@ startup: /* Load initial status register */ mov.l init_sr, r1 ldc r1, sr - + /* Save FDT address */ + mov r4, r13 /* Move myself to proper location if necessary */ mova 1f, r0 mov.l 1f, r2 @@ -84,7 +85,7 @@ l1: /* Jump to the start of the decompressed kernel */ mov.l kernel_start_addr, r0 jmp @r0 - nop + mov r13, r4 .align 2 bss_start_addr:
R4 is caller saved in SH ABI. Save it so it doesn't get corrupted until it's needed for initialization. Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp> --- arch/sh/boot/compressed/head_32.S | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)