[RESEND][PATCH] arm64: Add missing GD_FLG_SKIP_RELOC handling

* [RESEND][PATCH] arm64: Add missing GD_FLG_SKIP_RELOC handling
@ 2021-11-13 17:34 marek.vasut
  2021-11-18 23:27 ` Tom Rini
  0 siblings, 1 reply; 2+ messages in thread
From: marek.vasut @ 2021-11-13 17:34 UTC (permalink / raw)
  To: u-boot; +Cc: Marek Vasut, Simon Glass, Tom Rini

From: Marek Vasut <marek.vasut+renesas@gmail.com>

In case U-Boot enters relocation with GD_FLG_SKIP_RELOC, skip the
relocation. The code still has to set up new_gd pointer and new
stack pointer.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Simon Glass <sjg@chromium.org>
Cc: Tom Rini <trini@konsulko.com>
---
 arch/arm/lib/crt0_64.S | 4 ++++
 lib/asm-offsets.c      | 3 +++
 2 files changed, 7 insertions(+)

diff --git a/arch/arm/lib/crt0_64.S b/arch/arm/lib/crt0_64.S
index 680e674fa3..28c8356aee 100644
--- a/arch/arm/lib/crt0_64.S
+++ b/arch/arm/lib/crt0_64.S
@@ -104,6 +104,10 @@ ENTRY(_main)
 	bic	sp, x0, #0xf	/* 16-byte alignment for ABI compliance */
 	ldr	x18, [x18, #GD_NEW_GD]		/* x18 <- gd->new_gd */
 
+	/* Skip relocation in case gd->gd_flags & GD_FLG_SKIP_RELOC */
+	ldr	x0, [x18, #GD_FLAGS]		/* x0 <- gd->flags */
+	tbnz	x0, 11, relocation_return	/* GD_FLG_SKIP_RELOC is bit 11 */
+
 	adr	lr, relocation_return
 #if CONFIG_POSITION_INDEPENDENT
 	/* Add in link-vs-runtime offset */
diff --git a/lib/asm-offsets.c b/lib/asm-offsets.c
index c691066332..0808cd4b0c 100644
--- a/lib/asm-offsets.c
+++ b/lib/asm-offsets.c
@@ -29,6 +29,9 @@ int main(void)
 	DEFINE(GD_SIZE, sizeof(struct global_data));
 
 	DEFINE(GD_BD, offsetof(struct global_data, bd));
+
+	DEFINE(GD_FLAGS, offsetof(struct global_data, flags));
+
 #if CONFIG_VAL(SYS_MALLOC_F_LEN)
 	DEFINE(GD_MALLOC_BASE, offsetof(struct global_data, malloc_base));
 #endif
-- 
2.33.0


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