linux-kernel - [PATCH 1/4] MIPS: head.S: Init fw_passed

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Message-Id: <20200730161233.61876-1-paul@crapouillou.net>
Date:   Thu, 30 Jul 2020 18:12:30 +0200
From:   Paul Cercueil <paul@...pouillou.net>
To:     Thomas Bogendoerfer <tsbogend@...ha.franken.de>
Cc:     Jiaxun Yang <jiaxun.yang@...goat.com>, od@...c.me,
        devicetree@...r.kernel.org, linux-mips@...r.kernel.org,
        linux-kernel@...r.kernel.org, Paul Cercueil <paul@...pouillou.net>
Subject: [PATCH 1/4] MIPS: head.S: Init fw_passed_dtb to builtin DTB

Init the 'fw_passed_dtb' pointer to the buit-in Device Tree blob when it
has been compiled in with CONFIG_BUILTIN_DTB.

Signed-off-by: Paul Cercueil <paul@...pouillou.net>
---
 arch/mips/kernel/head.S | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/arch/mips/kernel/head.S b/arch/mips/kernel/head.S
index 3b02ffe46304..7dd234e788e6 100644
--- a/arch/mips/kernel/head.S
+++ b/arch/mips/kernel/head.S
@@ -111,6 +111,12 @@ NESTED(kernel_entry, 16, sp)			# kernel entry point
 	move		t2, a1
 	beq		a0, t1, dtb_found
 
+#ifdef CONFIG_BUILTIN_DTB
+	PTR_LA	t2, __dtb_start
+	PTR_LA	t1, __dtb_end
+	bne		t1, t2, dtb_found
+#endif /* CONFIG_BUILTIN_DTB */
+
 	li		t2, 0
 dtb_found:
 #endif /* CONFIG_USE_OF */
-- 
2.27.0