From 7996b7e9f5826d172b820cea0d072e68cfe485ba Mon Sep 17 00:00:00 2001
From: Marek Vasut <marek.vasut@gmail.com>
Date: Fri, 10 Sep 2021 22:47:17 +0200
Subject: [PATCH] lmb: xtensa: Add arch_lmb_reserve()

Add arch_lmb_reserve() implemented using arch_lmb_reserve_generic().
It is rather likely this architecture also needs to cover U-Boot with
LMB before booting Linux.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Chris Zankel <chris@zankel.net>
Cc: Simon Goldschmidt <simon.k.r.goldschmidt@gmail.com>
Cc: Tom Rini <trini@konsulko.com>
---
 arch/xtensa/lib/bootm.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/arch/xtensa/lib/bootm.c b/arch/xtensa/lib/bootm.c
index bb1e2886ab..277af18168 100644
--- a/arch/xtensa/lib/bootm.c
+++ b/arch/xtensa/lib/bootm.c
@@ -197,3 +197,15 @@ int do_bootm_linux(int flag, int argc, char *argv[], bootm_headers_t *images)
 	return 1;
 }
 
+static ulong get_sp(void)
+{
+	ulong ret;
+
+	asm("mov %0, a1" : "=r"(ret) : );
+	return ret;
+}
+
+void arch_lmb_reserve(struct lmb *lmb)
+{
+	arch_lmb_reserve_generic(lmb, get_sp(), gd->ram_top, 4096);
+}
-- 
2.39.5