From a02c18f31f8b99418be8b17135c7a10910dc10e8 Mon Sep 17 00:00:00 2001
From: Marek Vasut <marek.vasut@gmail.com>
Date: Fri, 10 Sep 2021 22:47:13 +0200
Subject: [PATCH] lmb: nios2: 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: Simon Goldschmidt <simon.k.r.goldschmidt@gmail.com>
Cc: Thomas Chou <thomas@wytron.com.tw>
Cc: Tom Rini <trini@konsulko.com>
---
arch/nios2/lib/bootm.c | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
diff --git a/arch/nios2/lib/bootm.c b/arch/nios2/lib/bootm.c
index 5037467151..3cb59bd977 100644
--- a/arch/nios2/lib/bootm.c
+++ b/arch/nios2/lib/bootm.c
@@ -10,6 +10,9 @@
#include <image.h>
#include <irq_func.h>
#include <log.h>
+#include <asm/global_data.h>
+
+DECLARE_GLOBAL_DATA_PTR;
#define NIOS_MAGIC 0x534f494e /* enable command line and initrd passing */
@@ -60,3 +63,16 @@ int do_bootm_linux(int flag, int argc, char *const argv[],
return 1;
}
+
+static ulong get_sp(void)
+{
+ ulong ret;
+
+ asm("mov %0, sp" : "=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