[U-Boot] [PATCH v3 13/19] ARM: tegra: Implement cboot_save_boot_params() in C

[Thierry Reding]

From: Thierry Reding <treding at nvidia.com>

This is easier to deal with and works just as well for this simple
function.

Signed-off-by: Thierry Reding <treding at nvidia.com>
---
 arch/arm/mach-tegra/Makefile   |  2 +-
 arch/arm/mach-tegra/cboot.c    | 12 ++++++++++++
 arch/arm/mach-tegra/cboot_ll.S | 20 --------------------
 3 files changed, 13 insertions(+), 21 deletions(-)
 delete mode 100644 arch/arm/mach-tegra/cboot_ll.S

diff --git a/arch/arm/mach-tegra/Makefile b/arch/arm/mach-tegra/Makefile
index 41ba674edff4..7165d70a60da 100644
--- a/arch/arm/mach-tegra/Makefile
+++ b/arch/arm/mach-tegra/Makefile
@@ -20,7 +20,7 @@ obj-$(CONFIG_TEGRA_PINCTRL) += pinmux-common.o
 obj-$(CONFIG_TEGRA_PMC) += powergate.o
 obj-y += xusb-padctl-dummy.o
 
-obj-$(CONFIG_ARM64) += arm64-mmu.o cboot_ll.o cboot.o
+obj-$(CONFIG_ARM64) += arm64-mmu.o cboot.o
 obj-y += dt-setup.o
 obj-$(CONFIG_TEGRA_CLOCK_SCALING) += emc.o
 obj-$(CONFIG_TEGRA_GPU) += gpu.o
diff --git a/arch/arm/mach-tegra/cboot.c b/arch/arm/mach-tegra/cboot.c
index 95a097584ac6..acf33b4c4e0c 100644
--- a/arch/arm/mach-tegra/cboot.c
+++ b/arch/arm/mach-tegra/cboot.c
@@ -52,6 +52,18 @@ static u64 ram_top __attribute__((section(".data")));
 /* The base address of the region of RAM that ends at ram_top */
 static u64 region_base __attribute__((section(".data")));
 
+/*
+ * Explicitly put this in the .data section because it is written before the
+ * .bss section is zeroed out but it needs to persist.
+ */
+unsigned long cboot_boot_x0 __attribute__((section(".data")));
+
+void cboot_save_boot_params(unsigned long x0, unsigned long x1,
+			    unsigned long x2, unsigned long x3)
+{
+	cboot_boot_x0 = x0;
+}
+
 int cboot_dram_init(void)
 {
 	unsigned int na, ns;
diff --git a/arch/arm/mach-tegra/cboot_ll.S b/arch/arm/mach-tegra/cboot_ll.S
deleted file mode 100644
index 4c9ddacc2b39..000000000000
--- a/arch/arm/mach-tegra/cboot_ll.S
+++ /dev/null
@@ -1,20 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0+ */
-/*
- * Save cboot-related boot-time CPU state
- *
- * (C) Copyright 2015-2016 NVIDIA Corporation <www.nvidia.com>
- */
-
-#include <config.h>
-#include <linux/linkage.h>
-
-.align 8
-.globl	cboot_boot_x0
-cboot_boot_x0:
-	.dword 0
-
-ENTRY(cboot_save_boot_params)
-	adr	x8, cboot_boot_x0
-	str	x0, [x8]
-	b	save_boot_params_ret
-ENDPROC(cboot_save_boot_params)
-- 
2.21.0