Adding upstream version 4.19.249.upstream/4.19.249upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 44 insertions, 0 deletions

diff --git a/arch/sparc/prom/bootstr_64.c b/arch/sparc/prom/bootstr_64.c
new file mode 100644
index 000000000..f1cc34d99
--- /dev/null
+++ b/arch/sparc/prom/bootstr_64.c
@@ -0,0 +1,44 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * bootstr.c:  Boot string/argument acquisition from the PROM.
+ *
+ * Copyright(C) 1995 David S. Miller (davem@caip.rutgers.edu)
+ * Copyright(C) 1996,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
+ */
+
+#include <linux/string.h>
+#include <linux/init.h>
+#include <asm/oplib.h>
+
+/* WARNING: The boot loader knows that these next three variables come one right
+ *          after another in the .data section.  Do not move this stuff into
+ *          the .bss section or it will break things.
+ */
+
+/* We limit BARG_LEN to 1024 because this is the size of the
+ * 'barg_out' command line buffer in the SILO bootloader.
+ */
+#define BARG_LEN 1024
+struct {
+	int bootstr_len;
+	int bootstr_valid;
+	char bootstr_buf[BARG_LEN];
+} bootstr_info = {
+	.bootstr_len = BARG_LEN,
+#ifdef CONFIG_CMDLINE
+	.bootstr_valid = 1,
+	.bootstr_buf = CONFIG_CMDLINE,
+#endif
+};
+
+char * __init
+prom_getbootargs(void)
+{
+	/* This check saves us from a panic when bootfd patches args. */
+	if (bootstr_info.bootstr_valid)
+		return bootstr_info.bootstr_buf;
+	prom_getstring(prom_chosen_node, "bootargs",
+		       bootstr_info.bootstr_buf, BARG_LEN);
+	bootstr_info.bootstr_valid = 1;
+	return bootstr_info.bootstr_buf;
+}