1 files changed, 63 insertions, 0 deletions

diff --git a/arch/sparc/prom/bootstr.c b/arch/sparc/prom/bootstr.c
new file mode 100644
index 000000000000..cfdeac2788d1
--- /dev/null
+++ b/arch/sparc/prom/bootstr.c
@@ -0,0 +1,63 @@
+/* $Id: bootstr.c,v 1.20 2000/02/08 20:24:23 davem Exp $
+ * bootstr.c:  Boot string/argument acquisition from the PROM.
+ *
+ * Copyright(C) 1995 David S. Miller (davem@caip.rutgers.edu)
+ */
+
+#include <linux/string.h>
+#include <asm/oplib.h>
+#include <asm/sun4prom.h>
+#include <linux/init.h>
+
+#define BARG_LEN  256
+static char barg_buf[BARG_LEN] = { 0 };
+static char fetched __initdata = 0;
+
+extern linux_sun4_romvec *sun4_romvec;
+
+char * __init
+prom_getbootargs(void)
+{
+        int iter;
+        char *cp, *arg;
+
+        /* This check saves us from a panic when bootfd patches args. */
+        if (fetched) {
+                return barg_buf;
+        }
+
+        switch(prom_vers) {
+        case PROM_V0:
+        case PROM_SUN4:
+                cp = barg_buf;
+                /* Start from 1 and go over fd(0,0,0)kernel */
+                for(iter = 1; iter < 8; iter++) {
+                        arg = (*(romvec->pv_v0bootargs))->argv[iter];
+                        if(arg == 0) break;
+                        while(*arg != 0) {
+                                /* Leave place for space and null. */
+                                if(cp >= barg_buf + BARG_LEN-2){
+                                        /* We might issue a warning here. */
+                                        break;
+                                }
+                                *cp++ = *arg++;
+                        }
+                        *cp++ = ' ';
+                }
+                *cp = 0;
+                break;
+        case PROM_V2:
+        case PROM_V3:
+                /*
+                 * V3 PROM cannot supply as with more than 128 bytes
+                 * of an argument. But a smart bootstrap loader can.
+                 */
+                strlcpy(barg_buf, *romvec->pv_v2bootargs.bootargs, sizeof(barg_buf));
+                break;
+        default:
+                break;
+        }
+
+        fetched = 1;
+        return barg_buf;
+}