Adding upstream version 6.6.15.upstream/6.6.15

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

1 files changed, 44 insertions, 0 deletions

diff --git a/arch/sparc/prom/mp.c b/arch/sparc/prom/mp.c
new file mode 100644
index 0000000000..67cf0e957e
--- /dev/null
+++ b/arch/sparc/prom/mp.c
@@ -0,0 +1,44 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * mp.c:  OpenBoot Prom Multiprocessor support routines.  Don't call
+ *        these on a UP or else you will halt and catch fire. ;)
+ *
+ * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
+ */
+
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+
+#include <asm/openprom.h>
+#include <asm/oplib.h>
+
+extern void restore_current(void);
+
+/* Start cpu with prom-tree node 'cpunode' using context described
+ * by 'ctable_reg' in context 'ctx' at program counter 'pc'.
+ *
+ * XXX Have to look into what the return values mean. XXX
+ */
+int
+prom_startcpu(int cpunode, struct linux_prom_registers *ctable_reg, int ctx, char *pc)
+{
+	int ret;
+	unsigned long flags;
+
+	spin_lock_irqsave(&prom_lock, flags);
+	switch(prom_vers) {
+	case PROM_V0:
+	case PROM_V2:
+	default:
+		ret = -1;
+		break;
+	case PROM_V3:
+		ret = (*(romvec->v3_cpustart))(cpunode, (int) ctable_reg, ctx, pc);
+		break;
+	}
+	restore_current();
+	spin_unlock_irqrestore(&prom_lock, flags);
+
+	return ret;
+}