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-rw-r--r--arch/mips/power/cpu.c42
1 files changed, 42 insertions, 0 deletions
diff --git a/arch/mips/power/cpu.c b/arch/mips/power/cpu.c
new file mode 100644
index 0000000000..a15e29dfc7
--- /dev/null
+++ b/arch/mips/power/cpu.c
@@ -0,0 +1,42 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Suspend support specific for mips.
+ *
+ * Copyright (C) 2009 Lemote Inc.
+ * Author: Hu Hongbing <huhb@lemote.com>
+ * Wu Zhangjin <wuzhangjin@gmail.com>
+ */
+#include <asm/sections.h>
+#include <asm/fpu.h>
+#include <asm/dsp.h>
+
+static u32 saved_status;
+struct pt_regs saved_regs;
+
+void save_processor_state(void)
+{
+ saved_status = read_c0_status();
+
+ if (is_fpu_owner())
+ save_fp(current);
+
+ save_dsp(current);
+}
+
+void restore_processor_state(void)
+{
+ write_c0_status(saved_status);
+
+ if (is_fpu_owner())
+ restore_fp(current);
+
+ restore_dsp(current);
+}
+
+int pfn_is_nosave(unsigned long pfn)
+{
+ unsigned long nosave_begin_pfn = PFN_DOWN(__pa(&__nosave_begin));
+ unsigned long nosave_end_pfn = PFN_UP(__pa(&__nosave_end));
+
+ return (pfn >= nosave_begin_pfn) && (pfn < nosave_end_pfn);
+}