Initial commit: OpenHarmony-v4.0-ReleaseOpenHarmony-v4.0-Release

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 000000000..a15e29dfc
--- /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);
+}