add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/arch/powerpc/sysdev/cpm_common.c
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@@ -1,3 +1,4 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /*
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  * Common CPM code
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  *
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@@ -11,10 +12,6 @@
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  * Copyright (c) 2000 MontaVista Software, Inc (source@mvista.com)
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  * 2006 (c) MontaVista Software, Inc.
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  * Vitaly Bordug <vbordug@ru.mvista.com>
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- *
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- * This program is free software; you can redistribute it and/or modify
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- * it under the terms of version 2 of the GNU General Public License as
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- * published by the Free Software Foundation.
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  */
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 #include <linux/init.h>
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@@ -71,6 +68,8 @@
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 void __init udbg_init_cpm(void)
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 {
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 #ifdef CONFIG_PPC_8xx
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+	mmu_mapin_immr();
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+
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 	cpm_udbg_txdesc = (u32 __iomem __force *)
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 			  (CONFIG_PPC_EARLY_DEBUG_CPM_ADDR - PHYS_IMMR_BASE +
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 			   VIRT_IMMR_BASE);