SPDX: Convert all of our single license tags to Linux Kernel style

[u-boot] / arch / arm / cpu / armv7 / cpu.c

diff --git a/arch/arm/cpu/armv7/cpu.c b/arch/arm/cpu/armv7/cpu.c
index c6fa8ef13617636a8c879cccbae626bf6ee8c2e1..44f27572674f61f2208be233972a1b2383a456b1 100644 (file)
--- a/arch/arm/cpu/armv7/cpu.c
+++ b/arch/arm/cpu/armv7/cpu.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * (C) Copyright 2008 Texas Insturments
  *
@@ -7,24 +8,6 @@
  *
  * (C) Copyright 2002
  * Gary Jennejohn, DENX Software Engineering, <garyj@denx.de>
- *
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
  */
 
 /*
@@ -36,15 +19,11 @@
 #include <asm/system.h>
 #include <asm/cache.h>
 #include <asm/armv7.h>
+#include <linux/compiler.h>
 
-void save_boot_params_default(u32 r0, u32 r1, u32 r2, u32 r3)
-{
-}
-
-void save_boot_params(u32 r0, u32 r1, u32 r2, u32 r3)
-       __attribute__((weak, alias("save_boot_params_default")));
+void __weak cpu_cache_initialization(void){}
 
-int cleanup_before_linux(void)
+int cleanup_before_linux_select(int flags)
 {
        /*
         * this function is called just before we call linux
@@ -56,30 +35,49 @@ int cleanup_before_linux(void)
        disable_interrupts();
 #endif
 
-       /*
-        * Turn off I-cache and invalidate it
-        */
-       icache_disable();
-       invalidate_icache_all();
+       if (flags & CBL_DISABLE_CACHES) {
+               /*
+               * turn off D-cache
+               * dcache_disable() in turn flushes the d-cache and disables MMU
+               */
+               dcache_disable();
+               v7_outer_cache_disable();
 
-       /*
-        * turn off D-cache
-        * dcache_disable() in turn flushes the d-cache and disables MMU
-        */
-       dcache_disable();
-       v7_outer_cache_disable();
+               /*
+               * After D-cache is flushed and before it is disabled there may
+               * be some new valid entries brought into the cache. We are
+               * sure that these lines are not dirty and will not affect our
+               * execution. (because unwinding the call-stack and setting a
+               * bit in CP15 SCTRL is all we did during this. We have not
+               * pushed anything on to the stack. Neither have we affected
+               * any static data) So just invalidate the entire d-cache again
+               * to avoid coherency problems for kernel
+               */
+               invalidate_dcache_all();
+
+               icache_disable();
+               invalidate_icache_all();
+       } else {
+               /*
+                * Turn off I-cache and invalidate it
+                */
+               icache_disable();
+               invalidate_icache_all();
+
+               flush_dcache_all();
+               invalidate_icache_all();
+               icache_enable();
+       }
 
        /*
-        * After D-cache is flushed and before it is disabled there may
-        * be some new valid entries brought into the cache. We are sure
-        * that these lines are not dirty and will not affect our execution.
-        * (because unwinding the call-stack and setting a bit in CP15 SCTRL
-        * is all we did during this. We have not pushed anything on to the
-        * stack. Neither have we affected any static data)
-        * So just invalidate the entire d-cache again to avoid coherency
-        * problems for kernel
+        * Some CPU need more cache attention before starting the kernel.
         */
-       invalidate_dcache_all();
+       cpu_cache_initialization();
 
        return 0;
 }
+
+int cleanup_before_linux(void)
+{
+       return cleanup_before_linux_select(CBL_ALL);
+}