mirror of
https://github.com/AsahiLinux/u-boot
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83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
110 lines
2.2 KiB
C
110 lines
2.2 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* (C) Copyright 2004 Texas Insturments
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*
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* (C) Copyright 2002
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* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
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* Marius Groeger <mgroeger@sysgo.de>
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*
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* (C) Copyright 2002
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* Gary Jennejohn, DENX Software Engineering, <garyj@denx.de>
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*/
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/*
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* CPU specific code
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*/
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#include <common.h>
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#include <command.h>
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#include <asm/system.h>
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static void cache_flush(void);
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int cleanup_before_linux (void)
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{
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/*
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* this function is called just before we call linux
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* it prepares the processor for linux
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*
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* we turn off caches etc ...
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*/
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disable_interrupts ();
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/* turn off I/D-cache */
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icache_disable();
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dcache_disable();
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/* flush I/D-cache */
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cache_flush();
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return 0;
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}
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static void cache_flush(void)
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{
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unsigned long i = 0;
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/* clean entire data cache */
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asm volatile("mcr p15, 0, %0, c7, c10, 0" : : "r" (i));
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/* invalidate both caches and flush btb */
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asm volatile("mcr p15, 0, %0, c7, c7, 0" : : "r" (i));
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/* mem barrier to sync things */
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asm volatile("mcr p15, 0, %0, c7, c10, 4" : : "r" (i));
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}
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#ifndef CONFIG_SYS_DCACHE_OFF
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void invalidate_dcache_all(void)
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{
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asm volatile("mcr p15, 0, %0, c7, c6, 0" : : "r" (0));
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}
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void flush_dcache_all(void)
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{
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asm volatile("mcr p15, 0, %0, c7, c10, 0" : : "r" (0));
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asm volatile("mcr p15, 0, %0, c7, c10, 4" : : "r" (0));
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}
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void invalidate_dcache_range(unsigned long start, unsigned long stop)
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{
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if (!check_cache_range(start, stop))
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return;
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while (start < stop) {
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asm volatile("mcr p15, 0, %0, c7, c6, 1" : : "r" (start));
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start += CONFIG_SYS_CACHELINE_SIZE;
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}
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}
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void flush_dcache_range(unsigned long start, unsigned long stop)
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{
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if (!check_cache_range(start, stop))
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return;
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while (start < stop) {
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asm volatile("mcr p15, 0, %0, c7, c14, 1" : : "r" (start));
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start += CONFIG_SYS_CACHELINE_SIZE;
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}
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asm volatile("mcr p15, 0, %0, c7, c10, 4" : : "r" (0));
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}
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#else /* #ifndef CONFIG_SYS_DCACHE_OFF */
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void invalidate_dcache_all(void)
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{
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}
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void flush_dcache_all(void)
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{
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}
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#endif /* #ifndef CONFIG_SYS_DCACHE_OFF */
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#if !defined(CONFIG_SYS_ICACHE_OFF) || !defined(CONFIG_SYS_DCACHE_OFF)
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void enable_caches(void)
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{
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#ifndef CONFIG_SYS_ICACHE_OFF
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icache_enable();
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#endif
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#ifndef CONFIG_SYS_DCACHE_OFF
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dcache_enable();
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#endif
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}
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#endif
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