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https://github.com/brain-hackers/u-boot-brain
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![Harald Seiler](/assets/img/avatar_default.png)
Historically, the reset_cpu() function had an `addr` parameter which was meant to pass in an address of the reset vector location, where the CPU should reset to. This feature is no longer used anywhere in U-Boot as all reset_cpu() implementations now ignore the passed value. Generic code has been added which always calls reset_cpu() with `0` which means this feature can no longer be used easily anyway. Over time, many implementations seem to have "misunderstood" the existence of this parameter as a way to customize/parameterize the reset (e.g. COLD vs WARM resets). As this is not properly supported, the code will almost always not do what it is intended to (because all call-sites just call reset_cpu() with 0). To avoid confusion and to clean up the codebase from unused left-overs of the past, remove the `addr` parameter entirely. Code which intends to support different kinds of resets should be rewritten as a sysreset driver instead. This transformation was done with the following coccinelle patch: @@ expression argvalue; @@ - reset_cpu(argvalue) + reset_cpu() @@ identifier argname; type argtype; @@ - reset_cpu(argtype argname) + reset_cpu(void) { ... } Signed-off-by: Harald Seiler <hws@denx.de> Reviewed-by: Simon Glass <sjg@chromium.org>
37 lines
846 B
C
37 lines
846 B
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (c) 2010 Samsung Electronics.
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* Minkyu Kang <mk7.kang@samsung.com>
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*/
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#include <common.h>
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#include <cpu_func.h>
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#include <asm/cache.h>
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#include <asm/io.h>
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#include <asm/system.h>
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#ifdef CONFIG_TARGET_ESPRESSO7420
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/*
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* Exynos7420 uses CPU0 of Cluster-1 as boot CPU. Due to this, branch_if_master
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* fails to identify as the boot CPU as the master CPU. As temporary workaround,
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* setup the slave CPU boot address as "_main".
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*/
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extern void _main(void);
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void *secondary_boot_addr = (void *)_main;
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#endif /* CONFIG_TARGET_ESPRESSO7420 */
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void reset_cpu(void)
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{
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#ifdef CONFIG_CPU_V7A
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writel(0x1, samsung_get_base_swreset());
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#endif
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}
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#if !CONFIG_IS_ENABLED(SYS_DCACHE_OFF)
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void enable_caches(void)
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{
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/* Enable D-cache. I-cache is already enabled in start.S */
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dcache_enable();
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}
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#endif
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