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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>
38 lines
678 B
C
38 lines
678 B
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) 2018 Xilinx, Inc. (Michal Simek)
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*/
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#include <common.h>
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#include <cpu_func.h>
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#include <init.h>
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#include <asm/armv7_mpu.h>
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#include <asm/global_data.h>
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DECLARE_GLOBAL_DATA_PTR;
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struct mpu_region_config region_config[] = {
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{ 0x00000000, REGION_0, XN_EN, PRIV_RW_USR_RW,
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SHARED_WRITE_BUFFERED, REGION_4GB },
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{ 0x00000000, REGION_1, XN_DIS, PRIV_RW_USR_RW,
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O_I_WB_RD_WR_ALLOC, REGION_1GB },
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};
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int arch_cpu_init(void)
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{
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gd->cpu_clk = CONFIG_CPU_FREQ_HZ;
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setup_mpu_regions(region_config, ARRAY_SIZE(region_config));
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return 0;
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}
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/*
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* Perform the low-level reset.
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*/
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void reset_cpu(void)
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{
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while (1)
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;
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}
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