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// SPDX-License-Identifier: GPL-2.0-only
// SPDX-FileCopyrightText: 2012 Jan Luebbe <j.luebbe@pengutronix.de>, Pengutronix
/*
* mmuinfo.c - Show MMU/cache information
*/
#include <common.h>
#include <command.h>
#include <getopt.h>
#include <asm/mmuinfo.h>
#include <asm/system_info.h>
#include <zero_page.h>
#include <mmu.h>
int mmuinfo(void *addr)
{
if (IS_ENABLED(CONFIG_CPU_V8))
return mmuinfo_v8(addr);
if (IS_ENABLED(CONFIG_CPU_V7) && cpu_architecture() == CPU_ARCH_ARMv7)
return mmuinfo_v7(addr);
return -ENOSYS;
}
static __maybe_unused int do_mmuinfo(int argc, char *argv[])
{
unsigned long addr;
int access_zero_page = -1;
int opt;
while ((opt = getopt(argc, argv, "zZ")) > 0) {
switch (opt) {
case 'z':
access_zero_page = true;
break;
case 'Z':
access_zero_page = false;
break;
default:
return COMMAND_ERROR_USAGE;
}
}
if (access_zero_page >= 0) {
if (argc - optind != 0)
return COMMAND_ERROR_USAGE;
if (!zero_page_remappable()) {
pr_warn("No architecture support for zero page remap\n");
return -ENOSYS;
}
if (access_zero_page)
zero_page_access();
else
zero_page_faulting();
return 0;
}
if (argc - optind != 1)
return COMMAND_ERROR_USAGE;
addr = strtoul_suffix(argv[1], NULL, 0);
return mmuinfo((void *)addr);
}
BAREBOX_CMD_HELP_START(mmuinfo)
BAREBOX_CMD_HELP_TEXT("Show MMU/cache information using the cp15/model-specific registers.")
BAREBOX_CMD_HELP_TEXT("")
BAREBOX_CMD_HELP_TEXT("Options:")
BAREBOX_CMD_HELP_OPT ("-z", "enable access to zero page")
BAREBOX_CMD_HELP_OPT ("-Z", "disable access to zero page")
BAREBOX_CMD_HELP_END
#ifdef CONFIG_COMMAND_SUPPORT
BAREBOX_CMD_START(mmuinfo)
.cmd = do_mmuinfo,
BAREBOX_CMD_DESC("show MMU/cache information of an address")
BAREBOX_CMD_OPTS("[-zZ | ADDRESS]")
BAREBOX_CMD_GROUP(CMD_GRP_INFO)
BAREBOX_CMD_HELP(cmd_mmuinfo_help)
BAREBOX_CMD_END
#endif
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