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// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2008 Texas Insturments
*
* (C) Copyright 2002
* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
* Marius Groeger <mgroeger@sysgo.de>
*
* (C) Copyright 2002
* Gary Jennejohn, DENX Software Engineering, <garyj@denx.de>
*/
#include <command.h>
#include <cpu_func.h>
#include <irq_func.h>
#include <asm/cache.h>
#include <asm/system.h>
#include <asm/secure.h>
#include <linux/compiler.h>
/*
* sdelay() - simple spin loop.
*
* Will delay execution by roughly (@loops * 2) cycles.
* This is necessary to be used before timers are accessible.
*
* A value of "0" will results in 2^64 loops.
*/
void sdelay(unsigned long loops)
{
__asm__ volatile ("1:\n" "subs %0, %0, #1\n"
"b.ne 1b" : "=r" (loops) : "0"(loops) : "cc");
}
void __weak board_cleanup_before_linux(void){}
int cleanup_before_linux(void)
{
/*
* this function is called just before we call linux
* it prepares the processor for linux
*
* disable interrupt and turn off caches etc ...
*/
board_cleanup_before_linux();
disable_interrupts();
if (IS_ENABLED(CONFIG_CMO_BY_VA_ONLY)) {
/*
* Disable D-cache.
*/
dcache_disable();
} else {
/*
* Turn off I-cache and invalidate it
*/
icache_disable();
invalidate_icache_all();
/*
* turn off D-cache
* dcache_disable() in turn flushes the d-cache and disables
* MMU
*/
dcache_disable();
invalidate_dcache_all();
}
return 0;
}
#ifdef CONFIG_ARMV8_PSCI
static void relocate_secure_section(void)
{
#ifdef CONFIG_ARMV8_SECURE_BASE
size_t sz = __secure_end - __secure_start;
memcpy((void *)CONFIG_ARMV8_SECURE_BASE, __secure_start, sz);
flush_dcache_range(CONFIG_ARMV8_SECURE_BASE,
CONFIG_ARMV8_SECURE_BASE + sz + 1);
invalidate_icache_all();
#endif
}
void armv8_setup_psci(void)
{
if (current_el() != 3)
return;
relocate_secure_section();
secure_ram_addr(psci_setup_vectors)();
secure_ram_addr(psci_arch_init)();
}
#endif
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