// 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 <common.h> #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(); /* * 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