1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * (C) Copyright 2008 Texas Insturments 4 * 5 * (C) Copyright 2002 6 * Sysgo Real-Time Solutions, GmbH <www.elinos.com> 7 * Marius Groeger <mgroeger@sysgo.de> 8 * 9 * (C) Copyright 2002 10 * Gary Jennejohn, DENX Software Engineering, <garyj@denx.de> 11 */ 12 13 #include <common.h> 14 #include <command.h> 15 #include <cpu_func.h> 16 #include <irq_func.h> 17 #include <asm/system.h> 18 #include <asm/secure.h> 19 #include <linux/compiler.h> 20 21 /* 22 * sdelay() - simple spin loop. 23 * 24 * Will delay execution by roughly (@loops * 2) cycles. 25 * This is necessary to be used before timers are accessible. 26 * 27 * A value of "0" will results in 2^64 loops. 28 */ sdelay(unsigned long loops)29void sdelay(unsigned long loops) 30 { 31 __asm__ volatile ("1:\n" "subs %0, %0, #1\n" 32 "b.ne 1b" : "=r" (loops) : "0"(loops) : "cc"); 33 } 34 cleanup_before_linux(void)35int cleanup_before_linux(void) 36 { 37 /* 38 * this function is called just before we call linux 39 * it prepares the processor for linux 40 * 41 * disable interrupt and turn off caches etc ... 42 */ 43 disable_interrupts(); 44 45 /* 46 * Turn off I-cache and invalidate it 47 */ 48 icache_disable(); 49 invalidate_icache_all(); 50 51 /* 52 * turn off D-cache 53 * dcache_disable() in turn flushes the d-cache and disables MMU 54 */ 55 dcache_disable(); 56 invalidate_dcache_all(); 57 58 return 0; 59 } 60 61 #ifdef CONFIG_ARMV8_PSCI relocate_secure_section(void)62static void relocate_secure_section(void) 63 { 64 #ifdef CONFIG_ARMV8_SECURE_BASE 65 size_t sz = __secure_end - __secure_start; 66 67 memcpy((void *)CONFIG_ARMV8_SECURE_BASE, __secure_start, sz); 68 flush_dcache_range(CONFIG_ARMV8_SECURE_BASE, 69 CONFIG_ARMV8_SECURE_BASE + sz + 1); 70 invalidate_icache_all(); 71 #endif 72 } 73 armv8_setup_psci(void)74void armv8_setup_psci(void) 75 { 76 relocate_secure_section(); 77 secure_ram_addr(psci_setup_vectors)(); 78 secure_ram_addr(psci_arch_init)(); 79 } 80 #endif 81