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 <asm/system.h> 16 #include <asm/secure.h> 17 #include <linux/compiler.h> 18 19 /* 20 * sdelay() - simple spin loop. 21 * 22 * Will delay execution by roughly (@loops * 2) cycles. 23 * This is necessary to be used before timers are accessible. 24 * 25 * A value of "0" will results in 2^64 loops. 26 */ sdelay(unsigned long loops)27 void sdelay(unsigned long loops) 28 { 29 __asm__ volatile ("1:\n" "subs %0, %0, #1\n" 30 "b.ne 1b" : "=r" (loops) : "0"(loops) : "cc"); 31 } 32 cleanup_before_linux(void)33 int cleanup_before_linux(void) 34 { 35 /* 36 * this function is called just before we call linux 37 * it prepares the processor for linux 38 * 39 * disable interrupt and turn off caches etc ... 40 */ 41 disable_interrupts(); 42 43 /* 44 * Turn off I-cache and invalidate it 45 */ 46 icache_disable(); 47 invalidate_icache_all(); 48 49 /* 50 * turn off D-cache 51 * dcache_disable() in turn flushes the d-cache and disables MMU 52 */ 53 dcache_disable(); 54 invalidate_dcache_all(); 55 56 return 0; 57 } 58 59 #ifdef CONFIG_ARMV8_PSCI relocate_secure_section(void)60 static void relocate_secure_section(void) 61 { 62 #ifdef CONFIG_ARMV8_SECURE_BASE 63 size_t sz = __secure_end - __secure_start; 64 65 memcpy((void *)CONFIG_ARMV8_SECURE_BASE, __secure_start, sz); 66 flush_dcache_range(CONFIG_ARMV8_SECURE_BASE, 67 CONFIG_ARMV8_SECURE_BASE + sz + 1); 68 invalidate_icache_all(); 69 #endif 70 } 71 armv8_setup_psci(void)72 void armv8_setup_psci(void) 73 { 74 relocate_secure_section(); 75 secure_ram_addr(psci_setup_vectors)(); 76 secure_ram_addr(psci_arch_init)(); 77 } 78 #endif 79