| /* |
| * (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> |
| * |
| * SPDX-License-Identifier: GPL-2.0+ |
| */ |
| |
| /* |
| * CPU specific code |
| */ |
| |
| #include <common.h> |
| #include <command.h> |
| #include <asm/system.h> |
| #include <asm/io.h> |
| |
| static void cache_flush(void); |
| |
| int cleanup_before_linux (void) |
| { |
| /* |
| * this function is called just before we call linux |
| * it prepares the processor for linux |
| * |
| * we turn off caches etc ... |
| */ |
| |
| disable_interrupts (); |
| |
| /* ARM926E-S needs the protection unit enabled for the icache to have |
| * been enabled - left for possible later use |
| * should turn off the protection unit as well.... |
| */ |
| /* turn off I/D-cache */ |
| icache_disable(); |
| dcache_disable(); |
| /* flush I/D-cache */ |
| cache_flush(); |
| |
| return 0; |
| } |
| |
| /* flush I/D-cache */ |
| static void cache_flush (void) |
| { |
| unsigned long i = 0; |
| |
| asm ("mcr p15, 0, %0, c7, c5, 0": :"r" (i)); |
| asm ("mcr p15, 0, %0, c7, c6, 0": :"r" (i)); |
| } |
| |
| #ifndef CONFIG_INTEGRATOR |
| |
| __attribute__((noreturn)) void reset_cpu(ulong addr __attribute__((unused))) |
| { |
| writew(0x0, 0xfffece10); |
| writew(0x8, 0xfffece10); |
| for (;;) |
| ; |
| } |
| |
| #endif /* #ifdef CONFIG_INTEGRATOR */ |
