3 * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
4 * Marius Groeger <mgroeger@sysgo.de>
7 * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
8 * Alex Zuepke <azu@sysgo.de>
10 * See file CREDITS for list of people who contributed to this
13 * This program is free software; you can redistribute it and/or
14 * modify it under the terms of the GNU General Public License as
15 * published by the Free Software Foundation; either version 2 of
16 * the License, or (at your option) any later version.
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, write to the Free Software
25 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
36 #include <asm/hardware.h>
37 #include <asm/system.h>
39 #if defined(CONFIG_IMPA7) || defined(CONFIG_EP7312) || defined(CONFIG_ARMADILLO)
40 static void cache_flush(void);
46 * setup up stacks if necessary
49 IRQ_STACK_START = _armboot_start - CONFIG_SYS_MALLOC_LEN - CONFIG_SYS_GBL_DATA_SIZE - 4;
50 FIQ_STACK_START = IRQ_STACK_START - CONFIG_STACKSIZE_IRQ;
55 int cleanup_before_linux (void)
58 * this function is called just before we call linux
59 * it prepares the processor for linux
61 * we turn off caches etc ...
62 * and we set the CPU-speed to 73 MHz - see start.S for details
65 #if defined(CONFIG_IMPA7) || defined(CONFIG_EP7312) || defined(CONFIG_ARMADILLO)
66 disable_interrupts ();
68 /* turn off I-cache */
74 #ifdef CONFIG_ARM7_REVD
75 /* go to high speed */
76 IO_SYSCON3 = (IO_SYSCON3 & ~CLKCTL) | CLKCTL_73;
78 #elif defined(CONFIG_NETARM) || defined(CONFIG_S3C4510B) || defined(CONFIG_LPC2292)
79 disable_interrupts ();
80 /* Nothing more needed */
81 #elif defined(CONFIG_INTEGRATOR) && defined(CONFIG_ARCH_INTEGRATOR)
82 /* No cleanup before linux for IntegratorAP/CM720T as yet */
84 #error No cleanup_before_linux() defined for this CPU type
89 #if defined(CONFIG_IMPA7) || defined(CONFIG_EP7312) || defined(CONFIG_ARMADILLO)
91 static void cache_flush (void)
95 asm ("mcr p15, 0, %0, c7, c5, 0": :"r" (i));
97 #elif defined(CONFIG_INTEGRATOR) && defined(CONFIG_ARCH_INTEGRATOR)
98 /* No specific cache setup for IntegratorAP/CM720T as yet */
99 void icache_enable (void)