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>
42 * setup up stacks if necessary
45 IRQ_STACK_START = _armboot_start - CONFIG_SYS_MALLOC_LEN - CONFIG_SYS_GBL_DATA_SIZE - 4;
46 FIQ_STACK_START = IRQ_STACK_START - CONFIG_STACKSIZE_IRQ;
51 int cleanup_before_linux (void)
54 * this function is called just before we call linux
55 * it prepares the processor for linux
57 * we turn off caches etc ...
58 * and we set the CPU-speed to 73 MHz - see start.S for details
61 #if defined(CONFIG_IMPA7) || defined(CONFIG_EP7312) || defined(CONFIG_ARMADILLO)
64 disable_interrupts ();
66 /* turn off I-cache */
67 asm ("mrc p15, 0, %0, c1, c0, 0":"=r" (i));
69 asm ("mcr p15, 0, %0, c1, c0, 0": :"r" (i));
72 asm ("mcr p15, 0, %0, c7, c5, 0": :"r" (i));
73 #ifdef CONFIG_ARM7_REVD
74 /* go to high speed */
75 IO_SYSCON3 = (IO_SYSCON3 & ~CLKCTL) | CLKCTL_73;
77 #elif defined(CONFIG_NETARM) || defined(CONFIG_S3C4510B) || defined(CONFIG_LPC2292)
78 disable_interrupts ();
79 /* Nothing more needed */
80 #elif defined(CONFIG_INTEGRATOR) && defined(CONFIG_ARCH_INTEGRATOR)
81 /* No cleanup before linux for IntegratorAP/CM720T as yet */
83 #error No cleanup_before_linux() defined for this CPU type
88 int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
90 disable_interrupts ();
97 * Instruction and Data cache enable and disable functions
101 #if defined(CONFIG_IMPA7) || defined(CONFIG_EP7312) || defined(CONFIG_NETARM) || defined(CONFIG_ARMADILLO)
102 static void cp_delay (void)
106 /* copro seems to need some delay between reading and writing */
107 for (i = 0; i < 100; i++);
110 void icache_enable (void)
119 void icache_disable (void)
125 set_cr (reg & ~CR_C);
128 int icache_status (void)
130 return (get_cr () & CR_C) != 0;
133 void dcache_enable (void)
142 void dcache_disable (void)
148 set_cr (reg & ~CR_C);
151 int dcache_status (void)
153 return (get_cr () & CR_C) != 0;
155 #elif defined(CONFIG_INTEGRATOR) && defined(CONFIG_ARCH_INTEGRATOR)
156 /* No specific cache setup for IntegratorAP/CM720T as yet */
157 void icache_enable (void)