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,
33 #include <asm/arch/pxa-regs.h>
35 #include <asm/system.h>
39 static void cache_flush(void);
41 int cleanup_before_linux (void)
44 * this function is called just before we call linux
45 * it prepares the processor for linux
47 * just disable everything that can disturb booting linux
50 disable_interrupts ();
52 /* turn off I-cache */
63 static void cache_flush (void)
67 asm ("mcr p15, 0, %0, c7, c5, 0": :"r" (i));
70 #ifndef CONFIG_CPU_MONAHANS
71 void set_GPIO_mode(int gpio_mode)
73 int gpio = gpio_mode & GPIO_MD_MASK_NR;
74 int fn = (gpio_mode & GPIO_MD_MASK_FN) >> 8;
77 /* This below changes direction setting of GPIO "gpio" */
78 val = readl(GPDR(gpio));
80 if (gpio_mode & GPIO_MD_MASK_DIR)
81 val |= GPIO_bit(gpio);
83 val &= ~GPIO_bit(gpio);
85 writel(val, GPDR(gpio));
87 /* This below updates only AF of GPIO "gpio" */
88 val = readl(GAFR(gpio));
89 val &= ~(0x3 << (((gpio) & 0xf) * 2));
90 val |= fn << (((gpio) & 0xf) * 2);
91 writel(val, GAFR(gpio));
93 #endif /* CONFIG_CPU_MONAHANS */