3 * Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
5 * See file CREDITS for list of people who contributed to this
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
25 #ifdef CONFIG_AT91_LEGACY
26 #warning Your board is using legacy SoC access. Please update!
29 #include <asm/arch/hardware.h>
30 #include <asm/arch/at91_pmc.h>
31 #include <asm/arch/clk.h>
32 #include <asm/arch/io.h>
34 #ifndef CONFIG_SYS_AT91_MAIN_CLOCK
35 #define CONFIG_SYS_AT91_MAIN_CLOCK 0
39 * The at91sam9260 has 4 GPBR (0-3), we'll use the last one, nr 3,
40 * to keep track of the bootcount.
42 #define AT91_GPBR_BOOTCOUNT_REGISTER 3
43 #define AT91_BOOTCOUNT_ADDRESS (AT91_GPBR + 4*AT91_GPBR_BOOTCOUNT_REGISTER)
45 int arch_cpu_init(void)
47 return at91_clock_init(CONFIG_SYS_AT91_MAIN_CLOCK);
50 #if defined(CONFIG_DISPLAY_CPUINFO)
51 int print_cpuinfo(void)
55 printf("CPU: %s\n", CONFIG_SYS_AT91_CPU_NAME);
56 printf("Crystal frequency: %8s MHz\n",
57 strmhz(buf, get_main_clk_rate()));
58 printf("CPU clock : %8s MHz\n",
59 strmhz(buf, get_cpu_clk_rate()));
60 printf("Master clock : %8s MHz\n",
61 strmhz(buf, get_mck_clk_rate()));
67 #ifdef CONFIG_BOOTCOUNT_LIMIT
69 * Just as the mpc5xxx, we combine the BOOTCOUNT_MAGIC and boocount
70 * in one 32-bit register. This is done, as the AT91SAM9260 only has
73 void bootcount_store (ulong a)
75 volatile ulong *save_addr =
76 (volatile ulong *)(AT91_BASE_SYS + AT91_BOOTCOUNT_ADDRESS);
78 *save_addr = (BOOTCOUNT_MAGIC & 0xffff0000) | (a & 0x0000ffff);
81 ulong bootcount_load (void)
83 volatile ulong *save_addr =
84 (volatile ulong *)(AT91_BASE_SYS + AT91_BOOTCOUNT_ADDRESS);
86 if ((*save_addr & 0xffff0000) != (BOOTCOUNT_MAGIC & 0xffff0000))
89 return (*save_addr & 0x0000ffff);
92 #endif /* CONFIG_BOOTCOUNT_LIMIT */