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https://github.com/AsahiLinux/u-boot
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92 lines
2.5 KiB
C
92 lines
2.5 KiB
C
/*
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* (C) Copyright 2009
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* Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include <common.h>
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#ifdef CONFIG_AT91_LEGACY
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#warning Your board is using legacy SoC access. Please update!
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#endif
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#include <asm/arch/hardware.h>
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#include <asm/arch/at91_pmc.h>
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#include <asm/arch/clk.h>
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#include <asm/arch/io.h>
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#ifndef CONFIG_SYS_AT91_MAIN_CLOCK
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#define CONFIG_SYS_AT91_MAIN_CLOCK 0
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#endif
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/*
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* The at91sam9260 has 4 GPBR (0-3), we'll use the last one, nr 3,
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* to keep track of the bootcount.
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*/
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#define AT91_GPBR_BOOTCOUNT_REGISTER 3
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#define AT91_BOOTCOUNT_ADDRESS (AT91_GPBR + 4*AT91_GPBR_BOOTCOUNT_REGISTER)
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int arch_cpu_init(void)
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{
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return at91_clock_init(CONFIG_SYS_AT91_MAIN_CLOCK);
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}
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#if defined(CONFIG_DISPLAY_CPUINFO)
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int print_cpuinfo(void)
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{
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char buf[32];
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printf("CPU: %s\n", CONFIG_SYS_AT91_CPU_NAME);
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printf("Crystal frequency: %8s MHz\n",
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strmhz(buf, get_main_clk_rate()));
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printf("CPU clock : %8s MHz\n",
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strmhz(buf, get_cpu_clk_rate()));
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printf("Master clock : %8s MHz\n",
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strmhz(buf, get_mck_clk_rate()));
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return 0;
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}
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#endif
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#ifdef CONFIG_BOOTCOUNT_LIMIT
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/*
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* Just as the mpc5xxx, we combine the BOOTCOUNT_MAGIC and boocount
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* in one 32-bit register. This is done, as the AT91SAM9260 only has
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* 4 GPBR.
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*/
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void bootcount_store (ulong a)
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{
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volatile ulong *save_addr =
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(volatile ulong *)(AT91_BASE_SYS + AT91_BOOTCOUNT_ADDRESS);
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*save_addr = (BOOTCOUNT_MAGIC & 0xffff0000) | (a & 0x0000ffff);
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}
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ulong bootcount_load (void)
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{
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volatile ulong *save_addr =
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(volatile ulong *)(AT91_BASE_SYS + AT91_BOOTCOUNT_ADDRESS);
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if ((*save_addr & 0xffff0000) != (BOOTCOUNT_MAGIC & 0xffff0000))
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return 0;
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else
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return (*save_addr & 0x0000ffff);
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}
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#endif /* CONFIG_BOOTCOUNT_LIMIT */
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