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-rw-r--r--arch/arm/cpu/arm926ejs/at91/cpu.c73
1 files changed, 73 insertions, 0 deletions
diff --git a/arch/arm/cpu/arm926ejs/at91/cpu.c b/arch/arm/cpu/arm926ejs/at91/cpu.c
new file mode 100644
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--- /dev/null
+++ b/arch/arm/cpu/arm926ejs/at91/cpu.c
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+/*
+ * (C) Copyright 2010
+ * Reinhard Meyer, reinhard.meyer@emk-elektronik.de
+ * (C) Copyright 2009
+ * Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/arch/hardware.h>
+#include <asm/arch/at91_pmc.h>
+#include <asm/arch/at91_pit.h>
+#include <asm/arch/at91_gpbr.h>
+#include <asm/arch/clk.h>
+
+#ifndef CONFIG_SYS_AT91_MAIN_CLOCK
+#define CONFIG_SYS_AT91_MAIN_CLOCK 0
+#endif
+
+int arch_cpu_init(void)
+{
+ return at91_clock_init(CONFIG_SYS_AT91_MAIN_CLOCK);
+}
+
+void arch_preboot_os(void)
+{
+ ulong cpiv;
+ at91_pit_t *pit = (at91_pit_t *) ATMEL_BASE_PIT;
+
+ cpiv = AT91_PIT_MR_PIV_MASK(readl(&pit->piir));
+
+ /*
+ * Disable PITC
+ * Add 0x1000 to current counter to stop it faster
+ * without waiting for wrapping back to 0
+ */
+ writel(cpiv + 0x1000, &pit->mr);
+}
+
+#if defined(CONFIG_DISPLAY_CPUINFO)
+int print_cpuinfo(void)
+{
+ char buf[32];
+
+ printf("CPU: %s\n", ATMEL_CPU_NAME);
+ printf("Crystal frequency: %8s MHz\n",
+ strmhz(buf, get_main_clk_rate()));
+ printf("CPU clock : %8s MHz\n",
+ strmhz(buf, get_cpu_clk_rate()));
+ printf("Master clock : %8s MHz\n",
+ strmhz(buf, get_mck_clk_rate()));
+
+ return 0;
+}
+#endif
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