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Diffstat (limited to 'arch/arm/cpu/arm926ejs/lpc32xx/cpu.c')
-rw-r--r--arch/arm/cpu/arm926ejs/lpc32xx/cpu.c70
1 files changed, 70 insertions, 0 deletions
diff --git a/arch/arm/cpu/arm926ejs/lpc32xx/cpu.c b/arch/arm/cpu/arm926ejs/lpc32xx/cpu.c
new file mode 100644
index 0000000..e29e130
--- /dev/null
+++ b/arch/arm/cpu/arm926ejs/lpc32xx/cpu.c
@@ -0,0 +1,70 @@
+/*
+ * Copyright (C) 2011 by Vladimir Zapolskiy <vz@mleia.com>
+ *
+ * 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., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301, USA.
+ */
+
+#include <common.h>
+#include <asm/arch/cpu.h>
+#include <asm/arch/clk.h>
+#include <asm/arch/wdt.h>
+#include <asm/io.h>
+
+static struct clk_pm_regs *clk = (struct clk_pm_regs *)CLK_PM_BASE;
+static struct wdt_regs *wdt = (struct wdt_regs *)WDT_BASE;
+
+void reset_cpu(ulong addr)
+{
+ /* Enable watchdog clock */
+ setbits_le32(&clk->timclk_ctrl, CLK_TIMCLK_WATCHDOG);
+
+ /* Reset pulse length is 13005 peripheral clock frames */
+ writel(13000, &wdt->pulse);
+
+ /* Force WDOG_RESET2 and RESOUT_N signal active */
+ writel(WDTIM_MCTRL_RESFRC2 | WDTIM_MCTRL_RESFRC1 | WDTIM_MCTRL_M_RES2,
+ &wdt->mctrl);
+
+ while (1)
+ /* NOP */;
+}
+
+#if defined(CONFIG_ARCH_CPU_INIT)
+int arch_cpu_init(void)
+{
+ /*
+ * It might be necessary to flush data cache, if U-boot is loaded
+ * from kickstart bootloader, e.g. from S1L loader
+ */
+ flush_dcache_all();
+
+ return 0;
+}
+#else
+#error "You have to select CONFIG_ARCH_CPU_INIT"
+#endif
+
+#if defined(CONFIG_DISPLAY_CPUINFO)
+int print_cpuinfo(void)
+{
+ printf("CPU: NXP LPC32XX\n");
+ printf("CPU clock: %uMHz\n", get_hclk_pll_rate() / 1000000);
+ printf("AHB bus clock: %uMHz\n", get_hclk_clk_rate() / 1000000);
+ printf("Peripheral clock: %uMHz\n", get_periph_clk_rate() / 1000000);
+
+ return 0;
+}
+#endif