Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / u-boot / arch / sh / lib / time.c

diff --git a/qemu/roms/u-boot/arch/sh/lib/time.c b/qemu/roms/u-boot/arch/sh/lib/time.c
new file mode 100644 (file)
index 0000000..d970a1e
--- /dev/null
+++ b/qemu/roms/u-boot/arch/sh/lib/time.c
@@ -0,0 +1,58 @@
+/*
+ * (C) Copyright 2009
+ * Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
+ *
+ * (C) Copyright 2007-2012
+ * Nobobuhiro Iwamatsu <iwamatsu@nigauri.org>
+ *
+ * (C) Copyright 2003
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/processor.h>
+#include <asm/io.h>
+#include <sh_tmu.h>
+
+#define TCR_TPSC 0x07
+
+static struct tmu_regs *tmu = (struct tmu_regs *)TMU_BASE;
+
+unsigned long get_tbclk(void)
+{
+       u16 tmu_bit = (ffs(CONFIG_SYS_TMU_CLK_DIV) >> 1) - 1;
+       return get_tmu0_clk_rate() >> ((tmu_bit + 1) * 2);
+}
+
+unsigned long timer_read_counter(void)
+{
+       return ~readl(&tmu->tcnt0);
+}
+
+static void tmu_timer_start(unsigned int timer)
+{
+       if (timer > 2)
+               return;
+       writeb(readb(&tmu->tstr) | (1 << timer), &tmu->tstr);
+}
+
+static void tmu_timer_stop(unsigned int timer)
+{
+       if (timer > 2)
+               return;
+       writeb(readb(&tmu->tstr) & ~(1 << timer), &tmu->tstr);
+}
+
+int timer_init(void)
+{
+       u16 tmu_bit = (ffs(CONFIG_SYS_TMU_CLK_DIV) >> 1) - 1;
+       writew((readw(&tmu->tcr0) & ~TCR_TPSC) | tmu_bit, &tmu->tcr0);
+
+       tmu_timer_stop(0);
+       tmu_timer_start(0);
+
+       return 0;
+}
+