Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / u-boot / arch / powerpc / cpu / mpc5xx / speed.c

diff --git a/qemu/roms/u-boot/arch/powerpc/cpu/mpc5xx/speed.c b/qemu/roms/u-boot/arch/powerpc/cpu/mpc5xx/speed.c
new file mode 100644 (file)
index 0000000..24b9026
--- /dev/null
+++ b/qemu/roms/u-boot/arch/powerpc/cpu/mpc5xx/speed.c
@@ -0,0 +1,52 @@
+/*
+ * (C) Copyright 2003
+ * Martin Winistoerfer, martinwinistoerfer@gmx.ch.
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+/*
+ * File:               speed.c
+ *
+ * Discription:                Provides cpu speed calculation
+ *
+ */
+
+#include <common.h>
+#include <mpc5xx.h>
+#include <asm/processor.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+/*
+ * Get cpu and bus clock
+ */
+int get_clocks (void)
+{
+       volatile immap_t *immr = (immap_t *) CONFIG_SYS_IMMR;
+
+#ifndef        CONFIG_5xx_GCLK_FREQ
+       uint divf = (immr->im_clkrst.car_plprcr & PLPRCR_DIVF_MSK);
+       uint mf = ((immr->im_clkrst.car_plprcr & PLPRCR_MF_MSK) >> PLPRCR_MF_SHIFT);
+       ulong vcoout;
+
+       vcoout = (CONFIG_SYS_OSC_CLK / (divf + 1)) * (mf + 1) * 2;
+       if(immr->im_clkrst.car_plprcr & PLPRCR_CSRC_MSK) {
+               gd->cpu_clk = vcoout / (2^(((immr->im_clkrst.car_sccr & SCCR_DFNL_MSK) >> SCCR_DFNL_SHIFT) + 1));
+       } else {
+               gd->cpu_clk = vcoout / (2^(immr->im_clkrst.car_sccr & SCCR_DFNH_MSK));
+       }
+
+#else /* CONFIG_5xx_GCLK_FREQ */
+       gd->bus_clk = CONFIG_5xx_GCLK_FREQ;
+#endif /* CONFIG_5xx_GCLK_FREQ */
+
+       if ((immr->im_clkrst.car_sccr & SCCR_EBDF11) == 0) {
+               /* No Bus Divider active */
+               gd->bus_clk = gd->cpu_clk;
+       } else {
+               /* CLKOUT is GCLK / 2 */
+               gd->bus_clk = gd->cpu_clk / 2;
+       }
+       return (0);
+}