Add AMD Family 10 support to cpu folder

[coreboot.git] / src / cpu / amd / agesa / apic_timer.c

diff --git a/src/cpu/amd/agesa/apic_timer.c b/src/cpu/amd/agesa/apic_timer.c
new file mode 100755 (executable)
index 0000000..ec6ddd5
--- /dev/null
+++ b/src/cpu/amd/agesa/apic_timer.c
@@ -0,0 +1,59 @@
+/*
+ *****************************************************************************
+ *
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2011 Advanced Micro Devices, Inc.
+ *
+ * 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; version 2 of the License.
+ *
+ * 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 St, Fifth Floor, Boston, MA  02110-1301 USA
+ * ***************************************************************************
+ *
+ */
+
+#include <stdint.h>
+#include <delay.h>
+#include <cpu/x86/msr.h>
+#include <cpu/x86/lapic.h>
+
+/* NOTE: We use the APIC TIMER register is to hold flags for AP init during
+ * pre-memory init (__PRE_RAM__). Don't use init_timer() and  udelay is
+ * redirected to udelay_tsc().
+ */
+
+
+void init_timer(void)
+{
+       /* Set the apic timer to no interrupts and periodic mode */
+       lapic_write(LAPIC_LVTT, (1 << 17)|(1<< 16)|(0 << 12)|(0 << 0));
+
+       /* Set the divider to 1, no divider */
+       lapic_write(LAPIC_TDCR, LAPIC_TDR_DIV_1);
+
+       /* Set the initial counter to 0xffffffff */
+       lapic_write(LAPIC_TMICT, 0xffffffff);
+
+}
+
+
+void udelay(u32 usecs)
+{
+       u32 start, value, ticks;
+       /* Calculate the number of ticks to run, our FSB runs a 200Mhz */
+       ticks = usecs * 200;
+       start = lapic_read(LAPIC_TMCCT);
+       do {
+               value = lapic_read(LAPIC_TMCCT);
+       } while((start - value) < ticks);
+
+}