1 files changed, 56 insertions, 0 deletions
diff --git a/code/fe310/include/sifive/devices/prci.h b/code/fe310/include/sifive/devices/prci.h
new file mode 100644
index 0000000..1a3de58
--- /dev/null
+++ b/code/fe310/include/sifive/devices/prci.h
@@ -0,0 +1,56 @@
+// See LICENSE for license details.
+
+#ifndef _SIFIVE_PRCI_H
+#define _SIFIVE_PRCI_H
+
+/* Register offsets */
+
+#define PRCI_HFROSCCFG   (0x0000)
+#define PRCI_HFXOSCCFG   (0x0004)
+#define PRCI_PLLCFG      (0x0008)
+#define PRCI_PLLDIV      (0x000C)
+#define PRCI_PROCMONCFG  (0x00F0)
+
+/* Fields */
+#define ROSC_DIV(x)    (((x) & 0x2F) << 0 ) 
+#define ROSC_TRIM(x)   (((x) & 0x1F) << 16)
+#define ROSC_EN(x)     (((x) & 0x1 ) << 30) 
+#define ROSC_RDY(x)    (((x) & 0x1 ) << 31)
+
+#define XOSC_EN(x)     (((x) & 0x1) << 30)
+#define XOSC_RDY(x)    (((x) & 0x1) << 31)
+
+#define PLL_R(x)       (((x) & 0x7)  << 0)
+// single reserved bit for F LSB.
+#define PLL_F(x)       (((x) & 0x3F) << 4)
+#define PLL_Q(x)       (((x) & 0x3)  << 10)
+#define PLL_SEL(x)     (((x) & 0x1)  << 16)
+#define PLL_REFSEL(x)  (((x) & 0x1)  << 17)
+#define PLL_BYPASS(x)  (((x) & 0x1)  << 18)
+#define PLL_LOCK(x)    (((x) & 0x1)  << 31)
+
+#define PLL_R_default 0x1
+#define PLL_F_default 0x1F
+#define PLL_Q_default 0x3
+
+#define PLL_REFSEL_HFROSC 0x0
+#define PLL_REFSEL_HFXOSC 0x1
+
+#define PLL_SEL_HFROSC 0x0
+#define PLL_SEL_PLL    0x1
+
+#define PLL_FINAL_DIV(x)      (((x) & 0x3F) << 0)
+#define PLL_FINAL_DIV_BY_1(x) (((x) & 0x1 ) << 8)
+
+#define PROCMON_DIV(x)   (((x) & 0x1F) << 0)
+#define PROCMON_TRIM(x)  (((x) & 0x1F) << 8)
+#define PROCMON_EN(x)    (((x) & 0x1)  << 16)
+#define PROCMON_SEL(x)   (((x) & 0x3)  << 24)
+#define PROCMON_NT_EN(x) (((x) & 0x1)  << 28)
+
+#define PROCMON_SEL_HFCLK     0
+#define PROCMON_SEL_HFXOSCIN  1
+#define PROCMON_SEL_PLLOUTDIV 2
+#define PROCMON_SEL_PROCMON   3
+
+#endif // _SIFIVE_PRCI_H