syscon: Add flag to indicate the timebase frequency

This adds a flag (currently not set) to indicate that the core is using
the architected timebase frequency of 512Mhz. When not set, the core is
using the proc frequency for the timebase.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

diff --git a/include/microwatt_soc.h b/include/microwatt_soc.h
index 4d61d27ff6ce110d59f3f5569d3e046aecd48651..a224d7486e0ae8406d9bd8be3b19c25c7b8f838d 100644 (file)
--- a/include/microwatt_soc.h
+++ b/include/microwatt_soc.h
@@ -39,6 +39,7 @@
 #define   SYS_REG_INFO_HAS_LITEETH             (1ull << 4)
 #define   SYS_REG_INFO_HAS_LARGE_SYSCON                (1ull << 5)
 #define   SYS_REG_INFO_HAS_UART1               (1ull << 6)
+#define   SYS_REG_INFO_HAS_ARTB                 (1ull << 7)
 #define SYS_REG_BRAMINFO               0x10
 #define   SYS_REG_BRAMINFO_SIZE_MASK           0xfffffffffffffull
 #define SYS_REG_DRAMINFO               0x18

diff --git a/syscon.vhdl b/syscon.vhdl
index 05f95a7eada9529e99d54235c8b0783b0d631465..31d8d0ae8d907d8cdb2968e68d1741dfe88cfb7b 100644 (file)
--- a/syscon.vhdl
+++ b/syscon.vhdl
@@ -64,6 +64,7 @@ architecture behaviour of syscon is
     constant SYS_REG_INFO_HAS_LETH    : integer := 4;  -- Has LiteEth ethernet
     constant SYS_REG_INFO_HAS_LSYS    : integer := 5;  -- Has 6-bit address syscon
     constant SYS_REG_INFO_HAS_URT1    : integer := 6;  -- Has second UART
+    constant SYS_REG_INFO_HAS_ARTB    : integer := 7;  -- Has architected TB frequency
 
     -- BRAMINFO contains the BRAM size in the bottom 52 bits
     -- DRAMINFO contains the DRAM size if any in the bottom 52 bits