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syscon: Add flag to indicate the timebase frequency

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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>
This commit is contained in:
Benjamin Herrenschmidt 2020-06-23 15:44:37 +10:00
parent d654667304
commit b230677e93
2 changed files with 2 additions and 0 deletions
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1
include/microwatt_soc.h
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@ -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

1
syscon.vhdl
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@ -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