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| author | Josh Blum <josh@joshknows.com> | 2011-03-17 13:28:24 -0700 |
|---|---|---|
| committer | Josh Blum <josh@joshknows.com> | 2011-03-17 13:28:24 -0700 |
| commit | be2c1b95c1d6f4ad2ea663bb926a04463edb9358 (patch) | |
| tree | 08efc2c4a98d06d600110efc7c88982a493b16cd /usrp2/opencores/zpu/core | |
| parent | 37fa8da55ecc1a51c63982c3d75aef725f99bf55 (diff) | |
| download | uhd-be2c1b95c1d6f4ad2ea663bb926a04463edb9358.tar.gz uhd-be2c1b95c1d6f4ad2ea663bb926a04463edb9358.tar.bz2 uhd-be2c1b95c1d6f4ad2ea663bb926a04463edb9358.zip | |
reverted zpu stack pointer change, incremented fpga compat number
Diffstat (limited to 'usrp2/opencores/zpu/core')
| -rw-r--r-- | usrp2/opencores/zpu/core/zpu_config.vhd | 5 | ||||
| -rw-r--r-- | usrp2/opencores/zpu/core/zpu_core.vhd | 3 | ||||
| -rw-r--r-- | usrp2/opencores/zpu/core/zpupkg.vhd | 1 |
3 files changed, 6 insertions, 3 deletions
diff --git a/usrp2/opencores/zpu/core/zpu_config.vhd b/usrp2/opencores/zpu/core/zpu_config.vhd index b7e894232..f7743d602 100644 --- a/usrp2/opencores/zpu/core/zpu_config.vhd +++ b/usrp2/opencores/zpu/core/zpu_config.vhd @@ -12,4 +12,9 @@ package zpu_config is constant ZPU_Frequency : std_logic_vector(7 downto 0) := x"40";
-- This is the msb address bit. bytes=2^(maxAddrBitIncIO+1)
constant maxAddrBitIncIO : integer := 15;
+
+ -- start byte address of stack.
+ -- point to top of RAM - 2*words
+ constant spStart : std_logic_vector(maxAddrBitIncIO downto 0) := x"3ff8";
+
end zpu_config;
diff --git a/usrp2/opencores/zpu/core/zpu_core.vhd b/usrp2/opencores/zpu/core/zpu_core.vhd index 24586b2f6..2450f14d3 100644 --- a/usrp2/opencores/zpu/core/zpu_core.vhd +++ b/usrp2/opencores/zpu/core/zpu_core.vhd @@ -26,7 +26,6 @@ entity zpu_core is mem_write : out std_logic_vector(wordSize-1 downto 0); out_mem_addr : out std_logic_vector(maxAddrBitIncIO downto 0); mem_writeMask: out std_logic_vector(wordBytes-1 downto 0); - stack_start : in std_logic_vector(maxAddrBitIncIO downto 0); interrupt : in std_logic; break : out std_logic; zpu_status : out std_logic_vector(63 downto 0)); @@ -203,7 +202,7 @@ begin if areset = '1' then state <= State_Idle; break <= '0'; - sp <= stack_start(maxAddrBitIncIO downto minAddrBit); + sp <= spStart(maxAddrBitIncIO downto minAddrBit); pc <= (others => '0'); idim_flag <= '0'; diff --git a/usrp2/opencores/zpu/core/zpupkg.vhd b/usrp2/opencores/zpu/core/zpupkg.vhd index eee967a09..1a01563b8 100644 --- a/usrp2/opencores/zpu/core/zpupkg.vhd +++ b/usrp2/opencores/zpu/core/zpupkg.vhd @@ -73,7 +73,6 @@ package zpupkg is mem_write : out std_logic_vector(wordSize-1 downto 0);
out_mem_addr : out std_logic_vector(maxAddrBitIncIO downto 0);
mem_writeMask: out std_logic_vector(wordBytes-1 downto 0);
- stack_start : in std_logic_vector(maxAddrBitIncIO downto 0);
interrupt : in std_logic;
break : out std_logic;
zpu_status : out std_logic_vector(63 downto 0));
|