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ex1: Add SPR_TBU support

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It's used by the boot wrapper in Linux and possibly some userspace
programs.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Benjamin Herrenschmidt
2020-06-18 19:41:00 +10:00
parent 8366710217
commit 76e2c7d81c
2 changed files with 4 additions and 0 deletions
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1
common.vhdl
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@@ -27,6 +27,7 @@ package common is
constant SPR_DSISR : spr_num_t := 18;
constant SPR_DAR : spr_num_t := 19;
constant SPR_TB : spr_num_t := 268;
constant SPR_TBU : spr_num_t := 269;
constant SPR_DEC : spr_num_t := 22;
constant SPR_SRR0 : spr_num_t := 26;
constant SPR_SRR1 : spr_num_t := 27;

3
execute1.vhdl
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@@ -752,6 +752,9 @@ begin
case decode_spr_num(e_in.insn) is
when SPR_TB =>
spr_val := ctrl.tb;
when SPR_TBU =>
spr_val(63 downto 32) := (others => '0');
spr_val(31 downto 0) := ctrl.tb(63 downto 32);
when SPR_DEC =>
spr_val := ctrl.dec;
when 724 => -- LOG_ADDR SPR