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Remove sim_config instruction

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It's not used any more, and it's not in the ISA.

Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
This commit is contained in:
Paul Mackerras
2020-04-06 13:07:00 +10:00
parent f5f17c24fd
commit 278ac5e0eb
3 changed files with 1 additions and 10 deletions
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4
decode1.vhdl
View File

@@ -345,7 +345,6 @@ architecture behaviour of decode1 is
constant attn_instr : decode_rom_t := (ALU, OP_ATTN, NONE, NONE, NONE, NONE, '0', '0', '0', '0', ZERO, '0', NONE, '0', '0', '0', '0', '0', '0', NONE, '0', '1');
constant nop_instr : decode_rom_t := (ALU, OP_NOP, NONE, NONE, NONE, NONE, '0', '0', '0', '0', ZERO, '0', NONE, '0', '0', '0', '0', '0', '0', NONE, '0', '0');
constant sc_instr : decode_rom_t := (ALU, OP_SC, NONE, NONE, NONE, NONE, '0', '0', '0', '0', ZERO, '0', NONE, '0', '0', '0', '0', '0', '0', NONE, '0', '0');
constant sim_cfg_instr : decode_rom_t := (ALU, OP_SIM_CONFIG,NONE, NONE, NONE, RT, '0', '0', '0', '0', ZERO, '0', NONE, '0', '0', '0', '0', '0', '0', NONE, '0', '1');
begin
decode1_0: process(clk)
@@ -406,9 +405,6 @@ begin
elsif std_match(f_in.insn, "010001--------------0000000---1-") then
report "PPC_sc";
v.decode := sc_instr;
elsif std_match(f_in.insn, "000001---------------0000000011-") then
report "PPC_SIM_CONFIG";
v.decode := sim_cfg_instr;
elsif std_match(f_in.insn, "000000---------------0100000000-") then
report "PPC_attn";
v.decode := attn_instr;

2
decode_types.vhdl
View File

@@ -17,7 +17,7 @@ package decode_types is
OP_RLC, OP_RLCL, OP_RLCR, OP_SC, OP_SETB,
OP_SHL, OP_SHR,
OP_SYNC, OP_TRAP,
OP_XOR, OP_SIM_CONFIG
OP_XOR
);
type input_reg_a_t is (NONE, RA, RA_OR_ZERO, SPR);
type input_reg_b_t is (NONE, RB, CONST_UI, CONST_SI, CONST_SI_HI, CONST_UI_HI, CONST_LI, CONST_BD, CONST_DS, CONST_M1, CONST_SH, CONST_SH32, SPR);

5
execute1.vhdl
View File

@@ -743,11 +743,6 @@ begin
set_carry(v.e, rotator_carry, rotator_carry);
end if;
result_en := '1';
when OP_SIM_CONFIG =>
-- bit 0 was used to select the microwatt console, which
-- we no longer support.
result := x"0000000000000000";
result_en := '1';
when OP_ISYNC =>
f_out.redirect <= '1';