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ghidra/Ghidra/Processors/8048/data/languages/8048.slaspec
2019-07-19 19:38:56 +02:00

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# sleigh specification file for Intel 8048
# Do not take BS into account when decompiling
@define SINGLE_REGISTER_BANK ""
# Treat R0-R7 as not memory mapped (implies SINGLE_REGISTER_BANK)
@define INTERNAL_REGISTERS ""
@ifdef INTERNAL_REGISTERS
@define SINGLE_REGISTER_BANK ""
@endif
define endian=little;
define alignment=1;
define space CODE type=ram_space size=2 default;
define space INTMEM type=ram_space size=1;
define space EXTMEM type=ram_space size=1;
define space PORT type=ram_space size=1;
define space register type=register_space size=1;
define register offset=0x00 size=1 [ A SP ];
@ifdef INTERNAL_REGISTERS
define register offset=0x10 size=1 [ R0 R1 R2 R3 R4 R5 R6 R7 ];
@endif
define register offset=0x20 size=2 [ PC ];
define register offset=0x30 size=1 [ C AC F0 F1 BS DFB ]; # single bit
################################################################
# Tokens
################################################################
define token opbyte (8)
opfull = (0,7)
oplo = (0,3)
ophi = (4,7)
rn = (0,2) dec
rnfill = (3,3)
ri = (0,0) dec
rifill = (1,3)
opaddr = (5,7)
addrfill = (4,4)
pp = (0,1) dec
xpp = (0,1) dec
ppfill = (2,3)
abit = (5,7) dec
abfill = (4,4)
dfb = (4,4)
bs = (4,4)
;
define token aopword (16)
aoplo = (0,3)
aaddrfill = (4,4)
aopaddr = (5,7)
adata = (8,15)
;
define token ImmedByte (8) data=(0,7);
define token AddrOne (8) addr8=(0,7);
@ifdef INTERNAL_REGISTERS
attach variables rn [ R0 R1 R2 R3 R4 R5 R6 R7 ];
attach variables ri [ R0 R1 ];
@else
attach names rn [ R0 R1 R2 R3 R4 R5 R6 R7 ];
attach names ri [ R0 R1 ];
@endif
attach names dfb [ MB0 MB1 ];
attach names bs [ RB0 RB1 ];
attach names pp [ BUS P1 P2 _ ];
attach names xpp [ P4 P5 P6 P7 ];
################################################################
# Psuedo Instructions
################################################################
define pcodeop nop;
define pcodeop enableExtInt;
define pcodeop enableTCntInt;
define pcodeop enableClockOutput;
define pcodeop disableExtInt;
define pcodeop disableTCntInt;
define pcodeop startTimer;
define pcodeop startEventCounter;
define pcodeop stopTimerAndEventCounter;
define pcodeop setTmr;
define pcodeop getTmr;
define pcodeop getT0;
define pcodeop getT1;
define pcodeop getTF;
define pcodeop getExtInt;
define pcodeop readPort;
define pcodeop writePort;
define pcodeop setBank;
################################################################
# Macros
################################################################
macro getPSW(reg) {
local tmp:1 = 0;
tmp[7,1] = C;
tmp[6,1] = AC;
tmp[5,1] = F0;
tmp[4,1] = BS;
tmp[3,1] = 1;
tmp[0,3] = (SP>>1)&7;
reg = tmp;
}
macro setPSW(reg) {
local tmp:1 = reg;
C = tmp[7,1];
AC = tmp[6,1];
F0 = tmp[5,1];
BS = tmp[4,1];
SP = 2*tmp[0,3] + 8;
}
macro savePSWtoPC(pc) {
pc[15,1] = C;
pc[14,1] = AC;
pc[13,1] = F0;
pc[12,1] = BS;
}
macro restorePSWfromPC(pc) {
C = pc[15,1];
AC = pc[14,1];
F0 = pc[13,1];
BS = pc[12,1];
}
macro push(v) {
*[INTMEM]:2 SP = v;
SP = SP + 2;
}
macro pop(v) {
SP = SP - 2;
v = *[INTMEM]:2 SP;
}
macro popPC(pc) {
pop(pc);
pc = pc & 0xfff;
}
macro popPCandPSW(pc) {
pop(pc);
restorePSWfromPC(pc);
pc = pc & 0xfff;
}
macro funcall(target) {
ret:2 = inst_next;
savePSWtoPC(ret);
push(ret);
call target;
}
macro add(dest, op1, op2, cy_in) {
local result:1 = op1 + op2 + cy_in;
local half_result:1 = (op1 & 0xf) + (op2 & 0xf) + cy_in;
C = carry(op1, op2) || carry(op1+op2, cy_in);
AC = (half_result > 0xf);
dest = result;
}
macro da(reg) {
local tmp:1 = reg;
local low:1 = 6*(AC || (tmp&0xf) > 9);
local cy1:1 = C || carry(tmp, low);
tmp = tmp + low;
local high:1 = 0x60*(cy1 || tmp > 0x99);
C = C || carry(tmp, high);
tmp = tmp + high;
reg = tmp;
}
macro rotc(cy, acc) {
local tmp:1 = cy;
A = acc;
C = tmp;
}
macro xch(node1, node2) {
local tmp:1 = node1;
node1 = node2;
node2 = tmp;
}
@ifdef SINGLE_REGISTER_BANK
macro regbank(r) { }
macro setbank(bs) {
BS = bs;
local tmp:1 = bs;
setBank(tmp);
}
@else
macro regbank(r) {
r = r + BS*0x18;
}
macro setbank(bs) {
BS = bs;
}
@endif
################################################################
Psw: "PSW" is epsilon { }
ExtInt: "I" is epsilon { }
TCntInt: "TCNTI" is epsilon { }
Clk: "CLK" is epsilon { }
Tmr: "T" is epsilon { }
Cnt: "CNT" is epsilon { }
TmrCnt: "TCNT" is epsilon { }
Rn: rn is rn & rnfill=1 {
@ifdef INTERNAL_REGISTERS
export rn;
@else
local ptr:1 = rn; regbank(ptr); export *[INTMEM]:1 ptr;
@endif
}
Rind: @ri is ri & rifill=0 {
@ifdef INTERNAL_REGISTERS
export ri;
@else
local ptr:1 = ri; regbank(ptr); export *[INTMEM]:1 ptr;
@endif
}
Ri: Rind is Rind { export *[INTMEM]:1 Rind; }
RiX: Rind is Rind { export *[EXTMEM]:1 Rind; }
PData: @A is A {
local addr:2 = inst_next; addr[0,7] = A; export *[CODE]:1 addr; }
P3Data: @A is A {
local addr:2 = 0x300; addr[0,7] = A; export *[CODE]:1 addr; }
AddrInd: PData is PData {
local addr:2 = inst_next; addr[0,7] = PData; export *[CODE]:1 addr; }
Ab: abit is abit { local bit:1 = (A>>abit)&1; export bit; }
Data: #data is data { export *[const]:1 data; }
Imm: Data is oplo=3; Data { export Data; }
Addr8: addr is addr8 [ addr = (inst_next $and 0xf00)+addr8; ] {
export *[CODE]:1 addr; }
Addr12: addr is aopaddr & adata [ addr = (DFB*2048)+(aopaddr*256)+adata; ] {
export *[CODE]:1 addr; }
Bus: "BUS" is epsilon { local tmp:1 = 0; export *[PORT]:1 tmp; }
Pp: pp is pp & ppfill=2 { export *[PORT]:1 pp; }
Xpp: xpp is xpp & ppfill=3 { local tmp:1 = xpp+4; export *[PORT]:1 tmp; }
Cc: "C" is ophi=15 { export C; }
Cc: "F0" is ophi=11 { export F0; }
Cc: "F1" is ophi=7 { export F1; }
Cc: "NC" is ophi=14 { tmp:1 = !C; export tmp; }
Cc: "NI" is ophi=8 { tmp:1 = getExtInt(); tmp = !tmp; export tmp; }
Cc: "NT0" is ophi=2 { tmp:1 = getT0(); tmp = !tmp; export tmp; }
Cc: "NT1" is ophi=4 { tmp:1 = getT1(); tmp = !tmp; export tmp; }
Cc: "NZ" is ophi=9 { tmp:1 = A!=0; export tmp; }
Cc: "TF" is ophi=1 { tmp:1 = getTF(); export tmp; }
Cc: "T0" is ophi=3 { tmp:1 = getT0(); export tmp; }
Cc: "T1" is ophi=5 { tmp:1 = getT1(); export tmp; }
Cc: "Z" is ophi=12 { tmp:1 = A==0; export tmp; }
# Conventience tables for opcodes taking both Rn and Ri (and Imm)
Rni: Rn is Rn { export Rn; }
Rni: Ri is Ri { export Ri; }
RniI: Rni is Rni { export Rni; }
RniI: Imm is Imm { export Imm; }
# These are not decoded correctly if placed alphabetically...
:JB^Ab Addr8 is oplo=2 & abfill=1 & Ab; Addr8 { if(Ab) goto Addr8; }
:J^Cc Addr8 is oplo=6 & Cc; Addr8 { if(Cc) goto Addr8; }
:CALL Addr12 is aaddrfill=1 & aoplo=4 & Addr12 { funcall(Addr12); }
:JMP Addr12 is aaddrfill=0 & aoplo=4 & Addr12 { goto Addr12; }
:DJNZ Rn,Addr8 is ophi=14 & Rn; Addr8 { Rn = Rn - 1; if(Rn != 0) goto Addr8; }
:ADD A,Rni is ophi=6 & A & Rni { add(A,A,Rni,0); }
:ADD A,Imm is (ophi=0 & A)... & Imm { add(A,A,Imm,0); }
:ADDC A,Rni is ophi=7 & A & Rni { add(A,A,Rni,C); }
:ADDC A,Imm is (ophi=1 & A)... & Imm { add(A,A,Imm,C); }
:ANL A,RniI is (ophi=5 & A)... & RniI { A = A & RniI; }
:ANL Pp,Data is ophi=9 & Pp; Data { Pp = Pp & Data; }
:ANLD Xpp,A is ophi=9 & Xpp & A { Xpp = Xpp & (A & 0xf); }
:CLR A is ophi=2 & oplo=7 & A { A = 0; }
:CLR C is ophi=9 & oplo=7 & C { C = 0; }
:CLR F0 is ophi=8 & oplo=5 & F0 { F0 = 0; }
:CLR F1 is ophi=10 & oplo=5 & F1 { F1 = 0; }
:CPL A is ophi=3 & oplo=7 & A { A = ~A; }
:CPL C is ophi=10 & oplo=7 & C { C = !C; }
:CPL F0 is ophi=9 & oplo=5 & F0 { F0 = !F0; }
:CPL F1 is ophi=11 & oplo=5 & F1 { F1 = !F1; }
:DA A is ophi=5 & oplo=7 & A { da(A); }
:DEC A is ophi=0 & oplo=7 & A { A = A - 1; }
:DEC Rn is ophi=12 & Rn { Rn = Rn - 1; }
:DIS ExtInt is ophi=1 & oplo=5 & ExtInt { disableExtInt(); }
:DIS TCntInt is ophi=3 & oplo=5 & TCntInt { disableTCntInt(); }
:EN ExtInt is ophi=0 & oplo=5 & ExtInt { enableExtInt(); }
:EN TCntInt is ophi=2 & oplo=5 & TCntInt { enableTCntInt(); }
:ENT0 Clk is ophi=7 & oplo=5 & Clk { enableClockOutput(); }
:IN A,Pp is ophi=0 & pp!=0 & A & Pp { A = Pp; }
:INC A is ophi=1 & oplo=7 & A { A = A + 1; }
:INC Rni is ophi=1 & Rni { Rni = Rni + 1; }
:INS A,Bus is ophi=0 & oplo=8 & A & Bus { A = Bus; }
:JMPP AddrInd is ophi=11 & oplo=3 & AddrInd { goto AddrInd; }
:MOV A,Imm is (ophi=2 & A)... & Imm { A = Imm; }
:MOV A,Psw is ophi=12 & oplo=7 & A & Psw { getPSW(A); }
:MOV A,Rni is ophi=15 & A & Rni { A = Rni; }
:MOV A,Tmr is ophi=4 & oplo=2 & A & Tmr { A = getTmr(); }
:MOV Psw,A is ophi=13 & oplo=7 & Psw & A { setPSW(A); }
:MOV Rni,A is ophi=10 & Rni & A { Rni = A; }
:MOV Rni,Data is ophi=11 & Rni; Data { Rni = Data; }
:MOV Tmr,A is ophi=6 & oplo=2 & Tmr & A { setTmr(A); }
:MOVD A,Xpp is ophi=0 & Xpp & A { A = (Xpp & 0xf); }
:MOVD Xpp,A is ophi=3 & Xpp & A { Xpp = (A & 0xf); }
:MOVP A,PData is ophi=10 & oplo=3 & A & PData { A = PData; }
:MOVP3 A,P3Data is ophi=14 & oplo=3 & A & P3Data { A = P3Data; }
:MOVX A,RiX is ophi=8 & A & RiX { A = RiX; }
:MOVX RiX,A is ophi=9 & RiX & A { RiX = A; }
:NOP is ophi=0 & oplo=0 { nop(); }
:ORL A,RniI is (ophi=4 & A)... & RniI { A = A | RniI; }
:ORL Pp,Data is ophi=8 & Pp; Data { Pp = Pp | Data; }
:ORLD Xpp,A is ophi=8 & Xpp & A { Xpp = Xpp | (A & 0xf); }
:OUTL Bus,A is ophi=0 & oplo=2 & Bus & A { Bus = A; }
:OUTL Pp,A is ophi=3 & pp!=0 & Pp & A { Pp = A; }
:RET is ophi=8 & oplo=3 { pc:2 = 0; popPC(pc); return[pc]; }
:RETR is ophi=9 & oplo=3 { pc:2 = 0; popPCandPSW(pc); return[pc]; }
:RL A is ophi=14 & oplo=7 & A { A = (A<<1) | (A>>7); }
:RLC A is ophi=15 & oplo=7 & A { rotc((A&0x80)>>7, (A<<1)|C); }
:RR A is ophi=7 & oplo=7 & A { A = (A>>1) | (A<<7); }
:RRC A is ophi=6 & oplo=7 & A { rotc(A&1, (A>>1)|(C<<7)); }
:SEL dfb is (ophi=14 | ophi=15) & oplo=5 & dfb { DFB = dfb; }
:SEL bs is (ophi=12 | ophi=13) & oplo=5 & bs { setbank(bs); }
:STOP TmrCnt is ophi=6 & oplo=5 & TmrCnt { stopTimerAndEventCounter(); }
:STRT Cnt is ophi=4 & oplo=5 & Cnt { startEventCounter(); }
:STRT Tmr is ophi=5 & oplo=5 & Tmr { startTimer(); }
:SWAP A is ophi=4 & oplo=7 & A { A = (A<<4)|(A>>4); }
:XCH A,Rni is ophi=2 & A & Rni { xch(A, Rni); }
:XCHD A,Ri is ophi=3 & A & Ri { xch(A[0,4], Ri[0,4]); }
:XRL A,RniI is (ophi=13 & A)... & RniI { A = A ^ RniI; }