bootromfun: stuff zum debuggen fuern stefan :/

nach dem "ret" wird im modelsim alles rot (pc = 0x1A).
ACHTUNG: das mit dem was ich uebern branch am telefon grad gesagt hab, war a
bloedsinn. es handelt sich eh um das "ret", sry :/ duerfte sich eh um das selbe
problem wie in der mail erwaehnt handeln!

bissl naeher analysiert: instr_r_addr_nxt wird XXXXX. verursacht durch
jump_result, welches von der writeback kommt. in zeile 230 wird data_ram_read
zugewiesen, welches laut modelsim UUUUU ist.

btw: eigentlich wollten wir nur mal die UART simulieren... :D

diff --git a/2_isa/src/bootrom.s b/2_isa/src/bootrom.s
index 2a46cfdabb8a38f695b8c955cbfce4607153b502..18bc1ca4dc54cfb2cbc2cbcd35611d31207e9bd7 100644 (file)
--- a/2_isa/src/bootrom.s
+++ b/2_isa/src/bootrom.s
@@ -24,17 +24,17 @@ main:
        ldih r10, UART_BASE@hi
        ldi r11, PBASE@lo
        ldih r11, PBASE@hi
-poll:
-       ldw r3, UART_STATUS(r10)
-       andx r3, UART_RECV_NEW
-       brzs+ poll; branch if zero
+;poll:
+;      ldw r3, UART_STATUS(r10)
+;      andx r3, UART_RECV_NEW
+;      brzs+ poll; branch if zero
 
        call recv_byte
        ; we received the enter bootrom sign
-       xor r1, r1, r1
        cmpi r0, 0x48 ; 'H'
+       xor r1, r1, r1 ; TODO: wieder raufziehen
        breq- bt_H
-       br poll ; else
+       ; br poll ; else
 
 ;-----
 send_byte:
@@ -58,11 +58,11 @@ send_word:
 
 ;-----
 recv_byte:
-       ldw r3, UART_STATUS(r10)
-       andx r3, UART_RECV_NEW
-       brzs+ recv_byte; branch if zero
+;      ldw r3, UART_STATUS(r10)
+;      andx r3, UART_RECV_NEW
+;      brzs+ recv_byte; branch if zero
        xor r0, r0, r0
-       ldb r0, UART_RECV(r10)
+;      ldb r0, UART_RECV(r10)
        ret
 
 ;-----

diff --git a/cpu/src/rom_b.vhd b/cpu/src/rom_b.vhd
index 36b344598d8bf9a99476f0a6dca2d6b0ddf2a62b..85ea70150fdd93443513173f589907ec2b5ff53b 100644 (file)
--- a/cpu/src/rom_b.vhd
+++ b/cpu/src/rom_b.vhd
@@ -130,95 +130,87 @@ begin
        when "0000100" => data_out <= x"ed500002"; -- ldih r10, UART_BASE@hi
        when "0000101" => data_out <= x"ed590180"; -- ldi r11, PBASE@lo
        when "0000110" => data_out <= x"ed580002"; -- ldih r11, PBASE@hi
-       when "0000111" => data_out <= x"e71d0000"; -- ldw r3, UART_STATUS(r10)
-       when "0001000" => data_out <= x"e2980010"; -- andx r3, UART_RECV_NEW
-       when "0001001" => data_out <= x"1b7fff03"; -- brzs+ poll
-       when "0001010" => data_out <= x"eb000985"; -- call recv_byte
-       when "0001011" => data_out <= x"e4088800"; -- xor r1, r1, r1
-       when "0001100" => data_out <= x"ec800240"; -- cmpi r0, 0x48 
-       when "0001101" => data_out <= x"1b001881"; -- breq- bt_H
-       when "0001110" => data_out <= x"eb7ffc81"; -- br poll 
-       when "0001111" => data_out <= x"e71d0000"; -- ldw r3, UART_STATUS(r10)
-       when "0010000" => data_out <= x"e2980008"; -- andx r3, UART_TRANS_EMPTY
-       when "0010001" => data_out <= x"0b7fff03"; -- brnz+ send_byte 
-       when "0010010" => data_out <= x"e98d0008"; -- stb r1, UART_TRANS(r10)
-       when "0010011" => data_out <= x"eb000008"; -- ret
-       when "0010100" => data_out <= x"e5008008"; -- lrs r0, r1, 0
-       when "0010101" => data_out <= x"eb7ffd05"; -- call send_byte
-       when "0010110" => data_out <= x"e500a008"; -- lrs r0, r1, 8
-       when "0010111" => data_out <= x"eb7ffc05"; -- call send_byte
-       when "0011000" => data_out <= x"e500c008"; -- lrs r0, r1, 16
-       when "0011001" => data_out <= x"eb7ffb05"; -- call send_byte
-       when "0011010" => data_out <= x"e500e008"; -- lrs r0, r1, 24
-       when "0011011" => data_out <= x"eb7ffa05"; -- call send_byte
-       when "0011100" => data_out <= x"eb000008"; -- ret
-       when "0011101" => data_out <= x"e71d0000"; -- ldw r3, UART_STATUS(r10)
-       when "0011110" => data_out <= x"e2980010"; -- andx r3, UART_RECV_NEW
-       when "0011111" => data_out <= x"1b7fff03"; -- brzs+ recv_byte
-       when "0100000" => data_out <= x"e4000000"; -- xor r0, r0, r0
-       when "0100001" => data_out <= x"e905000c"; -- ldb r0, UART_RECV(r10)
-       when "0100010" => data_out <= x"eb000008"; -- ret
-       when "0100011" => data_out <= x"e4088800"; -- xor r1, r1, r1
-       when "0100100" => data_out <= x"eb7ffc85"; -- call recv_byte
-       when "0100101" => data_out <= x"e3080800"; -- or r1, r0, r1
-       when "0100110" => data_out <= x"eb7ffb85"; -- call recv_byte
-       when "0100111" => data_out <= x"e508a000"; -- lls r1, r1, 8
-       when "0101000" => data_out <= x"e3080800"; -- or r1, r0, r1
-       when "0101001" => data_out <= x"eb7ffa05"; -- call recv_byte
-       when "0101010" => data_out <= x"e508a000"; -- lls r1, r1, 8
-       when "0101011" => data_out <= x"e3080800"; -- or r1, r0, r1
-       when "0101100" => data_out <= x"eb7ff885"; -- call recv_byte
-       when "0101101" => data_out <= x"e508a000"; -- lls r1, r1, 8
-       when "0101110" => data_out <= x"e3080800"; -- or r1, r0, r1
-       when "0101111" => data_out <= x"e1008000"; -- addi r0, r1, 0
-       when "0110000" => data_out <= x"eb000008"; -- ret
-       when "0110001" => data_out <= x"eb7ff605"; -- call recv_byte
-       when "0110010" => data_out <= x"eb001701"; -- br tehend
-       when "0110011" => data_out <= x"e4088800"; -- xor r1, r1, r1
-       when "0110100" => data_out <= x"ec8002b8"; -- cmpi r0, 0x57 
-       when "0110101" => data_out <= x"1b000681"; -- breq- bt_W
-       when "0110110" => data_out <= x"ec800290"; -- cmpi r0, 0x52 
-       when "0110111" => data_out <= x"1b000901"; -- breq- bt_R
-       when "0111000" => data_out <= x"ec800288"; -- cmpi r0, 0x51 
-       when "0111001" => data_out <= x"1b000b81"; -- breq- bt_Q
-       when "0111010" => data_out <= x"ec8002a0"; -- cmpi r0, 0x54 
-       when "0111011" => data_out <= x"1b000e01"; -- breq- bt_T
-       when "0111100" => data_out <= x"ec800250"; -- cmpi r0, 0x4a 
-       when "0111101" => data_out <= x"1b001081"; -- breq- bt_J
-       when "0111110" => data_out <= x"ed080278"; -- ldi r1, 0x4f 
-       when "0111111" => data_out <= x"eb7fe805"; -- call send_byte
-       when "1000000" => data_out <= x"eb7fe785"; -- call send_byte
-       when "1000001" => data_out <= x"eb7ff801"; -- br bootrom
-       when "1000010" => data_out <= x"eb7ff085"; -- call recv_word 
-       when "1000011" => data_out <= x"e7858004"; -- stw r0, PADDR(r11)
-       when "1000100" => data_out <= x"eb7fef85"; -- call recv_word 
-       when "1000101" => data_out <= x"e7858008"; -- stw r0, PDATA(r11)
-       when "1000110" => data_out <= x"ed080220"; -- ldi r1, 0x44 
-       when "1000111" => data_out <= x"eb7fe405"; -- call send_byte
-       when "1001000" => data_out <= x"eb7ff481"; -- br bootrom
-       when "1001001" => data_out <= x"eb7fed05"; -- call recv_word 
-       when "1001010" => data_out <= x"e1100000"; -- mov r2, r0
-       when "1001011" => data_out <= x"ed080230"; -- ldi r1, 0x46 
-       when "1001100" => data_out <= x"eb7fe185"; -- call send_byte
-       when "1001101" => data_out <= x"ea090000"; -- ldx r1, 0(r2)
-       when "1001110" => data_out <= x"eb7fe305"; -- call send_word
-       when "1001111" => data_out <= x"eb7ff101"; -- br bootrom
-       when "1010000" => data_out <= x"eb7fe985"; -- call recv_word 
-       when "1010001" => data_out <= x"e1300000"; -- mov r6, r0
-       when "1010010" => data_out <= x"eb7fe885"; -- call recv_word 
-       when "1010011" => data_out <= x"e7830000"; -- stw r0, 0(r6)
-       when "1010100" => data_out <= x"ed080208"; -- ldi r1, 0x41 
-       when "1010101" => data_out <= x"eb7fdd05"; -- call send_byte
-       when "1010110" => data_out <= x"eb7fed81"; -- br bootrom
-       when "1010111" => data_out <= x"eb7fe605"; -- call recv_word 
-       when "1011000" => data_out <= x"e1100000"; -- mov r2, r0
-       when "1011001" => data_out <= x"ed080238"; -- ldi r1, 0x47 
-       when "1011010" => data_out <= x"eb7fda85"; -- call send_byte
-       when "1011011" => data_out <= x"e7090000"; -- ldw r1, 0(r2)
-       when "1011100" => data_out <= x"eb7fdc05"; -- call send_word
-       when "1011101" => data_out <= x"eb7fea01"; -- br bootrom
-       when "1011110" => data_out <= x"eb7fe285"; -- call recv_word
-       when "1011111" => data_out <= x"eb800000"; -- brr r0
+       when "0000111" => data_out <= x"eb000905"; -- call recv_byte
+       when "0001000" => data_out <= x"ec800240"; -- cmpi r0, 0x48 
+       when "0001001" => data_out <= x"e4088800"; -- xor r1, r1, r1 
+       when "0001010" => data_out <= x"1b001603"; -- breq+ bt_H
+       when "0001011" => data_out <= x"e71d0000"; -- ldw r3, UART_STATUS(r10)
+       when "0001100" => data_out <= x"e2980008"; -- andx r3, UART_TRANS_EMPTY
+       when "0001101" => data_out <= x"0b7fff03"; -- brnz+ send_byte 
+       when "0001110" => data_out <= x"e98d0008"; -- stb r1, UART_TRANS(r10)
+       when "0001111" => data_out <= x"eb000008"; -- ret
+       when "0010000" => data_out <= x"e5008008"; -- lrs r0, r1, 0
+       when "0010001" => data_out <= x"eb7ffd05"; -- call send_byte
+       when "0010010" => data_out <= x"e500a008"; -- lrs r0, r1, 8
+       when "0010011" => data_out <= x"eb7ffc05"; -- call send_byte
+       when "0010100" => data_out <= x"e500c008"; -- lrs r0, r1, 16
+       when "0010101" => data_out <= x"eb7ffb05"; -- call send_byte
+       when "0010110" => data_out <= x"e500e008"; -- lrs r0, r1, 24
+       when "0010111" => data_out <= x"eb7ffa05"; -- call send_byte
+       when "0011000" => data_out <= x"eb000008"; -- ret
+       when "0011001" => data_out <= x"e4000000"; -- xor r0, r0, r0
+       when "0011010" => data_out <= x"eb000008"; -- ret
+       when "0011011" => data_out <= x"e4088800"; -- xor r1, r1, r1
+       when "0011100" => data_out <= x"eb7ffe85"; -- call recv_byte
+       when "0011101" => data_out <= x"e3080800"; -- or r1, r0, r1
+       when "0011110" => data_out <= x"eb7ffd85"; -- call recv_byte
+       when "0011111" => data_out <= x"e508a000"; -- lls r1, r1, 8
+       when "0100000" => data_out <= x"e3080800"; -- or r1, r0, r1
+       when "0100001" => data_out <= x"eb7ffc05"; -- call recv_byte
+       when "0100010" => data_out <= x"e508a000"; -- lls r1, r1, 8
+       when "0100011" => data_out <= x"e3080800"; -- or r1, r0, r1
+       when "0100100" => data_out <= x"eb7ffa85"; -- call recv_byte
+       when "0100101" => data_out <= x"e508a000"; -- lls r1, r1, 8
+       when "0100110" => data_out <= x"e3080800"; -- or r1, r0, r1
+       when "0100111" => data_out <= x"e1008000"; -- addi r0, r1, 0
+       when "0101000" => data_out <= x"eb000008"; -- ret
+       when "0101001" => data_out <= x"eb7ff805"; -- call recv_byte
+       when "0101010" => data_out <= x"eb001701"; -- br tehend
+       when "0101011" => data_out <= x"e4088800"; -- xor r1, r1, r1
+       when "0101100" => data_out <= x"ec8002b8"; -- cmpi r0, 0x57 
+       when "0101101" => data_out <= x"1b000681"; -- breq- bt_W
+       when "0101110" => data_out <= x"ec800290"; -- cmpi r0, 0x52 
+       when "0101111" => data_out <= x"1b000901"; -- breq- bt_R
+       when "0110000" => data_out <= x"ec800288"; -- cmpi r0, 0x51 
+       when "0110001" => data_out <= x"1b000b81"; -- breq- bt_Q
+       when "0110010" => data_out <= x"ec8002a0"; -- cmpi r0, 0x54 
+       when "0110011" => data_out <= x"1b000e01"; -- breq- bt_T
+       when "0110100" => data_out <= x"ec800250"; -- cmpi r0, 0x4a 
+       when "0110101" => data_out <= x"1b001081"; -- breq- bt_J
+       when "0110110" => data_out <= x"ed080278"; -- ldi r1, 0x4f 
+       when "0110111" => data_out <= x"eb7fea05"; -- call send_byte
+       when "0111000" => data_out <= x"eb7fe985"; -- call send_byte
+       when "0111001" => data_out <= x"eb7ff801"; -- br bootrom
+       when "0111010" => data_out <= x"eb7ff085"; -- call recv_word 
+       when "0111011" => data_out <= x"e7858004"; -- stw r0, PADDR(r11)
+       when "0111100" => data_out <= x"eb7fef85"; -- call recv_word 
+       when "0111101" => data_out <= x"e7858008"; -- stw r0, PDATA(r11)
+       when "0111110" => data_out <= x"ed080220"; -- ldi r1, 0x44 
+       when "0111111" => data_out <= x"eb7fe605"; -- call send_byte
+       when "1000000" => data_out <= x"eb7ff481"; -- br bootrom
+       when "1000001" => data_out <= x"eb7fed05"; -- call recv_word 
+       when "1000010" => data_out <= x"e1100000"; -- mov r2, r0
+       when "1000011" => data_out <= x"ed080230"; -- ldi r1, 0x46 
+       when "1000100" => data_out <= x"eb7fe385"; -- call send_byte
+       when "1000101" => data_out <= x"ea090000"; -- ldx r1, 0(r2)
+       when "1000110" => data_out <= x"eb7fe505"; -- call send_word
+       when "1000111" => data_out <= x"eb7ff101"; -- br bootrom
+       when "1001000" => data_out <= x"eb7fe985"; -- call recv_word 
+       when "1001001" => data_out <= x"e1300000"; -- mov r6, r0
+       when "1001010" => data_out <= x"eb7fe885"; -- call recv_word 
+       when "1001011" => data_out <= x"e7830000"; -- stw r0, 0(r6)
+       when "1001100" => data_out <= x"ed080208"; -- ldi r1, 0x41 
+       when "1001101" => data_out <= x"eb7fdf05"; -- call send_byte
+       when "1001110" => data_out <= x"eb7fed81"; -- br bootrom
+       when "1001111" => data_out <= x"eb7fe605"; -- call recv_word 
+       when "1010000" => data_out <= x"e1100000"; -- mov r2, r0
+       when "1010001" => data_out <= x"ed080238"; -- ldi r1, 0x47 
+       when "1010010" => data_out <= x"eb7fdc85"; -- call send_byte
+       when "1010011" => data_out <= x"e7090000"; -- ldw r1, 0(r2)
+       when "1010100" => data_out <= x"eb7fde05"; -- call send_word
+       when "1010101" => data_out <= x"eb7fea01"; -- br bootrom
+       when "1010110" => data_out <= x"eb7fe285"; -- call recv_word
+       when "1010111" => data_out <= x"eb800000"; -- brr r0
        -- just nop until rom end!
        when others => data_out <= x"fd000000";
                        end case;