mirror of
https://github.com/hoglet67/AtomBusMon.git
synced 2025-02-07 02:30:53 +00:00
Added read and write breakpoints
Change-Id: Id528aed8058ad52d4d39cb9543dfc78d22dfd05d
This commit is contained in:
David Banks
parent
10afdff12c
commit
85fd68e43b
@ -20,6 +20,23 @@
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#define BRKPT_INTERRUPTED_MASK 0x40
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#define BRKPT_ACTIVE_MASK 0x80
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// Breakpoint Modes
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#define BRKPT_INSTR 0x01
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#define BRKPT_READ 0x02
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#define BRKPT_WRITE 0x04
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char *brkptStrings[8] = {
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"No breakpoint",
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"Instruction breakpoint",
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"Read breakpoint",
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"Instruction, read breakpoints",
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"Write breakpoint",
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"Instruction, write breakpoints",
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"Read, write breakpoints",
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"Instruction, read, write breakpoints"
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};
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#define CTRL_MASK (SINGLE_MASK | STEP_MASK | RESET_MASK | BRKPT_ENABLE_MASK | BRKPT_CLOCK_MASK | BRKPT_DATA_MASK)
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#define AL_PORT PORTD
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@ -34,7 +51,7 @@
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#define VERSION "0.11"
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#define NUMCMDS 10
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#define NUMCMDS 12
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#define MAXBKPTS 4
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int numbkpts = 0;
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@ -50,6 +67,14 @@ unsigned int breakpoints[MAXBKPTS] = {
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0
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};
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unsigned int modes[MAXBKPTS] = {
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0,
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0,
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0,
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0
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};
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char *cmdStrings[NUMCMDS] = {
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"help",
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"reset",
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@ -58,7 +83,9 @@ char *cmdStrings[NUMCMDS] = {
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"step",
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"trace",
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"blist",
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"break",
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"breaki",
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"breakr",
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"breakw",
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"bclear",
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"continue",
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};
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@ -135,6 +162,7 @@ void version() {
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log0("Compiled at %s on %s\n",__TIME__,__DATE__);
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}
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/*******************************************
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* Commands
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*******************************************/
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@ -211,43 +239,64 @@ void doCmdBList(char *params) {
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int i;
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if (numbkpts) {
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for (i = 0; i < numbkpts; i++) {
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log0("%d: %04X\n", i, breakpoints[i]);
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log0("%d: %04X %s\n", i, breakpoints[i], brkptStrings[modes[i]]);
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}
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} else {
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log0("No breakpoints set\n");
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}
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}
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void doCmdBreak(char *params) {
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void setBreakpoint(int i, int addr, int mode) {
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log0("%s set at %04X\n", brkptStrings[mode], addr);
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breakpoints[i] = addr;
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modes[i] = mode;
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}
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void doCmdBreak(char *params, unsigned int mode) {
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int i;
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unsigned int addr;
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sscanf(params, "%x", &addr);
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for (i = 0; i < numbkpts; i++) {
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if (breakpoints[i] == addr) {
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if (modes[i] & mode) {
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log0("%s already set at %04X\n", brkptStrings[mode], addr);
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} else {
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setBreakpoint(i, addr, modes[i] | mode);
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}
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doCmdBList(NULL);
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return;
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}
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}
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if (numbkpts == MAXBKPTS) {
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log0("All breakpoints are already set\n");
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doCmdBList(NULL);
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return;
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}
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for (i = 0; i < numbkpts; i++) {
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if (breakpoints[i] == addr) {
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log0("Breakpoint already set at %04X\n", addr);
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doCmdBList(NULL);
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return;
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}
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}
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numbkpts++;
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for (i = numbkpts - 2; i >= -1; i--) {
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if (i == -1 || breakpoints[i] < addr) {
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log0("Setting breakpoint at %04X\n", addr);
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breakpoints[i + 1] = addr;
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setBreakpoint(i + 1, addr, mode);
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doCmdBList(NULL);
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return;
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} else {
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breakpoints[i + 1] = breakpoints[i];
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modes[i + 1] = modes[i];
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}
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}
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}
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void doCmdBreakI(char *params) {
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doCmdBreak(params, BRKPT_INSTR);
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}
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void doCmdBreakR(char *params) {
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doCmdBreak(params, BRKPT_READ);
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}
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void doCmdBreakW(char *params) {
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doCmdBreak(params, BRKPT_WRITE);
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}
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void doCmdBClear(char *params) {
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int i;
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int n = 0;
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@ -255,20 +304,24 @@ void doCmdBClear(char *params) {
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if (n >= numbkpts) {
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log0("Breakpoint %d not set\n", n);
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} else {
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log0("Removing breakpoint at %04X\n", breakpoints[n]);
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log0("Removing %s at %04X\n", brkptStrings[modes[n], breakpoints[n]);
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for (i = n; i < numbkpts; i++) {
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breakpoints[i] = breakpoints[i + 1];
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modes[i] = modes[i + 1];
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}
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numbkpts--;
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}
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doCmdBList(NULL);
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}
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void shiftBreakpointRegister(unsigned int addr) {
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void shiftBreakpointRegister(unsigned int addr, unsigned int mode) {
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int i;
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for (i = 0; i < 16; i++) {
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long reg = mode;
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reg <<= 16;
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reg |= addr;
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for (i = 0; i < 20; i++) {
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CTRL_PORT &= ~BRKPT_CLOCK_MASK;
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if (addr & 1) {
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if (reg & 1) {
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CTRL_PORT |= BRKPT_DATA_MASK;
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} else {
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CTRL_PORT &= ~BRKPT_DATA_MASK;
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@ -276,7 +329,7 @@ void shiftBreakpointRegister(unsigned int addr) {
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Delay_us(10);
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CTRL_PORT |= BRKPT_CLOCK_MASK;
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Delay_us(10);
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addr >>= 1;
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reg >>= 1;
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}
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}
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@ -289,8 +342,11 @@ void doCmdContinue(char *params) {
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CTRL_PORT &= ~BRKPT_ENABLE_MASK;
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// Load breakpoints into comparators
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for (i = 0; i < MAXBKPTS; i++) {
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shiftBreakpointRegister(i < numbkpts ? breakpoints[i] : 0);
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for (i = 0; i < numbkpts; i++) {
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shiftBreakpointRegister(breakpoints[i], modes[i]);
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}
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for (i = numbkpts; i < MAXBKPTS; i++) {
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shiftBreakpointRegister(0, 0);
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}
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// Enable breakpoints
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@ -344,7 +400,9 @@ void (*cmdFuncs[NUMCMDS])(char *params) = {
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doCmdStep,
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doCmdTrace,
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doCmdBList,
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doCmdBreak,
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doCmdBreakI,
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doCmdBreakR,
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doCmdBreakW,
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doCmdBClear,
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doCmdContinue
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};
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@ -86,11 +86,7 @@ architecture behavioral of AtomBusMon is
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signal brkpt_active : std_logic;
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signal brkpt_active1 : std_logic;
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signal brkpt_0 : std_logic_vector(15 downto 0);
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signal brkpt_1 : std_logic_vector(15 downto 0);
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signal brkpt_2 : std_logic_vector(15 downto 0);
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signal brkpt_3 : std_logic_vector(15 downto 0);
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signal brkpt_reg : std_logic_vector(63 downto 0);
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signal brkpt_reg : std_logic_vector(79 downto 0);
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begin
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@ -186,15 +182,43 @@ begin
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dy_data(1) <= hex & "0000" & Addr(7 downto 4);
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dy_data(2) <= hex & "0000" & "00" & (not nsw2) & sw1;
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brkpt_0 <= brkpt_reg(15 downto 0);
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brkpt_1 <= brkpt_reg(31 downto 16);
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brkpt_2 <= brkpt_reg(47 downto 32);
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brkpt_3 <= brkpt_reg(63 downto 48);
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brkpt_active <= '1' when brkpt_enable = '1' and Sync = '1' and
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((Addr = brkpt_0) or (Addr = brkpt_1) or (Addr = brkpt_2) or (Addr = brkpt_3))
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else '0';
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brkpr_active: process (brkpt_reg, brkpt_enable, Addr, Sync)
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variable tmp : std_logic;
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variable i : integer;
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variable brkpt_addr : std_logic_vector(15 downto 0);
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variable brkpt_mode_i : std_logic;
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variable brkpt_mode_ar : std_logic;
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variable brkpt_mode_aw : std_logic;
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begin
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tmp := '0';
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if (brkpt_enable = '1') then
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for i in 0 to 3 loop
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brkpt_addr := brkpt_reg(i * 20 + 15 downto i * 20);
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brkpt_mode_i := brkpt_reg(i * 20 + 16);
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brkpt_mode_ar := brkpt_reg(i * 20 + 17);
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brkpt_mode_aw := brkpt_reg(i * 20 + 18);
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if (Addr = brkpt_addr) then
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if (Sync = '1') then
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if (brkpt_mode_i = '1') then
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tmp := '1';
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end if;
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else
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if (RNW = '1') then
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if (brkpt_mode_ar = '1') then
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tmp := '1';
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end if;
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else
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if (brkpt_mode_aw = '1') then
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tmp := '1';
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end if;
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end if;
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end if;
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end if;
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end loop;
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end if;
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brkpt_active <= tmp;
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end process;
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-- 6502 Control
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syncProcess: process (Phi2)
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@ -215,7 +239,7 @@ begin
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brkpt_clock1 <= brkpt_clock;
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brkpt_clock2 <= brkpt_clock1;
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if (brkpt_enable = '0' and brkpt_clock2 = '0' and brkpt_clock1 = '1') then
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brkpt_reg <= brkpt_data & brkpt_reg(63 downto 1);
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brkpt_reg <= brkpt_data & brkpt_reg(brkpt_reg'length - 1 downto 1);
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end if;
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brkpt_active1 <= brkpt_active;
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-- Single Stepping
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