X-Git-Url: https://git.libre-soc.org/?a=blobdiff_plain;f=riscv%2Fdebug_module.cc;h=d828b72ff1a7da53df762143a53871c7f1d23695;hb=4f8b6a69484bd901f213d9a73ea29d26c8022dfd;hp=533b959b9d3cf487b70910189f60482229185acc;hpb=51a8a43d747c8e182dbcb63f602c6e27df30c276;p=riscv-isa-sim.git

diff --git a/riscv/debug_module.cc b/riscv/debug_module.cc
index 533b959..d828b72 100644
--- a/riscv/debug_module.cc
+++ b/riscv/debug_module.cc
@@ -39,7 +39,7 @@ debug_module_t::debug_module_t(sim_t *sim) : sim(sim)
           jal(ZERO, debug_abstract_start - DEBUG_ROM_WHERETO));
 
   memset(debug_abstract, 0, sizeof(debug_abstract));
- 
+
 }
 
 void debug_module_t::reset()
@@ -96,7 +96,7 @@ bool debug_module_t::load(reg_t addr, size_t len, uint8_t* bytes)
     memcpy(bytes, dmdata + addr - debug_data_start, len);
     return true;
   }
-  
+
   if (addr >= debug_progbuf_start && ((addr + len) <= (debug_progbuf_start + sizeof(program_buffer)))) {
     memcpy(bytes, program_buffer + addr - debug_progbuf_start, len);
     return true;
@@ -119,16 +119,16 @@ bool debug_module_t::store(reg_t addr, size_t len, const uint8_t* bytes)
   }
 
   addr = DEBUG_START + addr;
-  
+
   if (addr >= debug_data_start && (addr + len) <= (debug_data_start + sizeof(dmdata))) {
     memcpy(dmdata + addr - debug_data_start, bytes, len);
     return true;
   }
-  
+
   if (addr >= debug_progbuf_start && ((addr + len) <= (debug_progbuf_start + sizeof(program_buffer)))) {
     fprintf(stderr, "Successful write to program buffer %d bytes at %x\n", (int) len, (int) addr);
     memcpy(program_buffer + addr - debug_progbuf_start, bytes, len);
-    
+
     return true;
   }
 
@@ -206,18 +206,26 @@ bool debug_module_t::dmi_read(unsigned address, uint32_t *value)
   if (address >= DMI_DATA0 && address < DMI_DATA0 + abstractcs.datacount) {
     unsigned i = address - DMI_DATA0;
     result = read32(dmdata, i);
+    if (abstractcs.busy) {
+      result = -1;
+      fprintf(stderr, "\ndmi_read(0x%02x (data[%d]) -> -1 because abstractcs.busy==true\n", address, i);
+    }
 
     if (abstractcs.busy && abstractcs.cmderr == CMDERR_NONE) {
       abstractcs.cmderr = CMDERR_BUSY;
     }
 
-    if ((abstractauto.autoexecdata >> i) & 1){
+    if (!abstractcs.busy && ((abstractauto.autoexecdata >> i) & 1)) {
       perform_abstract_command();
     }
   } else if (address >= DMI_PROGBUF0 && address < DMI_PROGBUF0 + progsize) {
     unsigned i = address - DMI_PROGBUF0;
     result = read32(program_buffer, i);
-    if ((abstractauto.autoexecprogbuf >> i) & 1) {
+    if (abstractcs.busy) {
+      result = -1;
+      fprintf(stderr, "\ndmi_read(0x%02x (progbuf[%d]) -> -1 because abstractcs.busy==true\n", address, i);
+    }
+    if (!abstractcs.busy && ((abstractauto.autoexecprogbuf >> i) & 1)) {
       perform_abstract_command();
     }
 
@@ -268,7 +276,7 @@ bool debug_module_t::dmi_read(unsigned address, uint32_t *value)
           } else {
             dmstatus.allresumeack = false;
           }
-          
+
 	  result = set_field(result, DMI_DMSTATUS_ALLNONEXISTENT, dmstatus.allnonexistant);
 	  result = set_field(result, DMI_DMSTATUS_ALLUNAVAIL, dmstatus.allunavail);
 	  result = set_field(result, DMI_DMSTATUS_ALLRUNNING, dmstatus.allrunning);
@@ -373,7 +381,7 @@ bool debug_module_t::perform_abstract_command()
       //NOP
       write32(debug_abstract, 0, addi(ZERO, ZERO, 0));
     }
-    
+
     if (get_field(command, AC_ACCESS_REGISTER_POSTEXEC)) {
       // Since the next instruction is what we will use, just use nother NOP
       // to get there.
@@ -383,7 +391,7 @@ bool debug_module_t::perform_abstract_command()
     }
 
     debug_rom_flags[dmcontrol.hartsel] |= 1 << DEBUG_ROM_FLAG_GO;
-    
+
     abstractcs.busy = true;
   } else {
     abstractcs.cmderr = CMDERR_NOTSUP;
@@ -396,27 +404,29 @@ bool debug_module_t::dmi_write(unsigned address, uint32_t value)
   D(fprintf(stderr, "dmi_write(0x%x, 0x%x)\n", address, value));
   if (address >= DMI_DATA0 && address < DMI_DATA0 + abstractcs.datacount) {
     unsigned i = address - DMI_DATA0;
-    write32(dmdata, address - DMI_DATA0, value);
+    if (!abstractcs.busy)
+      write32(dmdata, address - DMI_DATA0, value);
 
     if (abstractcs.busy && abstractcs.cmderr == CMDERR_NONE) {
       abstractcs.cmderr = CMDERR_BUSY;
     }
 
-    if ((abstractauto.autoexecdata >> i) & 1) {
+    if (!abstractcs.busy && ((abstractauto.autoexecdata >> i) & 1)) {
       perform_abstract_command();
     }
     return true;
 
   } else if (address >= DMI_PROGBUF0 && address < DMI_PROGBUF0 + progsize) {
     unsigned i = address - DMI_PROGBUF0;
-    
-    write32(program_buffer, i, value);
 
-    if ((abstractauto.autoexecprogbuf >> i) & 1) {
+    if (!abstractcs.busy)
+      write32(program_buffer, i, value);
+
+    if (!abstractcs.busy && ((abstractauto.autoexecprogbuf >> i) & 1)) {
       perform_abstract_command();
     }
     return true;
-    
+
   } else {
     switch (address) {
       case DMI_DMCONTROL:
@@ -437,6 +447,9 @@ bool debug_module_t::dmi_write(unsigned address, uint32_t value)
               debug_rom_flags[dmcontrol.hartsel] |= (1 << DEBUG_ROM_FLAG_RESUME);
               resumeack[dmcontrol.hartsel] = false;
             }
+	    if (dmcontrol.ndmreset) {
+	      proc->reset();
+	    }
           }
         }
         return true;
@@ -450,9 +463,11 @@ bool debug_module_t::dmi_write(unsigned address, uint32_t value)
         return true;
 
       case DMI_ABSTRACTAUTO:
-        abstractauto.autoexecprogbuf = get_field(value, DMI_ABSTRACTAUTO_AUTOEXECPROGBUF);
-        abstractauto.autoexecdata = get_field(value, DMI_ABSTRACTAUTO_AUTOEXECDATA);
-        break;
+        abstractauto.autoexecprogbuf = get_field(value,
+            DMI_ABSTRACTAUTO_AUTOEXECPROGBUF);
+        abstractauto.autoexecdata = get_field(value,
+            DMI_ABSTRACTAUTO_AUTOEXECDATA);
+        return true;
     }
   }
   return false;