#include "debug_defines.h"
#include "opcodes.h"
#include "mmu.h"
+#include "sim.h"
#include "debug_rom/debug_rom.h"
-#include "debug_rom/debug_rom_defines.h"
+#include "debug_rom_defines.h"
#if 0
# define D(x) x
///////////////////////// debug_module_t
-debug_module_t::debug_module_t(sim_t *sim, unsigned progsize) :
- progsize(progsize),
- program_buffer_bytes(4 + 4*progsize),
+debug_module_t::debug_module_t(sim_t *sim, unsigned progbufsize, unsigned max_bus_master_bits,
+ bool require_authentication) :
+ progbufsize(progbufsize),
+ program_buffer_bytes(4 + 4*progbufsize),
+ max_bus_master_bits(max_bus_master_bits),
+ require_authentication(require_authentication),
debug_progbuf_start(debug_data_start - program_buffer_bytes),
debug_abstract_start(debug_progbuf_start - debug_abstract_size*4),
sim(sim)
{
- dmcontrol = {0};
-
- dmstatus = {0};
- dmstatus.authenticated = 1;
- dmstatus.versionlo = 2;
-
- abstractcs = {0};
- abstractcs.progsize = progsize;
-
- abstractauto = {0};
+ D(fprintf(stderr, "debug_data_start=0x%x\n", debug_data_start));
+ D(fprintf(stderr, "debug_progbuf_start=0x%x\n", debug_progbuf_start));
+ D(fprintf(stderr, "debug_abstract_start=0x%x\n", debug_abstract_start));
program_buffer = new uint8_t[program_buffer_bytes];
memset(halted, 0, sizeof(halted));
memset(debug_rom_flags, 0, sizeof(debug_rom_flags));
memset(resumeack, 0, sizeof(resumeack));
+ memset(havereset, 0, sizeof(havereset));
memset(program_buffer, 0, program_buffer_bytes);
- program_buffer[progsize] = ebreak();
+ program_buffer[4*progbufsize] = ebreak();
+ program_buffer[4*progbufsize+1] = ebreak() >> 8;
+ program_buffer[4*progbufsize+2] = ebreak() >> 16;
+ program_buffer[4*progbufsize+3] = ebreak() >> 24;
memset(dmdata, 0, sizeof(dmdata));
write32(debug_rom_whereto, 0,
jal(ZERO, debug_abstract_start - DEBUG_ROM_WHERETO));
memset(debug_abstract, 0, sizeof(debug_abstract));
+
+ reset();
}
debug_module_t::~debug_module_t()
dmcontrol = {0};
dmstatus = {0};
- dmstatus.authenticated = 1;
- dmstatus.versionlo = 2;
+ dmstatus.impebreak = true;
+ dmstatus.authenticated = !require_authentication;
+ dmstatus.version = 2;
abstractcs = {0};
abstractcs.datacount = sizeof(dmdata) / 4;
- abstractcs.progsize = progsize;
+ abstractcs.progbufsize = progbufsize;
abstractauto = {0};
+
+ sbcs = {0};
+ if (max_bus_master_bits > 0) {
+ sbcs.version = 1;
+ sbcs.asize = sizeof(reg_t) * 8;
+ }
+ if (max_bus_master_bits >= 64)
+ sbcs.access64 = true;
+ if (max_bus_master_bits >= 32)
+ sbcs.access32 = true;
+ if (max_bus_master_bits >= 16)
+ sbcs.access16 = true;
+ if (max_bus_master_bits >= 8)
+ sbcs.access8 = true;
+
+ challenge = random();
}
void debug_module_t::add_device(bus_t *bus) {
return proc;
}
+unsigned debug_module_t::sb_access_bits()
+{
+ return 8 << sbcs.sbaccess;
+}
+
+void debug_module_t::sb_autoincrement()
+{
+ if (!sbcs.autoincrement || !max_bus_master_bits)
+ return;
+
+ uint64_t value = sbaddress[0] + sb_access_bits() / 8;
+ sbaddress[0] = value;
+ uint32_t carry = value >> 32;
+
+ value = sbaddress[1] + carry;
+ sbaddress[1] = value;
+ carry = value >> 32;
+
+ value = sbaddress[2] + carry;
+ sbaddress[2] = value;
+ carry = value >> 32;
+
+ sbaddress[3] += carry;
+}
+
+void debug_module_t::sb_read()
+{
+ reg_t address = ((uint64_t) sbaddress[1] << 32) | sbaddress[0];
+ try {
+ if (sbcs.sbaccess == 0 && max_bus_master_bits >= 8) {
+ sbdata[0] = sim->debug_mmu->load_uint8(address);
+ } else if (sbcs.sbaccess == 1 && max_bus_master_bits >= 16) {
+ sbdata[0] = sim->debug_mmu->load_uint16(address);
+ } else if (sbcs.sbaccess == 2 && max_bus_master_bits >= 32) {
+ sbdata[0] = sim->debug_mmu->load_uint32(address);
+ } else if (sbcs.sbaccess == 3 && max_bus_master_bits >= 64) {
+ uint64_t value = sim->debug_mmu->load_uint32(address);
+ sbdata[0] = value;
+ sbdata[1] = value >> 32;
+ } else {
+ sbcs.error = 3;
+ }
+ } catch (trap_load_access_fault& t) {
+ sbcs.error = 2;
+ }
+}
+
+void debug_module_t::sb_write()
+{
+ reg_t address = ((uint64_t) sbaddress[1] << 32) | sbaddress[0];
+ D(fprintf(stderr, "sb_write() 0x%x @ 0x%lx\n", sbdata[0], address));
+ if (sbcs.sbaccess == 0 && max_bus_master_bits >= 8) {
+ sim->debug_mmu->store_uint8(address, sbdata[0]);
+ } else if (sbcs.sbaccess == 1 && max_bus_master_bits >= 16) {
+ sim->debug_mmu->store_uint16(address, sbdata[0]);
+ } else if (sbcs.sbaccess == 2 && max_bus_master_bits >= 32) {
+ sim->debug_mmu->store_uint32(address, sbdata[0]);
+ } else if (sbcs.sbaccess == 3 && max_bus_master_bits >= 64) {
+ sim->debug_mmu->store_uint64(address,
+ (((uint64_t) sbdata[1]) << 32) | sbdata[0]);
+ } else {
+ sbcs.error = 3;
+ }
+}
+
bool debug_module_t::dmi_read(unsigned address, uint32_t *value)
{
uint32_t result = 0;
if (!abstractcs.busy && ((abstractauto.autoexecdata >> i) & 1)) {
perform_abstract_command();
}
- } else if (address >= DMI_PROGBUF0 && address < DMI_PROGBUF0 + progsize) {
+ } else if (address >= DMI_PROGBUF0 && address < DMI_PROGBUF0 + progbufsize) {
unsigned i = address - DMI_PROGBUF0;
result = read32(program_buffer, i);
if (abstractcs.busy) {
result = set_field(result, DMI_DMCONTROL_HALTREQ, dmcontrol.haltreq);
result = set_field(result, DMI_DMCONTROL_RESUMEREQ, dmcontrol.resumereq);
- result = set_field(result, DMI_DMCONTROL_HARTSEL, dmcontrol.hartsel);
+ result = set_field(result, ((1L<<hartsellen)-1) <<
+ DMI_DMCONTROL_HARTSEL_OFFSET, dmcontrol.hartsel);
result = set_field(result, DMI_DMCONTROL_HARTRESET, dmcontrol.hartreset);
result = set_field(result, DMI_DMCONTROL_NDMRESET, dmcontrol.ndmreset);
result = set_field(result, DMI_DMCONTROL_DMACTIVE, dmcontrol.dmactive);
dmstatus.allresumeack = false;
}
+ result = set_field(result, DMI_DMSTATUS_IMPEBREAK,
+ dmstatus.impebreak);
+ result = set_field(result, DMI_DMSTATUS_ALLHAVERESET,
+ havereset[dmcontrol.hartsel]);
+ result = set_field(result, DMI_DMSTATUS_ANYHAVERESET,
+ havereset[dmcontrol.hartsel]);
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);
result = set_field(result, DMI_DMSTATUS_ANYRESUMEACK, dmstatus.anyresumeack);
result = set_field(result, DMI_DMSTATUS_AUTHENTICATED, dmstatus.authenticated);
result = set_field(result, DMI_DMSTATUS_AUTHBUSY, dmstatus.authbusy);
- result = set_field(result, DMI_DMSTATUS_VERSIONHI, dmstatus.versionhi);
- result = set_field(result, DMI_DMSTATUS_VERSIONLO, dmstatus.versionlo);
+ result = set_field(result, DMI_DMSTATUS_VERSION, dmstatus.version);
}
break;
case DMI_ABSTRACTCS:
result = set_field(result, DMI_ABSTRACTCS_CMDERR, abstractcs.cmderr);
result = set_field(result, DMI_ABSTRACTCS_BUSY, abstractcs.busy);
result = set_field(result, DMI_ABSTRACTCS_DATACOUNT, abstractcs.datacount);
- result = set_field(result, DMI_ABSTRACTCS_PROGSIZE, abstractcs.progsize);
+ result = set_field(result, DMI_ABSTRACTCS_PROGBUFSIZE,
+ abstractcs.progbufsize);
break;
case DMI_ABSTRACTAUTO:
result = set_field(result, DMI_ABSTRACTAUTO_AUTOEXECPROGBUF, abstractauto.autoexecprogbuf);
result = set_field(result, DMI_HARTINFO_DATASIZE, abstractcs.datacount);
result = set_field(result, DMI_HARTINFO_DATAADDR, debug_data_start);
break;
+ case DMI_SBCS:
+ result = set_field(result, DMI_SBCS_SBVERSION, sbcs.version);
+ result = set_field(result, DMI_SBCS_SBREADONADDR, sbcs.readonaddr);
+ result = set_field(result, DMI_SBCS_SBACCESS, sbcs.sbaccess);
+ result = set_field(result, DMI_SBCS_SBAUTOINCREMENT, sbcs.autoincrement);
+ result = set_field(result, DMI_SBCS_SBREADONDATA, sbcs.readondata);
+ result = set_field(result, DMI_SBCS_SBERROR, sbcs.error);
+ result = set_field(result, DMI_SBCS_SBASIZE, sbcs.asize);
+ result = set_field(result, DMI_SBCS_SBACCESS128, sbcs.access128);
+ result = set_field(result, DMI_SBCS_SBACCESS64, sbcs.access64);
+ result = set_field(result, DMI_SBCS_SBACCESS32, sbcs.access32);
+ result = set_field(result, DMI_SBCS_SBACCESS16, sbcs.access16);
+ result = set_field(result, DMI_SBCS_SBACCESS8, sbcs.access8);
+ break;
+ case DMI_SBADDRESS0:
+ result = sbaddress[0];
+ break;
+ case DMI_SBADDRESS1:
+ result = sbaddress[1];
+ break;
+ case DMI_SBADDRESS2:
+ result = sbaddress[2];
+ break;
+ case DMI_SBADDRESS3:
+ result = sbaddress[3];
+ break;
+ case DMI_SBDATA0:
+ result = sbdata[0];
+ if (sbcs.error == 0) {
+ sb_autoincrement();
+ if (sbcs.readondata) {
+ sb_read();
+ }
+ }
+ break;
+ case DMI_SBDATA1:
+ result = sbdata[1];
+ break;
+ case DMI_SBDATA2:
+ result = sbdata[2];
+ break;
+ case DMI_SBDATA3:
+ result = sbdata[3];
+ break;
+ case DMI_AUTHDATA:
+ result = challenge;
+ break;
default:
result = 0;
D(fprintf(stderr, "Unexpected. Returning Error."));
return true;
}
+ unsigned i = 0;
if (get_field(command, AC_ACCESS_REGISTER_TRANSFER)) {
- if (regno < 0x1000 || regno >= 0x1020) {
- abstractcs.cmderr = CMDERR_NOTSUP;
- return true;
- }
+ if (regno < 0x1000 && progbufsize < 2) {
+ // Make the debugger use the program buffer if it's available, so it
+ // can test both use cases.
+ write32(debug_abstract, i++, csrw(S0, CSR_DSCRATCH));
+
+ if (write) {
+ switch (size) {
+ case 2:
+ write32(debug_abstract, i++, lw(S0, ZERO, debug_data_start));
+ break;
+ case 3:
+ write32(debug_abstract, i++, ld(S0, ZERO, debug_data_start));
+ break;
+ default:
+ abstractcs.cmderr = CMDERR_NOTSUP;
+ return true;
+ }
+ write32(debug_abstract, i++, csrw(S0, regno));
+
+ } else {
+ write32(debug_abstract, i++, csrr(S0, regno));
+ switch (size) {
+ case 2:
+ write32(debug_abstract, i++, sw(S0, ZERO, debug_data_start));
+ break;
+ case 3:
+ write32(debug_abstract, i++, sd(S0, ZERO, debug_data_start));
+ break;
+ default:
+ abstractcs.cmderr = CMDERR_NOTSUP;
+ return true;
+ }
+ }
+ write32(debug_abstract, i++, csrr(S0, CSR_DSCRATCH));
+
+ } else if (regno >= 0x1000 && regno < 0x1020) {
+ unsigned regnum = regno - 0x1000;
+
+ switch (size) {
+ case 2:
+ if (write)
+ write32(debug_abstract, i++, lw(regnum, ZERO, debug_data_start));
+ else
+ write32(debug_abstract, i++, sw(regnum, ZERO, debug_data_start));
+ break;
+ case 3:
+ if (write)
+ write32(debug_abstract, i++, ld(regnum, ZERO, debug_data_start));
+ else
+ write32(debug_abstract, i++, sd(regnum, ZERO, debug_data_start));
+ break;
+ default:
+ abstractcs.cmderr = CMDERR_NOTSUP;
+ return true;
+ }
- unsigned regnum = regno - 0x1000;
+ } else if (regno >= 0x1020 && regno < 0x1040) {
+ // Don't force the debugger to use progbuf if it exists, so the
+ // debugger has to make the decision not to use abstract commands to
+ // access 64-bit FPRs on 32-bit targets.
+ unsigned fprnum = regno - 0x1020;
+
+ if (write) {
+ switch (size) {
+ case 2:
+ write32(debug_abstract, i++, flw(fprnum, ZERO, debug_data_start));
+ break;
+ case 3:
+ write32(debug_abstract, i++, fld(fprnum, ZERO, debug_data_start));
+ break;
+ default:
+ abstractcs.cmderr = CMDERR_NOTSUP;
+ return true;
+ }
- switch (size) {
- case 2:
- if (write)
- write32(debug_abstract, 0, lw(regnum, ZERO, debug_data_start));
- else
- write32(debug_abstract, 0, sw(regnum, ZERO, debug_data_start));
- break;
- case 3:
- if (write)
- write32(debug_abstract, 0, ld(regnum, ZERO, debug_data_start));
- else
- write32(debug_abstract, 0, sd(regnum, ZERO, debug_data_start));
- break;
- /*
- case 4:
- if (write)
- write32(debug_rom_code, 0, lq(regnum, ZERO, debug_data_start));
- else
- write32(debug_rom_code, 0, sq(regnum, ZERO, debug_data_start));
- break;
- */
- default:
+ } else {
+ switch (size) {
+ case 2:
+ write32(debug_abstract, i++, fsw(fprnum, ZERO, debug_data_start));
+ break;
+ case 3:
+ write32(debug_abstract, i++, fsd(fprnum, ZERO, debug_data_start));
+ break;
+ default:
+ abstractcs.cmderr = CMDERR_NOTSUP;
+ return true;
+ }
+ }
+
+ } else {
abstractcs.cmderr = CMDERR_NOTSUP;
return true;
}
- } else {
- //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.
- write32(debug_abstract, 1, addi(ZERO, ZERO, 0));
+ write32(debug_abstract, i,
+ jal(ZERO, debug_progbuf_start - debug_abstract_start - 4 * i));
+ i++;
} else {
- write32(debug_abstract, 1, ebreak());
+ write32(debug_abstract, i++, ebreak());
}
debug_rom_flags[dmcontrol.hartsel] |= 1 << DEBUG_ROM_FLAG_GO;
bool debug_module_t::dmi_write(unsigned address, uint32_t value)
{
D(fprintf(stderr, "dmi_write(0x%x, 0x%x)\n", address, value));
+
+ if (!dmstatus.authenticated && address != DMI_AUTHDATA &&
+ address != DMI_DMCONTROL)
+ return false;
+
if (address >= DMI_DATA0 && address < DMI_DATA0 + abstractcs.datacount) {
unsigned i = address - DMI_DATA0;
if (!abstractcs.busy)
}
return true;
- } else if (address >= DMI_PROGBUF0 && address < DMI_PROGBUF0 + progsize) {
+ } else if (address >= DMI_PROGBUF0 && address < DMI_PROGBUF0 + progbufsize) {
unsigned i = address - DMI_PROGBUF0;
if (!abstractcs.busy)
switch (address) {
case DMI_DMCONTROL:
{
+ if (!dmcontrol.dmactive && get_field(value, DMI_DMCONTROL_DMACTIVE))
+ reset();
dmcontrol.dmactive = get_field(value, DMI_DMCONTROL_DMACTIVE);
+ if (!dmstatus.authenticated)
+ return true;
if (dmcontrol.dmactive) {
dmcontrol.haltreq = get_field(value, DMI_DMCONTROL_HALTREQ);
dmcontrol.resumereq = get_field(value, DMI_DMCONTROL_RESUMEREQ);
dmcontrol.hartreset = get_field(value, DMI_DMCONTROL_HARTRESET);
dmcontrol.ndmreset = get_field(value, DMI_DMCONTROL_NDMRESET);
- dmcontrol.hartsel = get_field(value, DMI_DMCONTROL_HARTSEL);
- } else {
- reset();
+ dmcontrol.hartsel = get_field(value, ((1L<<hartsellen)-1) <<
+ DMI_DMCONTROL_HARTSEL_OFFSET);
+ if (get_field(value, DMI_DMCONTROL_ACKHAVERESET)) {
+ havereset[dmcontrol.hartsel] = false;
+ }
}
processor_t *proc = current_proc();
if (proc) {
abstractauto.autoexecdata = get_field(value,
DMI_ABSTRACTAUTO_AUTOEXECDATA);
return true;
+ case DMI_SBCS:
+ sbcs.readonaddr = get_field(value, DMI_SBCS_SBREADONADDR);
+ sbcs.sbaccess = get_field(value, DMI_SBCS_SBACCESS);
+ sbcs.autoincrement = get_field(value, DMI_SBCS_SBAUTOINCREMENT);
+ sbcs.readondata = get_field(value, DMI_SBCS_SBREADONDATA);
+ sbcs.error &= ~get_field(value, DMI_SBCS_SBERROR);
+ return true;
+ case DMI_SBADDRESS0:
+ sbaddress[0] = value;
+ if (sbcs.error == 0 && sbcs.readonaddr) {
+ sb_read();
+ }
+ return true;
+ case DMI_SBADDRESS1:
+ sbaddress[1] = value;
+ return true;
+ case DMI_SBADDRESS2:
+ sbaddress[2] = value;
+ return true;
+ case DMI_SBADDRESS3:
+ sbaddress[3] = value;
+ return true;
+ case DMI_SBDATA0:
+ sbdata[0] = value;
+ if (sbcs.error == 0) {
+ sb_write();
+ if (sbcs.autoincrement && sbcs.error == 0) {
+ sb_autoincrement();
+ }
+ }
+ return true;
+ case DMI_SBDATA1:
+ sbdata[1] = value;
+ return true;
+ case DMI_SBDATA2:
+ sbdata[2] = value;
+ return true;
+ case DMI_SBDATA3:
+ sbdata[3] = value;
+ return true;
+ case DMI_AUTHDATA:
+ D(fprintf(stderr, "debug authentication: got 0x%x; 0x%x unlocks\n", value,
+ challenge + secret));
+ if (require_authentication) {
+ if (value == challenge + secret) {
+ dmstatus.authenticated = true;
+ } else {
+ dmstatus.authenticated = false;
+ challenge = random();
+ }
+ }
+ return true;
}
}
return false;
}
+
+void debug_module_t::proc_reset(unsigned id)
+{
+ havereset[id] = true;
+ halted[id] = false;
+}
projects / riscv-isa-sim.git / blobdiff