diff options
Diffstat (limited to 'riscv/debug_module.cc')
| -rw-r--r-- | riscv/debug_module.cc | 74 |
1 files changed, 35 insertions, 39 deletions
diff --git a/riscv/debug_module.cc b/riscv/debug_module.cc index 1d18478..bb98ada 100644 --- a/riscv/debug_module.cc +++ b/riscv/debug_module.cc @@ -8,7 +8,7 @@ #include "debug_rom/debug_rom.h" #include "debug_rom/debug_rom_defines.h" -#if 0 +#if 1 # define D(x) x #else # define D(x) @@ -23,6 +23,10 @@ debug_module_t::debug_module_t(sim_t *sim, unsigned progbufsize) : debug_abstract_start(debug_progbuf_start - debug_abstract_size*4), sim(sim) { + 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)); @@ -487,6 +491,8 @@ bool debug_module_t::perform_abstract_command() return true; } + D(fprintf(stderr, ">>> perform_abstract_command(0x%x)\n", command)); + if ((command >> 24) == 0) { // register access unsigned size = get_field(command, AC_ACCESS_REGISTER_SIZE); @@ -500,49 +506,39 @@ bool debug_module_t::perform_abstract_command() if (get_field(command, AC_ACCESS_REGISTER_TRANSFER)) { - if (regno < 0x1000 || regno >= 0x1020) { - abstractcs.cmderr = CMDERR_NOTSUP; - return true; - } - - unsigned regnum = regno - 0x1000; + if (regno >= 0x1000 && regno < 0x1020) { + unsigned regnum = regno - 0x1000; + + 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; + 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 { 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)); - } else { - write32(debug_abstract, 1, ebreak()); + if (get_field(command, AC_ACCESS_REGISTER_POSTEXEC)) { + D(fprintf(stderr, ">>> post-exec!\n")); + write32(debug_abstract, 1, + jal(ZERO, debug_progbuf_start - debug_abstract_start - 4)); + } else { + write32(debug_abstract, 1, ebreak()); + } } debug_rom_flags[dmcontrol.hartsel] |= 1 << DEBUG_ROM_FLAG_GO; |