Add bootargs command-line option to Spike

We add bootargs command-line option to Spike which allows us to
provide custom kernel parameters to Linux and Xvisor.

Signed-off-by: Anup Patel <anup.patel@wdc.com>

1 files changed, 4 insertions, 1 deletions

diff --git a/spike_main/spike.cc b/spike_main/spike.cc
index d4e572c..1f5b771 100644
--- a/spike_main/spike.cc
+++ b/spike_main/spike.cc
@@ -51,6 +51,7 @@ static void help(int exit_code = 1)
   fprintf(stderr, "  --dump-dts            Print device tree string and exit\n");
   fprintf(stderr, "  --disable-dtb         Don't write the device tree blob into memory\n");
   fprintf(stderr, "  --initrd=<path>       Load kernel initrd into memory\n");
+  fprintf(stderr, "  --bootargs=<args>     Provide custom bootargs for kernel [default: console=hvc0 earlycon=sbi]\n");
   fprintf(stderr, "  --real-time-clint     Increment clint time at real-time rate\n");
   fprintf(stderr, "  --dm-progsize=<words> Progsize for the debug module [default 2]\n");
   fprintf(stderr, "  --dm-sba=<bits>       Debug bus master supports up to "
@@ -191,6 +192,7 @@ int main(int argc, char** argv)
   size_t nprocs = 1;
   size_t initrd_size;
   reg_t initrd_start = 0, initrd_end = 0;
+  const char* bootargs = NULL;
   reg_t start_pc = reg_t(-1);
   std::vector<std::pair<reg_t, mem_t*>> mems;
   std::vector<std::pair<reg_t, abstract_device_t*>> plugin_devices;
@@ -301,6 +303,7 @@ int main(int argc, char** argv)
   parser.option(0, "disable-dtb", 0, [&](const char *s){dtb_enabled = false;});
   parser.option(0, "dtb", 1, [&](const char *s){dtb_file = s;});
   parser.option(0, "initrd", 1, [&](const char* s){initrd = s;});
+  parser.option(0, "bootargs", 1, [&](const char* s){bootargs = s;});
   parser.option(0, "real-time-clint", 0, [&](const char *s){real_time_clint = true;});
   parser.option(0, "extlib", 1, [&](const char *s){
     void *lib = dlopen(s, RTLD_NOW | RTLD_GLOBAL);
@@ -351,7 +354,7 @@ int main(int argc, char** argv)
   }
 
   sim_t s(isa, priv, varch, nprocs, halted, real_time_clint,
-      initrd_start, initrd_end, start_pc, mems, plugin_devices, htif_args,
+      initrd_start, initrd_end, bootargs, start_pc, mems, plugin_devices, htif_args,
       std::move(hartids), dm_config, log_path, dtb_enabled, dtb_file);
   std::unique_ptr<remote_bitbang_t> remote_bitbang((remote_bitbang_t *) NULL);
   std::unique_ptr<jtag_dtm_t> jtag_dtm(