diff options
Diffstat (limited to 'debug_rom/debug_rom.S')
| -rwxr-xr-x | debug_rom/debug_rom.S | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/debug_rom/debug_rom.S b/debug_rom/debug_rom.S index 2d36139..a1ddfe5 100755 --- a/debug_rom/debug_rom.S +++ b/debug_rom/debug_rom.S @@ -20,9 +20,6 @@ exception: jal zero, _exception _entry: - // This fence is required because the execution may have written something - // into the Abstract Data or Program Buffer registers. - fence csrw CSR_DSCRATCH0, s0 // Save s0 to allow signaling MHARTID // We continue to let the hart know that we are halted in order that @@ -30,6 +27,8 @@ _entry: // We keep checking both whether there is something the debugger wants // us to do, or whether we should resume. entry_loop: + // Make sure that we don't access a cached version of DEBUG_ROM_FLAGS + fence csrr s0, CSR_MHARTID sw s0, DEBUG_ROM_HALTED(zero) lbu s0, DEBUG_ROM_FLAGS(s0) // 1 byte flag per hart. Only one hart advances here. |