diff options
Diffstat (limited to 'debug_rom/debug_rom.S')
| -rwxr-xr-x | debug_rom/debug_rom.S | 30 |
1 files changed, 11 insertions, 19 deletions
diff --git a/debug_rom/debug_rom.S b/debug_rom/debug_rom.S index c164eeb..0d97270 100755 --- a/debug_rom/debug_rom.S +++ b/debug_rom/debug_rom.S @@ -5,13 +5,6 @@ # TODO: Update these constants once they're finalized in the doc. -#define DCSR 0x790 -#define DCSR_CAUSE_DEBINT 3 -#define DCSR_HALT_OFFSET 3 -#define DCSR_DEBUGINT_OFFSET 10 - -#define DSCRATCH 0x792 - #define DEBUG_RAM 0x400 #define DEBUG_RAM_SIZE 64 @@ -63,26 +56,25 @@ restore_128: sw s0, (DEBUG_RAM + DEBUG_RAM_SIZE - 4)(zero) check_halt: - csrr s0, DCSR - andi s0, s0, (1<<DCSR_HALT_OFFSET) + csrr s0, CSR_DCSR + andi s0, s0, DCSR_HALT beqz s0, exit j wait_for_interrupt exit: # Restore s0. - csrr s0, DSCRATCH - dret - + csrr s0, CSR_DSCRATCH + .word 0x79200073 # TODO: dret _entry: # Save s0 in DSCRATCH - csrw DSCRATCH, s0 + csrw CSR_DSCRATCH, s0 # Check why we're here - csrr s0, DCSR + csrr s0, CSR_DCSR # cause is in bits 2:0 of dcsr - andi s0, s0, 7 - addi s0, s0, -DCSR_CAUSE_DEBINT + andi s0, s0, DCSR_CAUSE + addi s0, s0, -DCSR_CAUSE_DEBUGINT bnez s0, spontaneous_halt jdebugram: @@ -106,11 +98,11 @@ save_128: spontaneous_halt: csrr s0, CSR_MHARTID sw s0, SETHALTNOT(zero) - csrsi DCSR, (1<<DCSR_HALT_OFFSET) + csrsi CSR_DCSR, DCSR_HALT wait_for_interrupt: - csrr s0, DCSR - andi s0, s0, (1<<DCSR_DEBUGINT_OFFSET) + csrr s0, CSR_DCSR + andi s0, s0, DCSR_DEBUGINT beqz s0, wait_for_interrupt j jdebugram |