1 files changed, 0 insertions, 105 deletions
diff --git a/debug_rom/debug_rom.S b/debug_rom/debug_rom.S
deleted file mode 100755
index 230f4b4..0000000
--- a/debug_rom/debug_rom.S
+++ /dev/null
@@ -1,105 +0,0 @@
-# This code should be functional. Doesn't have to be optimal.
-# I'm writing it to prove that it can be done.
-
-# 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 MCPUID                  0xf00
-#define MHARTID                 0xf10
-
-#define DEBUG_RAM               0x400
-#define DEBUG_RAM_SIZE          64
-
-#define SETHALTNOT              0x100
-#define CLEARHALTNOT            0x104
-#define CLEARDEBINT             0x108
-
-        .global entry
-        .global resume
-
-        # Automatically called when Debug Mode is first entered.
-entry:  j       _entry
-        # Should be called by Debug RAM code that has finished execution and
-        # wants to return to Debug Mode.
-resume:
-        # Clear debug interrupt.
-clear_debint:
-        csrr    s1, MHARTID
-        sw      s1, CLEARDEBINT(zero)
-clear_debint_loop:
-        csrr    s1, DCSR
-        andi    s1, s1, (1<<DCSR_DEBUGINT_OFFSET)
-        bnez    s1, wait_for_interrupt
-
-        # Restore s1.
-        csrr    s1, MCPUID
-        bltz    s1, restore_not_32
-restore_32:
-        lw      s1, (DEBUG_RAM + DEBUG_RAM_SIZE - 4)(zero)
-        j       check_halt
-restore_not_32:
-        slli    s1, s1, 1
-        bltz    s1, restore_128
-restore_64:
-        ld      s1, (DEBUG_RAM + DEBUG_RAM_SIZE - 8)(zero)
-        j       check_halt
-restore_128:
-        nop     #lq      s1, (DEBUG_RAM + DEBUG_RAM_SIZE - 16)(zero)
-
-check_halt:
-        csrr    s0, DCSR
-        andi    s0, s0, (1<<DCSR_HALT_OFFSET)
-        beqz    s0, exit
-        j       wait_for_interrupt
-
-exit:
-        # Restore s0.
-        csrr    s0, DSCRATCH
-        eret
-
-
-_entry:
-        # Save s0 in DSCRATCH
-        csrw    DSCRATCH, s0
-
-        # Check why we're here
-        csrr    s0, DCSR
-        # cause is in bits 2:0 of dcsr
-        andi    s0, s0, 7
-        addi    s0, s0, -DCSR_CAUSE_DEBINT
-        bnez    s0, spontaneous_halt
-
-jdebugram:
-        # Save s1 so that the debug program can use two registers.
-        csrr    s0, MCPUID
-        bltz    s0, save_not_32
-save_32:
-        sw      s1, (DEBUG_RAM + DEBUG_RAM_SIZE - 4)(zero)
-        jr      zero, DEBUG_RAM
-save_not_32:
-        slli    s0, s0, 1
-        bltz    s0, save_128
-save_64:
-        sd      s1, (DEBUG_RAM + DEBUG_RAM_SIZE - 8)(zero)
-        jr      zero, DEBUG_RAM
-save_128:
-        nop     #sq      s1, (DEBUG_RAM + DEBUG_RAM_SIZE - 16)(zero)
-        jr      zero, DEBUG_RAM
-
-spontaneous_halt:
-        csrr    s0, MHARTID
-        sw      s0, SETHALTNOT(zero)
-        csrsi   DCSR, DCSR_HALT_OFFSET
-
-wait_for_interrupt:
-        csrr    s0, DCSR
-        andi    s0, s0, (1<<DCSR_DEBUGINT_OFFSET)
-        beqz    s0, wait_for_interrupt
-
-        j       jdebugram