Add console interrupt support

1 files changed, 24 insertions, 2 deletions

diff --git a/assembly/extint-test/extint-test.S b/assembly/extint-test/extint-test.S
index c1b872d..68a218c 100644
--- a/assembly/extint-test/extint-test.S
+++ b/assembly/extint-test/extint-test.S
@@ -4,8 +4,8 @@ la t0,handler
 csrw mtvec,t0 # Set up trap handler
 li t0,0x400
 csrc mstatush,t0 # Turn off MDT
-li t0,0x30000
-csrw mie,t0 # Mask all interrupts except mesecons/digilines
+li t0,0x70000
+csrw mie,t0 # Mask all interrupts except mesecons/digilines/console
 csrw mip,zero # Clear any pending interrupts
 csrsi mstatus,0x8 # Turn on MIE to enable interrupts
 
@@ -43,12 +43,16 @@ sw x30,120(x31) # and write that back out too
 
 csrr t0,mcause # Read why the trap occurred
 
+
 li t1,0x80000010 # Interrupt 16 = mesecons
 beq t0,t1,handler_mesecons
 
 li t1,0x80000011 # Interrupt 17 = digilines
 beq t0,t1,handler_digilines
 
+li t1,0x80000012 # Interrupt 18 = console
+beq t0,t1,handler_console
+
 j handler_other # Something else
 
 handler_mesecons:
@@ -100,6 +104,23 @@ ecall # Clear out any other digilines messages
 
 j handler_epilogue
 
+handler_console:
+li a7,4
+la a0,consolemsg
+ecall # Show that this was a console event
+
+li a7,132
+ecall # Read the first character from the input buffer
+li a7,11
+ecall # And print it
+li a0,'\n'
+ecall # Followed by a line feed
+
+li a7,131
+ecall # Discard the rest
+
+j handler_epilogue
+
 handler_other:
 li a7,4
 la a0,unimplementedmsg
@@ -140,6 +161,7 @@ waitingmsg: .asciz "Waiting...\n"
 meseconsmsg: .asciz "Mesecons event!\nInput value: "
 digilinesmsg: .asciz "Digilines event!\nChannel:\n"
 digilinesmsg2: .asciz "\nMessage:\n"
+consolemsg: .asciz "Console event!\nFirst char: "
 unimplementedmsg: .asciz "Unimplemented trap!\nmcause: "
 channelbuf: .asciz "                    "
 msgbuf: .asciz "                    "