expand notifications into interrupt handlers

+ Terminology is still a bit poor, and will still have to write
  documentation + implement ipis properly

2 files changed, 8 insertions, 4 deletions

diff --git a/arch/riscv64/kernel/csr.h b/arch/riscv64/kernel/csr.h
index 9b7b78a..bc48464 100644
--- a/arch/riscv64/kernel/csr.h
+++ b/arch/riscv64/kernel/csr.h
@@ -40,6 +40,8 @@
 /** Address of \c sstatus CSR. */
 #define CSR_SSTATUS 0x100
 
+#define SR_SPIE 0b10
+
 /** Address of \c sie CSR. */
 #define CSR_SIE 0x104
 
diff --git a/arch/riscv64/kernel/irq.c b/arch/riscv64/kernel/irq.c
index 964401f..2ef15cc 100644
--- a/arch/riscv64/kernel/irq.c
+++ b/arch/riscv64/kernel/irq.c
@@ -41,12 +41,13 @@ stat_t deactivate_irq(irq_t id)
 /* very simple for now */
 void enable_irqs()
 {
-	csr_set(CSR_SSTATUS, CSR_SIE);
+	/* should be supervisor external interrupt */
+	csr_set(CSR_SIE, 1 << 9);
 }
 
 void disable_irqs()
 {
-	csr_clear(CSR_SSTATUS, CSR_SIE);
+	csr_clear(CSR_SIE, 1 << 9);
 }
 
 irq_t get_irq()
@@ -71,9 +72,10 @@ static void riscv_unknown_interrupt(long id)
  *
  * @param id ID of interrupt, with interrupt bit still set.
  */
-void riscv_handle_interrupt(long id)
+void riscv_handle_interrupt(unsigned long id)
 {
-	id = -id;
+	/* clear leading one */
+	id = (id << 1) >> 1;
 
 	switch (id) {
 	/* I think */