diff mbox series

[PULL,v2,08/12] target/mips: Update ITU to handle bus errors

Message ID 1547830785-7079-9-git-send-email-aleksandar.markovic@rt-rk.com
State New
Headers show
Series [PULL,v2,01/12] target/mips: Move comment containing summary of CP0 registers | expand

Commit Message

Aleksandar Markovic Jan. 18, 2019, 4:59 p.m. UTC 
From: Yongbok Kim <yongbok.kim@mips.com>

Update ITU to handle bus errors.

Reviewed-by: Stefan Markovic <smarkovic@wavecomp.com>
Signed-off-by: Yongbok Kim <yongbok.kim@mips.com>
Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
---
 hw/misc/mips_itu.c | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)
diff mbox series

Patch

diff --git a/hw/misc/mips_itu.c b/hw/misc/mips_itu.c
index ee1addc..1257d8f 100644
--- a/hw/misc/mips_itu.c
+++ b/hw/misc/mips_itu.c
@@ -375,6 +375,12 @@  static void view_pv_try_write(ITCStorageCell *c)
     view_pv_common_write(c);
 }
 
+static void raise_exception(int excp)
+{
+    current_cpu->exception_index = excp;
+    cpu_loop_exit(current_cpu);
+}
+
 static uint64_t itc_storage_read(void *opaque, hwaddr addr, unsigned size)
 {
     MIPSITUState *s = (MIPSITUState *)opaque;
@@ -382,6 +388,14 @@  static uint64_t itc_storage_read(void *opaque, hwaddr addr, unsigned size)
     ITCView view = get_itc_view(addr);
     uint64_t ret = -1;
 
+    switch (size) {
+    case 1:
+    case 2:
+        s->icr0 |= 1 << ITC_ICR0_ERR_AXI;
+        raise_exception(EXCP_DBE);
+        return 0;
+    }
+
     switch (view) {
     case ITCVIEW_BYPASS:
         ret = view_bypass_read(cell);
@@ -420,6 +434,14 @@  static void itc_storage_write(void *opaque, hwaddr addr, uint64_t data,
     ITCStorageCell *cell = get_cell(s, addr);
     ITCView view = get_itc_view(addr);
 
+    switch (size) {
+    case 1:
+    case 2:
+        s->icr0 |= 1 << ITC_ICR0_ERR_AXI;
+        raise_exception(EXCP_DBE);
+        return;
+    }
+
     switch (view) {
     case ITCVIEW_BYPASS:
         view_bypass_write(cell, data);