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-rw-r--r--hw/mips/gt64xxx_pci.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/hw/mips/gt64xxx_pci.c b/hw/mips/gt64xxx_pci.c
index 10fcca3..f76a9fd 100644
--- a/hw/mips/gt64xxx_pci.c
+++ b/hw/mips/gt64xxx_pci.c
@@ -275,7 +275,8 @@ static void check_reserved_space (hwaddr *start,
static void gt64120_isd_mapping(GT64120State *s)
{
- hwaddr start = s->regs[GT_ISD] << 21;
+ /* Bits 14:0 of ISD map to bits 35:21 of the start address. */
+ hwaddr start = ((hwaddr)s->regs[GT_ISD] << 21) & 0xFFFE00000ull;
hwaddr length = 0x1000;
if (s->ISD_length) {
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