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-rw-r--r--hw/dma/pl330.c19
1 files changed, 16 insertions, 3 deletions
diff --git a/hw/dma/pl330.c b/hw/dma/pl330.c
index b5d586b92b..608a58c47d 100644
--- a/hw/dma/pl330.c
+++ b/hw/dma/pl330.c
@@ -601,10 +601,12 @@ static inline void pl330_fault(PL330Chan *ch, uint32_t flags)
* LEN - number of elements in ARGS array
*/
-static void pl330_dmaaddh(PL330Chan *ch, uint8_t opcode, uint8_t *args, int len)
+static void pl330_dmaadxh(PL330Chan *ch, uint8_t *args, bool ra, bool neg)
{
- uint16_t im = (((uint16_t)args[1]) << 8) | ((uint16_t)args[0]);
- uint8_t ra = (opcode >> 1) & 1;
+ uint32_t im = (args[1] << 8) | args[0];
+ if (neg) {
+ im |= 0xffffu << 16;
+ }
if (ch->is_manager) {
pl330_fault(ch, PL330_FAULT_UNDEF_INSTR);
@@ -617,6 +619,16 @@ static void pl330_dmaaddh(PL330Chan *ch, uint8_t opcode, uint8_t *args, int len)
}
}
+static void pl330_dmaaddh(PL330Chan *ch, uint8_t opcode, uint8_t *args, int len)
+{
+ pl330_dmaadxh(ch, args, extract32(opcode, 1, 1), false);
+}
+
+static void pl330_dmaadnh(PL330Chan *ch, uint8_t opcode, uint8_t *args, int len)
+{
+ pl330_dmaadxh(ch, args, extract32(opcode, 1, 1), true);
+}
+
static void pl330_dmaend(PL330Chan *ch, uint8_t opcode,
uint8_t *args, int len)
{
@@ -1042,6 +1054,7 @@ static void pl330_dmawmb(PL330Chan *ch, uint8_t opcode,
/* NULL terminated array of the instruction descriptions. */
static const PL330InsnDesc insn_desc[] = {
{ .opcode = 0x54, .opmask = 0xFD, .size = 3, .exec = pl330_dmaaddh, },
+ { .opcode = 0x5c, .opmask = 0xFD, .size = 3, .exec = pl330_dmaadnh, },
{ .opcode = 0x00, .opmask = 0xFF, .size = 1, .exec = pl330_dmaend, },
{ .opcode = 0x35, .opmask = 0xFF, .size = 2, .exec = pl330_dmaflushp, },
{ .opcode = 0xA0, .opmask = 0xFD, .size = 6, .exec = pl330_dmago, },