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authorJoel Stanley <joel@jms.id.au>2019-11-19 15:12:01 +0100
committerPeter Maydell <peter.maydell@linaro.org>2019-12-16 10:46:34 +0000
commit310b5bc69213684b5c2429494c04b3300d9a3150 (patch)
treeaf7b6b28d74c6429ae350990813196d2caacb094 /hw
parentd3ff9e69b70da720dd701b7badb0bd285ce8b34b (diff)
aspeed/scu: Fix W1C behavior
This models the clock write one to clear registers, and fixes up some incorrect behavior in all of the write to clear registers. There was also a typo in one of the register definitions. Reviewed-by: Cédric Le Goater <clg@kaod.org> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Joel Stanley <joel@jms.id.au> Signed-off-by: Cédric Le Goater <clg@kaod.org> Message-id: 20191119141211.25716-8-clg@kaod.org [clg: checkpatch.pl fixes ] Signed-off-by: Cédric Le Goater <clg@kaod.org> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Diffstat (limited to 'hw')
-rw-r--r--hw/misc/aspeed_scu.c19
1 files changed, 14 insertions, 5 deletions
diff --git a/hw/misc/aspeed_scu.c b/hw/misc/aspeed_scu.c
index 717509bc54..f62fa25e34 100644
--- a/hw/misc/aspeed_scu.c
+++ b/hw/misc/aspeed_scu.c
@@ -98,7 +98,7 @@
#define AST2600_CLK_STOP_CTRL TO_REG(0x80)
#define AST2600_CLK_STOP_CTRL_CLR TO_REG(0x84)
#define AST2600_CLK_STOP_CTRL2 TO_REG(0x90)
-#define AST2600_CLK_STOP_CTR2L_CLR TO_REG(0x94)
+#define AST2600_CLK_STOP_CTRL2_CLR TO_REG(0x94)
#define AST2600_SDRAM_HANDSHAKE TO_REG(0x100)
#define AST2600_HPLL_PARAM TO_REG(0x200)
#define AST2600_HPLL_EXT TO_REG(0x204)
@@ -532,11 +532,13 @@ static uint64_t aspeed_ast2600_scu_read(void *opaque, hwaddr offset,
return s->regs[reg];
}
-static void aspeed_ast2600_scu_write(void *opaque, hwaddr offset, uint64_t data,
- unsigned size)
+static void aspeed_ast2600_scu_write(void *opaque, hwaddr offset,
+ uint64_t data64, unsigned size)
{
AspeedSCUState *s = ASPEED_SCU(opaque);
int reg = TO_REG(offset);
+ /* Truncate here so bitwise operations below behave as expected */
+ uint32_t data = data64;
if (reg >= ASPEED_AST2600_SCU_NR_REGS) {
qemu_log_mask(LOG_GUEST_ERROR,
@@ -563,15 +565,22 @@ static void aspeed_ast2600_scu_write(void *opaque, hwaddr offset, uint64_t data,
/* fall through */
case AST2600_SYS_RST_CTRL:
case AST2600_SYS_RST_CTRL2:
+ case AST2600_CLK_STOP_CTRL:
+ case AST2600_CLK_STOP_CTRL2:
/* W1S (Write 1 to set) registers */
s->regs[reg] |= data;
return;
case AST2600_SYS_RST_CTRL_CLR:
case AST2600_SYS_RST_CTRL2_CLR:
+ case AST2600_CLK_STOP_CTRL_CLR:
+ case AST2600_CLK_STOP_CTRL2_CLR:
case AST2600_HW_STRAP1_CLR:
case AST2600_HW_STRAP2_CLR:
- /* W1C (Write 1 to clear) registers */
- s->regs[reg] &= ~data;
+ /*
+ * W1C (Write 1 to clear) registers are offset by one address from
+ * the data register
+ */
+ s->regs[reg - 1] &= ~data;
return;
case AST2600_RNG_DATA: