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xilinx_spips: Trash LQ page cache on mode change

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Invalidate the LQSPI cached page when transitioning into LQSPI mode.
Otherwise there is a possibility that the controller will return stale
data to the guest when transitioning back to LQ_MODE after a page
program.

Signed-off-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
Message-id: 677490a6ee1953fe5d366e599d665de645ac84db.1369117359.git.peter.crosthwaite@xilinx.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Crosthwaite 2013-06-03 17:17:42 +01:00 committed by Peter Maydell
parent 10e60b35d0
commit b5cd9143e7
1 changed files with 24 additions and 1 deletions
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25
hw/ssi/xilinx_spips.c
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@ -165,6 +165,8 @@ typedef struct {
typedef struct XilinxSPIPSClass {
SysBusDeviceClass parent_class;
const MemoryRegionOps *reg_ops;
uint32_t rx_fifo_size;
uint32_t tx_fifo_size;
} XilinxSPIPSClass;
@ -462,6 +464,25 @@ static const MemoryRegionOps spips_ops = {
.endianness = DEVICE_LITTLE_ENDIAN,
};
static void xilinx_qspips_write(void *opaque, hwaddr addr,
uint64_t value, unsigned size)
{
XilinxQSPIPS *q = XILINX_QSPIPS(opaque);
xilinx_spips_write(opaque, addr, value, size);
addr >>= 2;
if (addr == R_LQSPI_CFG) {
q->lqspi_cached_addr = ~0ULL;
}
}
static const MemoryRegionOps qspips_ops = {
.read = xilinx_spips_read,
.write = xilinx_qspips_write,
.endianness = DEVICE_LITTLE_ENDIAN,
};
#define LQSPI_CACHE_SIZE 1024
static uint64_t
@ -565,7 +586,7 @@ static void xilinx_spips_realize(DeviceState *dev, Error **errp)
sysbus_init_irq(sbd, &s->cs_lines[i]);
}
memory_region_init_io(&s->iomem, &spips_ops, s, "spi", R_MAX*4);
memory_region_init_io(&s->iomem, xsc->reg_ops, s, "spi", R_MAX*4);
sysbus_init_mmio(sbd, &s->iomem);
s->irqline = -1;
@ -629,6 +650,7 @@ static void xilinx_qspips_class_init(ObjectClass *klass, void * data)
XilinxSPIPSClass *xsc = XILINX_SPIPS_CLASS(klass);
dc->realize = xilinx_qspips_realize;
xsc->reg_ops = &qspips_ops;
xsc->rx_fifo_size = RXFF_A_Q;
xsc->tx_fifo_size = TXFF_A_Q;
}
@ -643,6 +665,7 @@ static void xilinx_spips_class_init(ObjectClass *klass, void *data)
dc->props = xilinx_spips_properties;
dc->vmsd = &vmstate_xilinx_spips;
xsc->reg_ops = &spips_ops;
xsc->rx_fifo_size = RXFF_A;
xsc->tx_fifo_size = TXFF_A;
}