diff options
Diffstat (limited to 'hw')
-rw-r--r-- | hw/fsi/lbus.c | 78 | ||||
-rw-r--r-- | hw/fsi/trace-events | 2 |
2 files changed, 78 insertions, 2 deletions
diff --git a/hw/fsi/lbus.c b/hw/fsi/lbus.c index 44d2319..20495f4 100644 --- a/hw/fsi/lbus.c +++ b/hw/fsi/lbus.c @@ -8,11 +8,12 @@ #include "qemu/osdep.h" #include "qapi/error.h" #include "hw/fsi/lbus.h" - #include "hw/qdev-properties.h" - +#include "qemu/log.h" #include "trace.h" +#define TO_REG(offset) ((offset) >> 2) + static void fsi_lbus_init(Object *o) { FSILBus *lbus = FSI_LBUS(o); @@ -34,10 +35,83 @@ static const TypeInfo fsi_lbus_device_type_info = { .abstract = true, }; +static uint64_t fsi_scratchpad_read(void *opaque, hwaddr addr, unsigned size) +{ + FSIScratchPad *s = SCRATCHPAD(opaque); + int reg = TO_REG(addr); + + trace_fsi_scratchpad_read(addr, size); + + if (reg >= FSI_SCRATCHPAD_NR_REGS) { + qemu_log_mask(LOG_GUEST_ERROR, + "%s: Out-of-bounds read at offset 0x%" HWADDR_PRIx "\n", + __func__, addr); + return 0; + } + + return s->regs[reg]; +} + +static void fsi_scratchpad_write(void *opaque, hwaddr addr, uint64_t data, + unsigned size) +{ + FSIScratchPad *s = SCRATCHPAD(opaque); + + trace_fsi_scratchpad_write(addr, size, data); + int reg = TO_REG(addr); + + if (reg >= FSI_SCRATCHPAD_NR_REGS) { + qemu_log_mask(LOG_GUEST_ERROR, + "%s: Out-of-bounds write at offset 0x%" HWADDR_PRIx "\n", + __func__, addr); + return; + } + + s->regs[reg] = data; +} + +static const struct MemoryRegionOps scratchpad_ops = { + .read = fsi_scratchpad_read, + .write = fsi_scratchpad_write, + .endianness = DEVICE_BIG_ENDIAN, +}; + +static void fsi_scratchpad_realize(DeviceState *dev, Error **errp) +{ + FSILBusDevice *ldev = FSI_LBUS_DEVICE(dev); + + memory_region_init_io(&ldev->iomem, OBJECT(ldev), &scratchpad_ops, + ldev, TYPE_FSI_SCRATCHPAD, 0x400); +} + +static void fsi_scratchpad_reset(DeviceState *dev) +{ + FSIScratchPad *s = SCRATCHPAD(dev); + + memset(s->regs, 0, sizeof(s->regs)); +} + +static void fsi_scratchpad_class_init(ObjectClass *klass, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(klass); + + dc->bus_type = TYPE_FSI_LBUS; + dc->realize = fsi_scratchpad_realize; + dc->reset = fsi_scratchpad_reset; +} + +static const TypeInfo fsi_scratchpad_info = { + .name = TYPE_FSI_SCRATCHPAD, + .parent = TYPE_FSI_LBUS_DEVICE, + .instance_size = sizeof(FSIScratchPad), + .class_init = fsi_scratchpad_class_init, +}; + static void fsi_lbus_register_types(void) { type_register_static(&fsi_lbus_info); type_register_static(&fsi_lbus_device_type_info); + type_register_static(&fsi_scratchpad_info); } type_init(fsi_lbus_register_types); diff --git a/hw/fsi/trace-events b/hw/fsi/trace-events index e69de29..c5753e2 100644 --- a/hw/fsi/trace-events +++ b/hw/fsi/trace-events @@ -0,0 +1,2 @@ +fsi_scratchpad_read(uint64_t addr, uint32_t size) "@0x%" PRIx64 " size=%d" +fsi_scratchpad_write(uint64_t addr, uint32_t size, uint64_t data) "@0x%" PRIx64 " size=%d value=0x%"PRIx64 |