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sun4m: implement IOMMU translation using IOMMU memory region 

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
This commit is contained in:
Mark Cave-Ayland 2017-10-27 13:09:03 +01:00
parent 331b7fc156
commit 8413846631
2 changed files with 67 additions and 0 deletions
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62
hw/dma/sun4m_iommu.c
View File

@ -278,6 +278,49 @@ static void iommu_bad_addr(IOMMUState *s, hwaddr addr,
qemu_irq_raise(s->irq);
}
/* Called from RCU critical section */
static IOMMUTLBEntry sun4m_translate_iommu(IOMMUMemoryRegion *iommu,
hwaddr addr,
IOMMUAccessFlags flags)
{
IOMMUState *is = container_of(iommu, IOMMUState, iommu);
hwaddr page, pa;
int is_write = (flags & IOMMU_WO) ? 1 : 0;
uint32_t pte;
IOMMUTLBEntry ret = {
.target_as = &address_space_memory,
.iova = 0,
.translated_addr = 0,
.addr_mask = ~(hwaddr)0,
.perm = IOMMU_NONE,
};
page = addr & IOMMU_PAGE_MASK;
pte = iommu_page_get_flags(is, page);
if (!(pte & IOPTE_VALID)) {
iommu_bad_addr(is, page, is_write);
return ret;
}
pa = iommu_translate_pa(addr, pte);
if (is_write && !(pte & IOPTE_WRITE)) {
iommu_bad_addr(is, page, is_write);
return ret;
}
if (pte & IOPTE_WRITE) {
ret.perm = IOMMU_RW;
} else {
ret.perm = IOMMU_RO;
}
ret.iova = page;
ret.translated_addr = pa;
ret.addr_mask = ~IOMMU_PAGE_MASK;
return ret;
}
void sparc_iommu_memory_rw(void *opaque, hwaddr addr,
uint8_t *buf, int len, int is_write)
{
@ -340,6 +383,11 @@ static void iommu_init(Object *obj)
IOMMUState *s = SUN4M_IOMMU(obj);
SysBusDevice *dev = SYS_BUS_DEVICE(obj);
memory_region_init_iommu(&s->iommu, sizeof(s->iommu),
TYPE_SUN4M_IOMMU_MEMORY_REGION, OBJECT(dev),
"iommu-sun4m", UINT64_MAX);
address_space_init(&s->iommu_as, MEMORY_REGION(&s->iommu), "iommu-as");
sysbus_init_irq(dev, &s->irq);
memory_region_init_io(&s->iomem, obj, &iommu_mem_ops, s, "iommu",
@ -369,9 +417,23 @@ static const TypeInfo iommu_info = {
.class_init = iommu_class_init,
};
static void sun4m_iommu_memory_region_class_init(ObjectClass *klass, void *data)
{
IOMMUMemoryRegionClass *imrc = IOMMU_MEMORY_REGION_CLASS(klass);
imrc->translate = sun4m_translate_iommu;
}
static const TypeInfo sun4m_iommu_memory_region_info = {
.parent = TYPE_IOMMU_MEMORY_REGION,
.name = TYPE_SUN4M_IOMMU_MEMORY_REGION,
.class_init = sun4m_iommu_memory_region_class_init,
};
static void iommu_register_types(void)
{
type_register_static(&iommu_info);
type_register_static(&sun4m_iommu_memory_region_info);
}
type_init(iommu_register_types)

5
include/hw/sparc/sun4m.h
View File

@ -12,11 +12,16 @@
#define TYPE_SUN4M_IOMMU "iommu"
#define SUN4M_IOMMU(obj) OBJECT_CHECK(IOMMUState, (obj), TYPE_SUN4M_IOMMU)
#define TYPE_SUN4M_IOMMU_MEMORY_REGION "sun4m-iommu-memory-region"
#define IOMMU_NREGS (4 * 4096 / 4)
typedef struct IOMMUState {
SysBusDevice parent_obj;
AddressSpace iommu_as;
IOMMUMemoryRegion iommu;
MemoryRegion iomem;
uint32_t regs[IOMMU_NREGS];
hwaddr iostart;