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kern: implement DetachDeviceAddressSpace, skeleton other das funcs in KDevicePageTable

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Michael Scire 2020-07-14 19:15:10 -07:00 committed by SciresM
parent 0d3aa13f70
commit 2ca6772475
2 changed files with 95 additions and 2 deletions
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9
libraries/libmesosphere/include/mesosphere/board/nintendo/nx/kern_k_device_page_table.hpp
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@ -61,6 +61,15 @@ namespace ams::kern::board::nintendo::nx {
Result Map(size_t *out_mapped_size, const KPageGroup &pg, KDeviceVirtualAddress device_address, ams::svc::MemoryPermission device_perm, bool refresh_mappings);
Result Unmap(const KPageGroup &pg, KDeviceVirtualAddress device_address);
private:
Result MapDevicePage(size_t *out_mapped_size, s32 *out_num_pt, s32 max_pt, KPhysicalAddress phys_addr, u64 size, KDeviceVirtualAddress address, ams::svc::MemoryPermission device_perm);
Result MapImpl(size_t *out_mapped_size, s32 *out_num_pt, s32 max_pt, const KPageGroup &pg, KDeviceVirtualAddress device_address, ams::svc::MemoryPermission device_perm);
void UnmapImpl(KDeviceVirtualAddress address, u64 size, bool force);
bool IsFree(KDeviceVirtualAddress address, u64 size) const;
Result MakePageGroup(KPageGroup *out, KDeviceVirtualAddress address, u64 size) const;
bool Compare(const KPageGroup &pg, KDeviceVirtualAddress device_address) const;
public:
static void Initialize();
};

88
libraries/libmesosphere/source/board/nintendo/nx/kern_k_device_page_table.cpp
View file

@ -580,15 +580,99 @@ namespace ams::kern::board::nintendo::nx {
}
Result KDevicePageTable::Detach(ams::svc::DeviceName device_name) {
/* Validate the device name. */
R_UNLESS(0 <= device_name, svc::ResultNotFound());
R_UNLESS(device_name < ams::svc::DeviceName_Count, svc::ResultNotFound());
/* Check that the device is already attached. */
R_UNLESS((this->attached_device & (1ul << device_name)) != 0, svc::ResultInvalidState());
/* Get the device asid register offset. */
const int reg_offset = GetDeviceAsidRegisterOffset(device_name);
R_UNLESS(reg_offset >= 0, svc::ResultNotFound());
/* Determine the old/new values. */
const u32 old_val = IsHsSupported(device_name) ? this->hs_attached_value : this->attached_value;
const u32 new_val = IsHsSupported(device_name) ? this->hs_detached_value : this->detached_value;
/* When not building for debug, the old value might be unused. */
AMS_UNUSED(old_val);
/* Detach the device. */
{
KScopedLightLock lk(g_lock);
/* Check that the device is attached. */
MESOSPHERE_ASSERT(ReadMcRegister(reg_offset) == old_val);
/* Release the device. */
WriteMcRegister(reg_offset, new_val);
SmmuSynchronizationBarrier();
/* Check that the device was released. */
MESOSPHERE_ASSERT((ReadMcRegister(reg_offset) | (1u << 31)) == (new_val | 1u << 31));
}
/* Mark the device as detached. */
this->attached_device &= ~(1ul << device_name);
return ResultSuccess();
}
Result KDevicePageTable::MapDevicePage(size_t *out_mapped_size, s32 *out_num_pt, s32 max_pt, KPhysicalAddress phys_addr, u64 size, KDeviceVirtualAddress address, ams::svc::MemoryPermission device_perm) {
MESOSPHERE_UNIMPLEMENTED();
}
Result KDevicePageTable::MapImpl(size_t *out_mapped_size, s32 *out_num_pt, s32 max_pt, const KPageGroup &pg, KDeviceVirtualAddress device_address, ams::svc::MemoryPermission device_perm) {
MESOSPHERE_UNIMPLEMENTED();
}
void KDevicePageTable::UnmapImpl(KDeviceVirtualAddress address, u64 size, bool force) {
MESOSPHERE_UNIMPLEMENTED();
}
bool KDevicePageTable::IsFree(KDeviceVirtualAddress address, u64 size) const {
MESOSPHERE_UNIMPLEMENTED();
}
Result KDevicePageTable::MakePageGroup(KPageGroup *out, KDeviceVirtualAddress address, u64 size) const {
MESOSPHERE_UNIMPLEMENTED();
}
bool KDevicePageTable::Compare(const KPageGroup &compare_pg, KDeviceVirtualAddress device_address) const {
bool same_pages = false;
/* Make a page group. */
KPageGroup calc_pg(std::addressof(Kernel::GetBlockInfoManager()));
if (R_SUCCEEDED(this->MakePageGroup(std::addressof(calc_pg), device_address, compare_pg.GetNumPages() * PageSize))) {
same_pages = calc_pg.IsEquivalentTo(compare_pg);
}
return same_pages;
}
Result KDevicePageTable::Map(size_t *out_mapped_size, const KPageGroup &pg, KDeviceVirtualAddress device_address, ams::svc::MemoryPermission device_perm, bool refresh_mappings) {
MESOSPHERE_UNIMPLEMENTED();
/* Clear the output size. */
*out_mapped_size = 0;
/* Map the pages. */
s32 num_pt = 0;
return this->MapImpl(out_mapped_size, std::addressof(num_pt), refresh_mappings ? 1 : std::numeric_limits<s32>::max(), pg, device_address, device_perm);
}
Result KDevicePageTable::Unmap(const KPageGroup &pg, KDeviceVirtualAddress device_address) {
MESOSPHERE_UNIMPLEMENTED();
/* Validate address/size. */
const size_t size = pg.GetNumPages() * PageSize;
MESOSPHERE_ASSERT((device_address & ~DeviceVirtualAddressMask) == 0);
MESOSPHERE_ASSERT(((device_address + size - 1) & ~DeviceVirtualAddressMask) == 0);
/* Ensure the page group is correct. */
R_UNLESS(this->Compare(pg, device_address), svc::ResultInvalidCurrentMemory());
/* Unmap the pages. */
this->UnmapImpl(device_address, size, false);
return ResultSuccess();
}
}