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kern: add toggleable support for 40-bit physaddr caps

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This commit is contained in:
Michael Scire 2021-10-22 09:33:53 -07:00 • committed by SciresM
parent d8a2b47b0a
commit 2a842791eb
3 changed files with 28 additions and 5 deletions
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10
libraries/libmesosphere/source/kern_k_capabilities.cpp
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@ -117,11 +117,15 @@ namespace ams::kern {
}
Result KCapabilities::MapRange(const util::BitPack32 cap, const util::BitPack32 size_cap, KProcessPageTable *page_table) {
/* Get/validate address/size */
#if defined(MESOSPHERE_ENABLE_LARGE_PHYSICAL_ADDRESS_CAPABILITIES)
const u64 phys_addr = static_cast<u64>(cap.Get<MapRange::Address>() | (size_cap.Get<MapRangeSize::AddressHigh>() << MapRange::Address::Count)) * PageSize;
#else
const u64 phys_addr = static_cast<u64>(cap.Get<MapRange::Address>()) * PageSize;
/* Validate reserved bits are unused. */
R_UNLESS(size_cap.Get<MapRangeSize::Reserved>() == 0, svc::ResultOutOfRange());
/* Get/validate address/size */
const u64 phys_addr = cap.Get<MapRange::Address>() * PageSize;
#endif
const size_t num_pages = size_cap.Get<MapRangeSize::Pages>();
const size_t size = num_pages * PageSize;
R_UNLESS(phys_addr == GetInteger(KPhysicalAddress(phys_addr)), svc::ResultInvalidAddress());