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vm_manager: Add backing functionality for memory attributes

Adds the barebones enumeration constants and functions in place to
handle memory attributes, while also essentially leaving the attribute
itself non-functional.
This commit is contained in:
Lioncash 2018-12-14 18:19:12 -05:00
parent 2f2fc47af2
commit 34b24a47e9
2 changed files with 85 additions and 1 deletions

View file

@ -38,7 +38,7 @@ static const char* GetMemoryStateName(MemoryState state) {
bool VirtualMemoryArea::CanBeMergedWith(const VirtualMemoryArea& next) const {
ASSERT(base + size == next.base);
if (permissions != next.permissions || meminfo_state != next.meminfo_state ||
type != next.type) {
attribute != next.attribute || type != next.type) {
return false;
}
if (type == VMAType::AllocatedMemoryBlock &&
@ -308,6 +308,7 @@ MemoryInfo VMManager::QueryMemory(VAddr address) const {
if (IsValidHandle(vma)) {
memory_info.base_address = vma->second.base;
memory_info.attributes = ToSvcMemoryAttribute(vma->second.attribute);
memory_info.permission = static_cast<u32>(vma->second.permissions);
memory_info.size = vma->second.size;
memory_info.state = ToSvcMemoryState(vma->second.meminfo_state);

View file

@ -43,6 +43,88 @@ enum class VMAPermission : u8 {
ReadWriteExecute = Read | Write | Execute,
};
constexpr VMAPermission operator|(VMAPermission lhs, VMAPermission rhs) {
return static_cast<VMAPermission>(u32(lhs) | u32(rhs));
}
constexpr VMAPermission operator&(VMAPermission lhs, VMAPermission rhs) {
return static_cast<VMAPermission>(u32(lhs) & u32(rhs));
}
constexpr VMAPermission operator^(VMAPermission lhs, VMAPermission rhs) {
return static_cast<VMAPermission>(u32(lhs) ^ u32(rhs));
}
constexpr VMAPermission operator~(VMAPermission permission) {
return static_cast<VMAPermission>(~u32(permission));
}
constexpr VMAPermission& operator|=(VMAPermission& lhs, VMAPermission rhs) {
lhs = lhs | rhs;
return lhs;
}
constexpr VMAPermission& operator&=(VMAPermission& lhs, VMAPermission rhs) {
lhs = lhs & rhs;
return lhs;
}
constexpr VMAPermission& operator^=(VMAPermission& lhs, VMAPermission rhs) {
lhs = lhs ^ rhs;
return lhs;
}
/// Attribute flags that can be applied to a VMA
enum class MemoryAttribute : u32 {
Mask = 0xFF,
/// No particular qualities
None = 0,
/// Memory locked/borrowed for use. e.g. This would be used by transfer memory.
Locked = 1,
/// Memory locked for use by IPC-related internals.
LockedForIPC = 2,
/// Mapped as part of the device address space.
DeviceMapped = 4,
/// Uncached memory
Uncached = 8,
};
constexpr MemoryAttribute operator|(MemoryAttribute lhs, MemoryAttribute rhs) {
return static_cast<MemoryAttribute>(u32(lhs) | u32(rhs));
}
constexpr MemoryAttribute operator&(MemoryAttribute lhs, MemoryAttribute rhs) {
return static_cast<MemoryAttribute>(u32(lhs) & u32(rhs));
}
constexpr MemoryAttribute operator^(MemoryAttribute lhs, MemoryAttribute rhs) {
return static_cast<MemoryAttribute>(u32(lhs) ^ u32(rhs));
}
constexpr MemoryAttribute operator~(MemoryAttribute attribute) {
return static_cast<MemoryAttribute>(~u32(attribute));
}
constexpr MemoryAttribute& operator|=(MemoryAttribute& lhs, MemoryAttribute rhs) {
lhs = lhs | rhs;
return lhs;
}
constexpr MemoryAttribute& operator&=(MemoryAttribute& lhs, MemoryAttribute rhs) {
lhs = lhs & rhs;
return lhs;
}
constexpr MemoryAttribute& operator^=(MemoryAttribute& lhs, MemoryAttribute rhs) {
lhs = lhs ^ rhs;
return lhs;
}
constexpr u32 ToSvcMemoryAttribute(MemoryAttribute attribute) {
return static_cast<u32>(attribute & MemoryAttribute::Mask);
}
// clang-format off
/// Represents memory states and any relevant flags, as used by the kernel.
/// svcQueryMemory interprets these by masking away all but the first eight
@ -183,6 +265,7 @@ struct VirtualMemoryArea {
VMAPermission permissions = VMAPermission::None;
/// Tag returned by svcQueryMemory. Not otherwise used.
MemoryState meminfo_state = MemoryState::Unmapped;
MemoryAttribute attribute = MemoryAttribute::None;
// Settings for type = AllocatedMemoryBlock
/// Memory block backing this VMA.