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[Zion] Add an argument to memory align a mapping.

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This commit is contained in:
Drew Galbraith 2023-11-23 18:49:01 -08:00
parent c8931a01c8
commit d44be91099
11 changed files with 30 additions and 22 deletions
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12
zion/object/address_space.cpp
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@ -26,11 +26,17 @@ void AddressSpace::FreeUserStack(uint64_t rsp) {
return user_stacks_.FreeUserStack(rsp);
}
uint64_t AddressSpace::GetNextMemMapAddr(uint64_t size) {
uint64_t AddressSpace::GetNextMemMapAddr(uint64_t size, uint64_t align) {
if (size == 0) {
panic("Zero size memmap");
}
size = ((size - 1) & ~0xFFF) + 0x1000;
// FIXME: We need to validate that align is a power of 2;
if (align > 0) {
while ((next_memmap_addr_ & (align - 1)) != 0) {
next_memmap_addr_ += kPageSize;
}
}
uint64_t addr = next_memmap_addr_;
next_memmap_addr_ += size;
if (next_memmap_addr_ >= 0x30'00000000) {
@ -45,8 +51,8 @@ glcr::ErrorCode AddressSpace::MapInMemoryObject(
}
glcr::ErrorOr<uint64_t> AddressSpace::MapInMemoryObject(
const glcr::RefPtr<MemoryObject>& mem_obj) {
uint64_t vaddr = GetNextMemMapAddr(mem_obj->size());
const glcr::RefPtr<MemoryObject>& mem_obj, uint64_t align) {
uint64_t vaddr = GetNextMemMapAddr(mem_obj->size(), align);
RET_ERR(mapping_tree_.AddInMemoryObject(vaddr, mem_obj));
return vaddr;
}

4
zion/object/address_space.h
View file

@ -67,7 +67,7 @@ class AddressSpace : public KernelObject {
// User Mappings.
uint64_t AllocateUserStack();
void FreeUserStack(uint64_t);
uint64_t GetNextMemMapAddr(uint64_t size);
uint64_t GetNextMemMapAddr(uint64_t size, uint64_t align);
// Maps in a memory object at a specific address.
// Note this is unsafe for now as it may clobber other mappings.
@ -75,7 +75,7 @@ class AddressSpace : public KernelObject {
uint64_t vaddr, const glcr::RefPtr<MemoryObject>& mem_obj);
[[nodiscard]] glcr::ErrorOr<uint64_t> MapInMemoryObject(
const glcr::RefPtr<MemoryObject>& mem_obj);
const glcr::RefPtr<MemoryObject>& mem_obj, uint64_t align);
[[nodiscard]] glcr::ErrorCode FreeAddressRange(uint64_t vaddr_base,
uint64_t vaddr_limit) {