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Code Issues Releases Activity

Memory: Allow IsValidVirtualAddress to be called with a specific process parameter.

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There is still an overload of IsValidVirtualAddress that only takes the VAddr and will default to the current process.
This commit is contained in:
Subv 2017-09-26 17:27:44 -05:00
parent 0c20da7fde
commit 35da7f57ef
2 changed files with 25 additions and 7 deletions
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25
src/core/memory.cpp
View file

@ -110,8 +110,8 @@ static u8* GetPointerFromVMA(VAddr vaddr) {
/** /**
* This function should only be called for virtual addreses with attribute `PageType::Special`. * This function should only be called for virtual addreses with attribute `PageType::Special`.
*/ */
static MMIORegionPointer GetMMIOHandler(VAddr vaddr) { static MMIORegionPointer GetMMIOHandler(const PageTable& page_table, VAddr vaddr) {
for (const auto& region : current_page_table->special_regions) { for (const auto& region : page_table.special_regions) {
if (vaddr >= region.base && vaddr < (region.base + region.size)) { if (vaddr >= region.base && vaddr < (region.base + region.size)) {
return region.handler; return region.handler;
} }
@ -120,6 +120,11 @@ static MMIORegionPointer GetMMIOHandler(VAddr vaddr) {
return nullptr; // Should never happen return nullptr; // Should never happen
} }
static MMIORegionPointer GetMMIOHandler(VAddr vaddr) {
const PageTable& page_table = Kernel::g_current_process->vm_manager.page_table;
return GetMMIOHandler(page_table, vaddr);
}
template <typename T> template <typename T>
T ReadMMIO(MMIORegionPointer mmio_handler, VAddr addr); T ReadMMIO(MMIORegionPointer mmio_handler, VAddr addr);
@ -204,18 +209,20 @@ void Write(const VAddr vaddr, const T data) {
} }
} }
bool IsValidVirtualAddress(const VAddr vaddr) { bool IsValidVirtualAddress(const Kernel::Process& process, const VAddr vaddr) {
const u8* page_pointer = current_page_table->pointers[vaddr >> PAGE_BITS]; auto& page_table = process.vm_manager.page_table;
const u8* page_pointer = page_table.pointers[vaddr >> PAGE_BITS];
if (page_pointer) if (page_pointer)
return true; return true;
if (current_page_table->attributes[vaddr >> PAGE_BITS] == PageType::RasterizerCachedMemory) if (page_table.attributes[vaddr >> PAGE_BITS] == PageType::RasterizerCachedMemory)
return true; return true;
if (current_page_table->attributes[vaddr >> PAGE_BITS] != PageType::Special) if (page_table.attributes[vaddr >> PAGE_BITS] != PageType::Special)
return false; return false;
MMIORegionPointer mmio_region = GetMMIOHandler(vaddr); MMIORegionPointer mmio_region = GetMMIOHandler(page_table, vaddr);
if (mmio_region) { if (mmio_region) {
return mmio_region->IsValidAddress(vaddr); return mmio_region->IsValidAddress(vaddr);
} }
@ -223,6 +230,10 @@ bool IsValidVirtualAddress(const VAddr vaddr) {
return false; return false;
} }
bool IsValidVirtualAddress(const VAddr vaddr) {
return IsValidVirtualAddress(*Kernel::g_current_process, vaddr);
}
bool IsValidPhysicalAddress(const PAddr paddr) { bool IsValidPhysicalAddress(const PAddr paddr) {
return GetPhysicalPointer(paddr) != nullptr; return GetPhysicalPointer(paddr) != nullptr;
} }

7
src/core/memory.h
View file

@ -12,6 +12,10 @@
#include "common/common_types.h" #include "common/common_types.h"
#include "core/mmio.h" #include "core/mmio.h"
namespace Kernel {
class Process;
}
namespace Memory { namespace Memory {
/** /**
@ -185,7 +189,10 @@ enum : VAddr {
void SetCurrentPageTable(PageTable* page_table); void SetCurrentPageTable(PageTable* page_table);
PageTable* GetCurrentPageTable(); PageTable* GetCurrentPageTable();
/// Determines if the given VAddr is valid for the specified process.
bool IsValidVirtualAddress(const Kernel::Process& process, const VAddr vaddr);
bool IsValidVirtualAddress(const VAddr addr); bool IsValidVirtualAddress(const VAddr addr);
bool IsValidPhysicalAddress(const PAddr addr); bool IsValidPhysicalAddress(const PAddr addr);
u8 Read8(VAddr addr); u8 Read8(VAddr addr);