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Diffstat (limited to 'src/core/mem_map_funcs.cpp')
-rw-r--r--src/core/mem_map_funcs.cpp144
1 files changed, 48 insertions, 96 deletions
diff --git a/src/core/mem_map_funcs.cpp b/src/core/mem_map_funcs.cpp
index 3e85a119..bb83855f 100644
--- a/src/core/mem_map_funcs.cpp
+++ b/src/core/mem_map_funcs.cpp
@@ -10,154 +10,106 @@
namespace Memory {
+/// Convert a physical address to virtual address
+u32 _AddressPhysicalToVirtual(const u32 addr) {
+ // Our memory interface read/write functions assume virtual addresses. Put any physical address
+ // to virtual address translations here. This is obviously quite hacky... But we're not doing
+ // any MMU emulation yet or anything
+ if (((addr & 0xF0000000) == MEM_FCRAM_PADDR) && (addr < (MEM_FCRAM_PADDR_END))) {
+ return (addr & MEM_FCRAM_MASK) | MEM_FCRAM_VADDR;
+ }
+ return addr;
+}
+
template <typename T>
inline void _Read(T &var, const u32 addr) {
// TODO: Figure out the fastest order of tests for both read and write (they are probably different).
// TODO: Make sure this represents the mirrors in a correct way.
// Could just do a base-relative read, too.... TODO
+ const u32 vaddr = _AddressPhysicalToVirtual(addr);
// Memory allocated for HLE use that can be addressed from the emulated application
// The primary use of this is sharing a commandbuffer between the HLE OS (syscore) and the LLE
// core running the user application (appcore)
- if (addr >= HLE::CMD_BUFFER_ADDR && addr < HLE::CMD_BUFFER_ADDR_END) {
- HLE::Read<T>(var, addr);
+ if (vaddr >= HLE::CMD_BUFFER_ADDR && vaddr < HLE::CMD_BUFFER_ADDR_END) {
+ HLE::Read<T>(var, vaddr);
// Hardware I/O register reads
// 0x10XXXXXX- is physical address space, 0x1EXXXXXX is virtual address space
- } else if ((addr & 0xFF000000) == 0x10000000 || (addr & 0xFF000000) == 0x1E000000) {
- HW::Read<T>(var, addr);
-
- // FCRAM virtual address reads
- } else if ((addr & 0x3E000000) == 0x08000000) {
- var = *((const T*)&g_fcram[addr & MEM_FCRAM_MASK]);
-
- // Scratchpad memory
- } else if (addr > MEM_SCRATCHPAD_VADDR && addr <= (MEM_SCRATCHPAD_VADDR + MEM_SCRATCHPAD_SIZE)) {
- var = *((const T*)&g_scratchpad[addr & MEM_SCRATCHPAD_MASK]);
-
- /*else if ((addr & 0x3F800000) == 0x04000000) {
- var = *((const T*)&m_pVRAM[addr & VRAM_MASK]);
- }*/
-
- // HACK(bunnei): There is no layer yet to translate virtual addresses to physical addresses.
- // Until we progress far enough along, we'll accept all physical address reads here. I think
- // that this is typically a corner-case from usermode software unless they are trying to do
- // bare-metal things (e.g. early 3DS homebrew writes directly to the FB @ 0x20184E60, etc.
- } else if (((addr & 0xF0000000) == MEM_FCRAM_PADDR) && (addr < (MEM_FCRAM_PADDR_END))) {
- var = *((const T*)&g_fcram[addr & MEM_FCRAM_MASK]);
+ } else if ((vaddr & 0xFF000000) == 0x10000000 || (vaddr & 0xFF000000) == 0x1E000000) {
+ HW::Read<T>(var, vaddr);
+
+ // FCRAM
+ } else if ((vaddr > MEM_FCRAM_VADDR) && (vaddr < MEM_FCRAM_VADDR_END)) {
+ var = *((const T*)&g_fcram[vaddr & MEM_FCRAM_MASK]);
+
+ /*else if ((vaddr & 0x3F800000) == 0x04000000) {
+ var = *((const T*)&m_pVRAM[vaddr & VRAM_MASK]);*/
} else {
- _assert_msg_(MEMMAP, false, "unknown Read%d @ 0x%08X", sizeof(var) * 8, addr);
+ _assert_msg_(MEMMAP, false, "unknown Read%d @ 0x%08X", sizeof(var) * 8, vaddr);
}
}
template <typename T>
inline void _Write(u32 addr, const T data) {
+ u32 vaddr = _AddressPhysicalToVirtual(addr);
// Memory allocated for HLE use that can be addressed from the emulated application
// The primary use of this is sharing a commandbuffer between the HLE OS (syscore) and the LLE
// core running the user application (appcore)
- if (addr >= HLE::CMD_BUFFER_ADDR && addr < HLE::CMD_BUFFER_ADDR_END) {
- HLE::Write<T>(addr, data);
+ if (vaddr >= HLE::CMD_BUFFER_ADDR && vaddr < HLE::CMD_BUFFER_ADDR_END) {
+ HLE::Write<T>(vaddr, data);
// Hardware I/O register writes
// 0x10XXXXXX- is physical address space, 0x1EXXXXXX is virtual address space
- } else if ((addr & 0xFF000000) == 0x10000000 || (addr & 0xFF000000) == 0x1E000000) {
- HW::Write<T>(addr, data);
+ } else if ((vaddr & 0xFF000000) == 0x10000000 || (vaddr & 0xFF000000) == 0x1E000000) {
+ HW::Write<T>(vaddr, data);
// ExeFS:/.code is loaded here:
- } else if ((addr & 0xFFF00000) == 0x00100000) {
+ } else if ((vaddr & 0xFFF00000) == 0x00100000) {
// TODO(ShizZy): This is dumb... handle correctly. From 3DBrew:
// http://3dbrew.org/wiki/Memory_layout#ARM11_User-land_memory_regions
// The ExeFS:/.code is loaded here, executables must be loaded to the 0x00100000 region when
// the exheader "special memory" flag is clear. The 0x03F00000-byte size restriction only
// applies when this flag is clear. Executables are usually loaded to 0x14000000 when the
// exheader "special memory" flag is set, however this address can be arbitrary.
- *(T*)&g_fcram[addr & MEM_FCRAM_MASK] = data;
-
- // Scratchpad memory
- } else if (addr > MEM_SCRATCHPAD_VADDR && addr <= (MEM_SCRATCHPAD_VADDR + MEM_SCRATCHPAD_SIZE)) {
- *(T*)&g_scratchpad[addr & MEM_SCRATCHPAD_MASK] = data;
+ *(T*)&g_fcram[vaddr & MEM_FCRAM_MASK] = data;
- // Heap mapped by ControlMemory:
- } else if ((addr & 0x3E000000) == 0x08000000) {
- // TODO(ShizZy): Writes to this virtual address should be put in physical memory at FCRAM + GSP
- // heap size... the following is writing to FCRAM + 0, which is actually supposed to be the
- // application's GSP heap
- *(T*)&g_fcram[addr & MEM_FCRAM_MASK] = data;
+ // FCRAM
+ } else if ((vaddr > MEM_FCRAM_VADDR) && (vaddr < MEM_FCRAM_VADDR_END)) {
+ *(T*)&g_fcram[vaddr & MEM_FCRAM_MASK] = data;
- } else if ((addr & 0xFF000000) == 0x14000000) {
+ } else if ((vaddr & 0xFF000000) == 0x14000000) {
_assert_msg_(MEMMAP, false, "umimplemented write to GSP heap");
- } else if ((addr & 0xFFF00000) == 0x1EC00000) {
+ } else if ((vaddr & 0xFFF00000) == 0x1EC00000) {
_assert_msg_(MEMMAP, false, "umimplemented write to IO registers");
- } else if ((addr & 0xFF000000) == 0x1F000000) {
+ } else if ((vaddr & 0xFF000000) == 0x1F000000) {
_assert_msg_(MEMMAP, false, "umimplemented write to VRAM");
- } else if ((addr & 0xFFF00000) == 0x1FF00000) {
+ } else if ((vaddr & 0xFFF00000) == 0x1FF00000) {
_assert_msg_(MEMMAP, false, "umimplemented write to DSP memory");
- } else if ((addr & 0xFFFF0000) == 0x1FF80000) {
+ } else if ((vaddr & 0xFFFF0000) == 0x1FF80000) {
_assert_msg_(MEMMAP, false, "umimplemented write to Configuration Memory");
- } else if ((addr & 0xFFFFF000) == 0x1FF81000) {
+ } else if ((vaddr & 0xFFFFF000) == 0x1FF81000) {
_assert_msg_(MEMMAP, false, "umimplemented write to shared page");
- // HACK(bunnei): There is no layer yet to translate virtual addresses to physical addresses.
- // Until we progress far enough along, we'll accept all physical address writes here. I think
- // that this is typically a corner-case from usermode software unless they are trying to do
- // bare-metal things (e.g. early 3DS homebrew writes directly to the FB @ 0x20184E60, etc.
- } else if (((addr & 0xF0000000) == MEM_FCRAM_PADDR) && (addr < (MEM_FCRAM_PADDR_END))) {
- *(T*)&g_fcram[addr & MEM_FCRAM_MASK] = data;
-
// Error out...
} else {
_assert_msg_(MEMMAP, false, "unknown Write%d 0x%08X @ 0x%08X", sizeof(data) * 8,
- data, addr);
- }
-}
-
-bool IsValidAddress(const u32 addr) {
- if ((addr & 0x3E000000) == 0x08000000) {
- return true;
- } else if ((addr & 0x3F800000) == 0x04000000) {
- return true;
- } else if ((addr & 0xBFFF0000) == 0x00010000) {
- return true;
- } else if ((addr & 0x3F000000) >= 0x08000000 && (addr & 0x3F000000) < 0x08000000 + MEM_FCRAM_MASK) {
- return true;
- } else {
- return false;
+ data, vaddr);
}
}
u8 *GetPointer(const u32 addr) {
- // TODO(bunnei): Just a stub for now... ImplementMe!
- if ((addr & 0x3E000000) == 0x08000000) {
- return g_fcram + (addr & MEM_FCRAM_MASK);
-
- // HACK(bunnei): There is no layer yet to translate virtual addresses to physical addresses.
- // Until we progress far enough along, we'll accept all physical address reads here. I think
- // that this is typically a corner-case from usermode software unless they are trying to do
- // bare-metal things (e.g. early 3DS homebrew writes directly to the FB @ 0x20184E60, etc.
- } else if (((addr & 0xF0000000) == MEM_FCRAM_PADDR) && (addr < (MEM_FCRAM_PADDR_END))) {
- return g_fcram + (addr & MEM_FCRAM_MASK);
-
- //else if ((addr & 0x3F800000) == 0x04000000) {
- // return g_vram + (addr & MEM_VRAM_MASK);
- //}
- //else if ((addr & 0x3F000000) >= 0x08000000 && (addr & 0x3F000000) < 0x08000000 + g_MemorySize) {
- // return m_pRAM + (addr & g_MemoryMask);
- //}
+ const u32 vaddr = _AddressPhysicalToVirtual(addr);
+
+ // FCRAM
+ if ((vaddr > MEM_FCRAM_VADDR) && (vaddr < MEM_FCRAM_VADDR_END)) {
+ return g_fcram + (vaddr & MEM_FCRAM_MASK);
+
} else {
- //ERROR_LOG(MEMMAP, "Unknown GetPointer %08x PC %08x LR %08x", addr, currentMIPS->pc, currentMIPS->r[MIPS_REG_RA]);
- ERROR_LOG(MEMMAP, "Unknown GetPointer %08x", addr);
- static bool reported = false;
- //if (!reported) {
- // Reporting::ReportMessage("Unknown GetPointer %08x PC %08x LR %08x", addr, currentMIPS->pc, currentMIPS->r[MIPS_REG_RA]);
- // reported = true;
- //}
- //if (!g_Config.bIgnoreBadMemAccess) {
- // Core_EnableStepping(true);
- // host->SetDebugMode(true);
- //}
+ ERROR_LOG(MEMMAP, "Unknown GetPointer @ 0x%08x", vaddr);
return 0;
}
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-05 05:23:17 +0000