MemMap: Updated memory map to subtract base address instead of mask.

- More readable, a little less error prone.

Conflicts:
	src/core/mem_map.h
	src/core/mem_map_funcs.cpp

2 files changed, 21 insertions, 31 deletions

diff --git a/src/core/mem_map.h b/src/core/mem_map.h
index a58c59244..2e2c0bdf7 100644
--- a/src/core/mem_map.h
+++ b/src/core/mem_map.h
@@ -27,47 +27,39 @@ enum {
     FCRAM_PADDR_END         = (FCRAM_PADDR + FCRAM_SIZE),       ///< FCRAM end of physical space
     FCRAM_VADDR             = 0x08000000,                       ///< FCRAM virtual address
     FCRAM_VADDR_END         = (FCRAM_VADDR + FCRAM_SIZE),       ///< FCRAM end of virtual space
-    FCRAM_MASK              = (FCRAM_SIZE - 1),                 ///< FCRAM mask
 
     SHARED_MEMORY_SIZE      = 0x04000000,   ///< Shared memory size
     SHARED_MEMORY_VADDR     = 0x10000000,   ///< Shared memory
     SHARED_MEMORY_VADDR_END = (SHARED_MEMORY_VADDR + SHARED_MEMORY_SIZE),
-    SHARED_MEMORY_MASK      = (SHARED_MEMORY_SIZE - 1),
 
     CONFIG_MEMORY_SIZE      = 0x00001000,   ///< Configuration memory size
     CONFIG_MEMORY_VADDR     = 0x1FF80000,   ///< Configuration memory virtual address
     CONFIG_MEMORY_VADDR_END = (CONFIG_MEMORY_VADDR + CONFIG_MEMORY_SIZE),
-    CONFIG_MEMORY_MASK      = (CONFIG_MEMORY_SIZE - 1),
 
     KERNEL_MEMORY_SIZE      = 0x00001000,   ///< Kernel memory size
     KERNEL_MEMORY_VADDR     = 0xFFFF0000,   ///< Kernel memory where the kthread objects etc are
     KERNEL_MEMORY_VADDR_END = (KERNEL_MEMORY_VADDR + KERNEL_MEMORY_SIZE),
-    KERNEL_MEMORY_MASK      = (KERNEL_MEMORY_SIZE - 1),
 
     EXEFS_CODE_SIZE         = 0x03F00000,
     EXEFS_CODE_VADDR        = 0x00100000,   ///< ExeFS:/.code is loaded here
     EXEFS_CODE_VADDR_END    = (EXEFS_CODE_VADDR + EXEFS_CODE_SIZE),
-    EXEFS_CODE_MASK         = 0x03FFFFFF,
 
     // Region of FCRAM used by system
     SYSTEM_MEMORY_SIZE      = 0x02C00000,   ///< 44MB
     SYSTEM_MEMORY_VADDR     = 0x04000000,
     SYSTEM_MEMORY_VADDR_END = (SYSTEM_MEMORY_VADDR + SYSTEM_MEMORY_SIZE),
-    SYSTEM_MEMORY_MASK      = 0x03FFFFFF,
 
     HEAP_SIZE               = FCRAM_SIZE,   ///< Application heap size
     //HEAP_PADDR              = HEAP_GSP_SIZE,
     //HEAP_PADDR_END          = (HEAP_PADDR + HEAP_SIZE),
     HEAP_VADDR              = 0x08000000,
     HEAP_VADDR_END          = (HEAP_VADDR + HEAP_SIZE),
-    HEAP_MASK               = (HEAP_SIZE - 1),
 
     HEAP_GSP_SIZE           = 0x02000000,   ///< GSP heap size... TODO: Define correctly?
     HEAP_GSP_VADDR          = 0x14000000,
     HEAP_GSP_VADDR_END      = (HEAP_GSP_VADDR + HEAP_GSP_SIZE),
     HEAP_GSP_PADDR          = 0x00000000,
     HEAP_GSP_PADDR_END      = (HEAP_GSP_PADDR + HEAP_GSP_SIZE),
-    HEAP_GSP_MASK           = (HEAP_GSP_SIZE - 1),
 
     HARDWARE_IO_SIZE        = 0x01000000,
     HARDWARE_IO_PADDR       = 0x10000000,                       ///< IO physical address start
@@ -80,12 +72,10 @@ enum {
     VRAM_VADDR              = 0x1F000000,
     VRAM_PADDR_END          = (VRAM_PADDR + VRAM_SIZE),
     VRAM_VADDR_END          = (VRAM_VADDR + VRAM_SIZE),
-    VRAM_MASK               = 0x007FFFFF,
 
     SCRATCHPAD_SIZE         = 0x00004000,   ///< Typical stack size - TODO: Read from exheader
     SCRATCHPAD_VADDR_END    = 0x10000000,
     SCRATCHPAD_VADDR        = (SCRATCHPAD_VADDR_END - SCRATCHPAD_SIZE), ///< Stack space
-    SCRATCHPAD_MASK         = (SCRATCHPAD_SIZE - 1),            ///< Scratchpad memory mask
 };
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
diff --git a/src/core/mem_map_funcs.cpp b/src/core/mem_map_funcs.cpp
index e8747840c..1887bcedb 100644
--- a/src/core/mem_map_funcs.cpp
+++ b/src/core/mem_map_funcs.cpp
@@ -56,7 +56,7 @@ inline void Read(T &var, const VAddr vaddr) {
 
     // Kernel memory command buffer
     if (vaddr >= KERNEL_MEMORY_VADDR && vaddr < KERNEL_MEMORY_VADDR_END) {
-        var = *((const T*)&g_kernel_mem[vaddr & KERNEL_MEMORY_MASK]);
+        var = *((const T*)&g_kernel_mem[vaddr - KERNEL_MEMORY_VADDR]);
 
     // Hardware I/O register reads
     // 0x10XXXXXX- is physical address space, 0x1EXXXXXX is virtual address space
@@ -65,23 +65,23 @@ inline void Read(T &var, const VAddr vaddr) {
 
     // ExeFS:/.code is loaded here
     } else if ((vaddr >= EXEFS_CODE_VADDR)  && (vaddr < EXEFS_CODE_VADDR_END)) {
-        var = *((const T*)&g_exefs_code[vaddr & EXEFS_CODE_MASK]);
+        var = *((const T*)&g_exefs_code[vaddr - EXEFS_CODE_VADDR]);
 
     // FCRAM - GSP heap
     } else if ((vaddr >= HEAP_GSP_VADDR) && (vaddr < HEAP_GSP_VADDR_END)) {
-        var = *((const T*)&g_heap_gsp[vaddr & HEAP_GSP_MASK]);
+        var = *((const T*)&g_heap_gsp[vaddr - HEAP_GSP_VADDR]);
 
     // FCRAM - application heap
     } else if ((vaddr >= HEAP_VADDR)  && (vaddr < HEAP_VADDR_END)) {
-        var = *((const T*)&g_heap[vaddr & HEAP_MASK]);
+        var = *((const T*)&g_heap[vaddr - HEAP_VADDR]);
 
     // Shared memory
     } else if ((vaddr >= SHARED_MEMORY_VADDR)  && (vaddr < SHARED_MEMORY_VADDR_END)) {
-        var = *((const T*)&g_shared_mem[vaddr & SHARED_MEMORY_MASK]);
+        var = *((const T*)&g_shared_mem[vaddr - SHARED_MEMORY_VADDR]);
 
     // System memory
     } else if ((vaddr >= SYSTEM_MEMORY_VADDR)  && (vaddr < SYSTEM_MEMORY_VADDR_END)) {
-        var = *((const T*)&g_system_mem[vaddr & SYSTEM_MEMORY_MASK]);
+        var = *((const T*)&g_system_mem[vaddr - SYSTEM_MEMORY_VADDR]);
 
     // Config memory
     } else if ((vaddr >= CONFIG_MEMORY_VADDR)  && (vaddr < CONFIG_MEMORY_VADDR_END)) {
@@ -89,7 +89,7 @@ inline void Read(T &var, const VAddr vaddr) {
 
     // VRAM
     } else if ((vaddr >= VRAM_VADDR)  && (vaddr < VRAM_VADDR_END)) {
-        var = *((const T*)&g_vram[vaddr & VRAM_MASK]);
+        var = *((const T*)&g_vram[vaddr - VRAM_VADDR]);
 
     } else {
         ERROR_LOG(MEMMAP, "unknown Read%lu @ 0x%08X", sizeof(var) * 8, vaddr);
@@ -101,7 +101,7 @@ inline void Write(const VAddr vaddr, const T data) {
 
     // Kernel memory command buffer
     if (vaddr >= KERNEL_MEMORY_VADDR && vaddr < KERNEL_MEMORY_VADDR_END) {
-        *(T*)&g_kernel_mem[vaddr & KERNEL_MEMORY_MASK] = data;
+        *(T*)&g_kernel_mem[vaddr - KERNEL_MEMORY_VADDR] = data;
 
     // Hardware I/O register writes
     // 0x10XXXXXX- is physical address space, 0x1EXXXXXX is virtual address space
@@ -110,27 +110,27 @@ inline void Write(const VAddr vaddr, const T data) {
 
     // ExeFS:/.code is loaded here
     } else if ((vaddr >= EXEFS_CODE_VADDR)  && (vaddr < EXEFS_CODE_VADDR_END)) {
-        *(T*)&g_exefs_code[vaddr & EXEFS_CODE_MASK] = data;
+        *(T*)&g_exefs_code[vaddr - EXEFS_CODE_VADDR] = data;
 
     // FCRAM - GSP heap
     } else if ((vaddr >= HEAP_GSP_VADDR)  && (vaddr < HEAP_GSP_VADDR_END)) {
-        *(T*)&g_heap_gsp[vaddr & HEAP_GSP_MASK] = data;
+        *(T*)&g_heap_gsp[vaddr - HEAP_GSP_VADDR] = data;
 
     // FCRAM - application heap
     } else if ((vaddr >= HEAP_VADDR)  && (vaddr < HEAP_VADDR_END)) {
-        *(T*)&g_heap[vaddr & HEAP_MASK] = data;
+        *(T*)&g_heap[vaddr - HEAP_VADDR] = data;
 
     // Shared memory
     } else if ((vaddr >= SHARED_MEMORY_VADDR)  && (vaddr < SHARED_MEMORY_VADDR_END)) {
-        *(T*)&g_shared_mem[vaddr & SHARED_MEMORY_MASK] = data;
+        *(T*)&g_shared_mem[vaddr - SHARED_MEMORY_VADDR] = data;
 
     // System memory
     } else if ((vaddr >= SYSTEM_MEMORY_VADDR)  && (vaddr < SYSTEM_MEMORY_VADDR_END)) {
-         *(T*)&g_system_mem[vaddr & SYSTEM_MEMORY_MASK] = data;
+        *(T*)&g_system_mem[vaddr - SYSTEM_MEMORY_VADDR] = data;
 
     // VRAM
     } else if ((vaddr >= VRAM_VADDR)  && (vaddr < VRAM_VADDR_END)) {
-        *(T*)&g_vram[vaddr & VRAM_MASK] = data;
+        *(T*)&g_vram[vaddr - VRAM_VADDR] = data;
 
     //} else if ((vaddr & 0xFFF00000) == 0x1FF00000) {
     //    _assert_msg_(MEMMAP, false, "umimplemented write to DSP memory");
@@ -148,31 +148,31 @@ inline void Write(const VAddr vaddr, const T data) {
 u8 *GetPointer(const VAddr vaddr) {
     // Kernel memory command buffer
     if (vaddr >= KERNEL_MEMORY_VADDR && vaddr < KERNEL_MEMORY_VADDR_END) {
-        return g_kernel_mem + (vaddr & KERNEL_MEMORY_MASK);
+        return g_kernel_mem + (vaddr - KERNEL_MEMORY_VADDR);
 
     // ExeFS:/.code is loaded here
     } else if ((vaddr >= EXEFS_CODE_VADDR)  && (vaddr < EXEFS_CODE_VADDR_END)) {
-        return g_exefs_code + (vaddr & EXEFS_CODE_MASK);
+        return g_exefs_code + (vaddr - EXEFS_CODE_VADDR);
 
     // FCRAM - GSP heap
     } else if ((vaddr >= HEAP_GSP_VADDR)  && (vaddr < HEAP_GSP_VADDR_END)) {
-        return g_heap_gsp + (vaddr & HEAP_GSP_MASK);
+        return g_heap_gsp + (vaddr - HEAP_GSP_VADDR);
 
     // FCRAM - application heap
     } else if ((vaddr >= HEAP_VADDR)  && (vaddr < HEAP_VADDR_END)) {
-        return g_heap + (vaddr & HEAP_MASK);
+        return g_heap + (vaddr - HEAP_VADDR);
 
     // Shared memory
     } else if ((vaddr >= SHARED_MEMORY_VADDR)  && (vaddr < SHARED_MEMORY_VADDR_END)) {
-        return g_shared_mem + (vaddr & SHARED_MEMORY_MASK);
+        return g_shared_mem + (vaddr - SHARED_MEMORY_VADDR);
 
     // System memory
     } else if ((vaddr >= SYSTEM_MEMORY_VADDR)  && (vaddr < SYSTEM_MEMORY_VADDR_END)) {
-         return g_system_mem + (vaddr & SYSTEM_MEMORY_MASK);
+        return g_system_mem + (vaddr - SYSTEM_MEMORY_VADDR);
 
     // VRAM
     } else if ((vaddr >= VRAM_VADDR)  && (vaddr < VRAM_VADDR_END)) {
-        return g_vram + (vaddr & VRAM_MASK);
+        return g_vram + (vaddr - VRAM_VADDR);
 
     } else {
         ERROR_LOG(MEMMAP, "unknown GetPointer @ 0x%08x", vaddr);