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Memory watch: lsnes internal mmio area

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This commit is contained in:
Ilari Liusvaara 2012-09-07 18:11:05 +03:00
parent 56a7d0ac6d
commit 69483dec5c
1 changed files with 30 additions and 0 deletions
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30
src/core/memorymanip.cpp
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@ -2,6 +2,7 @@
#include "core/command.hpp"
#include "core/memorymanip.hpp"
#include "core/moviedata.hpp"
#include "core/misc.hpp"
#include "core/rom.hpp"
#include "library/string.hpp"
@ -41,6 +42,24 @@ namespace
uint64_t linear_ram_size = 0;
bool system_little_endian = true;
uint8_t lsnes_mmio_iospace_handler(uint64_t offset, uint8_t data, bool write)
{
if(offset >= 0 && offset < 8 && !write) {
//Frame counter.
uint64_t x = get_movie().get_current_frame();
return x >> (8 * (offset & 7));
} else if(offset >= 8 && offset < 16 && !write) {
//Movie length.
uint64_t x = get_movie().get_frame_count();
return x >> (8 * (offset & 7));
} else if(offset >= 16 && offset < 24 && !write) {
//Lag counter.
uint64_t x = get_movie().get_lag_frames();
return x >> (8 * (offset & 7));
} else
return 0;
}
struct translated_address translate_address(uint64_t rawaddr) throw()
{
struct translated_address t;
@ -49,6 +68,17 @@ namespace
t.memory = NULL;
t.memory_size = 0;
t.not_writable = true;
if((rawaddr >> 32) == 0xFFFFFFFFULL) {
//lsnes MMIO.
t.rel_addr = rawaddr & 0xFFFFFFFFULL;
t.raw_addr = rawaddr;
t.memory = NULL;
t.memory_size = 0x100000000ULL;
t.not_writable = false;
t.native_endian = false;
t.iospace_rw = lsnes_mmio_iospace_handler;
return t;
}
for(auto i : memory_regions) {
if(i.base > rawaddr || i.base + i.size <= rawaddr)
continue;