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#include <revolution.h>
#include <revolution/os.h>
#define ROUND(n, a) (((u32)(n) + (a)-1) & ~((a)-1))
#define TRUNC(n, a) (((u32)(n)) & ~((a)-1))
static void* s_mem2ArenaHi;
static void* __OSArenaHi;
static void* __OSArenaLo = (void*)-1;
static void* s_mem2ArenaLo = (void*)-1;
void* OSGetMEM1ArenaHi(void) {
ASSERTMSGLINE(71, (u32)__OSArenaLo != -1, "OSGetArenaHi(): OSInit() must be called in advance.");
ASSERTMSGLINE(73, (u32)__OSArenaLo <= (u32)__OSArenaHi, "OSGetArenaHi(): invalid arena (hi < lo).");
return __OSArenaHi;
}
void* OSGetMEM2ArenaHi(void) {
return s_mem2ArenaHi;
}
void* OSGetArenaHi(void) {
return OSGetMEM1ArenaHi();
}
void* OSGetMEM1ArenaLo(void) {
ASSERTMSGLINE(99, (u32)__OSArenaLo != -1, "OSGetArenaLo(): OSInit() must be called in advance.");
ASSERTMSGLINE(101, (u32)__OSArenaLo <= (u32)__OSArenaHi, "OSGetArenaLo(): invalid arena (hi < lo).");
return __OSArenaLo;
}
void* OSGetMEM2ArenaLo(void) {
return s_mem2ArenaLo;
}
void* OSGetArenaLo(void) {
return OSGetMEM1ArenaLo();
}
void OSSetMEM1ArenaHi(void* newHi) {
__OSArenaHi = newHi;
}
void OSSetMEM2ArenaHi(void* newHi) {
s_mem2ArenaHi = newHi;
}
void OSSetArenaHi(void* newHi) {
OSSetMEM1ArenaHi(newHi);
}
void OSSetMEM1ArenaLo(void* newLo) {
__OSArenaLo = newLo;
}
void OSSetMEM2ArenaLo(void* newLo) {
s_mem2ArenaLo = newLo;
}
void OSSetArenaLo(void* newLo) {
OSSetMEM1ArenaLo(newLo);
}
void* OSAllocFromMEM1ArenaLo(u32 size, u32 align) {
void* ptr;
u8* arenaLo;
ptr = OSGetMEM1ArenaLo();
arenaLo = ptr = (void*)ROUND(ptr, align);
arenaLo += size;
arenaLo = (u8*)ROUND(arenaLo, align);
OSSetMEM1ArenaLo(arenaLo);
return ptr;
}
void* OSAllocFromMEM1ArenaHi(u32 size, u32 align) {
void* ptr;
u8* arenaHi;
arenaHi = OSGetMEM1ArenaHi();
arenaHi = (u8*)TRUNC(arenaHi, align);
arenaHi -= size;
arenaHi = ptr = (void*)TRUNC(arenaHi, align);
OSSetMEM1ArenaHi(arenaHi);
return ptr;
}
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