https://bitbucket.org/hudson/magic-lantern
Tip revision: fdfea81db90ed5bb992fc03d0fd79603735184b9 authored by a1ex on 16 July 2014, 20:01:31 UTC
Close branch 600D_stubs
Close branch 600D_stubs
Tip revision: fdfea81
exmem.c
#define NO_MALLOC_REDIRECT
#include "dryos.h"
#include "bmp.h"
extern void* _malloc(size_t size);
extern void _free(void* ptr);
// experimental memory allocation from shooting buffer (~160MB on 5D2)
typedef struct
{
struct memSuite *ret;
uint32_t size;
uint32_t timed_out;
struct semaphore * sem;
} alloc_msg_t;
static struct semaphore * alloc_sem = 0;
static struct semaphore * free_sem = 0;
static volatile void* entire_memory_allocated = 0;
int GetNumberOfChunks(struct memSuite * suite)
{
CHECK_SUITE_SIGNATURE(suite);
return suite->num_chunks;
}
int GetSizeOfMemorySuite(struct memSuite * suite)
{
CHECK_SUITE_SIGNATURE(suite);
return suite->size;
}
int GetSizeOfMemoryChunk(struct memChunk * chunk)
{
CHECK_CHUNK_SIGNATURE(chunk);
return chunk->size;
}
static void freeCBR(unsigned int a)
{
give_semaphore(free_sem);
}
static void freeCBR_nowait(unsigned int a)
{
}
void _shoot_free_suite(struct memSuite * hSuite)
{
FreeMemoryResource(hSuite, freeCBR, 0);
take_semaphore(free_sem, 0);
if (hSuite == entire_memory_allocated) entire_memory_allocated = 0;
}
static void allocCBR(unsigned int priv, struct memSuite * hSuite)
{
alloc_msg_t *suite_info = (alloc_msg_t *)priv;
/* in case we timed out last time, immediately free the newly allocated suite (its the one that timed out) */
if(suite_info->timed_out)
{
FreeMemoryResource(hSuite, freeCBR_nowait, 0);
_free(suite_info);
return;
}
suite_info->ret = hSuite;
give_semaphore(suite_info->sem);
}
unsigned int exmem_save_buffer(struct memSuite * hSuite, char *file)
{
unsigned int written = 0;
FILE *f = FIO_CreateFile(file);
if (f != (void*) -1)
{
struct memChunk *currentChunk;
unsigned char *chunkAddress;
unsigned int chunkAvail;
currentChunk = GetFirstChunkFromSuite(hSuite);
while(currentChunk)
{
chunkAvail = GetSizeOfMemoryChunk(currentChunk);
chunkAddress = (unsigned char*)GetMemoryAddressOfMemoryChunk(currentChunk);
FIO_WriteFile(f, chunkAddress, chunkAvail);
written += chunkAvail;
currentChunk = GetNextMemoryChunk(hSuite, currentChunk);
}
FIO_CloseFile(f);
}
return written;
}
unsigned int exmem_clear(struct memSuite * hSuite, char fill)
{
unsigned int written = 0;
struct memChunk *currentChunk;
unsigned char *chunkAddress;
unsigned int chunkAvail;
currentChunk = GetFirstChunkFromSuite(hSuite);
while(currentChunk)
{
chunkAvail = GetSizeOfMemoryChunk(currentChunk);
chunkAddress = (unsigned char*)GetMemoryAddressOfMemoryChunk(currentChunk);
memset(CACHEABLE(chunkAddress), fill, chunkAvail);
written += chunkAvail;
currentChunk = GetNextMemoryChunk(hSuite, currentChunk);
}
return written;
}
/* when size is set to zero, it will try to allocate the maximum possible block */
static struct memSuite *shoot_malloc_suite_int(size_t size, int relaxed)
{
alloc_msg_t *suite_info = _malloc(sizeof(alloc_msg_t));
suite_info->ret = NULL;
suite_info->timed_out = 0;
suite_info->size = size;
suite_info->sem = alloc_sem;
AllocateMemoryResource(size, allocCBR, (unsigned int)suite_info, 0x50);
int r = take_semaphore(suite_info->sem, 1000);
if (r)
{
suite_info->timed_out = 1;
return NULL;
}
struct memSuite * hSuite = suite_info->ret;
_free(suite_info);
if(!relaxed)
{
ASSERT((int)size <= hSuite->size);
}
return hSuite;
}
struct memSuite *_shoot_malloc_suite(size_t size)
{
if(entire_memory_allocated)
{
/* you may need to solder some more RAM chips */
return 0;
}
if(size)
{
/* allocate exact memory size */
return shoot_malloc_suite_int(size, 0);
}
else
{
/* allocate some backup that will service the queued allocation request that fails during the loop */
int backup_size = 8 * 1024 * 1024;
int max_size = 0;
struct memSuite *backup = shoot_malloc_suite_int(backup_size, 0);
for(int size = 4; size < 1024; size += 4)
{
struct memSuite *testSuite = shoot_malloc_suite_int(size * 1024 * 1024, 1);
if(testSuite)
{
_shoot_free_suite(testSuite);
max_size = size * 1024 * 1024;
}
else
{
break;
}
}
/* now free the backup suite. this causes the queued allocation before to get finished. as we timed out, it will get freed immediately in exmem.c:allocCBR */
_shoot_free_suite(backup);
/* allocating max_size + backup_size was reported to fail sometimes */
struct memSuite * hSuite = shoot_malloc_suite_int(max_size + backup_size - 1024 * 1024, 1);
entire_memory_allocated = hSuite; /* we need to know which memory suite ate all the RAM; when this is freed, we can shoot_malloc again */
return hSuite;
}
}
struct memSuite * _shoot_malloc_suite_contig(size_t size)
{
if (entire_memory_allocated)
{
/* you may need to solder some more RAM chips */
return 0;
}
if(size > 0)
{
alloc_msg_t *suite_info = _malloc(sizeof(alloc_msg_t));
suite_info->ret = NULL;
suite_info->timed_out = 0;
suite_info->size = size;
suite_info->sem = alloc_sem;
AllocateContinuousMemoryResource(size, allocCBR, (unsigned int)suite_info, 0x50);
int r = take_semaphore(suite_info->sem, 1000);
if (r)
{
suite_info->timed_out = 1;
return NULL;
}
struct memSuite * hSuite = suite_info->ret;
_free(suite_info);
ASSERT((int)size <= hSuite->size);
return hSuite;
}
else
{
//~ entire_memory_allocated = (void*) -1; /* temporary, just mark as busy */
/* find the largest chunk and try to allocate it */
struct memSuite * hSuite = _shoot_malloc_suite(0);
if (!hSuite) return 0;
int max_size = 0;
struct memChunk * hChunk = GetFirstChunkFromSuite(hSuite);
while(hChunk)
{
int size = GetSizeOfMemoryChunk(hChunk);
max_size = MAX(max_size, size);
hChunk = GetNextMemoryChunk(hSuite, hChunk);
}
_shoot_free_suite(hSuite);
hSuite = _shoot_malloc_suite_contig(max_size);
entire_memory_allocated = hSuite; /* we need to know which memory suite ate all the RAM; when this is freed, we can shoot_malloc again */
return hSuite;
}
}
void* _shoot_malloc(size_t size)
{
struct memSuite * theSuite = _shoot_malloc_suite_contig(size + 4);
if (!theSuite) return 0;
/* now we only have to tweak some things so it behaves like plain malloc */
void* hChunk = (void*) GetFirstChunkFromSuite(theSuite);
void* ptr = (void*) GetMemoryAddressOfMemoryChunk(hChunk);
*(struct memSuite **)ptr = theSuite;
//~ printf("shoot_malloc(%s) => %x hSuite=%x\n", format_memory_size(size), ptr+4, theSuite);
return ptr + 4;
}
void _shoot_free(void* ptr)
{
if (!ptr) return;
if ((intptr_t)ptr & 3) return;
struct memSuite * hSuite = *(struct memSuite **)(ptr - 4);
//~ printf("shoot_free(%x) hSuite=%x\n", ptr, hSuite);
FreeMemoryResource(hSuite, freeCBR, 0);
take_semaphore(free_sem, 0);
if (hSuite == entire_memory_allocated) entire_memory_allocated = 0;
}
/* just a dummy heuristic for now */
int _shoot_get_free_space()
{
if (!alloc_sem)
{
return 0;
}
if (entire_memory_allocated)
{
return 0;
}
else
{
return (int)(31.5*1024*1024);
}
}
#if 0
void exmem_test()
{
struct memSuite * hSuite = 0;
struct memChunk * hChunk = 0;
msleep(2000);
AllocateMemoryResource(1024*1024*32, allocCBR, (unsigned int)&hSuite, 0x50);
int r = take_semaphore(alloc_sem, 1000);
if (r) return;
if(!hSuite)
{
bmp_printf(FONT(FONT_MED, COLOR_WHITE, COLOR_BLACK), 0, 0, "Alloc Fail");
return;
}
hChunk = GetFirstChunkFromSuite(hSuite);
int num = 0;
bmp_printf(FONT(FONT_MED, COLOR_WHITE, COLOR_BLACK), 0, 0, "C:%d S:0x%08X", GetNumberOfChunks(hSuite), GetSizeOfMemorySuite(hSuite) );
while(hChunk)
{
if(num > 13)
{
num = 13;
}
bmp_printf(FONT(FONT_MED, COLOR_WHITE, COLOR_BLACK), 0, 30 + num * 20,
"[%d] A:0x%08X S:0x%08X R:0x%08X", num, GetMemoryAddressOfMemoryChunk(hChunk), GetSizeOfMemoryChunk(hChunk), GetRemainOfMemoryChunk(hChunk));
hChunk = GetNextMemoryChunk(hSuite, hChunk);
num++;
}
bmp_printf(FONT(FONT_MED, COLOR_WHITE, COLOR_BLACK), 0, 30 + num++ * 20, "Done");
FreeMemoryResource(hSuite, freeCBR, 0);
}
#endif
static void exmem_init()
{
alloc_sem = create_named_semaphore(0,0);
free_sem = create_named_semaphore(0,0);
}
INIT_FUNC("exmem", exmem_init);