vita_vram_probe

main.c

#include <pspkernel.h>
#include <pspiofilemgr.h>
#include <pspge.h>
#include <stdio.h>
#include <string.h>

PSP_MODULE_INFO("bram test", 0, 1, 0);
PSP_MAIN_THREAD_ATTR(PSP_THREAD_ATTR_USER);
PSP_MAIN_THREAD_STACK_SIZE_KB(8192);
PSP_HEAP_SIZE_KB(0);
#define LOG_PATH "ms0:/vram_test.log"

#define LOG(...) { \
	int _fd = sceIoOpen(LOG_PATH, PSP_O_WRONLY | PSP_O_CREAT | PSP_O_APPEND, 0777); \
	if (_fd > 0){ \
		char _log_buf[2048] = {0}; \
		int _len = sprintf(_log_buf, __VA_ARGS__); \
		sceIoWrite(_fd, _log_buf, _len); \
		sceIoClose(_fd); \
	} \
}

static void init_logging(){
	int fd = sceIoOpen(LOG_PATH, PSP_O_WRONLY | PSP_O_CREAT | PSP_O_TRUNC, 0777);
	if (fd > 0){
		sceIoClose(fd);
	}
}

static int read_mem(const void *src, int len){
	for(int i = 0;i < len;i++){
		u32 val = *(u8*)&src[i];
		LOG("0x%02x ", val);
	}
	LOG("\n");
}

static void test_write(void *dst, void * buf, int len){
	LOG("pre-write of 0x%x:\n", dst);
	read_mem(dst, len);
	memcpy(dst, buf, len);
	LOG("post-write of 0x%x:\n", dst);
	read_mem(dst, len);
}

int main(int argc, char *argv[])
{
	init_logging();
	LOG("vram test\n");

	LOG("%s: sceGeEdramGetAddr returns 0x%08x\n\n", __func__, sceGeEdramGetAddr());

	for (int i = 0;i < 2;i++){
		u8 test_array[] = {0 + i, 1 + i, 2 + i, 3 + i, 4 + i, 5 + i, 6 + i, 7 + i, 8 + i};
		test_write((void *)0x44000000, test_array, sizeof(test_array));
		test_write((void *)0x44100000, test_array, sizeof(test_array));
		test_write((void *)0x44200000, test_array, sizeof(test_array));
		test_write((void *)0x44300000, test_array, sizeof(test_array));
		LOG("\n");
	}

	sceKernelExitGame();
    return 0;
}