/* mload.c (for PPC) (c) 2009, Hermes 

  This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
*/

#include "mload.h"
#include "gecko/gecko.h"

static const char mload_fs[] ATTRIBUTE_ALIGN(32) = "/dev/mload";

static s32 mload_fd = -1;
static s32 hid = -1;

/*--------------------------------------------------------------------------------------------------------------*/

// to init/test if the device is running

int mload_init()
{
	int n;

	if(hid<0) hid = iosCreateHeap(0x800);

	if(hid<0)
	{
		if(mload_fd>=0)
			IOS_Close(mload_fd);

		mload_fd=-1;
		return hid;
	}

	if(mload_fd>=0) 
	{
		return 0;
	}

	for(n=0;n<20;n++) // try 5 seconds
	{
		mload_fd=IOS_Open(mload_fs, 0);
		if(mload_fd>=0) break;
		usleep(250*1000);
	}

	return mload_fd;
}

/*--------------------------------------------------------------------------------------------------------------*/

// to close the device (remember call it when rebooting the IOS!)

int mload_close()
{
	int ret;

	if(mload_fd<0) return -1;
	ret=IOS_Close(mload_fd);
	mload_fd=-1;
	return ret;
}

/*--------------------------------------------------------------------------------------------------------------*/

// to get the thread id of mload

int mload_get_thread_id()
{
	int ret;
	
	if(mload_init()<0) return -1;
	ret= IOS_IoctlvFormat(hid, mload_fd, MLOAD_MLOAD_THREAD_ID, ":");
	return ret;

}

/*--------------------------------------------------------------------------------------------------------------*/

// get the base and the size of the memory readable/writable to load modules

int mload_get_load_base(u32 *starlet_base, int *size)
{
	int ret;

	if(mload_init()<0) return -1;
	ret= IOS_IoctlvFormat(hid, mload_fd, MLOAD_GET_LOAD_BASE, ":ii",starlet_base, size);
	return ret;
}

/*--------------------------------------------------------------------------------------------------------------*/

// load and run a module from starlet (it need to allocate MEM2 to send the elf file)
// the module must be a elf made with stripios

int mload_module(void *addr, int len)
{
	int ret;
	void *buf = NULL;

	if(mload_init() < 0) return -1;
	if (hid == -1) hid = iosCreateHeap(len+0x800);
	if (hid < 0) return hid;

	buf= iosAlloc(hid, len);
	if(!buf)
	{
		return -1;
	}
	
	memcpy(buf, addr,len);

	ret = IOS_IoctlvFormat(hid, mload_fd, MLOAD_LOAD_MODULE, ":d", buf, len);
	if(ret < 0) return ret;
	
	ret=IOS_IoctlvFormat(hid, mload_fd, MLOAD_RUN_MODULE, ":");
	if(ret < 0)
	{
		return -666;
	}
	return ret;
}

/*--------------------------------------------------------------------------------------------------------------*/

// load a module from the PPC
// the module must be a elf made with stripios

int mload_elf(void *my_elf, data_elf *data_elf)
{
	int n,m;
	int p;
	u8 *adr;
	u32 elf=(u32) my_elf;

	if(elf & 3) return -1; // aligned to 4 please!

	elfheader *head=(void *) elf;
	elfphentry *entries;

	if(head->ident0!=0x7F454C46) return -1;
	if(head->ident1!=0x01020161) return -1;
	if(head->ident2!=0x01000000) return -1;

	p=head->phoff;

	data_elf->start=(void *)  head->entry;

	for(n=0; n<head->phnum; n++)
	{
		entries=(void *) (elf+p);
		p+=sizeof(elfphentry);

		if(entries->type == 4)
		{
			adr=(void *) (elf + entries->offset);

			if(getbe32(0)!=0) return -2; // bad info (sure)

			for(m=4; (u32)m < entries->memsz; m+=8)
			{
				switch(getbe32(m))
				{
					case 0x9:
						data_elf->start= (void *) getbe32(m+4);
						break;
					case 0x7D:
						data_elf->prio= getbe32(m+4);
						break;
					case 0x7E:
						data_elf->size_stack= getbe32(m+4);
						break;
					case 0x7F:
						data_elf->stack= (void *) (getbe32(m+4));
						break;
				}
			}
		}
		else
		{
			if(entries->type == 1  && entries->memsz != 0 && entries->vaddr!=0)
			{
				if(mload_memset((void *) entries->vaddr, 0, entries->memsz)<0) return -1;
				if(mload_seek(entries->vaddr, SEEK_SET)<0) return -1;
				if(mload_write((void *) (elf + entries->offset), entries->filesz)<0) return -1;
			}
		}
	}
	return 0;
}

/*--------------------------------------------------------------------------------------------------------------*/

// run one thread (you can use to load modules or binary files)

int mload_run_thread(void *starlet_addr, void *starlet_top_stack, int stack_size, int priority)
{
	if(mload_init()<0) return -1;
	return IOS_IoctlvFormat(hid, mload_fd, MLOAD_RUN_THREAD, "iiii:", starlet_addr,starlet_top_stack, stack_size, priority);
}

/*--------------------------------------------------------------------------------------------------------------*/

// stops one starlet thread

int mload_stop_thread(int id)
{
	if(mload_init()<0) return -1;
	return IOS_IoctlvFormat(hid, mload_fd, MLOAD_STOP_THREAD, "i:", id);
}

/*--------------------------------------------------------------------------------------------------------------*/

// continue one stopped starlet thread

int mload_continue_thread(int id)
{
	if(mload_init()<0) return -1;
	return IOS_IoctlvFormat(hid, mload_fd, MLOAD_CONTINUE_THREAD, "i:", id);
}
/*--------------------------------------------------------------------------------------------------------------*/

// fix starlet address to read/write (uses SEEK_SET, etc as mode)

int mload_seek(int offset, int mode) 
{
	if(mload_init()<0) return -1;
	return IOS_Seek(mload_fd, offset, mode);
}

/*--------------------------------------------------------------------------------------------------------------*/

// read bytes from starlet (it update the offset)

int mload_read(void* buf, u32 size) 
{
	if(mload_init()<0) return -1;
	return IOS_Read(mload_fd, buf, size);
}

/*--------------------------------------------------------------------------------------------------------------*/

// write bytes from starlet (it update the offset)

int mload_write(const void * buf, u32 size) 
{
	if(mload_init()<0) return -1;
	return IOS_Write(mload_fd, buf, size);
}

/*--------------------------------------------------------------------------------------------------------------*/

// fill a block (similar to memset)

int mload_memset(void *starlet_addr, int set, int len)
{
	if(mload_init()<0) return -1;
	return IOS_IoctlvFormat(hid, mload_fd, MLOAD_MEMSET, "iii:", starlet_addr, set, len);
}

/*--------------------------------------------------------------------------------------------------------------*/

// get the ehci datas ( ehcmodule.elf uses this address)

void * mload_get_ehci_data()
{
	int ret;

	if(mload_init() < 0) return NULL;
	ret = IOS_IoctlvFormat(hid, mload_fd, MLOAD_GET_EHCI_DATA, ":");
	return (ret < 0) ? NULL : (void *) ret;
}

/*--------------------------------------------------------------------------------------------------------------*/

// set the dev/es ioctlv in routine

int mload_set_ES_ioctlv_vector(void *starlet_addr)
{
	if(mload_init()<0) return -1;
	return IOS_IoctlvFormat(hid, mload_fd, MLOAD_SET_ES_IOCTLV, "i:", starlet_addr);
}



int mload_getw(const void * addr, u32 *dat)
{
	if(mload_init()<0) return -1;
	return IOS_IoctlvFormat(hid, mload_fd, MLOAD_GETW, "i:i", addr, dat);
}

int mload_geth(const void * addr, u16 *dat)
{
	if(mload_init()<0) return -1;
	return IOS_IoctlvFormat(hid, mload_fd, MLOAD_GETH, "i:h", addr, dat);
}

int mload_getb(const void * addr, u8 *dat)
{
	if(mload_init()<0) return -1;
	return IOS_IoctlvFormat(hid, mload_fd, MLOAD_GETB, "i:b", addr, dat);
}

int mload_setw(const void * addr, u32 dat)
{
	if(mload_init()<0) return -1;
	return IOS_IoctlvFormat(hid, mload_fd, MLOAD_SETW, "ii:", addr, dat);
}

int mload_seth(const void * addr, u16 dat)
{
	if(mload_init()<0) return -1;
	return IOS_IoctlvFormat(hid, mload_fd, MLOAD_SETH, "ih:", addr, dat);
}

int mload_setb(const void * addr, u8 dat)
{
	if(mload_init()<0) return -1;
	return IOS_IoctlvFormat(hid, mload_fd, MLOAD_SETB, "ib:", addr, dat);
}

/*--------------------------------------------------------------------------------------------------------------*/

// to get log buffer
// this function return the size of the log buffer and prepare it to read with mload_read() the datas

int mload_get_log()
{
	if(mload_init()<0) return -1;
	return IOS_IoctlvFormat(hid, mload_fd, MLOAD_GET_LOG, ":");
}


/*--------------------------------------------------------------------------------------------------------------*/

// to get IOS base for dev/es  to create the cIOS

int mload_get_IOS_base()
{
	if(mload_init()<0) return -1;
	return IOS_IoctlvFormat(hid, mload_fd, MLOAD_GET_IOS_BASE, ":");
}


int mload_get_version()
{
	if(mload_init()<0) return -1;
	return IOS_IoctlvFormat(hid, mload_fd, MLOAD_GET_MLOAD_VERSION, ":");
}

/* IOS info structure */
typedef struct {
	/* Syscall base */
	u32 syscall;

	/* Module versions */
	u32 dipVersion;
	u32 esVersion;
	u32 ffsVersion;
	u32 iopVersion;
} iosInfo;

int wanin_mload_get_IOS_base()
{
	int ret;
	iosInfo ios;
	memset(&ios, 0, sizeof(ios));

	if(mload_init()<0) return -1;
	
	ret = IOS_IoctlvFormat(hid, mload_fd, MLOAD_GET_IOS_BASE, ":d", &ios, sizeof(ios));
	//gprintf("get_ios_base: %d %x\n", ret, ios.dipVersion);
	if (ret == 0) {
		switch(ios.dipVersion) {
			case 0x48776F72: /* DIP: 07/11/08 14:34:26 */
				return 37;
			case 0x4888E14C: /* DIP: 07/24/08 20:08:44 */
				return 38;
			case 0x4A262AF5: /* DIP: 06/03/09 07:49:09 */
				return 57;
			case 0x492ACA9D: /* DIP: 11/24/08 15:39:09 */
				return 60;
		}
	}
	return ret;
}

int mload_set_gecko_debug()
{
	u32 log_mode = 2; // GECKO
	if(mload_init()<0) return -1;
	return IOS_IoctlvFormat(hid, mload_fd, MLOAD_SET_LOG_MODE, ":d", &log_mode, sizeof(log_mode));
}