/* 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"

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);
        }

        if(mload_fd<0)
                {

                if(hid>=0)
                        {
                        //iosDestroyHeap(hid);
                        hid=-1;
                        }
                }

return mload_fd;
}

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

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

int mload_close()
{
int ret;

        if(hid>=0)
                {
                //iosDestroyHeap(hid);
                hid=-1;
                }

        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>=0)
                {
                //iosDestroyHeap(hid);
                hid=-1;
                }

        hid = iosCreateHeap(len+0x800);

        if(hid<0) return hid;

        buf= iosAlloc(hid, len);

        if(!buf) {ret= -1;goto out;}


        memcpy(buf, addr,len);

        ret = IOS_IoctlvFormat(hid, mload_fd, MLOAD_LOAD_MODULE, ":d", buf, len);

        if(ret<0) goto out;

        ret=IOS_IoctlvFormat(hid, mload_fd, MLOAD_RUN_MODULE, ":");

        if(ret<0) {ret= -666;goto out;}

out:
        if(hid>=0)
                {
                //iosDestroyHeap(hid);
                hid=-1;
                }

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; 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)
{
int ret;


        if(mload_init()<0) return -1;

        ret= IOS_IoctlvFormat(hid, mload_fd, MLOAD_RUN_THREAD, "iiii:", starlet_addr,starlet_top_stack, stack_size, priority);


return ret;
}

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

// stops one starlet thread

int mload_stop_thread(int id)
{
int ret;

        if(mload_init()<0) return -1;

        ret= IOS_IoctlvFormat(hid, mload_fd, MLOAD_STOP_THREAD, "i:", id);

return ret;

}

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

// continue one stopped starlet thread

int mload_continue_thread(int id)
{
int ret;

        if(mload_init()<0) return -1;

        ret= IOS_IoctlvFormat(hid, mload_fd, MLOAD_CONTINUE_THREAD, "i:", id);

return ret;

}
/*--------------------------------------------------------------------------------------------------------------*/

// 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)
{
int ret;

        if(mload_init()<0) return -1;

        ret= IOS_IoctlvFormat(hid, mload_fd, MLOAD_MEMSET, "iii:", starlet_addr, set, len);


return ret;
}

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

// 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, ":");
        if(ret<0) return NULL;

return (void *) ret;
}

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

// set the dev/es ioctlv in routine

int mload_set_ES_ioctlv_vector(void *starlet_addr)
{
int ret;

        if(mload_init()<0) return -1;

        ret= IOS_IoctlvFormat(hid, mload_fd, MLOAD_SET_ES_IOCTLV, "i:", starlet_addr);

return ret;
}



int mload_getw(const void * addr, u32 *dat)
{
int ret;

        if(mload_init()<0) return -1;

        ret= IOS_IoctlvFormat(hid, mload_fd, MLOAD_GETW, "i:i", addr, dat);

return ret;
}

int mload_geth(const void * addr, u16 *dat)
{
int ret;

        if(mload_init()<0) return -1;

        ret= IOS_IoctlvFormat(hid, mload_fd, MLOAD_GETH, "i:h", addr, dat);

return ret;
}

int mload_getb(const void * addr, u8 *dat)
{
int ret;

        if(mload_init()<0) return -1;

        ret= IOS_IoctlvFormat(hid, mload_fd, MLOAD_GETB, "i:b", addr, dat);

return ret;
}

int mload_setw(const void * addr, u32 dat)
{
int ret;

        if(mload_init()<0) return -1;

        ret= IOS_IoctlvFormat(hid, mload_fd, MLOAD_SETW, "ii:", addr, dat);

return ret;
}

int mload_seth(const void * addr, u16 dat)
{
int ret;

        if(mload_init()<0) return -1;

        ret= IOS_IoctlvFormat(hid, mload_fd, MLOAD_SETH, "ih:", addr, dat);

return ret;
}

int mload_setb(const void * addr, u8 dat)
{
int ret;

        if(mload_init()<0) return -1;

        ret= IOS_IoctlvFormat(hid, mload_fd, MLOAD_SETB, "ib:", addr, dat);

return ret;
}

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

// 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()
{
int ret;

        if(mload_init()<0) return -1;

        ret= IOS_IoctlvFormat(hid, mload_fd, MLOAD_GET_LOG, ":");

return ret;

}


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

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

int mload_get_IOS_base()
{
int ret;

       // if(mload_init()<0) return -1;

        ret= IOS_IoctlvFormat(hid, mload_fd, MLOAD_GET_IOS_BASE, ":");

       // if(mload_close()<0) return -1;
return ret;

}


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



/* 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));
        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;
                }
        }
		//if(mload_close()<0) return -1;
        return ret;
}