#include "string.h"
#include "stdlib.h"
#include "debug.h"
#include "stm32h7xx.h"
#include "myftl.h"


//每个块,第一个page的spare区,前四个字节的含义:
//第一个字节,表示该块是否是坏块:0XFF,正常块;其他值,坏块.
//第二个字节,表示该块是否被用过:0XFF,没有写过数据;0XCC,写过数据了.
//第三和第四个字节,表示该块所属的逻辑块编号. 

//每个page,spare区16字节以后的字节含义:
//第十六字节开始,后续每4个字节用于存储一个扇区(大小:NAND_ECC_SECTOR_SIZE)的ECC值,用于ECC校验


typedef struct{
  nand_if *nand;
  uint32_t block_num;
  uint16_t page_per_block;
  uint16_t block_per_plan;
  uint16_t plan_per_nand;
  uint32_t block_goodnum;
  uint32_t block_badnum;
  uint16_t lut[0];
}ftl_def;

static ftl_def *g_self;


int ftl_init(nand_if *n,uint32_t block_num)
{
  if(g_self) return -1;
  uint32_t size=sizeof(ftl_def)+ block_num*2;
  g_self=malloc(size);
  if(g_self==0){
    DBG_WARN("can not malloc memory");
    return -1;
  }
  memset(g_self,0,size);
  g_self->block_num=block_num;
  g_self->nand=n;
  return g_self->nand->init();
}



int ftl_create_lut(void)
{
  ftl_def *s=g_self;
  nand_if *n=s->nand;
  uint8_t buff[4];
  int index_logic;
  for(int i=0;i<s->block_num;i++)
  {
    s->lut[i]=0xffff;
  }
  s->block_goodnum=0;
  for(int i=0;i<s->block_num;i++)
  {
    n->read_page_spare_area(i/s->block_per_plan,i%s->block_per_plan,0,buff,4);
    
  }
}