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#include <asm/arch/flash.h>
#include <asm/semaphore.h>
#include <linux/errno.h>
#include <linux/module.h>
#include <linux/config.h>
#include <linux/major.h>
#include <linux/slab.h>
#include <asm/fcntl.h>
#include <asm/unistd.h>
#include <asm/uaccess.h>
#include "cfi.h"
extern struct semaphore spare_lock;
int FindFooter(tfooter *** image_footer)
{
static tfooter * image_footers[MAX_FOOTER_NUM];
unsigned int footer_num=0;
//int flash_type;
unsigned int blocksize,addr,i;
tfooter * footer;
unsigned int * p;
unsigned long long sum;
*image_footer=image_footers;
if(cfiGetFlashSize() == 0 )
return -1;
addr=FLASH_BASE+BOOTER_BLOCK_LENGTH; // the 64kb of flash was preservied to boot loader
blocksize=cfiGetBlockSize(addr);
while( blocksize!= 0 )
{
addr+=blocksize;
footer=(tfooter *)(addr-sizeof(tfooter));
if(footer->signature==SIGNATURE_WORD)
{
p=(unsigned int *)footer;
sum=0;
for(i=0;i<sizeof(tfooter)/4-1;i++)// Not include the checksum
{
sum+=*(p+i);
}
sum = ~((sum&(-1LU))+(sum>>32));
if( (unsigned int)sum == footer->checksum )
image_footers[footer_num++]=footer;
}
blocksize=cfiGetBlockSize(addr);
}
return footer_num;
}
/*1 success 0 failure*/
asmlinkage int sys_FindImage(unsigned int image_num, tfooter ** image_footer)
{
int footer_num;
tfooter ** footer;
int i;
footer_num=FindFooter(&footer);
if(footer_num<=0)
{
return 0;
}
for(i=0;i<footer_num;i++)
{
if( footer[i]->num == image_num )
{
*image_footer=footer[i];
return 1;
}
}
return 0;
}
/*0 success*/
asmlinkage int sys_DelImage(unsigned int image_num)
{
unsigned int flash_type;
tfooter * footer;
unsigned int addr;
unsigned int blocksize;
unsigned int end;
unsigned long flags;
if( sys_FindImage( image_num, &footer) )
{
if(cfiGetFlashSize() == 0) {
printk("delete failed\n");
return -EINVAL;
}
addr=footer->base;
blocksize = cfiGetBlockSize(addr);
end=footer->base+footer->length;
end+=sizeof(tfooter);
//printk("end at:%x", end);
if((end & (blocksize-1)) == 0 )
end -= blocksize;
else
end = end&(~(blocksize-1));
//printk("end at:%x", end);
{
down(&spare_lock);
save_flags(flags); cli();
cfiGetBlockSize(end);
cfiCmd.erase(end,blocksize);
restore_flags(flags);
up(&spare_lock);
}
return 0;
}
printk("delete image failed\n");
return -EINVAL;
}
/*0 success 1 Corrupt*/
asmlinkage int sys_CorruptCheck(tfooter * image_footer)
{
int footer_num;
tfooter ** footer;
int i;
unsigned int a0,a1,b0,b1;
if( image_footer->base < (FLASH_BASE+BOOTER_BLOCK_LENGTH) )return 1;
if( image_footer->base+image_footer->length > (FLASH_BASE+cfiGetFlashSize()) )return 1;
footer_num=FindFooter(&footer);
if(footer_num<=0)
return 0;
for(i=0;i<footer_num;i++)
{
if( image_footer->num == footer[i]->num ) {
printk("iamge exists");
return 1;
}
}
b0=image_footer->base;
if( FLASH_BLOCK_SIZE-(image_footer->length%FLASH_BLOCK_SIZE) < sizeof(tfooter) )
b1=image_footer->base+image_footer->length+FLASH_BLOCK_SIZE;
else
b1=image_footer->base+image_footer->length;
for(i=0;i<footer_num;i++)
{
a0=footer[i]->base;
if( (FLASH_BLOCK_SIZE-(footer[i]->length%FLASH_BLOCK_SIZE) < sizeof(tfooter)) || !(footer[i]->length&(FLASH_BLOCK_SIZE-1)) )
a1=footer[i]->base+footer[i]->length+FLASH_BLOCK_SIZE;
else
a1=footer[i]->base+footer[i]->length;
if( (b0 >= a0) && (b0 < a1) )return 1;
if( (b1 >= a0) && (b1 < a1) )return 1;
if( (a0 > b0) && (a1 < b1) )return 1;
}
return 0;
}
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