ru
所属分类：android开发
开发工具：Unix_Linux
文件大小：9KB
下载次数：5
上传日期：2015-01-20 15:17:42
上 传 者：
驴在哪
说明： x86 android 下读取io memory pci 的工具源码
(read io memory pci source tools under x86 android)
文件列表:
ru (0, 2014-09-18)
ru\Android.mk (158, 2014-03-26)
ru\readacpi.c (7358, 2014-03-26)
ru\readacpi1.c (1103, 2014-03-26)
ru\readcmos.c (1036, 2014-03-26)
ru\readec.c (2887, 2014-03-26)
ru\readioid.c (1044, 2014-07-22)
ru\readiosp.c (821, 2014-03-26)
ru\readpci.c (1190, 2014-03-26)
ru\ru.c (2398, 2014-07-22)
ru\rw.h (760, 2014-03-26)
/*
* read memory
* mode = r/w
* pos = index of memory
* value = the value want to change
*/
#define MY_PAGE_SIZE 4096
#define READ_SIZE 0x100
typedef unsigned long UINT32;
void readmem(char* mode, char* pos, char* addr, char* value)
{
int mem_fd, count;
unsigned long i, offset, address;
void* pMem;
unsigned long start;
unsigned int buff;
// start = start address
start = strtoul (pos, NULL, 16);
if( (mem_fd = open("/dev/mem", O_RDWR)) < 0 )
{
printf("Can't open /dev/mem.\n");
}
offset = start % MY_PAGE_SIZE;
// mmap(
, ,
// , ,
// , )
pMem = mmap(0, READ_SIZE + offset, PROT_READ|PROT_WRITE, MAP_SHARED, mem_fd, start - offset);
if( pMem == MAP_FAILED )
{
printf("Can't get the address poniter of PUART:%s\n", strerror(errno));
close(mem_fd);
}
if(DEBUG)
printf("mmap OK\n");
// pointer type determined by argument
if( strcmp(mode, "rb") == 0 )
{
count = 1;
for( i = offset ; i < offset + READ_SIZE ; i +=0x1)
{
printf(" %02x", *((unsigned char *)(pMem + i)));
if ( count == 16 && i != offset + READ_SIZE -1 )
{
printf("\n");
count = 0;
}
count++;
}
}
// pointer type determined by argument
else if( strcmp(mode, "rw") == 0 )
{
count = 1;
for( i = offset ; i < offset + READ_SIZE ; i +=0x2)
{
printf(" %04x", *((unsigned short *)(pMem + i)));
if ( count == 8 && i != offset + READ_SIZE -1 )
{
printf("\n");
count = 0;
}
count++;
}
}
// pointer type determined by argument
else if( strcmp(mode, "rd") == 0 )
{
count = 1;
for( i = offset ; i < offset + READ_SIZE ; i +=0x4)
{
printf(" %08x", *((unsigned int *)(pMem + i)));
if ( count == 4 && i != offset + READ_SIZE -1 )
{
printf("\n");
count = 0;
}
count++;
}
}
else if( strcmp(mode, "wb") == 0 )
{
address = strtoul (addr, NULL, 16);
sscanf(value, "%x", &buff);
lseek(mem_fd, offset + address, SEEK_SET);
write(mem_fd, &buff, 1);
}
else if( strcmp(mode, "ww") == 0 )
{
address = strtoul (addr, NULL, 16);
sscanf(value, "%x", &buff);
lseek(mem_fd, offset + address, SEEK_SET);
write(mem_fd, &buff, 2);
}
else if( strcmp(mode, "wd") == 0 )
{
address = strtoul (addr, NULL, 16);
sscanf(value, "%x", &buff);
lseek(mem_fd, offset + address, SEEK_SET);
write(mem_fd, &buff, 4);
}
munmap(pMem, READ_SIZE + offset);
close(mem_fd);
}
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