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Memcop from the flash to the ram

Hi, I tried to copy all the memory from the FLASh to the RAM.
When I try it with small code I succeed but when the code go larger (around 94Kbyts) I failed.

I work with at91sam7x512.

I do:

memcpy(mem_get_start_ram(), // dest mem_get_start_rom(), // source mem_get_size_rom()); // size

The start_ram - 0x00200000
The start_rom - 0x00000000
The size_rom - 0x00016FE0

after the memcpy it's go to prefetch abort, what did wrong?

thanks all, chiko

Parents

0 chiko diko over 15 years ago in reply to Mike Kleshov

How can I know if so?
where the stack locatd in the RAM?

From what I undersand the stack and the heap located in the end of the RAM. am I wrong?

In the Cstartup I do write this:

BSS_Start_Ptr
     Import  |Image$$ZI$$Base|
     DCD     |Image$$ZI$$Base|

BSS_End_Ptr
     Import  |Image$$ZI$$Limit|
     DCD     |Image$$ZI$$Limit|

ROM_Start
     Import  |Image$$RO$$Base|
     DCD     |Image$$RO$$Base|

RW_Start
     Import  |Image$$RW$$Base|
     DCD     |Image$$RO$$Limit| + 0x200000

In the origin it was
     DCD     |Image$$RW$$Base|

ROM_Size
     Import  |Image$$RO$$Limit|
     DCD     |Image$$RO$$Limit|

RAM_Start_Ptr
     DCD     0x200000

Reply

0 chiko diko over 15 years ago in reply to Mike Kleshov

How can I know if so?
where the stack locatd in the RAM?

From what I undersand the stack and the heap located in the end of the RAM. am I wrong?

In the Cstartup I do write this:

BSS_Start_Ptr
     Import  |Image$$ZI$$Base|
     DCD     |Image$$ZI$$Base|

BSS_End_Ptr
     Import  |Image$$ZI$$Limit|
     DCD     |Image$$ZI$$Limit|

ROM_Start
     Import  |Image$$RO$$Base|
     DCD     |Image$$RO$$Base|

RW_Start
     Import  |Image$$RW$$Base|
     DCD     |Image$$RO$$Limit| + 0x200000

In the origin it was
     DCD     |Image$$RW$$Base|

ROM_Size
     Import  |Image$$RO$$Limit|
     DCD     |Image$$RO$$Limit|

RAM_Start_Ptr
     DCD     0x200000

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