706 lines
31 KiB
C
706 lines
31 KiB
C
/****************************************************************************************
|
|
| Description: bootloader flash driver source file
|
|
| File Name: flash.c
|
|
|
|
|
|----------------------------------------------------------------------------------------
|
|
| C O P Y R I G H T
|
|
|----------------------------------------------------------------------------------------
|
|
| Copyright (c) 2011 by Feaser http://www.feaser.com All rights reserved
|
|
|
|
|
|----------------------------------------------------------------------------------------
|
|
| L I C E N S E
|
|
|----------------------------------------------------------------------------------------
|
|
| This file is part of OpenBLT. OpenBLT 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 3 of the License, or (at your option) any later
|
|
| version.
|
|
|
|
|
| OpenBLT 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 OpenBLT.
|
|
| If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
|
| A special exception to the GPL is included to allow you to distribute a combined work
|
|
| that includes OpenBLT without being obliged to provide the source code for any
|
|
| proprietary components. The exception text is included at the bottom of the license
|
|
| file <license.html>.
|
|
|
|
|
****************************************************************************************/
|
|
|
|
/****************************************************************************************
|
|
* Include files
|
|
****************************************************************************************/
|
|
#include "boot.h" /* bootloader generic header */
|
|
|
|
|
|
/****************************************************************************************
|
|
* Macro definitions
|
|
****************************************************************************************/
|
|
#define FLASH_INVALID_SECTOR (0xff)
|
|
#define FLASH_INVALID_ADDRESS (0xffffffff)
|
|
#define FLASH_WRITE_BLOCK_SIZE (512)
|
|
#define FLASH_TOTAL_SECTORS (sizeof(flashLayout)/sizeof(flashLayout[0]))
|
|
/* entry address for the IAP algorithms, enabling a switch to thumb mode */
|
|
#define IAP_ENTRY_ADDRESS (0x7ffffff1)
|
|
/* command codes */
|
|
#define IAP_CMD_PREPARE_SECTORS (50)
|
|
#define IAP_CMD_COPY_RAM_TO_FLASH (51)
|
|
#define IAP_CMD_ERASE_SECTORS (52)
|
|
#define IAP_CMD_BLANK_CHECK_SECTORS (53)
|
|
#define IAP_CMD_COMPARE (56)
|
|
/* result codes */
|
|
#define IAP_CMD_SUCCESS (0)
|
|
|
|
|
|
/****************************************************************************************
|
|
* Type definitions
|
|
****************************************************************************************/
|
|
/* function pointer type that is needed to call IAP functions of the NXP LPC2xxx */
|
|
typedef void (*pIapHandler)(blt_int32u command[], blt_int32u result[]);
|
|
|
|
/* flash sector descriptor type */
|
|
typedef struct
|
|
{
|
|
blt_addr sector_start; /* sector start address */
|
|
blt_int32u sector_size; /* sector size in bytes */
|
|
blt_int8u sector_num; /* sector number */
|
|
} tFlashSector; /* flash sector description */
|
|
|
|
/* programming is done per block of max FLASH_WRITE_BLOCK_SIZE. for this a flash block
|
|
* manager is implemented in this driver. this flash block manager depends on this
|
|
* flash block info structure. It holds the base address of the flash block and the
|
|
* data that should be programmed into the flash block. Note that the .data member must
|
|
* be 32-bit aligned by the linker. the .base_addr must be a multiple of
|
|
* FLASH_WRITE_BLOCK_SIZE.
|
|
*/
|
|
typedef struct
|
|
{
|
|
blt_addr base_addr;
|
|
blt_int8u data[FLASH_WRITE_BLOCK_SIZE] __attribute__ ((aligned (4)));
|
|
} tFlashBlockInfo;
|
|
|
|
|
|
/****************************************************************************************
|
|
* Function prototypes
|
|
****************************************************************************************/
|
|
static blt_bool FlashInitBlock(tFlashBlockInfo *block, blt_addr address);
|
|
static tFlashBlockInfo *FlashSwitchBlock(tFlashBlockInfo *block, blt_addr base_addr);
|
|
static blt_bool FlashAddToBlock(tFlashBlockInfo *block, blt_addr address,
|
|
blt_int8u *data, blt_int16u len);
|
|
static blt_bool FlashWriteBlock(tFlashBlockInfo *block);
|
|
static blt_bool FlashEraseSectors(blt_int8u first_sector, blt_int8u last_sector);
|
|
static blt_int8u FlashGetSector(blt_addr address);
|
|
|
|
|
|
/****************************************************************************************
|
|
* Local constant declarations
|
|
****************************************************************************************/
|
|
/* The current flash layout supports the NXP LPC21xx and LPC22xx targets. LPC23xx have
|
|
* a slightly different layout. To support the LPC23xx, simply update this flash layout.
|
|
*/
|
|
static const tFlashSector flashLayout[] =
|
|
{
|
|
#if (BOOT_NVM_SIZE_KB == 64)
|
|
/* { 0x00000000, 0x02000, 0}, flash sector 0 - reserved for bootloader */
|
|
{ 0x00002000, 0x02000, 1}, /* flash sector 1 */
|
|
{ 0x00004000, 0x02000, 2}, /* flash sector 2 */
|
|
{ 0x00006000, 0x02000, 3}, /* flash sector 3 */
|
|
{ 0x00008000, 0x02000, 4}, /* flash sector 4 */
|
|
{ 0x0000A000, 0x02000, 5}, /* flash sector 5 */
|
|
{ 0x0000C000, 0x02000, 6}, /* flash sector 6 */
|
|
/* { 0x0000E000, 0x02000, 7}, flash sector 7 - used by NXP bootcode */
|
|
#endif
|
|
#if (BOOT_NVM_SIZE_KB == 128)
|
|
/* { 0x00000000, 0x02000, 0}, flash sector 0 - reserved for bootloader */
|
|
{ 0x00002000, 0x02000, 1}, /* flash sector 1 */
|
|
{ 0x00004000, 0x02000, 2}, /* flash sector 2 */
|
|
{ 0x00006000, 0x02000, 3}, /* flash sector 3 */
|
|
{ 0x00008000, 0x02000, 4}, /* flash sector 4 */
|
|
{ 0x0000A000, 0x02000, 5}, /* flash sector 5 */
|
|
{ 0x0000C000, 0x02000, 6}, /* flash sector 6 */
|
|
{ 0x0000E000, 0x02000, 7}, /* flash sector 7 */
|
|
{ 0x00010000, 0x02000, 8}, /* flash sector 8 */
|
|
{ 0x00012000, 0x02000, 9}, /* flash sector 9 */
|
|
{ 0x00014000, 0x02000, 10}, /* flash sector 10 */
|
|
{ 0x00016000, 0x02000, 11}, /* flash sector 11 */
|
|
{ 0x00018000, 0x02000, 12}, /* flash sector 12 */
|
|
{ 0x0001A000, 0x02000, 13}, /* flash sector 13 */
|
|
{ 0x0001C000, 0x02000, 14}, /* flash sector 14 */
|
|
/* { 0x0001E000, 0x02000, 15}, flash sector 15 - used by NXP bootcode */
|
|
#endif
|
|
#if (BOOT_NVM_SIZE_KB == 256)
|
|
/* { 0x00000000, 0x02000, 0}, flash sector 0 - reserved for bootloader */
|
|
{ 0x00002000, 0x02000, 1}, /* flash sector 1 */
|
|
{ 0x00004000, 0x02000, 2}, /* flash sector 2 */
|
|
{ 0x00006000, 0x02000, 3}, /* flash sector 3 */
|
|
{ 0x00008000, 0x02000, 4}, /* flash sector 4 */
|
|
{ 0x0000A000, 0x02000, 5}, /* flash sector 5 */
|
|
{ 0x0000C000, 0x02000, 6}, /* flash sector 6 */
|
|
{ 0x0000E000, 0x02000, 7}, /* flash sector 7 */
|
|
{ 0x00010000, 0x10000, 8}, /* flash sector 8 */
|
|
{ 0x00020000, 0x10000, 9}, /* flash sector 9 */
|
|
{ 0x00030000, 0x02000, 10}, /* flash sector 10 */
|
|
{ 0x00032000, 0x02000, 11}, /* flash sector 11 */
|
|
{ 0x00034000, 0x02000, 12}, /* flash sector 12 */
|
|
{ 0x00036000, 0x02000, 13}, /* flash sector 13 */
|
|
{ 0x00038000, 0x02000, 14}, /* flash sector 14 */
|
|
{ 0x0003A000, 0x02000, 15}, /* flash sector 15 */
|
|
{ 0x0003C000, 0x02000, 16}, /* flash sector 16 */
|
|
/* { 0x0003E000, 0x02000, 17}, flash sector 17 - used by NXP bootcode */
|
|
#endif
|
|
};
|
|
|
|
|
|
/****************************************************************************************
|
|
* Local data declarations
|
|
****************************************************************************************/
|
|
/* The smallest amount of flash that can be programmed is FLASH_WRITE_BLOCK_SIZE. A flash
|
|
* block manager is implemented in this driver and stores info in this variable. Whenever
|
|
* new data should be flashed, it is first added to a RAM buffer, which is part of this
|
|
* variable. Whenever the RAM buffer, which has the size of a flash block, is full or
|
|
* data needs to be written to a different block, the contents of the RAM buffer are
|
|
* programmed to flash. The flash block manager requires some software overhead, yet
|
|
* results is faster flash programming because data is first harvested, ideally until
|
|
* there is enough to program an entire flash block, before the flash device is actually
|
|
* operated on.
|
|
*/
|
|
static tFlashBlockInfo blockInfo;
|
|
|
|
/* The first block of the user program holds the vector table, which on the LPC2000 is
|
|
* also the where the checksum is written to. Is it likely that the vector table is
|
|
* first flashed and then, at the end of the programming sequence, the checksum. This
|
|
* means that this flash block need to be written to twice. Normally this is not a
|
|
* problem with flash memory, as long as you write the same values to those bytes that
|
|
* are not supposed to be changed and the locations where you do write to are still in
|
|
* the erased 0xFF state. Unfortunately, writing twice to flash this way, does not work
|
|
* reliably on the LPC2000. This is why we need to have an extra block, the bootblock,
|
|
* placed under the management of the block manager. This way is it possible to implement
|
|
* functionality so that the bootblock is only written to once at the end of the
|
|
* programming sequency.
|
|
*/
|
|
static tFlashBlockInfo bootBlockInfo;
|
|
|
|
|
|
/****************************************************************************************
|
|
** NAME: FlashInit
|
|
** PARAMETER: none
|
|
** RETURN VALUE: none
|
|
** DESCRIPTION: Initializes the flash driver.
|
|
**
|
|
****************************************************************************************/
|
|
void FlashInit(void)
|
|
{
|
|
/* check the flash block data buffer alignments */
|
|
if ((((blt_addr)blockInfo.data % 4) != 0) || (((blt_addr)bootBlockInfo.data % 4) != 0))
|
|
{
|
|
/* incorrect alignment */
|
|
ASSERT_RT(BLT_FALSE);
|
|
}
|
|
/* init the flash block info structs by setting the address to an invalid address */
|
|
blockInfo.base_addr = FLASH_INVALID_ADDRESS;
|
|
bootBlockInfo.base_addr = FLASH_INVALID_ADDRESS;
|
|
} /*** end of FlashInit ***/
|
|
|
|
|
|
/****************************************************************************************
|
|
** NAME: FlashWrite
|
|
** PARAMETER: addr start address
|
|
** len length in bytes
|
|
** data pointer to the data buffer.
|
|
** RETURN VALUE: BLT_TRUE if successful, BLT_FALSE otherwise.
|
|
** DESCRIPTION: Writes the data to flash through a flash block manager. Note that this
|
|
** function also checks that no data is programmed outside the flash
|
|
** memory region, so the bootloader can never be overwritten.
|
|
**
|
|
****************************************************************************************/
|
|
blt_bool FlashWrite(blt_addr addr, blt_int32u len, blt_int8u *data)
|
|
{
|
|
blt_addr base_addr;
|
|
|
|
/* make sure the addresses are within the flash device */
|
|
if ( (FlashGetSector(addr) == FLASH_INVALID_SECTOR) || \
|
|
(FlashGetSector(addr+len-1) == FLASH_INVALID_SECTOR) )
|
|
{
|
|
return BLT_FALSE;
|
|
}
|
|
|
|
/* if this is the bootblock, then let the boot block manager handle it */
|
|
base_addr = (addr/FLASH_WRITE_BLOCK_SIZE)*FLASH_WRITE_BLOCK_SIZE;
|
|
if (base_addr == flashLayout[0].sector_start)
|
|
{
|
|
/* let the boot block manager handle it */
|
|
return FlashAddToBlock(&bootBlockInfo, addr, data, len);
|
|
}
|
|
/* let the block manager handle it */
|
|
return FlashAddToBlock(&blockInfo, addr, data, len);
|
|
} /*** end of FlashWrite ***/
|
|
|
|
|
|
/****************************************************************************************
|
|
** NAME: FlashErase
|
|
** PARAMETER: addr start address
|
|
** len length in bytes
|
|
** RETURN VALUE: BLT_TRUE if successful, BLT_FALSE otherwise.
|
|
** DESCRIPTION: Erases the flash memory. Note that this function also checks that no
|
|
** data is erased outside the flash memory region, so the bootloader can
|
|
** never be erased.
|
|
**
|
|
****************************************************************************************/
|
|
blt_bool FlashErase(blt_addr addr, blt_int32u len)
|
|
{
|
|
blt_int8u first_sector;
|
|
blt_int8u last_sector;
|
|
|
|
/* obtain the first and last sector number */
|
|
first_sector = FlashGetSector(addr);
|
|
last_sector = FlashGetSector(addr+len-1);
|
|
/* check them */
|
|
if ( (first_sector == FLASH_INVALID_SECTOR) || (last_sector == FLASH_INVALID_SECTOR) )
|
|
{
|
|
return BLT_FALSE;
|
|
}
|
|
/* erase the sectors */
|
|
return FlashEraseSectors(first_sector, last_sector);
|
|
} /*** end of FlashErase ***/
|
|
|
|
|
|
/****************************************************************************************
|
|
** NAME: FlashWriteChecksum
|
|
** PARAMETER: none
|
|
** RETURN VALUE: BLT_TRUE is successful, BTL_FALSE otherwise.
|
|
** DESCRIPTION: Writes a checksum of the user program to non-volatile memory. This is
|
|
** performed once the entire user program has been programmed. Through
|
|
** the checksum, the bootloader can check if the programming session
|
|
** was completed, which indicates that a valid user programming is
|
|
** present and can be started.
|
|
**
|
|
****************************************************************************************/
|
|
blt_bool FlashWriteChecksum(void)
|
|
{
|
|
blt_int32u signature_checksum = 0;
|
|
|
|
/* The ARM7 core already has a spot reserved for a checksum that the bootloader can
|
|
* store at the end of a programming session. In order for the bootloader to be able
|
|
* to program the checksum, it is important that address 0x******14, which is reserved
|
|
* for the checksum, is set to 0xffffffff in the user program.
|
|
*
|
|
* Layout of the vector table (* = don't care)
|
|
* 0x******00 Reset Exception
|
|
* 0x******04 Undefined Instruction Exception
|
|
* 0x******08 Software Interrupt Exception
|
|
* 0x******0C Prefetch Exception
|
|
* 0x******10 Abort Exception
|
|
* 0x******14 [reserved for signature checksum]
|
|
* 0x******18 IRQ Exception
|
|
* 0x******1C FIQ Exception
|
|
*
|
|
* signature_checksum = Two's complement of (SUM(exception address values))
|
|
*/
|
|
|
|
/* compute the checksum. note that the user program's vectors are not yet written
|
|
* to flash but are present in the bootblock data structure at this point.
|
|
*/
|
|
signature_checksum += *((blt_int32u*)(&bootBlockInfo.data[0+0x00]));
|
|
signature_checksum += *((blt_int32u*)(&bootBlockInfo.data[0+0x04]));
|
|
signature_checksum += *((blt_int32u*)(&bootBlockInfo.data[0+0x08]));
|
|
signature_checksum += *((blt_int32u*)(&bootBlockInfo.data[0+0x0C]));
|
|
signature_checksum += *((blt_int32u*)(&bootBlockInfo.data[0+0x10]));
|
|
signature_checksum += *((blt_int32u*)(&bootBlockInfo.data[0+0x18]));
|
|
signature_checksum += *((blt_int32u*)(&bootBlockInfo.data[0+0x1C]));
|
|
signature_checksum = ~signature_checksum; /* one's complement */
|
|
signature_checksum += 1; /* two's complement */
|
|
|
|
/* write the checksum */
|
|
return FlashWrite(flashLayout[0].sector_start+0x14, sizeof(blt_addr),
|
|
(blt_int8u*)&signature_checksum);
|
|
} /*** end of FlashWriteChecksum ***/
|
|
|
|
|
|
/****************************************************************************************
|
|
** NAME: FlashVerifyChecksum
|
|
** PARAMETER: none
|
|
** RETURN VALUE: BLT_TRUE is successful, BTL_FALSE otherwise.
|
|
** DESCRIPTION: Verifies the checksum, which indicates that a valid user program is
|
|
** present and can be started.
|
|
**
|
|
****************************************************************************************/
|
|
blt_bool FlashVerifyChecksum(void)
|
|
{
|
|
blt_int32u signature_checksum = 0;
|
|
|
|
/* verify the checksum based on how it was written by CpuWriteChecksum() */
|
|
signature_checksum += *((blt_int32u*)(flashLayout[0].sector_start));
|
|
signature_checksum += *((blt_int32u*)(flashLayout[0].sector_start+0x04));
|
|
signature_checksum += *((blt_int32u*)(flashLayout[0].sector_start+0x08));
|
|
signature_checksum += *((blt_int32u*)(flashLayout[0].sector_start+0x0C));
|
|
signature_checksum += *((blt_int32u*)(flashLayout[0].sector_start+0x10));
|
|
signature_checksum += *((blt_int32u*)(flashLayout[0].sector_start+0x14));
|
|
signature_checksum += *((blt_int32u*)(flashLayout[0].sector_start+0x18));
|
|
signature_checksum += *((blt_int32u*)(flashLayout[0].sector_start+0x1C));
|
|
|
|
/* sum should add up to an unsigned 32-bit value of 0 */
|
|
if (signature_checksum == 0)
|
|
{
|
|
/* checksum okay */
|
|
return BLT_TRUE;
|
|
}
|
|
/* checksum incorrect */
|
|
return BLT_FALSE;
|
|
} /*** end of FlashVerifyChecksum ***/
|
|
|
|
|
|
/****************************************************************************************
|
|
** NAME: FlashDone
|
|
** PARAMETER: none
|
|
** RETURN VALUE: BLT_TRUE is succesful, BLT_FALSE otherwise.
|
|
** DESCRIPTION: Finilizes the flash driver operations. There could still be data in
|
|
** the currently active block that needs to be flashed.
|
|
**
|
|
****************************************************************************************/
|
|
blt_bool FlashDone(void)
|
|
{
|
|
/* check if there is still data waiting to be programmed in the boot block */
|
|
if (bootBlockInfo.base_addr != FLASH_INVALID_ADDRESS)
|
|
{
|
|
if (FlashWriteBlock(&bootBlockInfo) == BLT_FALSE)
|
|
{
|
|
return BLT_FALSE;
|
|
}
|
|
}
|
|
|
|
/* check if there is still data waiting to be programmed */
|
|
if (blockInfo.base_addr != FLASH_INVALID_ADDRESS)
|
|
{
|
|
if (FlashWriteBlock(&blockInfo) == BLT_FALSE)
|
|
{
|
|
return BLT_FALSE;
|
|
}
|
|
}
|
|
/* still here so all is okay */
|
|
return BLT_TRUE;
|
|
} /*** end of FlashDone ***/
|
|
|
|
|
|
/****************************************************************************************
|
|
** NAME: FlashInitBlock
|
|
** PARAMETER: block pointer to flash block info structure to operate on.
|
|
** address base address of the block data.
|
|
** RETURN VALUE: BLT_TRUE is succesful, BLT_FALSE otherwise.
|
|
** DESCRIPTION: Copies data currently in flash to the block->data and sets the
|
|
** base address.
|
|
**
|
|
****************************************************************************************/
|
|
static blt_bool FlashInitBlock(tFlashBlockInfo *block, blt_addr address)
|
|
{
|
|
/* check address alignment */
|
|
if ((address % FLASH_WRITE_BLOCK_SIZE) != 0)
|
|
{
|
|
return BLT_FALSE;
|
|
}
|
|
/* make sure that we are initializing a new block and not the same one */
|
|
if (block->base_addr == address)
|
|
{
|
|
/* block already initialized, so nothing to do */
|
|
return BLT_TRUE;
|
|
}
|
|
/* set the base address and copies the current data from flash */
|
|
block->base_addr = address;
|
|
CpuMemCopy((blt_addr)block->data, address, FLASH_WRITE_BLOCK_SIZE);
|
|
return BLT_TRUE;
|
|
} /*** end of FlashInitBlock ***/
|
|
|
|
|
|
/****************************************************************************************
|
|
** NAME: FlashSwitchBlock
|
|
** PARAMETER: block pointer to flash block info structure to operate on.
|
|
** base_addr base address for the next block
|
|
** RETURN VALUE: the pointer of the block info struct that is no being used, or a NULL
|
|
** pointer in case of error.
|
|
** DESCRIPTION: Switches blocks by programming the current one and initializing the
|
|
** next.
|
|
**
|
|
****************************************************************************************/
|
|
static tFlashBlockInfo *FlashSwitchBlock(tFlashBlockInfo *block, blt_addr base_addr)
|
|
{
|
|
/* check if a switch needs to be made away from the boot block. in this case the boot
|
|
* block shouldn't be written yet, because this is done at the end of the programming
|
|
* session by FlashDone(), this is right after the checksum was written.
|
|
*/
|
|
if (block == &bootBlockInfo)
|
|
{
|
|
/* switch from the boot block to the generic block info structure */
|
|
block = &blockInfo;
|
|
}
|
|
/* check if a switch back into the bootblock is needed. in this case the generic block
|
|
* doesn't need to be written here yet.
|
|
*/
|
|
else if (base_addr == flashLayout[0].sector_start)
|
|
{
|
|
/* switch from the generic block to the boot block info structure */
|
|
block = &bootBlockInfo;
|
|
base_addr = flashLayout[0].sector_start;
|
|
}
|
|
else
|
|
{
|
|
/* need to switch to a new block, so program the current one and init the next */
|
|
if (FlashWriteBlock(block) == BLT_FALSE)
|
|
{
|
|
return BLT_NULL;
|
|
}
|
|
}
|
|
|
|
/* initialize tne new block when necessary */
|
|
if (FlashInitBlock(block, base_addr) == BLT_FALSE)
|
|
{
|
|
return BLT_NULL;
|
|
}
|
|
|
|
/* still here to all is okay */
|
|
return block;
|
|
} /*** end of FlashSwitchBlock ***/
|
|
|
|
|
|
/****************************************************************************************
|
|
** NAME: FlashAddToBlock
|
|
** PARAMETER: block pointer to flash block info structure to operate on.
|
|
** address flash destination address
|
|
** data pointer to the byte array with data
|
|
** len number of bytes to add to the block
|
|
** RETURN VALUE: BLT_TRUE if successful, BLT_FALSE otherwise.
|
|
** DESCRIPTION: Programming is done per block. This function adds data to the block
|
|
** that is currently collecting data to be written to flash. If the
|
|
** address is outside of the current block, the current block is written
|
|
** to flash an a new block is initialized.
|
|
**
|
|
****************************************************************************************/
|
|
static blt_bool FlashAddToBlock(tFlashBlockInfo *block, blt_addr address,
|
|
blt_int8u *data, blt_int16u len)
|
|
{
|
|
blt_addr current_base_addr;
|
|
blt_int8u *dst;
|
|
blt_int8u *src;
|
|
|
|
/* determine the current base address */
|
|
current_base_addr = (address/FLASH_WRITE_BLOCK_SIZE)*FLASH_WRITE_BLOCK_SIZE;
|
|
|
|
/* make sure the blockInfo is not uninitialized */
|
|
if (block->base_addr == FLASH_INVALID_ADDRESS)
|
|
{
|
|
/* initialize the blockInfo struct for the current block */
|
|
if (FlashInitBlock(block, current_base_addr) == BLT_FALSE)
|
|
{
|
|
return BLT_FALSE;
|
|
}
|
|
}
|
|
|
|
/* check if the new data fits in the current block */
|
|
if (block->base_addr != current_base_addr)
|
|
{
|
|
/* need to switch to a new block, so program the current one and init the next */
|
|
block = FlashSwitchBlock(block, current_base_addr);
|
|
if (block == BLT_NULL)
|
|
{
|
|
return BLT_FALSE;
|
|
}
|
|
}
|
|
|
|
/* add the data to the current block, but check for block overflow */
|
|
dst = &(block->data[address - block->base_addr]);
|
|
src = data;
|
|
do
|
|
{
|
|
/* keep the watchdog happy */
|
|
CopService();
|
|
/* buffer overflow? */
|
|
if ((blt_addr)(dst-&(block->data[0])) >= FLASH_WRITE_BLOCK_SIZE)
|
|
{
|
|
/* need to switch to a new block, so program the current one and init the next */
|
|
block = FlashSwitchBlock(block, current_base_addr+FLASH_WRITE_BLOCK_SIZE);
|
|
if (block == BLT_NULL)
|
|
{
|
|
return BLT_FALSE;
|
|
}
|
|
/* reset destination pointer */
|
|
dst = &(block->data[0]);
|
|
}
|
|
/* write the data to the buffer */
|
|
*dst = *src;
|
|
/* update pointers */
|
|
dst++;
|
|
src++;
|
|
/* decrement byte counter */
|
|
len--;
|
|
}
|
|
while (len > 0);
|
|
/* still here so all is good */
|
|
return BLT_TRUE;
|
|
} /*** end of FlashAddToBlock ***/
|
|
|
|
|
|
/****************************************************************************************
|
|
** NAME: FlashWriteBlock
|
|
** PARAMETER: block pointer to flash block info structure to operate on.
|
|
** RETURN VALUE: BLT_TRUE if successful, BLT_FALSE otherwise.
|
|
** DESCRIPTION: Programs FLASH_WRITE_BLOCK_SIZE bytes to flash from the block->data
|
|
** array.
|
|
**
|
|
****************************************************************************************/
|
|
static blt_bool FlashWriteBlock(tFlashBlockInfo *block)
|
|
{
|
|
blt_int32u iap_command[5];
|
|
blt_int32u iap_result[3];
|
|
blt_int8u sector_num;
|
|
pIapHandler iapHandler = (void *)IAP_ENTRY_ADDRESS;
|
|
|
|
/* check that address is actually within flash */
|
|
sector_num = FlashGetSector(block->base_addr);
|
|
if (sector_num == FLASH_INVALID_SECTOR)
|
|
{
|
|
return BLT_FALSE;
|
|
}
|
|
/* send the prepare sector command for just this one sector */
|
|
iap_command[0] = IAP_CMD_PREPARE_SECTORS;
|
|
iap_command[1] = sector_num;
|
|
iap_command[2] = sector_num;
|
|
iap_result[0] = !IAP_CMD_SUCCESS;
|
|
/* service the watchdog before calling the IAP handler */
|
|
CopService();
|
|
iapHandler(iap_command, iap_result);
|
|
if (iap_result[0] != IAP_CMD_SUCCESS)
|
|
{
|
|
return BLT_FALSE;
|
|
}
|
|
/* send the erase sector command */
|
|
iap_command[0] = IAP_CMD_COPY_RAM_TO_FLASH;
|
|
iap_command[1] = (blt_int32u)block->base_addr;
|
|
iap_command[2] = (blt_int32u)block->data;
|
|
iap_command[3] = FLASH_WRITE_BLOCK_SIZE;
|
|
iap_command[4] = BOOT_CPU_SYSTEM_SPEED_KHZ;
|
|
iap_result[0] = !IAP_CMD_SUCCESS;
|
|
/* service the watchdog before calling the IAP handler */
|
|
CopService();
|
|
iapHandler(iap_command, iap_result);
|
|
if (iap_result[0] != IAP_CMD_SUCCESS)
|
|
{
|
|
return BLT_FALSE;
|
|
}
|
|
/* perform a comparison for verification purposes */
|
|
iap_command[0] = IAP_CMD_COMPARE;
|
|
iap_command[1] = (blt_int32u)block->base_addr;
|
|
iap_command[2] = (blt_int32u)block->data;
|
|
iap_command[3] = FLASH_WRITE_BLOCK_SIZE;
|
|
iap_result[0] = !IAP_CMD_SUCCESS;
|
|
/* service the watchdog before calling the IAP handler */
|
|
CopService();
|
|
iapHandler(iap_command, iap_result);
|
|
if (iap_result[0] != IAP_CMD_SUCCESS)
|
|
{
|
|
return BLT_FALSE;
|
|
}
|
|
/* still here so all is okay */
|
|
return BLT_TRUE;
|
|
|
|
} /*** end of FlashWriteBlock ***/
|
|
|
|
|
|
/****************************************************************************************
|
|
** NAME: FlashEraseSectors
|
|
** PARAMETER: first_sector first flash sector number
|
|
** last_sector last flash sector number
|
|
** RETURN VALUE: BLT_TRUE if successful, BLT_FALSE otherwise.
|
|
** DESCRIPTION: Erases the flash sectors from first_sector up until last_sector
|
|
**
|
|
****************************************************************************************/
|
|
static blt_bool FlashEraseSectors(blt_int8u first_sector, blt_int8u last_sector)
|
|
{
|
|
blt_int32u iap_command[5];
|
|
blt_int32u iap_result[3];
|
|
pIapHandler iapHandler = (void *)IAP_ENTRY_ADDRESS;
|
|
|
|
/* validate the sector numbers */
|
|
if (first_sector > last_sector)
|
|
{
|
|
return BLT_FALSE;
|
|
}
|
|
if ( (first_sector < flashLayout[0].sector_num) || \
|
|
(last_sector > flashLayout[FLASH_TOTAL_SECTORS-1].sector_num) )
|
|
{
|
|
return BLT_FALSE;
|
|
}
|
|
|
|
/* send the prepare sector command for just this one sector */
|
|
iap_command[0] = IAP_CMD_PREPARE_SECTORS;
|
|
iap_command[1] = first_sector;
|
|
iap_command[2] = last_sector;
|
|
iap_result[0] = !IAP_CMD_SUCCESS;
|
|
/* service the watchdog before calling the IAP handler */
|
|
CopService();
|
|
iapHandler(iap_command, iap_result);
|
|
if (iap_result[0] != IAP_CMD_SUCCESS)
|
|
{
|
|
return BLT_FALSE;
|
|
}
|
|
/* send the erase sector command */
|
|
iap_command[0] = IAP_CMD_ERASE_SECTORS;
|
|
iap_command[1] = first_sector;
|
|
iap_command[2] = last_sector;
|
|
iap_command[3] = BOOT_CPU_SYSTEM_SPEED_KHZ;
|
|
iap_result[0] = !IAP_CMD_SUCCESS;
|
|
/* service the watchdog before calling the IAP handler */
|
|
CopService();
|
|
iapHandler(iap_command, iap_result);
|
|
if (iap_result[0] != IAP_CMD_SUCCESS)
|
|
{
|
|
return BLT_FALSE;
|
|
}
|
|
/* perform a blank check for verification purposes */
|
|
iap_command[0] = IAP_CMD_BLANK_CHECK_SECTORS ;
|
|
iap_command[1] = first_sector;
|
|
iap_command[2] = last_sector;
|
|
iap_result[0] = !IAP_CMD_SUCCESS;
|
|
/* service the watchdog before calling the IAP handler */
|
|
CopService();
|
|
iapHandler(iap_command, iap_result);
|
|
if (iap_result[0] != IAP_CMD_SUCCESS)
|
|
{
|
|
return BLT_FALSE;
|
|
}
|
|
/* still here so all went okay */
|
|
return BLT_TRUE;
|
|
} /*** end of FlashEraseSectors ***/
|
|
|
|
|
|
/****************************************************************************************
|
|
** NAME: FlashGetSector
|
|
** PARAMETER: address address in the flash sector
|
|
** RETURN VALUE: flash sector number or FLASH_INVALID_SECTOR
|
|
** DESCRIPTION: Determines the flash sector the address is in.
|
|
**
|
|
****************************************************************************************/
|
|
static blt_int8u FlashGetSector(blt_addr address)
|
|
{
|
|
blt_int8u sectorIdx;
|
|
|
|
/* search through the sectors to find the right one */
|
|
for (sectorIdx = 0; sectorIdx < FLASH_TOTAL_SECTORS; sectorIdx++)
|
|
{
|
|
/* keep the watchdog happy */
|
|
CopService();
|
|
/* is the address in this sector? */
|
|
if ( (address >= flashLayout[sectorIdx].sector_start) && \
|
|
(address < (flashLayout[sectorIdx].sector_start + \
|
|
flashLayout[sectorIdx].sector_size)) )
|
|
{
|
|
/* return the sector number */
|
|
return flashLayout[sectorIdx].sector_num;
|
|
}
|
|
}
|
|
/* still here so no valid sector found */
|
|
return FLASH_INVALID_SECTOR;
|
|
} /*** end of FlashGetSector ***/
|
|
|
|
|
|
/*********************************** end of flash.c ************************************/
|