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ARM NAND I/O refactor code copying. 

Created a function for copying code to the working area on
a target.  The NAND write and read functions are updated to
include use of this function.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
This commit is contained in:
Dean Glazeski 2009-11-16 12:26:21 -06:00 committed by David Brownell
parent ffc704fdeb
commit 05a5f682c6
1 changed files with 47 additions and 40 deletions
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87
src/flash/arm_nandio.c
View File

@ -28,6 +28,45 @@
#include "armv4_5.h"
#include "algorithm.h"
/**
* Copies code to a working area. This will allocate room for the code plus the
* additional amount requested if the working area pointer is null.
*
* @param target Pointer to the target to copy code to
* @param code Pointer to the code area to be copied
* @param code_size Size of the code being copied
* @param additional Size of the additional area to be allocated in addition to
* code
* @param area Pointer to a pointer to a working area to copy code to
* @return Success or failure of the operation
*/
int arm_code_to_working_area(struct target *target, const uint32_t *code, unsigned code_size,
unsigned additional, struct working_area **area)
{
uint8_t code_buf[code_size];
unsigned i;
int retval;
unsigned size = code_size + additional;
/* make sure we have a working area */
if (NULL == *area) {
retval = target_alloc_working_area(target, size, area);
if (retval != ERROR_OK) {
LOG_DEBUG("%s: no %d byte buffer", __FUNCTION__, (int) size);
return ERROR_NAND_NO_BUFFER;
}
}
/* buffer code in target endianness */
for (i = 0; i < code_size / 4; i++)
target_buffer_set_u32(target, code_buf + i * 4, code[i]);
/* copy code to work area */
retval = target_write_memory(target, (*area)->address,
4, code_size / 4, code_buf);
return retval;
}
/*
* ARM-specific bulk write from buffer to address of 8-bit wide NAND.
@ -66,30 +105,12 @@ int arm_nandwrite(struct arm_nand_data *nand, uint8_t *data, int size)
};
if (!nand->copy_area) {
uint8_t code_buf[sizeof(code)];
unsigned i;
/* make sure we have a working area */
if (target_alloc_working_area(target,
sizeof(code) + nand->chunk_size,
&nand->copy_area) != ERROR_OK) {
LOG_DEBUG("%s: no %d byte buffer",
__FUNCTION__,
(int) sizeof(code) + nand->chunk_size);
return ERROR_NAND_NO_BUFFER;
}
/* buffer code in target endianness */
for (i = 0; i < sizeof(code) / 4; i++)
target_buffer_set_u32(target, code_buf + i * 4, code[i]);
/* copy code to work area */
retval = target_write_memory(target,
nand->copy_area->address,
4, sizeof(code) / 4, code_buf);
if (retval != ERROR_OK)
retval = arm_code_to_working_area(target, code, sizeof(code),
nand->chunk_size, &nand->copy_area);
if (retval != ERROR_OK) {
return retval;
}
}
/* copy data to work area */
target_buf = nand->copy_area->address + sizeof(code);
@ -139,7 +160,8 @@ int arm_nandwrite(struct arm_nand_data *nand, uint8_t *data, int size)
* @param data Pointer to the data buffer to store the read data
* @param size Amount of data to be stored to the buffer.
*/
int arm_nandread(struct arm_nand_data *nand, uint8_t *data, uint32_t size) {
int arm_nandread(struct arm_nand_data *nand, uint8_t *data, uint32_t size)
{
struct target *target = nand->target;
struct armv4_5_algorithm algo;
struct arm *armv4_5 = target->arch_info;
@ -165,23 +187,8 @@ int arm_nandread(struct arm_nand_data *nand, uint8_t *data, uint32_t size) {
/* create the copy area if not yet available */
if (!nand->copy_area) {
uint8_t code_buf[sizeof(code)];
unsigned i;
/* make sure we have a working area */
retval = target_alloc_working_area(target, sizeof(code) + nand->chunk_size, &nand->copy_area);
if (retval != ERROR_OK) {
LOG_DEBUG("%s: no %d byte buffer", __FUNCTION__, (int) sizeof(code) + nand->chunk_size);
return ERROR_NAND_NO_BUFFER;
}
/* buffer code in target endianness */
for (i = 0; i < sizeof(code) / 4; i++) {
target_buffer_set_u32(target, code_buf + i * 4, code[i]);
}
/* copy code to work area */
retval = target_write_memory(target, nand->copy_area->address, 4, sizeof(code) / 4, code_buf);
retval = arm_code_to_working_area(target, code, sizeof(code),
nand->chunk_size, &nand->copy_area);
if (retval != ERROR_OK) {
return retval;
}