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flash/nor: Add erased_value to drivers and pass it to targets

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struct flash_driver has a default_padded_value field that is similar,
but it can be changed by the user for the specific purpose of padding.

Add a new erased_value field and initialize it for all targets,
particularly stm32lx, xmc4xxx and virtual.

Use this value in core.c:default_flash_mem_blank_check(), the slow path.

Extend the target API to pass erased_value down to target code.
Adding an argument ensures that we catch all callers.

This allows us to merge xmc4xxx.c:xmc4xxx_blank_check_memory() into
armv7m:armv7m_blank_check_memory().

It further allows us to use default_flash_blank_check() in place of
xmc4xxx.c:xmc4xxx_flash_blank_check(), adding a potential slow path
fallback, as well as stm32lx:stm32lx_erase_check(), adding the potential
armv7m fast path with fallback to default_flash_mem_blank_check().

Fix a mips32 code comment while at it (zeroed -> erased).

The armv4_5 and mips32 target implementations will now error out if an
erase value other than 0xff is used, causing default_flash_blank_check()
to fall back to the default_flank_mem_blank_check() slow path.

Change-Id: I39323fbbc4b71c256cd567e439896d0245d4745f
Signed-off-by: Andreas Färber <afaerber@suse.de>
Reviewed-on: http://openocd.zylin.com/3497
Tested-by: jenkins
Reviewed-by: Tomas Vanek <vanekt@fbl.cz>
This commit is contained in:
Andreas Färber
2016-05-08 23:49:07 +02:00
committed by Andreas Fritiofson
parent b9ee6dd465
commit eaacb900dd
16 changed files with 61 additions and 171 deletions
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12
src/target/mips32.c
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@@ -771,9 +771,9 @@ int mips32_checksum_memory(struct target *target, uint32_t address,
return retval;
}
/** Checks whether a memory region is zeroed. */
/** Checks whether a memory region is erased. */
int mips32_blank_check_memory(struct target *target,
uint32_t address, uint32_t count, uint32_t *blank)
uint32_t address, uint32_t count, uint32_t *blank, uint8_t erased_value)
{
struct working_area *erase_check_algorithm;
struct reg_param reg_params[3];
@@ -789,6 +789,12 @@ int mips32_blank_check_memory(struct target *target,
0x7000003F /* sdbbp */
};
if (erased_value != 0xff) {
LOG_ERROR("Erase value 0x%02" PRIx8 " not yet supported for MIPS32",
erased_value);
return ERROR_FAIL;
}
/* make sure we have a working area */
if (target_alloc_working_area(target, sizeof(erase_check_code), &erase_check_algorithm) != ERROR_OK)
return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
@@ -810,7 +816,7 @@ int mips32_blank_check_memory(struct target *target,
buf_set_u32(reg_params[1].value, 0, 32, count);
init_reg_param(&reg_params[2], "r6", 32, PARAM_IN_OUT);
buf_set_u32(reg_params[2].value, 0, 32, 0xff);
buf_set_u32(reg_params[2].value, 0, 32, erased_value);
int retval = target_run_algorithm(target, 0, NULL, 3, reg_params,
erase_check_algorithm->address,