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Merge pull request #213 from gsmcmullin/k22f_security_hack 

K22F security hack
This commit is contained in:
Gareth McMullin 2017-04-21 13:29:48 +12:00 committed by GitHub
parent 06bf37fe20 633662dbb3
commit 2f5295ba14
2 changed files with 21 additions and 0 deletions
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1
src/platforms/native/platform.c
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@ -176,6 +176,7 @@ void platform_init(void)
void platform_srst_set_val(bool assert) void platform_srst_set_val(bool assert)
{ {
gpio_set_val(TMS_PORT, TMS_PIN, 1);
if ((platform_hwversion() == 0) || if ((platform_hwversion() == 0) ||
(platform_hwversion() >= 3)) { (platform_hwversion() >= 3)) {
gpio_set_val(SRST_PORT, SRST_PIN, assert); gpio_set_val(SRST_PORT, SRST_PIN, assert);

20
src/target/kinetis.c
View File

@ -82,6 +82,7 @@ static bool kinetis_cmd_unsafe(target *t, int argc, char *argv[])
static int kl_gen_flash_erase(struct target_flash *f, target_addr addr, size_t len); static int kl_gen_flash_erase(struct target_flash *f, target_addr addr, size_t len);
static int kl_gen_flash_write(struct target_flash *f, static int kl_gen_flash_write(struct target_flash *f,
target_addr dest, const void *src, size_t len); target_addr dest, const void *src, size_t len);
static int kl_gen_flash_done(struct target_flash *f);
static void kl_gen_add_flash(target *t, static void kl_gen_add_flash(target *t,
uint32_t addr, size_t length, size_t erasesize) uint32_t addr, size_t length, size_t erasesize)
@ -92,6 +93,7 @@ static void kl_gen_add_flash(target *t,
f->blocksize = erasesize; f->blocksize = erasesize;
f->erase = kl_gen_flash_erase; f->erase = kl_gen_flash_erase;
f->write = kl_gen_flash_write; f->write = kl_gen_flash_write;
f->done = kl_gen_flash_done;
f->align = 4; f->align = 4;
f->erased = 0xff; f->erased = 0xff;
target_add_flash(t, f); target_add_flash(t, f);
@ -233,6 +235,24 @@ static int kl_gen_flash_write(struct target_flash *f,
return 0; return 0;
} }
static int kl_gen_flash_done(struct target_flash *f)
{
if (unsafe_enabled)
return 0;
if (target_mem_read8(f->t, FLASH_SECURITY_BYTE_ADDRESS) ==
FLASH_SECURITY_BYTE_UNSECURED)
return 0;
uint32_t val = target_mem_read32(f->t, FLASH_SECURITY_BYTE_ADDRESS);
val = (val & 0xffffff00) | FLASH_SECURITY_BYTE_UNSECURED;
kl_gen_command(f->t, FTFA_CMD_PROGRAM_LONGWORD,
FLASH_SECURITY_BYTE_ADDRESS, (uint8_t*)&val);
return 0;
}
/*** Kinetis recovery mode using the MDM-AP ***/ /*** Kinetis recovery mode using the MDM-AP ***/
/* Kinetis security bits are stored in regular flash, so it is possible /* Kinetis security bits are stored in regular flash, so it is possible