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cortex_a: fix virt2phys when mmu is disabled 

When the MMU is not enabled on debug state entry, virt2phys cannot
perform a translation since it is unknown whether a valid MMU
configuration existed before. In this case, return the virtual
address as physical address.

Change-Id: I6f85a7a5dbc200be1a4b5badf10a1a717f1c79c0
Signed-off-by: Matthias Welwarsky <matthias.welwarsky@sysgo.com>
Reviewed-on: http://openocd.zylin.com/4480
Tested-by: jenkins
Reviewed-by: Antonio Borneo <borneo.antonio@gmail.com>
Reviewed-by: Matthias Welwarsky <matthias@welwarsky.de>
bscan_tunnel
Matthias Welwarsky 2016-07-15 14:23:25 +02:00 committed by Matthias Welwarsky
parent e57f8e12da
commit ad6c71e151
1 changed files with 14 additions and 0 deletions
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14
src/target/cortex_a.c
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@ -3229,6 +3229,20 @@ static int cortex_a_virt2phys(struct target *target,
struct armv7a_common *armv7a = target_to_armv7a(target);
struct adiv5_dap *swjdp = armv7a->arm.dap;
uint8_t apsel = swjdp->apsel;
int mmu_enabled;
/*
* If the MMU was not enabled at debug entry, there is no
* way of knowing if there was ever a valid configuration
* for it and thus it's not safe to enable it. In this case,
* just return the virtual address as physical.
*/
cortex_a_mmu(target, &mmu_enabled);
if (!mmu_enabled) {
*phys = virt;
return ERROR_OK;
}
if (armv7a->memory_ap_available && (apsel == armv7a->memory_ap->ap_num)) {
uint32_t ret;
retval = armv7a_mmu_translate_va(target,