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hw: save MMU registers for TrustZone VMM (ref #954) 

When saving/resuming translation table base registers, and data fault register
a VMM is able to translate the VM's virtual addresses, and to analyse aborts
it has generated.
This commit is contained in:
Stefan Kalkowski 2013-11-14 14:59:48 +01:00 committed by Norman Feske
parent b694045bd9
commit 238430a362
1 changed files with 5 additions and 0 deletions
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5
base-hw/src/core/arm_v7/mode_transition.s
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@ -189,6 +189,10 @@
mrs r1, spsr /* spsr to r0 */
mov r2, #\exception_type /* exception reason to r1 */
stmia r0!, {r1-r2} /* save spsr, and exception reason */
mrc p15, 0, r3, c6, c0, 0 /* move DFAR to r3 */
mrc p15, 0, r4, c2, c0, 0 /* move TTBR0 to r4 */
mrc p15, 0, r5, c2, c0, 1 /* move TTBR1 to r5 */
mrc p15, 0, r6, c2, c0, 2 /* move TTBRC to r6 */
mov r1, #0
mcr p15, 0, r1, c1, c1, 0 /* disable non-secure bit */
_save_bank 27 /* save undefined banks */
@ -197,6 +201,7 @@
_save_bank 18 /* save irq banks */
_save_bank 17 /* save fiq banks */
stmia r0!, {r8-r12} /* save fiq r8-r12 */
stmia r0!, {r3-r6} /* save MMU registers */
cps #19 /* switch to supervisor mode */
adr r0, _mt_master_context_begin /* get kernel context pointer */
add r0, r0, #13*4 /* load kernel context */