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bsps/aarch64: Enable MMU during remaps

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The MMU must be enabled during mapping changes and TLB invalidations.
When this is not the case, TLB updates do not occur correctly in all
cases. This is especially apparent when changing a block entry to a
table entry when remapping small memory ranges in an otherwise
contiguous block.
This commit is contained in:
Kinsey Moore
2023-04-17 17:05:03 -05:00
committed by Joel Sherrill
parent 078bbbc9c8
commit 7e119562ae
1 changed files with 4 additions and 3 deletions
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7
bsps/aarch64/shared/mmu/vmsav8-64.c
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@@ -54,10 +54,12 @@ rtems_status_code aarch64_mmu_map(
return RTEMS_INVALID_ADDRESS;
}
/* Disable interrupts so they don't run while the MMU is disabled */
/*
* Disable interrupts so they don't run while the MMU tables are being
* modified.
*/
_ISR_Local_disable( level );
aarch64_mmu_disable();
sc = aarch64_mmu_map_block(
(uint64_t *) bsp_translation_table_base,
0x0,
@@ -72,7 +74,6 @@ rtems_status_code aarch64_mmu_map(
);
_AARCH64_Data_synchronization_barrier();
_AARCH64_Instruction_synchronization_barrier();
aarch64_mmu_enable();
_ISR_Local_enable( level );