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bsps/aarch64: Disable use of TTBR1

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Force use of addresses that would be translated by TTBR1 to cause a
translation fault. RTEMS on AArch64 does not use TTBR1 and so attempted
translation of that address range could cause unexpected behavior in the
form of other exception types since TTBR1 is never set.
This commit is contained in:
Tian Ye
2023-10-18 09:21:56 -05:00
committed by Joel Sherrill
parent e7cb79c39d
commit a738d69bcf
1 changed files with 2 additions and 1 deletions
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bsps/aarch64/include/bsp/aarch64-mmu.h
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@@ -439,7 +439,8 @@ BSP_START_TEXT_SECTION static inline void aarch64_mmu_setup( void )
_AArch64_Write_tcr_el1( _AArch64_Write_tcr_el1(
AARCH64_TCR_EL1_T0SZ( 0x10 ) | AARCH64_TCR_EL1_IRGN0( 0x1 ) | AARCH64_TCR_EL1_T0SZ( 0x10 ) | AARCH64_TCR_EL1_IRGN0( 0x1 ) |
AARCH64_TCR_EL1_ORGN0( 0x1 ) | AARCH64_TCR_EL1_SH0( 0x3 ) | AARCH64_TCR_EL1_ORGN0( 0x1 ) | AARCH64_TCR_EL1_SH0( 0x3 ) |
AARCH64_TCR_EL1_TG0( 0x0 ) | AARCH64_TCR_EL1_IPS( 0x5ULL ) AARCH64_TCR_EL1_TG0( 0x0 ) | AARCH64_TCR_EL1_IPS( 0x5ULL ) |
AARCH64_TCR_EL1_EPD1
); );
/* Set MAIR */ /* Set MAIR */