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arm:make no assumptions about TRE and AFE

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The bootloader can leave the system control register
in at state that doesn't match our setup. make no assumptions
and configure TRE and AFE.
This commit is contained in:
Kees Jongenburger 2013-05-16 09:50:55 +02:00 committed by Kees Jongenburger
parent 84eeb1e681
commit b9cb8251bc
1 changed files with 5 additions and 0 deletions
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5
kernel/arch/earm/pg_utils.c
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@ -159,6 +159,7 @@ void pg_identity(kinfo_t *cbi)
for(i = 0; i < ARM_VM_DIR_ENTRIES; i++) {
u32_t flags = ARM_VM_SECTION
| ARM_VM_SECTION_USER
| ARM_VM_SECTION_DEVICE
| ARM_VM_SECTION_DOMAIN;
phys = i * ARM_SECTION_SIZE;
pagedir[i] = phys | flags;
@ -201,6 +202,10 @@ void vm_enable_paging(void)
/* AFE set to zero (default reset value): not using simplified model. */
/* TRE set to zero (default reset value): TEX[2:0] are used, plus C and B bits.*/
sctlr &= ~SCTLR_TRE;
/* AFE set to zero (default reset value): not using simplified model. */
sctlr &= ~SCTLR_AFE;
/* Enable instruction and data cache */
sctlr |= SCTLR_C;