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arm:caching enable barriers

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Change-Id: I2c54a3c3c8f0502bf365901d771a989f7c556958
This commit is contained in:
Kees Jongenburger 2013-09-25 10:49:09 +02:00
parent 400e577fd5
commit d60d07f045
1 changed files with 15 additions and 2 deletions
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17
kernel/arch/earm/pg_utils.c
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@ -178,7 +178,8 @@ int pg_mapkernel(void)
assert(!(kern_phys_start % ARM_SECTION_SIZE)); assert(!(kern_phys_start % ARM_SECTION_SIZE));
pde = kern_vir_start / ARM_SECTION_SIZE; /* start pde */ pde = kern_vir_start / ARM_SECTION_SIZE; /* start pde */
while(mapped < kern_kernlen) { while(mapped < kern_kernlen) {
pagedir[pde] = (kern_phys & ARM_VM_SECTION_MASK) | ARM_VM_SECTION pagedir[pde] = (kern_phys & ARM_VM_SECTION_MASK)
| ARM_VM_SECTION
| ARM_VM_SECTION_SUPER | ARM_VM_SECTION_SUPER
| ARM_VM_SECTION_DOMAIN | ARM_VM_SECTION_DOMAIN
| ARM_VM_SECTION_CACHED; | ARM_VM_SECTION_CACHED;
@ -192,6 +193,7 @@ int pg_mapkernel(void)
void vm_enable_paging(void) void vm_enable_paging(void)
{ {
u32_t sctlr; u32_t sctlr;
u32_t actlr;
write_ttbcr(0); write_ttbcr(0);
@ -209,9 +211,20 @@ void vm_enable_paging(void)
/* AFE set to zero (default reset value): not using simplified model. */ /* AFE set to zero (default reset value): not using simplified model. */
sctlr &= ~SCTLR_AFE; sctlr &= ~SCTLR_AFE;
/* Enable instruction and data cache */ /* Enable instruction ,data cache and branch prediction */
sctlr |= SCTLR_C; sctlr |= SCTLR_C;
sctlr |= SCTLR_I; sctlr |= SCTLR_I;
sctlr |= SCTLR_Z;
/* Enable barriers */
sctlr |= SCTLR_CP15BEN;
/* Enable L2 cache (cortex-a8) */
#define CORTEX_A8_L2EN (0x02)
actlr = read_actlr();
actlr |= CORTEX_A8_L2EN;
write_actlr(actlr);
write_sctlr(sctlr); write_sctlr(sctlr);
} }