diff options
Diffstat (limited to 'arch/arm/kernel/head-nommu.S')
| -rw-r--r-- | arch/arm/kernel/head-nommu.S | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/arch/arm/kernel/head-nommu.S b/arch/arm/kernel/head-nommu.S index 0d64b8ba7e9c..2e38f85b757a 100644 --- a/arch/arm/kernel/head-nommu.S +++ b/arch/arm/kernel/head-nommu.S @@ -258,6 +258,26 @@ M_CLASS(ldr r0, [r12, #MPU_TYPE]) setup_region r0, r5, r6, MPU_INSTR_SIDE r12 @ 0x0, BG region, enabled 2: isb +#ifdef CONFIG_XIP_KERNEL + set_region_nr r0, #MPU_ROM_REGION, r12 + isb + + ldr r5,=(MPU_AP_PL1RO_PL0NA | MPU_RGN_NORMAL) + + ldr r0, =CONFIG_XIP_PHYS_ADDR @ ROM start + ldr r6, =(_exiprom) @ ROM end + sub r6, r6, r0 @ Minimum size of region to map + clz r6, r6 @ Region size must be 2^N... + rsb r6, r6, #31 @ ...so round up region size + lsl r6, r6, #MPU_RSR_SZ @ Put size in right field + orr r6, r6, #(1 << MPU_RSR_EN) @ Set region enabled bit + + setup_region r0, r5, r6, MPU_DATA_SIDE, r12 @ XIP_PHYS_ADDR, shared, enabled + beq 3f @ Memory-map not unified + setup_region r0, r5, r6, MPU_INSTR_SIDE, r12 @ XIP_PHYS_ADDR, shared, enabled +3: isb +#endif + /* Enable the MPU */ AR_CLASS(mrc p15, 0, r0, c1, c0, 0) @ Read SCTLR AR_CLASS(bic r0, r0, #CR_BR) @ Disable the 'default mem-map' |