| York Sun | a84cd72 | 2014-06-23 15:15:54 -0700 | [diff] [blame^] | 1 | /* |
| 2 | * (C) Copyright 2014 Freescale Semiconductor |
| 3 | * |
| 4 | * SPDX-License-Identifier: GPL-2.0+ |
| 5 | * |
| 6 | * Extracted from armv8/start.S |
| 7 | */ |
| 8 | |
| 9 | #include <config.h> |
| 10 | #include <linux/linkage.h> |
| 11 | #include <asm/macro.h> |
| 12 | |
| 13 | ENTRY(lowlevel_init) |
| 14 | mov x29, lr /* Save LR */ |
| 15 | |
| 16 | /* Set the SMMU page size in the sACR register */ |
| 17 | ldr x1, =SMMU_BASE |
| 18 | ldr w0, [x1, #0x10] |
| 19 | orr w0, w0, #1 << 16 /* set sACR.pagesize to indicate 64K page */ |
| 20 | str w0, [x1, #0x10] |
| 21 | |
| 22 | /* Initialize GIC Secure Bank Status */ |
| 23 | #if defined(CONFIG_GICV2) || defined(CONFIG_GICV3) |
| 24 | branch_if_slave x0, 1f |
| 25 | ldr x0, =GICD_BASE |
| 26 | bl gic_init_secure |
| 27 | 1: |
| 28 | #ifdef CONFIG_GICV3 |
| 29 | ldr x0, =GICR_BASE |
| 30 | bl gic_init_secure_percpu |
| 31 | #elif defined(CONFIG_GICV2) |
| 32 | ldr x0, =GICD_BASE |
| 33 | ldr x1, =GICC_BASE |
| 34 | bl gic_init_secure_percpu |
| 35 | #endif |
| 36 | #endif |
| 37 | |
| 38 | branch_if_master x0, x1, 1f |
| 39 | |
| 40 | /* |
| 41 | * Slave should wait for master clearing spin table. |
| 42 | * This sync prevent salves observing incorrect |
| 43 | * value of spin table and jumping to wrong place. |
| 44 | */ |
| 45 | #if defined(CONFIG_GICV2) || defined(CONFIG_GICV3) |
| 46 | #ifdef CONFIG_GICV2 |
| 47 | ldr x0, =GICC_BASE |
| 48 | #endif |
| 49 | bl gic_wait_for_interrupt |
| 50 | #endif |
| 51 | |
| 52 | /* |
| 53 | * All processors will enter EL2 and optionally EL1. |
| 54 | */ |
| 55 | bl armv8_switch_to_el2 |
| 56 | #ifdef CONFIG_ARMV8_SWITCH_TO_EL1 |
| 57 | bl armv8_switch_to_el1 |
| 58 | #endif |
| 59 | b 2f |
| 60 | |
| 61 | 1: |
| 62 | 2: |
| 63 | mov lr, x29 /* Restore LR */ |
| 64 | ret |
| 65 | ENDPROC(lowlevel_init) |