diff options
Diffstat (limited to 'c/src/lib/libbsp/arm/shared/startup/bsp-start-in-hyp-support.S')
| -rw-r--r-- | c/src/lib/libbsp/arm/shared/startup/bsp-start-in-hyp-support.S | 77 |
1 files changed, 0 insertions, 77 deletions
diff --git a/c/src/lib/libbsp/arm/shared/startup/bsp-start-in-hyp-support.S b/c/src/lib/libbsp/arm/shared/startup/bsp-start-in-hyp-support.S deleted file mode 100644 index b608c59fa8..0000000000 --- a/c/src/lib/libbsp/arm/shared/startup/bsp-start-in-hyp-support.S +++ /dev/null @@ -1,77 +0,0 @@ -/** - * @file - * - * @brief Boot and system start code. - */ - - /* - * Copyright (c) 2016 Pavel Pisa <pisa@cmp.felk.cvut.cz> - * - * Czech Technical University in Prague - * Zikova 1903/4 - * 166 36 Praha 6 - * Czech Republic - * - * The license and distribution terms for this file may be - * found in the file LICENSE in this distribution or at - * http://www.rtems.org/license/LICENSE. - */ - -#include <rtems/asm.h> -#include <rtems/system.h> -#include <rtems/score/cpu.h> - -#include <bspopts.h> -#include <bsp/irq.h> -#include <bsp/linker-symbols.h> - - .extern bsp_start_hyp_vector_table_begin - .globl bsp_start_arm_drop_hyp_mode - .globl bsp_arm_drop_hyp_mode_only - -.arm - -/* - * The routine is called from startup code and it should - * preserve all registers except r2 and r3. r0 can be used - * as pass though argument in some cases, a1 is used for - * CPU stack offset during startup and r4 to r6 to preserve - * booloader arguments - */ - -bsp_start_arm_drop_hyp_mode: - ldr r2, bsp_start_hyp_vector_table_begin_addr - mcr p15, 4, r2, c12, c0, 0 - - mov r2, #0 - mcr p15, 4, r2, c1, c1, 0 - mcr p15, 4, r2, c1, c1, 2 - mcr p15, 4, r2, c1, c1, 3 -/* - * HSCTLR.TE - * optional start of hypervisor handlers in Thumb mode - * orr r0, #(1 << 30) - */ - mcr p15, 4, r2, c1, c0, 0 /* HSCTLR */ - mrc p15, 4, r2, c1, c1, 1 /* HDCR */ - and r2, #0x1f /* Preserve HPMN */ - mcr p15, 4, r2, c1, c1, 1 /* HDCR */ - -bsp_arm_drop_hyp_mode_only: - /* Prepare SVC mode for eret */ - mrs r2, cpsr - bic r2, r2, #ARM_PSR_M_MASK - orr r2, r2, #ARM_PSR_M_SVC - msr spsr_cxsf, r2 - - adr r2, 1f - .inst 0xe12ef302 /* msr ELR_hyp, r2 */ - mov r2, sp - mov r3, lr - .inst 0xe160006e /* eret */ -1: mov sp, r2 - mov lr, r3 - bx lr - -bsp_start_hyp_vector_table_begin_addr: - .word bsp_start_hyp_vector_table_begin |