| /* SPDX-License-Identifier: GPL-2.0+ */ |
| /* |
| * Copyright (C) 2012 Nobuhiro Iwamatsu <nobuhiro.Iwamatsu.yj@renesas.com> |
| * Copyright (C) 2012 Renesas Solutions Corp. |
| */ |
| |
| #include <config.h> |
| #include <linux/linkage.h> |
| |
| ENTRY(lowlevel_init) |
| ldr r0, =MERAM_BASE |
| mov r1, #0x0 |
| str r1, [r0] |
| |
| mrc p15, 0, r0, c0, c0, 5 |
| ands r0, r0, #0xF |
| beq lowlevel_init__ |
| b wait_interrupt |
| |
| .pool |
| .align 4 |
| |
| wait_interrupt: |
| #ifdef ICCICR |
| ldr r1, =ICCICR |
| mov r2, #0x0 |
| str r2, [r1] |
| mov r2, #0xF0 |
| adds r1, r1, #4 /* ICCPMR */ |
| str r2, [r1] |
| ldr r1, =ICCICR |
| mov r2, #0x1 |
| str r2, [r1] |
| #endif |
| |
| wait_loop: |
| .long 0xE320F003 /* wfi */ |
| |
| ldr r2, [r1, #0xC] |
| str r2, [r1, #0x10] |
| |
| ldr r0, =MERAM_BASE |
| ldr r2, [r0] |
| cmp r2, #0 |
| movne pc, r2 |
| |
| b wait_loop |
| |
| wait_loop_end: |
| .pool |
| .align 4 |
| |
| lowlevel_init__: |
| |
| mov r0, #0x200000 |
| |
| loop0: |
| subs r0, r0, #1 |
| bne loop0 |
| |
| ldr sp, MERAM_STACK |
| b s_init |
| |
| .pool |
| .align 4 |
| |
| ENDPROC(lowlevel_init) |
| .ltorg |
| |
| MERAM_STACK: |
| .word LOW_LEVEL_MERAM_STACK |
