1*4882a593Smuzhiyun/* 2*4882a593Smuzhiyun * Copyright (C) 2012 Nobuhiro Iwamatsu <nobuhiro.Iwamatsu.yj@renesas.com> 3*4882a593Smuzhiyun * Copyright (C) 2012 Renesas Solutions Corp. 4*4882a593Smuzhiyun * 5*4882a593Smuzhiyun * SPDX-License-Identifier: GPL-2.0+ 6*4882a593Smuzhiyun */ 7*4882a593Smuzhiyun 8*4882a593Smuzhiyun#include <config.h> 9*4882a593Smuzhiyun#include <linux/linkage.h> 10*4882a593Smuzhiyun 11*4882a593SmuzhiyunENTRY(lowlevel_init) 12*4882a593Smuzhiyun ldr r0, =MERAM_BASE 13*4882a593Smuzhiyun mov r1, #0x0 14*4882a593Smuzhiyun str r1, [r0] 15*4882a593Smuzhiyun 16*4882a593Smuzhiyun mrc p15, 0, r0, c0, c0, 5 17*4882a593Smuzhiyun ands r0, r0, #0xF 18*4882a593Smuzhiyun beq lowlevel_init__ 19*4882a593Smuzhiyun b wait_interrupt 20*4882a593Smuzhiyun 21*4882a593Smuzhiyun .pool 22*4882a593Smuzhiyun .align 4 23*4882a593Smuzhiyun 24*4882a593Smuzhiyunwait_interrupt: 25*4882a593Smuzhiyun#ifdef ICCICR 26*4882a593Smuzhiyun ldr r1, =ICCICR 27*4882a593Smuzhiyun mov r2, #0x0 28*4882a593Smuzhiyun str r2, [r1] 29*4882a593Smuzhiyun mov r2, #0xF0 30*4882a593Smuzhiyun adds r1, r1, #4 /* ICCPMR */ 31*4882a593Smuzhiyun str r2, [r1] 32*4882a593Smuzhiyun ldr r1, =ICCICR 33*4882a593Smuzhiyun mov r2, #0x1 34*4882a593Smuzhiyun str r2, [r1] 35*4882a593Smuzhiyun#endif 36*4882a593Smuzhiyun 37*4882a593Smuzhiyunwait_loop: 38*4882a593Smuzhiyun .long 0xE320F003 /* wfi */ 39*4882a593Smuzhiyun 40*4882a593Smuzhiyun ldr r2, [r1, #0xC] 41*4882a593Smuzhiyun str r2, [r1, #0x10] 42*4882a593Smuzhiyun 43*4882a593Smuzhiyun ldr r0, =MERAM_BASE 44*4882a593Smuzhiyun ldr r2, [r0] 45*4882a593Smuzhiyun cmp r2, #0 46*4882a593Smuzhiyun movne pc, r2 47*4882a593Smuzhiyun 48*4882a593Smuzhiyun b wait_loop 49*4882a593Smuzhiyun 50*4882a593Smuzhiyunwait_loop_end: 51*4882a593Smuzhiyun .pool 52*4882a593Smuzhiyun .align 4 53*4882a593Smuzhiyun 54*4882a593Smuzhiyunlowlevel_init__: 55*4882a593Smuzhiyun 56*4882a593Smuzhiyun mov r0, #0x200000 57*4882a593Smuzhiyun 58*4882a593Smuzhiyunloop0: 59*4882a593Smuzhiyun subs r0, r0, #1 60*4882a593Smuzhiyun bne loop0 61*4882a593Smuzhiyun 62*4882a593Smuzhiyun ldr sp, MERAM_STACK 63*4882a593Smuzhiyun b s_init 64*4882a593Smuzhiyun 65*4882a593Smuzhiyun .pool 66*4882a593Smuzhiyun .align 4 67*4882a593Smuzhiyun 68*4882a593SmuzhiyunENDPROC(lowlevel_init) 69*4882a593Smuzhiyun .ltorg 70*4882a593Smuzhiyun 71*4882a593SmuzhiyunMERAM_STACK: 72*4882a593Smuzhiyun .word LOW_LEVEL_MERAM_STACK 73