1*4882a593Smuzhiyun/* SPDX-License-Identifier: GPL-2.0-or-later */ 2*4882a593Smuzhiyun/* 3*4882a593Smuzhiyun * Copyright (c) 2016 IBM Corporation. 4*4882a593Smuzhiyun */ 5*4882a593Smuzhiyun 6*4882a593Smuzhiyun#include "ppc_asm.h" 7*4882a593Smuzhiyun#include "../include/asm/opal-api.h" 8*4882a593Smuzhiyun 9*4882a593Smuzhiyun .text 10*4882a593Smuzhiyun 11*4882a593Smuzhiyun .globl opal_kentry 12*4882a593Smuzhiyunopal_kentry: 13*4882a593Smuzhiyun /* r3 is the fdt ptr */ 14*4882a593Smuzhiyun mtctr r4 15*4882a593Smuzhiyun li r4, 0 16*4882a593Smuzhiyun li r5, 0 17*4882a593Smuzhiyun li r6, 0 18*4882a593Smuzhiyun li r7, 0 19*4882a593Smuzhiyun ld r11,opal@got(r2) 20*4882a593Smuzhiyun ld r8,0(r11) 21*4882a593Smuzhiyun ld r9,8(r11) 22*4882a593Smuzhiyun bctr 23*4882a593Smuzhiyun 24*4882a593Smuzhiyun#define OPAL_CALL(name, token) \ 25*4882a593Smuzhiyun .globl name; \ 26*4882a593Smuzhiyunname: \ 27*4882a593Smuzhiyun li r0, token; \ 28*4882a593Smuzhiyun b opal_call; 29*4882a593Smuzhiyun 30*4882a593Smuzhiyunopal_call: 31*4882a593Smuzhiyun mflr r11 32*4882a593Smuzhiyun std r11,16(r1) 33*4882a593Smuzhiyun mfcr r12 34*4882a593Smuzhiyun stw r12,8(r1) 35*4882a593Smuzhiyun mr r13,r2 36*4882a593Smuzhiyun 37*4882a593Smuzhiyun /* Set opal return address */ 38*4882a593Smuzhiyun ld r11,opal_return@got(r2) 39*4882a593Smuzhiyun mtlr r11 40*4882a593Smuzhiyun mfmsr r12 41*4882a593Smuzhiyun 42*4882a593Smuzhiyun /* switch to BE when we enter OPAL */ 43*4882a593Smuzhiyun li r11,MSR_LE 44*4882a593Smuzhiyun andc r12,r12,r11 45*4882a593Smuzhiyun mtspr SPRN_HSRR1,r12 46*4882a593Smuzhiyun 47*4882a593Smuzhiyun /* load the opal call entry point and base */ 48*4882a593Smuzhiyun ld r11,opal@got(r2) 49*4882a593Smuzhiyun ld r12,8(r11) 50*4882a593Smuzhiyun ld r2,0(r11) 51*4882a593Smuzhiyun mtspr SPRN_HSRR0,r12 52*4882a593Smuzhiyun hrfid 53*4882a593Smuzhiyun 54*4882a593Smuzhiyunopal_return: 55*4882a593Smuzhiyun FIXUP_ENDIAN 56*4882a593Smuzhiyun mr r2,r13; 57*4882a593Smuzhiyun lwz r11,8(r1); 58*4882a593Smuzhiyun ld r12,16(r1) 59*4882a593Smuzhiyun mtcr r11; 60*4882a593Smuzhiyun mtlr r12 61*4882a593Smuzhiyun blr 62*4882a593Smuzhiyun 63*4882a593SmuzhiyunOPAL_CALL(opal_console_write, OPAL_CONSOLE_WRITE); 64*4882a593SmuzhiyunOPAL_CALL(opal_console_read, OPAL_CONSOLE_READ); 65*4882a593SmuzhiyunOPAL_CALL(opal_console_write_buffer_space, OPAL_CONSOLE_WRITE_BUFFER_SPACE); 66*4882a593SmuzhiyunOPAL_CALL(opal_poll_events, OPAL_POLL_EVENTS); 67*4882a593SmuzhiyunOPAL_CALL(opal_console_flush, OPAL_CONSOLE_FLUSH); 68