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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Copyright (c) 2016 IBM Corporation.
*/
#include "ppc_asm.h"
#include "../include/asm/opal-api.h"
.text
.globl opal_kentry
opal_kentry:
/* r3 is the fdt ptr */
mtctr r4
li r4, 0
li r5, 0
li r6, 0
li r7, 0
LOAD_REG_ADDR(r11, opal)
ld r8,0(r11)
ld r9,8(r11)
bctr
#define OPAL_CALL(name, token) \
.globl name; \
name: \
li r0, token; \
b opal_call;
opal_call:
mflr r11
std r11,16(r1)
mfcr r12
stw r12,8(r1)
mr r13,r2
/* Set opal return address */
LOAD_REG_ADDR(r11, opal_return)
mtlr r11
mfmsr r12
/* switch to BE when we enter OPAL */
li r11,MSR_LE
andc r12,r12,r11
mtspr SPRN_HSRR1,r12
/* load the opal call entry point and base */
LOAD_REG_ADDR(r11, opal)
ld r12,8(r11)
ld r2,0(r11)
mtspr SPRN_HSRR0,r12
hrfid
opal_return:
FIXUP_ENDIAN
mr r2,r13;
lwz r11,8(r1);
ld r12,16(r1)
mtcr r11;
mtlr r12
blr
OPAL_CALL(opal_console_write, OPAL_CONSOLE_WRITE);
OPAL_CALL(opal_console_read, OPAL_CONSOLE_READ);
OPAL_CALL(opal_console_write_buffer_space, OPAL_CONSOLE_WRITE_BUFFER_SPACE);
OPAL_CALL(opal_poll_events, OPAL_POLL_EVENTS);
OPAL_CALL(opal_console_flush, OPAL_CONSOLE_FLUSH);
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