| /* 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); |
