| /* SPDX-License-Identifier: GPL-2.0-or-later */ |
| /* |
| * Copyright (c) 2016 IBM Corporation. |
| */ |
| |
| #include <asm/ppc_asm.h> |
| |
| .text |
| .globl opal_call |
| opal_call: |
| mr r0,r3 |
| mr r3,r4 |
| mr r4,r5 |
| mr r5,r6 |
| mr r6,r7 |
| mflr r11 |
| std r11,16(r1) |
| mfcr r12 |
| stw r12,8(r1) |
| std r2,-8(r1) /* use redzone */ |
| |
| /* Set opal return address */ |
| LOAD_REG_ADDR(r11, opal_return) |
| mtlr r11 |
| mfmsr r12 |
| std r12,-16(r1) /* use redzone */ |
| |
| /* switch to BE and real-mode when we enter OPAL */ |
| li r11,(1 << MSR_LE_BIT) | MSR_IR | MSR_DR |
| ori r11,r11,(1 << MSR_EE_BIT) |
| andc r12,r12,r11 |
| mtspr SPR_HSRR1,r12 |
| |
| /* load the opal call entry point and base */ |
| LOAD_REG_ADDR(r11, opal) |
| ld r12,8(r11) |
| ld r2,0(r11) |
| mtspr SPR_HSRR0,r12 |
| hrfid |
| |
| opal_return: |
| FIXUP_ENDIAN |
| ld r12,-16(r1) /* use redzone */ |
| mtmsrd r12 |
| ld r2,-8(r1) /* use redzone */ |
| lwz r11,8(r1); |
| ld r12,16(r1) |
| mtcr r11; |
| mtlr r12 |
| blr |
