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