1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * OMAP34xx and OMAP44xx secure APIs file. 4 * 5 * Copyright (C) 2010 Texas Instruments, Inc. 6 * Written by Santosh Shilimkar <santosh.shilimkar@ti.com> 7 * 8 * Copyright (C) 2012 Ivaylo Dimitrov <freemangordon@abv.bg> 9 * Copyright (C) 2013 Pali Rohár <pali@kernel.org> 10 */ 11 12 #include <linux/linkage.h> 13 14 /* 15 * This is common routine to manage secure monitor API 16 * used to modify the PL310 secure registers. 17 * 'r0' contains the value to be modified and 'r12' contains 18 * the monitor API number. It uses few CPU registers 19 * internally and hence they need be backed up including 20 * link register "lr". 21 * Function signature : void _omap_smc1(u32 fn, u32 arg) 22 */ 23 .arch armv7-a 24 .arch_extension sec 25 ENTRY(_omap_smc1) 26 stmfd sp!, {r2-r12, lr} 27 mov r12, r0 28 mov r0, r1 29 dsb 30 smc #0 31 ldmfd sp!, {r2-r12, pc} 32 ENDPROC(_omap_smc1) 33 34 /** 35 * u32 omap_smc2(u32 id, u32 falg, u32 pargs) 36 * Low level common routine for secure HAL and PPA APIs. 37 * @id: Application ID of HAL APIs 38 * @flag: Flag to indicate the criticality of operation 39 * @pargs: Physical address of parameter list starting 40 * with number of parametrs 41 */ 42 ENTRY(omap_smc2) 43 stmfd sp!, {r4-r12, lr} 44 mov r3, r2 45 mov r2, r1 46 mov r1, #0x0 @ Process ID 47 mov r6, #0xff 48 mov r12, #0x00 @ Secure Service ID 49 mov r7, #0 50 mcr p15, 0, r7, c7, c5, 6 51 dsb 52 dmb 53 smc #0 54 ldmfd sp!, {r4-r12, pc} 55 ENDPROC(omap_smc2) 56 57 /** 58 * u32 omap_smc3(u32 service_id, u32 process_id, u32 flag, u32 pargs) 59 * Low level common routine for secure HAL and PPA APIs via smc #1 60 * r0 - @service_id: Secure Service ID 61 * r1 - @process_id: Process ID 62 * r2 - @flag: Flag to indicate the criticality of operation 63 * r3 - @pargs: Physical address of parameter list 64 */ 65 ENTRY(omap_smc3) 66 stmfd sp!, {r4-r11, lr} 67 mov r12, r0 @ Copy the secure service ID 68 mov r6, #0xff @ Indicate new Task call 69 dsb @ Memory Barrier (not sure if needed, copied from omap_smc2) 70 smc #1 @ Call PPA service 71 ldmfd sp!, {r4-r11, pc} 72 ENDPROC(omap_smc3) 73 74 ENTRY(omap_modify_auxcoreboot0) 75 stmfd sp!, {r1-r12, lr} 76 ldr r12, =0x104 77 dsb 78 smc #0 79 ldmfd sp!, {r1-r12, pc} 80 ENDPROC(omap_modify_auxcoreboot0) 81 82 ENTRY(omap_auxcoreboot_addr) 83 stmfd sp!, {r2-r12, lr} 84 ldr r12, =0x105 85 dsb 86 smc #0 87 ldmfd sp!, {r2-r12, pc} 88 ENDPROC(omap_auxcoreboot_addr) 89 90 ENTRY(omap_read_auxcoreboot0) 91 stmfd sp!, {r2-r12, lr} 92 ldr r12, =0x103 93 dsb 94 smc #0 95 ldmfd sp!, {r2-r12, pc} 96 ENDPROC(omap_read_auxcoreboot0) 97