| /* SPDX-License-Identifier: GPL-2.0-only */ |
| /* |
| * OMAP34xx and OMAP44xx secure APIs file. |
| * |
| * Copyright (C) 2010 Texas Instruments, Inc. |
| * Written by Santosh Shilimkar <santosh.shilimkar@ti.com> |
| * |
| * Copyright (C) 2012 Ivaylo Dimitrov <freemangordon@abv.bg> |
| * Copyright (C) 2013 Pali Rohár <pali.rohar@gmail.com> |
| */ |
| |
| #include <linux/linkage.h> |
| |
| /* |
| * This is common routine to manage secure monitor API |
| * used to modify the PL310 secure registers. |
| * 'r0' contains the value to be modified and 'r12' contains |
| * the monitor API number. It uses few CPU registers |
| * internally and hence they need be backed up including |
| * link register "lr". |
| * Function signature : void omap_smc1(u32 fn, u32 arg) |
| */ |
| .arch armv7-a |
| .arch_extension sec |
| ENTRY(omap_smc1) |
| stmfd sp!, {r2-r12, lr} |
| mov r12, r0 |
| mov r0, r1 |
| dsb |
| smc #0 |
| ldmfd sp!, {r2-r12, pc} |
| ENDPROC(omap_smc1) |
| |
| /** |
| * u32 omap_smc2(u32 id, u32 falg, u32 pargs) |
| * Low level common routine for secure HAL and PPA APIs. |
| * @id: Application ID of HAL APIs |
| * @flag: Flag to indicate the criticality of operation |
| * @pargs: Physical address of parameter list starting |
| * with number of parametrs |
| */ |
| ENTRY(omap_smc2) |
| stmfd sp!, {r4-r12, lr} |
| mov r3, r2 |
| mov r2, r1 |
| mov r1, #0x0 @ Process ID |
| mov r6, #0xff |
| mov r12, #0x00 @ Secure Service ID |
| mov r7, #0 |
| mcr p15, 0, r7, c7, c5, 6 |
| dsb |
| dmb |
| smc #0 |
| ldmfd sp!, {r4-r12, pc} |
| ENDPROC(omap_smc2) |
| |
| /** |
| * u32 omap_smc3(u32 service_id, u32 process_id, u32 flag, u32 pargs) |
| * Low level common routine for secure HAL and PPA APIs via smc #1 |
| * r0 - @service_id: Secure Service ID |
| * r1 - @process_id: Process ID |
| * r2 - @flag: Flag to indicate the criticality of operation |
| * r3 - @pargs: Physical address of parameter list |
| */ |
| ENTRY(omap_smc3) |
| stmfd sp!, {r4-r11, lr} |
| mov r12, r0 @ Copy the secure service ID |
| mov r6, #0xff @ Indicate new Task call |
| dsb @ Memory Barrier (not sure if needed, copied from omap_smc2) |
| smc #1 @ Call PPA service |
| ldmfd sp!, {r4-r11, pc} |
| ENDPROC(omap_smc3) |
| |
| ENTRY(omap_modify_auxcoreboot0) |
| stmfd sp!, {r1-r12, lr} |
| ldr r12, =0x104 |
| dsb |
| smc #0 |
| ldmfd sp!, {r1-r12, pc} |
| ENDPROC(omap_modify_auxcoreboot0) |
| |
| ENTRY(omap_auxcoreboot_addr) |
| stmfd sp!, {r2-r12, lr} |
| ldr r12, =0x105 |
| dsb |
| smc #0 |
| ldmfd sp!, {r2-r12, pc} |
| ENDPROC(omap_auxcoreboot_addr) |
| |
| ENTRY(omap_read_auxcoreboot0) |
| stmfd sp!, {r2-r12, lr} |
| ldr r12, =0x103 |
| dsb |
| smc #0 |
| ldmfd sp!, {r2-r12, pc} |
| ENDPROC(omap_read_auxcoreboot0) |
