/* 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@kernel.org>
 */

#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 flag, 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)