linux/arch/arm/mach-omap2/omap-smc.S
Santosh Shilimkar ba9456ac9c ARM: OMAP: Add Secure HAL and monitor mode API infrastructure.
On OMAP secure/emulation devices, certain APIs are exported by secure
code. Add an infrastructure so that relevant operations on secure
devices can be implemented using it.

While at this, rename omap44xx-smc.S to omap-smc.S since the common APIs
can be used on other OMAP's too.

Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Acked-by: Jean Pihet <j-pihet@ti.com>
Reviewed-by: Kevin Hilman <khilman@ti.com>
Tested-by: Vishwanath BS <vishwanath.bs@ti.com>
Signed-off-by: Kevin Hilman <khilman@ti.com>
2011-12-08 11:29:00 -08:00

80 lines
1.8 KiB
ArmAsm

/*
* OMAP44xx secure APIs file.
*
* Copyright (C) 2010 Texas Instruments, Inc.
* Written by Santosh Shilimkar <santosh.shilimkar@ti.com>
*
*
* This program is free software,you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#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)
*/
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)
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
mov r0, r0, lsr #9
ldmfd sp!, {r2-r12, pc}
ENDPROC(omap_read_auxcoreboot0)