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- /*
- * Copyright (C) 2013 Broadcom Corporation
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation version 2.
- *
- * This program is distributed "as is" WITHOUT ANY WARRANTY of any
- * kind, whether express or implied; without even the implied warranty
- * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- */
- #include <linux/linkage.h>
- #include "bcm_kona_smc.h"
- /*
- * int bcm_kona_smc_asm(u32 service_id, u32 buffer_addr)
- */
- ENTRY(bcm_kona_smc_asm)
- stmfd sp!, {r4-r12, lr}
- mov r4, r0 @ service_id
- mov r5, #3 @ Keep IRQ and FIQ off in SM
- /*
- * Since interrupts are disabled in the open mode, we must keep
- * interrupts disabled in secure mode by setting R5=0x3. If interrupts
- * are enabled in open mode, we can set R5=0x0 to allow interrupts in
- * secure mode. If we did this, the secure monitor would return back
- * control to the open mode to handle the interrupt prior to completing
- * the secure service. If this happened, R12 would not be
- * SEC_EXIT_NORMAL and we would need to call SMC again after resetting
- * R5 (it gets clobbered by the secure monitor) and setting R4 to
- * SSAPI_RET_FROM_INT_SERV to indicate that we want the secure monitor
- * to finish up the previous uncompleted secure service.
- */
- mov r6, r1 @ buffer_addr
- smc #0
- /* Check r12 for SEC_EXIT_NORMAL here if interrupts are enabled */
- ldmfd sp!, {r4-r12, pc}
- ENDPROC(bcm_kona_smc_asm)
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