60 lines
1.7 KiB
ArmAsm
60 lines
1.7 KiB
ArmAsm
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/*
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* (C) Copyright 2007-2013
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* Allwinner Technology Co., Ltd. <www.allwinnertech.com>
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* sunny <sunny@allwinnertech.com>
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#define TEE_SMC_NS_IRQ_DONE (0x0FFFFFF7)
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#define TEE_SMC_NS_IRQ_CALL (0x0FFFFFF6)
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.global sunxi_smc_call
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.func sunxi_smc_call
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sunxi_smc_call:
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stmfd sp!, {r4-r12, lr} @ save reg state
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mrs r4, cpsr
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push {r4}
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cpsid f
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cpsid i
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sunxi_issue_smc:
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.arch_extension sec
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smc #0
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cmp r0, #TEE_SMC_NS_IRQ_CALL
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beq sunxi_smc_irq_handle
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pop {r4}
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msr cpsr_cxsf, r4
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ldmfd sp!, {r4-r12, pc} @ restore saved regs and return
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sunxi_smc_irq_handle:
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/*
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* RIQ raised while in secure world, unmask IRQ temporarily to
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* receive the IRQ in as it's normally recieved.
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*/
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cpsie i
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nop
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nop
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nop
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nop
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dsb
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isb
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cpsid i
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ldr r0, =TEE_SMC_NS_IRQ_DONE
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b sunxi_issue_smc @ Goback to secure world
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.endfunc
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