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https://github.com/edk2-porting/linux-next.git
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3a6e9bd7f6
Without this, we attempt to use doorbells for IPIs, and end up branching to some bad address. Plus, even for the exceptions we don't implement, it's good to handle it and get a message out. Signed-off-by: Scott Wood <scottwood@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
99 lines
2.2 KiB
ArmAsm
99 lines
2.2 KiB
ArmAsm
/*
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* This file contains low level CPU setup functions.
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* Kumar Gala <galak@kernel.crashing.org>
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* Copyright 2009 Freescale Semiconductor, Inc.
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*
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* Based on cpu_setup_6xx code by
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* Benjamin Herrenschmidt <benh@kernel.crashing.org>
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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
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*
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*/
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#include <asm/processor.h>
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#include <asm/cputable.h>
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#include <asm/ppc_asm.h>
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_GLOBAL(__e500_icache_setup)
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mfspr r0, SPRN_L1CSR1
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andi. r3, r0, L1CSR1_ICE
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bnelr /* Already enabled */
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oris r0, r0, L1CSR1_CPE@h
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ori r0, r0, (L1CSR1_ICFI | L1CSR1_ICLFR | L1CSR1_ICE)
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mtspr SPRN_L1CSR1, r0 /* Enable I-Cache */
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isync
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blr
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_GLOBAL(__e500_dcache_setup)
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mfspr r0, SPRN_L1CSR0
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andi. r3, r0, L1CSR0_DCE
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bnelr /* Already enabled */
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msync
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isync
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li r0, 0
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mtspr SPRN_L1CSR0, r0 /* Disable */
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msync
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isync
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li r0, (L1CSR0_DCFI | L1CSR0_CLFC)
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mtspr SPRN_L1CSR0, r0 /* Invalidate */
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isync
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1: mfspr r0, SPRN_L1CSR0
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andi. r3, r0, L1CSR0_CLFC
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bne+ 1b /* Wait for lock bits reset */
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oris r0, r0, L1CSR0_CPE@h
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ori r0, r0, L1CSR0_DCE
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msync
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isync
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mtspr SPRN_L1CSR0, r0 /* Enable */
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isync
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blr
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#ifdef CONFIG_PPC32
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_GLOBAL(__setup_cpu_e200)
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/* enable dedicated debug exception handling resources (Debug APU) */
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mfspr r3,SPRN_HID0
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ori r3,r3,HID0_DAPUEN@l
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mtspr SPRN_HID0,r3
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b __setup_e200_ivors
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_GLOBAL(__setup_cpu_e500v1)
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_GLOBAL(__setup_cpu_e500v2)
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mflr r4
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bl __e500_icache_setup
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bl __e500_dcache_setup
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bl __setup_e500_ivors
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#ifdef CONFIG_FSL_RIO
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/* Ensure that RFXE is set */
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mfspr r3,SPRN_HID1
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oris r3,r3,HID1_RFXE@h
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mtspr SPRN_HID1,r3
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#endif
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mtlr r4
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blr
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_GLOBAL(__setup_cpu_e500mc)
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mflr r4
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bl __e500_icache_setup
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bl __e500_dcache_setup
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bl __setup_e500mc_ivors
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mtlr r4
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blr
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#endif
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/* Right now, restore and setup are the same thing */
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_GLOBAL(__restore_cpu_e5500)
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_GLOBAL(__setup_cpu_e5500)
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mflr r4
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bl __e500_icache_setup
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bl __e500_dcache_setup
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#ifdef CONFIG_PPC_BOOK3E_64
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bl .__setup_base_ivors
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bl .setup_perfmon_ivor
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bl .setup_doorbell_ivors
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bl .setup_ehv_ivors
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#else
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bl __setup_e500mc_ivors
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#endif
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mtlr r4
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blr
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