//------------------------------------------------------------------------------ // // Copyright (c) 2008 - 2010, Apple Inc. All rights reserved.
// Copyright (c) 2011, ARM Limited. All rights reserved. // // This program and the accompanying materials // are licensed and made available under the terms and conditions of the BSD License // which accompanies this distribution. The full text of the license may be found at // http://opensource.org/licenses/bsd-license.php // // THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, // WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. // //------------------------------------------------------------------------------ EXPORT ArmInvalidateInstructionCache EXPORT ArmInvalidateDataCacheEntryByMVA EXPORT ArmCleanDataCacheEntryByMVA EXPORT ArmCleanInvalidateDataCacheEntryByMVA EXPORT ArmInvalidateDataCacheEntryBySetWay EXPORT ArmCleanDataCacheEntryBySetWay EXPORT ArmCleanInvalidateDataCacheEntryBySetWay EXPORT ArmDrainWriteBuffer EXPORT ArmEnableMmu EXPORT ArmDisableMmu EXPORT ArmDisableCachesAndMmu EXPORT ArmMmuEnabled EXPORT ArmEnableDataCache EXPORT ArmDisableDataCache EXPORT ArmEnableInstructionCache EXPORT ArmDisableInstructionCache EXPORT ArmEnableSWPInstruction EXPORT ArmEnableBranchPrediction EXPORT ArmDisableBranchPrediction EXPORT ArmSetLowVectors EXPORT ArmSetHighVectors EXPORT ArmV7AllDataCachesOperation EXPORT ArmV7PerformPoUDataCacheOperation EXPORT ArmDataMemoryBarrier EXPORT ArmDataSyncronizationBarrier EXPORT ArmInstructionSynchronizationBarrier EXPORT ArmWriteVBar EXPORT ArmEnableVFP EXPORT ArmCallWFI EXPORT ArmReadCbar EXPORT ArmInvalidateInstructionAndDataTlb EXPORT ArmReadMpidr EXPORT ArmReadTpidrurw EXPORT ArmWriteTpidrurw EXPORT ArmIsArchTimerImplemented EXPORT ArmReadIdPfr1 AREA ArmV7Support, CODE, READONLY PRESERVE8 DC_ON EQU ( 0x1:SHL:2 ) IC_ON EQU ( 0x1:SHL:12 ) CTRL_M_BIT EQU (1 << 0) CTRL_C_BIT EQU (1 << 2) CTRL_B_BIT EQU (1 << 7) CTRL_I_BIT EQU (1 << 12) ArmInvalidateDataCacheEntryByMVA mcr p15, 0, r0, c7, c6, 1 ; invalidate single data cache line dsb isb bx lr ArmCleanDataCacheEntryByMVA mcr p15, 0, r0, c7, c10, 1 ; clean single data cache line dsb isb bx lr ArmCleanInvalidateDataCacheEntryByMVA mcr p15, 0, r0, c7, c14, 1 ; clean and invalidate single data cache line dsb isb bx lr ArmInvalidateDataCacheEntryBySetWay mcr p15, 0, r0, c7, c6, 2 ; Invalidate this line dsb isb bx lr ArmCleanInvalidateDataCacheEntryBySetWay mcr p15, 0, r0, c7, c14, 2 ; Clean and Invalidate this line dsb isb bx lr ArmCleanDataCacheEntryBySetWay mcr p15, 0, r0, c7, c10, 2 ; Clean this line dsb isb bx lr ArmInvalidateInstructionCache mcr p15,0,R0,c7,c5,0 ;Invalidate entire instruction cache isb bx LR ArmEnableMmu mrc p15,0,R0,c1,c0,0 ; Read SCTLR into R0 (Read control register configuration data) orr R0,R0,#1 ; Set SCTLR.M bit : Enable MMU mcr p15,0,R0,c1,c0,0 ; Write R0 into SCTLR (Write control register configuration data) dsb isb bx LR ArmDisableMmu mrc p15,0,R0,c1,c0,0 ; Read SCTLR into R0 (Read control register configuration data) bic R0,R0,#1 ; Clear SCTLR.M bit : Disable MMU mcr p15,0,R0,c1,c0,0 ; Write R0 into SCTLR (Write control register configuration data) mcr p15,0,R0,c8,c7,0 ; TLBIALL : Invalidate unified TLB mcr p15,0,R0,c7,c5,6 ; BPIALL : Invalidate entire branch predictor array dsb isb bx LR ArmDisableCachesAndMmu mrc p15, 0, r0, c1, c0, 0 ; Get control register bic r0, r0, #CTRL_M_BIT ; Disable MMU bic r0, r0, #CTRL_C_BIT ; Disable D Cache bic r0, r0, #CTRL_I_BIT ; Disable I Cache mcr p15, 0, r0, c1, c0, 0 ; Write control register dsb isb bx LR ArmMmuEnabled mrc p15,0,R0,c1,c0,0 ; Read SCTLR into R0 (Read control register configuration data) and R0,R0,#1 bx LR ArmEnableDataCache ldr R1,=DC_ON ; Specify SCTLR.C bit : (Data) Cache enable bit mrc p15,0,R0,c1,c0,0 ; Read SCTLR into R0 (Read control register configuration data) orr R0,R0,R1 ; Set SCTLR.C bit : Data and unified caches enabled mcr p15,0,R0,c1,c0,0 ; Write R0 into SCTLR (Write control register configuration data) dsb isb bx LR ArmDisableDataCache ldr R1,=DC_ON ; Specify SCTLR.C bit : (Data) Cache enable bit mrc p15,0,R0,c1,c0,0 ; Read SCTLR into R0 (Read control register configuration data) bic R0,R0,R1 ; Clear SCTLR.C bit : Data and unified caches disabled mcr p15,0,R0,c1,c0,0 ; Write R0 into SCTLR (Write control register configuration data) dsb isb bx LR ArmEnableInstructionCache ldr R1,=IC_ON ; Specify SCTLR.I bit : Instruction cache enable bit mrc p15,0,R0,c1,c0,0 ; Read SCTLR into R0 (Read control register configuration data) orr R0,R0,R1 ; Set SCTLR.I bit : Instruction caches enabled mcr p15,0,R0,c1,c0,0 ; Write R0 into SCTLR (Write control register configuration data) dsb isb bx LR ArmDisableInstructionCache ldr R1,=IC_ON ; Specify SCTLR.I bit : Instruction cache enable bit mrc p15,0,R0,c1,c0,0 ; Read SCTLR into R0 (Read control register configuration data) BIC R0,R0,R1 ; Clear SCTLR.I bit : Instruction caches disabled mcr p15,0,R0,c1,c0,0 ; Write R0 into SCTLR (Write control register configuration data) isb bx LR ArmEnableSWPInstruction mrc p15, 0, r0, c1, c0, 0 orr r0, r0, #0x00000400 mcr p15, 0, r0, c1, c0, 0 isb bx LR ArmEnableBranchPrediction mrc p15, 0, r0, c1, c0, 0 ; Read SCTLR into R0 (Read control register configuration data) orr r0, r0, #0x00000800 ; mcr p15, 0, r0, c1, c0, 0 ; Write R0 into SCTLR (Write control register configuration data) dsb isb bx LR ArmDisableBranchPrediction mrc p15, 0, r0, c1, c0, 0 ; Read SCTLR into R0 (Read control register configuration data) bic r0, r0, #0x00000800 ; mcr p15, 0, r0, c1, c0, 0 ; Write R0 into SCTLR (Write control register configuration data) dsb isb bx LR ArmSetLowVectors mrc p15, 0, r0, c1, c0, 0 ; Read SCTLR into R0 (Read control register configuration data) bic r0, r0, #0x00002000 ; clear V bit mcr p15, 0, r0, c1, c0, 0 ; Write R0 into SCTLR (Write control register configuration data) isb bx LR ArmSetHighVectors mrc p15, 0, r0, c1, c0, 0 ; Read SCTLR into R0 (Read control register configuration data) orr r0, r0, #0x00002000 ; clear V bit mcr p15, 0, r0, c1, c0, 0 ; Write R0 into SCTLR (Write control register configuration data) isb bx LR ArmV7AllDataCachesOperation stmfd SP!,{r4-r12, LR} mov R1, R0 ; Save Function call in R1 mrc p15, 1, R6, c0, c0, 1 ; Read CLIDR ands R3, R6, #&7000000 ; Mask out all but Level of Coherency (LoC) mov R3, R3, LSR #23 ; Cache level value (naturally aligned) beq Finished mov R10, #0 Loop1 add R2, R10, R10, LSR #1 ; Work out 3xcachelevel mov R12, R6, LSR R2 ; bottom 3 bits are the Cache type for this level and R12, R12, #7 ; get those 3 bits alone cmp R12, #2 blt Skip ; no cache or only instruction cache at this level mcr p15, 2, R10, c0, c0, 0 ; write the Cache Size selection register (CSSELR) // OR in 1 for Instruction isb ; isb to sync the change to the CacheSizeID reg mrc p15, 1, R12, c0, c0, 0 ; reads current Cache Size ID register (CCSIDR) and R2, R12, #&7 ; extract the line length field add R2, R2, #4 ; add 4 for the line length offset (log2 16 bytes) ldr R4, =0x3FF ands R4, R4, R12, LSR #3 ; R4 is the max number on the way size (right aligned) clz R5, R4 ; R5 is the bit position of the way size increment ldr R7, =0x00007FFF ands R7, R7, R12, LSR #13 ; R7 is the max number of the index size (right aligned) Loop2 mov R9, R4 ; R9 working copy of the max way size (right aligned) Loop3 orr R0, R10, R9, LSL R5 ; factor in the way number and cache number into R11 orr R0, R0, R7, LSL R2 ; factor in the index number blx R1 subs R9, R9, #1 ; decrement the way number bge Loop3 subs R7, R7, #1 ; decrement the index bge Loop2 Skip add R10, R10, #2 ; increment the cache number cmp R3, R10 bgt Loop1 Finished dsb ldmfd SP!, {r4-r12, lr} bx LR ArmV7PerformPoUDataCacheOperation stmfd SP!,{r4-r12, LR} mov R1, R0 ; Save Function call in R1 mrc p15, 1, R6, c0, c0, 1 ; Read CLIDR ands R3, R6, #&38000000 ; Mask out all but Level of Unification (LoU) mov R3, R3, LSR #26 ; Cache level value (naturally aligned) beq Finished2 mov R10, #0 Loop4 add R2, R10, R10, LSR #1 ; Work out 3xcachelevel mov R12, R6, LSR R2 ; bottom 3 bits are the Cache type for this level and R12, R12, #7 ; get those 3 bits alone cmp R12, #2 blt Skip2 ; no cache or only instruction cache at this level mcr p15, 2, R10, c0, c0, 0 ; write the Cache Size selection register (CSSELR) // OR in 1 for Instruction isb ; isb to sync the change to the CacheSizeID reg mrc p15, 1, R12, c0, c0, 0 ; reads current Cache Size ID register (CCSIDR) and R2, R12, #&7 ; extract the line length field add R2, R2, #4 ; add 4 for the line length offset (log2 16 bytes) ldr R4, =0x3FF ands R4, R4, R12, LSR #3 ; R4 is the max number on the way size (right aligned) clz R5, R4 ; R5 is the bit position of the way size increment ldr R7, =0x00007FFF ands R7, R7, R12, LSR #13 ; R7 is the max number of the index size (right aligned) Loop5 mov R9, R4 ; R9 working copy of the max way size (right aligned) Loop6 orr R0, R10, R9, LSL R5 ; factor in the way number and cache number into R11 orr R0, R0, R7, LSL R2 ; factor in the index number blx R1 subs R9, R9, #1 ; decrement the way number bge Loop6 subs R7, R7, #1 ; decrement the index bge Loop5 Skip2 add R10, R10, #2 ; increment the cache number cmp R3, R10 bgt Loop4 Finished2 dsb ldmfd SP!, {r4-r12, lr} bx LR ArmDataMemoryBarrier dmb bx LR ArmDataSyncronizationBarrier ArmDrainWriteBuffer dsb bx LR ArmInstructionSynchronizationBarrier isb bx LR ArmWriteVBar // Set the Address of the Vector Table in the VBAR register mcr p15, 0, r0, c12, c0, 0 // Ensure the SCTLR.V bit is clear mrc p15, 0, r0, c1, c0, 0 ; Read SCTLR into R0 (Read control register configuration data) bic r0, r0, #0x00002000 ; clear V bit mcr p15, 0, r0, c1, c0, 0 ; Write R0 into SCTLR (Write control register configuration data) isb bx lr ArmEnableVFP // Read CPACR (Coprocessor Access Control Register) mrc p15, 0, r0, c1, c0, 2 // Enable VPF access (Full Access to CP10, CP11) (V* instructions) orr r0, r0, #0x00f00000 // Write back CPACR (Coprocessor Access Control Register) mcr p15, 0, r0, c1, c0, 2 // Set EN bit in FPEXC. The Advanced SIMD and VFP extensions are enabled and operate normally. mov r0, #0x40000000 mcr p10,#0x7,r0,c8,c0,#0 bx lr ArmCallWFI wfi bx lr //Note: Return 0 in Uniprocessor implementation ArmReadCbar mrc p15, 4, r0, c15, c0, 0 //Read Configuration Base Address Register bx lr ArmInvalidateInstructionAndDataTlb mcr p15, 0, r0, c8, c7, 0 ; Invalidate Inst TLB and Data TLB dsb bx lr ArmReadMpidr mrc p15, 0, r0, c0, c0, 5 ; read MPIDR bx lr ArmReadTpidrurw mrc p15, 0, r0, c13, c0, 2 ; read TPIDRURW bx lr ArmWriteTpidrurw mcr p15, 0, r0, c13, c0, 2 ; write TPIDRURW bx lr ArmIsArchTimerImplemented mrc p15, 0, r0, c0, c1, 1 ; Read ID_PFR1 and r0, r0, #0x000F0000 bx lr ArmReadIdPfr1 mrc p15, 0, r0, c0, c1, 1 ; Read ID_PFR1 Register bx lr END