827 lines
25 KiB
ArmAsm
827 lines
25 KiB
ArmAsm
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/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* linux/arch/arm/mm/proc-v7.S
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*
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* Copyright (C) 2001 Deep Blue Solutions Ltd.
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*
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* This is the "shell" of the ARMv7 processor support.
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*/
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#include <linux/arm-smccc.h>
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#include <linux/init.h>
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#include <linux/linkage.h>
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#include <asm/assembler.h>
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#include <asm/asm-offsets.h>
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#include <asm/hwcap.h>
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#include <asm/pgtable-hwdef.h>
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#include <asm/pgtable.h>
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#include <asm/memory.h>
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#include "proc-macros.S"
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#ifdef CONFIG_ARM_LPAE
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#include "proc-v7-3level.S"
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#else
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#include "proc-v7-2level.S"
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#endif
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ENTRY(cpu_v7_proc_init)
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ret lr
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ENDPROC(cpu_v7_proc_init)
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ENTRY(cpu_v7_proc_fin)
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mrc p15, 0, r0, c1, c0, 0 @ ctrl register
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bic r0, r0, #0x1000 @ ...i............
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bic r0, r0, #0x0006 @ .............ca.
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mcr p15, 0, r0, c1, c0, 0 @ disable caches
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ret lr
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ENDPROC(cpu_v7_proc_fin)
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/*
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* cpu_v7_reset(loc, hyp)
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*
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* Perform a soft reset of the system. Put the CPU into the
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* same state as it would be if it had been reset, and branch
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* to what would be the reset vector.
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*
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* - loc - location to jump to for soft reset
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* - hyp - indicate if restart occurs in HYP mode
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*
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* This code must be executed using a flat identity mapping with
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* caches disabled.
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*/
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.align 5
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.pushsection .idmap.text, "ax"
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ENTRY(cpu_v7_reset)
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mrc p15, 0, r2, c1, c0, 0 @ ctrl register
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bic r2, r2, #0x1 @ ...............m
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THUMB( bic r2, r2, #1 << 30 ) @ SCTLR.TE (Thumb exceptions)
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mcr p15, 0, r2, c1, c0, 0 @ disable MMU
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isb
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#ifdef CONFIG_ARM_VIRT_EXT
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teq r1, #0
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bne __hyp_soft_restart
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#endif
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bx r0
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ENDPROC(cpu_v7_reset)
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.popsection
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/*
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* cpu_v7_do_idle()
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*
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* Idle the processor (eg, wait for interrupt).
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*
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* IRQs are already disabled.
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*/
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ENTRY(cpu_v7_do_idle)
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dsb @ WFI may enter a low-power mode
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wfi
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ret lr
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ENDPROC(cpu_v7_do_idle)
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ENTRY(cpu_v7_dcache_clean_area)
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ALT_SMP(W(nop)) @ MP extensions imply L1 PTW
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ALT_UP_B(1f)
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ret lr
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1: dcache_line_size r2, r3
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2: mcr p15, 0, r0, c7, c10, 1 @ clean D entry
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add r0, r0, r2
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subs r1, r1, r2
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bhi 2b
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dsb ishst
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ret lr
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ENDPROC(cpu_v7_dcache_clean_area)
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#ifdef CONFIG_ARM_PSCI
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.arch_extension sec
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ENTRY(cpu_v7_smc_switch_mm)
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stmfd sp!, {r0 - r3}
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movw r0, #:lower16:ARM_SMCCC_ARCH_WORKAROUND_1
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movt r0, #:upper16:ARM_SMCCC_ARCH_WORKAROUND_1
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smc #0
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ldmfd sp!, {r0 - r3}
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b cpu_v7_switch_mm
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ENDPROC(cpu_v7_smc_switch_mm)
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.arch_extension virt
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ENTRY(cpu_v7_hvc_switch_mm)
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stmfd sp!, {r0 - r3}
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movw r0, #:lower16:ARM_SMCCC_ARCH_WORKAROUND_1
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movt r0, #:upper16:ARM_SMCCC_ARCH_WORKAROUND_1
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hvc #0
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ldmfd sp!, {r0 - r3}
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b cpu_v7_switch_mm
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ENDPROC(cpu_v7_hvc_switch_mm)
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#endif
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ENTRY(cpu_v7_iciallu_switch_mm)
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mov r3, #0
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mcr p15, 0, r3, c7, c5, 0 @ ICIALLU
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b cpu_v7_switch_mm
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ENDPROC(cpu_v7_iciallu_switch_mm)
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ENTRY(cpu_v7_bpiall_switch_mm)
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mov r3, #0
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mcr p15, 0, r3, c7, c5, 6 @ flush BTAC/BTB
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b cpu_v7_switch_mm
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ENDPROC(cpu_v7_bpiall_switch_mm)
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string cpu_v7_name, "ARMv7 Processor"
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.align
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/* Suspend/resume support: derived from arch/arm/mach-s5pv210/sleep.S */
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.globl cpu_v7_suspend_size
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.equ cpu_v7_suspend_size, 4 * 9
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#ifdef CONFIG_ARM_CPU_SUSPEND
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ENTRY(cpu_v7_do_suspend)
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stmfd sp!, {r4 - r11, lr}
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mrc p15, 0, r4, c13, c0, 0 @ FCSE/PID
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mrc p15, 0, r5, c13, c0, 3 @ User r/o thread ID
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stmia r0!, {r4 - r5}
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#ifdef CONFIG_MMU
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mrc p15, 0, r6, c3, c0, 0 @ Domain ID
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#ifdef CONFIG_ARM_LPAE
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mrrc p15, 1, r5, r7, c2 @ TTB 1
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#else
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mrc p15, 0, r7, c2, c0, 1 @ TTB 1
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#endif
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mrc p15, 0, r11, c2, c0, 2 @ TTB control register
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#endif
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mrc p15, 0, r8, c1, c0, 0 @ Control register
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mrc p15, 0, r9, c1, c0, 1 @ Auxiliary control register
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mrc p15, 0, r10, c1, c0, 2 @ Co-processor access control
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stmia r0, {r5 - r11}
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ldmfd sp!, {r4 - r11, pc}
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ENDPROC(cpu_v7_do_suspend)
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ENTRY(cpu_v7_do_resume)
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mov ip, #0
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mcr p15, 0, ip, c7, c5, 0 @ invalidate I cache
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mcr p15, 0, ip, c13, c0, 1 @ set reserved context ID
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ldmia r0!, {r4 - r5}
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mcr p15, 0, r4, c13, c0, 0 @ FCSE/PID
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mcr p15, 0, r5, c13, c0, 3 @ User r/o thread ID
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ldmia r0, {r5 - r11}
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#ifdef CONFIG_MMU
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mcr p15, 0, ip, c8, c7, 0 @ invalidate TLBs
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mcr p15, 0, r6, c3, c0, 0 @ Domain ID
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#ifdef CONFIG_ARM_LPAE
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mcrr p15, 0, r1, ip, c2 @ TTB 0
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mcrr p15, 1, r5, r7, c2 @ TTB 1
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#else
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ALT_SMP(orr r1, r1, #TTB_FLAGS_SMP)
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ALT_UP(orr r1, r1, #TTB_FLAGS_UP)
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mcr p15, 0, r1, c2, c0, 0 @ TTB 0
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mcr p15, 0, r7, c2, c0, 1 @ TTB 1
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#endif
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mcr p15, 0, r11, c2, c0, 2 @ TTB control register
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ldr r4, =PRRR @ PRRR
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ldr r5, =NMRR @ NMRR
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mcr p15, 0, r4, c10, c2, 0 @ write PRRR
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mcr p15, 0, r5, c10, c2, 1 @ write NMRR
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#endif /* CONFIG_MMU */
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mrc p15, 0, r4, c1, c0, 1 @ Read Auxiliary control register
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teq r4, r9 @ Is it already set?
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mcrne p15, 0, r9, c1, c0, 1 @ No, so write it
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mcr p15, 0, r10, c1, c0, 2 @ Co-processor access control
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isb
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dsb
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mov r0, r8 @ control register
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b cpu_resume_mmu
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ENDPROC(cpu_v7_do_resume)
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#endif
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.globl cpu_ca9mp_suspend_size
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.equ cpu_ca9mp_suspend_size, cpu_v7_suspend_size + 4 * 2
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#ifdef CONFIG_ARM_CPU_SUSPEND
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ENTRY(cpu_ca9mp_do_suspend)
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stmfd sp!, {r4 - r5}
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mrc p15, 0, r4, c15, c0, 1 @ Diagnostic register
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mrc p15, 0, r5, c15, c0, 0 @ Power register
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stmia r0!, {r4 - r5}
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ldmfd sp!, {r4 - r5}
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b cpu_v7_do_suspend
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ENDPROC(cpu_ca9mp_do_suspend)
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ENTRY(cpu_ca9mp_do_resume)
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ldmia r0!, {r4 - r5}
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mrc p15, 0, r10, c15, c0, 1 @ Read Diagnostic register
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teq r4, r10 @ Already restored?
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mcrne p15, 0, r4, c15, c0, 1 @ No, so restore it
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mrc p15, 0, r10, c15, c0, 0 @ Read Power register
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teq r5, r10 @ Already restored?
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mcrne p15, 0, r5, c15, c0, 0 @ No, so restore it
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b cpu_v7_do_resume
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ENDPROC(cpu_ca9mp_do_resume)
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#endif
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#ifdef CONFIG_CPU_PJ4B
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globl_equ cpu_pj4b_switch_mm, cpu_v7_switch_mm
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globl_equ cpu_pj4b_set_pte_ext, cpu_v7_set_pte_ext
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globl_equ cpu_pj4b_proc_init, cpu_v7_proc_init
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globl_equ cpu_pj4b_proc_fin, cpu_v7_proc_fin
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globl_equ cpu_pj4b_reset, cpu_v7_reset
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#ifdef CONFIG_PJ4B_ERRATA_4742
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ENTRY(cpu_pj4b_do_idle)
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dsb @ WFI may enter a low-power mode
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wfi
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dsb @barrier
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ret lr
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ENDPROC(cpu_pj4b_do_idle)
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#else
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globl_equ cpu_pj4b_do_idle, cpu_v7_do_idle
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#endif
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globl_equ cpu_pj4b_dcache_clean_area, cpu_v7_dcache_clean_area
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#ifdef CONFIG_ARM_CPU_SUSPEND
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ENTRY(cpu_pj4b_do_suspend)
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stmfd sp!, {r6 - r10}
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mrc p15, 1, r6, c15, c1, 0 @ save CP15 - extra features
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mrc p15, 1, r7, c15, c2, 0 @ save CP15 - Aux Func Modes Ctrl 0
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mrc p15, 1, r8, c15, c1, 2 @ save CP15 - Aux Debug Modes Ctrl 2
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mrc p15, 1, r9, c15, c1, 1 @ save CP15 - Aux Debug Modes Ctrl 1
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mrc p15, 0, r10, c9, c14, 0 @ save CP15 - PMC
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stmia r0!, {r6 - r10}
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ldmfd sp!, {r6 - r10}
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b cpu_v7_do_suspend
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ENDPROC(cpu_pj4b_do_suspend)
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ENTRY(cpu_pj4b_do_resume)
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ldmia r0!, {r6 - r10}
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mcr p15, 1, r6, c15, c1, 0 @ restore CP15 - extra features
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mcr p15, 1, r7, c15, c2, 0 @ restore CP15 - Aux Func Modes Ctrl 0
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mcr p15, 1, r8, c15, c1, 2 @ restore CP15 - Aux Debug Modes Ctrl 2
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mcr p15, 1, r9, c15, c1, 1 @ restore CP15 - Aux Debug Modes Ctrl 1
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mcr p15, 0, r10, c9, c14, 0 @ restore CP15 - PMC
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b cpu_v7_do_resume
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ENDPROC(cpu_pj4b_do_resume)
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#endif
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.globl cpu_pj4b_suspend_size
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.equ cpu_pj4b_suspend_size, cpu_v7_suspend_size + 4 * 5
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#endif
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/*
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* __v7_setup
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*
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* Initialise TLB, Caches, and MMU state ready to switch the MMU
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* on. Return in r0 the new CP15 C1 control register setting.
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*
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* r1, r2, r4, r5, r9, r13 must be preserved - r13 is not a stack
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* r4: TTBR0 (low word)
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* r5: TTBR0 (high word if LPAE)
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* r8: TTBR1
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* r9: Main ID register
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*
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* This should be able to cover all ARMv7 cores.
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*
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* It is assumed that:
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* - cache type register is implemented
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*/
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__v7_ca5mp_setup:
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__v7_ca9mp_setup:
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__v7_cr7mp_setup:
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__v7_cr8mp_setup:
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mov r10, #(1 << 0) @ Cache/TLB ops broadcasting
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b 1f
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__v7_ca7mp_setup:
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__v7_ca12mp_setup:
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__v7_ca15mp_setup:
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__v7_b15mp_setup:
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__v7_ca17mp_setup:
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mov r10, #0
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1: adr r0, __v7_setup_stack_ptr
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ldr r12, [r0]
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add r12, r12, r0 @ the local stack
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stmia r12, {r1-r6, lr} @ v7_invalidate_l1 touches r0-r6
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bl v7_invalidate_l1
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ldmia r12, {r1-r6, lr}
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#ifdef CONFIG_SMP
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orr r10, r10, #(1 << 6) @ Enable SMP/nAMP mode
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ALT_SMP(mrc p15, 0, r0, c1, c0, 1)
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ALT_UP(mov r0, r10) @ fake it for UP
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orr r10, r10, r0 @ Set required bits
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teq r10, r0 @ Were they already set?
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mcrne p15, 0, r10, c1, c0, 1 @ No, update register
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#endif
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b __v7_setup_cont
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/*
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* Errata:
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* r0, r10 available for use
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* r1, r2, r4, r5, r9, r13: must be preserved
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* r3: contains MIDR rX number in bits 23-20
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* r6: contains MIDR rXpY as 8-bit XY number
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* r9: MIDR
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*/
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__ca8_errata:
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#if defined(CONFIG_ARM_ERRATA_430973) && !defined(CONFIG_ARCH_MULTIPLATFORM)
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teq r3, #0x00100000 @ only present in r1p*
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mrceq p15, 0, r0, c1, c0, 1 @ read aux control register
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orreq r0, r0, #(1 << 6) @ set IBE to 1
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mcreq p15, 0, r0, c1, c0, 1 @ write aux control register
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|
|
#endif
|
||
|
|
#ifdef CONFIG_ARM_ERRATA_458693
|
||
|
|
teq r6, #0x20 @ only present in r2p0
|
||
|
|
mrceq p15, 0, r0, c1, c0, 1 @ read aux control register
|
||
|
|
orreq r0, r0, #(1 << 5) @ set L1NEON to 1
|
||
|
|
orreq r0, r0, #(1 << 9) @ set PLDNOP to 1
|
||
|
|
mcreq p15, 0, r0, c1, c0, 1 @ write aux control register
|
||
|
|
#endif
|
||
|
|
#ifdef CONFIG_ARM_ERRATA_460075
|
||
|
|
teq r6, #0x20 @ only present in r2p0
|
||
|
|
mrceq p15, 1, r0, c9, c0, 2 @ read L2 cache aux ctrl register
|
||
|
|
tsteq r0, #1 << 22
|
||
|
|
orreq r0, r0, #(1 << 22) @ set the Write Allocate disable bit
|
||
|
|
mcreq p15, 1, r0, c9, c0, 2 @ write the L2 cache aux ctrl register
|
||
|
|
#endif
|
||
|
|
b __errata_finish
|
||
|
|
|
||
|
|
__ca9_errata:
|
||
|
|
#ifdef CONFIG_ARM_ERRATA_742230
|
||
|
|
cmp r6, #0x22 @ only present up to r2p2
|
||
|
|
mrcle p15, 0, r0, c15, c0, 1 @ read diagnostic register
|
||
|
|
orrle r0, r0, #1 << 4 @ set bit #4
|
||
|
|
mcrle p15, 0, r0, c15, c0, 1 @ write diagnostic register
|
||
|
|
#endif
|
||
|
|
#ifdef CONFIG_ARM_ERRATA_742231
|
||
|
|
teq r6, #0x20 @ present in r2p0
|
||
|
|
teqne r6, #0x21 @ present in r2p1
|
||
|
|
teqne r6, #0x22 @ present in r2p2
|
||
|
|
mrceq p15, 0, r0, c15, c0, 1 @ read diagnostic register
|
||
|
|
orreq r0, r0, #1 << 12 @ set bit #12
|
||
|
|
orreq r0, r0, #1 << 22 @ set bit #22
|
||
|
|
mcreq p15, 0, r0, c15, c0, 1 @ write diagnostic register
|
||
|
|
#endif
|
||
|
|
#ifdef CONFIG_ARM_ERRATA_743622
|
||
|
|
teq r3, #0x00200000 @ only present in r2p*
|
||
|
|
mrceq p15, 0, r0, c15, c0, 1 @ read diagnostic register
|
||
|
|
orreq r0, r0, #1 << 6 @ set bit #6
|
||
|
|
mcreq p15, 0, r0, c15, c0, 1 @ write diagnostic register
|
||
|
|
#endif
|
||
|
|
#if defined(CONFIG_ARM_ERRATA_751472) && defined(CONFIG_SMP)
|
||
|
|
ALT_SMP(cmp r6, #0x30) @ present prior to r3p0
|
||
|
|
ALT_UP_B(1f)
|
||
|
|
mrclt p15, 0, r0, c15, c0, 1 @ read diagnostic register
|
||
|
|
orrlt r0, r0, #1 << 11 @ set bit #11
|
||
|
|
mcrlt p15, 0, r0, c15, c0, 1 @ write diagnostic register
|
||
|
|
1:
|
||
|
|
#endif
|
||
|
|
b __errata_finish
|
||
|
|
|
||
|
|
__ca15_errata:
|
||
|
|
#ifdef CONFIG_ARM_ERRATA_773022
|
||
|
|
cmp r6, #0x4 @ only present up to r0p4
|
||
|
|
mrcle p15, 0, r0, c1, c0, 1 @ read aux control register
|
||
|
|
orrle r0, r0, #1 << 1 @ disable loop buffer
|
||
|
|
mcrle p15, 0, r0, c1, c0, 1 @ write aux control register
|
||
|
|
#endif
|
||
|
|
b __errata_finish
|
||
|
|
|
||
|
|
__ca12_errata:
|
||
|
|
#ifdef CONFIG_ARM_ERRATA_818325_852422
|
||
|
|
mrc p15, 0, r10, c15, c0, 1 @ read diagnostic register
|
||
|
|
orr r10, r10, #1 << 12 @ set bit #12
|
||
|
|
mcr p15, 0, r10, c15, c0, 1 @ write diagnostic register
|
||
|
|
#endif
|
||
|
|
#ifdef CONFIG_ARM_ERRATA_821420
|
||
|
|
mrc p15, 0, r10, c15, c0, 2 @ read internal feature reg
|
||
|
|
orr r10, r10, #1 << 1 @ set bit #1
|
||
|
|
mcr p15, 0, r10, c15, c0, 2 @ write internal feature reg
|
||
|
|
#endif
|
||
|
|
#ifdef CONFIG_ARM_ERRATA_825619
|
||
|
|
mrc p15, 0, r10, c15, c0, 1 @ read diagnostic register
|
||
|
|
orr r10, r10, #1 << 24 @ set bit #24
|
||
|
|
mcr p15, 0, r10, c15, c0, 1 @ write diagnostic register
|
||
|
|
#endif
|
||
|
|
#ifdef CONFIG_ARM_ERRATA_857271
|
||
|
|
mrc p15, 0, r10, c15, c0, 1 @ read diagnostic register
|
||
|
|
orr r10, r10, #3 << 10 @ set bits #10 and #11
|
||
|
|
mcr p15, 0, r10, c15, c0, 1 @ write diagnostic register
|
||
|
|
#endif
|
||
|
|
b __errata_finish
|
||
|
|
|
||
|
|
__ca17_errata:
|
||
|
|
#ifdef CONFIG_ARM_ERRATA_852421
|
||
|
|
cmp r6, #0x12 @ only present up to r1p2
|
||
|
|
mrcle p15, 0, r10, c15, c0, 1 @ read diagnostic register
|
||
|
|
orrle r10, r10, #1 << 24 @ set bit #24
|
||
|
|
mcrle p15, 0, r10, c15, c0, 1 @ write diagnostic register
|
||
|
|
#endif
|
||
|
|
#ifdef CONFIG_ARM_ERRATA_852423
|
||
|
|
cmp r6, #0x12 @ only present up to r1p2
|
||
|
|
mrcle p15, 0, r10, c15, c0, 1 @ read diagnostic register
|
||
|
|
orrle r10, r10, #1 << 12 @ set bit #12
|
||
|
|
mcrle p15, 0, r10, c15, c0, 1 @ write diagnostic register
|
||
|
|
#endif
|
||
|
|
#ifdef CONFIG_ARM_ERRATA_857272
|
||
|
|
mrc p15, 0, r10, c15, c0, 1 @ read diagnostic register
|
||
|
|
orr r10, r10, #3 << 10 @ set bits #10 and #11
|
||
|
|
mcr p15, 0, r10, c15, c0, 1 @ write diagnostic register
|
||
|
|
#endif
|
||
|
|
b __errata_finish
|
||
|
|
|
||
|
|
__v7_pj4b_setup:
|
||
|
|
#ifdef CONFIG_CPU_PJ4B
|
||
|
|
|
||
|
|
/* Auxiliary Debug Modes Control 1 Register */
|
||
|
|
#define PJ4B_STATIC_BP (1 << 2) /* Enable Static BP */
|
||
|
|
#define PJ4B_INTER_PARITY (1 << 8) /* Disable Internal Parity Handling */
|
||
|
|
#define PJ4B_CLEAN_LINE (1 << 16) /* Disable data transfer for clean line */
|
||
|
|
|
||
|
|
/* Auxiliary Debug Modes Control 2 Register */
|
||
|
|
#define PJ4B_FAST_LDR (1 << 23) /* Disable fast LDR */
|
||
|
|
#define PJ4B_SNOOP_DATA (1 << 25) /* Do not interleave write and snoop data */
|
||
|
|
#define PJ4B_CWF (1 << 27) /* Disable Critical Word First feature */
|
||
|
|
#define PJ4B_OUTSDNG_NC (1 << 29) /* Disable outstanding non cacheable rqst */
|
||
|
|
#define PJ4B_L1_REP_RR (1 << 30) /* L1 replacement - Strict round robin */
|
||
|
|
#define PJ4B_AUX_DBG_CTRL2 (PJ4B_SNOOP_DATA | PJ4B_CWF |\
|
||
|
|
PJ4B_OUTSDNG_NC | PJ4B_L1_REP_RR)
|
||
|
|
|
||
|
|
/* Auxiliary Functional Modes Control Register 0 */
|
||
|
|
#define PJ4B_SMP_CFB (1 << 1) /* Set SMP mode. Join the coherency fabric */
|
||
|
|
#define PJ4B_L1_PAR_CHK (1 << 2) /* Support L1 parity checking */
|
||
|
|
#define PJ4B_BROADCAST_CACHE (1 << 8) /* Broadcast Cache and TLB maintenance */
|
||
|
|
|
||
|
|
/* Auxiliary Debug Modes Control 0 Register */
|
||
|
|
#define PJ4B_WFI_WFE (1 << 22) /* WFI/WFE - serve the DVM and back to idle */
|
||
|
|
|
||
|
|
/* Auxiliary Debug Modes Control 1 Register */
|
||
|
|
mrc p15, 1, r0, c15, c1, 1
|
||
|
|
orr r0, r0, #PJ4B_CLEAN_LINE
|
||
|
|
orr r0, r0, #PJ4B_INTER_PARITY
|
||
|
|
bic r0, r0, #PJ4B_STATIC_BP
|
||
|
|
mcr p15, 1, r0, c15, c1, 1
|
||
|
|
|
||
|
|
/* Auxiliary Debug Modes Control 2 Register */
|
||
|
|
mrc p15, 1, r0, c15, c1, 2
|
||
|
|
bic r0, r0, #PJ4B_FAST_LDR
|
||
|
|
orr r0, r0, #PJ4B_AUX_DBG_CTRL2
|
||
|
|
mcr p15, 1, r0, c15, c1, 2
|
||
|
|
|
||
|
|
/* Auxiliary Functional Modes Control Register 0 */
|
||
|
|
mrc p15, 1, r0, c15, c2, 0
|
||
|
|
#ifdef CONFIG_SMP
|
||
|
|
orr r0, r0, #PJ4B_SMP_CFB
|
||
|
|
#endif
|
||
|
|
orr r0, r0, #PJ4B_L1_PAR_CHK
|
||
|
|
orr r0, r0, #PJ4B_BROADCAST_CACHE
|
||
|
|
mcr p15, 1, r0, c15, c2, 0
|
||
|
|
|
||
|
|
/* Auxiliary Debug Modes Control 0 Register */
|
||
|
|
mrc p15, 1, r0, c15, c1, 0
|
||
|
|
orr r0, r0, #PJ4B_WFI_WFE
|
||
|
|
mcr p15, 1, r0, c15, c1, 0
|
||
|
|
|
||
|
|
#endif /* CONFIG_CPU_PJ4B */
|
||
|
|
|
||
|
|
__v7_setup:
|
||
|
|
adr r0, __v7_setup_stack_ptr
|
||
|
|
ldr r12, [r0]
|
||
|
|
add r12, r12, r0 @ the local stack
|
||
|
|
stmia r12, {r1-r6, lr} @ v7_invalidate_l1 touches r0-r6
|
||
|
|
bl v7_invalidate_l1
|
||
|
|
ldmia r12, {r1-r6, lr}
|
||
|
|
|
||
|
|
__v7_setup_cont:
|
||
|
|
and r0, r9, #0xff000000 @ ARM?
|
||
|
|
teq r0, #0x41000000
|
||
|
|
bne __errata_finish
|
||
|
|
and r3, r9, #0x00f00000 @ variant
|
||
|
|
and r6, r9, #0x0000000f @ revision
|
||
|
|
orr r6, r6, r3, lsr #20-4 @ combine variant and revision
|
||
|
|
ubfx r0, r9, #4, #12 @ primary part number
|
||
|
|
|
||
|
|
/* Cortex-A8 Errata */
|
||
|
|
ldr r10, =0x00000c08 @ Cortex-A8 primary part number
|
||
|
|
teq r0, r10
|
||
|
|
beq __ca8_errata
|
||
|
|
|
||
|
|
/* Cortex-A9 Errata */
|
||
|
|
ldr r10, =0x00000c09 @ Cortex-A9 primary part number
|
||
|
|
teq r0, r10
|
||
|
|
beq __ca9_errata
|
||
|
|
|
||
|
|
/* Cortex-A12 Errata */
|
||
|
|
ldr r10, =0x00000c0d @ Cortex-A12 primary part number
|
||
|
|
teq r0, r10
|
||
|
|
beq __ca12_errata
|
||
|
|
|
||
|
|
/* Cortex-A17 Errata */
|
||
|
|
ldr r10, =0x00000c0e @ Cortex-A17 primary part number
|
||
|
|
teq r0, r10
|
||
|
|
beq __ca17_errata
|
||
|
|
|
||
|
|
/* Cortex-A15 Errata */
|
||
|
|
ldr r10, =0x00000c0f @ Cortex-A15 primary part number
|
||
|
|
teq r0, r10
|
||
|
|
beq __ca15_errata
|
||
|
|
|
||
|
|
__errata_finish:
|
||
|
|
mov r10, #0
|
||
|
|
mcr p15, 0, r10, c7, c5, 0 @ I+BTB cache invalidate
|
||
|
|
#ifdef CONFIG_MMU
|
||
|
|
mcr p15, 0, r10, c8, c7, 0 @ invalidate I + D TLBs
|
||
|
|
v7_ttb_setup r10, r4, r5, r8, r3 @ TTBCR, TTBRx setup
|
||
|
|
ldr r3, =PRRR @ PRRR
|
||
|
|
ldr r6, =NMRR @ NMRR
|
||
|
|
mcr p15, 0, r3, c10, c2, 0 @ write PRRR
|
||
|
|
mcr p15, 0, r6, c10, c2, 1 @ write NMRR
|
||
|
|
#endif
|
||
|
|
dsb @ Complete invalidations
|
||
|
|
#ifndef CONFIG_ARM_THUMBEE
|
||
|
|
mrc p15, 0, r0, c0, c1, 0 @ read ID_PFR0 for ThumbEE
|
||
|
|
and r0, r0, #(0xf << 12) @ ThumbEE enabled field
|
||
|
|
teq r0, #(1 << 12) @ check if ThumbEE is present
|
||
|
|
bne 1f
|
||
|
|
mov r3, #0
|
||
|
|
mcr p14, 6, r3, c1, c0, 0 @ Initialize TEEHBR to 0
|
||
|
|
mrc p14, 6, r0, c0, c0, 0 @ load TEECR
|
||
|
|
orr r0, r0, #1 @ set the 1st bit in order to
|
||
|
|
mcr p14, 6, r0, c0, c0, 0 @ stop userspace TEEHBR access
|
||
|
|
1:
|
||
|
|
#endif
|
||
|
|
adr r3, v7_crval
|
||
|
|
ldmia r3, {r3, r6}
|
||
|
|
ARM_BE8(orr r6, r6, #1 << 25) @ big-endian page tables
|
||
|
|
#ifdef CONFIG_SWP_EMULATE
|
||
|
|
orr r3, r3, #(1 << 10) @ set SW bit in "clear"
|
||
|
|
bic r6, r6, #(1 << 10) @ clear it in "mmuset"
|
||
|
|
#endif
|
||
|
|
mrc p15, 0, r0, c1, c0, 0 @ read control register
|
||
|
|
bic r0, r0, r3 @ clear bits them
|
||
|
|
orr r0, r0, r6 @ set them
|
||
|
|
THUMB( orr r0, r0, #1 << 30 ) @ Thumb exceptions
|
||
|
|
ret lr @ return to head.S:__ret
|
||
|
|
|
||
|
|
.align 2
|
||
|
|
__v7_setup_stack_ptr:
|
||
|
|
.word PHYS_RELATIVE(__v7_setup_stack, .)
|
||
|
|
ENDPROC(__v7_setup)
|
||
|
|
|
||
|
|
.bss
|
||
|
|
.align 2
|
||
|
|
__v7_setup_stack:
|
||
|
|
.space 4 * 7 @ 7 registers
|
||
|
|
|
||
|
|
__INITDATA
|
||
|
|
|
||
|
|
.weak cpu_v7_bugs_init
|
||
|
|
|
||
|
|
@ define struct processor (see <asm/proc-fns.h> and proc-macros.S)
|
||
|
|
define_processor_functions v7, dabort=v7_early_abort, pabort=v7_pabort, suspend=1, bugs=cpu_v7_bugs_init
|
||
|
|
|
||
|
|
#ifdef CONFIG_HARDEN_BRANCH_PREDICTOR
|
||
|
|
@ generic v7 bpiall on context switch
|
||
|
|
globl_equ cpu_v7_bpiall_proc_init, cpu_v7_proc_init
|
||
|
|
globl_equ cpu_v7_bpiall_proc_fin, cpu_v7_proc_fin
|
||
|
|
globl_equ cpu_v7_bpiall_reset, cpu_v7_reset
|
||
|
|
globl_equ cpu_v7_bpiall_do_idle, cpu_v7_do_idle
|
||
|
|
globl_equ cpu_v7_bpiall_dcache_clean_area, cpu_v7_dcache_clean_area
|
||
|
|
globl_equ cpu_v7_bpiall_set_pte_ext, cpu_v7_set_pte_ext
|
||
|
|
globl_equ cpu_v7_bpiall_suspend_size, cpu_v7_suspend_size
|
||
|
|
#ifdef CONFIG_ARM_CPU_SUSPEND
|
||
|
|
globl_equ cpu_v7_bpiall_do_suspend, cpu_v7_do_suspend
|
||
|
|
globl_equ cpu_v7_bpiall_do_resume, cpu_v7_do_resume
|
||
|
|
#endif
|
||
|
|
define_processor_functions v7_bpiall, dabort=v7_early_abort, pabort=v7_pabort, suspend=1, bugs=cpu_v7_bugs_init
|
||
|
|
|
||
|
|
#define HARDENED_BPIALL_PROCESSOR_FUNCTIONS v7_bpiall_processor_functions
|
||
|
|
#else
|
||
|
|
#define HARDENED_BPIALL_PROCESSOR_FUNCTIONS v7_processor_functions
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#ifndef CONFIG_ARM_LPAE
|
||
|
|
@ Cortex-A8 - always needs bpiall switch_mm implementation
|
||
|
|
globl_equ cpu_ca8_proc_init, cpu_v7_proc_init
|
||
|
|
globl_equ cpu_ca8_proc_fin, cpu_v7_proc_fin
|
||
|
|
globl_equ cpu_ca8_reset, cpu_v7_reset
|
||
|
|
globl_equ cpu_ca8_do_idle, cpu_v7_do_idle
|
||
|
|
globl_equ cpu_ca8_dcache_clean_area, cpu_v7_dcache_clean_area
|
||
|
|
globl_equ cpu_ca8_set_pte_ext, cpu_v7_set_pte_ext
|
||
|
|
globl_equ cpu_ca8_switch_mm, cpu_v7_bpiall_switch_mm
|
||
|
|
globl_equ cpu_ca8_suspend_size, cpu_v7_suspend_size
|
||
|
|
#ifdef CONFIG_ARM_CPU_SUSPEND
|
||
|
|
globl_equ cpu_ca8_do_suspend, cpu_v7_do_suspend
|
||
|
|
globl_equ cpu_ca8_do_resume, cpu_v7_do_resume
|
||
|
|
#endif
|
||
|
|
define_processor_functions ca8, dabort=v7_early_abort, pabort=v7_pabort, suspend=1, bugs=cpu_v7_ca8_ibe
|
||
|
|
|
||
|
|
@ Cortex-A9 - needs more registers preserved across suspend/resume
|
||
|
|
@ and bpiall switch_mm for hardening
|
||
|
|
globl_equ cpu_ca9mp_proc_init, cpu_v7_proc_init
|
||
|
|
globl_equ cpu_ca9mp_proc_fin, cpu_v7_proc_fin
|
||
|
|
globl_equ cpu_ca9mp_reset, cpu_v7_reset
|
||
|
|
globl_equ cpu_ca9mp_do_idle, cpu_v7_do_idle
|
||
|
|
globl_equ cpu_ca9mp_dcache_clean_area, cpu_v7_dcache_clean_area
|
||
|
|
#ifdef CONFIG_HARDEN_BRANCH_PREDICTOR
|
||
|
|
globl_equ cpu_ca9mp_switch_mm, cpu_v7_bpiall_switch_mm
|
||
|
|
#else
|
||
|
|
globl_equ cpu_ca9mp_switch_mm, cpu_v7_switch_mm
|
||
|
|
#endif
|
||
|
|
globl_equ cpu_ca9mp_set_pte_ext, cpu_v7_set_pte_ext
|
||
|
|
define_processor_functions ca9mp, dabort=v7_early_abort, pabort=v7_pabort, suspend=1, bugs=cpu_v7_bugs_init
|
||
|
|
#endif
|
||
|
|
|
||
|
|
@ Cortex-A15 - needs iciallu switch_mm for hardening
|
||
|
|
globl_equ cpu_ca15_proc_init, cpu_v7_proc_init
|
||
|
|
globl_equ cpu_ca15_proc_fin, cpu_v7_proc_fin
|
||
|
|
globl_equ cpu_ca15_reset, cpu_v7_reset
|
||
|
|
globl_equ cpu_ca15_do_idle, cpu_v7_do_idle
|
||
|
|
globl_equ cpu_ca15_dcache_clean_area, cpu_v7_dcache_clean_area
|
||
|
|
#ifdef CONFIG_HARDEN_BRANCH_PREDICTOR
|
||
|
|
globl_equ cpu_ca15_switch_mm, cpu_v7_iciallu_switch_mm
|
||
|
|
#else
|
||
|
|
globl_equ cpu_ca15_switch_mm, cpu_v7_switch_mm
|
||
|
|
#endif
|
||
|
|
globl_equ cpu_ca15_set_pte_ext, cpu_v7_set_pte_ext
|
||
|
|
globl_equ cpu_ca15_suspend_size, cpu_v7_suspend_size
|
||
|
|
globl_equ cpu_ca15_do_suspend, cpu_v7_do_suspend
|
||
|
|
globl_equ cpu_ca15_do_resume, cpu_v7_do_resume
|
||
|
|
define_processor_functions ca15, dabort=v7_early_abort, pabort=v7_pabort, suspend=1, bugs=cpu_v7_ca15_ibe
|
||
|
|
#ifdef CONFIG_CPU_PJ4B
|
||
|
|
define_processor_functions pj4b, dabort=v7_early_abort, pabort=v7_pabort, suspend=1
|
||
|
|
#endif
|
||
|
|
|
||
|
|
.section ".rodata"
|
||
|
|
|
||
|
|
string cpu_arch_name, "armv7"
|
||
|
|
string cpu_elf_name, "v7"
|
||
|
|
.align
|
||
|
|
|
||
|
|
.section ".proc.info.init", #alloc
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Standard v7 proc info content
|
||
|
|
*/
|
||
|
|
.macro __v7_proc name, initfunc, mm_mmuflags = 0, io_mmuflags = 0, hwcaps = 0, proc_fns = v7_processor_functions, cache_fns = v7_cache_fns
|
||
|
|
ALT_SMP(.long PMD_TYPE_SECT | PMD_SECT_AP_WRITE | PMD_SECT_AP_READ | \
|
||
|
|
PMD_SECT_AF | PMD_FLAGS_SMP | \mm_mmuflags)
|
||
|
|
ALT_UP(.long PMD_TYPE_SECT | PMD_SECT_AP_WRITE | PMD_SECT_AP_READ | \
|
||
|
|
PMD_SECT_AF | PMD_FLAGS_UP | \mm_mmuflags)
|
||
|
|
.long PMD_TYPE_SECT | PMD_SECT_AP_WRITE | \
|
||
|
|
PMD_SECT_AP_READ | PMD_SECT_AF | \io_mmuflags
|
||
|
|
initfn \initfunc, \name
|
||
|
|
.long cpu_arch_name
|
||
|
|
.long cpu_elf_name
|
||
|
|
.long HWCAP_SWP | HWCAP_HALF | HWCAP_THUMB | HWCAP_FAST_MULT | \
|
||
|
|
HWCAP_EDSP | HWCAP_TLS | \hwcaps
|
||
|
|
.long cpu_v7_name
|
||
|
|
.long \proc_fns
|
||
|
|
.long v7wbi_tlb_fns
|
||
|
|
.long v6_user_fns
|
||
|
|
.long \cache_fns
|
||
|
|
.endm
|
||
|
|
|
||
|
|
#ifndef CONFIG_ARM_LPAE
|
||
|
|
/*
|
||
|
|
* ARM Ltd. Cortex A5 processor.
|
||
|
|
*/
|
||
|
|
.type __v7_ca5mp_proc_info, #object
|
||
|
|
__v7_ca5mp_proc_info:
|
||
|
|
.long 0x410fc050
|
||
|
|
.long 0xff0ffff0
|
||
|
|
__v7_proc __v7_ca5mp_proc_info, __v7_ca5mp_setup
|
||
|
|
.size __v7_ca5mp_proc_info, . - __v7_ca5mp_proc_info
|
||
|
|
|
||
|
|
/*
|
||
|
|
* ARM Ltd. Cortex A9 processor.
|
||
|
|
*/
|
||
|
|
.type __v7_ca9mp_proc_info, #object
|
||
|
|
__v7_ca9mp_proc_info:
|
||
|
|
.long 0x410fc090
|
||
|
|
.long 0xff0ffff0
|
||
|
|
__v7_proc __v7_ca9mp_proc_info, __v7_ca9mp_setup, proc_fns = ca9mp_processor_functions
|
||
|
|
.size __v7_ca9mp_proc_info, . - __v7_ca9mp_proc_info
|
||
|
|
|
||
|
|
/*
|
||
|
|
* ARM Ltd. Cortex A8 processor.
|
||
|
|
*/
|
||
|
|
.type __v7_ca8_proc_info, #object
|
||
|
|
__v7_ca8_proc_info:
|
||
|
|
.long 0x410fc080
|
||
|
|
.long 0xff0ffff0
|
||
|
|
__v7_proc __v7_ca8_proc_info, __v7_setup, proc_fns = ca8_processor_functions
|
||
|
|
.size __v7_ca8_proc_info, . - __v7_ca8_proc_info
|
||
|
|
|
||
|
|
#endif /* CONFIG_ARM_LPAE */
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Marvell PJ4B processor.
|
||
|
|
*/
|
||
|
|
#ifdef CONFIG_CPU_PJ4B
|
||
|
|
.type __v7_pj4b_proc_info, #object
|
||
|
|
__v7_pj4b_proc_info:
|
||
|
|
.long 0x560f5800
|
||
|
|
.long 0xff0fff00
|
||
|
|
__v7_proc __v7_pj4b_proc_info, __v7_pj4b_setup, proc_fns = pj4b_processor_functions
|
||
|
|
.size __v7_pj4b_proc_info, . - __v7_pj4b_proc_info
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/*
|
||
|
|
* ARM Ltd. Cortex R7 processor.
|
||
|
|
*/
|
||
|
|
.type __v7_cr7mp_proc_info, #object
|
||
|
|
__v7_cr7mp_proc_info:
|
||
|
|
.long 0x410fc170
|
||
|
|
.long 0xff0ffff0
|
||
|
|
__v7_proc __v7_cr7mp_proc_info, __v7_cr7mp_setup
|
||
|
|
.size __v7_cr7mp_proc_info, . - __v7_cr7mp_proc_info
|
||
|
|
|
||
|
|
/*
|
||
|
|
* ARM Ltd. Cortex R8 processor.
|
||
|
|
*/
|
||
|
|
.type __v7_cr8mp_proc_info, #object
|
||
|
|
__v7_cr8mp_proc_info:
|
||
|
|
.long 0x410fc180
|
||
|
|
.long 0xff0ffff0
|
||
|
|
__v7_proc __v7_cr8mp_proc_info, __v7_cr8mp_setup
|
||
|
|
.size __v7_cr8mp_proc_info, . - __v7_cr8mp_proc_info
|
||
|
|
|
||
|
|
/*
|
||
|
|
* ARM Ltd. Cortex A7 processor.
|
||
|
|
*/
|
||
|
|
.type __v7_ca7mp_proc_info, #object
|
||
|
|
__v7_ca7mp_proc_info:
|
||
|
|
.long 0x410fc070
|
||
|
|
.long 0xff0ffff0
|
||
|
|
__v7_proc __v7_ca7mp_proc_info, __v7_ca7mp_setup
|
||
|
|
.size __v7_ca7mp_proc_info, . - __v7_ca7mp_proc_info
|
||
|
|
|
||
|
|
/*
|
||
|
|
* ARM Ltd. Cortex A12 processor.
|
||
|
|
*/
|
||
|
|
.type __v7_ca12mp_proc_info, #object
|
||
|
|
__v7_ca12mp_proc_info:
|
||
|
|
.long 0x410fc0d0
|
||
|
|
.long 0xff0ffff0
|
||
|
|
__v7_proc __v7_ca12mp_proc_info, __v7_ca12mp_setup, proc_fns = HARDENED_BPIALL_PROCESSOR_FUNCTIONS
|
||
|
|
.size __v7_ca12mp_proc_info, . - __v7_ca12mp_proc_info
|
||
|
|
|
||
|
|
/*
|
||
|
|
* ARM Ltd. Cortex A15 processor.
|
||
|
|
*/
|
||
|
|
.type __v7_ca15mp_proc_info, #object
|
||
|
|
__v7_ca15mp_proc_info:
|
||
|
|
.long 0x410fc0f0
|
||
|
|
.long 0xff0ffff0
|
||
|
|
__v7_proc __v7_ca15mp_proc_info, __v7_ca15mp_setup, proc_fns = ca15_processor_functions
|
||
|
|
.size __v7_ca15mp_proc_info, . - __v7_ca15mp_proc_info
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Broadcom Corporation Brahma-B15 processor.
|
||
|
|
*/
|
||
|
|
.type __v7_b15mp_proc_info, #object
|
||
|
|
__v7_b15mp_proc_info:
|
||
|
|
.long 0x420f00f0
|
||
|
|
.long 0xff0ffff0
|
||
|
|
__v7_proc __v7_b15mp_proc_info, __v7_b15mp_setup, proc_fns = ca15_processor_functions, cache_fns = b15_cache_fns
|
||
|
|
.size __v7_b15mp_proc_info, . - __v7_b15mp_proc_info
|
||
|
|
|
||
|
|
/*
|
||
|
|
* ARM Ltd. Cortex A17 processor.
|
||
|
|
*/
|
||
|
|
.type __v7_ca17mp_proc_info, #object
|
||
|
|
__v7_ca17mp_proc_info:
|
||
|
|
.long 0x410fc0e0
|
||
|
|
.long 0xff0ffff0
|
||
|
|
__v7_proc __v7_ca17mp_proc_info, __v7_ca17mp_setup, proc_fns = HARDENED_BPIALL_PROCESSOR_FUNCTIONS
|
||
|
|
.size __v7_ca17mp_proc_info, . - __v7_ca17mp_proc_info
|
||
|
|
|
||
|
|
/* ARM Ltd. Cortex A73 processor */
|
||
|
|
.type __v7_ca73_proc_info, #object
|
||
|
|
__v7_ca73_proc_info:
|
||
|
|
.long 0x410fd090
|
||
|
|
.long 0xff0ffff0
|
||
|
|
__v7_proc __v7_ca73_proc_info, __v7_setup, proc_fns = HARDENED_BPIALL_PROCESSOR_FUNCTIONS
|
||
|
|
.size __v7_ca73_proc_info, . - __v7_ca73_proc_info
|
||
|
|
|
||
|
|
/* ARM Ltd. Cortex A75 processor */
|
||
|
|
.type __v7_ca75_proc_info, #object
|
||
|
|
__v7_ca75_proc_info:
|
||
|
|
.long 0x410fd0a0
|
||
|
|
.long 0xff0ffff0
|
||
|
|
__v7_proc __v7_ca75_proc_info, __v7_setup, proc_fns = HARDENED_BPIALL_PROCESSOR_FUNCTIONS
|
||
|
|
.size __v7_ca75_proc_info, . - __v7_ca75_proc_info
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Qualcomm Inc. Krait processors.
|
||
|
|
*/
|
||
|
|
.type __krait_proc_info, #object
|
||
|
|
__krait_proc_info:
|
||
|
|
.long 0x510f0400 @ Required ID value
|
||
|
|
.long 0xff0ffc00 @ Mask for ID
|
||
|
|
/*
|
||
|
|
* Some Krait processors don't indicate support for SDIV and UDIV
|
||
|
|
* instructions in the ARM instruction set, even though they actually
|
||
|
|
* do support them. They also don't indicate support for fused multiply
|
||
|
|
* instructions even though they actually do support them.
|
||
|
|
*/
|
||
|
|
__v7_proc __krait_proc_info, __v7_setup, hwcaps = HWCAP_IDIV | HWCAP_VFPv4
|
||
|
|
.size __krait_proc_info, . - __krait_proc_info
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Match any ARMv7 processor core.
|
||
|
|
*/
|
||
|
|
.type __v7_proc_info, #object
|
||
|
|
__v7_proc_info:
|
||
|
|
.long 0x000f0000 @ Required ID value
|
||
|
|
.long 0x000f0000 @ Mask for ID
|
||
|
|
__v7_proc __v7_proc_info, __v7_setup
|
||
|
|
.size __v7_proc_info, . - __v7_proc_info
|