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95731b8ee6
Now that we have reduced the number of registers that we need to preserve when calling v7_invalidate_l1 from the boot code, we can use scratch registers to preserve the remaining ones, and get rid of the mini stack entirely. This works around any issues regarding cache behavior in relation to the uncached accesses to this memory, which is hard to get right in the general case (i.e., both bare metal and under virtualization) While at it, switch v7_invalidate_l1 to using ip as a scratch register instead of r4. This makes the function AAPCS compliant, and removes the need to stash r4 in ip across the call. Acked-by: Nicolas Pitre <nico@fluxnic.net> Signed-off-by: Ard Biesheuvel <ardb@kernel.org> Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
823 lines
25 KiB
ArmAsm
823 lines
25 KiB
ArmAsm
/* 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 <linux/pgtable.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/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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@ Invoke the v7_invalidate_l1() function, which adheres to the AAPCS
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@ rules, and so it may corrupt registers that we need to preserve.
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@
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.macro do_invalidate_l1
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mov r6, r1
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mov r7, r2
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mov r10, lr
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bl v7_invalidate_l1 @ corrupts {r0-r3, ip, lr}
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mov r1, r6
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mov r2, r7
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mov lr, r10
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.endm
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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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do_invalidate_l1
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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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do_invalidate_l1
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mov r10, #0
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1:
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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
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#ifdef CONFIG_ARM_ERRATA_458693
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teq r6, #0x20 @ only present in r2p0
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mrceq p15, 0, r0, c1, c0, 1 @ read aux control register
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orreq r0, r0, #(1 << 5) @ set L1NEON to 1
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orreq r0, r0, #(1 << 9) @ set PLDNOP to 1
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mcreq p15, 0, r0, c1, c0, 1 @ write aux control register
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#endif
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#ifdef CONFIG_ARM_ERRATA_460075
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teq r6, #0x20 @ only present in r2p0
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mrceq p15, 1, r0, c9, c0, 2 @ read L2 cache aux ctrl register
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tsteq r0, #1 << 22
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orreq r0, r0, #(1 << 22) @ set the Write Allocate disable bit
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mcreq p15, 1, r0, c9, c0, 2 @ write the L2 cache aux ctrl register
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#endif
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b __errata_finish
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__ca9_errata:
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#ifdef CONFIG_ARM_ERRATA_742230
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cmp r6, #0x22 @ only present up to r2p2
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mrcle p15, 0, r0, c15, c0, 1 @ read diagnostic register
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orrle r0, r0, #1 << 4 @ set bit #4
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mcrle p15, 0, r0, c15, c0, 1 @ write diagnostic register
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#endif
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#ifdef CONFIG_ARM_ERRATA_742231
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teq r6, #0x20 @ present in r2p0
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teqne r6, #0x21 @ present in r2p1
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teqne r6, #0x22 @ present in r2p2
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mrceq p15, 0, r0, c15, c0, 1 @ read diagnostic register
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orreq r0, r0, #1 << 12 @ set bit #12
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orreq r0, r0, #1 << 22 @ set bit #22
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mcreq p15, 0, r0, c15, c0, 1 @ write diagnostic register
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#endif
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#ifdef CONFIG_ARM_ERRATA_743622
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teq r3, #0x00200000 @ only present in r2p*
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mrceq p15, 0, r0, c15, c0, 1 @ read diagnostic register
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orreq r0, r0, #1 << 6 @ set bit #6
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mcreq p15, 0, r0, c15, c0, 1 @ write diagnostic register
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#endif
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#if defined(CONFIG_ARM_ERRATA_751472) && defined(CONFIG_SMP)
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ALT_SMP(cmp r6, #0x30) @ present prior to r3p0
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ALT_UP_B(1f)
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mrclt p15, 0, r0, c15, c0, 1 @ read diagnostic register
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orrlt r0, r0, #1 << 11 @ set bit #11
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mcrlt p15, 0, r0, c15, c0, 1 @ write diagnostic register
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1:
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#endif
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b __errata_finish
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__ca15_errata:
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#ifdef CONFIG_ARM_ERRATA_773022
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cmp r6, #0x4 @ only present up to r0p4
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mrcle p15, 0, r0, c1, c0, 1 @ read aux control register
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orrle r0, r0, #1 << 1 @ disable loop buffer
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mcrle p15, 0, r0, c1, c0, 1 @ write aux control register
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#endif
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b __errata_finish
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__ca12_errata:
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#ifdef CONFIG_ARM_ERRATA_818325_852422
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mrc p15, 0, r10, c15, c0, 1 @ read diagnostic register
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orr r10, r10, #1 << 12 @ set bit #12
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mcr p15, 0, r10, c15, c0, 1 @ write diagnostic register
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#endif
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#ifdef CONFIG_ARM_ERRATA_821420
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mrc p15, 0, r10, c15, c0, 2 @ read internal feature reg
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orr r10, r10, #1 << 1 @ set bit #1
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mcr p15, 0, r10, c15, c0, 2 @ write internal feature reg
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#endif
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|
#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:
|
|
do_invalidate_l1
|
|
|
|
__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
|
|
ENDPROC(__v7_setup)
|
|
|
|
__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", "a"
|
|
|
|
/*
|
|
* 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
|