| /* SPDX-License-Identifier: GPL-2.0-only */ |
| /* |
| * linux/arch/arm/mm/proc-v7.S |
| * |
| * Copyright (C) 2001 Deep Blue Solutions Ltd. |
| * |
| * This is the "shell" of the ARMv7 processor support. |
| */ |
| #include <linux/arm-smccc.h> |
| #include <linux/init.h> |
| #include <linux/linkage.h> |
| #include <asm/assembler.h> |
| #include <asm/asm-offsets.h> |
| #include <asm/hwcap.h> |
| #include <asm/pgtable-hwdef.h> |
| #include <asm/pgtable.h> |
| #include <asm/memory.h> |
| |
| #include "proc-macros.S" |
| |
| #ifdef CONFIG_ARM_LPAE |
| #include "proc-v7-3level.S" |
| #else |
| #include "proc-v7-2level.S" |
| #endif |
| |
| ENTRY(cpu_v7_proc_init) |
| ret lr |
| ENDPROC(cpu_v7_proc_init) |
| |
| ENTRY(cpu_v7_proc_fin) |
| mrc p15, 0, r0, c1, c0, 0 @ ctrl register |
| bic r0, r0, #0x1000 @ ...i............ |
| bic r0, r0, #0x0006 @ .............ca. |
| mcr p15, 0, r0, c1, c0, 0 @ disable caches |
| ret lr |
| ENDPROC(cpu_v7_proc_fin) |
| |
| /* |
| * cpu_v7_reset(loc, hyp) |
| * |
| * Perform a soft reset of the system. Put the CPU into the |
| * same state as it would be if it had been reset, and branch |
| * to what would be the reset vector. |
| * |
| * - loc - location to jump to for soft reset |
| * - hyp - indicate if restart occurs in HYP mode |
| * |
| * This code must be executed using a flat identity mapping with |
| * caches disabled. |
| */ |
| .align 5 |
| .pushsection .idmap.text, "ax" |
| ENTRY(cpu_v7_reset) |
| mrc p15, 0, r2, c1, c0, 0 @ ctrl register |
| bic r2, r2, #0x1 @ ...............m |
| THUMB( bic r2, r2, #1 << 30 ) @ SCTLR.TE (Thumb exceptions) |
| mcr p15, 0, r2, c1, c0, 0 @ disable MMU |
| isb |
| #ifdef CONFIG_ARM_VIRT_EXT |
| teq r1, #0 |
| bne __hyp_soft_restart |
| #endif |
| bx r0 |
| ENDPROC(cpu_v7_reset) |
| .popsection |
| |
| /* |
| * cpu_v7_do_idle() |
| * |
| * Idle the processor (eg, wait for interrupt). |
| * |
| * IRQs are already disabled. |
| */ |
| ENTRY(cpu_v7_do_idle) |
| dsb @ WFI may enter a low-power mode |
| wfi |
| ret lr |
| ENDPROC(cpu_v7_do_idle) |
| |
| ENTRY(cpu_v7_dcache_clean_area) |
| ALT_SMP(W(nop)) @ MP extensions imply L1 PTW |
| ALT_UP_B(1f) |
| ret lr |
| 1: dcache_line_size r2, r3 |
| 2: mcr p15, 0, r0, c7, c10, 1 @ clean D entry |
| add r0, r0, r2 |
| subs r1, r1, r2 |
| bhi 2b |
| dsb ishst |
| ret lr |
| ENDPROC(cpu_v7_dcache_clean_area) |
| |
| #ifdef CONFIG_ARM_PSCI |
| .arch_extension sec |
| ENTRY(cpu_v7_smc_switch_mm) |
| stmfd sp!, {r0 - r3} |
| movw r0, #:lower16:ARM_SMCCC_ARCH_WORKAROUND_1 |
| movt r0, #:upper16:ARM_SMCCC_ARCH_WORKAROUND_1 |
| smc #0 |
| ldmfd sp!, {r0 - r3} |
| b cpu_v7_switch_mm |
| ENDPROC(cpu_v7_smc_switch_mm) |
| .arch_extension virt |
| ENTRY(cpu_v7_hvc_switch_mm) |
| stmfd sp!, {r0 - r3} |
| movw r0, #:lower16:ARM_SMCCC_ARCH_WORKAROUND_1 |
| movt r0, #:upper16:ARM_SMCCC_ARCH_WORKAROUND_1 |
| hvc #0 |
| ldmfd sp!, {r0 - r3} |
| b cpu_v7_switch_mm |
| ENDPROC(cpu_v7_hvc_switch_mm) |
| #endif |
| ENTRY(cpu_v7_iciallu_switch_mm) |
| mov r3, #0 |
| mcr p15, 0, r3, c7, c5, 0 @ ICIALLU |
| b cpu_v7_switch_mm |
| ENDPROC(cpu_v7_iciallu_switch_mm) |
| ENTRY(cpu_v7_bpiall_switch_mm) |
| mov r3, #0 |
| mcr p15, 0, r3, c7, c5, 6 @ flush BTAC/BTB |
| b cpu_v7_switch_mm |
| ENDPROC(cpu_v7_bpiall_switch_mm) |
| |
| string cpu_v7_name, "ARMv7 Processor" |
| .align |
| |
| /* Suspend/resume support: derived from arch/arm/mach-s5pv210/sleep.S */ |
| .globl cpu_v7_suspend_size |
| .equ cpu_v7_suspend_size, 4 * 9 |
| #ifdef CONFIG_ARM_CPU_SUSPEND |
| ENTRY(cpu_v7_do_suspend) |
| stmfd sp!, {r4 - r11, lr} |
| mrc p15, 0, r4, c13, c0, 0 @ FCSE/PID |
| mrc p15, 0, r5, c13, c0, 3 @ User r/o thread ID |
| stmia r0!, {r4 - r5} |
| #ifdef CONFIG_MMU |
| mrc p15, 0, r6, c3, c0, 0 @ Domain ID |
| #ifdef CONFIG_ARM_LPAE |
| mrrc p15, 1, r5, r7, c2 @ TTB 1 |
| #else |
| mrc p15, 0, r7, c2, c0, 1 @ TTB 1 |
| #endif |
| mrc p15, 0, r11, c2, c0, 2 @ TTB control register |
| #endif |
| mrc p15, 0, r8, c1, c0, 0 @ Control register |
| mrc p15, 0, r9, c1, c0, 1 @ Auxiliary control register |
| mrc p15, 0, r10, c1, c0, 2 @ Co-processor access control |
| stmia r0, {r5 - r11} |
| ldmfd sp!, {r4 - r11, pc} |
| ENDPROC(cpu_v7_do_suspend) |
| |
| ENTRY(cpu_v7_do_resume) |
| mov ip, #0 |
| mcr p15, 0, ip, c7, c5, 0 @ invalidate I cache |
| mcr p15, 0, ip, c13, c0, 1 @ set reserved context ID |
| ldmia r0!, {r4 - r5} |
| mcr p15, 0, r4, c13, c0, 0 @ FCSE/PID |
| mcr p15, 0, r5, c13, c0, 3 @ User r/o thread ID |
| ldmia r0, {r5 - r11} |
| #ifdef CONFIG_MMU |
| mcr p15, 0, ip, c8, c7, 0 @ invalidate TLBs |
| mcr p15, 0, r6, c3, c0, 0 @ Domain ID |
| #ifdef CONFIG_ARM_LPAE |
| mcrr p15, 0, r1, ip, c2 @ TTB 0 |
| mcrr p15, 1, r5, r7, c2 @ TTB 1 |
| #else |
| ALT_SMP(orr r1, r1, #TTB_FLAGS_SMP) |
| ALT_UP(orr r1, r1, #TTB_FLAGS_UP) |
| mcr p15, 0, r1, c2, c0, 0 @ TTB 0 |
| mcr p15, 0, r7, c2, c0, 1 @ TTB 1 |
| #endif |
| mcr p15, 0, r11, c2, c0, 2 @ TTB control register |
| ldr r4, =PRRR @ PRRR |
| ldr r5, =NMRR @ NMRR |
| mcr p15, 0, r4, c10, c2, 0 @ write PRRR |
| mcr p15, 0, r5, c10, c2, 1 @ write NMRR |
| #endif /* CONFIG_MMU */ |
| mrc p15, 0, r4, c1, c0, 1 @ Read Auxiliary control register |
| teq r4, r9 @ Is it already set? |
| mcrne p15, 0, r9, c1, c0, 1 @ No, so write it |
| mcr p15, 0, r10, c1, c0, 2 @ Co-processor access control |
| isb |
| dsb |
| mov r0, r8 @ control register |
| b cpu_resume_mmu |
| ENDPROC(cpu_v7_do_resume) |
| #endif |
| |
| .globl cpu_ca9mp_suspend_size |
| .equ cpu_ca9mp_suspend_size, cpu_v7_suspend_size + 4 * 2 |
| #ifdef CONFIG_ARM_CPU_SUSPEND |
| ENTRY(cpu_ca9mp_do_suspend) |
| stmfd sp!, {r4 - r5} |
| mrc p15, 0, r4, c15, c0, 1 @ Diagnostic register |
| mrc p15, 0, r5, c15, c0, 0 @ Power register |
| stmia r0!, {r4 - r5} |
| ldmfd sp!, {r4 - r5} |
| b cpu_v7_do_suspend |
| ENDPROC(cpu_ca9mp_do_suspend) |
| |
| ENTRY(cpu_ca9mp_do_resume) |
| ldmia r0!, {r4 - r5} |
| mrc p15, 0, r10, c15, c0, 1 @ Read Diagnostic register |
| teq r4, r10 @ Already restored? |
| mcrne p15, 0, r4, c15, c0, 1 @ No, so restore it |
| mrc p15, 0, r10, c15, c0, 0 @ Read Power register |
| teq r5, r10 @ Already restored? |
| mcrne p15, 0, r5, c15, c0, 0 @ No, so restore it |
| b cpu_v7_do_resume |
| ENDPROC(cpu_ca9mp_do_resume) |
| #endif |
| |
| #ifdef CONFIG_CPU_PJ4B |
| globl_equ cpu_pj4b_switch_mm, cpu_v7_switch_mm |
| globl_equ cpu_pj4b_set_pte_ext, cpu_v7_set_pte_ext |
| globl_equ cpu_pj4b_proc_init, cpu_v7_proc_init |
| globl_equ cpu_pj4b_proc_fin, cpu_v7_proc_fin |
| globl_equ cpu_pj4b_reset, cpu_v7_reset |
| #ifdef CONFIG_PJ4B_ERRATA_4742 |
| ENTRY(cpu_pj4b_do_idle) |
| dsb @ WFI may enter a low-power mode |
| wfi |
| dsb @barrier |
| ret lr |
| ENDPROC(cpu_pj4b_do_idle) |
| #else |
| globl_equ cpu_pj4b_do_idle, cpu_v7_do_idle |
| #endif |
| globl_equ cpu_pj4b_dcache_clean_area, cpu_v7_dcache_clean_area |
| #ifdef CONFIG_ARM_CPU_SUSPEND |
| ENTRY(cpu_pj4b_do_suspend) |
| stmfd sp!, {r6 - r10} |
| mrc p15, 1, r6, c15, c1, 0 @ save CP15 - extra features |
| mrc p15, 1, r7, c15, c2, 0 @ save CP15 - Aux Func Modes Ctrl 0 |
| mrc p15, 1, r8, c15, c1, 2 @ save CP15 - Aux Debug Modes Ctrl 2 |
| mrc p15, 1, r9, c15, c1, 1 @ save CP15 - Aux Debug Modes Ctrl 1 |
| mrc p15, 0, r10, c9, c14, 0 @ save CP15 - PMC |
| stmia r0!, {r6 - r10} |
| ldmfd sp!, {r6 - r10} |
| b cpu_v7_do_suspend |
| ENDPROC(cpu_pj4b_do_suspend) |
| |
| ENTRY(cpu_pj4b_do_resume) |
| ldmia r0!, {r6 - r10} |
| mcr p15, 1, r6, c15, c1, 0 @ restore CP15 - extra features |
| mcr p15, 1, r7, c15, c2, 0 @ restore CP15 - Aux Func Modes Ctrl 0 |
| mcr p15, 1, r8, c15, c1, 2 @ restore CP15 - Aux Debug Modes Ctrl 2 |
| mcr p15, 1, r9, c15, c1, 1 @ restore CP15 - Aux Debug Modes Ctrl 1 |
| mcr p15, 0, r10, c9, c14, 0 @ restore CP15 - PMC |
| b cpu_v7_do_resume |
| ENDPROC(cpu_pj4b_do_resume) |
| #endif |
| .globl cpu_pj4b_suspend_size |
| .equ cpu_pj4b_suspend_size, cpu_v7_suspend_size + 4 * 5 |
| |
| #endif |
| |
| /* |
| * __v7_setup |
| * |
| * Initialise TLB, Caches, and MMU state ready to switch the MMU |
| * on. Return in r0 the new CP15 C1 control register setting. |
| * |
| * r1, r2, r4, r5, r9, r13 must be preserved - r13 is not a stack |
| * r4: TTBR0 (low word) |
| * r5: TTBR0 (high word if LPAE) |
| * r8: TTBR1 |
| * r9: Main ID register |
| * |
| * This should be able to cover all ARMv7 cores. |
| * |
| * It is assumed that: |
| * - cache type register is implemented |
| */ |
| __v7_ca5mp_setup: |
| __v7_ca9mp_setup: |
| __v7_cr7mp_setup: |
| __v7_cr8mp_setup: |
| mov r10, #(1 << 0) @ Cache/TLB ops broadcasting |
| b 1f |
| __v7_ca7mp_setup: |
| __v7_ca12mp_setup: |
| __v7_ca15mp_setup: |
| __v7_b15mp_setup: |
| __v7_ca17mp_setup: |
| mov r10, #0 |
| 1: 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} |
| #ifdef CONFIG_SMP |
| orr r10, r10, #(1 << 6) @ Enable SMP/nAMP mode |
| ALT_SMP(mrc p15, 0, r0, c1, c0, 1) |
| ALT_UP(mov r0, r10) @ fake it for UP |
| orr r10, r10, r0 @ Set required bits |
| teq r10, r0 @ Were they already set? |
| mcrne p15, 0, r10, c1, c0, 1 @ No, update register |
| #endif |
| b __v7_setup_cont |
| |
| /* |
| * Errata: |
| * r0, r10 available for use |
| * r1, r2, r4, r5, r9, r13: must be preserved |
| * r3: contains MIDR rX number in bits 23-20 |
| * r6: contains MIDR rXpY as 8-bit XY number |
| * r9: MIDR |
| */ |
| __ca8_errata: |
| #if defined(CONFIG_ARM_ERRATA_430973) && !defined(CONFIG_ARCH_MULTIPLATFORM) |
| teq r3, #0x00100000 @ only present in r1p* |
| mrceq p15, 0, r0, c1, c0, 1 @ read aux control register |
| orreq r0, r0, #(1 << 6) @ set IBE to 1 |
| mcreq p15, 0, r0, c1, c0, 1 @ write aux control register |
| #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 |
