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Diffstat (limited to 'arch/arm/mm/proc-v7.S')
| -rw-r--r-- | arch/arm/mm/proc-v7.S | 819 |
1 files changed, 819 insertions, 0 deletions
diff --git a/arch/arm/mm/proc-v7.S b/arch/arm/mm/proc-v7.S new file mode 100644 index 000000000..339eb17c9 --- /dev/null +++ b/arch/arm/mm/proc-v7.S @@ -0,0 +1,819 @@ +/* + * linux/arch/arm/mm/proc-v7.S + * + * Copyright (C) 2001 Deep Blue Solutions Ltd. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * 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 + 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 + 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 |