1d2912cb1SThomas Gleixner /* SPDX-License-Identifier: GPL-2.0-only */ 24baa9922SRussell King /* 34baa9922SRussell King * arch/arm/include/asm/assembler.h 44baa9922SRussell King * 54baa9922SRussell King * Copyright (C) 1996-2000 Russell King 64baa9922SRussell King * 74baa9922SRussell King * This file contains arm architecture specific defines 84baa9922SRussell King * for the different processors. 94baa9922SRussell King * 104baa9922SRussell King * Do not include any C declarations in this file - it is included by 114baa9922SRussell King * assembler source. 124baa9922SRussell King */ 132bc58a6fSMagnus Damm #ifndef __ASM_ASSEMBLER_H__ 142bc58a6fSMagnus Damm #define __ASM_ASSEMBLER_H__ 152bc58a6fSMagnus Damm 164baa9922SRussell King #ifndef __ASSEMBLY__ 174baa9922SRussell King #error "Only include this from assembly code" 184baa9922SRussell King #endif 194baa9922SRussell King 204baa9922SRussell King #include <asm/ptrace.h> 2180c59dafSDave Martin #include <asm/opcodes-virt.h> 220b1f68e8SCatalin Marinas #include <asm/asm-offsets.h> 239a2b51b6SAndrey Ryabinin #include <asm/page.h> 249a2b51b6SAndrey Ryabinin #include <asm/thread_info.h> 25747ffc2fSRussell King #include <asm/uaccess-asm.h> 264baa9922SRussell King 276f6f6a70SRob Herring #define IOMEM(x) (x) 286f6f6a70SRob Herring 294baa9922SRussell King /* 304baa9922SRussell King * Endian independent macros for shifting bytes within registers. 314baa9922SRussell King */ 324baa9922SRussell King #ifndef __ARMEB__ 33d98b90eaSVictor Kamensky #define lspull lsr 34d98b90eaSVictor Kamensky #define lspush lsl 354baa9922SRussell King #define get_byte_0 lsl #0 364baa9922SRussell King #define get_byte_1 lsr #8 374baa9922SRussell King #define get_byte_2 lsr #16 384baa9922SRussell King #define get_byte_3 lsr #24 394baa9922SRussell King #define put_byte_0 lsl #0 404baa9922SRussell King #define put_byte_1 lsl #8 414baa9922SRussell King #define put_byte_2 lsl #16 424baa9922SRussell King #define put_byte_3 lsl #24 434baa9922SRussell King #else 44d98b90eaSVictor Kamensky #define lspull lsl 45d98b90eaSVictor Kamensky #define lspush lsr 464baa9922SRussell King #define get_byte_0 lsr #24 474baa9922SRussell King #define get_byte_1 lsr #16 484baa9922SRussell King #define get_byte_2 lsr #8 494baa9922SRussell King #define get_byte_3 lsl #0 504baa9922SRussell King #define put_byte_0 lsl #24 514baa9922SRussell King #define put_byte_1 lsl #16 524baa9922SRussell King #define put_byte_2 lsl #8 534baa9922SRussell King #define put_byte_3 lsl #0 544baa9922SRussell King #endif 554baa9922SRussell King 56457c2403SBen Dooks /* Select code for any configuration running in BE8 mode */ 57457c2403SBen Dooks #ifdef CONFIG_CPU_ENDIAN_BE8 58457c2403SBen Dooks #define ARM_BE8(code...) code 59457c2403SBen Dooks #else 60457c2403SBen Dooks #define ARM_BE8(code...) 61457c2403SBen Dooks #endif 62457c2403SBen Dooks 634baa9922SRussell King /* 644baa9922SRussell King * Data preload for architectures that support it 654baa9922SRussell King */ 664baa9922SRussell King #if __LINUX_ARM_ARCH__ >= 5 674baa9922SRussell King #define PLD(code...) code 684baa9922SRussell King #else 694baa9922SRussell King #define PLD(code...) 704baa9922SRussell King #endif 714baa9922SRussell King 724baa9922SRussell King /* 734baa9922SRussell King * This can be used to enable code to cacheline align the destination 744baa9922SRussell King * pointer when bulk writing to memory. Experiments on StrongARM and 754baa9922SRussell King * XScale didn't show this a worthwhile thing to do when the cache is not 764baa9922SRussell King * set to write-allocate (this would need further testing on XScale when WA 774baa9922SRussell King * is used). 784baa9922SRussell King * 794baa9922SRussell King * On Feroceon there is much to gain however, regardless of cache mode. 804baa9922SRussell King */ 814baa9922SRussell King #ifdef CONFIG_CPU_FEROCEON 824baa9922SRussell King #define CALGN(code...) code 834baa9922SRussell King #else 844baa9922SRussell King #define CALGN(code...) 854baa9922SRussell King #endif 864baa9922SRussell King 87ffa47aa6SArnd Bergmann #define IMM12_MASK 0xfff 88ffa47aa6SArnd Bergmann 894baa9922SRussell King /* 904baa9922SRussell King * Enable and disable interrupts 914baa9922SRussell King */ 924baa9922SRussell King #if __LINUX_ARM_ARCH__ >= 6 930d928b0bSUwe Kleine-König .macro disable_irq_notrace 944baa9922SRussell King cpsid i 954baa9922SRussell King .endm 964baa9922SRussell King 970d928b0bSUwe Kleine-König .macro enable_irq_notrace 984baa9922SRussell King cpsie i 994baa9922SRussell King .endm 1004baa9922SRussell King #else 1010d928b0bSUwe Kleine-König .macro disable_irq_notrace 1024baa9922SRussell King msr cpsr_c, #PSR_I_BIT | SVC_MODE 1034baa9922SRussell King .endm 1044baa9922SRussell King 1050d928b0bSUwe Kleine-König .macro enable_irq_notrace 1064baa9922SRussell King msr cpsr_c, #SVC_MODE 1074baa9922SRussell King .endm 1084baa9922SRussell King #endif 1094baa9922SRussell King 1103302caddSRussell King .macro asm_trace_hardirqs_off, save=1 1110d928b0bSUwe Kleine-König #if defined(CONFIG_TRACE_IRQFLAGS) 1123302caddSRussell King .if \save 1130d928b0bSUwe Kleine-König stmdb sp!, {r0-r3, ip, lr} 1143302caddSRussell King .endif 1150d928b0bSUwe Kleine-König bl trace_hardirqs_off 1163302caddSRussell King .if \save 1170d928b0bSUwe Kleine-König ldmia sp!, {r0-r3, ip, lr} 1183302caddSRussell King .endif 1190d928b0bSUwe Kleine-König #endif 1200d928b0bSUwe Kleine-König .endm 1210d928b0bSUwe Kleine-König 1223302caddSRussell King .macro asm_trace_hardirqs_on, cond=al, save=1 1230d928b0bSUwe Kleine-König #if defined(CONFIG_TRACE_IRQFLAGS) 1240d928b0bSUwe Kleine-König /* 1250d928b0bSUwe Kleine-König * actually the registers should be pushed and pop'd conditionally, but 1260d928b0bSUwe Kleine-König * after bl the flags are certainly clobbered 1270d928b0bSUwe Kleine-König */ 1283302caddSRussell King .if \save 1290d928b0bSUwe Kleine-König stmdb sp!, {r0-r3, ip, lr} 1303302caddSRussell King .endif 1310d928b0bSUwe Kleine-König bl\cond trace_hardirqs_on 1323302caddSRussell King .if \save 1330d928b0bSUwe Kleine-König ldmia sp!, {r0-r3, ip, lr} 1343302caddSRussell King .endif 1350d928b0bSUwe Kleine-König #endif 1360d928b0bSUwe Kleine-König .endm 1370d928b0bSUwe Kleine-König 1383302caddSRussell King .macro disable_irq, save=1 1390d928b0bSUwe Kleine-König disable_irq_notrace 1403302caddSRussell King asm_trace_hardirqs_off \save 1410d928b0bSUwe Kleine-König .endm 1420d928b0bSUwe Kleine-König 1430d928b0bSUwe Kleine-König .macro enable_irq 1440d928b0bSUwe Kleine-König asm_trace_hardirqs_on 1450d928b0bSUwe Kleine-König enable_irq_notrace 1460d928b0bSUwe Kleine-König .endm 1474baa9922SRussell King /* 1484baa9922SRussell King * Save the current IRQ state and disable IRQs. Note that this macro 1494baa9922SRussell King * assumes FIQs are enabled, and that the processor is in SVC mode. 1504baa9922SRussell King */ 1514baa9922SRussell King .macro save_and_disable_irqs, oldcpsr 15255bdd694SCatalin Marinas #ifdef CONFIG_CPU_V7M 15355bdd694SCatalin Marinas mrs \oldcpsr, primask 15455bdd694SCatalin Marinas #else 1554baa9922SRussell King mrs \oldcpsr, cpsr 15655bdd694SCatalin Marinas #endif 1574baa9922SRussell King disable_irq 1584baa9922SRussell King .endm 1594baa9922SRussell King 1608e43a905SRabin Vincent .macro save_and_disable_irqs_notrace, oldcpsr 161b2bf482aSVladimir Murzin #ifdef CONFIG_CPU_V7M 162b2bf482aSVladimir Murzin mrs \oldcpsr, primask 163b2bf482aSVladimir Murzin #else 1648e43a905SRabin Vincent mrs \oldcpsr, cpsr 165b2bf482aSVladimir Murzin #endif 1668e43a905SRabin Vincent disable_irq_notrace 1678e43a905SRabin Vincent .endm 1688e43a905SRabin Vincent 1694baa9922SRussell King /* 1704baa9922SRussell King * Restore interrupt state previously stored in a register. We don't 1714baa9922SRussell King * guarantee that this will preserve the flags. 1724baa9922SRussell King */ 1730d928b0bSUwe Kleine-König .macro restore_irqs_notrace, oldcpsr 17455bdd694SCatalin Marinas #ifdef CONFIG_CPU_V7M 17555bdd694SCatalin Marinas msr primask, \oldcpsr 17655bdd694SCatalin Marinas #else 1774baa9922SRussell King msr cpsr_c, \oldcpsr 17855bdd694SCatalin Marinas #endif 1794baa9922SRussell King .endm 1804baa9922SRussell King 1810d928b0bSUwe Kleine-König .macro restore_irqs, oldcpsr 1820d928b0bSUwe Kleine-König tst \oldcpsr, #PSR_I_BIT 18301e09a28SRussell King asm_trace_hardirqs_on cond=eq 1840d928b0bSUwe Kleine-König restore_irqs_notrace \oldcpsr 1850d928b0bSUwe Kleine-König .endm 1860d928b0bSUwe Kleine-König 18739ad04ccSCatalin Marinas /* 18814327c66SRussell King * Assembly version of "adr rd, BSYM(sym)". This should only be used to 18914327c66SRussell King * reference local symbols in the same assembly file which are to be 19014327c66SRussell King * resolved by the assembler. Other usage is undefined. 19114327c66SRussell King */ 19214327c66SRussell King .irp c,,eq,ne,cs,cc,mi,pl,vs,vc,hi,ls,ge,lt,gt,le,hs,lo 19314327c66SRussell King .macro badr\c, rd, sym 19414327c66SRussell King #ifdef CONFIG_THUMB2_KERNEL 19514327c66SRussell King adr\c \rd, \sym + 1 19614327c66SRussell King #else 19714327c66SRussell King adr\c \rd, \sym 19814327c66SRussell King #endif 19914327c66SRussell King .endm 20014327c66SRussell King .endr 20114327c66SRussell King 20214327c66SRussell King /* 20339ad04ccSCatalin Marinas * Get current thread_info. 20439ad04ccSCatalin Marinas */ 20539ad04ccSCatalin Marinas .macro get_thread_info, rd 2069a2b51b6SAndrey Ryabinin ARM( mov \rd, sp, lsr #THREAD_SIZE_ORDER + PAGE_SHIFT ) 20739ad04ccSCatalin Marinas THUMB( mov \rd, sp ) 2089a2b51b6SAndrey Ryabinin THUMB( lsr \rd, \rd, #THREAD_SIZE_ORDER + PAGE_SHIFT ) 2099a2b51b6SAndrey Ryabinin mov \rd, \rd, lsl #THREAD_SIZE_ORDER + PAGE_SHIFT 21039ad04ccSCatalin Marinas .endm 21139ad04ccSCatalin Marinas 2120b1f68e8SCatalin Marinas /* 2130b1f68e8SCatalin Marinas * Increment/decrement the preempt count. 2140b1f68e8SCatalin Marinas */ 2150b1f68e8SCatalin Marinas #ifdef CONFIG_PREEMPT_COUNT 2160b1f68e8SCatalin Marinas .macro inc_preempt_count, ti, tmp 2170b1f68e8SCatalin Marinas ldr \tmp, [\ti, #TI_PREEMPT] @ get preempt count 2180b1f68e8SCatalin Marinas add \tmp, \tmp, #1 @ increment it 2190b1f68e8SCatalin Marinas str \tmp, [\ti, #TI_PREEMPT] 2200b1f68e8SCatalin Marinas .endm 2210b1f68e8SCatalin Marinas 2220b1f68e8SCatalin Marinas .macro dec_preempt_count, ti, tmp 2230b1f68e8SCatalin Marinas ldr \tmp, [\ti, #TI_PREEMPT] @ get preempt count 2240b1f68e8SCatalin Marinas sub \tmp, \tmp, #1 @ decrement it 2250b1f68e8SCatalin Marinas str \tmp, [\ti, #TI_PREEMPT] 2260b1f68e8SCatalin Marinas .endm 2270b1f68e8SCatalin Marinas 2280b1f68e8SCatalin Marinas .macro dec_preempt_count_ti, ti, tmp 2290b1f68e8SCatalin Marinas get_thread_info \ti 2300b1f68e8SCatalin Marinas dec_preempt_count \ti, \tmp 2310b1f68e8SCatalin Marinas .endm 2320b1f68e8SCatalin Marinas #else 2330b1f68e8SCatalin Marinas .macro inc_preempt_count, ti, tmp 2340b1f68e8SCatalin Marinas .endm 2350b1f68e8SCatalin Marinas 2360b1f68e8SCatalin Marinas .macro dec_preempt_count, ti, tmp 2370b1f68e8SCatalin Marinas .endm 2380b1f68e8SCatalin Marinas 2390b1f68e8SCatalin Marinas .macro dec_preempt_count_ti, ti, tmp 2400b1f68e8SCatalin Marinas .endm 2410b1f68e8SCatalin Marinas #endif 2420b1f68e8SCatalin Marinas 243f441882aSVincent Whitchurch #define USERL(l, x...) \ 2444baa9922SRussell King 9999: x; \ 2454260415fSRussell King .pushsection __ex_table,"a"; \ 2464baa9922SRussell King .align 3; \ 247f441882aSVincent Whitchurch .long 9999b,l; \ 2484260415fSRussell King .popsection 249bac4e960SRussell King 250f441882aSVincent Whitchurch #define USER(x...) USERL(9001f, x) 251f441882aSVincent Whitchurch 252f00ec48fSRussell King #ifdef CONFIG_SMP 253f00ec48fSRussell King #define ALT_SMP(instr...) \ 254f00ec48fSRussell King 9998: instr 255ed3768a8SDave Martin /* 256ed3768a8SDave Martin * Note: if you get assembler errors from ALT_UP() when building with 257ed3768a8SDave Martin * CONFIG_THUMB2_KERNEL, you almost certainly need to use 258ed3768a8SDave Martin * ALT_SMP( W(instr) ... ) 259ed3768a8SDave Martin */ 260f00ec48fSRussell King #define ALT_UP(instr...) \ 261f00ec48fSRussell King .pushsection ".alt.smp.init", "a" ;\ 262f00ec48fSRussell King .long 9998b ;\ 263ed3768a8SDave Martin 9997: instr ;\ 26489c6bc58SRussell King .if . - 9997b == 2 ;\ 26589c6bc58SRussell King nop ;\ 26689c6bc58SRussell King .endif ;\ 267ed3768a8SDave Martin .if . - 9997b != 4 ;\ 268ed3768a8SDave Martin .error "ALT_UP() content must assemble to exactly 4 bytes";\ 269ed3768a8SDave Martin .endif ;\ 270f00ec48fSRussell King .popsection 271f00ec48fSRussell King #define ALT_UP_B(label) \ 272f00ec48fSRussell King .pushsection ".alt.smp.init", "a" ;\ 273f00ec48fSRussell King .long 9998b ;\ 274a780e485SJian Cai W(b) . + (label - 9998b) ;\ 275f00ec48fSRussell King .popsection 276f00ec48fSRussell King #else 277f00ec48fSRussell King #define ALT_SMP(instr...) 278f00ec48fSRussell King #define ALT_UP(instr...) instr 279f00ec48fSRussell King #define ALT_UP_B(label) b label 280f00ec48fSRussell King #endif 281f00ec48fSRussell King 282bac4e960SRussell King /* 283d675d0bcSWill Deacon * Instruction barrier 284d675d0bcSWill Deacon */ 285d675d0bcSWill Deacon .macro instr_sync 286d675d0bcSWill Deacon #if __LINUX_ARM_ARCH__ >= 7 287d675d0bcSWill Deacon isb 288d675d0bcSWill Deacon #elif __LINUX_ARM_ARCH__ == 6 289d675d0bcSWill Deacon mcr p15, 0, r0, c7, c5, 4 290d675d0bcSWill Deacon #endif 291d675d0bcSWill Deacon .endm 292d675d0bcSWill Deacon 293d675d0bcSWill Deacon /* 294bac4e960SRussell King * SMP data memory barrier 295bac4e960SRussell King */ 296ed3768a8SDave Martin .macro smp_dmb mode 297bac4e960SRussell King #ifdef CONFIG_SMP 298bac4e960SRussell King #if __LINUX_ARM_ARCH__ >= 7 299ed3768a8SDave Martin .ifeqs "\mode","arm" 3003ea12806SWill Deacon ALT_SMP(dmb ish) 301ed3768a8SDave Martin .else 3023ea12806SWill Deacon ALT_SMP(W(dmb) ish) 303ed3768a8SDave Martin .endif 304bac4e960SRussell King #elif __LINUX_ARM_ARCH__ == 6 305f00ec48fSRussell King ALT_SMP(mcr p15, 0, r0, c7, c10, 5) @ dmb 306f00ec48fSRussell King #else 307f00ec48fSRussell King #error Incompatible SMP platform 308bac4e960SRussell King #endif 309ed3768a8SDave Martin .ifeqs "\mode","arm" 310f00ec48fSRussell King ALT_UP(nop) 311ed3768a8SDave Martin .else 312ed3768a8SDave Martin ALT_UP(W(nop)) 313ed3768a8SDave Martin .endif 314bac4e960SRussell King #endif 315bac4e960SRussell King .endm 316b86040a5SCatalin Marinas 31755bdd694SCatalin Marinas #if defined(CONFIG_CPU_V7M) 31855bdd694SCatalin Marinas /* 31955bdd694SCatalin Marinas * setmode is used to assert to be in svc mode during boot. For v7-M 32055bdd694SCatalin Marinas * this is done in __v7m_setup, so setmode can be empty here. 32155bdd694SCatalin Marinas */ 32255bdd694SCatalin Marinas .macro setmode, mode, reg 32355bdd694SCatalin Marinas .endm 32455bdd694SCatalin Marinas #elif defined(CONFIG_THUMB2_KERNEL) 325b86040a5SCatalin Marinas .macro setmode, mode, reg 326b86040a5SCatalin Marinas mov \reg, #\mode 327b86040a5SCatalin Marinas msr cpsr_c, \reg 328b86040a5SCatalin Marinas .endm 329b86040a5SCatalin Marinas #else 330b86040a5SCatalin Marinas .macro setmode, mode, reg 331b86040a5SCatalin Marinas msr cpsr_c, #\mode 332b86040a5SCatalin Marinas .endm 333b86040a5SCatalin Marinas #endif 3348b592783SCatalin Marinas 3358b592783SCatalin Marinas /* 33680c59dafSDave Martin * Helper macro to enter SVC mode cleanly and mask interrupts. reg is 33780c59dafSDave Martin * a scratch register for the macro to overwrite. 33880c59dafSDave Martin * 33980c59dafSDave Martin * This macro is intended for forcing the CPU into SVC mode at boot time. 34080c59dafSDave Martin * you cannot return to the original mode. 34180c59dafSDave Martin */ 34280c59dafSDave Martin .macro safe_svcmode_maskall reg:req 3430e0779daSLorenzo Pieralisi #if __LINUX_ARM_ARCH__ >= 6 && !defined(CONFIG_CPU_V7M) 34480c59dafSDave Martin mrs \reg , cpsr 3458e9c24a2SRussell King eor \reg, \reg, #HYP_MODE 3468e9c24a2SRussell King tst \reg, #MODE_MASK 34780c59dafSDave Martin bic \reg , \reg , #MODE_MASK 3488e9c24a2SRussell King orr \reg , \reg , #PSR_I_BIT | PSR_F_BIT | SVC_MODE 34980c59dafSDave Martin THUMB( orr \reg , \reg , #PSR_T_BIT ) 35080c59dafSDave Martin bne 1f 3512a552d5eSMarc Zyngier orr \reg, \reg, #PSR_A_BIT 35214327c66SRussell King badr lr, 2f 3532a552d5eSMarc Zyngier msr spsr_cxsf, \reg 35480c59dafSDave Martin __MSR_ELR_HYP(14) 35580c59dafSDave Martin __ERET 3562a552d5eSMarc Zyngier 1: msr cpsr_c, \reg 35780c59dafSDave Martin 2: 3581ecec696SDave Martin #else 3591ecec696SDave Martin /* 3601ecec696SDave Martin * workaround for possibly broken pre-v6 hardware 3611ecec696SDave Martin * (akita, Sharp Zaurus C-1000, PXA270-based) 3621ecec696SDave Martin */ 3631ecec696SDave Martin setmode PSR_F_BIT | PSR_I_BIT | SVC_MODE, \reg 3641ecec696SDave Martin #endif 36580c59dafSDave Martin .endm 36680c59dafSDave Martin 36780c59dafSDave Martin /* 3688b592783SCatalin Marinas * STRT/LDRT access macros with ARM and Thumb-2 variants 3698b592783SCatalin Marinas */ 3708b592783SCatalin Marinas #ifdef CONFIG_THUMB2_KERNEL 3718b592783SCatalin Marinas 3724e7682d0SCatalin Marinas .macro usraccoff, instr, reg, ptr, inc, off, cond, abort, t=TUSER() 3738b592783SCatalin Marinas 9999: 3748b592783SCatalin Marinas .if \inc == 1 375c001899aSStefan Agner \instr\()b\t\cond\().w \reg, [\ptr, #\off] 3768b592783SCatalin Marinas .elseif \inc == 4 377c001899aSStefan Agner \instr\t\cond\().w \reg, [\ptr, #\off] 3788b592783SCatalin Marinas .else 3798b592783SCatalin Marinas .error "Unsupported inc macro argument" 3808b592783SCatalin Marinas .endif 3818b592783SCatalin Marinas 3824260415fSRussell King .pushsection __ex_table,"a" 3838b592783SCatalin Marinas .align 3 3848b592783SCatalin Marinas .long 9999b, \abort 3854260415fSRussell King .popsection 3868b592783SCatalin Marinas .endm 3878b592783SCatalin Marinas 3888b592783SCatalin Marinas .macro usracc, instr, reg, ptr, inc, cond, rept, abort 3898b592783SCatalin Marinas @ explicit IT instruction needed because of the label 3908b592783SCatalin Marinas @ introduced by the USER macro 3918b592783SCatalin Marinas .ifnc \cond,al 3928b592783SCatalin Marinas .if \rept == 1 3938b592783SCatalin Marinas itt \cond 3948b592783SCatalin Marinas .elseif \rept == 2 3958b592783SCatalin Marinas ittt \cond 3968b592783SCatalin Marinas .else 3978b592783SCatalin Marinas .error "Unsupported rept macro argument" 3988b592783SCatalin Marinas .endif 3998b592783SCatalin Marinas .endif 4008b592783SCatalin Marinas 4018b592783SCatalin Marinas @ Slightly optimised to avoid incrementing the pointer twice 4028b592783SCatalin Marinas usraccoff \instr, \reg, \ptr, \inc, 0, \cond, \abort 4038b592783SCatalin Marinas .if \rept == 2 4041142b71dSWill Deacon usraccoff \instr, \reg, \ptr, \inc, \inc, \cond, \abort 4058b592783SCatalin Marinas .endif 4068b592783SCatalin Marinas 4078b592783SCatalin Marinas add\cond \ptr, #\rept * \inc 4088b592783SCatalin Marinas .endm 4098b592783SCatalin Marinas 4108b592783SCatalin Marinas #else /* !CONFIG_THUMB2_KERNEL */ 4118b592783SCatalin Marinas 4124e7682d0SCatalin Marinas .macro usracc, instr, reg, ptr, inc, cond, rept, abort, t=TUSER() 4138b592783SCatalin Marinas .rept \rept 4148b592783SCatalin Marinas 9999: 4158b592783SCatalin Marinas .if \inc == 1 416c001899aSStefan Agner \instr\()b\t\cond \reg, [\ptr], #\inc 4178b592783SCatalin Marinas .elseif \inc == 4 418c001899aSStefan Agner \instr\t\cond \reg, [\ptr], #\inc 4198b592783SCatalin Marinas .else 4208b592783SCatalin Marinas .error "Unsupported inc macro argument" 4218b592783SCatalin Marinas .endif 4228b592783SCatalin Marinas 4234260415fSRussell King .pushsection __ex_table,"a" 4248b592783SCatalin Marinas .align 3 4258b592783SCatalin Marinas .long 9999b, \abort 4264260415fSRussell King .popsection 4278b592783SCatalin Marinas .endr 4288b592783SCatalin Marinas .endm 4298b592783SCatalin Marinas 4308b592783SCatalin Marinas #endif /* CONFIG_THUMB2_KERNEL */ 4318b592783SCatalin Marinas 4328b592783SCatalin Marinas .macro strusr, reg, ptr, inc, cond=al, rept=1, abort=9001f 4338b592783SCatalin Marinas usracc str, \reg, \ptr, \inc, \cond, \rept, \abort 4348b592783SCatalin Marinas .endm 4358b592783SCatalin Marinas 4368b592783SCatalin Marinas .macro ldrusr, reg, ptr, inc, cond=al, rept=1, abort=9001f 4378b592783SCatalin Marinas usracc ldr, \reg, \ptr, \inc, \cond, \rept, \abort 4388b592783SCatalin Marinas .endm 4398f51965eSDave Martin 4408f51965eSDave Martin /* Utility macro for declaring string literals */ 4418f51965eSDave Martin .macro string name:req, string 4428f51965eSDave Martin .type \name , #object 4438f51965eSDave Martin \name: 4448f51965eSDave Martin .asciz "\string" 4458f51965eSDave Martin .size \name , . - \name 4468f51965eSDave Martin .endm 4478f51965eSDave Martin 4486ebbf2ceSRussell King .irp c,,eq,ne,cs,cc,mi,pl,vs,vc,hi,ls,ge,lt,gt,le,hs,lo 4496ebbf2ceSRussell King .macro ret\c, reg 4506ebbf2ceSRussell King #if __LINUX_ARM_ARCH__ < 6 4516ebbf2ceSRussell King mov\c pc, \reg 4526ebbf2ceSRussell King #else 4536ebbf2ceSRussell King .ifeqs "\reg", "lr" 4546ebbf2ceSRussell King bx\c \reg 4556ebbf2ceSRussell King .else 4566ebbf2ceSRussell King mov\c pc, \reg 4576ebbf2ceSRussell King .endif 4586ebbf2ceSRussell King #endif 4596ebbf2ceSRussell King .endm 4606ebbf2ceSRussell King .endr 4616ebbf2ceSRussell King 4626ebbf2ceSRussell King .macro ret.w, reg 4636ebbf2ceSRussell King ret \reg 4646ebbf2ceSRussell King #ifdef CONFIG_THUMB2_KERNEL 4656ebbf2ceSRussell King nop 4666ebbf2ceSRussell King #endif 4676ebbf2ceSRussell King .endm 4686ebbf2ceSRussell King 4698bafae20SRussell King .macro bug, msg, line 4708bafae20SRussell King #ifdef CONFIG_THUMB2_KERNEL 4718bafae20SRussell King 1: .inst 0xde02 4728bafae20SRussell King #else 4738bafae20SRussell King 1: .inst 0xe7f001f2 4748bafae20SRussell King #endif 4758bafae20SRussell King #ifdef CONFIG_DEBUG_BUGVERBOSE 4768bafae20SRussell King .pushsection .rodata.str, "aMS", %progbits, 1 4778bafae20SRussell King 2: .asciz "\msg" 4788bafae20SRussell King .popsection 4798bafae20SRussell King .pushsection __bug_table, "aw" 4808bafae20SRussell King .align 2 4818bafae20SRussell King .word 1b, 2b 4828bafae20SRussell King .hword \line 4838bafae20SRussell King .popsection 4848bafae20SRussell King #endif 4858bafae20SRussell King .endm 4868bafae20SRussell King 4870d73c3f8SMasami Hiramatsu #ifdef CONFIG_KPROBES 4880d73c3f8SMasami Hiramatsu #define _ASM_NOKPROBE(entry) \ 4890d73c3f8SMasami Hiramatsu .pushsection "_kprobe_blacklist", "aw" ; \ 4900d73c3f8SMasami Hiramatsu .balign 4 ; \ 4910d73c3f8SMasami Hiramatsu .long entry; \ 4920d73c3f8SMasami Hiramatsu .popsection 4930d73c3f8SMasami Hiramatsu #else 4940d73c3f8SMasami Hiramatsu #define _ASM_NOKPROBE(entry) 4950d73c3f8SMasami Hiramatsu #endif 4960d73c3f8SMasami Hiramatsu 497*0b167463SArd Biesheuvel .macro __adldst_l, op, reg, sym, tmp, c 498*0b167463SArd Biesheuvel .if __LINUX_ARM_ARCH__ < 7 499*0b167463SArd Biesheuvel ldr\c \tmp, .La\@ 500*0b167463SArd Biesheuvel .subsection 1 501*0b167463SArd Biesheuvel .align 2 502*0b167463SArd Biesheuvel .La\@: .long \sym - .Lpc\@ 503*0b167463SArd Biesheuvel .previous 504*0b167463SArd Biesheuvel .else 505*0b167463SArd Biesheuvel .ifnb \c 506*0b167463SArd Biesheuvel THUMB( ittt \c ) 507*0b167463SArd Biesheuvel .endif 508*0b167463SArd Biesheuvel movw\c \tmp, #:lower16:\sym - .Lpc\@ 509*0b167463SArd Biesheuvel movt\c \tmp, #:upper16:\sym - .Lpc\@ 510*0b167463SArd Biesheuvel .endif 511*0b167463SArd Biesheuvel 512*0b167463SArd Biesheuvel #ifndef CONFIG_THUMB2_KERNEL 513*0b167463SArd Biesheuvel .set .Lpc\@, . + 8 // PC bias 514*0b167463SArd Biesheuvel .ifc \op, add 515*0b167463SArd Biesheuvel add\c \reg, \tmp, pc 516*0b167463SArd Biesheuvel .else 517*0b167463SArd Biesheuvel \op\c \reg, [pc, \tmp] 518*0b167463SArd Biesheuvel .endif 519*0b167463SArd Biesheuvel #else 520*0b167463SArd Biesheuvel .Lb\@: add\c \tmp, \tmp, pc 521*0b167463SArd Biesheuvel /* 522*0b167463SArd Biesheuvel * In Thumb-2 builds, the PC bias depends on whether we are currently 523*0b167463SArd Biesheuvel * emitting into a .arm or a .thumb section. The size of the add opcode 524*0b167463SArd Biesheuvel * above will be 2 bytes when emitting in Thumb mode and 4 bytes when 525*0b167463SArd Biesheuvel * emitting in ARM mode, so let's use this to account for the bias. 526*0b167463SArd Biesheuvel */ 527*0b167463SArd Biesheuvel .set .Lpc\@, . + (. - .Lb\@) 528*0b167463SArd Biesheuvel 529*0b167463SArd Biesheuvel .ifnc \op, add 530*0b167463SArd Biesheuvel \op\c \reg, [\tmp] 531*0b167463SArd Biesheuvel .endif 532*0b167463SArd Biesheuvel #endif 533*0b167463SArd Biesheuvel .endm 534*0b167463SArd Biesheuvel 535*0b167463SArd Biesheuvel /* 536*0b167463SArd Biesheuvel * mov_l - move a constant value or [relocated] address into a register 537*0b167463SArd Biesheuvel */ 538*0b167463SArd Biesheuvel .macro mov_l, dst:req, imm:req 539*0b167463SArd Biesheuvel .if __LINUX_ARM_ARCH__ < 7 540*0b167463SArd Biesheuvel ldr \dst, =\imm 541*0b167463SArd Biesheuvel .else 542*0b167463SArd Biesheuvel movw \dst, #:lower16:\imm 543*0b167463SArd Biesheuvel movt \dst, #:upper16:\imm 544*0b167463SArd Biesheuvel .endif 545*0b167463SArd Biesheuvel .endm 546*0b167463SArd Biesheuvel 547*0b167463SArd Biesheuvel /* 548*0b167463SArd Biesheuvel * adr_l - adr pseudo-op with unlimited range 549*0b167463SArd Biesheuvel * 550*0b167463SArd Biesheuvel * @dst: destination register 551*0b167463SArd Biesheuvel * @sym: name of the symbol 552*0b167463SArd Biesheuvel * @cond: conditional opcode suffix 553*0b167463SArd Biesheuvel */ 554*0b167463SArd Biesheuvel .macro adr_l, dst:req, sym:req, cond 555*0b167463SArd Biesheuvel __adldst_l add, \dst, \sym, \dst, \cond 556*0b167463SArd Biesheuvel .endm 557*0b167463SArd Biesheuvel 558*0b167463SArd Biesheuvel /* 559*0b167463SArd Biesheuvel * ldr_l - ldr <literal> pseudo-op with unlimited range 560*0b167463SArd Biesheuvel * 561*0b167463SArd Biesheuvel * @dst: destination register 562*0b167463SArd Biesheuvel * @sym: name of the symbol 563*0b167463SArd Biesheuvel * @cond: conditional opcode suffix 564*0b167463SArd Biesheuvel */ 565*0b167463SArd Biesheuvel .macro ldr_l, dst:req, sym:req, cond 566*0b167463SArd Biesheuvel __adldst_l ldr, \dst, \sym, \dst, \cond 567*0b167463SArd Biesheuvel .endm 568*0b167463SArd Biesheuvel 569*0b167463SArd Biesheuvel /* 570*0b167463SArd Biesheuvel * str_l - str <literal> pseudo-op with unlimited range 571*0b167463SArd Biesheuvel * 572*0b167463SArd Biesheuvel * @src: source register 573*0b167463SArd Biesheuvel * @sym: name of the symbol 574*0b167463SArd Biesheuvel * @tmp: mandatory scratch register 575*0b167463SArd Biesheuvel * @cond: conditional opcode suffix 576*0b167463SArd Biesheuvel */ 577*0b167463SArd Biesheuvel .macro str_l, src:req, sym:req, tmp:req, cond 578*0b167463SArd Biesheuvel __adldst_l str, \src, \sym, \tmp, \cond 579*0b167463SArd Biesheuvel .endm 580*0b167463SArd Biesheuvel 5812bc58a6fSMagnus Damm #endif /* __ASM_ASSEMBLER_H__ */ 582