| /* SPDX-License-Identifier: GPL-2.0-or-later */ |
| /* |
| * Copyright (C) 1999 Hewlett-Packard (Frank Rowand) |
| * Copyright (C) 1999 Philipp Rumpf <prumpf@tux.org> |
| * Copyright (C) 1999 SuSE GmbH |
| * Copyright (C) 2021 Helge Deller <deller@gmx.de> |
| */ |
| |
| #ifndef _PARISC_ASSEMBLY_H |
| #define _PARISC_ASSEMBLY_H |
| |
| #ifdef CONFIG_64BIT |
| #define RP_OFFSET 16 |
| #define FRAME_SIZE 128 |
| #define CALLEE_REG_FRAME_SIZE 144 |
| #define REG_SZ 8 |
| #define ASM_ULONG_INSN .dword |
| #else /* CONFIG_64BIT */ |
| #define RP_OFFSET 20 |
| #define FRAME_SIZE 64 |
| #define CALLEE_REG_FRAME_SIZE 128 |
| #define REG_SZ 4 |
| #define ASM_ULONG_INSN .word |
| #endif |
| |
| /* Frame alignment for 32- and 64-bit */ |
| #define FRAME_ALIGN 64 |
| |
| #define CALLEE_FLOAT_FRAME_SIZE 80 |
| #define CALLEE_SAVE_FRAME_SIZE (CALLEE_REG_FRAME_SIZE + CALLEE_FLOAT_FRAME_SIZE) |
| |
| #ifdef CONFIG_PA20 |
| #define LDCW ldcw,co |
| #define BL b,l |
| # ifdef CONFIG_64BIT |
| # define PA_ASM_LEVEL 2.0w |
| # else |
| # define PA_ASM_LEVEL 2.0 |
| # endif |
| #else |
| #define LDCW ldcw |
| #define BL bl |
| #define PA_ASM_LEVEL 1.1 |
| #endif |
| |
| /* Privilege level field in the rightmost two bits of the IA queues */ |
| #define PRIV_USER 3 |
| #define PRIV_KERNEL 0 |
| |
| /* Space register used inside kernel */ |
| #define SR_KERNEL 0 |
| #define SR_TEMP1 1 |
| #define SR_TEMP2 2 |
| #define SR_USER 3 |
| |
| #ifdef __ASSEMBLY__ |
| |
| #ifdef CONFIG_64BIT |
| #define LDREG ldd |
| #define STREG std |
| #define LDREGX ldd,s |
| #define LDREGM ldd,mb |
| #define STREGM std,ma |
| #define SHRREG shrd |
| #define SHLREG shld |
| #define ANDCM andcm,* |
| #define COND(x) * ## x |
| #else /* CONFIG_64BIT */ |
| #define LDREG ldw |
| #define STREG stw |
| #define LDREGX ldwx,s |
| #define LDREGM ldwm |
| #define STREGM stwm |
| #define SHRREG shr |
| #define SHLREG shlw |
| #define ANDCM andcm |
| #define COND(x) x |
| #endif |
| |
| #ifdef CONFIG_64BIT |
| /* the 64-bit pa gnu assembler unfortunately defaults to .level 1.1 or 2.0 so |
| * work around that for now... */ |
| .level 2.0w |
| #endif |
| |
| #include <asm/asm-offsets.h> |
| #include <asm/page.h> |
| #include <asm/types.h> |
| |
| #include <asm/asmregs.h> |
| #include <asm/psw.h> |
| |
| /* |
| * We provide two versions of each macro to convert from physical |
| * to virtual and vice versa. The "_r1" versions take one argument |
| * register, but trashes r1 to do the conversion. The other |
| * version takes two arguments: a src and destination register. |
| * However, the source and destination registers can not be |
| * the same register. |
| */ |
| |
| .macro tophys grvirt, grphys |
| ldil L%(__PAGE_OFFSET), \grphys |
| sub \grvirt, \grphys, \grphys |
| .endm |
| |
| .macro tovirt grphys, grvirt |
| ldil L%(__PAGE_OFFSET), \grvirt |
| add \grphys, \grvirt, \grvirt |
| .endm |
| |
| .macro tophys_r1 gr |
| ldil L%(__PAGE_OFFSET), %r1 |
| sub \gr, %r1, \gr |
| .endm |
| |
| .macro tovirt_r1 gr |
| ldil L%(__PAGE_OFFSET), %r1 |
| add \gr, %r1, \gr |
| .endm |
| |
| .macro delay value |
| ldil L%\value, 1 |
| ldo R%\value(1), 1 |
| addib,UV,n -1,1,. |
| addib,NUV,n -1,1,.+8 |
| nop |
| .endm |
| |
| .macro debug value |
| .endm |
| |
| .macro shlw r, sa, t |
| zdep \r, 31-(\sa), 32-(\sa), \t |
| .endm |
| |
| /* And the PA 2.0W shift left */ |
| .macro shld r, sa, t |
| depd,z \r, 63-(\sa), 64-(\sa), \t |
| .endm |
| |
| /* Shift Right for 32-bit. Clobbers upper 32-bit on PA2.0. */ |
| .macro shr r, sa, t |
| extru \r, 31-(\sa), 32-(\sa), \t |
| .endm |
| |
| /* pa20w version of shift right */ |
| .macro shrd r, sa, t |
| extrd,u \r, 63-(\sa), 64-(\sa), \t |
| .endm |
| |
| /* Extract unsigned for 32- and 64-bit |
| * The extru instruction leaves the most significant 32 bits of the |
| * target register in an undefined state on PA 2.0 systems. */ |
| .macro extru_safe r, p, len, t |
| #ifdef CONFIG_64BIT |
| extrd,u \r, 32+(\p), \len, \t |
| #else |
| extru \r, \p, \len, \t |
| #endif |
| .endm |
| |
| /* The depi instruction leaves the most significant 32 bits of the |
| * target register in an undefined state on PA 2.0 systems. */ |
| .macro depi_safe i, p, len, t |
| #ifdef CONFIG_64BIT |
| depdi \i, 32+(\p), \len, \t |
| #else |
| depi \i, \p, \len, \t |
| #endif |
| .endm |
| |
| /* The depw instruction leaves the most significant 32 bits of the |
| * target register in an undefined state on PA 2.0 systems. */ |
| .macro dep_safe i, p, len, t |
| #ifdef CONFIG_64BIT |
| depd \i, 32+(\p), \len, \t |
| #else |
| depw \i, \p, \len, \t |
| #endif |
| .endm |
| |
| /* load 32-bit 'value' into 'reg' compensating for the ldil |
| * sign-extension when running in wide mode. |
| * WARNING!! neither 'value' nor 'reg' can be expressions |
| * containing '.'!!!! */ |
| .macro load32 value, reg |
| ldil L%\value, \reg |
| ldo R%\value(\reg), \reg |
| .endm |
| |
| .macro loadgp |
| #ifdef CONFIG_64BIT |
| ldil L%__gp, %r27 |
| ldo R%__gp(%r27), %r27 |
| #else |
| ldil L%$global$, %r27 |
| ldo R%$global$(%r27), %r27 |
| #endif |
| .endm |
| |
| #define SAVE_SP(r, where) mfsp r, %r1 ! STREG %r1, where |
| #define REST_SP(r, where) LDREG where, %r1 ! mtsp %r1, r |
| #define SAVE_CR(r, where) mfctl r, %r1 ! STREG %r1, where |
| #define REST_CR(r, where) LDREG where, %r1 ! mtctl %r1, r |
| |
| .macro save_general regs |
| STREG %r1, PT_GR1 (\regs) |
| STREG %r2, PT_GR2 (\regs) |
| STREG %r3, PT_GR3 (\regs) |
| STREG %r4, PT_GR4 (\regs) |
| STREG %r5, PT_GR5 (\regs) |
| STREG %r6, PT_GR6 (\regs) |
| STREG %r7, PT_GR7 (\regs) |
| STREG %r8, PT_GR8 (\regs) |
| STREG %r9, PT_GR9 (\regs) |
| STREG %r10, PT_GR10(\regs) |
| STREG %r11, PT_GR11(\regs) |
| STREG %r12, PT_GR12(\regs) |
| STREG %r13, PT_GR13(\regs) |
| STREG %r14, PT_GR14(\regs) |
| STREG %r15, PT_GR15(\regs) |
| STREG %r16, PT_GR16(\regs) |
| STREG %r17, PT_GR17(\regs) |
| STREG %r18, PT_GR18(\regs) |
| STREG %r19, PT_GR19(\regs) |
| STREG %r20, PT_GR20(\regs) |
| STREG %r21, PT_GR21(\regs) |
| STREG %r22, PT_GR22(\regs) |
| STREG %r23, PT_GR23(\regs) |
| STREG %r24, PT_GR24(\regs) |
| STREG %r25, PT_GR25(\regs) |
| /* r26 is saved in get_stack and used to preserve a value across virt_map */ |
| STREG %r27, PT_GR27(\regs) |
| STREG %r28, PT_GR28(\regs) |
| /* r29 is saved in get_stack and used to point to saved registers */ |
| /* r30 stack pointer saved in get_stack */ |
| STREG %r31, PT_GR31(\regs) |
| .endm |
| |
| .macro rest_general regs |
| /* r1 used as a temp in rest_stack and is restored there */ |
| LDREG PT_GR2 (\regs), %r2 |
| LDREG PT_GR3 (\regs), %r3 |
| LDREG PT_GR4 (\regs), %r4 |
| LDREG PT_GR5 (\regs), %r5 |
| LDREG PT_GR6 (\regs), %r6 |
| LDREG PT_GR7 (\regs), %r7 |
| LDREG PT_GR8 (\regs), %r8 |
| LDREG PT_GR9 (\regs), %r9 |
| LDREG PT_GR10(\regs), %r10 |
| LDREG PT_GR11(\regs), %r11 |
| LDREG PT_GR12(\regs), %r12 |
| LDREG PT_GR13(\regs), %r13 |
| LDREG PT_GR14(\regs), %r14 |
| LDREG PT_GR15(\regs), %r15 |
| LDREG PT_GR16(\regs), %r16 |
| LDREG PT_GR17(\regs), %r17 |
| LDREG PT_GR18(\regs), %r18 |
| LDREG PT_GR19(\regs), %r19 |
| LDREG PT_GR20(\regs), %r20 |
| LDREG PT_GR21(\regs), %r21 |
| LDREG PT_GR22(\regs), %r22 |
| LDREG PT_GR23(\regs), %r23 |
| LDREG PT_GR24(\regs), %r24 |
| LDREG PT_GR25(\regs), %r25 |
| LDREG PT_GR26(\regs), %r26 |
| LDREG PT_GR27(\regs), %r27 |
| LDREG PT_GR28(\regs), %r28 |
| /* r29 points to register save area, and is restored in rest_stack */ |
| /* r30 stack pointer restored in rest_stack */ |
| LDREG PT_GR31(\regs), %r31 |
| .endm |
| |
| .macro save_fp regs |
| fstd,ma %fr0, 8(\regs) |
| fstd,ma %fr1, 8(\regs) |
| fstd,ma %fr2, 8(\regs) |
| fstd,ma %fr3, 8(\regs) |
| fstd,ma %fr4, 8(\regs) |
| fstd,ma %fr5, 8(\regs) |
| fstd,ma %fr6, 8(\regs) |
| fstd,ma %fr7, 8(\regs) |
| fstd,ma %fr8, 8(\regs) |
| fstd,ma %fr9, 8(\regs) |
| fstd,ma %fr10, 8(\regs) |
| fstd,ma %fr11, 8(\regs) |
| fstd,ma %fr12, 8(\regs) |
| fstd,ma %fr13, 8(\regs) |
| fstd,ma %fr14, 8(\regs) |
| fstd,ma %fr15, 8(\regs) |
| fstd,ma %fr16, 8(\regs) |
| fstd,ma %fr17, 8(\regs) |
| fstd,ma %fr18, 8(\regs) |
| fstd,ma %fr19, 8(\regs) |
| fstd,ma %fr20, 8(\regs) |
| fstd,ma %fr21, 8(\regs) |
| fstd,ma %fr22, 8(\regs) |
| fstd,ma %fr23, 8(\regs) |
| fstd,ma %fr24, 8(\regs) |
| fstd,ma %fr25, 8(\regs) |
| fstd,ma %fr26, 8(\regs) |
| fstd,ma %fr27, 8(\regs) |
| fstd,ma %fr28, 8(\regs) |
| fstd,ma %fr29, 8(\regs) |
| fstd,ma %fr30, 8(\regs) |
| fstd %fr31, 0(\regs) |
| .endm |
| |
| .macro rest_fp regs |
| fldd 0(\regs), %fr31 |
| fldd,mb -8(\regs), %fr30 |
| fldd,mb -8(\regs), %fr29 |
| fldd,mb -8(\regs), %fr28 |
| fldd,mb -8(\regs), %fr27 |
| fldd,mb -8(\regs), %fr26 |
| fldd,mb -8(\regs), %fr25 |
| fldd,mb -8(\regs), %fr24 |
| fldd,mb -8(\regs), %fr23 |
| fldd,mb -8(\regs), %fr22 |
| fldd,mb -8(\regs), %fr21 |
| fldd,mb -8(\regs), %fr20 |
| fldd,mb -8(\regs), %fr19 |
| fldd,mb -8(\regs), %fr18 |
| fldd,mb -8(\regs), %fr17 |
| fldd,mb -8(\regs), %fr16 |
| fldd,mb -8(\regs), %fr15 |
| fldd,mb -8(\regs), %fr14 |
| fldd,mb -8(\regs), %fr13 |
| fldd,mb -8(\regs), %fr12 |
| fldd,mb -8(\regs), %fr11 |
| fldd,mb -8(\regs), %fr10 |
| fldd,mb -8(\regs), %fr9 |
| fldd,mb -8(\regs), %fr8 |
| fldd,mb -8(\regs), %fr7 |
| fldd,mb -8(\regs), %fr6 |
| fldd,mb -8(\regs), %fr5 |
| fldd,mb -8(\regs), %fr4 |
| fldd,mb -8(\regs), %fr3 |
| fldd,mb -8(\regs), %fr2 |
| fldd,mb -8(\regs), %fr1 |
| fldd,mb -8(\regs), %fr0 |
| .endm |
| |
| .macro callee_save_float |
| fstd,ma %fr12, 8(%r30) |
| fstd,ma %fr13, 8(%r30) |
| fstd,ma %fr14, 8(%r30) |
| fstd,ma %fr15, 8(%r30) |
| fstd,ma %fr16, 8(%r30) |
| fstd,ma %fr17, 8(%r30) |
| fstd,ma %fr18, 8(%r30) |
| fstd,ma %fr19, 8(%r30) |
| fstd,ma %fr20, 8(%r30) |
| fstd,ma %fr21, 8(%r30) |
| .endm |
| |
| .macro callee_rest_float |
| fldd,mb -8(%r30), %fr21 |
| fldd,mb -8(%r30), %fr20 |
| fldd,mb -8(%r30), %fr19 |
| fldd,mb -8(%r30), %fr18 |
| fldd,mb -8(%r30), %fr17 |
| fldd,mb -8(%r30), %fr16 |
| fldd,mb -8(%r30), %fr15 |
| fldd,mb -8(%r30), %fr14 |
| fldd,mb -8(%r30), %fr13 |
| fldd,mb -8(%r30), %fr12 |
| .endm |
| |
| #ifdef CONFIG_64BIT |
| .macro callee_save |
| std,ma %r3, CALLEE_REG_FRAME_SIZE(%r30) |
| mfctl %cr27, %r3 |
| std %r4, -136(%r30) |
| std %r5, -128(%r30) |
| std %r6, -120(%r30) |
| std %r7, -112(%r30) |
| std %r8, -104(%r30) |
| std %r9, -96(%r30) |
| std %r10, -88(%r30) |
| std %r11, -80(%r30) |
| std %r12, -72(%r30) |
| std %r13, -64(%r30) |
| std %r14, -56(%r30) |
| std %r15, -48(%r30) |
| std %r16, -40(%r30) |
| std %r17, -32(%r30) |
| std %r18, -24(%r30) |
| std %r3, -16(%r30) |
| .endm |
| |
| .macro callee_rest |
| ldd -16(%r30), %r3 |
| ldd -24(%r30), %r18 |
| ldd -32(%r30), %r17 |
| ldd -40(%r30), %r16 |
| ldd -48(%r30), %r15 |
| ldd -56(%r30), %r14 |
| ldd -64(%r30), %r13 |
| ldd -72(%r30), %r12 |
| ldd -80(%r30), %r11 |
| ldd -88(%r30), %r10 |
| ldd -96(%r30), %r9 |
| ldd -104(%r30), %r8 |
| ldd -112(%r30), %r7 |
| ldd -120(%r30), %r6 |
| ldd -128(%r30), %r5 |
| ldd -136(%r30), %r4 |
| mtctl %r3, %cr27 |
| ldd,mb -CALLEE_REG_FRAME_SIZE(%r30), %r3 |
| .endm |
| |
| #else /* ! CONFIG_64BIT */ |
| |
| .macro callee_save |
| stw,ma %r3, CALLEE_REG_FRAME_SIZE(%r30) |
| mfctl %cr27, %r3 |
| stw %r4, -124(%r30) |
| stw %r5, -120(%r30) |
| stw %r6, -116(%r30) |
| stw %r7, -112(%r30) |
| stw %r8, -108(%r30) |
| stw %r9, -104(%r30) |
| stw %r10, -100(%r30) |
| stw %r11, -96(%r30) |
| stw %r12, -92(%r30) |
| stw %r13, -88(%r30) |
| stw %r14, -84(%r30) |
| stw %r15, -80(%r30) |
| stw %r16, -76(%r30) |
| stw %r17, -72(%r30) |
| stw %r18, -68(%r30) |
| stw %r3, -64(%r30) |
| .endm |
| |
| .macro callee_rest |
| ldw -64(%r30), %r3 |
| ldw -68(%r30), %r18 |
| ldw -72(%r30), %r17 |
| ldw -76(%r30), %r16 |
| ldw -80(%r30), %r15 |
| ldw -84(%r30), %r14 |
| ldw -88(%r30), %r13 |
| ldw -92(%r30), %r12 |
| ldw -96(%r30), %r11 |
| ldw -100(%r30), %r10 |
| ldw -104(%r30), %r9 |
| ldw -108(%r30), %r8 |
| ldw -112(%r30), %r7 |
| ldw -116(%r30), %r6 |
| ldw -120(%r30), %r5 |
| ldw -124(%r30), %r4 |
| mtctl %r3, %cr27 |
| ldw,mb -CALLEE_REG_FRAME_SIZE(%r30), %r3 |
| .endm |
| #endif /* ! CONFIG_64BIT */ |
| |
| .macro save_specials regs |
| |
| SAVE_SP (%sr0, PT_SR0 (\regs)) |
| SAVE_SP (%sr1, PT_SR1 (\regs)) |
| SAVE_SP (%sr2, PT_SR2 (\regs)) |
| SAVE_SP (%sr3, PT_SR3 (\regs)) |
| SAVE_SP (%sr4, PT_SR4 (\regs)) |
| SAVE_SP (%sr5, PT_SR5 (\regs)) |
| SAVE_SP (%sr6, PT_SR6 (\regs)) |
| |
| SAVE_CR (%cr17, PT_IASQ0(\regs)) |
| mtctl %r0, %cr17 |
| SAVE_CR (%cr17, PT_IASQ1(\regs)) |
| |
| SAVE_CR (%cr18, PT_IAOQ0(\regs)) |
| mtctl %r0, %cr18 |
| SAVE_CR (%cr18, PT_IAOQ1(\regs)) |
| |
| #ifdef CONFIG_64BIT |
| /* cr11 (sar) is a funny one. 5 bits on PA1.1 and 6 bit on PA2.0 |
| * For PA2.0 mtsar or mtctl always write 6 bits, but mfctl only |
| * reads 5 bits. Use mfctl,w to read all six bits. Otherwise |
| * we lose the 6th bit on a save/restore over interrupt. |
| */ |
| mfctl,w %cr11, %r1 |
| STREG %r1, PT_SAR (\regs) |
| #else |
| SAVE_CR (%cr11, PT_SAR (\regs)) |
| #endif |
| SAVE_CR (%cr19, PT_IIR (\regs)) |
| |
| /* |
| * Code immediately following this macro (in intr_save) relies |
| * on r8 containing ipsw. |
| */ |
| mfctl %cr22, %r8 |
| STREG %r8, PT_PSW(\regs) |
| .endm |
| |
| .macro rest_specials regs |
| |
| REST_SP (%sr0, PT_SR0 (\regs)) |
| REST_SP (%sr1, PT_SR1 (\regs)) |
| REST_SP (%sr2, PT_SR2 (\regs)) |
| REST_SP (%sr3, PT_SR3 (\regs)) |
| REST_SP (%sr4, PT_SR4 (\regs)) |
| REST_SP (%sr5, PT_SR5 (\regs)) |
| REST_SP (%sr6, PT_SR6 (\regs)) |
| REST_SP (%sr7, PT_SR7 (\regs)) |
| |
| REST_CR (%cr17, PT_IASQ0(\regs)) |
| REST_CR (%cr17, PT_IASQ1(\regs)) |
| |
| REST_CR (%cr18, PT_IAOQ0(\regs)) |
| REST_CR (%cr18, PT_IAOQ1(\regs)) |
| |
| REST_CR (%cr11, PT_SAR (\regs)) |
| |
| REST_CR (%cr22, PT_PSW (\regs)) |
| .endm |
| |
| |
| /* First step to create a "relied upon translation" |
| * See PA 2.0 Arch. page F-4 and F-5. |
| * |
| * The ssm was originally necessary due to a "PCxT bug". |
| * But someone decided it needed to be added to the architecture |
| * and this "feature" went into rev3 of PA-RISC 1.1 Arch Manual. |
| * It's been carried forward into PA 2.0 Arch as well. :^( |
| * |
| * "ssm 0,%r0" is a NOP with side effects (prefetch barrier). |
| * rsm/ssm prevents the ifetch unit from speculatively fetching |
| * instructions past this line in the code stream. |
| * PA 2.0 processor will single step all insn in the same QUAD (4 insn). |
| */ |
| .macro pcxt_ssm_bug |
| rsm PSW_SM_I,%r0 |
| nop /* 1 */ |
| nop /* 2 */ |
| nop /* 3 */ |
| nop /* 4 */ |
| nop /* 5 */ |
| nop /* 6 */ |
| nop /* 7 */ |
| .endm |
| |
| /* Switch to virtual mapping, trashing only %r1 */ |
| .macro virt_map |
| /* pcxt_ssm_bug */ |
| rsm PSW_SM_I, %r0 /* barrier for "Relied upon Translation */ |
| mtsp %r0, %sr4 |
| mtsp %r0, %sr5 |
| mtsp %r0, %sr6 |
| tovirt_r1 %r29 |
| load32 KERNEL_PSW, %r1 |
| |
| rsm PSW_SM_QUIET,%r0 /* second "heavy weight" ctl op */ |
| mtctl %r0, %cr17 /* Clear IIASQ tail */ |
| mtctl %r0, %cr17 /* Clear IIASQ head */ |
| mtctl %r1, %ipsw |
| load32 4f, %r1 |
| mtctl %r1, %cr18 /* Set IIAOQ tail */ |
| ldo 4(%r1), %r1 |
| mtctl %r1, %cr18 /* Set IIAOQ head */ |
| rfir |
| nop |
| 4: |
| .endm |
| |
| |
| /* |
| * ASM_EXCEPTIONTABLE_ENTRY |
| * |
| * Creates an exception table entry. |
| * Do not convert to a assembler macro. This won't work. |
| */ |
| #define ASM_EXCEPTIONTABLE_ENTRY(fault_addr, except_addr) \ |
| .section __ex_table,"aw" ! \ |
| .word (fault_addr - .), (except_addr - .) ! \ |
| .previous |
| |
| |
| #endif /* __ASSEMBLY__ */ |
| #endif |
