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linux/include/asm-powerpc/ppc_asm.h
Kumar Gala 748a768384 [POWERPC] Fix modpost warnings from head*.S on ppc32 
We get warnings like the following from the various ppc32 head*.S files:

WARNING: vmlinux.o(.text+0x358): Section mismatch: reference to .init.text:early_init (between 'skpinv' and 'interrupt_base')
WARNING: vmlinux.o(.text+0x380): Section mismatch: reference to .init.text:machine_init (between 'skpinv' and 'interrupt_base')
WARNING: vmlinux.o(.text+0x384): Section mismatch: reference to .init.text:MMU_init (between 'skpinv' and 'interrupt_base')
WARNING: vmlinux.o(.text+0x3aa): Section mismatch: reference to .init.text:start_kernel (between 'skpinv' and 'interrupt_base')
WARNING: vmlinux.o(.text+0x3ae): Section mismatch: reference to .init.text:start_kernel (between 'skpinv' and 'interrupt_base')

Added a .text.head section simliar to what other architectures do since
modpost already excludes this from its warnings.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2007-09-14 08:53:36 -05:00

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/*
* Copyright (C) 1995-1999 Gary Thomas, Paul Mackerras, Cort Dougan.
*/
#ifndef _ASM_POWERPC_PPC_ASM_H
#define _ASM_POWERPC_PPC_ASM_H
#include <linux/stringify.h>
#include <asm/asm-compat.h>
#ifndef __ASSEMBLY__
#error __FILE__ should only be used in assembler files
#else
#define SZL (BITS_PER_LONG/8)
/*
* Stuff for accurate CPU time accounting.
* These macros handle transitions between user and system state
* in exception entry and exit and accumulate time to the
* user_time and system_time fields in the paca.
*/
#ifndef CONFIG_VIRT_CPU_ACCOUNTING
#define ACCOUNT_CPU_USER_ENTRY(ra, rb)
#define ACCOUNT_CPU_USER_EXIT(ra, rb)
#else
#define ACCOUNT_CPU_USER_ENTRY(ra, rb) \
beq 2f; /* if from kernel mode */ \
BEGIN_FTR_SECTION; \
mfspr ra,SPRN_PURR; /* get processor util. reg */ \
END_FTR_SECTION_IFSET(CPU_FTR_PURR); \
BEGIN_FTR_SECTION; \
MFTB(ra); /* or get TB if no PURR */ \
END_FTR_SECTION_IFCLR(CPU_FTR_PURR); \
ld rb,PACA_STARTPURR(r13); \
std ra,PACA_STARTPURR(r13); \
subf rb,rb,ra; /* subtract start value */ \
ld ra,PACA_USER_TIME(r13); \
add ra,ra,rb; /* add on to user time */ \
std ra,PACA_USER_TIME(r13); \
2:
#define ACCOUNT_CPU_USER_EXIT(ra, rb) \
BEGIN_FTR_SECTION; \
mfspr ra,SPRN_PURR; /* get processor util. reg */ \
END_FTR_SECTION_IFSET(CPU_FTR_PURR); \
BEGIN_FTR_SECTION; \
MFTB(ra); /* or get TB if no PURR */ \
END_FTR_SECTION_IFCLR(CPU_FTR_PURR); \
ld rb,PACA_STARTPURR(r13); \
std ra,PACA_STARTPURR(r13); \
subf rb,rb,ra; /* subtract start value */ \
ld ra,PACA_SYSTEM_TIME(r13); \
add ra,ra,rb; /* add on to user time */ \
std ra,PACA_SYSTEM_TIME(r13);
#endif
/*
* Macros for storing registers into and loading registers from
* exception frames.
*/
#ifdef __powerpc64__
#define SAVE_GPR(n, base) std n,GPR0+8*(n)(base)
#define REST_GPR(n, base) ld n,GPR0+8*(n)(base)
#define SAVE_NVGPRS(base) SAVE_8GPRS(14, base); SAVE_10GPRS(22, base)
#define REST_NVGPRS(base) REST_8GPRS(14, base); REST_10GPRS(22, base)
#else
#define SAVE_GPR(n, base) stw n,GPR0+4*(n)(base)
#define REST_GPR(n, base) lwz n,GPR0+4*(n)(base)
#define SAVE_NVGPRS(base) SAVE_GPR(13, base); SAVE_8GPRS(14, base); \
SAVE_10GPRS(22, base)
#define REST_NVGPRS(base) REST_GPR(13, base); REST_8GPRS(14, base); \
REST_10GPRS(22, base)
#endif
#define SAVE_2GPRS(n, base) SAVE_GPR(n, base); SAVE_GPR(n+1, base)
#define SAVE_4GPRS(n, base) SAVE_2GPRS(n, base); SAVE_2GPRS(n+2, base)
#define SAVE_8GPRS(n, base) SAVE_4GPRS(n, base); SAVE_4GPRS(n+4, base)
#define SAVE_10GPRS(n, base) SAVE_8GPRS(n, base); SAVE_2GPRS(n+8, base)
#define REST_2GPRS(n, base) REST_GPR(n, base); REST_GPR(n+1, base)
#define REST_4GPRS(n, base) REST_2GPRS(n, base); REST_2GPRS(n+2, base)
#define REST_8GPRS(n, base) REST_4GPRS(n, base); REST_4GPRS(n+4, base)
#define REST_10GPRS(n, base) REST_8GPRS(n, base); REST_2GPRS(n+8, base)
#define SAVE_FPR(n, base) stfd n,THREAD_FPR0+8*(n)(base)
#define SAVE_2FPRS(n, base) SAVE_FPR(n, base); SAVE_FPR(n+1, base)
#define SAVE_4FPRS(n, base) SAVE_2FPRS(n, base); SAVE_2FPRS(n+2, base)
#define SAVE_8FPRS(n, base) SAVE_4FPRS(n, base); SAVE_4FPRS(n+4, base)
#define SAVE_16FPRS(n, base) SAVE_8FPRS(n, base); SAVE_8FPRS(n+8, base)
#define SAVE_32FPRS(n, base) SAVE_16FPRS(n, base); SAVE_16FPRS(n+16, base)
#define REST_FPR(n, base) lfd n,THREAD_FPR0+8*(n)(base)
#define REST_2FPRS(n, base) REST_FPR(n, base); REST_FPR(n+1, base)
#define REST_4FPRS(n, base) REST_2FPRS(n, base); REST_2FPRS(n+2, base)
#define REST_8FPRS(n, base) REST_4FPRS(n, base); REST_4FPRS(n+4, base)
#define REST_16FPRS(n, base) REST_8FPRS(n, base); REST_8FPRS(n+8, base)
#define REST_32FPRS(n, base) REST_16FPRS(n, base); REST_16FPRS(n+16, base)
#define SAVE_VR(n,b,base) li b,THREAD_VR0+(16*(n)); stvx n,b,base
#define SAVE_2VRS(n,b,base) SAVE_VR(n,b,base); SAVE_VR(n+1,b,base)
#define SAVE_4VRS(n,b,base) SAVE_2VRS(n,b,base); SAVE_2VRS(n+2,b,base)
#define SAVE_8VRS(n,b,base) SAVE_4VRS(n,b,base); SAVE_4VRS(n+4,b,base)
#define SAVE_16VRS(n,b,base) SAVE_8VRS(n,b,base); SAVE_8VRS(n+8,b,base)
#define SAVE_32VRS(n,b,base) SAVE_16VRS(n,b,base); SAVE_16VRS(n+16,b,base)
#define REST_VR(n,b,base) li b,THREAD_VR0+(16*(n)); lvx n,b,base
#define REST_2VRS(n,b,base) REST_VR(n,b,base); REST_VR(n+1,b,base)
#define REST_4VRS(n,b,base) REST_2VRS(n,b,base); REST_2VRS(n+2,b,base)
#define REST_8VRS(n,b,base) REST_4VRS(n,b,base); REST_4VRS(n+4,b,base)
#define REST_16VRS(n,b,base) REST_8VRS(n,b,base); REST_8VRS(n+8,b,base)
#define REST_32VRS(n,b,base) REST_16VRS(n,b,base); REST_16VRS(n+16,b,base)
#define SAVE_EVR(n,s,base) evmergehi s,s,n; stw s,THREAD_EVR0+4*(n)(base)
#define SAVE_2EVRS(n,s,base) SAVE_EVR(n,s,base); SAVE_EVR(n+1,s,base)
#define SAVE_4EVRS(n,s,base) SAVE_2EVRS(n,s,base); SAVE_2EVRS(n+2,s,base)
#define SAVE_8EVRS(n,s,base) SAVE_4EVRS(n,s,base); SAVE_4EVRS(n+4,s,base)
#define SAVE_16EVRS(n,s,base) SAVE_8EVRS(n,s,base); SAVE_8EVRS(n+8,s,base)
#define SAVE_32EVRS(n,s,base) SAVE_16EVRS(n,s,base); SAVE_16EVRS(n+16,s,base)
#define REST_EVR(n,s,base) lwz s,THREAD_EVR0+4*(n)(base); evmergelo n,s,n
#define REST_2EVRS(n,s,base) REST_EVR(n,s,base); REST_EVR(n+1,s,base)
#define REST_4EVRS(n,s,base) REST_2EVRS(n,s,base); REST_2EVRS(n+2,s,base)
#define REST_8EVRS(n,s,base) REST_4EVRS(n,s,base); REST_4EVRS(n+4,s,base)
#define REST_16EVRS(n,s,base) REST_8EVRS(n,s,base); REST_8EVRS(n+8,s,base)
#define REST_32EVRS(n,s,base) REST_16EVRS(n,s,base); REST_16EVRS(n+16,s,base)
/* Macros to adjust thread priority for hardware multithreading */
#define HMT_VERY_LOW or 31,31,31 # very low priority
#define HMT_LOW or 1,1,1
#define HMT_MEDIUM_LOW or 6,6,6 # medium low priority
#define HMT_MEDIUM or 2,2,2
#define HMT_MEDIUM_HIGH or 5,5,5 # medium high priority
#define HMT_HIGH or 3,3,3
/* handle instructions that older assemblers may not know */
#define RFCI .long 0x4c000066 /* rfci instruction */
#define RFDI .long 0x4c00004e /* rfdi instruction */
#define RFMCI .long 0x4c00004c /* rfmci instruction */
#ifdef __KERNEL__
#ifdef CONFIG_PPC64
#define XGLUE(a,b) a##b
#define GLUE(a,b) XGLUE(a,b)
#define _GLOBAL(name) \
.section ".text"; \
.align 2 ; \
.globl name; \
.globl GLUE(.,name); \
.section ".opd","aw"; \
name: \
.quad GLUE(.,name); \
.quad .TOC.@tocbase; \
.quad 0; \
.previous; \
.type GLUE(.,name),@function; \
GLUE(.,name):
#define _INIT_GLOBAL(name) \
.section ".text.init.refok"; \
.align 2 ; \
.globl name; \
.globl GLUE(.,name); \
.section ".opd","aw"; \
name: \
.quad GLUE(.,name); \
.quad .TOC.@tocbase; \
.quad 0; \
.previous; \
.type GLUE(.,name),@function; \
GLUE(.,name):
#define _KPROBE(name) \
.section ".kprobes.text","a"; \
.align 2 ; \
.globl name; \
.globl GLUE(.,name); \
.section ".opd","aw"; \
name: \
.quad GLUE(.,name); \
.quad .TOC.@tocbase; \
.quad 0; \
.previous; \
.type GLUE(.,name),@function; \
GLUE(.,name):
#define _STATIC(name) \
.section ".text"; \
.align 2 ; \
.section ".opd","aw"; \
name: \
.quad GLUE(.,name); \
.quad .TOC.@tocbase; \
.quad 0; \
.previous; \
.type GLUE(.,name),@function; \
GLUE(.,name):
#define _INIT_STATIC(name) \
.section ".text.init.refok"; \
.align 2 ; \
.section ".opd","aw"; \
name: \
.quad GLUE(.,name); \
.quad .TOC.@tocbase; \
.quad 0; \
.previous; \
.type GLUE(.,name),@function; \
GLUE(.,name):
#else /* 32-bit */
#define _ENTRY(n) \
.globl n; \
n:
#define _GLOBAL(n) \
.text; \
.stabs __stringify(n:F-1),N_FUN,0,0,n;\
.globl n; \
n:
#define _KPROBE(n) \
.section ".kprobes.text","a"; \
.globl n; \
n:
#endif
/*
* LOAD_REG_IMMEDIATE(rn, expr)
* Loads the value of the constant expression 'expr' into register 'rn'
* using immediate instructions only. Use this when it's important not
* to reference other data (i.e. on ppc64 when the TOC pointer is not
* valid).
*
* LOAD_REG_ADDR(rn, name)
* Loads the address of label 'name' into register 'rn'. Use this when
* you don't particularly need immediate instructions only, but you need
* the whole address in one register (e.g. it's a structure address and
* you want to access various offsets within it). On ppc32 this is
* identical to LOAD_REG_IMMEDIATE.
*
* LOAD_REG_ADDRBASE(rn, name)
* ADDROFF(name)
* LOAD_REG_ADDRBASE loads part of the address of label 'name' into
* register 'rn'. ADDROFF(name) returns the remainder of the address as
* a constant expression. ADDROFF(name) is a signed expression < 16 bits
* in size, so is suitable for use directly as an offset in load and store
* instructions. Use this when loading/storing a single word or less as:
* LOAD_REG_ADDRBASE(rX, name)
* ld rY,ADDROFF(name)(rX)
*/
#ifdef __powerpc64__
#define LOAD_REG_IMMEDIATE(reg,expr) \
lis (reg),(expr)@highest; \
ori (reg),(reg),(expr)@higher; \
rldicr (reg),(reg),32,31; \
oris (reg),(reg),(expr)@h; \
ori (reg),(reg),(expr)@l;
#define LOAD_REG_ADDR(reg,name) \
ld (reg),name@got(r2)
#define LOAD_REG_ADDRBASE(reg,name) LOAD_REG_ADDR(reg,name)
#define ADDROFF(name) 0
/* offsets for stack frame layout */
#define LRSAVE 16
#else /* 32-bit */
#define LOAD_REG_IMMEDIATE(reg,expr) \
lis (reg),(expr)@ha; \
addi (reg),(reg),(expr)@l;
#define LOAD_REG_ADDR(reg,name) LOAD_REG_IMMEDIATE(reg, name)
#define LOAD_REG_ADDRBASE(reg, name) lis (reg),name@ha
#define ADDROFF(name) name@l
/* offsets for stack frame layout */
#define LRSAVE 4
#endif
/* various errata or part fixups */
#ifdef CONFIG_PPC601_SYNC_FIX
#define SYNC \
BEGIN_FTR_SECTION \
sync; \
isync; \
END_FTR_SECTION_IFSET(CPU_FTR_601)
#define SYNC_601 \
BEGIN_FTR_SECTION \
sync; \
END_FTR_SECTION_IFSET(CPU_FTR_601)
#define ISYNC_601 \
BEGIN_FTR_SECTION \
isync; \
END_FTR_SECTION_IFSET(CPU_FTR_601)
#else
#define SYNC
#define SYNC_601
#define ISYNC_601
#endif
#ifdef CONFIG_PPC_CELL
#define MFTB(dest) \
90: mftb dest; \
BEGIN_FTR_SECTION_NESTED(96); \
cmpwi dest,0; \
beq- 90b; \
END_FTR_SECTION_NESTED(CPU_FTR_CELL_TB_BUG, CPU_FTR_CELL_TB_BUG, 96)
#else
#define MFTB(dest) mftb dest
#endif
#ifndef CONFIG_SMP
#define TLBSYNC
#else /* CONFIG_SMP */
/* tlbsync is not implemented on 601 */
#define TLBSYNC \
BEGIN_FTR_SECTION \
tlbsync; \
sync; \
END_FTR_SECTION_IFCLR(CPU_FTR_601)
#endif
/*
* This instruction is not implemented on the PPC 603 or 601; however, on
* the 403GCX and 405GP tlbia IS defined and tlbie is not.
* All of these instructions exist in the 8xx, they have magical powers,
* and they must be used.
*/
#if !defined(CONFIG_4xx) && !defined(CONFIG_8xx)
#define tlbia \
li r4,1024; \
mtctr r4; \
lis r4,KERNELBASE@h; \
0: tlbie r4; \
addi r4,r4,0x1000; \
bdnz 0b
#endif
#ifdef CONFIG_IBM440EP_ERR42
#define PPC440EP_ERR42 isync
#else
#define PPC440EP_ERR42
#endif
#if defined(CONFIG_BOOKE)
#define toreal(rd)
#define fromreal(rd)
#define tophys(rd,rs) \
addis rd,rs,0
#define tovirt(rd,rs) \
addis rd,rs,0
#elif defined(CONFIG_PPC64)
#define toreal(rd) /* we can access c000... in real mode */
#define fromreal(rd)
#define tophys(rd,rs) \
clrldi rd,rs,2
#define tovirt(rd,rs) \
rotldi rd,rs,16; \
ori rd,rd,((KERNELBASE>>48)&0xFFFF);\
rotldi rd,rd,48
#else
/*
* On APUS (Amiga PowerPC cpu upgrade board), we don't know the
* physical base address of RAM at compile time.
*/
#define toreal(rd) tophys(rd,rd)
#define fromreal(rd) tovirt(rd,rd)
#define tophys(rd,rs) \
0: addis rd,rs,-KERNELBASE@h; \
.section ".vtop_fixup","aw"; \
.align 1; \
.long 0b; \
.previous
#define tovirt(rd,rs) \
0: addis rd,rs,KERNELBASE@h; \
.section ".ptov_fixup","aw"; \
.align 1; \
.long 0b; \
.previous
#endif
#ifdef CONFIG_PPC64
#define RFI rfid
#define MTMSRD(r) mtmsrd r
#else
#define FIX_SRR1(ra, rb)
#ifndef CONFIG_40x
#define RFI rfi
#else
#define RFI rfi; b . /* Prevent prefetch past rfi */
#endif
#define MTMSRD(r) mtmsr r
#define CLR_TOP32(r)
#endif
#endif /* __KERNEL__ */
/* The boring bits... */
/* Condition Register Bit Fields */
#define cr0 0
#define cr1 1
#define cr2 2
#define cr3 3
#define cr4 4
#define cr5 5
#define cr6 6
#define cr7 7
/* General Purpose Registers (GPRs) */
#define r0 0
#define r1 1
#define r2 2
#define r3 3
#define r4 4
#define r5 5
#define r6 6
#define r7 7
#define r8 8
#define r9 9
#define r10 10
#define r11 11
#define r12 12
#define r13 13
#define r14 14
#define r15 15
#define r16 16
#define r17 17
#define r18 18
#define r19 19
#define r20 20
#define r21 21
#define r22 22
#define r23 23
#define r24 24
#define r25 25
#define r26 26
#define r27 27
#define r28 28
#define r29 29
#define r30 30
#define r31 31
/* Floating Point Registers (FPRs) */
#define fr0 0
#define fr1 1
#define fr2 2
#define fr3 3
#define fr4 4
#define fr5 5
#define fr6 6
#define fr7 7
#define fr8 8
#define fr9 9
#define fr10 10
#define fr11 11
#define fr12 12
#define fr13 13
#define fr14 14
#define fr15 15
#define fr16 16
#define fr17 17
#define fr18 18
#define fr19 19
#define fr20 20
#define fr21 21
#define fr22 22
#define fr23 23
#define fr24 24
#define fr25 25
#define fr26 26
#define fr27 27
#define fr28 28
#define fr29 29
#define fr30 30
#define fr31 31
/* AltiVec Registers (VPRs) */
#define vr0 0
#define vr1 1
#define vr2 2
#define vr3 3
#define vr4 4
#define vr5 5
#define vr6 6
#define vr7 7
#define vr8 8
#define vr9 9
#define vr10 10
#define vr11 11
#define vr12 12
#define vr13 13
#define vr14 14
#define vr15 15
#define vr16 16
#define vr17 17
#define vr18 18
#define vr19 19
#define vr20 20
#define vr21 21
#define vr22 22
#define vr23 23
#define vr24 24
#define vr25 25
#define vr26 26
#define vr27 27
#define vr28 28
#define vr29 29
#define vr30 30
#define vr31 31
/* SPE Registers (EVPRs) */
#define evr0 0
#define evr1 1
#define evr2 2
#define evr3 3
#define evr4 4
#define evr5 5
#define evr6 6
#define evr7 7
#define evr8 8
#define evr9 9
#define evr10 10
#define evr11 11
#define evr12 12
#define evr13 13
#define evr14 14
#define evr15 15
#define evr16 16
#define evr17 17
#define evr18 18
#define evr19 19
#define evr20 20
#define evr21 21
#define evr22 22
#define evr23 23
#define evr24 24
#define evr25 25
#define evr26 26
#define evr27 27
#define evr28 28
#define evr29 29
#define evr30 30
#define evr31 31
/* some stab codes */
#define N_FUN 36
#define N_RSYM 64
#define N_SLINE 68
#define N_SO 100
#endif /* __ASSEMBLY__ */
#endif /* _ASM_POWERPC_PPC_ASM_H */
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