Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1762355AbZD3Pzd (ORCPT ); Thu, 30 Apr 2009 11:55:33 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932469AbZD3PnM (ORCPT ); Thu, 30 Apr 2009 11:43:12 -0400 Received: from moutng.kundenserver.de ([212.227.126.188]:54874 "EHLO moutng.kundenserver.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932323AbZD3PmC (ORCPT ); Thu, 30 Apr 2009 11:42:02 -0400 Message-Id: <265d330107973ffda3b4b8a3c26ec93f31dfdf00.1241105648.git.arnd@arndb.de> In-Reply-To: References: From: Arnd Bergmann Date: Tue, 28 Apr 2009 16:15:26 +0200 Subject: [PATCH 08/27] asm-generic: add generic versions of common headers Cc: linux-arch@vger.kernel.org, Michal Simek , Remis Lima Baima , linux-kernel@vger.kernel.org X-Provags-ID: V01U2FsdGVkX1+T9CF5xmP2t2q4VgVqElh707b1yIeZSdMScGg z0CDMVxrp9yBbP9VnCrYvqt6oyohokJyZ4B9St3Mtg+9gjlcQ+ mTRiQOdOFisB89AMfXHiw== To: unlisted-recipients:; (no To-header on input) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 16471 Lines: 615 These are all kernel internal interfaces that get copied around a lot. In most cases, architectures can provide their own optimized versions, but these generic versions can work as well. I have tried to use the most common contents of each header to allow existing architectures to migrate easily. Signed-off-by: Arnd Bergmann Signed-off-by: Remis Lima Baima --- include/asm-generic/bugs.h | 10 +++ include/asm-generic/current.h | 9 ++ include/asm-generic/delay.h | 9 ++ include/asm-generic/fb.h | 12 +++ include/asm-generic/hardirq.h | 34 ++++++++ include/asm-generic/irq.h | 18 ++++ include/asm-generic/irqflags.h | 72 ++++++++++++++++ include/asm-generic/kmap_types.h | 29 +++++++ include/asm-generic/linkage.h | 8 ++ include/asm-generic/module.h | 22 +++++ include/asm-generic/mutex.h | 9 ++ include/asm-generic/scatterlist.h | 43 ++++++++++ include/asm-generic/spinlock.h | 11 +++ include/asm-generic/string.h | 10 +++ include/asm-generic/system.h | 161 +++++++++++++++++++++++++++++++++++++ include/asm-generic/user.h | 8 ++ 16 files changed, 465 insertions(+), 0 deletions(-) create mode 100644 include/asm-generic/bugs.h create mode 100644 include/asm-generic/current.h create mode 100644 include/asm-generic/delay.h create mode 100644 include/asm-generic/fb.h create mode 100644 include/asm-generic/hardirq.h create mode 100644 include/asm-generic/irq.h create mode 100644 include/asm-generic/irqflags.h create mode 100644 include/asm-generic/kmap_types.h create mode 100644 include/asm-generic/linkage.h create mode 100644 include/asm-generic/module.h create mode 100644 include/asm-generic/mutex.h create mode 100644 include/asm-generic/scatterlist.h create mode 100644 include/asm-generic/spinlock.h create mode 100644 include/asm-generic/string.h create mode 100644 include/asm-generic/system.h create mode 100644 include/asm-generic/user.h diff --git a/include/asm-generic/bugs.h b/include/asm-generic/bugs.h new file mode 100644 index 0000000..6c4f62e --- /dev/null +++ b/include/asm-generic/bugs.h @@ -0,0 +1,10 @@ +#ifndef __ASM_GENERIC_BUGS_H +#define __ASM_GENERIC_BUGS_H +/* + * This file is included by 'init/main.c' to check for + * architecture-dependent bugs. + */ + +static inline void check_bugs(void) { } + +#endif /* __ASM_GENERIC_BUGS_H */ diff --git a/include/asm-generic/current.h b/include/asm-generic/current.h new file mode 100644 index 0000000..5e86f6a --- /dev/null +++ b/include/asm-generic/current.h @@ -0,0 +1,9 @@ +#ifndef __ASM_GENERIC_CURRENT_H +#define __ASM_GENERIC_CURRENT_H + +#include + +#define get_current() (current_thread_info()->task) +#define current get_current() + +#endif /* __ASM_GENERIC_CURRENT_H */ diff --git a/include/asm-generic/delay.h b/include/asm-generic/delay.h new file mode 100644 index 0000000..4586fec --- /dev/null +++ b/include/asm-generic/delay.h @@ -0,0 +1,9 @@ +#ifndef __ASM_GENERIC_DELAY_H +#define __ASM_GENERIC_DELAY_H + +extern void __udelay(unsigned long usecs); +extern void __delay(unsigned long loops); + +#define udelay(n) __udelay(n) + +#endif /* __ASM_GENERIC_DELAY_H */ diff --git a/include/asm-generic/fb.h b/include/asm-generic/fb.h new file mode 100644 index 0000000..fe8ca7f --- /dev/null +++ b/include/asm-generic/fb.h @@ -0,0 +1,12 @@ +#ifndef __ASM_GENERIC_FB_H_ +#define __ASM_GENERIC_FB_H_ +#include + +#define fb_pgprotect(...) do {} while (0) + +static inline int fb_is_primary_device(struct fb_info *info) +{ + return 0; +} + +#endif /* __ASM_GENERIC_FB_H_ */ diff --git a/include/asm-generic/hardirq.h b/include/asm-generic/hardirq.h new file mode 100644 index 0000000..3d5d2c9 --- /dev/null +++ b/include/asm-generic/hardirq.h @@ -0,0 +1,34 @@ +#ifndef __ASM_GENERIC_HARDIRQ_H +#define __ASM_GENERIC_HARDIRQ_H + +#include +#include +#include + +typedef struct { + unsigned long __softirq_pending; +} ____cacheline_aligned irq_cpustat_t; + +#include /* Standard mappings for irq_cpustat_t above */ + +#ifndef HARDIRQ_BITS +#define HARDIRQ_BITS 8 +#endif + +/* + * The hardirq mask has to be large enough to have + * space for potentially all IRQ sources in the system + * nesting on a single CPU: + */ +#if (1 << HARDIRQ_BITS) < NR_IRQS +# error HARDIRQ_BITS is too low! +#endif + +#ifndef ack_bad_irq +static inline void ack_bad_irq(unsigned int irq) +{ + printk(KERN_CRIT "unexpected IRQ trap at vector %02x\n", irq); +} +#endif + +#endif /* __ASM_GENERIC_HARDIRQ_H */ diff --git a/include/asm-generic/irq.h b/include/asm-generic/irq.h new file mode 100644 index 0000000..b90ec0b --- /dev/null +++ b/include/asm-generic/irq.h @@ -0,0 +1,18 @@ +#ifndef __ASM_GENERIC_IRQ_H +#define __ASM_GENERIC_IRQ_H + +/* + * NR_IRQS is the upper bound of how many interrupts can be handled + * in the platform. It is used to size the static irq_map array, + * so don't make it too big. + */ +#ifndef NR_IRQS +#define NR_IRQS 64 +#endif + +static inline int irq_canonicalize(int irq) +{ + return irq; +} + +#endif /* __ASM_GENERIC_IRQ_H */ diff --git a/include/asm-generic/irqflags.h b/include/asm-generic/irqflags.h new file mode 100644 index 0000000..9aebf61 --- /dev/null +++ b/include/asm-generic/irqflags.h @@ -0,0 +1,72 @@ +#ifndef __ASM_GENERIC_IRQFLAGS_H +#define __ASM_GENERIC_IRQFLAGS_H + +/* + * All architectures should implement at least the first two functions, + * usually inline assembly will be the best way. + */ +#ifndef RAW_IRQ_DISABLED +#define RAW_IRQ_DISABLED 0 +#define RAW_IRQ_ENABLED 1 +#endif + +/* read interrupt enabled status */ +#ifndef __raw_local_save_flags +unsigned long __raw_local_save_flags(void); +#endif + +/* set interrupt enabled status */ +#ifndef raw_local_irq_restore +void raw_local_irq_restore(unsigned long flags); +#endif + +/* get status and disable interrupts */ +#ifndef __raw_local_irq_save +static inline unsigned long __raw_local_irq_save(void) +{ + unsigned long flags; + flags = __raw_local_save_flags(); + raw_local_irq_restore(RAW_IRQ_DISABLED); + return flags; +} +#endif + +/* test flags */ +#ifndef raw_irqs_disabled_flags +static inline int raw_irqs_disabled_flags(unsigned long flags) +{ + return flags == RAW_IRQ_DISABLED; +} +#endif + +/* unconditionally enable interrupts */ +#ifndef raw_local_irq_enable +static inline void raw_local_irq_enable(void) +{ + raw_local_irq_restore(RAW_IRQ_ENABLED); +} +#endif + +/* unconditionally disable interrupts */ +#ifndef raw_local_irq_disable +static inline void raw_local_irq_disable(void) +{ + raw_local_irq_restore(RAW_IRQ_DISABLED); +} +#endif + +/* test hardware interrupt enable bit */ +#ifndef raw_irqs_disabled +static inline int raw_irqs_disabled(void) +{ + return raw_irqs_disabled_flags(__raw_local_save_flags()); +} +#endif + +#define raw_local_save_flags(flags) \ + do { (flags) = __raw_local_save_flags(); } while (0) + +#define raw_local_irq_save(flags) \ + do { (flags) = __raw_local_irq_save(); } while (0) + +#endif /* __ASM_GENERIC_IRQFLAGS_H */ diff --git a/include/asm-generic/kmap_types.h b/include/asm-generic/kmap_types.h new file mode 100644 index 0000000..36996bc --- /dev/null +++ b/include/asm-generic/kmap_types.h @@ -0,0 +1,29 @@ +#ifndef __ASM_GENERIC_KMAP_TYPES_H +#define __ASM_GENERIC_KMAP_TYPES_H + +#ifdef CONFIG_DEBUG_HIGHMEM +# define D(n) __KM_FENCE_##n , +#else +# define D(n) +#endif + +enum km_type { +D(0) KM_BOUNCE_READ, +D(1) KM_SKB_SUNRPC_DATA, +D(2) KM_SKB_DATA_SOFTIRQ, +D(3) KM_USER0, +D(4) KM_USER1, +D(5) KM_BIO_SRC_IRQ, +D(6) KM_BIO_DST_IRQ, +D(7) KM_PTE0, +D(8) KM_PTE1, +D(9) KM_IRQ0, +D(10) KM_IRQ1, +D(11) KM_SOFTIRQ0, +D(12) KM_SOFTIRQ1, +D(13) KM_TYPE_NR +}; + +#undef D + +#endif /* __ASM_GENERIC_KMAP_TYPES_H */ diff --git a/include/asm-generic/linkage.h b/include/asm-generic/linkage.h new file mode 100644 index 0000000..fef7a01 --- /dev/null +++ b/include/asm-generic/linkage.h @@ -0,0 +1,8 @@ +#ifndef __ASM_GENERIC_LINKAGE_H +#define __ASM_GENERIC_LINKAGE_H +/* + * linux/linkage.h provides reasonable defaults. + * an architecture can override them by providing its own version. + */ + +#endif /* __ASM_GENERIC_LINKAGE_H */ diff --git a/include/asm-generic/module.h b/include/asm-generic/module.h new file mode 100644 index 0000000..ed5b44d --- /dev/null +++ b/include/asm-generic/module.h @@ -0,0 +1,22 @@ +#ifndef __ASM_GENERIC_MODULE_H +#define __ASM_GENERIC_MODULE_H + +/* + * Many architectures just need a simple module + * loader without arch specific data. + */ +struct mod_arch_specific +{ +}; + +#ifdef CONFIG_64BIT +#define Elf_Shdr Elf64_Shdr +#define Elf_Sym Elf64_Sym +#define Elf_Ehdr Elf64_Ehdr +#else +#define Elf_Shdr Elf32_Shdr +#define Elf_Sym Elf32_Sym +#define Elf_Ehdr Elf32_Ehdr +#endif + +#endif /* __ASM_GENERIC_MODULE_H */ diff --git a/include/asm-generic/mutex.h b/include/asm-generic/mutex.h new file mode 100644 index 0000000..fe91ab5 --- /dev/null +++ b/include/asm-generic/mutex.h @@ -0,0 +1,9 @@ +#ifndef __ASM_GENERIC_MUTEX_H +#define __ASM_GENERIC_MUTEX_H +/* + * Pull in the generic implementation for the mutex fastpath, + * which is a reasonable default on many architectures. + */ + +#include +#endif /* __ASM_GENERIC_MUTEX_H */ diff --git a/include/asm-generic/scatterlist.h b/include/asm-generic/scatterlist.h new file mode 100644 index 0000000..8b94544 --- /dev/null +++ b/include/asm-generic/scatterlist.h @@ -0,0 +1,43 @@ +#ifndef __ASM_GENERIC_SCATTERLIST_H +#define __ASM_GENERIC_SCATTERLIST_H + +#include + +struct scatterlist { +#ifdef CONFIG_DEBUG_SG + unsigned long sg_magic; +#endif + unsigned long page_link; + unsigned int offset; + unsigned int length; + dma_addr_t dma_address; + unsigned int dma_length; +}; + +/* + * These macros should be used after a dma_map_sg call has been done + * to get bus addresses of each of the SG entries and their lengths. + * You should only work with the number of sg entries pci_map_sg + * returns, or alternatively stop on the first sg_dma_len(sg) which + * is 0. + */ +#define sg_dma_address(sg) ((sg)->dma_address) +#ifndef sg_dma_len +/* + * Normally, you have an iommu on 64 bit machines, but not on 32 bit + * machines. Architectures that are differnt should override this. + */ +#if __BITS_PER_LONG == 64 +#define sg_dma_len(sg) ((sg)->dma_length) +#else +#define sg_dma_len(sg) ((sg)->length) +#endif /* 64 bit */ +#endif /* sg_dma_len */ + +#ifndef ISA_DMA_THRESHOLD +#define ISA_DMA_THRESHOLD (~0UL) +#endif + +#define ARCH_HAS_SG_CHAIN + +#endif /* __ASM_GENERIC_SCATTERLIST_H */ diff --git a/include/asm-generic/spinlock.h b/include/asm-generic/spinlock.h new file mode 100644 index 0000000..1547a03 --- /dev/null +++ b/include/asm-generic/spinlock.h @@ -0,0 +1,11 @@ +#ifndef __ASM_GENERIC_SPINLOCK_H +#define __ASM_GENERIC_SPINLOCK_H +/* + * You need to implement asm/spinlock.h for SMP support. The generic + * version does not handle SMP. + */ +#ifdef CONFIG_SMP +#error need an architecture specific asm/spinlock.h +#endif + +#endif /* __ASM_GENERIC_SPINLOCK_H */ diff --git a/include/asm-generic/string.h b/include/asm-generic/string.h new file mode 100644 index 0000000..de5e020 --- /dev/null +++ b/include/asm-generic/string.h @@ -0,0 +1,10 @@ +#ifndef __ASM_GENERIC_STRING_H +#define __ASM_GENERIC_STRING_H +/* + * The kernel provides all required functions in lib/string.c + * + * Architectures probably want to provide at least their own optimized + * memcpy and memset functions though. + */ + +#endif /* __ASM_GENERIC_STRING_H */ diff --git a/include/asm-generic/system.h b/include/asm-generic/system.h new file mode 100644 index 0000000..efa403b --- /dev/null +++ b/include/asm-generic/system.h @@ -0,0 +1,161 @@ +/* Generic system definitions, based on MN10300 definitions. + * + * It should be possible to use these on really simple architectures, + * but it serves more as a starting point for new ports. + * + * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved. + * Written by David Howells (dhowells@redhat.com) + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public Licence + * as published by the Free Software Foundation; either version + * 2 of the Licence, or (at your option) any later version. + */ +#ifndef __ASM_GENERIC_SYSTEM_H +#define __ASM_GENERIC_SYSTEM_H + +#ifdef __KERNEL__ +#ifndef __ASSEMBLY__ + +#include +#include + +#include + +struct task_struct; + +/* context switching is now performed out-of-line in switch_to.S */ +extern struct task_struct *__switch_to(struct task_struct *, + struct task_struct *); +#define switch_to(prev, next, last) \ + do { \ + ((last) = __switch_to((prev), (next))); \ + } while (0) + +#define arch_align_stack(x) (x) + +#define nop() asm volatile ("nop") + +#endif /* !__ASSEMBLY__ */ + +/* + * Force strict CPU ordering. + * And yes, this is required on UP too when we're talking + * to devices. + * + * This implementation only contains a compiler barrier. + */ + +#define mb() asm volatile ("": : :"memory") +#define rmb() mb() +#define wmb() asm volatile ("": : :"memory") + +#ifdef CONFIG_SMP +#define smp_mb() mb() +#define smp_rmb() rmb() +#define smp_wmb() wmb() +#else +#define smp_mb() barrier() +#define smp_rmb() barrier() +#define smp_wmb() barrier() +#endif + +#define set_mb(var, value) do { var = value; mb(); } while (0) +#define set_wmb(var, value) do { var = value; wmb(); } while (0) + +#define read_barrier_depends() do {} while (0) +#define smp_read_barrier_depends() do {} while (0) + +/* + * we make sure local_irq_enable() doesn't cause priority inversion + */ +#ifndef __ASSEMBLY__ + +/* This function doesn't exist, so you'll get a linker error + * if something tries to do an invalid xchg(). */ +extern void __xchg_called_with_bad_pointer(void); + +static inline +unsigned long __xchg(unsigned long x, volatile void *ptr, int size) +{ + unsigned long ret, flags; + + switch (size) { + case 1: +#ifdef __xchg_u8 + return __xchg_u8(x, ptr); +#else + local_irq_save(flags); + ret = *(volatile u8 *)ptr; + *(volatile u8 *)ptr = x; + local_irq_restore(flags); + return ret; +#endif /* __xchg_u8 */ + + case 2: +#ifdef __xchg_u16 + return __xchg_u16(x, ptr); +#else + local_irq_save(flags); + ret = *(volatile u16 *)ptr; + *(volatile u16 *)ptr = x; + local_irq_restore(flags); + return ret; +#endif /* __xchg_u16 */ + + case 4: +#ifdef __xchg_u32 + return __xchg_u32(x, ptr); +#else + local_irq_save(flags); + ret = *(volatile u32 *)ptr; + *(volatile u32 *)ptr = x; + local_irq_restore(flags); + return ret; +#endif /* __xchg_u32 */ + +#ifdef CONFIG_64BIT + case 8: +#ifdef __xchg_u64 + return __xchg_u64(x, ptr); +#else + local_irq_save(flags); + ret = *(volatile u64 *)ptr; + *(volatile u64 *)ptr = x; + local_irq_restore(flags); + return ret; +#endif /* __xchg_u64 */ +#endif /* CONFIG_64BIT */ + + default: + __xchg_called_with_bad_pointer(); + return x; + } +} + +#define xchg(ptr, x) \ + ((__typeof__(*(ptr))) __xchg((unsigned long)(x), (ptr), sizeof(*(ptr)))) + +static inline unsigned long __cmpxchg(volatile unsigned long *m, + unsigned long old, unsigned long new) +{ + unsigned long retval; + unsigned long flags; + + local_irq_save(flags); + retval = *m; + if (retval == old) + *m = new; + local_irq_restore(flags); + return retval; +} + +#define cmpxchg(ptr, o, n) \ + ((__typeof__(*(ptr))) __cmpxchg((unsigned long *)(ptr), \ + (unsigned long)(o), \ + (unsigned long)(n))) + +#endif /* !__ASSEMBLY__ */ + +#endif /* __KERNEL__ */ +#endif /* __ASM_GENERIC_SYSTEM_H */ diff --git a/include/asm-generic/user.h b/include/asm-generic/user.h new file mode 100644 index 0000000..8b9c3c9 --- /dev/null +++ b/include/asm-generic/user.h @@ -0,0 +1,8 @@ +#ifndef __ASM_GENERIC_USER_H +#define __ASM_GENERIC_USER_H +/* + * This file may define a 'struct user' structure. However, it it only + * used for a.out file, which are not supported on new architectures. + */ + +#endif /* __ASM_GENERIC_USER_H */ -- 1.5.6.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/