From ef6051a90e2ad1af636e99d1d4603fdcf2adfcbe Mon Sep 17 00:00:00 2001 From: Chris Zankel Date: Thu, 31 May 2007 17:41:14 -0700 Subject: [XTENSA] fix bit operations in bitops.h A macro used internally in the bitops.h file to identify the number of leading zeros (__cntlz) was implemented incorrectly for Xtensa processors that don't provide the 'nsa/nsau' instructions. As a result, the dependent functions and macros (ffs, ffz, fls) were broken. Signed-off-by: Chris Zankel --- include/asm-xtensa/bitops.h | 60 ++++++++++++++++++++------------------------- 1 file changed, 26 insertions(+), 34 deletions(-) (limited to 'include') diff --git a/include/asm-xtensa/bitops.h b/include/asm-xtensa/bitops.h index d815649617..96303dff3e 100644 --- a/include/asm-xtensa/bitops.h +++ b/include/asm-xtensa/bitops.h @@ -7,7 +7,7 @@ * License. See the file "COPYING" in the main directory of this archive * for more details. * - * Copyright (C) 2001 - 2005 Tensilica Inc. + * Copyright (C) 2001 - 2007 Tensilica Inc. */ #ifndef _XTENSA_BITOPS_H @@ -31,64 +31,44 @@ #if XCHAL_HAVE_NSA -static __inline__ int __cntlz (unsigned long x) +static inline unsigned long __cntlz (unsigned long x) { int lz; asm ("nsau %0, %1" : "=r" (lz) : "r" (x)); - return 31 - lz; + return lz; } -#else - -static __inline__ int __cntlz (unsigned long x) -{ - unsigned long sum, x1, x2, x4, x8, x16; - x1 = x & 0xAAAAAAAA; - x2 = x & 0xCCCCCCCC; - x4 = x & 0xF0F0F0F0; - x8 = x & 0xFF00FF00; - x16 = x & 0xFFFF0000; - sum = x2 ? 2 : 0; - sum += (x16 != 0) * 16; - sum += (x8 != 0) * 8; - sum += (x4 != 0) * 4; - sum += (x1 != 0); - - return sum; -} - -#endif - /* * ffz: Find first zero in word. Undefined if no zero exists. * bit 0 is the LSB of addr; bit 32 is the LSB of (addr+1). */ -static __inline__ int ffz(unsigned long x) +static inline int ffz(unsigned long x) { - if ((x = ~x) == 0) - return 32; - return __cntlz(x & -x); + return 31 - __cntlz(~x & -~x); } /* * __ffs: Find first bit set in word. Return 0 for bit 0 */ -static __inline__ int __ffs(unsigned long x) +static inline int __ffs(unsigned long x) { - return __cntlz(x & -x); + return 31 - __cntlz(x & -x); } + +#ifdef __KERNEL__ + /* * ffs: Find first bit set in word. This is defined the same way as * the libc and compiler builtin ffs routines, therefore * differs in spirit from the above ffz (man ffs). */ -static __inline__ int ffs(unsigned long x) +static inline int ffs(unsigned long x) { - return __cntlz(x & -x) + 1; + return 32 - __cntlz(x & -x); } /* @@ -96,10 +76,22 @@ static __inline__ int ffs(unsigned long x) * Note fls(0) = 0, fls(1) = 1, fls(0x80000000) = 32. */ -static __inline__ int fls (unsigned int x) +static inline int fls (unsigned int x) { - return __cntlz(x); + return 32 - __cntlz(x); } + +#else + +/* Use the generic implementation if we don't have the nsa/nsau instructions. */ + +# include +# include +# include +# include + +#endif + #include #include #include -- cgit v1.2.2 From 176fd6c96dcbc263eb1c61eae9fe2a33f23a876d Mon Sep 17 00:00:00 2001 From: Chris Zankel Date: Thu, 31 May 2007 17:46:09 -0700 Subject: [XTENSA] Use generic 64-bit division Use generic 64-bit division algorithm from the asm-generic directory.\ Signed-off-by: Chris Zankel --- include/asm-xtensa/div64.h | 15 +++------------ 1 file changed, 3 insertions(+), 12 deletions(-) (limited to 'include') diff --git a/include/asm-xtensa/div64.h b/include/asm-xtensa/div64.h index 20965e3af1..f35678cb0a 100644 --- a/include/asm-xtensa/div64.h +++ b/include/asm-xtensa/div64.h @@ -5,21 +5,12 @@ * License. See the file "COPYING" in the main directory of this archive * for more details. * - * Copyright (C) 2001 - 2005 Tensilica Inc. + * Copyright (C) 2001 - 2007 Tensilica Inc. */ #ifndef _XTENSA_DIV64_H #define _XTENSA_DIV64_H -#include +#include -#define do_div(n,base) ({ \ - int __res = n % ((unsigned int) base); \ - n /= (unsigned int) base; \ - __res; }) - -static inline uint64_t div64_64(uint64_t dividend, uint64_t divisor) -{ - return dividend / divisor; -} -#endif +#endif /* _XTENSA_DIV64_H */ -- cgit v1.2.2 From de4f6e5b41bef50fc981410ae8380f27f4e93bf8 Mon Sep 17 00:00:00 2001 From: Chris Zankel Date: Thu, 31 May 2007 17:47:01 -0700 Subject: [XTENSA] clean-up header files The header files in the asm-xtensa directory are not clean and 'make headers_check' fails. This is a first patch to fix most of the header files. It removes unnecessary include statements and adds some that are required for building the kernel. The linker script required some updates or the linking stage would fail. Signed-off-by: Chris Zankel --- include/asm-xtensa/bitops.h | 15 ++++++++------- include/asm-xtensa/byteorder.h | 3 ++- include/asm-xtensa/mmu_context.h | 1 + include/asm-xtensa/page.h | 2 +- include/asm-xtensa/param.h | 4 +--- include/asm-xtensa/ptrace.h | 5 +++-- include/asm-xtensa/shmparam.h | 2 -- include/asm-xtensa/thread_info.h | 2 ++ 8 files changed, 18 insertions(+), 16 deletions(-) (limited to 'include') diff --git a/include/asm-xtensa/bitops.h b/include/asm-xtensa/bitops.h index 96303dff3e..1c1e0d933e 100644 --- a/include/asm-xtensa/bitops.h +++ b/include/asm-xtensa/bitops.h @@ -57,9 +57,6 @@ static inline int __ffs(unsigned long x) return 31 - __cntlz(x & -x); } - -#ifdef __KERNEL__ - /* * ffs: Find first bit set in word. This is defined the same way as * the libc and compiler builtin ffs routines, therefore @@ -97,11 +94,15 @@ static inline int fls (unsigned int x) #include #ifdef __XTENSA_EL__ -# define ext2_set_bit_atomic(lock,nr,addr) test_and_set_bit((nr),(addr)) -# define ext2_clear_bit_atomic(lock,nr,addr) test_and_clear_bit((nr),(addr)) +# define ext2_set_bit_atomic(lock,nr,addr) \ + test_and_set_bit((nr), (unsigned long*)(addr)) +# define ext2_clear_bit_atomic(lock,nr,addr) \ + test_and_clear_bit((nr), (unsigned long*)(addr)) #elif defined(__XTENSA_EB__) -# define ext2_set_bit_atomic(lock,nr,addr) test_and_set_bit((nr) ^ 0x18, (addr)) -# define ext2_clear_bit_atomic(lock,nr,addr) test_and_clear_bit((nr)^0x18,(addr)) +# define ext2_set_bit_atomic(lock,nr,addr) \ + test_and_set_bit((nr) ^ 0x18, (unsigned long*)(addr)) +# define ext2_clear_bit_atomic(lock,nr,addr) \ + test_and_clear_bit((nr) ^ 0x18, (unsigned long*)(addr)) #else # error processor byte order undefined! #endif diff --git a/include/asm-xtensa/byteorder.h b/include/asm-xtensa/byteorder.h index 0f540a5f4c..765edf17a9 100644 --- a/include/asm-xtensa/byteorder.h +++ b/include/asm-xtensa/byteorder.h @@ -12,6 +12,7 @@ #define _XTENSA_BYTEORDER_H #include +#include static __inline__ __attribute_const__ __u32 ___arch__swab32(__u32 x) { @@ -78,4 +79,4 @@ static __inline__ __attribute_const__ __u16 ___arch__swab16(__u16 x) # error processor byte order undefined! #endif -#endif /* __ASM_XTENSA_BYTEORDER_H */ +#endif /* _XTENSA_BYTEORDER_H */ diff --git a/include/asm-xtensa/mmu_context.h b/include/asm-xtensa/mmu_context.h index 92f948392e..c0fd8e5b45 100644 --- a/include/asm-xtensa/mmu_context.h +++ b/include/asm-xtensa/mmu_context.h @@ -14,6 +14,7 @@ #define _XTENSA_MMU_CONTEXT_H #include +#include #include #include diff --git a/include/asm-xtensa/page.h b/include/asm-xtensa/page.h index c631d00619..1213cde754 100644 --- a/include/asm-xtensa/page.h +++ b/include/asm-xtensa/page.h @@ -131,6 +131,6 @@ void copy_user_page(void *to,void* from,unsigned long vaddr,struct page* page); #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \ VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) -#endif /* __KERNEL__ */ #include +#endif /* __KERNEL__ */ #endif /* _XTENSA_PAGE_H */ diff --git a/include/asm-xtensa/param.h b/include/asm-xtensa/param.h index 6f281392e3..ce3a336cad 100644 --- a/include/asm-xtensa/param.h +++ b/include/asm-xtensa/param.h @@ -11,15 +11,13 @@ #ifndef _XTENSA_PARAM_H #define _XTENSA_PARAM_H -#include - #ifdef __KERNEL__ # define HZ 100 /* internal timer frequency */ # define USER_HZ 100 /* for user interfaces in "ticks" */ # define CLOCKS_PER_SEC (USER_HZ) /* frequnzy at which times() counts */ #endif -#define EXEC_PAGESIZE (1 << XCHAL_MMU_MIN_PTE_PAGE_SIZE) +#define EXEC_PAGESIZE 4096 #ifndef NGROUPS #define NGROUPS 32 diff --git a/include/asm-xtensa/ptrace.h b/include/asm-xtensa/ptrace.h index 1b7fe363fa..cad83e814d 100644 --- a/include/asm-xtensa/ptrace.h +++ b/include/asm-xtensa/ptrace.h @@ -11,8 +11,6 @@ #ifndef _XTENSA_PTRACE_H #define _XTENSA_PTRACE_H -#include - /* * Kernel stack * @@ -113,6 +111,9 @@ struct pt_regs { }; #ifdef __KERNEL__ + +#include + # define task_pt_regs(tsk) ((struct pt_regs*) \ (task_stack_page(tsk) + KERNEL_STACK_SIZE - (XCHAL_NUM_AREGS-16)*4) - 1) # define user_mode(regs) (((regs)->ps & 0x00000020)!=0) diff --git a/include/asm-xtensa/shmparam.h b/include/asm-xtensa/shmparam.h index d3b65bfa71..c8cc16c3da 100644 --- a/include/asm-xtensa/shmparam.h +++ b/include/asm-xtensa/shmparam.h @@ -9,8 +9,6 @@ #ifndef _XTENSA_SHMPARAM_H #define _XTENSA_SHMPARAM_H -#include - /* * Xtensa can have variable size caches, and if * the size of single way is larger than the page size, diff --git a/include/asm-xtensa/thread_info.h b/include/asm-xtensa/thread_info.h index 5ae34ab715..3fa29799b4 100644 --- a/include/asm-xtensa/thread_info.h +++ b/include/asm-xtensa/thread_info.h @@ -116,6 +116,7 @@ static inline struct thread_info *current_thread_info(void) #define TIF_SINGLESTEP 4 /* restore singlestep on return to user mode */ #define TIF_IRET 5 /* return with iret */ #define TIF_MEMDIE 6 +#define TIF_RESTORE_SIGMASK 7 /* restore signal mask in do_signal() */ #define TIF_POLLING_NRFLAG 16 /* true if poll_idle() is polling TIF_NEED_RESCHED */ #define _TIF_SYSCALL_TRACE (1< Date: Thu, 31 May 2007 17:49:32 -0700 Subject: [XTENSA] Remove non-rt signal handling The non-rt signal handling was never really used, so we don't break anything. This patch also cleans up the signal stack-frame to make it independent from the processor configuration. It also improves the method used for controlling single-stepping. We now save and restore the 'icountlevel' register that controls single stepping and set or clear the saved state to enable or disable it. Signed-off-by: Chris Zankel --- include/asm-xtensa/coprocessor.h | 8 ++++++-- include/asm-xtensa/elf.h | 3 +-- include/asm-xtensa/ptrace.h | 3 ++- include/asm-xtensa/sigcontext.h | 24 +++++------------------- include/asm-xtensa/unistd.h | 4 ++-- 5 files changed, 16 insertions(+), 26 deletions(-) (limited to 'include') diff --git a/include/asm-xtensa/coprocessor.h b/include/asm-xtensa/coprocessor.h index bd09ec02d5..aa21210345 100644 --- a/include/asm-xtensa/coprocessor.h +++ b/include/asm-xtensa/coprocessor.h @@ -64,6 +64,7 @@ typedef struct { # define COPROCESSOR_INFO_SIZE 8 # endif #endif +#endif /* XCHAL_HAVE_CP */ #ifndef __ASSEMBLY__ @@ -74,8 +75,11 @@ extern void save_coprocessor_registers(void*, int); # else # define release_coprocessors(task) # endif -#endif -#endif +typedef unsigned char cp_state_t[XTENSA_CP_EXTRA_SIZE] + __attribute__ ((aligned (XTENSA_CP_EXTRA_ALIGN))); + +#endif /* !__ASSEMBLY__ */ + #endif /* _XTENSA_COPROCESSOR_H */ diff --git a/include/asm-xtensa/elf.h b/include/asm-xtensa/elf.h index f0f9fd8560..1569b53cec 100644 --- a/include/asm-xtensa/elf.h +++ b/include/asm-xtensa/elf.h @@ -13,7 +13,6 @@ #ifndef _XTENSA_ELF_H #define _XTENSA_ELF_H -#include #include /* Xtensa processor ELF architecture-magic number */ @@ -49,7 +48,7 @@ typedef struct { elf_greg_t lcount; elf_greg_t sar; elf_greg_t syscall; - elf_greg_t ar[XCHAL_NUM_AREGS]; + elf_greg_t ar[64]; } xtensa_gregset_t; #define ELF_NGREG (sizeof(xtensa_gregset_t) / sizeof(elf_greg_t)) diff --git a/include/asm-xtensa/ptrace.h b/include/asm-xtensa/ptrace.h index cad83e814d..77ff02d307 100644 --- a/include/asm-xtensa/ptrace.h +++ b/include/asm-xtensa/ptrace.h @@ -99,7 +99,8 @@ struct pt_regs { unsigned long windowbase; /* 48 */ unsigned long windowstart; /* 52 */ unsigned long syscall; /* 56 */ - int reserved[2]; /* 64 */ + unsigned long icountlevel; /* 60 */ + int reserved[1]; /* 64 */ /* Make sure the areg field is 16 bytes aligned. */ int align[0] __attribute__ ((aligned(16))); diff --git a/include/asm-xtensa/sigcontext.h b/include/asm-xtensa/sigcontext.h index a751772914..e3381cee50 100644 --- a/include/asm-xtensa/sigcontext.h +++ b/include/asm-xtensa/sigcontext.h @@ -5,21 +5,12 @@ * License. See the file "COPYING" in the main directory of this archive * for more details. * - * Copyright (C) 2001 - 2003 Tensilica Inc. + * Copyright (C) 2001 - 2007 Tensilica Inc. */ #ifndef _XTENSA_SIGCONTEXT_H #define _XTENSA_SIGCONTEXT_H -#define _ASMLANGUAGE -#include -#include - - -struct _cpstate { - unsigned char _cpstate[XTENSA_CP_EXTRA_SIZE]; -} __attribute__ ((aligned (XTENSA_CP_EXTRA_ALIGN))); - struct sigcontext { unsigned long oldmask; @@ -27,18 +18,13 @@ struct sigcontext { /* CPU registers */ unsigned long sc_pc; unsigned long sc_ps; - unsigned long sc_wmask; - unsigned long sc_windowbase; - unsigned long sc_windowstart; unsigned long sc_lbeg; unsigned long sc_lend; unsigned long sc_lcount; unsigned long sc_sar; - unsigned long sc_depc; - unsigned long sc_dareg0; - unsigned long sc_treg[4]; - unsigned long sc_areg[XCHAL_NUM_AREGS]; - struct _cpstate *sc_cpstate; + unsigned long sc_acclo; + unsigned long sc_acchi; + unsigned long sc_a[16]; }; -#endif /* __ASM_XTENSA_SIGCONTEXT_H */ +#endif /* _XTENSA_SIGCONTEXT_H */ diff --git a/include/asm-xtensa/unistd.h b/include/asm-xtensa/unistd.h index 8a7fb6964c..9bd3402443 100644 --- a/include/asm-xtensa/unistd.h +++ b/include/asm-xtensa/unistd.h @@ -485,8 +485,8 @@ __SYSCALL(217, sys_sched_get_priority_min, 1) __SYSCALL(218, sys_sched_rr_get_interval, 2) #define __NR_sched_yield 219 __SYSCALL(219, sys_sched_yield, 0) -#define __NR_sigreturn 222 -__SYSCALL(222, xtensa_sigreturn, 0) +#define __NR_available222 222 +__SYSCALL(222, sys_ni_syscall, 0) /* Signal Handling */ -- cgit v1.2.2 From df5e38703d647b160d7ba300b3d2fcb64a48549a Mon Sep 17 00:00:00 2001 From: Stephen Rothwell Date: Thu, 31 May 2007 20:18:25 -0700 Subject: Xtensa: use asm-generic/fcntl.h Commit fc4fb2adf944d45a7f3d4d38df991c79ffdb6a43 "fixed" the Xtensa asm/fcntl.h and in doing so ignored asm-generic/fcntl.h completely. It turns out that it is now exactly the same as asm-generic/fcntl.h. Signed-off-by: Stephen Rothwell Signed-off-by: Chris Zankel Signed-off-by: Andrew Morton --- include/asm-xtensa/fcntl.h | 100 +-------------------------------------------- 1 file changed, 1 insertion(+), 99 deletions(-) (limited to 'include') diff --git a/include/asm-xtensa/fcntl.h b/include/asm-xtensa/fcntl.h index 0609fc691b..46ab12db57 100644 --- a/include/asm-xtensa/fcntl.h +++ b/include/asm-xtensa/fcntl.h @@ -1,99 +1 @@ -/* - * include/asm-xtensa/fcntl.h - * - * This file is subject to the terms and conditions of the GNU General Public - * License. See the file "COPYING" in the main directory of this archive - * for more details. - * - * Copyright (C) 1995, 1996, 1997, 1998 by Ralf Baechle - * Copyright (C) 2001 - 2005 Tensilica Inc. - */ - -#ifndef _XTENSA_FCNTL_H -#define _XTENSA_FCNTL_H - -/* open/fcntl - O_SYNC is only implemented on blocks devices and on files - located on an ext2 file system */ -#define O_ACCMODE 0003 -#define O_RDONLY 00 -#define O_WRONLY 01 -#define O_RDWR 02 -#define O_CREAT 0100 /* not fcntl */ -#define O_EXCL 0200 /* not fcntl */ -#define O_NOCTTY 0400 /* not fcntl */ -#define O_TRUNC 01000 /* not fcntl */ -#define O_APPEND 02000 -#define O_NONBLOCK 04000 -#define O_NDELAY O_NONBLOCK -#define O_SYNC 010000 -#define FASYNC 020000 /* fcntl, for BSD compatibility */ -#define O_DIRECT 040000 /* direct disk access hint */ -#define O_LARGEFILE 0100000 -#define O_DIRECTORY 0200000 /* must be a directory */ -#define O_NOFOLLOW 0400000 /* don't follow links */ -#define O_NOATIME 01000000 - -#define F_DUPFD 0 /* dup */ -#define F_GETFD 1 /* get close_on_exec */ -#define F_SETFD 2 /* set/clear close_on_exec */ -#define F_GETFL 3 /* get file->f_flags */ -#define F_SETFL 4 /* set file->f_flags */ -#define F_GETLK 5 -#define F_SETLK 6 -#define F_SETLKW 7 - -#define F_SETOWN 8 /* for sockets. */ -#define F_GETOWN 9 /* for sockets. */ -#define F_SETSIG 10 /* for sockets. */ -#define F_GETSIG 11 /* for sockets. */ - -#define F_GETLK64 12 /* using 'struct flock64' */ -#define F_SETLK64 13 -#define F_SETLKW64 14 - -/* for F_[GET|SET]FL */ -#define FD_CLOEXEC 1 /* actually anything with low bit set goes */ - -/* for posix fcntl() and lockf() */ -#define F_RDLCK 0 -#define F_WRLCK 1 -#define F_UNLCK 2 - -/* for old implementation of bsd flock () */ -#define F_EXLCK 4 /* or 3 */ -#define F_SHLCK 8 /* or 4 */ - -/* for leases */ -#define F_INPROGRESS 16 - -/* operations for bsd flock(), also used by the kernel implementation */ -#define LOCK_SH 1 /* shared lock */ -#define LOCK_EX 2 /* exclusive lock */ -#define LOCK_NB 4 /* or'd with one of the above to prevent - blocking */ -#define LOCK_UN 8 /* remove lock */ - -#define LOCK_MAND 32 /* This is a mandatory flock */ -#define LOCK_READ 64 /* ... Which allows concurrent read operations */ -#define LOCK_WRITE 128 /* ... Which allows concurrent write operations */ -#define LOCK_RW 192 /* ... Which allows concurrent read & write ops */ - -struct flock { - short l_type; - short l_whence; - off_t l_start; - off_t l_len; - pid_t l_pid; -}; - -struct flock64 { - short l_type; - short l_whence; - loff_t l_start; - loff_t l_len; - pid_t l_pid; -}; - -#define F_LINUX_SPECIFIC_BASE 1024 - -#endif /* _XTENSA_FCNTL_H */ +#include -- cgit v1.2.2