diff options
Diffstat (limited to 'arch/tile')
| -rw-r--r-- | arch/tile/include/asm/byteorder.h | 20 | ||||
| -rw-r--r-- | arch/tile/include/asm/elf.h | 5 | ||||
| -rw-r--r-- | arch/tile/include/hv/hypervisor.h | 16 | ||||
| -rw-r--r-- | arch/tile/kernel/module.c | 12 | ||||
| -rw-r--r-- | arch/tile/kernel/single_step.c | 16 | ||||
| -rw-r--r-- | arch/tile/lib/memchr_64.c | 8 | ||||
| -rw-r--r-- | arch/tile/lib/memcpy_64.c | 23 | ||||
| -rw-r--r-- | arch/tile/lib/strchr_64.c | 15 | ||||
| -rw-r--r-- | arch/tile/lib/string-endian.h | 33 | ||||
| -rw-r--r-- | arch/tile/lib/strlen_64.c | 11 |
10 files changed, 130 insertions, 29 deletions
diff --git a/arch/tile/include/asm/byteorder.h b/arch/tile/include/asm/byteorder.h index 9558416d578b..fb72ecf49218 100644 --- a/arch/tile/include/asm/byteorder.h +++ b/arch/tile/include/asm/byteorder.h @@ -1 +1,21 @@ +/* + * Copyright 2011 Tilera Corporation. All Rights Reserved. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation, version 2. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or + * NON INFRINGEMENT. See the GNU General Public License for + * more details. + */ + +#if defined (__BIG_ENDIAN__) +#include <linux/byteorder/big_endian.h> +#elif defined (__LITTLE_ENDIAN__) #include <linux/byteorder/little_endian.h> +#else +#error "__BIG_ENDIAN__ or __LITTLE_ENDIAN__ must be defined." +#endif diff --git a/arch/tile/include/asm/elf.h b/arch/tile/include/asm/elf.h index 623a6bb741c1..d16d006d660e 100644 --- a/arch/tile/include/asm/elf.h +++ b/arch/tile/include/asm/elf.h @@ -44,7 +44,11 @@ typedef elf_fpreg_t elf_fpregset_t[ELF_NFPREG]; #else #define ELF_CLASS ELFCLASS32 #endif +#ifdef __BIG_ENDIAN__ +#define ELF_DATA ELFDATA2MSB +#else #define ELF_DATA ELFDATA2LSB +#endif /* * There seems to be a bug in how compat_binfmt_elf.c works: it @@ -59,6 +63,7 @@ enum { ELF_ARCH = CHIP_ELF_TYPE() }; */ #define elf_check_arch(x) \ ((x)->e_ident[EI_CLASS] == ELF_CLASS && \ + (x)->e_ident[EI_DATA] == ELF_DATA && \ (x)->e_machine == CHIP_ELF_TYPE()) /* The module loader only handles a few relocation types. */ diff --git a/arch/tile/include/hv/hypervisor.h b/arch/tile/include/hv/hypervisor.h index 793123e116fd..df74223944b5 100644 --- a/arch/tile/include/hv/hypervisor.h +++ b/arch/tile/include/hv/hypervisor.h @@ -494,11 +494,16 @@ int hv_confstr(HV_ConfstrQuery query, HV_VirtAddr buf, int len); /** Tile coordinate */ typedef struct { +#ifndef __BIG_ENDIAN__ /** X coordinate, relative to supervisor's top-left coordinate */ int x; /** Y coordinate, relative to supervisor's top-left coordinate */ int y; +#else + int y; + int x; +#endif } HV_Coord; @@ -986,8 +991,13 @@ HV_VirtAddrRange hv_inquire_virtual(int idx); /** A range of ASID values. */ typedef struct { +#ifndef __BIG_ENDIAN__ HV_ASID start; /**< First ASID in the range. */ unsigned int size; /**< Number of ASIDs. Zero for an invalid range. */ +#else + unsigned int size; /**< Number of ASIDs. Zero for an invalid range. */ + HV_ASID start; /**< First ASID in the range. */ +#endif } HV_ASIDRange; /** Returns information about a range of ASIDs. @@ -1308,6 +1318,7 @@ typedef enum /** Message recipient. */ typedef struct { +#ifndef __BIG_ENDIAN__ /** X coordinate, relative to supervisor's top-left coordinate */ unsigned int x:11; @@ -1316,6 +1327,11 @@ typedef struct /** Status of this recipient */ HV_Recip_State state:10; +#else //__BIG_ENDIAN__ + HV_Recip_State state:10; + unsigned int y:11; + unsigned int x:11; +#endif } HV_Recipient; /** Send a message to a set of recipients. diff --git a/arch/tile/kernel/module.c b/arch/tile/kernel/module.c index 98d476920106..001cbfa10ac6 100644 --- a/arch/tile/kernel/module.c +++ b/arch/tile/kernel/module.c @@ -159,7 +159,17 @@ int apply_relocate_add(Elf_Shdr *sechdrs, switch (ELF_R_TYPE(rel[i].r_info)) { -#define MUNGE(func) (*location = ((*location & ~func(-1)) | func(value))) +#ifdef __LITTLE_ENDIAN +# define MUNGE(func) \ + (*location = ((*location & ~func(-1)) | func(value))) +#else +/* + * Instructions are always little-endian, so when we read them as data, + * we have to swap them around before and after modifying them. + */ +# define MUNGE(func) \ + (*location = swab64((swab64(*location) & ~func(-1)) | func(value))) +#endif #ifndef __tilegx__ case R_TILE_32: diff --git a/arch/tile/kernel/single_step.c b/arch/tile/kernel/single_step.c index 89529c9f0605..27742e87e255 100644 --- a/arch/tile/kernel/single_step.c +++ b/arch/tile/kernel/single_step.c @@ -172,9 +172,6 @@ static tile_bundle_bits rewrite_load_store_unaligned( return (tilepro_bundle_bits) 0; } -#ifndef __LITTLE_ENDIAN -# error We assume little-endian representation with copy_xx_user size 2 here -#endif /* Handle unaligned load/store */ if (mem_op == MEMOP_LOAD || mem_op == MEMOP_LOAD_POSTINCR) { unsigned short val_16; @@ -195,8 +192,19 @@ static tile_bundle_bits rewrite_load_store_unaligned( state->update = 1; } } else { + unsigned short val_16; val = (val_reg == TREG_ZERO) ? 0 : regs->regs[val_reg]; - err = copy_to_user(addr, &val, size); + switch (size) { + case 2: + val_16 = val; + err = copy_to_user(addr, &val_16, sizeof(val_16)); + break; + case 4: + err = copy_to_user(addr, &val, sizeof(val)); + break; + default: + BUG(); + } } if (err) { diff --git a/arch/tile/lib/memchr_64.c b/arch/tile/lib/memchr_64.c index 84fdc8d8e735..6f867dbf7c56 100644 --- a/arch/tile/lib/memchr_64.c +++ b/arch/tile/lib/memchr_64.c @@ -15,6 +15,7 @@ #include <linux/types.h> #include <linux/string.h> #include <linux/module.h> +#include "string-endian.h" void *memchr(const void *s, int c, size_t n) { @@ -39,11 +40,8 @@ void *memchr(const void *s, int c, size_t n) /* Read the first word, but munge it so that bytes before the array * will not match goal. - * - * Note that this shift count expression works because we know - * shift counts are taken mod 64. */ - before_mask = (1ULL << (s_int << 3)) - 1; + before_mask = MASK(s_int); v = (*p | before_mask) ^ (goal & before_mask); /* Compute the address of the last byte. */ @@ -65,7 +63,7 @@ void *memchr(const void *s, int c, size_t n) /* We found a match, but it might be in a byte past the end * of the array. */ - ret = ((char *)p) + (__insn_ctz(bits) >> 3); + ret = ((char *)p) + (CFZ(bits) >> 3); return (ret <= last_byte_ptr) ? ret : NULL; } EXPORT_SYMBOL(memchr); diff --git a/arch/tile/lib/memcpy_64.c b/arch/tile/lib/memcpy_64.c index 3fab9a6a2bbe..c79b8e7c6828 100644 --- a/arch/tile/lib/memcpy_64.c +++ b/arch/tile/lib/memcpy_64.c @@ -15,7 +15,6 @@ #include <linux/types.h> #include <linux/string.h> #include <linux/module.h> -#define __memcpy memcpy /* EXPORT_SYMBOL() is in arch/tile/lib/exports.c since this should be asm. */ /* Must be 8 bytes in size. */ @@ -188,6 +187,7 @@ int USERCOPY_FUNC(void *__restrict dstv, const void *__restrict srcv, size_t n) /* n != 0 if we get here. Write out any trailing bytes. */ dst1 = (char *)dst8; +#ifndef __BIG_ENDIAN__ if (n & 4) { ST4((uint32_t *)dst1, final); dst1 += 4; @@ -202,11 +202,30 @@ int USERCOPY_FUNC(void *__restrict dstv, const void *__restrict srcv, size_t n) } if (n) ST1((uint8_t *)dst1, final); +#else + if (n & 4) { + ST4((uint32_t *)dst1, final >> 32); + dst1 += 4; + } + else + { + final >>= 32; + } + if (n & 2) { + ST2((uint16_t *)dst1, final >> 16); + dst1 += 2; + } + else + { + final >>= 16; + } + if (n & 1) + ST1((uint8_t *)dst1, final >> 8); +#endif return RETVAL; } - #ifdef USERCOPY_FUNC #undef ST1 #undef ST2 diff --git a/arch/tile/lib/strchr_64.c b/arch/tile/lib/strchr_64.c index 617a9273aaa8..f39f9dc422b0 100644 --- a/arch/tile/lib/strchr_64.c +++ b/arch/tile/lib/strchr_64.c @@ -15,8 +15,7 @@ #include <linux/types.h> #include <linux/string.h> #include <linux/module.h> - -#undef strchr +#include "string-endian.h" char *strchr(const char *s, int c) { @@ -33,13 +32,9 @@ char *strchr(const char *s, int c) * match neither zero nor goal (we make sure the high bit of each * byte is 1, and the low 7 bits are all the opposite of the goal * byte). - * - * Note that this shift count expression works because we know shift - * counts are taken mod 64. */ - const uint64_t before_mask = (1ULL << (s_int << 3)) - 1; - uint64_t v = (*p | before_mask) ^ - (goal & __insn_v1shrsi(before_mask, 1)); + const uint64_t before_mask = MASK(s_int); + uint64_t v = (*p | before_mask) ^ (goal & __insn_v1shrui(before_mask, 1)); uint64_t zero_matches, goal_matches; while (1) { @@ -55,8 +50,8 @@ char *strchr(const char *s, int c) v = *++p; } - z = __insn_ctz(zero_matches); - g = __insn_ctz(goal_matches); + z = CFZ(zero_matches); + g = CFZ(goal_matches); /* If we found c before '\0' we got a match. Note that if c == '\0' * then g == z, and we correctly return the address of the '\0' diff --git a/arch/tile/lib/string-endian.h b/arch/tile/lib/string-endian.h new file mode 100644 index 000000000000..c0eed7ce69c3 --- /dev/null +++ b/arch/tile/lib/string-endian.h @@ -0,0 +1,33 @@ +/* + * Copyright 2011 Tilera Corporation. All Rights Reserved. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation, version 2. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or + * NON INFRINGEMENT. See the GNU General Public License for + * more details. + * + * Provide a mask based on the pointer alignment that + * sets up non-zero bytes before the beginning of the string. + * The MASK expression works because shift counts are taken mod 64. + * Also, specify how to count "first" and "last" bits + * when the bits have been read as a word. + */ + +#include <asm/byteorder.h> + +#ifdef __LITTLE_ENDIAN +#define MASK(x) (__insn_shl(1ULL, (x << 3)) - 1) +#define NULMASK(x) ((2ULL << x) - 1) +#define CFZ(x) __insn_ctz(x) +#define REVCZ(x) __insn_clz(x) +#else +#define MASK(x) (__insn_shl(-2LL, ((-x << 3) - 1))) +#define NULMASK(x) (-2LL << (63 - x)) +#define CFZ(x) __insn_clz(x) +#define REVCZ(x) __insn_ctz(x) +#endif diff --git a/arch/tile/lib/strlen_64.c b/arch/tile/lib/strlen_64.c index 1c92d46202a8..9583fc3361fa 100644 --- a/arch/tile/lib/strlen_64.c +++ b/arch/tile/lib/strlen_64.c @@ -15,8 +15,7 @@ #include <linux/types.h> #include <linux/string.h> #include <linux/module.h> - -#undef strlen +#include "string-endian.h" size_t strlen(const char *s) { @@ -24,15 +23,13 @@ size_t strlen(const char *s) const uintptr_t s_int = (uintptr_t) s; const uint64_t *p = (const uint64_t *)(s_int & -8); - /* Read the first word, but force bytes before the string to be nonzero. - * This expression works because we know shift counts are taken mod 64. - */ - uint64_t v = *p | ((1ULL << (s_int << 3)) - 1); + /* Read and MASK the first word. */ + uint64_t v = *p | MASK(s_int); uint64_t bits; while ((bits = __insn_v1cmpeqi(v, 0)) == 0) v = *++p; - return ((const char *)p) + (__insn_ctz(bits) >> 3) - s; + return ((const char *)p) + (CFZ(bits) >> 3) - s; } EXPORT_SYMBOL(strlen); |