diff options
Diffstat (limited to 'arch/hexagon/include')
| -rw-r--r-- | arch/hexagon/include/asm/atomic.h | 1 | ||||
| -rw-r--r-- | arch/hexagon/include/asm/barrier.h | 41 | ||||
| -rw-r--r-- | arch/hexagon/include/asm/bitops.h | 1 | ||||
| -rw-r--r-- | arch/hexagon/include/asm/cmpxchg.h | 90 | ||||
| -rw-r--r-- | arch/hexagon/include/asm/exec.h | 28 | ||||
| -rw-r--r-- | arch/hexagon/include/asm/switch_to.h | 34 | ||||
| -rw-r--r-- | arch/hexagon/include/asm/system.h | 131 |
7 files changed, 199 insertions, 127 deletions
diff --git a/arch/hexagon/include/asm/atomic.h b/arch/hexagon/include/asm/atomic.h index e220f9053035..3e258043337b 100644 --- a/arch/hexagon/include/asm/atomic.h +++ b/arch/hexagon/include/asm/atomic.h @@ -23,6 +23,7 @@ #define _ASM_ATOMIC_H #include <linux/types.h> +#include <asm/cmpxchg.h> #define ATOMIC_INIT(i) { (i) } #define atomic_set(v, i) ((v)->counter = (i)) diff --git a/arch/hexagon/include/asm/barrier.h b/arch/hexagon/include/asm/barrier.h new file mode 100644 index 000000000000..a4ed6e26cb1d --- /dev/null +++ b/arch/hexagon/include/asm/barrier.h @@ -0,0 +1,41 @@ +/* + * Memory barrier definitions for the Hexagon architecture + * + * Copyright (c) 2010-2011, Code Aurora Forum. 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 version 2 and + * only version 2 as published by the Free Software Foundation. + * + * 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. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA + * 02110-1301, USA. + */ + +#ifndef _ASM_BARRIER_H +#define _ASM_BARRIER_H + +#define rmb() barrier() +#define read_barrier_depends() barrier() +#define wmb() barrier() +#define mb() barrier() +#define smp_rmb() barrier() +#define smp_read_barrier_depends() barrier() +#define smp_wmb() barrier() +#define smp_mb() barrier() +#define smp_mb__before_atomic_dec() barrier() +#define smp_mb__after_atomic_dec() barrier() +#define smp_mb__before_atomic_inc() barrier() +#define smp_mb__after_atomic_inc() barrier() + +/* Set a value and use a memory barrier. Used by the scheduler somewhere. */ +#define set_mb(var, value) \ + do { var = value; mb(); } while (0) + +#endif /* _ASM_BARRIER_H */ diff --git a/arch/hexagon/include/asm/bitops.h b/arch/hexagon/include/asm/bitops.h index d23461e080ff..4caa649ad78b 100644 --- a/arch/hexagon/include/asm/bitops.h +++ b/arch/hexagon/include/asm/bitops.h @@ -24,7 +24,6 @@ #include <linux/compiler.h> #include <asm/byteorder.h> -#include <asm/system.h> #include <asm/atomic.h> #ifdef __KERNEL__ diff --git a/arch/hexagon/include/asm/cmpxchg.h b/arch/hexagon/include/asm/cmpxchg.h new file mode 100644 index 000000000000..c5f9527e1df6 --- /dev/null +++ b/arch/hexagon/include/asm/cmpxchg.h @@ -0,0 +1,90 @@ +/* + * xchg/cmpxchg operations for the Hexagon architecture + * + * Copyright (c) 2010-2011, Code Aurora Forum. 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 version 2 and + * only version 2 as published by the Free Software Foundation. + * + * 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. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA + * 02110-1301, USA. + */ + +#ifndef _ASM_CMPXCHG_H +#define _ASM_CMPXCHG_H + +/* + * __xchg - atomically exchange a register and a memory location + * @x: value to swap + * @ptr: pointer to memory + * @size: size of the value + * + * Only 4 bytes supported currently. + * + * Note: there was an errata for V2 about .new's and memw_locked. + * + */ +static inline unsigned long __xchg(unsigned long x, volatile void *ptr, + int size) +{ + unsigned long retval; + + /* Can't seem to use printk or panic here, so just stop */ + if (size != 4) do { asm volatile("brkpt;\n"); } while (1); + + __asm__ __volatile__ ( + "1: %0 = memw_locked(%1);\n" /* load into retval */ + " memw_locked(%1,P0) = %2;\n" /* store into memory */ + " if !P0 jump 1b;\n" + : "=&r" (retval) + : "r" (ptr), "r" (x) + : "memory", "p0" + ); + return retval; +} + +/* + * Atomically swap the contents of a register with memory. Should be atomic + * between multiple CPU's and within interrupts on the same CPU. + */ +#define xchg(ptr, v) ((__typeof__(*(ptr)))__xchg((unsigned long)(v), (ptr), \ + sizeof(*(ptr)))) + +/* + * see rt-mutex-design.txt; cmpxchg supposedly checks if *ptr == A and swaps. + * looks just like atomic_cmpxchg on our arch currently with a bunch of + * variable casting. + */ +#define __HAVE_ARCH_CMPXCHG 1 + +#define cmpxchg(ptr, old, new) \ +({ \ + __typeof__(ptr) __ptr = (ptr); \ + __typeof__(*(ptr)) __old = (old); \ + __typeof__(*(ptr)) __new = (new); \ + __typeof__(*(ptr)) __oldval = 0; \ + \ + asm volatile( \ + "1: %0 = memw_locked(%1);\n" \ + " { P0 = cmp.eq(%0,%2);\n" \ + " if (!P0.new) jump:nt 2f; }\n" \ + " memw_locked(%1,p0) = %3;\n" \ + " if (!P0) jump 1b;\n" \ + "2:\n" \ + : "=&r" (__oldval) \ + : "r" (__ptr), "r" (__old), "r" (__new) \ + : "memory", "p0" \ + ); \ + __oldval; \ +}) + +#endif /* _ASM_CMPXCHG_H */ diff --git a/arch/hexagon/include/asm/exec.h b/arch/hexagon/include/asm/exec.h new file mode 100644 index 000000000000..350e6d497d44 --- /dev/null +++ b/arch/hexagon/include/asm/exec.h @@ -0,0 +1,28 @@ +/* + * Process execution related definitions for the Hexagon architecture + * + * Copyright (c) 2010-2011, Code Aurora Forum. 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 version 2 and + * only version 2 as published by the Free Software Foundation. + * + * 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. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA + * 02110-1301, USA. + */ + +#ifndef _ASM_EXEC_H +#define _ASM_EXEC_H + +/* Should probably shoot for an 8-byte aligned stack pointer */ +#define STACK_MASK (~7) +#define arch_align_stack(x) (x & STACK_MASK) + +#endif /* _ASM_EXEC_H */ diff --git a/arch/hexagon/include/asm/switch_to.h b/arch/hexagon/include/asm/switch_to.h new file mode 100644 index 000000000000..28ca0dfb6064 --- /dev/null +++ b/arch/hexagon/include/asm/switch_to.h @@ -0,0 +1,34 @@ +/* + * Task switching definitions for the Hexagon architecture + * + * Copyright (c) 2010-2011, Code Aurora Forum. 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 version 2 and + * only version 2 as published by the Free Software Foundation. + * + * 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. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA + * 02110-1301, USA. + */ + +#ifndef _ASM_SWITCH_TO_H +#define _ASM_SWITCH_TO_H + +struct thread_struct; + +extern struct task_struct *__switch_to(struct task_struct *, + struct task_struct *, + struct task_struct *); + +#define switch_to(p, n, r) do {\ + r = __switch_to((p), (n), (r));\ +} while (0) + +#endif /* _ASM_SWITCH_TO_H */ diff --git a/arch/hexagon/include/asm/system.h b/arch/hexagon/include/asm/system.h index 323ed1dd65e2..a7f40578587c 100644 --- a/arch/hexagon/include/asm/system.h +++ b/arch/hexagon/include/asm/system.h @@ -1,126 +1,5 @@ -/* - * System level definitions for the Hexagon architecture - * - * Copyright (c) 2010-2011, Code Aurora Forum. 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 version 2 and - * only version 2 as published by the Free Software Foundation. - * - * 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. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301, USA. - */ - -#ifndef _ASM_SYSTEM_H -#define _ASM_SYSTEM_H - -#include <linux/linkage.h> -#include <linux/irqflags.h> -#include <asm/atomic.h> -#include <asm/hexagon_vm.h> - -struct thread_struct; - -extern struct task_struct *__switch_to(struct task_struct *, - struct task_struct *, - struct task_struct *); - -#define switch_to(p, n, r) do {\ - r = __switch_to((p), (n), (r));\ -} while (0) - - -#define rmb() barrier() -#define read_barrier_depends() barrier() -#define wmb() barrier() -#define mb() barrier() -#define smp_rmb() barrier() -#define smp_read_barrier_depends() barrier() -#define smp_wmb() barrier() -#define smp_mb() barrier() -#define smp_mb__before_atomic_dec() barrier() -#define smp_mb__after_atomic_dec() barrier() -#define smp_mb__before_atomic_inc() barrier() -#define smp_mb__after_atomic_inc() barrier() - -/* - * __xchg - atomically exchange a register and a memory location - * @x: value to swap - * @ptr: pointer to memory - * @size: size of the value - * - * Only 4 bytes supported currently. - * - * Note: there was an errata for V2 about .new's and memw_locked. - * - */ -static inline unsigned long __xchg(unsigned long x, volatile void *ptr, - int size) -{ - unsigned long retval; - - /* Can't seem to use printk or panic here, so just stop */ - if (size != 4) do { asm volatile("brkpt;\n"); } while (1); - - __asm__ __volatile__ ( - "1: %0 = memw_locked(%1);\n" /* load into retval */ - " memw_locked(%1,P0) = %2;\n" /* store into memory */ - " if !P0 jump 1b;\n" - : "=&r" (retval) - : "r" (ptr), "r" (x) - : "memory", "p0" - ); - return retval; -} - -/* - * Atomically swap the contents of a register with memory. Should be atomic - * between multiple CPU's and within interrupts on the same CPU. - */ -#define xchg(ptr, v) ((__typeof__(*(ptr)))__xchg((unsigned long)(v), (ptr), \ - sizeof(*(ptr)))) - -/* Set a value and use a memory barrier. Used by the scheduler somewhere. */ -#define set_mb(var, value) \ - do { var = value; mb(); } while (0) - -/* - * see rt-mutex-design.txt; cmpxchg supposedly checks if *ptr == A and swaps. - * looks just like atomic_cmpxchg on our arch currently with a bunch of - * variable casting. - */ -#define __HAVE_ARCH_CMPXCHG 1 - -#define cmpxchg(ptr, old, new) \ -({ \ - __typeof__(ptr) __ptr = (ptr); \ - __typeof__(*(ptr)) __old = (old); \ - __typeof__(*(ptr)) __new = (new); \ - __typeof__(*(ptr)) __oldval = 0; \ - \ - asm volatile( \ - "1: %0 = memw_locked(%1);\n" \ - " { P0 = cmp.eq(%0,%2);\n" \ - " if (!P0.new) jump:nt 2f; }\n" \ - " memw_locked(%1,p0) = %3;\n" \ - " if (!P0) jump 1b;\n" \ - "2:\n" \ - : "=&r" (__oldval) \ - : "r" (__ptr), "r" (__old), "r" (__new) \ - : "memory", "p0" \ - ); \ - __oldval; \ -}) - -/* Should probably shoot for an 8-byte aligned stack pointer */ -#define STACK_MASK (~7) -#define arch_align_stack(x) (x & STACK_MASK) - -#endif +/* FILE TO BE DELETED. DO NOT ADD STUFF HERE! */ +#include <asm/barrier.h> +#include <asm/cmpxchg.h> +#include <asm/exec.h> +#include <asm/switch_to.h> |