diff options
Diffstat (limited to 'arch/parisc/include/asm/system.h')
| -rw-r--r-- | arch/parisc/include/asm/system.h | 171 |
1 files changed, 6 insertions, 165 deletions
diff --git a/arch/parisc/include/asm/system.h b/arch/parisc/include/asm/system.h index b19e63a8e84..fc2c1261ac1 100644 --- a/arch/parisc/include/asm/system.h +++ b/arch/parisc/include/asm/system.h @@ -1,165 +1,6 @@ -#ifndef __PARISC_SYSTEM_H -#define __PARISC_SYSTEM_H - -#include <linux/irqflags.h> - -/* The program status word as bitfields. */ -struct pa_psw { - unsigned int y:1; - unsigned int z:1; - unsigned int rv:2; - unsigned int w:1; - unsigned int e:1; - unsigned int s:1; - unsigned int t:1; - - unsigned int h:1; - unsigned int l:1; - unsigned int n:1; - unsigned int x:1; - unsigned int b:1; - unsigned int c:1; - unsigned int v:1; - unsigned int m:1; - - unsigned int cb:8; - - unsigned int o:1; - unsigned int g:1; - unsigned int f:1; - unsigned int r:1; - unsigned int q:1; - unsigned int p:1; - unsigned int d:1; - unsigned int i:1; -}; - -#ifdef CONFIG_64BIT -#define pa_psw(task) ((struct pa_psw *) ((char *) (task) + TASK_PT_PSW + 4)) -#else -#define pa_psw(task) ((struct pa_psw *) ((char *) (task) + TASK_PT_PSW)) -#endif - -struct task_struct; - -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 mfctl(reg) ({ \ - unsigned long cr; \ - __asm__ __volatile__( \ - "mfctl " #reg ",%0" : \ - "=r" (cr) \ - ); \ - cr; \ -}) - -#define mtctl(gr, cr) \ - __asm__ __volatile__("mtctl %0,%1" \ - : /* no outputs */ \ - : "r" (gr), "i" (cr) : "memory") - -/* these are here to de-mystefy the calling code, and to provide hooks */ -/* which I needed for debugging EIEM problems -PB */ -#define get_eiem() mfctl(15) -static inline void set_eiem(unsigned long val) -{ - mtctl(val, 15); -} - -#define mfsp(reg) ({ \ - unsigned long cr; \ - __asm__ __volatile__( \ - "mfsp " #reg ",%0" : \ - "=r" (cr) \ - ); \ - cr; \ -}) - -#define mtsp(gr, cr) \ - __asm__ __volatile__("mtsp %0,%1" \ - : /* no outputs */ \ - : "r" (gr), "i" (cr) : "memory") - - -/* -** This is simply the barrier() macro from linux/kernel.h but when serial.c -** uses tqueue.h uses smp_mb() defined using barrier(), linux/kernel.h -** hasn't yet been included yet so it fails, thus repeating the macro here. -** -** PA-RISC architecture allows for weakly ordered memory accesses although -** none of the processors use it. There is a strong ordered bit that is -** set in the O-bit of the page directory entry. Operating systems that -** can not tolerate out of order accesses should set this bit when mapping -** pages. The O-bit of the PSW should also be set to 1 (I don't believe any -** of the processor implemented the PSW O-bit). The PCX-W ERS states that -** the TLB O-bit is not implemented so the page directory does not need to -** have the O-bit set when mapping pages (section 3.1). This section also -** states that the PSW Y, Z, G, and O bits are not implemented. -** So it looks like nothing needs to be done for parisc-linux (yet). -** (thanks to chada for the above comment -ggg) -** -** The __asm__ op below simple prevents gcc/ld from reordering -** instructions across the mb() "call". -*/ -#define mb() __asm__ __volatile__("":::"memory") /* barrier() */ -#define rmb() mb() -#define wmb() mb() -#define smp_mb() mb() -#define smp_rmb() mb() -#define smp_wmb() mb() -#define smp_read_barrier_depends() do { } while(0) -#define read_barrier_depends() do { } while(0) - -#define set_mb(var, value) do { var = value; mb(); } while (0) - -#ifndef CONFIG_PA20 -/* Because kmalloc only guarantees 8-byte alignment for kmalloc'd data, - and GCC only guarantees 8-byte alignment for stack locals, we can't - be assured of 16-byte alignment for atomic lock data even if we - specify "__attribute ((aligned(16)))" in the type declaration. So, - we use a struct containing an array of four ints for the atomic lock - type and dynamically select the 16-byte aligned int from the array - for the semaphore. */ - -#define __PA_LDCW_ALIGNMENT 16 -#define __ldcw_align(a) ({ \ - unsigned long __ret = (unsigned long) &(a)->lock[0]; \ - __ret = (__ret + __PA_LDCW_ALIGNMENT - 1) \ - & ~(__PA_LDCW_ALIGNMENT - 1); \ - (volatile unsigned int *) __ret; \ -}) -#define __LDCW "ldcw" - -#else /*CONFIG_PA20*/ -/* From: "Jim Hull" <jim.hull of hp.com> - I've attached a summary of the change, but basically, for PA 2.0, as - long as the ",CO" (coherent operation) completer is specified, then the - 16-byte alignment requirement for ldcw and ldcd is relaxed, and instead - they only require "natural" alignment (4-byte for ldcw, 8-byte for - ldcd). */ - -#define __PA_LDCW_ALIGNMENT 4 -#define __ldcw_align(a) (&(a)->slock) -#define __LDCW "ldcw,co" - -#endif /*!CONFIG_PA20*/ - -/* LDCW, the only atomic read-write operation PA-RISC has. *sigh*. */ -#define __ldcw(a) ({ \ - unsigned __ret; \ - __asm__ __volatile__(__LDCW " 0(%2),%0" \ - : "=r" (__ret), "+m" (*(a)) : "r" (a)); \ - __ret; \ -}) - -#ifdef CONFIG_SMP -# define __lock_aligned __attribute__((__section__(".data..lock_aligned"))) -#endif - -#define arch_align_stack(x) (x) - -#endif +/* FILE TO BE DELETED. DO NOT ADD STUFF HERE! */ +#include <asm/barrier.h> +#include <asm/exec.h> +#include <asm/ldcw.h> +#include <asm/special_insns.h> +#include <asm/switch_to.h> |