-#ifndef __SPARC_SYSTEM_H
-#define __SPARC_SYSTEM_H
-
-#include <linux/kernel.h>
-#include <linux/threads.h> /* NR_CPUS */
-#include <linux/thread_info.h>
-
-#include <asm/page.h>
-#include <asm/psr.h>
-#include <asm/ptrace.h>
-#include <asm/btfixup.h>
-#include <asm/smp.h>
-
-#ifndef __ASSEMBLY__
-
-#include <linux/irqflags.h>
-
-/*
- * Sparc (general) CPU types
- */
-enum sparc_cpu {
- sun4 = 0x00,
- sun4c = 0x01,
- sun4m = 0x02,
- sun4d = 0x03,
- sun4e = 0x04,
- sun4u = 0x05, /* V8 ploos ploos */
- sun_unknown = 0x06,
- ap1000 = 0x07, /* almost a sun4m */
-};
-
-/* Really, userland should not be looking at any of this... */
-#ifdef __KERNEL__
-
-extern enum sparc_cpu sparc_cpu_model;
-
-#ifndef CONFIG_SUN4
-#define ARCH_SUN4C_SUN4 (sparc_cpu_model==sun4c)
-#define ARCH_SUN4 0
+#ifndef ___ASM_SPARC_SYSTEM_H
+#define ___ASM_SPARC_SYSTEM_H
+#if defined(__sparc__) && defined(__arch64__)
+#include <asm-sparc/system_64.h>
#else
-#define ARCH_SUN4C_SUN4 1
-#define ARCH_SUN4 1
+#include <asm-sparc/system_32.h>
#endif
-
-#define SUN4M_NCPUS 4 /* Architectural limit of sun4m. */
-
-extern char reboot_command[];
-
-extern struct thread_info *current_set[NR_CPUS];
-
-extern unsigned long empty_bad_page;
-extern unsigned long empty_bad_page_table;
-extern unsigned long empty_zero_page;
-
-extern void sun_do_break(void);
-extern int serial_console;
-extern int stop_a_enabled;
-
-static inline int con_is_present(void)
-{
- return serial_console ? 0 : 1;
-}
-
-/* When a context switch happens we must flush all user windows so that
- * the windows of the current process are flushed onto its stack. This
- * way the windows are all clean for the next process and the stack
- * frames are up to date.
- */
-extern void flush_user_windows(void);
-extern void kill_user_windows(void);
-extern void synchronize_user_stack(void);
-extern void fpsave(unsigned long *fpregs, unsigned long *fsr,
- void *fpqueue, unsigned long *fpqdepth);
-
-#ifdef CONFIG_SMP
-#define SWITCH_ENTER(prv) \
- do { \
- if (test_tsk_thread_flag(prv, TIF_USEDFPU)) { \
- put_psr(get_psr() | PSR_EF); \
- fpsave(&(prv)->thread.float_regs[0], &(prv)->thread.fsr, \
- &(prv)->thread.fpqueue[0], &(prv)->thread.fpqdepth); \
- clear_tsk_thread_flag(prv, TIF_USEDFPU); \
- (prv)->thread.kregs->psr &= ~PSR_EF; \
- } \
- } while(0)
-
-#define SWITCH_DO_LAZY_FPU(next) /* */
-#else
-#define SWITCH_ENTER(prv) /* */
-#define SWITCH_DO_LAZY_FPU(nxt) \
- do { \
- if (last_task_used_math != (nxt)) \
- (nxt)->thread.kregs->psr&=~PSR_EF; \
- } while(0)
-#endif
-
-extern void flushw_all(void);
-
-/*
- * Flush windows so that the VM switch which follows
- * would not pull the stack from under us.
- *
- * SWITCH_ENTER and SWITH_DO_LAZY_FPU do not work yet (e.g. SMP does not work)
- * XXX WTF is the above comment? Found in late teen 2.4.x.
- */
-#define prepare_arch_switch(next) do { \
- __asm__ __volatile__( \
- ".globl\tflush_patch_switch\nflush_patch_switch:\n\t" \
- "save %sp, -0x40, %sp; save %sp, -0x40, %sp; save %sp, -0x40, %sp\n\t" \
- "save %sp, -0x40, %sp; save %sp, -0x40, %sp; save %sp, -0x40, %sp\n\t" \
- "save %sp, -0x40, %sp\n\t" \
- "restore; restore; restore; restore; restore; restore; restore"); \
-} while(0)
-
- /* Much care has gone into this code, do not touch it.
- *
- * We need to loadup regs l0/l1 for the newly forked child
- * case because the trap return path relies on those registers
- * holding certain values, gcc is told that they are clobbered.
- * Gcc needs registers for 3 values in and 1 value out, so we
- * clobber every non-fixed-usage register besides l2/l3/o4/o5. -DaveM
- *
- * Hey Dave, that do not touch sign is too much of an incentive
- * - Anton & Pete
- */
-#define switch_to(prev, next, last) do { \
- SWITCH_ENTER(prev); \
- SWITCH_DO_LAZY_FPU(next); \
- cpu_set(smp_processor_id(), next->active_mm->cpu_vm_mask); \
- __asm__ __volatile__( \
- "sethi %%hi(here - 0x8), %%o7\n\t" \
- "mov %%g6, %%g3\n\t" \
- "or %%o7, %%lo(here - 0x8), %%o7\n\t" \
- "rd %%psr, %%g4\n\t" \
- "std %%sp, [%%g6 + %4]\n\t" \
- "rd %%wim, %%g5\n\t" \
- "wr %%g4, 0x20, %%psr\n\t" \
- "nop\n\t" \
- "std %%g4, [%%g6 + %3]\n\t" \
- "ldd [%2 + %3], %%g4\n\t" \
- "mov %2, %%g6\n\t" \
- ".globl patchme_store_new_current\n" \
-"patchme_store_new_current:\n\t" \
- "st %2, [%1]\n\t" \
- "wr %%g4, 0x20, %%psr\n\t" \
- "nop\n\t" \
- "nop\n\t" \
- "nop\n\t" /* LEON needs all 3 nops: load to %sp depends on CWP. */ \
- "ldd [%%g6 + %4], %%sp\n\t" \
- "wr %%g5, 0x0, %%wim\n\t" \
- "ldd [%%sp + 0x00], %%l0\n\t" \
- "ldd [%%sp + 0x38], %%i6\n\t" \
- "wr %%g4, 0x0, %%psr\n\t" \
- "nop\n\t" \
- "nop\n\t" \
- "jmpl %%o7 + 0x8, %%g0\n\t" \
- " ld [%%g3 + %5], %0\n\t" \
- "here:\n" \
- : "=&r" (last) \
- : "r" (&(current_set[hard_smp_processor_id()])), \
- "r" (task_thread_info(next)), \
- "i" (TI_KPSR), \
- "i" (TI_KSP), \
- "i" (TI_TASK) \
- : "g1", "g2", "g3", "g4", "g5", "g7", \
- "l0", "l1", "l3", "l4", "l5", "l6", "l7", \
- "i0", "i1", "i2", "i3", "i4", "i5", \
- "o0", "o1", "o2", "o3", "o7"); \
- } while(0)
-
-/* XXX Change this if we ever use a PSO mode kernel. */
-#define mb() __asm__ __volatile__ ("" : : : "memory")
-#define rmb() mb()
-#define wmb() mb()
-#define read_barrier_depends() do { } while(0)
-#define set_mb(__var, __value) do { __var = __value; mb(); } while(0)
-#define smp_mb() __asm__ __volatile__("":::"memory")
-#define smp_rmb() __asm__ __volatile__("":::"memory")
-#define smp_wmb() __asm__ __volatile__("":::"memory")
-#define smp_read_barrier_depends() do { } while(0)
-
-#define nop() __asm__ __volatile__ ("nop")
-
-/* This has special calling conventions */
-#ifndef CONFIG_SMP
-BTFIXUPDEF_CALL(void, ___xchg32, void)
-#endif
-
-static inline unsigned long xchg_u32(__volatile__ unsigned long *m, unsigned long val)
-{
-#ifdef CONFIG_SMP
- __asm__ __volatile__("swap [%2], %0"
- : "=&r" (val)
- : "0" (val), "r" (m)
- : "memory");
- return val;
-#else
- register unsigned long *ptr asm("g1");
- register unsigned long ret asm("g2");
-
- ptr = (unsigned long *) m;
- ret = val;
-
- /* Note: this is magic and the nop there is
- really needed. */
- __asm__ __volatile__(
- "mov %%o7, %%g4\n\t"
- "call ___f____xchg32\n\t"
- " nop\n\t"
- : "=&r" (ret)
- : "0" (ret), "r" (ptr)
- : "g3", "g4", "g7", "memory", "cc");
-
- return ret;
#endif
-}
-
-#define xchg(ptr,x) ((__typeof__(*(ptr)))__xchg((unsigned long)(x),(ptr),sizeof(*(ptr))))
-
-extern void __xchg_called_with_bad_pointer(void);
-
-static inline unsigned long __xchg(unsigned long x, __volatile__ void * ptr, int size)
-{
- switch (size) {
- case 4:
- return xchg_u32(ptr, x);
- };
- __xchg_called_with_bad_pointer();
- return x;
-}
-
-/* Emulate cmpxchg() the same way we emulate atomics,
- * by hashing the object address and indexing into an array
- * of spinlocks to get a bit of performance...
- *
- * See arch/sparc/lib/atomic32.c for implementation.
- *
- * Cribbed from <asm-parisc/atomic.h>
- */
-#define __HAVE_ARCH_CMPXCHG 1
-
-/* bug catcher for when unsupported size is used - won't link */
-extern void __cmpxchg_called_with_bad_pointer(void);
-/* we only need to support cmpxchg of a u32 on sparc */
-extern unsigned long __cmpxchg_u32(volatile u32 *m, u32 old, u32 new_);
-
-/* don't worry...optimizer will get rid of most of this */
-static inline unsigned long
-__cmpxchg(volatile void *ptr, unsigned long old, unsigned long new_, int size)
-{
- switch (size) {
- case 4:
- return __cmpxchg_u32((u32 *)ptr, (u32)old, (u32)new_);
- default:
- __cmpxchg_called_with_bad_pointer();
- break;
- }
- return old;
-}
-
-#define cmpxchg(ptr, o, n) \
-({ \
- __typeof__(*(ptr)) _o_ = (o); \
- __typeof__(*(ptr)) _n_ = (n); \
- (__typeof__(*(ptr))) __cmpxchg((ptr), (unsigned long)_o_, \
- (unsigned long)_n_, sizeof(*(ptr))); \
-})
-
-#include <asm-generic/cmpxchg-local.h>
-
-/*
- * cmpxchg_local and cmpxchg64_local are atomic wrt current CPU. Always make
- * them available.
- */
-#define cmpxchg_local(ptr, o, n) \
- ((__typeof__(*(ptr)))__cmpxchg_local_generic((ptr), (unsigned long)(o),\
- (unsigned long)(n), sizeof(*(ptr))))
-#define cmpxchg64_local(ptr, o, n) __cmpxchg64_local_generic((ptr), (o), (n))
-
-extern void die_if_kernel(char *str, struct pt_regs *regs) __attribute__ ((noreturn));
-
-#endif /* __KERNEL__ */
-
-#endif /* __ASSEMBLY__ */
-
-#define arch_align_stack(x) (x)
-
-#endif /* !(__SPARC_SYSTEM_H) */
projects / linux-2.6-omap-h63xx.git / blobdiff