diff options
Diffstat (limited to 'arch/sparc/include/asm')
36 files changed, 645 insertions, 640 deletions
diff --git a/arch/sparc/include/asm/atomic_32.h b/arch/sparc/include/asm/atomic_32.h index 9dd0a769fa18..905832aa9e9e 100644 --- a/arch/sparc/include/asm/atomic_32.h +++ b/arch/sparc/include/asm/atomic_32.h @@ -13,9 +13,9 @@ #include <linux/types.h> +#include <asm/cmpxchg.h> #include <asm-generic/atomic64.h> -#include <asm/system.h> #define ATOMIC_INIT(i) { (i) } diff --git a/arch/sparc/include/asm/atomic_64.h b/arch/sparc/include/asm/atomic_64.h index 9f421df46aec..ce35a1cf1a20 100644 --- a/arch/sparc/include/asm/atomic_64.h +++ b/arch/sparc/include/asm/atomic_64.h @@ -8,7 +8,7 @@ #define __ARCH_SPARC64_ATOMIC__ #include <linux/types.h> -#include <asm/system.h> +#include <asm/cmpxchg.h> #define ATOMIC_INIT(i) { (i) } #define ATOMIC64_INIT(i) { (i) } @@ -85,7 +85,6 @@ static inline int __atomic_add_unless(atomic_t *v, int a, int u) return c; } - #define atomic64_cmpxchg(v, o, n) \ ((__typeof__((v)->counter))cmpxchg(&((v)->counter), (o), (n))) #define atomic64_xchg(v, new) (xchg(&((v)->counter), new)) diff --git a/arch/sparc/include/asm/auxio_32.h b/arch/sparc/include/asm/auxio_32.h index e03e088be95f..3a319775ae37 100644 --- a/arch/sparc/include/asm/auxio_32.h +++ b/arch/sparc/include/asm/auxio_32.h @@ -6,7 +6,6 @@ #ifndef _SPARC_AUXIO_H #define _SPARC_AUXIO_H -#include <asm/system.h> #include <asm/vaddrs.h> /* This register is an unsigned char in IO space. It does two things. diff --git a/arch/sparc/include/asm/barrier.h b/arch/sparc/include/asm/barrier.h new file mode 100644 index 000000000000..b25f02a029e0 --- /dev/null +++ b/arch/sparc/include/asm/barrier.h @@ -0,0 +1,8 @@ +#ifndef ___ASM_SPARC_BARRIER_H +#define ___ASM_SPARC_BARRIER_H +#if defined(__sparc__) && defined(__arch64__) +#include <asm/barrier_64.h> +#else +#include <asm/barrier_32.h> +#endif +#endif diff --git a/arch/sparc/include/asm/barrier_32.h b/arch/sparc/include/asm/barrier_32.h new file mode 100644 index 000000000000..c1b76654ee76 --- /dev/null +++ b/arch/sparc/include/asm/barrier_32.h @@ -0,0 +1,15 @@ +#ifndef __SPARC_BARRIER_H +#define __SPARC_BARRIER_H + +/* 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) + +#endif /* !(__SPARC_BARRIER_H) */ diff --git a/arch/sparc/include/asm/barrier_64.h b/arch/sparc/include/asm/barrier_64.h new file mode 100644 index 000000000000..95d45986f908 --- /dev/null +++ b/arch/sparc/include/asm/barrier_64.h @@ -0,0 +1,56 @@ +#ifndef __SPARC64_BARRIER_H +#define __SPARC64_BARRIER_H + +/* These are here in an effort to more fully work around Spitfire Errata + * #51. Essentially, if a memory barrier occurs soon after a mispredicted + * branch, the chip can stop executing instructions until a trap occurs. + * Therefore, if interrupts are disabled, the chip can hang forever. + * + * It used to be believed that the memory barrier had to be right in the + * delay slot, but a case has been traced recently wherein the memory barrier + * was one instruction after the branch delay slot and the chip still hung. + * The offending sequence was the following in sym_wakeup_done() of the + * sym53c8xx_2 driver: + * + * call sym_ccb_from_dsa, 0 + * movge %icc, 0, %l0 + * brz,pn %o0, .LL1303 + * mov %o0, %l2 + * membar #LoadLoad + * + * The branch has to be mispredicted for the bug to occur. Therefore, we put + * the memory barrier explicitly into a "branch always, predicted taken" + * delay slot to avoid the problem case. + */ +#define membar_safe(type) \ +do { __asm__ __volatile__("ba,pt %%xcc, 1f\n\t" \ + " membar " type "\n" \ + "1:\n" \ + : : : "memory"); \ +} while (0) + +/* The kernel always executes in TSO memory model these days, + * and furthermore most sparc64 chips implement more stringent + * memory ordering than required by the specifications. + */ +#define mb() membar_safe("#StoreLoad") +#define rmb() __asm__ __volatile__("":::"memory") +#define wmb() __asm__ __volatile__("":::"memory") + +#define read_barrier_depends() do { } while(0) +#define set_mb(__var, __value) \ + do { __var = __value; membar_safe("#StoreLoad"); } while(0) + +#ifdef CONFIG_SMP +#define smp_mb() mb() +#define smp_rmb() rmb() +#define smp_wmb() wmb() +#else +#define smp_mb() __asm__ __volatile__("":::"memory") +#define smp_rmb() __asm__ __volatile__("":::"memory") +#define smp_wmb() __asm__ __volatile__("":::"memory") +#endif + +#define smp_read_barrier_depends() do { } while(0) + +#endif /* !(__SPARC64_BARRIER_H) */ diff --git a/arch/sparc/include/asm/bug.h b/arch/sparc/include/asm/bug.h index 8a59e5a8c217..6bd9f43cb5a5 100644 --- a/arch/sparc/include/asm/bug.h +++ b/arch/sparc/include/asm/bug.h @@ -19,4 +19,7 @@ extern void do_BUG(const char *file, int line); #include <asm-generic/bug.h> +struct pt_regs; +extern void die_if_kernel(char *str, struct pt_regs *regs) __attribute__ ((noreturn)); + #endif diff --git a/arch/sparc/include/asm/cacheflush_32.h b/arch/sparc/include/asm/cacheflush_32.h index 2e468773f250..68431b47a22a 100644 --- a/arch/sparc/include/asm/cacheflush_32.h +++ b/arch/sparc/include/asm/cacheflush_32.h @@ -83,4 +83,13 @@ extern void sparc_flush_page_to_ram(struct page *page); #define flush_cache_vmap(start, end) flush_cache_all() #define flush_cache_vunmap(start, end) flush_cache_all() +/* 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 flushw_all(void); + #endif /* _SPARC_CACHEFLUSH_H */ diff --git a/arch/sparc/include/asm/cacheflush_64.h b/arch/sparc/include/asm/cacheflush_64.h index b95384033e89..2efea2ff88b7 100644 --- a/arch/sparc/include/asm/cacheflush_64.h +++ b/arch/sparc/include/asm/cacheflush_64.h @@ -9,6 +9,16 @@ /* Cache flush operations. */ + +#define flushi(addr) __asm__ __volatile__ ("flush %0" : : "r" (addr) : "memory") +#define flushw_all() __asm__ __volatile__("flushw") + +extern void __flushw_user(void); +#define flushw_user() __flushw_user() + +#define flush_user_windows flushw_user +#define flush_register_windows flushw_all + /* These are the same regardless of whether this is an SMP kernel or not. */ #define flush_cache_mm(__mm) \ do { if ((__mm) == current->mm) flushw_user(); } while(0) diff --git a/arch/sparc/include/asm/cmpxchg.h b/arch/sparc/include/asm/cmpxchg.h new file mode 100644 index 000000000000..9355893efa52 --- /dev/null +++ b/arch/sparc/include/asm/cmpxchg.h @@ -0,0 +1,8 @@ +#ifndef ___ASM_SPARC_CMPXCHG_H +#define ___ASM_SPARC_CMPXCHG_H +#if defined(__sparc__) && defined(__arch64__) +#include <asm/cmpxchg_64.h> +#else +#include <asm/cmpxchg_32.h> +#endif +#endif diff --git a/arch/sparc/include/asm/cmpxchg_32.h b/arch/sparc/include/asm/cmpxchg_32.h new file mode 100644 index 000000000000..c786b0a92b51 --- /dev/null +++ b/arch/sparc/include/asm/cmpxchg_32.h @@ -0,0 +1,112 @@ +/* 32-bit atomic xchg() and cmpxchg() definitions. + * + * Copyright (C) 1996 David S. Miller (davem@davemloft.net) + * Copyright (C) 2000 Anton Blanchard (anton@linuxcare.com.au) + * Copyright (C) 2007 Kyle McMartin (kyle@parisc-linux.org) + * + * Additions by Keith M Wesolowski (wesolows@foobazco.org) based + * on asm-parisc/atomic.h Copyright (C) 2000 Philipp Rumpf <prumpf@tux.org>. + */ + +#ifndef __ARCH_SPARC_CMPXCHG__ +#define __ARCH_SPARC_CMPXCHG__ + +#include <asm/btfixup.h> + +/* 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 +} + +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; +} + +#define xchg(ptr,x) ((__typeof__(*(ptr)))__xchg((unsigned long)(x),(ptr),sizeof(*(ptr)))) + +/* 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)) + +#endif /* __ARCH_SPARC_CMPXCHG__ */ diff --git a/arch/sparc/include/asm/cmpxchg_64.h b/arch/sparc/include/asm/cmpxchg_64.h new file mode 100644 index 000000000000..b30eb37294c5 --- /dev/null +++ b/arch/sparc/include/asm/cmpxchg_64.h @@ -0,0 +1,145 @@ +/* 64-bit atomic xchg() and cmpxchg() definitions. + * + * Copyright (C) 1996, 1997, 2000 David S. Miller (davem@redhat.com) + */ + +#ifndef __ARCH_SPARC64_CMPXCHG__ +#define __ARCH_SPARC64_CMPXCHG__ + +static inline unsigned long xchg32(__volatile__ unsigned int *m, unsigned int val) +{ + unsigned long tmp1, tmp2; + + __asm__ __volatile__( +" mov %0, %1\n" +"1: lduw [%4], %2\n" +" cas [%4], %2, %0\n" +" cmp %2, %0\n" +" bne,a,pn %%icc, 1b\n" +" mov %1, %0\n" + : "=&r" (val), "=&r" (tmp1), "=&r" (tmp2) + : "0" (val), "r" (m) + : "cc", "memory"); + return val; +} + +static inline unsigned long xchg64(__volatile__ unsigned long *m, unsigned long val) +{ + unsigned long tmp1, tmp2; + + __asm__ __volatile__( +" mov %0, %1\n" +"1: ldx [%4], %2\n" +" casx [%4], %2, %0\n" +" cmp %2, %0\n" +" bne,a,pn %%xcc, 1b\n" +" mov %1, %0\n" + : "=&r" (val), "=&r" (tmp1), "=&r" (tmp2) + : "0" (val), "r" (m) + : "cc", "memory"); + return val; +} + +#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 xchg32(ptr, x); + case 8: + return xchg64(ptr, x); + } + __xchg_called_with_bad_pointer(); + return x; +} + +/* + * Atomic compare and exchange. Compare OLD with MEM, if identical, + * store NEW in MEM. Return the initial value in MEM. Success is + * indicated by comparing RETURN with OLD. + */ + +#include <asm-generic/cmpxchg-local.h> + +#define __HAVE_ARCH_CMPXCHG 1 + +static inline unsigned long +__cmpxchg_u32(volatile int *m, int old, int new) +{ + __asm__ __volatile__("cas [%2], %3, %0" + : "=&r" (new) + : "0" (new), "r" (m), "r" (old) + : "memory"); + + return new; +} + +static inline unsigned long +__cmpxchg_u64(volatile long *m, unsigned long old, unsigned long new) +{ + __asm__ __volatile__("casx [%2], %3, %0" + : "=&r" (new) + : "0" (new), "r" (m), "r" (old) + : "memory"); + + return new; +} + +/* This function doesn't exist, so you'll get a linker error + if something tries to do an invalid cmpxchg(). */ +extern void __cmpxchg_called_with_bad_pointer(void); + +static inline unsigned long +__cmpxchg(volatile void *ptr, unsigned long old, unsigned long new, int size) +{ + switch (size) { + case 4: + return __cmpxchg_u32(ptr, old, new); + case 8: + return __cmpxchg_u64(ptr, old, new); + } + __cmpxchg_called_with_bad_pointer(); + 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))); \ + }) + +/* + * cmpxchg_local and cmpxchg64_local are atomic wrt current CPU. Always make + * them available. + */ + +static inline unsigned long __cmpxchg_local(volatile void *ptr, + unsigned long old, + unsigned long new, int size) +{ + switch (size) { + case 4: + case 8: return __cmpxchg(ptr, old, new, size); + default: + return __cmpxchg_local_generic(ptr, old, new, size); + } + + return old; +} + +#define cmpxchg_local(ptr, o, n) \ + ((__typeof__(*(ptr)))__cmpxchg_local((ptr), (unsigned long)(o), \ + (unsigned long)(n), sizeof(*(ptr)))) +#define cmpxchg64_local(ptr, o, n) \ + ({ \ + BUILD_BUG_ON(sizeof(*(ptr)) != 8); \ + cmpxchg_local((ptr), (o), (n)); \ + }) + +#endif /* __ARCH_SPARC64_CMPXCHG__ */ diff --git a/arch/sparc/include/asm/cpu_type.h b/arch/sparc/include/asm/cpu_type.h new file mode 100644 index 000000000000..4ca184d95d82 --- /dev/null +++ b/arch/sparc/include/asm/cpu_type.h @@ -0,0 +1,34 @@ +#ifndef __ASM_CPU_TYPE_H +#define __ASM_CPU_TYPE_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 */ + sparc_leon = 0x08, /* Leon SoC */ +}; + +#ifdef CONFIG_SPARC32 +extern enum sparc_cpu sparc_cpu_model; + +#define ARCH_SUN4C (sparc_cpu_model==sun4c) + +#define SUN4M_NCPUS 4 /* Architectural limit of sun4m. */ + +#else + +#define sparc_cpu_model sun4u + +/* This cannot ever be a sun4c :) That's just history. */ +#define ARCH_SUN4C 0 +#endif + +#endif /* __ASM_CPU_TYPE_H */ diff --git a/arch/sparc/include/asm/exec.h b/arch/sparc/include/asm/exec.h new file mode 100644 index 000000000000..2e085881e0d1 --- /dev/null +++ b/arch/sparc/include/asm/exec.h @@ -0,0 +1,6 @@ +#ifndef __SPARC_EXEC_H +#define __SPARC_EXEC_H + +#define arch_align_stack(x) (x) + +#endif /* __SPARC_EXEC_H */ diff --git a/arch/sparc/include/asm/floppy_32.h b/arch/sparc/include/asm/floppy_32.h index 7440915e86d8..698d9559fead 100644 --- a/arch/sparc/include/asm/floppy_32.h +++ b/arch/sparc/include/asm/floppy_32.h @@ -11,7 +11,6 @@ #include <asm/page.h> #include <asm/pgtable.h> -#include <asm/system.h> #include <asm/idprom.h> #include <asm/machines.h> #include <asm/oplib.h> diff --git a/arch/sparc/include/asm/futex_64.h b/arch/sparc/include/asm/futex_64.h index 444e7bea23bc..4e899b0dabf7 100644 --- a/arch/sparc/include/asm/futex_64.h +++ b/arch/sparc/include/asm/futex_64.h @@ -4,7 +4,6 @@ #include <linux/futex.h> #include <linux/uaccess.h> #include <asm/errno.h> -#include <asm/system.h> #define __futex_cas_op(insn, ret, oldval, uaddr, oparg) \ __asm__ __volatile__( \ diff --git a/arch/sparc/include/asm/io_32.h b/arch/sparc/include/asm/io_32.h index 2006e5d359df..c1acbd891cbc 100644 --- a/arch/sparc/include/asm/io_32.h +++ b/arch/sparc/include/asm/io_32.h @@ -6,7 +6,6 @@ #include <linux/ioport.h> /* struct resource */ #include <asm/page.h> /* IO address mapping routines need this */ -#include <asm/system.h> #include <asm-generic/pci_iomap.h> #define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT) diff --git a/arch/sparc/include/asm/io_64.h b/arch/sparc/include/asm/io_64.h index 9481e5a6fa90..09b0b88aeb2a 100644 --- a/arch/sparc/include/asm/io_64.h +++ b/arch/sparc/include/asm/io_64.h @@ -6,7 +6,6 @@ #include <linux/types.h> #include <asm/page.h> /* IO address mapping routines need this */ -#include <asm/system.h> #include <asm/asi.h> #include <asm-generic/pci_iomap.h> diff --git a/arch/sparc/include/asm/irqflags_32.h b/arch/sparc/include/asm/irqflags_32.h index 14848909e0de..e414c06615c1 100644 --- a/arch/sparc/include/asm/irqflags_32.h +++ b/arch/sparc/include/asm/irqflags_32.h @@ -13,6 +13,7 @@ #ifndef __ASSEMBLY__ #include <linux/types.h> +#include <asm/psr.h> extern void arch_local_irq_restore(unsigned long); extern unsigned long arch_local_irq_save(void); diff --git a/arch/sparc/include/asm/mmu_context_64.h b/arch/sparc/include/asm/mmu_context_64.h index 666a73fef28d..a97fd085cebe 100644 --- a/arch/sparc/include/asm/mmu_context_64.h +++ b/arch/sparc/include/asm/mmu_context_64.h @@ -6,7 +6,6 @@ #ifndef __ASSEMBLY__ #include <linux/spinlock.h> -#include <asm/system.h> #include <asm/spitfire.h> #include <asm-generic/mm_hooks.h> diff --git a/arch/sparc/include/asm/ns87303.h b/arch/sparc/include/asm/ns87303.h index af755483e17d..6b947ee0f6aa 100644 --- a/arch/sparc/include/asm/ns87303.h +++ b/arch/sparc/include/asm/ns87303.h @@ -79,7 +79,6 @@ #include <linux/spinlock.h> -#include <asm/system.h> #include <asm/io.h> extern spinlock_t ns87303_lock; diff --git a/arch/sparc/include/asm/perfctr.h b/arch/sparc/include/asm/perfctr.h index 8d8720a8770d..3332d2cba6c1 100644 --- a/arch/sparc/include/asm/perfctr.h +++ b/arch/sparc/include/asm/perfctr.h @@ -168,6 +168,29 @@ struct vcounter_struct { unsigned long long vcnt1; }; +#else /* !(__KERNEL__) */ + +#ifndef CONFIG_SPARC32 + +/* Performance counter register access. */ +#define read_pcr(__p) __asm__ __volatile__("rd %%pcr, %0" : "=r" (__p)) +#define write_pcr(__p) __asm__ __volatile__("wr %0, 0x0, %%pcr" : : "r" (__p)) +#define read_pic(__p) __asm__ __volatile__("rd %%pic, %0" : "=r" (__p)) + +/* Blackbird errata workaround. See commentary in + * arch/sparc64/kernel/smp.c:smp_percpu_timer_interrupt() + * for more information. + */ +#define write_pic(__p) \ + __asm__ __volatile__("ba,pt %%xcc, 99f\n\t" \ + " nop\n\t" \ + ".align 64\n" \ + "99:wr %0, 0x0, %%pic\n\t" \ + "rd %%pic, %%g0" : : "r" (__p)) +#define reset_pic() write_pic(0) + +#endif /* !CONFIG_SPARC32 */ + #endif /* !(__KERNEL__) */ #endif /* !(PERF_COUNTER_API) */ diff --git a/arch/sparc/include/asm/pgtable_32.h b/arch/sparc/include/asm/pgtable_32.h index a790cc657476..3d7101860e68 100644 --- a/arch/sparc/include/asm/pgtable_32.h +++ b/arch/sparc/include/asm/pgtable_32.h @@ -21,7 +21,7 @@ #include <asm/vac-ops.h> #include <asm/oplib.h> #include <asm/btfixup.h> -#include <asm/system.h> +#include <asm/cpu_type.h> struct vm_area_struct; diff --git a/arch/sparc/include/asm/pgtable_64.h b/arch/sparc/include/asm/pgtable_64.h index 38ebb2c60137..6fa2f7980e6b 100644 --- a/arch/sparc/include/asm/pgtable_64.h +++ b/arch/sparc/include/asm/pgtable_64.h @@ -19,7 +19,6 @@ #include <asm/types.h> #include <asm/spitfire.h> #include <asm/asi.h> -#include <asm/system.h> #include <asm/page.h> #include <asm/processor.h> diff --git a/arch/sparc/include/asm/processor.h b/arch/sparc/include/asm/processor.h index 9da9646bf6c6..2fe99e66e760 100644 --- a/arch/sparc/include/asm/processor.h +++ b/arch/sparc/include/asm/processor.h @@ -5,4 +5,7 @@ #else #include <asm/processor_32.h> #endif + +#define nop() __asm__ __volatile__ ("nop") + #endif diff --git a/arch/sparc/include/asm/processor_64.h b/arch/sparc/include/asm/processor_64.h index 59fcebb8f440..e713db249931 100644 --- a/arch/sparc/include/asm/processor_64.h +++ b/arch/sparc/include/asm/processor_64.h @@ -18,6 +18,9 @@ #include <asm/ptrace.h> #include <asm/page.h> +/* Don't hold the runqueue lock over context switch */ +#define __ARCH_WANT_UNLOCKED_CTXSW + /* The sparc has no problems with write protection */ #define wp_works_ok 1 #define wp_works_ok__is_a_macro /* for versions in ksyms.c */ diff --git a/arch/sparc/include/asm/ptrace.h b/arch/sparc/include/asm/ptrace.h index c00c3b5c2806..ef8c7c068f53 100644 --- a/arch/sparc/include/asm/ptrace.h +++ b/arch/sparc/include/asm/ptrace.h @@ -98,6 +98,8 @@ struct sparc_trapf { */ #ifndef __ASSEMBLY__ +#include <linux/types.h> + struct pt_regs { unsigned long psr; unsigned long pc; @@ -163,7 +165,6 @@ struct sparc_stackf { #ifdef __KERNEL__ #include <linux/threads.h> -#include <asm/system.h> static inline int pt_regs_trap_type(struct pt_regs *regs) { @@ -240,8 +241,6 @@ extern unsigned long profile_pc(struct pt_regs *); #ifdef __KERNEL__ -#include <asm/system.h> - static inline bool pt_regs_is_syscall(struct pt_regs *regs) { return (regs->psr & PSR_SYSCALL); diff --git a/arch/sparc/include/asm/setup.h b/arch/sparc/include/asm/setup.h index 64718ba26434..00497abec996 100644 --- a/arch/sparc/include/asm/setup.h +++ b/arch/sparc/include/asm/setup.h @@ -13,14 +13,30 @@ #ifdef __KERNEL__ +extern char reboot_command[]; + #ifdef CONFIG_SPARC32 /* The CPU that was used for booting * Only sun4d + leon may have boot_cpu_id != 0 */ extern unsigned char boot_cpu_id; extern unsigned char boot_cpu_id4; + +extern unsigned long empty_bad_page; +extern unsigned long empty_bad_page_table; +extern unsigned long empty_zero_page; + +extern int serial_console; +static inline int con_is_present(void) +{ + return serial_console ? 0 : 1; +} #endif +extern void sun_do_break(void); +extern int stop_a_enabled; +extern int scons_pwroff; + #endif /* __KERNEL__ */ #endif /* _SPARC_SETUP_H */ diff --git a/arch/sparc/include/asm/switch_to.h b/arch/sparc/include/asm/switch_to.h new file mode 100644 index 000000000000..2dc4fa5c6f8c --- /dev/null +++ b/arch/sparc/include/asm/switch_to.h @@ -0,0 +1,8 @@ +#ifndef ___ASM_SPARC_SWITCH_TO_H +#define ___ASM_SPARC_SWITCH_TO_H +#if defined(__sparc__) && defined(__arch64__) +#include <asm/switch_to_64.h> +#else +#include <asm/switch_to_32.h> +#endif +#endif diff --git a/arch/sparc/include/asm/switch_to_32.h b/arch/sparc/include/asm/switch_to_32.h new file mode 100644 index 000000000000..e32e82b76eed --- /dev/null +++ b/arch/sparc/include/asm/switch_to_32.h @@ -0,0 +1,106 @@ +#ifndef __SPARC_SWITCH_TO_H +#define __SPARC_SWITCH_TO_H + +#include <asm/smp.h> + +extern struct thread_info *current_set[NR_CPUS]; + +/* + * 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. + */ +#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 + +#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); \ + cpumask_set_cpu(smp_processor_id(), mm_cpumask(next->active_mm)); \ + __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) + +extern void fpsave(unsigned long *fpregs, unsigned long *fsr, + void *fpqueue, unsigned long *fpqdepth); +extern void synchronize_user_stack(void); + +#endif /* __SPARC_SWITCH_TO_H */ diff --git a/arch/sparc/include/asm/switch_to_64.h b/arch/sparc/include/asm/switch_to_64.h new file mode 100644 index 000000000000..7923c4a2be38 --- /dev/null +++ b/arch/sparc/include/asm/switch_to_64.h @@ -0,0 +1,72 @@ +#ifndef __SPARC64_SWITCH_TO_64_H +#define __SPARC64_SWITCH_TO_64_H + +#include <asm/visasm.h> + +#define prepare_arch_switch(next) \ +do { \ + flushw_all(); \ +} while (0) + + /* See what happens when you design the chip correctly? + * + * We tell gcc we clobber all non-fixed-usage registers except + * for l0/l1. It will use one for 'next' and the other to hold + * the output value of 'last'. 'next' is not referenced again + * past the invocation of switch_to in the scheduler, so we need + * not preserve it's value. Hairy, but it lets us remove 2 loads + * and 2 stores in this critical code path. -DaveM + */ +#define switch_to(prev, next, last) \ +do { flush_tlb_pending(); \ + save_and_clear_fpu(); \ + /* If you are tempted to conditionalize the following */ \ + /* so that ASI is only written if it changes, think again. */ \ + __asm__ __volatile__("wr %%g0, %0, %%asi" \ + : : "r" (__thread_flag_byte_ptr(task_thread_info(next))[TI_FLAG_BYTE_CURRENT_DS]));\ + trap_block[current_thread_info()->cpu].thread = \ + task_thread_info(next); \ + __asm__ __volatile__( \ + "mov %%g4, %%g7\n\t" \ + "stx %%i6, [%%sp + 2047 + 0x70]\n\t" \ + "stx %%i7, [%%sp + 2047 + 0x78]\n\t" \ + "rdpr %%wstate, %%o5\n\t" \ + "stx %%o6, [%%g6 + %6]\n\t" \ + "stb %%o5, [%%g6 + %5]\n\t" \ + "rdpr %%cwp, %%o5\n\t" \ + "stb %%o5, [%%g6 + %8]\n\t" \ + "wrpr %%g0, 15, %%pil\n\t" \ + "mov %4, %%g6\n\t" \ + "ldub [%4 + %8], %%g1\n\t" \ + "wrpr %%g1, %%cwp\n\t" \ + "ldx [%%g6 + %6], %%o6\n\t" \ + "ldub [%%g6 + %5], %%o5\n\t" \ + "ldub [%%g6 + %7], %%o7\n\t" \ + "wrpr %%o5, 0x0, %%wstate\n\t" \ + "ldx [%%sp + 2047 + 0x70], %%i6\n\t" \ + "ldx [%%sp + 2047 + 0x78], %%i7\n\t" \ + "ldx [%%g6 + %9], %%g4\n\t" \ + "wrpr %%g0, 14, %%pil\n\t" \ + "brz,pt %%o7, switch_to_pc\n\t" \ + " mov %%g7, %0\n\t" \ + "sethi %%hi(ret_from_syscall), %%g1\n\t" \ + "jmpl %%g1 + %%lo(ret_from_syscall), %%g0\n\t" \ + " nop\n\t" \ + ".globl switch_to_pc\n\t" \ + "switch_to_pc:\n\t" \ + : "=&r" (last), "=r" (current), "=r" (current_thread_info_reg), \ + "=r" (__local_per_cpu_offset) \ + : "0" (task_thread_info(next)), \ + "i" (TI_WSTATE), "i" (TI_KSP), "i" (TI_NEW_CHILD), \ + "i" (TI_CWP), "i" (TI_TASK) \ + : "cc", \ + "g1", "g2", "g3", "g7", \ + "l1", "l2", "l3", "l4", "l5", "l6", "l7", \ + "i0", "i1", "i2", "i3", "i4", "i5", \ + "o0", "o1", "o2", "o3", "o4", "o5", "o7"); \ +} while(0) + +extern void synchronize_user_stack(void); +extern void fault_in_user_windows(void); + +#endif /* __SPARC64_SWITCH_TO_64_H */ diff --git a/arch/sparc/include/asm/system.h b/arch/sparc/include/asm/system.h deleted file mode 100644 index 7944a7cfc996..000000000000 --- a/arch/sparc/include/asm/system.h +++ /dev/null @@ -1,8 +0,0 @@ -#ifndef ___ASM_SPARC_SYSTEM_H -#define ___ASM_SPARC_SYSTEM_H -#if defined(__sparc__) && defined(__arch64__) -#include <asm/system_64.h> -#else -#include <asm/system_32.h> -#endif -#endif diff --git a/arch/sparc/include/asm/system_32.h b/arch/sparc/include/asm/system_32.h deleted file mode 100644 index aba16092a81b..000000000000 --- a/arch/sparc/include/asm/system_32.h +++ /dev/null @@ -1,284 +0,0 @@ -#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 */ - sparc_leon = 0x08, /* Leon SoC */ -}; - -/* Really, userland should not be looking at any of this... */ -#ifdef __KERNEL__ - -extern enum sparc_cpu sparc_cpu_model; - -#define ARCH_SUN4C (sparc_cpu_model==sun4c) - -#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; -extern int scons_pwroff; - -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); \ - cpumask_set_cpu(smp_processor_id(), mm_cpumask(next->active_mm)); \ - __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) */ diff --git a/arch/sparc/include/asm/system_64.h b/arch/sparc/include/asm/system_64.h deleted file mode 100644 index 10bcabce97b2..000000000000 --- a/arch/sparc/include/asm/system_64.h +++ /dev/null @@ -1,331 +0,0 @@ -#ifndef __SPARC64_SYSTEM_H -#define __SPARC64_SYSTEM_H - -#include <asm/ptrace.h> -#include <asm/processor.h> -#include <asm/visasm.h> - -#ifndef __ASSEMBLY__ - -#include <linux/irqflags.h> -#include <asm-generic/cmpxchg-local.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 */ -}; - -#define sparc_cpu_model sun4u - -/* This cannot ever be a sun4c :) That's just history. */ -#define ARCH_SUN4C 0 - -extern char reboot_command[]; - -/* These are here in an effort to more fully work around Spitfire Errata - * #51. Essentially, if a memory barrier occurs soon after a mispredicted - * branch, the chip can stop executing instructions until a trap occurs. - * Therefore, if interrupts are disabled, the chip can hang forever. - * - * It used to be believed that the memory barrier had to be right in the - * delay slot, but a case has been traced recently wherein the memory barrier - * was one instruction after the branch delay slot and the chip still hung. - * The offending sequence was the following in sym_wakeup_done() of the - * sym53c8xx_2 driver: - * - * call sym_ccb_from_dsa, 0 - * movge %icc, 0, %l0 - * brz,pn %o0, .LL1303 - * mov %o0, %l2 - * membar #LoadLoad - * - * The branch has to be mispredicted for the bug to occur. Therefore, we put - * the memory barrier explicitly into a "branch always, predicted taken" - * delay slot to avoid the problem case. - */ -#define membar_safe(type) \ -do { __asm__ __volatile__("ba,pt %%xcc, 1f\n\t" \ - " membar " type "\n" \ - "1:\n" \ - : : : "memory"); \ -} while (0) - -/* The kernel always executes in TSO memory model these days, - * and furthermore most sparc64 chips implement more stringent - * memory ordering than required by the specifications. - */ -#define mb() membar_safe("#StoreLoad") -#define rmb() __asm__ __volatile__("":::"memory") -#define wmb() __asm__ __volatile__("":::"memory") - -#endif - -#define nop() __asm__ __volatile__ ("nop") - -#define read_barrier_depends() do { } while(0) -#define set_mb(__var, __value) \ - do { __var = __value; membar_safe("#StoreLoad"); } while(0) - -#ifdef CONFIG_SMP -#define smp_mb() mb() -#define smp_rmb() rmb() -#define smp_wmb() wmb() -#else -#define smp_mb() __asm__ __volatile__("":::"memory") -#define smp_rmb() __asm__ __volatile__("":::"memory") -#define smp_wmb() __asm__ __volatile__("":::"memory") -#endif - -#define smp_read_barrier_depends() do { } while(0) - -#define flushi(addr) __asm__ __volatile__ ("flush %0" : : "r" (addr) : "memory") - -#define flushw_all() __asm__ __volatile__("flushw") - -/* Performance counter register access. */ -#define read_pcr(__p) __asm__ __volatile__("rd %%pcr, %0" : "=r" (__p)) -#define write_pcr(__p) __asm__ __volatile__("wr %0, 0x0, %%pcr" : : "r" (__p)) -#define read_pic(__p) __asm__ __volatile__("rd %%pic, %0" : "=r" (__p)) - -/* Blackbird errata workaround. See commentary in - * arch/sparc64/kernel/smp.c:smp_percpu_timer_interrupt() - * for more information. - */ -#define write_pic(__p) \ - __asm__ __volatile__("ba,pt %%xcc, 99f\n\t" \ - " nop\n\t" \ - ".align 64\n" \ - "99:wr %0, 0x0, %%pic\n\t" \ - "rd %%pic, %%g0" : : "r" (__p)) -#define reset_pic() write_pic(0) - -#ifndef __ASSEMBLY__ - -extern void sun_do_break(void); -extern int stop_a_enabled; -extern int scons_pwroff; - -extern void fault_in_user_windows(void); -extern void synchronize_user_stack(void); - -extern void __flushw_user(void); -#define flushw_user() __flushw_user() - -#define flush_user_windows flushw_user -#define flush_register_windows flushw_all - -/* Don't hold the runqueue lock over context switch */ -#define __ARCH_WANT_UNLOCKED_CTXSW -#define prepare_arch_switch(next) \ -do { \ - flushw_all(); \ -} while (0) - - /* See what happens when you design the chip correctly? - * - * We tell gcc we clobber all non-fixed-usage registers except - * for l0/l1. It will use one for 'next' and the other to hold - * the output value of 'last'. 'next' is not referenced again - * past the invocation of switch_to in the scheduler, so we need - * not preserve it's value. Hairy, but it lets us remove 2 loads - * and 2 stores in this critical code path. -DaveM - */ -#define switch_to(prev, next, last) \ -do { flush_tlb_pending(); \ - save_and_clear_fpu(); \ - /* If you are tempted to conditionalize the following */ \ - /* so that ASI is only written if it changes, think again. */ \ - __asm__ __volatile__("wr %%g0, %0, %%asi" \ - : : "r" (__thread_flag_byte_ptr(task_thread_info(next))[TI_FLAG_BYTE_CURRENT_DS]));\ - trap_block[current_thread_info()->cpu].thread = \ - task_thread_info(next); \ - __asm__ __volatile__( \ - "mov %%g4, %%g7\n\t" \ - "stx %%i6, [%%sp + 2047 + 0x70]\n\t" \ - "stx %%i7, [%%sp + 2047 + 0x78]\n\t" \ - "rdpr %%wstate, %%o5\n\t" \ - "stx %%o6, [%%g6 + %6]\n\t" \ - "stb %%o5, [%%g6 + %5]\n\t" \ - "rdpr %%cwp, %%o5\n\t" \ - "stb %%o5, [%%g6 + %8]\n\t" \ - "wrpr %%g0, 15, %%pil\n\t" \ - "mov %4, %%g6\n\t" \ - "ldub [%4 + %8], %%g1\n\t" \ - "wrpr %%g1, %%cwp\n\t" \ - "ldx [%%g6 + %6], %%o6\n\t" \ - "ldub [%%g6 + %5], %%o5\n\t" \ - "ldub [%%g6 + %7], %%o7\n\t" \ - "wrpr %%o5, 0x0, %%wstate\n\t" \ - "ldx [%%sp + 2047 + 0x70], %%i6\n\t" \ - "ldx [%%sp + 2047 + 0x78], %%i7\n\t" \ - "ldx [%%g6 + %9], %%g4\n\t" \ - "wrpr %%g0, 14, %%pil\n\t" \ - "brz,pt %%o7, switch_to_pc\n\t" \ - " mov %%g7, %0\n\t" \ - "sethi %%hi(ret_from_syscall), %%g1\n\t" \ - "jmpl %%g1 + %%lo(ret_from_syscall), %%g0\n\t" \ - " nop\n\t" \ - ".globl switch_to_pc\n\t" \ - "switch_to_pc:\n\t" \ - : "=&r" (last), "=r" (current), "=r" (current_thread_info_reg), \ - "=r" (__local_per_cpu_offset) \ - : "0" (task_thread_info(next)), \ - "i" (TI_WSTATE), "i" (TI_KSP), "i" (TI_NEW_CHILD), \ - "i" (TI_CWP), "i" (TI_TASK) \ - : "cc", \ - "g1", "g2", "g3", "g7", \ - "l1", "l2", "l3", "l4", "l5", "l6", "l7", \ - "i0", "i1", "i2", "i3", "i4", "i5", \ - "o0", "o1", "o2", "o3", "o4", "o5", "o7"); \ -} while(0) - -static inline unsigned long xchg32(__volatile__ unsigned int *m, unsigned int val) -{ - unsigned long tmp1, tmp2; - - __asm__ __volatile__( -" mov %0, %1\n" -"1: lduw [%4], %2\n" -" cas [%4], %2, %0\n" -" cmp %2, %0\n" -" bne,a,pn %%icc, 1b\n" -" mov %1, %0\n" - : "=&r" (val), "=&r" (tmp1), "=&r" (tmp2) - : "0" (val), "r" (m) - : "cc", "memory"); - return val; -} - -static inline unsigned long xchg64(__volatile__ unsigned long *m, unsigned long val) -{ - unsigned long tmp1, tmp2; - - __asm__ __volatile__( -" mov %0, %1\n" -"1: ldx [%4], %2\n" -" casx [%4], %2, %0\n" -" cmp %2, %0\n" -" bne,a,pn %%xcc, 1b\n" -" mov %1, %0\n" - : "=&r" (val), "=&r" (tmp1), "=&r" (tmp2) - : "0" (val), "r" (m) - : "cc", "memory"); - return val; -} - -#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 xchg32(ptr, x); - case 8: - return xchg64(ptr, x); - } - __xchg_called_with_bad_pointer(); - return x; -} - -extern void die_if_kernel(char *str, struct pt_regs *regs) __attribute__ ((noreturn)); - -/* - * Atomic compare and exchange. Compare OLD with MEM, if identical, - * store NEW in MEM. Return the initial value in MEM. Success is - * indicated by comparing RETURN with OLD. - */ - -#define __HAVE_ARCH_CMPXCHG 1 - -static inline unsigned long -__cmpxchg_u32(volatile int *m, int old, int new) -{ - __asm__ __volatile__("cas [%2], %3, %0" - : "=&r" (new) - : "0" (new), "r" (m), "r" (old) - : "memory"); - - return new; -} - -static inline unsigned long -__cmpxchg_u64(volatile long *m, unsigned long old, unsigned long new) -{ - __asm__ __volatile__("casx [%2], %3, %0" - : "=&r" (new) - : "0" (new), "r" (m), "r" (old) - : "memory"); - - return new; -} - -/* This function doesn't exist, so you'll get a linker error - if something tries to do an invalid cmpxchg(). */ -extern void __cmpxchg_called_with_bad_pointer(void); - -static inline unsigned long -__cmpxchg(volatile void *ptr, unsigned long old, unsigned long new, int size) -{ - switch (size) { - case 4: - return __cmpxchg_u32(ptr, old, new); - case 8: - return __cmpxchg_u64(ptr, old, new); - } - __cmpxchg_called_with_bad_pointer(); - 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))); \ - }) - -/* - * cmpxchg_local and cmpxchg64_local are atomic wrt current CPU. Always make - * them available. - */ - -static inline unsigned long __cmpxchg_local(volatile void *ptr, - unsigned long old, - unsigned long new, int size) -{ - switch (size) { - case 4: - case 8: return __cmpxchg(ptr, old, new, size); - default: - return __cmpxchg_local_generic(ptr, old, new, size); - } - - return old; -} - -#define cmpxchg_local(ptr, o, n) \ - ((__typeof__(*(ptr)))__cmpxchg_local((ptr), (unsigned long)(o), \ - (unsigned long)(n), sizeof(*(ptr)))) -#define cmpxchg64_local(ptr, o, n) \ - ({ \ - BUILD_BUG_ON(sizeof(*(ptr)) != 8); \ - cmpxchg_local((ptr), (o), (n)); \ - }) - -#endif /* !(__ASSEMBLY__) */ - -#define arch_align_stack(x) (x) - -#endif /* !(__SPARC64_SYSTEM_H) */ diff --git a/arch/sparc/include/asm/timer_32.h b/arch/sparc/include/asm/timer_32.h index 2ec030ef3810..1a91e11dd104 100644 --- a/arch/sparc/include/asm/timer_32.h +++ b/arch/sparc/include/asm/timer_32.h @@ -8,12 +8,13 @@ #ifndef _SPARC_TIMER_H #define _SPARC_TIMER_H -#include <asm/system.h> /* For SUN4M_NCPUS */ +#include <asm/cpu_type.h> /* For SUN4M_NCPUS */ #include <asm/btfixup.h> extern __volatile__ unsigned int *master_l10_counter; /* FIXME: Make do_[gs]ettimeofday btfixup calls */ +struct timespec; BTFIXUPDEF_CALL(int, bus_do_settimeofday, struct timespec *tv) #define bus_do_settimeofday(tv) BTFIXUP_CALL(bus_do_settimeofday)(tv) diff --git a/arch/sparc/include/asm/uaccess_64.h b/arch/sparc/include/asm/uaccess_64.h index 3e1449f07798..a1091afb8831 100644 --- a/arch/sparc/include/asm/uaccess_64.h +++ b/arch/sparc/include/asm/uaccess_64.h @@ -11,7 +11,6 @@ #include <linux/string.h> #include <linux/thread_info.h> #include <asm/asi.h> -#include <asm/system.h> #include <asm/spitfire.h> #include <asm-generic/uaccess-unaligned.h> #endif |