diff options
Diffstat (limited to 'arch/xtensa/include/asm/processor.h')
| -rw-r--r-- | arch/xtensa/include/asm/processor.h | 41 |
1 files changed, 28 insertions, 13 deletions
diff --git a/arch/xtensa/include/asm/processor.h b/arch/xtensa/include/asm/processor.h index 3acb26e8dea..abb59708a3b 100644 --- a/arch/xtensa/include/asm/processor.h +++ b/arch/xtensa/include/asm/processor.h @@ -5,7 +5,7 @@ * License. See the file "COPYING" in the main directory of this archive * for more details. * - * Copyright (C) 2001 - 2005 Tensilica Inc. + * Copyright (C) 2001 - 2008 Tensilica Inc. */ #ifndef _XTENSA_PROCESSOR_H @@ -68,7 +68,7 @@ /* LOCKLEVEL defines the interrupt level that masks all * general-purpose interrupts. */ -#define LOCKLEVEL 1 +#define LOCKLEVEL XCHAL_EXCM_LEVEL /* WSBITS and WBBITS are the width of the WINDOWSTART and WINDOWBASE * registers @@ -89,7 +89,7 @@ #define MAKE_PC_FROM_RA(ra,sp) (((ra) & 0x3fffffff) | ((sp) & 0xc0000000)) typedef struct { - unsigned long seg; + unsigned long seg; } mm_segment_t; struct thread_struct { @@ -145,13 +145,14 @@ struct thread_struct { * set_thread_state in signal.c depends on it. */ #define USER_PS_VALUE ((1 << PS_WOE_BIT) | \ - (1 << PS_CALLINC_SHIFT) | \ - (USER_RING << PS_RING_SHIFT) | \ - (1 << PS_UM_BIT) | \ - (1 << PS_EXCM_BIT)) + (1 << PS_CALLINC_SHIFT) | \ + (USER_RING << PS_RING_SHIFT) | \ + (1 << PS_UM_BIT) | \ + (1 << PS_EXCM_BIT)) /* Clearing a0 terminates the backtrace. */ #define start_thread(regs, new_pc, new_sp) \ + memset(regs, 0, sizeof(*regs)); \ regs->pc = new_pc; \ regs->ps = USER_PS_VALUE; \ regs->areg[1] = new_sp; \ @@ -168,12 +169,6 @@ struct mm_struct; /* Free all resources held by a thread. */ #define release_thread(thread) do { } while(0) -/* Prepare to copy thread state - unlazy all lazy status */ -extern void prepare_to_copy(struct task_struct*); - -/* Create a kernel thread without removing it from tasklists */ -extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags); - /* Copy and release all segment info associated with a VM */ #define copy_segments(p, mm) do { } while(0) #define release_segments(mm) do { } while(0) @@ -196,5 +191,25 @@ extern unsigned long get_wchan(struct task_struct *p); #define set_sr(x,sr) ({unsigned int v=(unsigned int)x; WSR(v,sr);}) #define get_sr(sr) ({unsigned int v; RSR(v,sr); v; }) +#ifndef XCHAL_HAVE_EXTERN_REGS +#define XCHAL_HAVE_EXTERN_REGS 0 +#endif + +#if XCHAL_HAVE_EXTERN_REGS + +static inline void set_er(unsigned long value, unsigned long addr) +{ + asm volatile ("wer %0, %1" : : "a" (value), "a" (addr) : "memory"); +} + +static inline unsigned long get_er(unsigned long addr) +{ + register unsigned long value; + asm volatile ("rer %0, %1" : "=a" (value) : "a" (addr) : "memory"); + return value; +} + +#endif /* XCHAL_HAVE_EXTERN_REGS */ + #endif /* __ASSEMBLY__ */ #endif /* _XTENSA_PROCESSOR_H */ |