diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2008-11-01 09:51:51 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-11-01 09:51:51 -0700 |
commit | 0242909a6135e10a28822c64f9ad50fdad52757c (patch) | |
tree | c5f9c8abe95a65433e6ac356871f2379c02488fe /arch/cris/include/arch-v32/arch/processor.h | |
parent | 0a6d2fac615972142715d736289abeeb7382e81d (diff) | |
parent | 556dcee7b829e5c350c3ffdbdb87a8b15aa3c5d3 (diff) |
Merge branch 'cris_move' of git://www.jni.nu/cris
* 'cris_move' of git://www.jni.nu/cris:
[CRIS] Move header files from include to arch/cris/include.
[CRISv32] Remove warning in io.h
Diffstat (limited to 'arch/cris/include/arch-v32/arch/processor.h')
-rw-r--r-- | arch/cris/include/arch-v32/arch/processor.h | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/arch/cris/include/arch-v32/arch/processor.h b/arch/cris/include/arch-v32/arch/processor.h new file mode 100644 index 00000000000..f80b47790ca --- /dev/null +++ b/arch/cris/include/arch-v32/arch/processor.h @@ -0,0 +1,59 @@ +#ifndef _ASM_CRIS_ARCH_PROCESSOR_H +#define _ASM_CRIS_ARCH_PROCESSOR_H + + +/* Return current instruction pointer. */ +#define current_text_addr() \ + ({void *pc; __asm__ __volatile__ ("lapcq .,%0" : "=rm" (pc)); pc;}) + +/* + * Since CRIS doesn't do hardware task-switching this hasn't really anything to + * do with the proccessor itself, it's just here for legacy reasons. This is + * used when task-switching using _resume defined in entry.S. The offsets here + * are hardcoded into _resume, so if this struct is changed, entry.S needs to be + * changed as well. + */ +struct thread_struct { + unsigned long ksp; /* Kernel stack pointer. */ + unsigned long usp; /* User stack pointer. */ + unsigned long ccs; /* Saved flags register. */ +}; + +/* + * User-space process size. This is hardcoded into a few places, so don't + * changed it unless everything's clear! + */ +#ifndef CONFIG_ETRAX_VCS_SIM +#define TASK_SIZE (0xB0000000UL) +#else +#define TASK_SIZE (0xA0000000UL) +#endif + +/* CCS I=1, enable interrupts. */ +#define INIT_THREAD { 0, 0, (1 << I_CCS_BITNR) } + +#define KSTK_EIP(tsk) \ +({ \ + unsigned long eip = 0; \ + unsigned long regs = (unsigned long)task_pt_regs(tsk); \ + if (regs > PAGE_SIZE && virt_addr_valid(regs)) \ + eip = ((struct pt_regs *)regs)->erp; \ + eip; \ +}) + +/* + * Give the thread a program location, set user-mode and switch user + * stackpointer. + */ +#define start_thread(regs, ip, usp) \ +do { \ + set_fs(USER_DS); \ + regs->erp = ip; \ + regs->ccs |= 1 << (U_CCS_BITNR + CCS_SHIFT); \ + wrusp(usp); \ +} while(0) + +/* Nothing special to do for v32 when handling a kernel bus fault fixup. */ +#define arch_fixup(regs) {}; + +#endif /* _ASM_CRIS_ARCH_PROCESSOR_H */ |