1 #ifndef _ASM_CRIS_ARCH_PROCESSOR_H
2 #define _ASM_CRIS_ARCH_PROCESSOR_H
5 /* Return current instruction pointer. */
6 #define current_text_addr() \
7 ({void *pc; __asm__ __volatile__ ("lapcq .,%0" : "=rm" (pc)); pc;})
10 * Since CRIS doesn't do hardware task-switching this hasn't really anything to
11 * do with the proccessor itself, it's just here for legacy reasons. This is
12 * used when task-switching using _resume defined in entry.S. The offsets here
13 * are hardcoded into _resume, so if this struct is changed, entry.S needs to be
16 struct thread_struct {
17 unsigned long ksp; /* Kernel stack pointer. */
18 unsigned long usp; /* User stack pointer. */
19 unsigned long ccs; /* Saved flags register. */
23 * User-space process size. This is hardcoded into a few places, so don't
24 * changed it unless everything's clear!
26 #ifndef CONFIG_ETRAX_VCS_SIM
27 #define TASK_SIZE (0xB0000000UL)
29 #define TASK_SIZE (0xA0000000UL)
32 /* CCS I=1, enable interrupts. */
33 #define INIT_THREAD { 0, 0, (1 << I_CCS_BITNR) }
35 #define KSTK_EIP(tsk) \
37 unsigned long eip = 0; \
38 unsigned long regs = (unsigned long)task_pt_regs(tsk); \
39 if (regs > PAGE_SIZE && virt_addr_valid(regs)) \
40 eip = ((struct pt_regs *)regs)->erp; \
45 * Give the thread a program location, set user-mode and switch user
48 #define start_thread(regs, ip, usp) \
51 regs->ccs |= 1 << (U_CCS_BITNR + CCS_SHIFT); \
55 /* Nothing special to do for v32 when handling a kernel bus fault fixup. */
56 #define arch_fixup(regs) {};
58 #endif /* _ASM_CRIS_ARCH_PROCESSOR_H */