mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-30 01:36:38 +07:00
60 lines
1.6 KiB
C
60 lines
1.6 KiB
C
#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_ETRAXFS_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 */
|