161 lines
3.5 KiB
C
161 lines
3.5 KiB
C
/*
|
|
* Copyright 2004-2009 Analog Devices Inc.
|
|
*
|
|
* Licensed under the GPL-2 or later.
|
|
*/
|
|
|
|
#ifndef __ASM_BFIN_PROCESSOR_H
|
|
#define __ASM_BFIN_PROCESSOR_H
|
|
|
|
/*
|
|
* Default implementation of macro that returns current
|
|
* instruction pointer ("program counter").
|
|
*/
|
|
#define current_text_addr() ({ __label__ _l; _l: &&_l;})
|
|
|
|
#include <asm/ptrace.h>
|
|
#include <asm/blackfin.h>
|
|
|
|
static inline unsigned long rdusp(void)
|
|
{
|
|
unsigned long usp;
|
|
|
|
__asm__ __volatile__("%0 = usp;\n\t":"=da"(usp));
|
|
return usp;
|
|
}
|
|
|
|
static inline void wrusp(unsigned long usp)
|
|
{
|
|
__asm__ __volatile__("usp = %0;\n\t"::"da"(usp));
|
|
}
|
|
|
|
static inline unsigned long __get_SP(void)
|
|
{
|
|
unsigned long sp;
|
|
|
|
__asm__ __volatile__("%0 = sp;\n\t" : "=da"(sp));
|
|
return sp;
|
|
}
|
|
|
|
/*
|
|
* User space process size: 1st byte beyond user address space.
|
|
* Fairly meaningless on nommu. Parts of user programs can be scattered
|
|
* in a lot of places, so just disable this by setting it to 0xFFFFFFFF.
|
|
*/
|
|
#define TASK_SIZE 0xFFFFFFFF
|
|
|
|
#ifdef __KERNEL__
|
|
#define STACK_TOP TASK_SIZE
|
|
#endif
|
|
|
|
#define TASK_UNMAPPED_BASE 0
|
|
|
|
struct thread_struct {
|
|
unsigned long ksp; /* kernel stack pointer */
|
|
unsigned long usp; /* user stack pointer */
|
|
unsigned short seqstat; /* saved status register */
|
|
unsigned long esp0; /* points to SR of stack frame pt_regs */
|
|
unsigned long pc; /* instruction pointer */
|
|
void * debuggerinfo;
|
|
};
|
|
|
|
#define INIT_THREAD { \
|
|
sizeof(init_stack) + (unsigned long) init_stack, 0, \
|
|
PS_S, 0, 0 \
|
|
}
|
|
|
|
extern void start_thread(struct pt_regs *regs, unsigned long new_ip,
|
|
unsigned long new_sp);
|
|
|
|
/* Forward declaration, a strange C thing */
|
|
struct task_struct;
|
|
|
|
/* Free all resources held by a thread. */
|
|
static inline void release_thread(struct task_struct *dead_task)
|
|
{
|
|
}
|
|
|
|
#define prepare_to_copy(tsk) do { } while (0)
|
|
|
|
extern int kernel_thread(int (*fn) (void *), void *arg, unsigned long flags);
|
|
|
|
/*
|
|
* Free current thread data structures etc..
|
|
*/
|
|
static inline void exit_thread(void)
|
|
{
|
|
}
|
|
|
|
/*
|
|
* Return saved PC of a blocked thread.
|
|
*/
|
|
#define thread_saved_pc(tsk) (tsk->thread.pc)
|
|
|
|
unsigned long get_wchan(struct task_struct *p);
|
|
|
|
#define KSTK_EIP(tsk) \
|
|
({ \
|
|
unsigned long eip = 0; \
|
|
if ((tsk)->thread.esp0 > PAGE_SIZE && \
|
|
MAP_NR((tsk)->thread.esp0) < max_mapnr) \
|
|
eip = ((struct pt_regs *) (tsk)->thread.esp0)->pc; \
|
|
eip; })
|
|
#define KSTK_ESP(tsk) ((tsk) == current ? rdusp() : (tsk)->thread.usp)
|
|
|
|
#define cpu_relax() smp_mb()
|
|
|
|
|
|
/* Get the Silicon Revision of the chip */
|
|
static inline uint32_t __pure bfin_revid(void)
|
|
{
|
|
/* Always use CHIPID, to work around ANOMALY_05000234 */
|
|
uint32_t revid = (bfin_read_CHIPID() & CHIPID_VERSION) >> 28;
|
|
|
|
#ifdef _BOOTROM_GET_DXE_ADDRESS_TWI
|
|
/*
|
|
* ANOMALY_05000364
|
|
* Incorrect Revision Number in DSPID Register
|
|
*/
|
|
if (ANOMALY_05000364 &&
|
|
bfin_read16(_BOOTROM_GET_DXE_ADDRESS_TWI) == 0x2796)
|
|
revid = 1;
|
|
#endif
|
|
|
|
return revid;
|
|
}
|
|
|
|
static inline uint16_t __pure bfin_cpuid(void)
|
|
{
|
|
return (bfin_read_CHIPID() & CHIPID_FAMILY) >> 12;
|
|
}
|
|
|
|
static inline uint32_t __pure bfin_dspid(void)
|
|
{
|
|
return bfin_read_DSPID();
|
|
}
|
|
|
|
static inline uint32_t __pure bfin_compiled_revid(void)
|
|
{
|
|
#if defined(CONFIG_BF_REV_0_0)
|
|
return 0;
|
|
#elif defined(CONFIG_BF_REV_0_1)
|
|
return 1;
|
|
#elif defined(CONFIG_BF_REV_0_2)
|
|
return 2;
|
|
#elif defined(CONFIG_BF_REV_0_3)
|
|
return 3;
|
|
#elif defined(CONFIG_BF_REV_0_4)
|
|
return 4;
|
|
#elif defined(CONFIG_BF_REV_0_5)
|
|
return 5;
|
|
#elif defined(CONFIG_BF_REV_0_6)
|
|
return 6;
|
|
#elif defined(CONFIG_BF_REV_ANY)
|
|
return 0xffff;
|
|
#else
|
|
return -1;
|
|
#endif
|
|
}
|
|
|
|
#endif
|