mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-25 12:00:53 +07:00
de3025f4e2
Add silicon revision "any" and "none". Add proper -mcpu option according to the cpu and silicon revision configuration. Need update to use latest Blackfin cross compile toolchain. Signed-off-by: Jie Zhang <jie.zhang@analog.com> Signed-off-by: Mike Frysinger <michael.frysinger@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
135 lines
3.2 KiB
C
135 lines
3.2 KiB
C
#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/blackfin.h>
|
|
#include <asm/segment.h>
|
|
#include <linux/compiler.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));
|
|
}
|
|
|
|
/*
|
|
* User space process size: 1st byte beyond user address space.
|
|
*/
|
|
extern unsigned long memory_end;
|
|
#define TASK_SIZE (memory_end)
|
|
|
|
#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 \
|
|
}
|
|
|
|
/*
|
|
* Do necessary setup to start up a newly executed thread.
|
|
*
|
|
* pass the data segment into user programs if it exists,
|
|
* it can't hurt anything as far as I can tell
|
|
*/
|
|
#define start_thread(_regs, _pc, _usp) \
|
|
do { \
|
|
set_fs(USER_DS); \
|
|
(_regs)->pc = (_pc); \
|
|
if (current->mm) \
|
|
(_regs)->p5 = current->mm->start_data; \
|
|
task_thread_info(current)->l1_task_info.stack_start \
|
|
= (void *)current->mm->context.stack_start; \
|
|
task_thread_info(current)->l1_task_info.lowest_sp = (void *)(_usp); \
|
|
memcpy(L1_SCRATCH_TASK_INFO, &task_thread_info(current)->l1_task_info, \
|
|
sizeof(*L1_SCRATCH_TASK_INFO)); \
|
|
wrusp(_usp); \
|
|
} while(0)
|
|
|
|
/* 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() barrier()
|
|
|
|
/* Get the Silicon Revision of the chip */
|
|
static inline __attribute_pure__ uint32_t bfin_revid(void)
|
|
{
|
|
/* stored in the upper 4 bits */
|
|
return bfin_read_CHIPID() >> 28;
|
|
}
|
|
|
|
static inline __attribute_pure__ uint32_t 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_ANY)
|
|
return 0xffff;
|
|
#else
|
|
return -1;
|
|
#endif
|
|
}
|
|
|
|
#endif
|