Commit 17a68777 authored by Guo Ren's avatar Guo Ren
Browse files

csky: remove unused members in processor.h 



Cleanup struct cpuinfo_csky and struct thread_struct, remove all esp0
related code. We could get pt_regs from sp and backtrace could use fp
in switch_stack.

Signed-off-by: default avatarGuo Ren <ren_guo@c-sky.com>
parent 8f4f1639

arch/csky/include/asm/processor.h

+0 −12
Original line number Diff line number Diff line
@@ -17,14 +17,7 @@ 
#endif



struct cpuinfo_csky {

	unsigned long udelay_val;

	unsigned long asid_cache;

	/*

	 * Capability and feature descriptor structure for CSKY CPU

	 */

	unsigned long options;

	unsigned int processor_id[4];

	unsigned int fpu_id;

} __aligned(SMP_CACHE_BYTES);



extern struct cpuinfo_csky cpu_data[];
@@ -50,11 +43,6 @@ extern struct cpuinfo_csky cpu_data[]; 
struct thread_struct {

	unsigned long  ksp;       /* kernel stack pointer */

	unsigned long  sr;        /* saved status register */

	unsigned long  esp0;      /* points to SR of stack frame */



	/* Other stuff associated with the thread. */

	unsigned long address;      /* Last user fault */

	unsigned long error_code;



	/* FPU regs */

	struct user_fp __aligned(16) user_fp;

arch/csky/kernel/asm-offsets.c

+0 −1
Original line number Diff line number Diff line
@@ -20,7 +20,6 @@ int main(void) 
	/* offsets into the thread struct */

	DEFINE(THREAD_KSP,        offsetof(struct thread_struct, ksp));

	DEFINE(THREAD_SR,         offsetof(struct thread_struct, sr));

	DEFINE(THREAD_ESP0,       offsetof(struct thread_struct, esp0));

	DEFINE(THREAD_FESR,       offsetof(struct thread_struct, user_fp.fesr));

	DEFINE(THREAD_FCR,        offsetof(struct thread_struct, user_fp.fcr));

	DEFINE(THREAD_FPREG,      offsetof(struct thread_struct, user_fp.vr));

arch/csky/kernel/entry.S

+0 −12
Original line number Diff line number Diff line
@@ -122,16 +122,6 @@ ENTRY(csky_systemcall) 


	psrset  ee, ie



	/* Stack frame for syscall, origin call set_esp0 */

	mov     r12, sp



	bmaski  r11, 13

	andn    r12, r11

	bgeni   r11, 9

	addi    r11, 32

	addu    r12, r11

	st      sp, (r12, 0)



	lrw     r11, __NR_syscalls

	cmphs   syscallid, r11		/* Check nr of syscall */

	bt      ret_from_exception
@@ -230,8 +220,6 @@ resume_userspace: 
1:  RESTORE_ALL



exit_work:

	mov	a0, sp			/* Stack address is arg[0] */

	jbsr	set_esp0		/* Call C level */

	btsti	r8, TIF_NEED_RESCHED

	bt	work_resched

	/* If thread_info->flag is empty, RESTORE_ALL */

arch/csky/kernel/ptrace.c

+0 −4
Original line number Diff line number Diff line
@@ -50,15 +50,11 @@ static void singlestep_enable(struct task_struct *tsk) 
 */

void user_enable_single_step(struct task_struct *child)

{

	if (child->thread.esp0 == 0)

		return;

	singlestep_enable(child);

}



void user_disable_single_step(struct task_struct *child)

{

	if (child->thread.esp0 == 0)

		return;

	singlestep_disable(child);

}

arch/csky/kernel/signal.c

+0 −2
Original line number Diff line number Diff line
@@ -238,8 +238,6 @@ static void do_signal(struct pt_regs *regs, int syscall) 
	if (!user_mode(regs))

		return;



	current->thread.esp0 = (unsigned long)regs;



	/*

	 * If we were from a system call, check for system call restarting...

	 */