add ip1811 driver

hc

2023-11-22 9ca5fbcb63a8dcaee0527f96afb91dc4b4bd8fa9

 kernel/arch/powerpc/kernel/entry_64.S
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@@ -176,7 +176,7 @@
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  * based on caller's run-mode / personality.
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  */
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 	ld	r11,SYS_CALL_TABLE@toc(2)
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-	andi.	r10,r10,_TIF_32BIT
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+	andis.	r10,r10,_TIF_32BIT@h
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 	beq	15f
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 	addi	r11,r11,8	/* use 32-bit syscall entries */
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 	clrldi	r3,r3,32
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@@ -250,7 +250,9 @@
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 	ld	r9,TI_FLAGS(r12)
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 	li	r11,-MAX_ERRNO
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-	andi.	r0,r9,(_TIF_SYSCALL_DOTRACE|_TIF_SINGLESTEP|_TIF_USER_WORK_MASK|_TIF_PERSYSCALL_MASK)
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+	lis	r0,(_TIF_SYSCALL_DOTRACE|_TIF_SINGLESTEP|_TIF_USER_WORK_MASK|_TIF_PERSYSCALL_MASK)@h
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+	ori	r0,r0,(_TIF_SYSCALL_DOTRACE|_TIF_SINGLESTEP|_TIF_USER_WORK_MASK|_TIF_PERSYSCALL_MASK)@l
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+	and.	r0,r9,r0
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 	bne-	.Lsyscall_exit_work
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 	andi.	r0,r8,MSR_FP
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@@ -363,25 +365,25 @@
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 	/* If TIF_RESTOREALL is set, don't scribble on either r3 or ccr.
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 	 If TIF_NOERROR is set, just save r3 as it is. */
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-	andi.	r0,r9,_TIF_RESTOREALL
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+	andis.	r0,r9,_TIF_RESTOREALL@h
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 	beq+	0f
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 	REST_NVGPRS(r1)
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 	b	2f
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 0:	cmpld	r3,r11		/* r11 is -MAX_ERRNO */
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 	blt+	1f
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-	andi.	r0,r9,_TIF_NOERROR
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+	andis.	r0,r9,_TIF_NOERROR@h
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 	bne-	1f
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 	ld	r5,_CCR(r1)
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 	neg	r3,r3
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 	oris	r5,r5,0x1000	/* Set SO bit in CR */
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 	std	r5,_CCR(r1)
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 1:	std	r3,GPR3(r1)
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-2:	andi.	r0,r9,(_TIF_PERSYSCALL_MASK)
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+2:	andis.	r0,r9,(_TIF_PERSYSCALL_MASK)@h
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 	beq	4f
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 	/* Clear per-syscall TIF flags if any are set.  */
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-	li	r11,_TIF_PERSYSCALL_MASK
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+	lis	r11,(_TIF_PERSYSCALL_MASK)@h
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 	addi	r12,r12,TI_FLAGS
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 3:	ldarx	r10,0,r12
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 	andc	r10,r10,r11
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@@ -774,7 +776,7 @@
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 	bl	restore_math
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 	b	restore
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 #endif
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-1:	andi.	r0,r4,_TIF_NEED_RESCHED
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+1:	andi.	r0,r4,_TIF_NEED_RESCHED_MASK
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 	beq	2f
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 	bl	restore_interrupts
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 	SCHEDULE_USER
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@@ -836,10 +838,18 @@
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 #ifdef CONFIG_PREEMPT
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 	/* Check if we need to preempt */
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-	andi.	r0,r4,_TIF_NEED_RESCHED
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-	beq+	restore
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-	/* Check that preempt_count() == 0 and interrupts are enabled */
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 	lwz	r8,TI_PREEMPT(r9)
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+	cmpwi	0,r8,0		/* if non-zero, just restore regs and return */
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+	bne	restore
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+	andi.	r0,r4,_TIF_NEED_RESCHED
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+	bne+	check_count
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+
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+	andi.	r0,r4,_TIF_NEED_RESCHED_LAZY
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+	beq+	restore
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+	lwz	r8,TI_PREEMPT_LAZY(r9)
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+
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+	/* Check that preempt_count() == 0 and interrupts are enabled */
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+check_count:
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 	cmpwi	cr0,r8,0
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 	bne	restore
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 	ld	r0,SOFTE(r1)
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@@ -856,7 +866,7 @@
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 	/* Re-test flags and eventually loop */
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 	CURRENT_THREAD_INFO(r9, r1)
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 	ld	r4,TI_FLAGS(r9)
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-	andi.	r0,r4,_TIF_NEED_RESCHED
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+	andi.	r0,r4,_TIF_NEED_RESCHED_MASK
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 	bne	1b
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 	/*