powerpc/kernel/interrupt_64.S

1 #include <asm/asm-offsets.h>
4 #include <asm/exception-64s.h>
6 #include <asm/exception-64e.h>
8 #include <asm/feature-fixups.h>
9 #include <asm/head-64.h>
63 	li	r11,0
64 	/* Save syscall parameters in r3-r8 */
66 	/* Zero r9-r12, this should only be required when restoring all GPRs */
76 	li	r11,\trapnr
91 	 * scv enters with MSR[EE]=1 and is immediately considered soft-masked.
108 	li	r5,1 /* scv */
114 	bne-	syscall_vectored_\name\()_restart
115 	li	r11,IRQS_ENABLED
117 	li	r11,0
136 	/* rfscv returns with LR->NIA and CTR->MSR */
186 	li	r11,IRQS_ALL_DISABLED
202  * which is tested by system_call_exception when r0 is -1 (as set by vector
235 	li	r11,0
236 	/* Save syscall parameters in r3-r8 */
238 	/* Zero r9-r12, this should only be required when restoring all GPRs */
253 	rldimi	r12,r11,28,(63-28)
254 	li	r11,0xc00
266 	li	r11,1
271 	 * We always enter kernel from userspace with irq soft-mask enabled and
275 	li	r11,IRQS_ALL_DISABLED
278 	li	r12,-1 /* Set MSR_EE and MSR_RI */
293 	li	r5,0 /* !scv */
300 	bne-	syscall_restart
302 	li	r11,IRQS_ENABLED
304 	li	r11,0
315 	li	r4,0
373 	li	r11,IRQS_ALL_DISABLED
401 	li	r3,0 /* 0 return value, no EMULATE_STACK_STORE */
425 	bne-	.Lrestore_nvgprs_\srr
433 	bne-	interrupt_return_\srr\()_user_restart
435 	li	r11,IRQS_ENABLED
437 	li	r11,0
449 	li	r4,0
491 	li	r0,0
524 	li	r11,IRQS_ALL_DISABLED
549 	 * Returning to soft-disabled context.
571 	li	r10,0
585 	 * In the soft-enabled case, need to double-check that we have no
599 	bne-	interrupt_return_\srr\()_kernel_restart
601 	li	r11,0
614 	li	r4,0
646 	li	r0,0
662 	bne-	cr1,1f /* emulate stack store */
677 	 * store the previous value of r1 to the stack before re-loading our
706 	li	r11,IRQS_ALL_DISABLED
732 	li	r3,0	/* fork() return value */
739 	li	r3,0	/* fork() return value */
750 	li	r3,0