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-rw-r--r--arch/ia64/kernel/minstate.h88
1 files changed, 18 insertions, 70 deletions
diff --git a/arch/ia64/kernel/minstate.h b/arch/ia64/kernel/minstate.h
index f6d8a010d99b..85ed54179afa 100644
--- a/arch/ia64/kernel/minstate.h
+++ b/arch/ia64/kernel/minstate.h
@@ -5,73 +5,6 @@
5#include "entry.h" 5#include "entry.h"
6 6
7/* 7/*
8 * For ivt.s we want to access the stack virtually so we don't have to disable translation
9 * on interrupts.
10 *
11 * On entry:
12 * r1: pointer to current task (ar.k6)
13 */
14#define MINSTATE_START_SAVE_MIN_VIRT \
15(pUStk) mov ar.rsc=0; /* set enforced lazy mode, pl 0, little-endian, loadrs=0 */ \
16 ;; \
17(pUStk) mov.m r24=ar.rnat; \
18(pUStk) addl r22=IA64_RBS_OFFSET,r1; /* compute base of RBS */ \
19(pKStk) mov r1=sp; /* get sp */ \
20 ;; \
21(pUStk) lfetch.fault.excl.nt1 [r22]; \
22(pUStk) addl r1=IA64_STK_OFFSET-IA64_PT_REGS_SIZE,r1; /* compute base of memory stack */ \
23(pUStk) mov r23=ar.bspstore; /* save ar.bspstore */ \
24 ;; \
25(pUStk) mov ar.bspstore=r22; /* switch to kernel RBS */ \
26(pKStk) addl r1=-IA64_PT_REGS_SIZE,r1; /* if in kernel mode, use sp (r12) */ \
27 ;; \
28(pUStk) mov r18=ar.bsp; \
29(pUStk) mov ar.rsc=0x3; /* set eager mode, pl 0, little-endian, loadrs=0 */
30
31#define MINSTATE_END_SAVE_MIN_VIRT \
32 bsw.1; /* switch back to bank 1 (must be last in insn group) */ \
33 ;;
34
35/*
36 * For mca_asm.S we want to access the stack physically since the state is saved before we
37 * go virtual and don't want to destroy the iip or ipsr.
38 */
39#define MINSTATE_START_SAVE_MIN_PHYS \
40(pKStk) mov r3=IA64_KR(PER_CPU_DATA);; \
41(pKStk) addl r3=THIS_CPU(ia64_mca_data),r3;; \
42(pKStk) ld8 r3 = [r3];; \
43(pKStk) addl r3=IA64_MCA_CPU_INIT_STACK_OFFSET,r3;; \
44(pKStk) addl r1=IA64_STK_OFFSET-IA64_PT_REGS_SIZE,r3; \
45(pUStk) mov ar.rsc=0; /* set enforced lazy mode, pl 0, little-endian, loadrs=0 */ \
46(pUStk) addl r22=IA64_RBS_OFFSET,r1; /* compute base of register backing store */ \
47 ;; \
48(pUStk) mov r24=ar.rnat; \
49(pUStk) addl r1=IA64_STK_OFFSET-IA64_PT_REGS_SIZE,r1; /* compute base of memory stack */ \
50(pUStk) mov r23=ar.bspstore; /* save ar.bspstore */ \
51(pUStk) dep r22=-1,r22,61,3; /* compute kernel virtual addr of RBS */ \
52 ;; \
53(pUStk) mov ar.bspstore=r22; /* switch to kernel RBS */ \
54 ;; \
55(pUStk) mov r18=ar.bsp; \
56(pUStk) mov ar.rsc=0x3; /* set eager mode, pl 0, little-endian, loadrs=0 */ \
57
58#define MINSTATE_END_SAVE_MIN_PHYS \
59 dep r12=-1,r12,61,3; /* make sp a kernel virtual address */ \
60 ;;
61
62#ifdef MINSTATE_VIRT
63# define MINSTATE_GET_CURRENT(reg) mov reg=IA64_KR(CURRENT)
64# define MINSTATE_START_SAVE_MIN MINSTATE_START_SAVE_MIN_VIRT
65# define MINSTATE_END_SAVE_MIN MINSTATE_END_SAVE_MIN_VIRT
66#endif
67
68#ifdef MINSTATE_PHYS
69# define MINSTATE_GET_CURRENT(reg) mov reg=IA64_KR(CURRENT);; tpa reg=reg
70# define MINSTATE_START_SAVE_MIN MINSTATE_START_SAVE_MIN_PHYS
71# define MINSTATE_END_SAVE_MIN MINSTATE_END_SAVE_MIN_PHYS
72#endif
73
74/*
75 * DO_SAVE_MIN switches to the kernel stacks (if necessary) and saves 8 * DO_SAVE_MIN switches to the kernel stacks (if necessary) and saves
76 * the minimum state necessary that allows us to turn psr.ic back 9 * the minimum state necessary that allows us to turn psr.ic back
77 * on. 10 * on.
@@ -97,7 +30,7 @@
97 * we can pass interruption state as arguments to a handler. 30 * we can pass interruption state as arguments to a handler.
98 */ 31 */
99#define DO_SAVE_MIN(COVER,SAVE_IFS,EXTRA) \ 32#define DO_SAVE_MIN(COVER,SAVE_IFS,EXTRA) \
100 MINSTATE_GET_CURRENT(r16); /* M (or M;;I) */ \ 33 mov r16=IA64_KR(CURRENT); /* M */ \
101 mov r27=ar.rsc; /* M */ \ 34 mov r27=ar.rsc; /* M */ \
102 mov r20=r1; /* A */ \ 35 mov r20=r1; /* A */ \
103 mov r25=ar.unat; /* M */ \ 36 mov r25=ar.unat; /* M */ \
@@ -118,7 +51,21 @@
118 SAVE_IFS; \ 51 SAVE_IFS; \
119 cmp.eq pKStk,pUStk=r0,r17; /* are we in kernel mode already? */ \ 52 cmp.eq pKStk,pUStk=r0,r17; /* are we in kernel mode already? */ \
120 ;; \ 53 ;; \
121 MINSTATE_START_SAVE_MIN \ 54(pUStk) mov ar.rsc=0; /* set enforced lazy mode, pl 0, little-endian, loadrs=0 */ \
55 ;; \
56(pUStk) mov.m r24=ar.rnat; \
57(pUStk) addl r22=IA64_RBS_OFFSET,r1; /* compute base of RBS */ \
58(pKStk) mov r1=sp; /* get sp */ \
59 ;; \
60(pUStk) lfetch.fault.excl.nt1 [r22]; \
61(pUStk) addl r1=IA64_STK_OFFSET-IA64_PT_REGS_SIZE,r1; /* compute base of memory stack */ \
62(pUStk) mov r23=ar.bspstore; /* save ar.bspstore */ \
63 ;; \
64(pUStk) mov ar.bspstore=r22; /* switch to kernel RBS */ \
65(pKStk) addl r1=-IA64_PT_REGS_SIZE,r1; /* if in kernel mode, use sp (r12) */ \
66 ;; \
67(pUStk) mov r18=ar.bsp; \
68(pUStk) mov ar.rsc=0x3; /* set eager mode, pl 0, little-endian, loadrs=0 */ \
122 adds r17=2*L1_CACHE_BYTES,r1; /* really: biggest cache-line size */ \ 69 adds r17=2*L1_CACHE_BYTES,r1; /* really: biggest cache-line size */ \
123 adds r16=PT(CR_IPSR),r1; \ 70 adds r16=PT(CR_IPSR),r1; \
124 ;; \ 71 ;; \
@@ -181,7 +128,8 @@
181 EXTRA; \ 128 EXTRA; \
182 movl r1=__gp; /* establish kernel global pointer */ \ 129 movl r1=__gp; /* establish kernel global pointer */ \
183 ;; \ 130 ;; \
184 MINSTATE_END_SAVE_MIN 131 bsw.1; /* switch back to bank 1 (must be last in insn group) */ \
132 ;;
185 133
186/* 134/*
187 * SAVE_REST saves the remainder of pt_regs (with psr.ic on). 135 * SAVE_REST saves the remainder of pt_regs (with psr.ic on).
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-30 13:49:27 -0500