Subversion Repositories HelenOS-historic

Rev

Rev 919 | Rev 962 | Go to most recent revision | Show entire file | Ignore whitespace | Details | Blame | Last modification | View Log | RSS feed

Rev 919 Rev 921
Line 30... Line 30...
30 
#include <arch/stack.h>
 30 
#include <arch/stack.h>
31 
#include <arch/register.h>
 31 
#include <arch/register.h>
32 
#include <arch/mm/page.h>
 32 
#include <arch/mm/page.h>
33 
#include <align.h>
 33 
#include <align.h>
34 
 
 34 
 
35 
#define STACK_ITEMS		14
 35 
#define STACK_ITEMS		18
36 
#define STACK_FRAME_SIZE	ALIGN_UP((STACK_ITEMS*STACK_ITEM_SIZE) + STACK_SCRATCH_AREA_SIZE, STACK_ALIGNMENT)
 36 
#define STACK_FRAME_SIZE	ALIGN_UP((STACK_ITEMS*STACK_ITEM_SIZE) + STACK_SCRATCH_AREA_SIZE, STACK_ALIGNMENT)
37 
 
 37 
 
38 
#if (STACK_ITEMS % 2 == 0)
 38 
#if (STACK_ITEMS % 2 == 0)
39 
#	define STACK_FRAME_BIAS	8
 39 
#	define STACK_FRAME_BIAS	8
40 
#else
 40 
#else
Line 43... Line 43...
43 
 
 43 
 
44 
/** Partitioning of bank 0 registers. */
 44 
/** Partitioning of bank 0 registers. */
45 
#define R_OFFS 		r16
 45 
#define R_OFFS 		r16
46 
#define R_HANDLER	r17
 46 
#define R_HANDLER	r17
47 
#define R_RET		r18
 47 
#define R_RET		r18
- 
 
 48 
#define R_TMP		r19
48 
#define R_KSTACK_BSP	r22	/* keep in sync with before_thread_runs_arch() */
 49 
#define R_KSTACK_BSP	r22	/* keep in sync with before_thread_runs_arch() */
49 
#define R_KSTACK	r23	/* keep in sync with before_thread_runs_arch() */
 50 
#define R_KSTACK	r23	/* keep in sync with before_thread_runs_arch() */
50 
 
 51 
 
51 
/** Heavyweight interrupt handler
 52 
/** Heavyweight interrupt handler
52 
 *
 53 
 *
Line 102... Line 103...
102 
 
 103 
 
103 
	/*
 104 
	/*
104 
	 * Set p3 to true if the stack register references kernel address space.
 105 
	 * Set p3 to true if the stack register references kernel address space.
105 
	 * Set p4 to false if the stack register doesn't reference kernel address space.
 106 
	 * Set p4 to false if the stack register doesn't reference kernel address space.
106 
	 */
 107 
	 */
107 
	(p3) cmp.eq p3, p4 = VRN_KERNEL, r31 ;;
 108 
(p3)	cmp.eq p3, p4 = VRN_KERNEL, r31 ;;
108
109
109 
	/*
 110 
	/*
110 
	 * Now, p4 is true iff the stack needs to be switched to kernel stack.
 111 
	 * Now, p4 is true iff the stack needs to be switched to kernel stack.
111 
	 */
 112 
	 */
112 
	mov r30 = r12
 113 
	mov r30 = r12
113 
	(p4) mov r12 = R_KSTACK ;;
 114 
(p4)	mov r12 = R_KSTACK ;;
114
115
115 
	add r31 = -STACK_FRAME_BIAS, r12 ;;
 116 
	add r31 = -STACK_FRAME_BIAS, r12 ;;
116 
	add r12 = -STACK_FRAME_SIZE, r12
 117 
	add r12 = -STACK_FRAME_SIZE, r12
117 
 
 118 
 
118 
    /* 4. save registers in bank 0 into memory stack */
119 
    /* 4. save registers in bank 0 into memory stack */
- 
 
 120 
 
- 
 
 121 
	/*
- 
 
 122 
	 * If this is break_instruction handler,
- 
 
 123 
	 * copy input parameters to stack.
- 
 
 124 
	 */
- 
 
 125 
    	mov R_TMP = 0x2c00 ;;
- 
 
 126 
	cmp.eq p6,p5 = R_OFFS, R_TMP ;;
- 
 
 127
- 
 
 128 
	/*
- 
 
 129 
	 * From now on, if this is break_instruction handler, p6 is true and p5 is false.
- 
 
 130 
	 * Otherwise p6 is false and p5 is true.
- 
 
 131 
	 * Note that p5 is a preserved predicate register and we make use of it.
- 
 
 132 
	 */
- 
 
 133
- 
 
 134 
(p6)	st8 [r31] = r35, -8 ;;		/* save in3 */
- 
 
 135 
(p6) 	st8 [r31] = r34, -8 ;;		/* save in2 */
- 
 
 136 
(p6)	st8 [r31] = r33, -8 ;;		/* save in1 */
- 
 
 137 
(p6)	st8 [r31] = r32, -8 ;;		/* save in0 */
- 
 
 138 
(p5)	add r31 = -32, r31 ;;
- 
 
 139
119 
	st8 [r31] = r30, -8 ;;		/* save old stack pointer */
140 
	st8 [r31] = r30, -8 ;;		/* save old stack pointer */
120
141
121 
	st8 [r31] = r29, -8 ;;		/* save predicate registers */
 142 
	st8 [r31] = r29, -8 ;;		/* save predicate registers */
122 
 
 143 
 
123 
	st8 [r31] = r24, -8 ;;		/* save cr.iip */
 144 
	st8 [r31] = r24, -8 ;;		/* save cr.iip */
Line 144... Line 165...
144 
	mov r28 = ar.bspstore ;;
 165 
	mov r28 = ar.bspstore ;;
145
166
146 
	/*
 167 
	/*
147 
	 * Inspect BSPSTORE to figure out whether it is necessary to switch to kernel BSPSTORE.
 168 
	 * Inspect BSPSTORE to figure out whether it is necessary to switch to kernel BSPSTORE.
148 
	 */
 169 
	 */
149 
	(p1) shr.u r30 = r28, VRN_SHIFT ;;
 170 
(p1)	shr.u r30 = r28, VRN_SHIFT ;;
150 
	(p1) cmp.eq p1, p2 = VRN_KERNEL, r30 ;;
 171 
(p1)	cmp.eq p1, p2 = VRN_KERNEL, r30 ;;
151
172
152 
	/*
 173 
	/*
153 
	 * If BSPSTORE needs to be switched, p1 is false and p2 is true.
 174 
	 * If BSPSTORE needs to be switched, p1 is false and p2 is true.
154 
	 */
 175 
	 */
155 
	(p1) mov r30 = r28
 176 
(p1)	mov r30 = r28
156 
	(p2) mov r30 = R_KSTACK_BSP ;;
 177 
(p2)	mov r30 = R_KSTACK_BSP ;;
157 
	(p2) mov ar.bspstore = r30 ;;
 178 
(p2)	mov ar.bspstore = r30 ;;
158
179
159 
	mov r29 = ar.bsp
 180 
	mov r29 = ar.bsp
160
181
161 
	st8 [r31] = r27, -8 ;;		/* save ar.rnat */
 182 
	st8 [r31] = r27, -8 ;;		/* save ar.rnat */
162 
	st8 [r31] = r30, -8 ;;		/* save new value written to ar.bspstore */
 183 
	st8 [r31] = r30, -8 ;;		/* save new value written to ar.bspstore */
Line 266... Line 287...
266 
	mov loc19 = r3
 287 
	mov loc19 = r3
267 
	mov loc20 = r4
 288 
	mov loc20 = r4
268 
	mov loc21 = r5
 289 
	mov loc21 = r5
269 
	mov loc22 = r6
 290 
	mov loc22 = r6
270 
	mov loc23 = r7
 291 
	mov loc23 = r7
271 
	mov loc24 = r8
 292 
(p5)	mov loc24 = r8		/* only if not in break_instruction handler */
272 
	mov loc25 = r9
 293 
	mov loc25 = r9
273 
	mov loc26 = r10
 294 
	mov loc26 = r10
274 
	mov loc27 = r11
 295 
	mov loc27 = r11
275 
	/* skip r12 (stack pointer) */
 296 
	/* skip r12 (stack pointer) */
276 
	mov loc28 = r13
 297 
	mov loc28 = r13
Line 323... Line 344...
323 
	mov r3 = loc19
 344 
	mov r3 = loc19
324 
	mov r4 = loc20
 345 
	mov r4 = loc20
325 
	mov r5 = loc21
 346 
	mov r5 = loc21
326 
	mov r6 = loc22
 347 
	mov r6 = loc22
327 
	mov r7 = loc23
 348 
	mov r7 = loc23
328 
	mov r8 = loc24
 349 
(p5)	mov r8 = loc24		/* only if not in break_instruction handler */
329 
	mov r9 = loc25
 350 
	mov r9 = loc25
330 
	mov r10 = loc26
 351 
	mov r10 = loc26
331 
	mov r11 = loc27
 352 
	mov r11 = loc27
332 
	/* skip r12 (stack pointer) */
 353 
	/* skip r12 (stack pointer) */
333 
	mov r13 = loc28
 354 
	mov r13 = loc28