7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22 /*
23 * Copyright 2003 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 #pragma ident "%Z%%M% %I% %E% SMI"
28
29 #include <sys/param.h>
30 #include <sys/errno.h>
31 #include <sys/asm_linkage.h>
32 #include <sys/machthread.h>
33 #include <sys/asi.h>
34 #include <sys/privregs.h>
35 #include <sys/spitregs.h>
36
37 #if defined(lint)
38
39 #else /* lint */
40 #include "assym.h"
41 #endif /* lint */
42
43 /*
44 * fhc_shutdown_asm(u_longlong_t base, int size)
45 *
46 * Flush cpu E$ then shutdown.
47 * This function is special in that it really sets the D-tags to
48 * a known state. And this is the behavior we're looking for.
49 *
50 * The flush address is known to be a cpu-unique non-existent
51 * cacheable address. We write to non-existent memory, using
52 * the side effect of d-tag invalidation.
53 *
54 * Also, note that this function is never run from main memory.
55 * Rather it is copied to non-cacheable SRAM (hence the ..._end
56 * label at the bottom of the function). This implies that the
57 * function must be position independent code that doesn't reference
58 * cacheable real memory.
59 */
60 #if defined(lint)
61
62 /*ARGSUSED*/
63 void
64 fhc_shutdown_asm(u_longlong_t base, int size)
65 {}
66
67 #else /* lint */
68
69 ENTRY(fhc_shutdown_asm)
70 ! turn off errors (we'll be writing to non-existent memory)
71 stxa %g0, [%g0]ASI_ESTATE_ERR
72 membar #Sync ! SYNC
73
74 rdpr %pstate, %o4
75 andn %o4, PSTATE_IE | PSTATE_AM, %o3
76 wrpr %o3, %g0, %pstate
77 1:
78 brlez,pn %o1, 2f ! if (len <= 0) exit loop
79 dec 64, %o1 ! size -= 64
80 sta %g0, [%o0]ASI_MEM ! store (unpopulated) word
81 ba 1b
82 inc 64, %o0 ! addr += 64
83 2:
84 membar #Sync ! SYNC
85 shutdown ! SHUTDOWN
86 /*NOTREACHED*/
87
88 ! if, for some reason, this cpu doesn't shutdown, just sit here
89 3:
90 ba 3b
91 nop ! eventually the master will notice
92 SET_SIZE(fhc_shutdown_asm)
93
94 .global fhc_shutdown_asm_end
95 fhc_shutdown_asm_end:
96
97 #endif /* lint */
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7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22 /*
23 * Copyright 2003 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 #include <sys/param.h>
28 #include <sys/errno.h>
29 #include <sys/asm_linkage.h>
30 #include <sys/machthread.h>
31 #include <sys/asi.h>
32 #include <sys/privregs.h>
33 #include <sys/spitregs.h>
34
35 #include "assym.h"
36
37 /*
38 * fhc_shutdown_asm(u_longlong_t base, int size)
39 *
40 * Flush cpu E$ then shutdown.
41 * This function is special in that it really sets the D-tags to
42 * a known state. And this is the behavior we're looking for.
43 *
44 * The flush address is known to be a cpu-unique non-existent
45 * cacheable address. We write to non-existent memory, using
46 * the side effect of d-tag invalidation.
47 *
48 * Also, note that this function is never run from main memory.
49 * Rather it is copied to non-cacheable SRAM (hence the ..._end
50 * label at the bottom of the function). This implies that the
51 * function must be position independent code that doesn't reference
52 * cacheable real memory.
53 */
54
55 ENTRY(fhc_shutdown_asm)
56 ! turn off errors (we'll be writing to non-existent memory)
57 stxa %g0, [%g0]ASI_ESTATE_ERR
58 membar #Sync ! SYNC
59
60 rdpr %pstate, %o4
61 andn %o4, PSTATE_IE | PSTATE_AM, %o3
62 wrpr %o3, %g0, %pstate
63 1:
64 brlez,pn %o1, 2f ! if (len <= 0) exit loop
65 dec 64, %o1 ! size -= 64
66 sta %g0, [%o0]ASI_MEM ! store (unpopulated) word
67 ba 1b
68 inc 64, %o0 ! addr += 64
69 2:
70 membar #Sync ! SYNC
71 shutdown ! SHUTDOWN
72 /*NOTREACHED*/
73
74 ! if, for some reason, this cpu doesn't shutdown, just sit here
75 3:
76 ba 3b
77 nop ! eventually the master will notice
78 SET_SIZE(fhc_shutdown_asm)
79
80 .global fhc_shutdown_asm_end
81 fhc_shutdown_asm_end:
82
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