Rev 3993 | Only display areas with differences | Ignore whitespace | Details | Blame | Last modification | View Log | RSS feed
| Rev 3993 | Rev 4638 | ||
|---|---|---|---|
| 1 | # |
1 | # |
| 2 | # Copyright (c) 2008 Pavel Rimsky |
2 | # Copyright (c) 2008 Pavel Rimsky |
| 3 | # All rights reserved. |
3 | # All rights reserved. |
| 4 | # |
4 | # |
| 5 | # Redistribution and use in source and binary forms, with or without |
5 | # Redistribution and use in source and binary forms, with or without |
| 6 | # modification, are permitted provided that the following conditions |
6 | # modification, are permitted provided that the following conditions |
| 7 | # are met: |
7 | # are met: |
| 8 | # |
8 | # |
| 9 | # - Redistributions of source code must retain the above copyright |
9 | # - Redistributions of source code must retain the above copyright |
| 10 | # notice, this list of conditions and the following disclaimer. |
10 | # notice, this list of conditions and the following disclaimer. |
| 11 | # - Redistributions in binary form must reproduce the above copyright |
11 | # - Redistributions in binary form must reproduce the above copyright |
| 12 | # notice, this list of conditions and the following disclaimer in the |
12 | # notice, this list of conditions and the following disclaimer in the |
| 13 | # documentation and/or other materials provided with the distribution. |
13 | # documentation and/or other materials provided with the distribution. |
| 14 | # - The name of the author may not be used to endorse or promote products |
14 | # - The name of the author may not be used to endorse or promote products |
| 15 | # derived from this software without specific prior written permission. |
15 | # derived from this software without specific prior written permission. |
| 16 | # |
16 | # |
| 17 | # THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
17 | # THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| 18 | # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
18 | # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| 19 | # OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
19 | # OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| 20 | # IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
20 | # IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 21 | # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
21 | # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 22 | # NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
22 | # NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 23 | # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
23 | # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 | # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
24 | # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 | # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
25 | # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 26 | # THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
26 | # THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | # |
27 | # |
| 28 | 28 | ||
| 29 | #include <arch/mm/mmu.h> |
29 | #include <arch/mm/mmu.h> |
| 30 | #include <arch/regdef.h> |
30 | #include <arch/regdef.h> |
| 31 | #include <arch/stack.h> |
31 | #include <arch/stack.h> |
| 32 | 32 | ||
| 33 | .text |
33 | .text |
| 34 | 34 | ||
| 35 | /** Switch to userspace. |
35 | /** Switch to userspace. |
| 36 | * |
36 | * |
| 37 | * %o0 Userspace entry address. |
37 | * %o0 Userspace entry address. |
| 38 | * %o1 Userspace stack pointer address. |
38 | * %o1 Userspace stack pointer address. |
| 39 | * %o2 Userspace address of uarg structure. |
39 | * %o2 Userspace address of uarg structure. |
| 40 | */ |
40 | */ |
| 41 | .global switch_to_userspace |
41 | .global switch_to_userspace |
| 42 | switch_to_userspace: |
42 | switch_to_userspace: |
| - | 43 | wrpr PSTATE_PRIV_BIT, %pstate |
|
| 43 | save %o1, -STACK_WINDOW_SAVE_AREA_SIZE, %sp |
44 | save %o1, -STACK_WINDOW_SAVE_AREA_SIZE, %sp |
| 44 | flushw |
45 | flushw |
| 45 | wrpr %g0, 0, %cleanwin ! avoid information leak |
46 | wrpr %g0, 0, %cleanwin ! avoid information leak |
| 46 | 47 | ||
| 47 | mov %i2, %o0 ! uarg |
48 | mov %i2, %o0 ! uarg |
| 48 | xor %o1, %o1, %o1 ! %o1 is defined to hold pcb_ptr |
49 | xor %o1, %o1, %o1 ! %o1 is defined to hold pcb_ptr |
| 49 | ! set it to 0 |
50 | ! set it to 0 |
| 50 | clr %i2 |
51 | clr %i2 |
| 51 | clr %i3 |
52 | clr %i3 |
| 52 | clr %i4 |
53 | clr %i4 |
| 53 | clr %i5 |
54 | clr %i5 |
| 54 | clr %i6 |
55 | clr %i6 |
| 55 | wrpr %g0, 1, %tl ! enforce mapping via nucleus |
56 | wrpr %g0, 1, %tl ! enforce mapping via nucleus |
| 56 | 57 | ||
| 57 | rdpr %cwp, %g1 |
58 | rdpr %cwp, %g1 |
| 58 | wrpr %g1, TSTATE_IE_BIT, %tstate |
59 | wrpr %g1, TSTATE_IE_BIT, %tstate |
| 59 | wrpr %i0, 0, %tnpc |
60 | wrpr %i0, 0, %tnpc |
| 60 | 61 | ||
| 61 | /* |
62 | /* |
| 62 | * Set primary context according to secondary context. |
63 | * Set primary context according to secondary context. |
| 63 | * Secondary context has been already installed by |
64 | * Secondary context has been already installed by |
| 64 | * higher-level functions. |
65 | * higher-level functions. |
| 65 | */ |
66 | */ |
| 66 | wr %g0, ASI_SECONDARY_CONTEXT_REG, %asi |
67 | wr %g0, ASI_SECONDARY_CONTEXT_REG, %asi |
| 67 | ldxa [VA_SECONDARY_CONTEXT_REG] %asi, %g1 |
68 | ldxa [VA_SECONDARY_CONTEXT_REG] %asi, %g1 |
| 68 | wr %g0, ASI_PRIMARY_CONTEXT_REG, %asi |
69 | wr %g0, ASI_PRIMARY_CONTEXT_REG, %asi |
| 69 | stxa %g1, [VA_PRIMARY_CONTEXT_REG] %asi |
70 | stxa %g1, [VA_PRIMARY_CONTEXT_REG] %asi |
| 70 | flush %i7 |
71 | flush %i7 |
| 71 | 72 | ||
| 72 | /* |
73 | /* |
| 73 | * Spills and fills will be handled by the userspace handlers. |
74 | * Spills and fills will be handled by the userspace handlers. |
| 74 | */ |
75 | */ |
| 75 | wrpr %g0, WSTATE_OTHER(0) | WSTATE_NORMAL(1), %wstate |
76 | wrpr %g0, WSTATE_OTHER(0) | WSTATE_NORMAL(1), %wstate |
| 76 | 77 | ||
| 77 | done ! jump to userspace |
78 | done ! jump to userspace |
| 78 | 79 | ||