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1 | #------------------------------------------------------------------------------ |
2 | # | |
3e99020d | 3 | # Copyright (c) 2008 - 2010, Intel Corporation. All rights reserved.<BR> |
4ea9375a | 4 | # This program and the accompanying materials |
e8de4680 A |
5 | # are licensed and made available under the terms and conditions of the BSD License |
6 | # which accompanies this distribution. The full text of the license may be found at | |
7 | # http://opensource.org/licenses/bsd-license.php | |
8 | # | |
9 | # THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, | |
10 | # WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. | |
11 | # | |
12 | # Module Name: | |
13 | # ProcessorAsms.S | |
14 | # | |
15 | # Abstract: | |
16 | # This is separated from processor.c to allow this functions to be built with /O1 | |
17 | # | |
18 | # | |
19 | #------------------------------------------------------------------------------ | |
20 | #include <EfiBind.h> | |
21 | ||
22 | .text | |
23 | ||
24 | .globl ASM_PFX(SwitchStacks) | |
25 | .globl ASM_PFX(TransferControlSetJump) | |
26 | .globl ASM_PFX(TransferControlLongJump) | |
27 | ||
28 | # | |
29 | # Routine Description: | |
30 | # This allows the caller to switch the stack and goes to the new entry point | |
31 | # | |
32 | # Arguments: | |
33 | # EntryPoint - Pointer to the location to enter // rcx | |
34 | # Parameter - Parameter to pass in // rdx | |
35 | # NewStack - New Location of the stack // r8 | |
36 | # NewBsp - New BSP // r9 - not used | |
37 | # | |
38 | # Returns: | |
39 | # Nothing. Goes to the Entry Point passing in the new parameters | |
40 | # | |
41 | ASM_PFX(SwitchStacks): | |
42 | ||
43 | # Adjust stack for | |
44 | # 1) leave 4 registers space | |
45 | # 2) let it 16 bytes aligned after call | |
46 | sub $0x20,%r8 | |
47 | and -0x10,%r8w # do not assume 16 bytes aligned | |
48 | ||
49 | mov %r8,%rsp | |
50 | mov %rcx,%r10 | |
51 | mov %rdx,%rcx | |
52 | callq *%r10 | |
53 | ||
54 | # | |
55 | # no ret as we have a new stack and we jumped to the new location | |
56 | # | |
57 | ret | |
58 | ||
59 | #SwitchStacks ENDP | |
60 | ||
61 | ||
62 | .equ EFI_SUCCESS, 0 | |
63 | .equ EFI_WARN_RETURN_FROM_LONG_JUMP, 5 | |
64 | ||
65 | # | |
66 | #Routine Description: | |
67 | # | |
68 | # This routine implements the x64 variant of the SetJump call. Its | |
69 | # responsibility is to store system state information for a possible | |
70 | # subsequent LongJump. | |
71 | # | |
72 | #Arguments: | |
73 | # | |
74 | # Pointer to CPU context save buffer. | |
75 | # | |
76 | #Returns: | |
77 | # | |
78 | # EFI_SUCCESS | |
79 | # | |
80 | # EFI_STATUS | |
81 | # EFIAPI | |
82 | # TransferControlLongJump ( | |
83 | # IN EFI_PEI_TRANSFER_CONTROL_PROTOCOL *This, | |
84 | # IN EFI_JUMP_BUFFER *Jump | |
85 | # ); | |
86 | # | |
87 | # rcx - *This | |
88 | # rdx - JumpBuffer | |
89 | # | |
90 | ASM_PFX(TransferControlSetJump): | |
91 | mov %rbx,(%rdx) | |
92 | mov %rsp,0x8(%rdx) | |
93 | mov %rbp,0x10(%rdx) | |
94 | mov %rdi,0x18(%rdx) | |
95 | mov %rsi,0x20(%rdx) | |
96 | mov %r10,0x28(%rdx) | |
97 | mov %r11,0x30(%rdx) | |
98 | mov %r12,0x38(%rdx) | |
99 | mov %r13,0x40(%rdx) | |
100 | mov %r14,0x48(%rdx) | |
101 | mov %r15,0x50(%rdx) | |
3e99020d LG |
102 | #; save non-volatile fp registers\r |
103 | stmxcsr 0x60(%rdx)\r | |
104 | lea 0x68(%rdx), %rax\r | |
105 | movdqu %xmm6, (%rax) \r | |
106 | movdqu %xmm7, 0x10(%rax)\r | |
107 | movdqu %xmm8, 0x20(%rax)\r | |
108 | movdqu %xmm9, 0x30(%rax)\r | |
109 | movdqu %xmm10, 0x40(%rax)\r | |
110 | movdqu %xmm11, 0x50(%rax)\r | |
111 | movdqu %xmm12, 0x60(%rax)\r | |
112 | movdqu %xmm13, 0x70(%rax)\r | |
113 | movdqu %xmm14, 0x80(%rax)\r | |
114 | movdqu %xmm15, 0x90(%rax)\r | |
e8de4680 A |
115 | mov (%rsp),%rax |
116 | mov %rax,0x58(%rdx) | |
117 | mov $0x0,%rax | |
118 | retq | |
119 | ||
120 | ||
121 | # | |
122 | # EFI_STATUS | |
123 | # EFIAPI | |
124 | # TransferControlLongJump ( | |
125 | # IN EFI_PEI_TRANSFER_CONTROL_PROTOCOL *This, // rcx | |
126 | # IN EFI_JUMP_BUFFER *Jump // rdx | |
127 | # ); | |
128 | # | |
129 | # | |
130 | ASM_PFX(TransferControlLongJump): | |
3e99020d LG |
131 | # set return from SetJump to EFI_WARN_RETURN_FROM_LONG_JUMP |
132 | #; load non-volatile fp registers\r | |
133 | ldmxcsr 0x60(%rdx)\r | |
134 | lea 0x68(%rdx), %rax\r | |
135 | movdqu (%rax), %xmm6\r | |
136 | movdqu 0x10(%rax), %xmm7\r | |
137 | movdqu 0x20(%rax), %xmm8\r | |
138 | movdqu 0x30(%rax), %xmm9\r | |
139 | movdqu 0x40(%rax), %xmm10\r | |
140 | movdqu 0x50(%rax), %xmm11\r | |
141 | movdqu 0x60(%rax), %xmm12\r | |
142 | movdqu 0x70(%rax), %xmm13\r | |
143 | movdqu 0x80(%rax), %xmm14\r | |
144 | movdqu 0x90(%rax), %xmm15\r | |
e8de4680 A |
145 | mov $0x5,%rax |
146 | mov (%rdx),%rbx | |
147 | mov 0x8(%rdx),%rsp | |
148 | mov 0x10(%rdx),%rbp | |
149 | mov 0x18(%rdx),%rdi | |
150 | mov 0x20(%rdx),%rsi | |
151 | mov 0x28(%rdx),%r10 | |
152 | mov 0x30(%rdx),%r11 | |
153 | mov 0x38(%rdx),%r12 | |
154 | mov 0x40(%rdx),%r13 | |
155 | mov 0x48(%rdx),%r14 | |
156 | mov 0x50(%rdx),%r15 | |
157 | add $0x8,%rsp | |
158 | jmpq *0x58(%rdx) | |
159 | mov $0x5,%rax | |
160 | retq | |
161 |