diff options
Diffstat (limited to 'arch/x86/kernel/efi_stub_64.S')
| -rw-r--r-- | arch/x86/kernel/efi_stub_64.S | 109 |
1 files changed, 109 insertions, 0 deletions
diff --git a/arch/x86/kernel/efi_stub_64.S b/arch/x86/kernel/efi_stub_64.S new file mode 100644 index 00000000000..99b47d48c9f --- /dev/null +++ b/arch/x86/kernel/efi_stub_64.S | |||
| @@ -0,0 +1,109 @@ | |||
| 1 | /* | ||
| 2 | * Function calling ABI conversion from Linux to EFI for x86_64 | ||
| 3 | * | ||
| 4 | * Copyright (C) 2007 Intel Corp | ||
| 5 | * Bibo Mao <bibo.mao@intel.com> | ||
| 6 | * Huang Ying <ying.huang@intel.com> | ||
| 7 | */ | ||
| 8 | |||
| 9 | #include <linux/linkage.h> | ||
| 10 | |||
| 11 | #define SAVE_XMM \ | ||
| 12 | mov %rsp, %rax; \ | ||
| 13 | subq $0x70, %rsp; \ | ||
| 14 | and $~0xf, %rsp; \ | ||
| 15 | mov %rax, (%rsp); \ | ||
| 16 | mov %cr0, %rax; \ | ||
| 17 | clts; \ | ||
| 18 | mov %rax, 0x8(%rsp); \ | ||
| 19 | movaps %xmm0, 0x60(%rsp); \ | ||
| 20 | movaps %xmm1, 0x50(%rsp); \ | ||
| 21 | movaps %xmm2, 0x40(%rsp); \ | ||
| 22 | movaps %xmm3, 0x30(%rsp); \ | ||
| 23 | movaps %xmm4, 0x20(%rsp); \ | ||
| 24 | movaps %xmm5, 0x10(%rsp) | ||
| 25 | |||
| 26 | #define RESTORE_XMM \ | ||
| 27 | movaps 0x60(%rsp), %xmm0; \ | ||
| 28 | movaps 0x50(%rsp), %xmm1; \ | ||
| 29 | movaps 0x40(%rsp), %xmm2; \ | ||
| 30 | movaps 0x30(%rsp), %xmm3; \ | ||
| 31 | movaps 0x20(%rsp), %xmm4; \ | ||
| 32 | movaps 0x10(%rsp), %xmm5; \ | ||
| 33 | mov 0x8(%rsp), %rsi; \ | ||
| 34 | mov %rsi, %cr0; \ | ||
| 35 | mov (%rsp), %rsp | ||
| 36 | |||
| 37 | ENTRY(efi_call0) | ||
| 38 | SAVE_XMM | ||
| 39 | subq $32, %rsp | ||
| 40 | call *%rdi | ||
| 41 | addq $32, %rsp | ||
| 42 | RESTORE_XMM | ||
| 43 | ret | ||
| 44 | |||
| 45 | ENTRY(efi_call1) | ||
| 46 | SAVE_XMM | ||
| 47 | subq $32, %rsp | ||
| 48 | mov %rsi, %rcx | ||
| 49 | call *%rdi | ||
| 50 | addq $32, %rsp | ||
| 51 | RESTORE_XMM | ||
| 52 | ret | ||
| 53 | |||
| 54 | ENTRY(efi_call2) | ||
| 55 | SAVE_XMM | ||
| 56 | subq $32, %rsp | ||
| 57 | mov %rsi, %rcx | ||
| 58 | call *%rdi | ||
| 59 | addq $32, %rsp | ||
| 60 | RESTORE_XMM | ||
| 61 | ret | ||
| 62 | |||
| 63 | ENTRY(efi_call3) | ||
| 64 | SAVE_XMM | ||
| 65 | subq $32, %rsp | ||
| 66 | mov %rcx, %r8 | ||
| 67 | mov %rsi, %rcx | ||
| 68 | call *%rdi | ||
| 69 | addq $32, %rsp | ||
| 70 | RESTORE_XMM | ||
| 71 | ret | ||
| 72 | |||
| 73 | ENTRY(efi_call4) | ||
| 74 | SAVE_XMM | ||
| 75 | subq $32, %rsp | ||
| 76 | mov %r8, %r9 | ||
| 77 | mov %rcx, %r8 | ||
| 78 | mov %rsi, %rcx | ||
| 79 | call *%rdi | ||
| 80 | addq $32, %rsp | ||
| 81 | RESTORE_XMM | ||
| 82 | ret | ||
| 83 | |||
| 84 | ENTRY(efi_call5) | ||
| 85 | SAVE_XMM | ||
| 86 | subq $48, %rsp | ||
| 87 | mov %r9, 32(%rsp) | ||
| 88 | mov %r8, %r9 | ||
| 89 | mov %rcx, %r8 | ||
| 90 | mov %rsi, %rcx | ||
| 91 | call *%rdi | ||
| 92 | addq $48, %rsp | ||
| 93 | RESTORE_XMM | ||
| 94 | ret | ||
| 95 | |||
| 96 | ENTRY(efi_call6) | ||
| 97 | SAVE_XMM | ||
| 98 | mov (%rsp), %rax | ||
| 99 | mov 8(%rax), %rax | ||
| 100 | subq $48, %rsp | ||
| 101 | mov %r9, 32(%rsp) | ||
| 102 | mov %rax, 40(%rsp) | ||
| 103 | mov %r8, %r9 | ||
| 104 | mov %rcx, %r8 | ||
| 105 | mov %rsi, %rcx | ||
| 106 | call *%rdi | ||
| 107 | addq $48, %rsp | ||
| 108 | RESTORE_XMM | ||
| 109 | ret | ||