diff options
| author | Anthony PERARD <anthony.perard@citrix.com> | 2014-10-29 06:49:10 +0000 |
|---|---|---|
| committer | jljusten <jljusten@Edk2> | 2014-10-29 06:49:10 +0000 |
| commit | abcbbb14a44a83b4cdf90137307a62e7b58e6720 (patch) | |
| tree | 233c7beab4c4edcc10b0936cd8ef56e3accde136 /OvmfPkg/XenBusDxe/X64 | |
| parent | a154f420147b0a3f449bb52da1e76dabef3478a5 (diff) | |
| download | edk2-platforms-abcbbb14a44a83b4cdf90137307a62e7b58e6720.tar.xz | |
OvmfPkg/XenBusDxe: Add support to make Xen Hypercalls.
Change in V4:
- Replace the license by the commonly used file header text.
- add file header to XenHypercall.h (license, copyright, brief desc)
Change in V3:
- adding IA32 support. (not reviewed yet)
both XenBusDxe/Ia32/hypercall.{S,asm} file are new
Change in V2:
- file header, copyright
- Add License
- Add push/pop instruction.
- fix types
- Comment of exported functions
- Improve coding style
- Add error handling in the main init function (of the drivers)
- Comment assembly
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@16260 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'OvmfPkg/XenBusDxe/X64')
| -rw-r--r-- | OvmfPkg/XenBusDxe/X64/hypercall.S | 22 | ||||
| -rw-r--r-- | OvmfPkg/XenBusDxe/X64/hypercall.asm | 26 |
2 files changed, 48 insertions, 0 deletions
diff --git a/OvmfPkg/XenBusDxe/X64/hypercall.S b/OvmfPkg/XenBusDxe/X64/hypercall.S new file mode 100644 index 0000000000..83cf466953 --- /dev/null +++ b/OvmfPkg/XenBusDxe/X64/hypercall.S @@ -0,0 +1,22 @@ +# INTN
+# EFIAPI
+# XenHypercall2 (
+# IN VOID *HypercallAddr,
+# IN OUT INTN Arg1,
+# IN OUT INTN Arg2
+# );
+ASM_GLOBAL ASM_PFX(XenHypercall2)
+ASM_PFX(XenHypercall2):
+ push %rdi
+ push %rsi
+ # Copy HypercallAddr to rax
+ movq %rcx, %rax
+ # Copy Arg1 to the register expected by Xen
+ movq %rdx, %rdi
+ # Copy Arg2 to the register expected by Xen
+ movq %r8, %rsi
+ # Call HypercallAddr
+ call *%rax
+ pop %rsi
+ pop %rdi
+ ret
diff --git a/OvmfPkg/XenBusDxe/X64/hypercall.asm b/OvmfPkg/XenBusDxe/X64/hypercall.asm new file mode 100644 index 0000000000..5b3451473d --- /dev/null +++ b/OvmfPkg/XenBusDxe/X64/hypercall.asm @@ -0,0 +1,26 @@ +.code
+
+; INTN
+; EFIAPI
+; XenHypercall2 (
+; IN VOID *HypercallAddr,
+; IN OUT INTN Arg1,
+; IN OUT INTN Arg2
+; );
+XenHypercall2 PROC
+ push rdi
+ push rsi
+ ; Copy HypercallAddr to rax
+ mov rax, rcx
+ ; Copy Arg1 to the register expected by Xen
+ mov rdi, rdx
+ ; Copy Arg2 to the register expected by Xen
+ mov rsi, r8
+ ; Call HypercallAddr
+ call rax
+ pop rsi
+ pop rdi
+ ret
+XenHypercall2 ENDP
+
+END
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