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authorLaszlo Ersek <lersek@redhat.com>2016-12-02 19:37:26 +0100
committerLaszlo Ersek <lersek@redhat.com>2016-12-05 19:44:44 +0100
commitbe0eaf42efe2ff3dc845b445c6d3a6e6983805bd (patch)
tree1d793b3e53cceffe4eef1f07ab10c4e59c62b5f4
parentde01f72cc77d58162cb3ba7cd06f931fc9d13822 (diff)
downloadedk2-platforms-be0eaf42efe2ff3dc845b445c6d3a6e6983805bd.tar.xz
OvmfPkg/QemuFwCfgLib: extend lib class header with more definitions
The last patch consists purely of code movement; going forward, we should use a few more symbolic constants. Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org> Cc: Jordan Justen <jordan.l.justen@intel.com> Cc: Leif Lindholm <leif.lindholm@linaro.org> Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Laszlo Ersek <lersek@redhat.com> Reviewed-by: Leif Lindholm <leif.lindholm@linaro.org> Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
-rw-r--r--OvmfPkg/Include/Library/QemuFwCfgLib.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/OvmfPkg/Include/Library/QemuFwCfgLib.h b/OvmfPkg/Include/Library/QemuFwCfgLib.h
index 40a07456c5..3e017d53a9 100644
--- a/OvmfPkg/Include/Library/QemuFwCfgLib.h
+++ b/OvmfPkg/Include/Library/QemuFwCfgLib.h
@@ -24,12 +24,20 @@
#define QEMU_FW_CFG_FNAME_SIZE 56
//
+// If the following bit is set in the UINT32 fw_cfg revision / feature bitmap
+// -- read from key 0x0001 with the basic IO Port or MMIO method --, then the
+// DMA interface is available.
+//
+#define FW_CFG_F_DMA BIT1
+
+//
// Macros for the FW_CFG_DMA_ACCESS.Control bitmap (in native encoding).
//
#define FW_CFG_DMA_CTL_ERROR BIT0
#define FW_CFG_DMA_CTL_READ BIT1
#define FW_CFG_DMA_CTL_SKIP BIT2
#define FW_CFG_DMA_CTL_SELECT BIT3
+#define FW_CFG_DMA_CTL_WRITE BIT4
typedef enum {
QemuFwCfgItemSignature = 0x0000,