diff mbox series

[v2,01/21] hw/uefi: add include/hw/uefi/var-service-api.h

Message ID 20250107153353.1144978-2-kraxel@redhat.com (mailing list archive)
State New
Headers show
Series hw/uefi: add uefi variable service | expand

Commit Message

Gerd Hoffmann Jan. 7, 2025, 3:33 p.m. UTC 
This file defines the register interface of the uefi-vars device.
It's only a handful of registers: magic value, command and status
registers, location and size of the communication buffer.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
---
 include/hw/uefi/var-service-api.h | 40 +++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)
 create mode 100644 include/hw/uefi/var-service-api.h
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Patch

diff --git a/include/hw/uefi/var-service-api.h b/include/hw/uefi/var-service-api.h
new file mode 100644
index 000000000000..37fdab32741f
--- /dev/null
+++ b/include/hw/uefi/var-service-api.h
@@ -0,0 +1,40 @@ 
+/*
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * uefi-vars device - API of the virtual device for guest/host communication.
+ */
+#ifndef QEMU_UEFI_VAR_SERVICE_API_H
+#define QEMU_UEFI_VAR_SERVICE_API_H
+
+
+/* isa: io range */
+#define UEFI_VARS_IO_BASE                   0x520
+
+/* sysbus: fdt node path */
+#define UEFI_VARS_FDT_NODE       "qemu-uefi-vars"
+#define UEFI_VARS_FDT_COMPAT     "qemu,uefi-vars"
+
+/* registers */
+#define UEFI_VARS_REG_MAGIC                  0x00  /* 16 bit */
+#define UEFI_VARS_REG_CMD_STS                0x02  /* 16 bit */
+#define UEFI_VARS_REG_BUFFER_SIZE            0x04  /* 32 bit */
+#define UEFI_VARS_REG_BUFFER_ADDR_LO         0x08  /* 32 bit */
+#define UEFI_VARS_REG_BUFFER_ADDR_HI         0x0c  /* 32 bit */
+#define UEFI_VARS_REGS_SIZE                  0x10
+
+/* magic value */
+#define UEFI_VARS_MAGIC_VALUE               0xef1
+
+/* command values */
+#define UEFI_VARS_CMD_RESET                  0x01
+#define UEFI_VARS_CMD_MM                     0x02
+
+/* status values */
+#define UEFI_VARS_STS_SUCCESS                0x00
+#define UEFI_VARS_STS_BUSY                   0x01
+#define UEFI_VARS_STS_ERR_UNKNOWN            0x10
+#define UEFI_VARS_STS_ERR_NOT_SUPPORTED      0x11
+#define UEFI_VARS_STS_ERR_BAD_BUFFER_SIZE    0x12
+
+
+#endif /* QEMU_UEFI_VAR_SERVICE_API_H */