| 1 | /** @file
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| 2 | Macros for accessing QEMU's CPU hotplug register block.
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| 3 |
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| 4 | Copyright (C) 2019, Red Hat, Inc.
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| 5 |
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| 6 | SPDX-License-Identifier: BSD-2-Clause-Patent
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| 7 |
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| 8 | @par Specification Reference:
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| 9 |
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| 10 | - "docs/specs/acpi_cpu_hotplug.txt" in the QEMU source tree.
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| 11 |
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| 12 | The original (now "legacy") CPU hotplug interface appeared in QEMU v1.5.0.
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| 13 | The new ("modern") hotplug interface appeared in QEMU v2.7.0.
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| 14 |
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| 15 | The macros in this header file map to the minimal subset of the modern
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| 16 | interface that OVMF needs.
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| 17 | **/
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| 18 |
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| 19 | #ifndef QEMU_CPU_HOTPLUG_H_
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| 20 | #define QEMU_CPU_HOTPLUG_H_
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| 21 |
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| 22 | #include <Base.h>
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| 23 |
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| 24 | //
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| 25 | // Each register offset is:
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| 26 | // - relative to the board-dependent IO base address of the register block,
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| 27 | // - named QEMU_CPUHP_(R|W|RW)_*, according to the possible access modes of the
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| 28 | // register,
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| 29 | // - followed by distinguished bitmasks or values in the register.
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| 30 | //
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| 31 | #define QEMU_CPUHP_R_CMD_DATA2 0x0
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| 32 |
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| 33 | #define QEMU_CPUHP_R_CPU_STAT 0x4
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| 34 | #define QEMU_CPUHP_STAT_ENABLED BIT0
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| 35 | #define QEMU_CPUHP_STAT_INSERT BIT1
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| 36 | #define QEMU_CPUHP_STAT_REMOVE BIT2
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| 37 | #define QEMU_CPUHP_STAT_EJECT BIT3
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| 38 | #define QEMU_CPUHP_STAT_FW_REMOVE BIT4
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| 39 |
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| 40 | #define QEMU_CPUHP_RW_CMD_DATA 0x8
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| 41 |
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| 42 | #define QEMU_CPUHP_W_CPU_SEL 0x0
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| 43 |
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| 44 | #define QEMU_CPUHP_W_CMD 0x5
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| 45 | #define QEMU_CPUHP_CMD_GET_PENDING 0x0
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| 46 | #define QEMU_CPUHP_CMD_GET_ARCH_ID 0x3
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| 47 |
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| 48 | #endif // QEMU_CPU_HOTPLUG_H_
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