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https://github.com/AsahiLinux/u-boot
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The QEMU fw_cfg interface allows the guest to retrieve various data information from QEMU. For example, APCI/SMBios tables, number of online cpus, kernel data and command line, etc. This patch adds support for QEMU fw_cfg interface. Signed-off-by: Miao Yan <yanmiaobest@gmail.com> Reviewed-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com> Tested-by: Bin Meng <bmeng.cn@gmail.com>
93 lines
2 KiB
C
93 lines
2 KiB
C
/*
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* (C) Copyright 2015 Miao Yan <yanmiaobest@gmail.com>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#ifndef __FW_CFG__
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#define __FW_CFG__
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#define FW_CONTROL_PORT 0x510
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#define FW_DATA_PORT 0x511
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#define FW_DMA_PORT_LOW 0x514
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#define FW_DMA_PORT_HIGH 0x518
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enum qemu_fwcfg_items {
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FW_CFG_SIGNATURE = 0x00,
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FW_CFG_ID = 0x01,
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FW_CFG_UUID = 0x02,
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FW_CFG_RAM_SIZE = 0x03,
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FW_CFG_NOGRAPHIC = 0x04,
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FW_CFG_NB_CPUS = 0x05,
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FW_CFG_MACHINE_ID = 0x06,
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FW_CFG_KERNEL_ADDR = 0x07,
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FW_CFG_KERNEL_SIZE = 0x08,
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FW_CFG_KERNEL_CMDLINE = 0x09,
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FW_CFG_INITRD_ADDR = 0x0a,
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FW_CFG_INITRD_SIZE = 0x0b,
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FW_CFG_BOOT_DEVICE = 0x0c,
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FW_CFG_NUMA = 0x0d,
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FW_CFG_BOOT_MENU = 0x0e,
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FW_CFG_MAX_CPUS = 0x0f,
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FW_CFG_KERNEL_ENTRY = 0x10,
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FW_CFG_KERNEL_DATA = 0x11,
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FW_CFG_INITRD_DATA = 0x12,
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FW_CFG_CMDLINE_ADDR = 0x13,
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FW_CFG_CMDLINE_SIZE = 0x14,
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FW_CFG_CMDLINE_DATA = 0x15,
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FW_CFG_SETUP_ADDR = 0x16,
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FW_CFG_SETUP_SIZE = 0x17,
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FW_CFG_SETUP_DATA = 0x18,
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FW_CFG_FILE_DIR = 0x19,
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FW_CFG_FILE_FIRST = 0x20,
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FW_CFG_WRITE_CHANNEL = 0x4000,
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FW_CFG_ARCH_LOCAL = 0x8000,
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FW_CFG_INVALID = 0xffff,
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};
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#define FW_CFG_FILE_SLOTS 0x10
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#define FW_CFG_MAX_ENTRY (FW_CFG_FILE_FIRST + FW_CFG_FILE_SLOTS)
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#define FW_CFG_ENTRY_MASK ~(FW_CFG_WRITE_CHANNEL | FW_CFG_ARCH_LOCAL)
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#define FW_CFG_MAX_FILE_PATH 56
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#define QEMU_FW_CFG_SIGNATURE (('Q' << 24) | ('E' << 16) | ('M' << 8) | 'U')
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#define FW_CFG_DMA_ERROR (1 << 0)
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#define FW_CFG_DMA_READ (1 << 1)
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#define FW_CFG_DMA_SKIP (1 << 2)
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#define FW_CFG_DMA_SELECT (1 << 3)
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#define FW_CFG_DMA_ENABLED (1 << 1)
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struct fw_cfg_file {
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__be32 size;
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__be16 select;
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__be16 reserved;
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char name[FW_CFG_MAX_FILE_PATH];
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};
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struct fw_cfg_files {
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__be32 count;
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struct fw_cfg_file files[];
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};
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struct fw_cfg_dma_access {
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__be32 control;
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__be32 length;
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__be64 address;
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};
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/**
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* Initialize QEMU fw_cfg interface
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*/
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void qemu_fwcfg_init(void);
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/**
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* Get system cpu number
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*
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* @return: cpu number in system
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*/
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int qemu_fwcfg_online_cpus(void);
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#endif
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