mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-01 08:59:33 +00:00
27a66fc3f3
Move the code related to copying tables from QEMU to a separate code module. Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com> Reviewed-by: Tom Rini <trini@konsulko.com> Reviewed-by: Simon Glass <sjg@chromium.org> Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
178 lines
4 KiB
C
178 lines
4 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* (C) Copyright 2015 Miao Yan <yanmiaobest@gmail.com>
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* (C) Copyright 2021 Asherah Connor <ashe@kivikakk.ee>
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*/
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#define LOG_CATEGORY UCLASS_QFW
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#include <common.h>
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#include <acpi/acpi_table.h>
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#include <bootdev.h>
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#include <bootflow.h>
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#include <bootmeth.h>
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#include <command.h>
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#include <errno.h>
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#include <log.h>
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#include <malloc.h>
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#include <qfw.h>
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#include <dm.h>
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#include <misc.h>
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#include <tables_csum.h>
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#include <asm/acpi_table.h>
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static void qfw_read_entry_io(struct qfw_dev *qdev, u16 entry, u32 size,
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void *address)
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{
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struct dm_qfw_ops *ops = dm_qfw_get_ops(qdev->dev);
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debug("%s: entry 0x%x, size %u address %p\n", __func__, entry, size,
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address);
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ops->read_entry_io(qdev->dev, entry, size, address);
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}
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static void qfw_read_entry_dma(struct qfw_dev *qdev, u16 entry, u32 size,
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void *address)
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{
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struct dm_qfw_ops *ops = dm_qfw_get_ops(qdev->dev);
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struct qfw_dma dma = {
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.length = cpu_to_be32(size),
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.address = cpu_to_be64((uintptr_t)address),
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.control = cpu_to_be32(FW_CFG_DMA_READ),
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};
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/*
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* writing FW_CFG_INVALID will cause read operation to resume at last
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* offset, otherwise read will start at offset 0
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*/
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if (entry != FW_CFG_INVALID)
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dma.control |= cpu_to_be32(FW_CFG_DMA_SELECT | (entry << 16));
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debug("%s: entry 0x%x, size %u address %p, control 0x%x\n", __func__,
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entry, size, address, be32_to_cpu(dma.control));
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barrier();
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ops->read_entry_dma(qdev->dev, &dma);
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}
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void qfw_read_entry(struct udevice *dev, u16 entry, u32 size, void *address)
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{
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struct qfw_dev *qdev = dev_get_uclass_priv(dev);
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if (qdev->dma_present)
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qfw_read_entry_dma(qdev, entry, size, address);
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else
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qfw_read_entry_io(qdev, entry, size, address);
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}
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int qfw_register(struct udevice *dev)
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{
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struct qfw_dev *qdev = dev_get_uclass_priv(dev);
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u32 qemu, dma_enabled;
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qdev->dev = dev;
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INIT_LIST_HEAD(&qdev->fw_list);
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qfw_read_entry_io(qdev, FW_CFG_SIGNATURE, 4, &qemu);
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if (be32_to_cpu(qemu) != QEMU_FW_CFG_SIGNATURE)
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return -ENODEV;
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qfw_read_entry_io(qdev, FW_CFG_ID, 1, &dma_enabled);
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if (dma_enabled & FW_CFG_DMA_ENABLED)
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qdev->dma_present = true;
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return 0;
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}
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static int qfw_post_bind(struct udevice *dev)
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{
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int ret;
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ret = bootdev_setup_for_dev(dev, "qfw_bootdev");
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if (ret)
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return log_msg_ret("dev", ret);
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return 0;
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}
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static int qfw_get_bootflow(struct udevice *dev, struct bootflow_iter *iter,
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struct bootflow *bflow)
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{
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const struct udevice *media = dev_get_parent(dev);
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int ret;
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if (!CONFIG_IS_ENABLED(BOOTSTD))
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return -ENOSYS;
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log_debug("media=%s\n", media->name);
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ret = bootmeth_check(bflow->method, iter);
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if (ret)
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return log_msg_ret("check", ret);
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log_debug("iter->part=%d\n", iter->part);
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/* We only support the whole device, not partitions */
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if (iter->part)
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return log_msg_ret("max", -ESHUTDOWN);
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log_debug("reading bootflow with method: %s\n", bflow->method->name);
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ret = bootmeth_read_bootflow(bflow->method, bflow);
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if (ret)
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return log_msg_ret("method", ret);
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return 0;
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}
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static int qfw_bootdev_bind(struct udevice *dev)
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{
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struct bootdev_uc_plat *ucp = dev_get_uclass_plat(dev);
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ucp->prio = BOOTDEVP_4_SCAN_FAST;
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return 0;
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}
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static int qfw_bootdev_hunt(struct bootdev_hunter *info, bool show)
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{
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int ret;
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ret = uclass_probe_all(UCLASS_QFW);
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if (ret && ret != -ENOENT)
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return log_msg_ret("vir", ret);
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return 0;
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}
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UCLASS_DRIVER(qfw) = {
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.id = UCLASS_QFW,
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.name = "qfw",
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.post_bind = qfw_post_bind,
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.per_device_auto = sizeof(struct qfw_dev),
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};
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struct bootdev_ops qfw_bootdev_ops = {
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.get_bootflow = qfw_get_bootflow,
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};
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static const struct udevice_id qfw_bootdev_ids[] = {
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{ .compatible = "u-boot,bootdev-qfw" },
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{ }
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};
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U_BOOT_DRIVER(qfw_bootdev) = {
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.name = "qfw_bootdev",
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.id = UCLASS_BOOTDEV,
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.ops = &qfw_bootdev_ops,
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.bind = qfw_bootdev_bind,
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.of_match = qfw_bootdev_ids,
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};
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BOOTDEV_HUNTER(qfw_bootdev_hunter) = {
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.prio = BOOTDEVP_4_SCAN_FAST,
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.uclass = UCLASS_QFW,
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.hunt = qfw_bootdev_hunt,
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.drv = DM_DRIVER_REF(qfw_bootdev),
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};
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