1 files changed, 319 insertions, 0 deletions

diff --git a/roms/u-boot/drivers/misc/qfw.c b/roms/u-boot/drivers/misc/qfw.c
new file mode 100644
index 000000000..ea00be88a
--- /dev/null
+++ b/roms/u-boot/drivers/misc/qfw.c
@@ -0,0 +1,319 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * (C) Copyright 2015 Miao Yan <yanmiaobest@gmail.com>
+ * (C) Copyright 2021 Asherah Connor <ashe@kivikakk.ee>
+ */
+
+#define LOG_CATEGORY UCLASS_QFW
+
+#include <common.h>
+#include <command.h>
+#include <errno.h>
+#include <log.h>
+#include <malloc.h>
+#include <qfw.h>
+#include <dm.h>
+#include <misc.h>
+#ifdef CONFIG_GENERATE_ACPI_TABLE
+#include <asm/tables.h>
+#endif
+
+#ifdef CONFIG_GENERATE_ACPI_TABLE
+/*
+ * This function allocates memory for ACPI tables
+ *
+ * @entry : BIOS linker command entry which tells where to allocate memory
+ *          (either high memory or low memory)
+ * @addr  : The address that should be used for low memory allcation. If the
+ *          memory allocation request is 'ZONE_HIGH' then this parameter will
+ *          be ignored.
+ * @return: 0 on success, or negative value on failure
+ */
+static int bios_linker_allocate(struct udevice *dev,
+				struct bios_linker_entry *entry, ulong *addr)
+{
+	uint32_t size, align;
+	struct fw_file *file;
+	unsigned long aligned_addr;
+
+	align = le32_to_cpu(entry->alloc.align);
+	/* align must be power of 2 */
+	if (align & (align - 1)) {
+		printf("error: wrong alignment %u\n", align);
+		return -EINVAL;
+	}
+
+	file = qfw_find_file(dev, entry->alloc.file);
+	if (!file) {
+		printf("error: can't find file %s\n", entry->alloc.file);
+		return -ENOENT;
+	}
+
+	size = be32_to_cpu(file->cfg.size);
+
+	/*
+	 * ZONE_HIGH means we need to allocate from high memory, since
+	 * malloc space is already at the end of RAM, so we directly use it.
+	 * If allocation zone is ZONE_FSEG, then we use the 'addr' passed
+	 * in which is low memory
+	 */
+	if (entry->alloc.zone == BIOS_LINKER_LOADER_ALLOC_ZONE_HIGH) {
+		aligned_addr = (unsigned long)memalign(align, size);
+		if (!aligned_addr) {
+			printf("error: allocating resource\n");
+			return -ENOMEM;
+		}
+	} else if (entry->alloc.zone == BIOS_LINKER_LOADER_ALLOC_ZONE_FSEG) {
+		aligned_addr = ALIGN(*addr, align);
+	} else {
+		printf("error: invalid allocation zone\n");
+		return -EINVAL;
+	}
+
+	debug("bios_linker_allocate: allocate file %s, size %u, zone %d, align %u, addr 0x%lx\n",
+	      file->cfg.name, size, entry->alloc.zone, align, aligned_addr);
+
+	qfw_read_entry(dev, be16_to_cpu(file->cfg.select), size,
+		       (void *)aligned_addr);
+	file->addr = aligned_addr;
+
+	/* adjust address for low memory allocation */
+	if (entry->alloc.zone == BIOS_LINKER_LOADER_ALLOC_ZONE_FSEG)
+		*addr = (aligned_addr + size);
+
+	return 0;
+}
+
+/*
+ * This function patches ACPI tables previously loaded
+ * by bios_linker_allocate()
+ *
+ * @entry : BIOS linker command entry which tells how to patch
+ *          ACPI tables
+ * @return: 0 on success, or negative value on failure
+ */
+static int bios_linker_add_pointer(struct udevice *dev,
+				   struct bios_linker_entry *entry)
+{
+	struct fw_file *dest, *src;
+	uint32_t offset = le32_to_cpu(entry->pointer.offset);
+	uint64_t pointer = 0;
+
+	dest = qfw_find_file(dev, entry->pointer.dest_file);
+	if (!dest || !dest->addr)
+		return -ENOENT;
+	src = qfw_find_file(dev, entry->pointer.src_file);
+	if (!src || !src->addr)
+		return -ENOENT;
+
+	debug("bios_linker_add_pointer: dest->addr 0x%lx, src->addr 0x%lx, offset 0x%x size %u, 0x%llx\n",
+	      dest->addr, src->addr, offset, entry->pointer.size, pointer);
+
+	memcpy(&pointer, (char *)dest->addr + offset, entry->pointer.size);
+	pointer	= le64_to_cpu(pointer);
+	pointer += (unsigned long)src->addr;
+	pointer	= cpu_to_le64(pointer);
+	memcpy((char *)dest->addr + offset, &pointer, entry->pointer.size);
+
+	return 0;
+}
+
+/*
+ * This function updates checksum fields of ACPI tables previously loaded
+ * by bios_linker_allocate()
+ *
+ * @entry : BIOS linker command entry which tells where to update ACPI table
+ *          checksums
+ * @return: 0 on success, or negative value on failure
+ */
+static int bios_linker_add_checksum(struct udevice *dev,
+				    struct bios_linker_entry *entry)
+{
+	struct fw_file *file;
+	uint8_t *data, cksum = 0;
+	uint8_t *cksum_start;
+
+	file = qfw_find_file(dev, entry->cksum.file);
+	if (!file || !file->addr)
+		return -ENOENT;
+
+	data = (uint8_t *)(file->addr + le32_to_cpu(entry->cksum.offset));
+	cksum_start = (uint8_t *)(file->addr + le32_to_cpu(entry->cksum.start));
+	cksum = table_compute_checksum(cksum_start,
+				       le32_to_cpu(entry->cksum.length));
+	*data = cksum;
+
+	return 0;
+}
+
+/* This function loads and patches ACPI tables provided by QEMU */
+ulong write_acpi_tables(ulong addr)
+{
+	int i, ret;
+	struct fw_file *file;
+	struct bios_linker_entry *table_loader;
+	struct bios_linker_entry *entry;
+	uint32_t size;
+	struct udevice *dev;
+
+	ret = qfw_get_dev(&dev);
+	if (ret) {
+		printf("error: no qfw\n");
+		return addr;
+	}
+
+	/* make sure fw_list is loaded */
+	ret = qfw_read_firmware_list(dev);
+	if (ret) {
+		printf("error: can't read firmware file list\n");
+		return addr;
+	}
+
+	file = qfw_find_file(dev, "etc/table-loader");
+	if (!file) {
+		printf("error: can't find etc/table-loader\n");
+		return addr;
+	}
+
+	size = be32_to_cpu(file->cfg.size);
+	if ((size % sizeof(*entry)) != 0) {
+		printf("error: table-loader maybe corrupted\n");
+		return addr;
+	}
+
+	table_loader = malloc(size);
+	if (!table_loader) {
+		printf("error: no memory for table-loader\n");
+		return addr;
+	}
+
+	qfw_read_entry(dev, be16_to_cpu(file->cfg.select), size, table_loader);
+
+	for (i = 0; i < (size / sizeof(*entry)); i++) {
+		entry = table_loader + i;
+		switch (le32_to_cpu(entry->command)) {
+		case BIOS_LINKER_LOADER_COMMAND_ALLOCATE:
+			ret = bios_linker_allocate(dev, entry, &addr);
+			if (ret)
+				goto out;
+			break;
+		case BIOS_LINKER_LOADER_COMMAND_ADD_POINTER:
+			ret = bios_linker_add_pointer(dev, entry);
+			if (ret)
+				goto out;
+			break;
+		case BIOS_LINKER_LOADER_COMMAND_ADD_CHECKSUM:
+			ret = bios_linker_add_checksum(dev, entry);
+			if (ret)
+				goto out;
+			break;
+		default:
+			break;
+		}
+	}
+
+out:
+	if (ret) {
+		struct fw_cfg_file_iter iter;
+		for (file = qfw_file_iter_init(dev, &iter);
+		     !qfw_file_iter_end(&iter);
+		     file = qfw_file_iter_next(&iter)) {
+			if (file->addr) {
+				free((void *)file->addr);
+				file->addr = 0;
+			}
+		}
+	}
+
+	free(table_loader);
+	return addr;
+}
+
+ulong acpi_get_rsdp_addr(void)
+{
+	int ret;
+	struct fw_file *file;
+	struct udevice *dev;
+
+	ret = qfw_get_dev(&dev);
+	if (ret) {
+		printf("error: no qfw\n");
+		return 0;
+	}
+
+	file = qfw_find_file(dev, "etc/acpi/rsdp");
+	return file->addr;
+}
+#endif
+
+static void qfw_read_entry_io(struct qfw_dev *qdev, u16 entry, u32 size,
+			      void *address)
+{
+	struct dm_qfw_ops *ops = dm_qfw_get_ops(qdev->dev);
+
+	debug("%s: entry 0x%x, size %u address %p\n", __func__, entry, size,
+	      address);
+
+	ops->read_entry_io(qdev->dev, entry, size, address);
+}
+
+static void qfw_read_entry_dma(struct qfw_dev *qdev, u16 entry, u32 size,
+			       void *address)
+{
+	struct dm_qfw_ops *ops = dm_qfw_get_ops(qdev->dev);
+
+	struct qfw_dma dma = {
+		.length = cpu_to_be32(size),
+		.address = cpu_to_be64((uintptr_t)address),
+		.control = cpu_to_be32(FW_CFG_DMA_READ),
+	};
+
+	/*
+	 * writing FW_CFG_INVALID will cause read operation to resume at last
+	 * offset, otherwise read will start at offset 0
+	 */
+	if (entry != FW_CFG_INVALID)
+		dma.control |= cpu_to_be32(FW_CFG_DMA_SELECT | (entry << 16));
+
+	debug("%s: entry 0x%x, size %u address %p, control 0x%x\n", __func__,
+	      entry, size, address, be32_to_cpu(dma.control));
+
+	barrier();
+
+	ops->read_entry_dma(qdev->dev, &dma);
+}
+
+void qfw_read_entry(struct udevice *dev, u16 entry, u32 size, void *address)
+{
+	struct qfw_dev *qdev = dev_get_uclass_priv(dev);
+
+	if (qdev->dma_present)
+		qfw_read_entry_dma(qdev, entry, size, address);
+	else
+		qfw_read_entry_io(qdev, entry, size, address);
+}
+
+int qfw_register(struct udevice *dev)
+{
+	struct qfw_dev *qdev = dev_get_uclass_priv(dev);
+	u32 qemu, dma_enabled;
+
+	qdev->dev = dev;
+	INIT_LIST_HEAD(&qdev->fw_list);
+
+	qfw_read_entry_io(qdev, FW_CFG_SIGNATURE, 4, &qemu);
+	if (be32_to_cpu(qemu) != QEMU_FW_CFG_SIGNATURE)
+		return -ENODEV;
+
+	qfw_read_entry_io(qdev, FW_CFG_ID, 1, &dma_enabled);
+	if (dma_enabled & FW_CFG_DMA_ENABLED)
+		qdev->dma_present = true;
+
+	return 0;
+}
+
+UCLASS_DRIVER(qfw) = {
+	.id		= UCLASS_QFW,
+	.name		= "qfw",
+	.per_device_auto	= sizeof(struct qfw_dev),
+};