acpi: carve out qfw_acpi.c
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>
diff --git a/drivers/misc/qfw_acpi.c b/drivers/misc/qfw_acpi.c
new file mode 100644
index 0000000..6e14b2a
--- /dev/null
+++ b/drivers/misc/qfw_acpi.c
@@ -0,0 +1,256 @@
+// 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 <acpi/acpi_table.h>
+#include <errno.h>
+#include <malloc.h>
+#include <qfw.h>
+#include <tables_csum.h>
+#include <stdio.h>
+#include <asm/byteorder.h>
+#include <asm/global_data.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+/*
+ * 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;
+ }
+ if (aligned_addr < gd->arch.table_start_high)
+ gd->arch.table_start_high = aligned_addr;
+ if (aligned_addr + size > gd->arch.table_end_high)
+ gd->arch.table_end_high = aligned_addr + size;
+
+ } 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 always puts tables at high addresses */
+ gd->arch.table_start_high = (ulong)table_loader;
+ gd->arch.table_end_high = (ulong)table_loader;
+
+ 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);
+
+ gd_set_acpi_start(acpi_get_rsdp_addr());
+
+ 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;
+}