- Move the command portion of arch/x86/cpu/qemu/fw_cfg.c into cmd/qemu_fw_cfg.c - Move arch/x86/include/asm/fw_cfg.h to include/qemu_fw_cfg.h - Rename ACPI table portion to arch/x86/cpu/qemu/acpi_table.c
Signed-off-by: Tom Rini trini@konsulko.com --- Changes in v2: - Depend on X86 (per Miao Yan) --- arch/x86/cpu/mp_init.c | 2 +- arch/x86/cpu/qemu/Makefile | 3 +- arch/x86/cpu/qemu/acpi_table.c | 243 ++++++++++++++++++ arch/x86/cpu/qemu/cpu.c | 2 +- arch/x86/cpu/qemu/fw_cfg.c | 570 ----------------------------------------- arch/x86/cpu/qemu/qemu.c | 2 +- arch/x86/include/asm/fw_cfg.h | 157 ------------ arch/x86/lib/acpi_table.c | 2 +- cmd/Kconfig | 7 + cmd/Makefile | 1 + cmd/qemu_fw_cfg.c | 343 +++++++++++++++++++++++++ configs/qemu-x86_defconfig | 1 + include/qemu_fw_cfg.h | 162 ++++++++++++ 13 files changed, 763 insertions(+), 732 deletions(-) create mode 100644 arch/x86/cpu/qemu/acpi_table.c delete mode 100644 arch/x86/cpu/qemu/fw_cfg.c delete mode 100644 arch/x86/include/asm/fw_cfg.h create mode 100644 cmd/qemu_fw_cfg.c create mode 100644 include/qemu_fw_cfg.h
diff --git a/arch/x86/cpu/mp_init.c b/arch/x86/cpu/mp_init.c index 2604a68..13bec7a 100644 --- a/arch/x86/cpu/mp_init.c +++ b/arch/x86/cpu/mp_init.c @@ -11,6 +11,7 @@ #include <dm.h> #include <errno.h> #include <malloc.h> +#include <qemu_fw_cfg.h> #include <asm/atomic.h> #include <asm/cpu.h> #include <asm/interrupt.h> @@ -21,7 +22,6 @@ #include <asm/mtrr.h> #include <asm/processor.h> #include <asm/sipi.h> -#include <asm/fw_cfg.h> #include <dm/device-internal.h> #include <dm/uclass-internal.h> #include <dm/lists.h> diff --git a/arch/x86/cpu/qemu/Makefile b/arch/x86/cpu/qemu/Makefile index 6eeddf1..97b965c 100644 --- a/arch/x86/cpu/qemu/Makefile +++ b/arch/x86/cpu/qemu/Makefile @@ -7,4 +7,5 @@ ifndef CONFIG_EFI_STUB obj-y += car.o dram.o endif -obj-y += cpu.o fw_cfg.o qemu.o +obj-y += cpu.o qemu.o +obj-$(CONFIG_QEMU_ACPI_TABLE) += acpi_table.o diff --git a/arch/x86/cpu/qemu/acpi_table.c b/arch/x86/cpu/qemu/acpi_table.c new file mode 100644 index 0000000..49381ac --- /dev/null +++ b/arch/x86/cpu/qemu/acpi_table.c @@ -0,0 +1,243 @@ +/* + * (C) Copyright 2015 Miao Yan yanmiaobest@gmail.com + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <command.h> +#include <errno.h> +#include <malloc.h> +#include <qemu_fw_cfg.h> +#include <asm/io.h> +#include <asm/tables.h> +#include <asm/e820.h> +#include <linux/list.h> +#include <memalign.h> + +/* + * 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 bios_linker_entry *entry, u32 *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 = qemu_fwcfg_find_file(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); + + qemu_fwcfg_read_entry(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 bios_linker_entry *entry) +{ + struct fw_file *dest, *src; + uint32_t offset = le32_to_cpu(entry->pointer.offset); + uint64_t pointer = 0; + + dest = qemu_fwcfg_find_file(entry->pointer.dest_file); + if (!dest || !dest->addr) + return -ENOENT; + src = qemu_fwcfg_find_file(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 bios_linker_entry *entry) +{ + struct fw_file *file; + uint8_t *data, cksum = 0; + uint8_t *cksum_start; + + file = qemu_fwcfg_find_file(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; +} + +unsigned install_e820_map(unsigned max_entries, struct e820entry *entries) +{ + entries[0].addr = 0; + entries[0].size = ISA_START_ADDRESS; + entries[0].type = E820_RAM; + + entries[1].addr = ISA_START_ADDRESS; + entries[1].size = ISA_END_ADDRESS - ISA_START_ADDRESS; + entries[1].type = E820_RESERVED; + + /* + * since we use memalign(malloc) to allocate high memory for + * storing ACPI tables, we need to reserve them in e820 tables, + * otherwise kernel will reclaim them and data will be corrupted + */ + entries[2].addr = ISA_END_ADDRESS; + entries[2].size = gd->relocaddr - TOTAL_MALLOC_LEN - ISA_END_ADDRESS; + entries[2].type = E820_RAM; + + /* for simplicity, reserve entire malloc space */ + entries[3].addr = gd->relocaddr - TOTAL_MALLOC_LEN; + entries[3].size = TOTAL_MALLOC_LEN; + entries[3].type = E820_RESERVED; + + entries[4].addr = gd->relocaddr; + entries[4].size = gd->ram_size - gd->relocaddr; + entries[4].type = E820_RESERVED; + + entries[5].addr = CONFIG_PCIE_ECAM_BASE; + entries[5].size = CONFIG_PCIE_ECAM_SIZE; + entries[5].type = E820_RESERVED; + + return 6; +} + +/* This function loads and patches ACPI tables provided by QEMU */ +u32 write_acpi_tables(u32 addr) +{ + int i, ret = 0; + struct fw_file *file; + struct bios_linker_entry *table_loader; + struct bios_linker_entry *entry; + uint32_t size; + + /* make sure fw_list is loaded */ + ret = qemu_fwcfg_read_firmware_list(); + if (ret) { + printf("error: can't read firmware file list\n"); + return addr; + } + + file = qemu_fwcfg_find_file("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; + } + + qemu_fwcfg_read_entry(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(entry, &addr); + if (ret) + goto out; + break; + case BIOS_LINKER_LOADER_COMMAND_ADD_POINTER: + ret = bios_linker_add_pointer(entry); + if (ret) + goto out; + break; + case BIOS_LINKER_LOADER_COMMAND_ADD_CHECKSUM: + ret = bios_linker_add_checksum(entry); + if (ret) + goto out; + break; + default: + break; + } + } + +out: + if (ret) + qemu_fwcfg_free_files(); + + free(table_loader); + return addr; +} diff --git a/arch/x86/cpu/qemu/cpu.c b/arch/x86/cpu/qemu/cpu.c index a1b70c6..4d2989a 100644 --- a/arch/x86/cpu/qemu/cpu.c +++ b/arch/x86/cpu/qemu/cpu.c @@ -8,8 +8,8 @@ #include <cpu.h> #include <dm.h> #include <errno.h> +#include <qemu_fw_cfg.h> #include <asm/cpu.h> -#include <asm/fw_cfg.h>
DECLARE_GLOBAL_DATA_PTR;
diff --git a/arch/x86/cpu/qemu/fw_cfg.c b/arch/x86/cpu/qemu/fw_cfg.c deleted file mode 100644 index 2e2794e..0000000 --- a/arch/x86/cpu/qemu/fw_cfg.c +++ /dev/null @@ -1,570 +0,0 @@ -/* - * (C) Copyright 2015 Miao Yan yanmiaobest@gmail.com - * - * SPDX-License-Identifier: GPL-2.0+ - */ - -#include <common.h> -#include <command.h> -#include <errno.h> -#include <malloc.h> -#include <asm/io.h> -#include <asm/fw_cfg.h> -#include <asm/tables.h> -#include <asm/e820.h> -#include <linux/list.h> -#include <memalign.h> - -static bool fwcfg_present; -static bool fwcfg_dma_present; - -static LIST_HEAD(fw_list); - -/* Read configuration item using fw_cfg PIO interface */ -static void qemu_fwcfg_read_entry_pio(uint16_t entry, - uint32_t size, void *address) -{ - uint32_t i = 0; - uint8_t *data = address; - - /* - * writting FW_CFG_INVALID will cause read operation to resume at - * last offset, otherwise read will start at offset 0 - */ - if (entry != FW_CFG_INVALID) - outw(entry, FW_CONTROL_PORT); - while (size--) - data[i++] = inb(FW_DATA_PORT); -} - -/* Read configuration item using fw_cfg DMA interface */ -static void qemu_fwcfg_read_entry_dma(uint16_t entry, - uint32_t size, void *address) -{ - struct fw_cfg_dma_access dma; - - dma.length = cpu_to_be32(size); - dma.address = cpu_to_be64((uintptr_t)address); - dma.control = cpu_to_be32(FW_CFG_DMA_READ); - - /* - * writting 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)); - - barrier(); - - debug("qemu_fwcfg_dma_read_entry: addr %p, length %u control 0x%x\n", - address, size, be32_to_cpu(dma.control)); - - outl(cpu_to_be32((uint32_t)&dma), FW_DMA_PORT_HIGH); - - while (be32_to_cpu(dma.control) & ~FW_CFG_DMA_ERROR) - __asm__ __volatile__ ("pause"); -} - -static bool qemu_fwcfg_present(void) -{ - uint32_t qemu; - - qemu_fwcfg_read_entry_pio(FW_CFG_SIGNATURE, 4, &qemu); - return be32_to_cpu(qemu) == QEMU_FW_CFG_SIGNATURE; -} - -static bool qemu_fwcfg_dma_present(void) -{ - uint8_t dma_enabled; - - qemu_fwcfg_read_entry_pio(FW_CFG_ID, 1, &dma_enabled); - if (dma_enabled & FW_CFG_DMA_ENABLED) - return true; - - return false; -} - -static void qemu_fwcfg_read_entry(uint16_t entry, - uint32_t length, void *address) -{ - if (fwcfg_dma_present) - qemu_fwcfg_read_entry_dma(entry, length, address); - else - qemu_fwcfg_read_entry_pio(entry, length, address); -} - -int qemu_fwcfg_online_cpus(void) -{ - uint16_t nb_cpus; - - if (!fwcfg_present) - return -ENODEV; - - qemu_fwcfg_read_entry(FW_CFG_NB_CPUS, 2, &nb_cpus); - - return le16_to_cpu(nb_cpus); -} - -/* - * This function prepares kernel for zboot. It loads kernel data - * to 'load_addr', initrd to 'initrd_addr' and kernel command - * line using qemu fw_cfg interface. - */ -static int qemu_fwcfg_setup_kernel(void *load_addr, void *initrd_addr) -{ - char *data_addr; - uint32_t setup_size, kernel_size, cmdline_size, initrd_size; - - qemu_fwcfg_read_entry(FW_CFG_SETUP_SIZE, 4, &setup_size); - qemu_fwcfg_read_entry(FW_CFG_KERNEL_SIZE, 4, &kernel_size); - - if (setup_size == 0 || kernel_size == 0) { - printf("warning: no kernel available\n"); - return -1; - } - - data_addr = load_addr; - qemu_fwcfg_read_entry(FW_CFG_SETUP_DATA, - le32_to_cpu(setup_size), data_addr); - data_addr += le32_to_cpu(setup_size); - - qemu_fwcfg_read_entry(FW_CFG_KERNEL_DATA, - le32_to_cpu(kernel_size), data_addr); - data_addr += le32_to_cpu(kernel_size); - - data_addr = initrd_addr; - qemu_fwcfg_read_entry(FW_CFG_INITRD_SIZE, 4, &initrd_size); - if (initrd_size == 0) { - printf("warning: no initrd available\n"); - } else { - qemu_fwcfg_read_entry(FW_CFG_INITRD_DATA, - le32_to_cpu(initrd_size), data_addr); - data_addr += le32_to_cpu(initrd_size); - } - - qemu_fwcfg_read_entry(FW_CFG_CMDLINE_SIZE, 4, &cmdline_size); - if (cmdline_size) { - qemu_fwcfg_read_entry(FW_CFG_CMDLINE_DATA, - le32_to_cpu(cmdline_size), data_addr); - /* - * if kernel cmdline only contains '\0', (e.g. no -append - * when invoking qemu), do not update bootargs - */ - if (*data_addr != '\0') { - if (setenv("bootargs", data_addr) < 0) - printf("warning: unable to change bootargs\n"); - } - } - - printf("loading kernel to address %p size %x", load_addr, - le32_to_cpu(kernel_size)); - if (initrd_size) - printf(" initrd %p size %x\n", - initrd_addr, - le32_to_cpu(initrd_size)); - else - printf("\n"); - - return 0; -} - -static int qemu_fwcfg_read_firmware_list(void) -{ - int i; - uint32_t count; - struct fw_file *file; - struct list_head *entry; - - /* don't read it twice */ - if (!list_empty(&fw_list)) - return 0; - - qemu_fwcfg_read_entry(FW_CFG_FILE_DIR, 4, &count); - if (!count) - return 0; - - count = be32_to_cpu(count); - for (i = 0; i < count; i++) { - file = malloc(sizeof(*file)); - if (!file) { - printf("error: allocating resource\n"); - goto err; - } - qemu_fwcfg_read_entry(FW_CFG_INVALID, - sizeof(struct fw_cfg_file), &file->cfg); - file->addr = 0; - list_add_tail(&file->list, &fw_list); - } - - return 0; - -err: - list_for_each(entry, &fw_list) { - file = list_entry(entry, struct fw_file, list); - free(file); - } - - return -ENOMEM; -} - -#ifdef CONFIG_QEMU_ACPI_TABLE -static struct fw_file *qemu_fwcfg_find_file(const char *name) -{ - struct list_head *entry; - struct fw_file *file; - - list_for_each(entry, &fw_list) { - file = list_entry(entry, struct fw_file, list); - if (!strcmp(file->cfg.name, name)) - return file; - } - - return NULL; -} - -/* - * 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 bios_linker_entry *entry, u32 *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 = qemu_fwcfg_find_file(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); - - qemu_fwcfg_read_entry(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 bios_linker_entry *entry) -{ - struct fw_file *dest, *src; - uint32_t offset = le32_to_cpu(entry->pointer.offset); - uint64_t pointer = 0; - - dest = qemu_fwcfg_find_file(entry->pointer.dest_file); - if (!dest || !dest->addr) - return -ENOENT; - src = qemu_fwcfg_find_file(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 bios_linker_entry *entry) -{ - struct fw_file *file; - uint8_t *data, cksum = 0; - uint8_t *cksum_start; - - file = qemu_fwcfg_find_file(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; -} - -unsigned install_e820_map(unsigned max_entries, struct e820entry *entries) -{ - entries[0].addr = 0; - entries[0].size = ISA_START_ADDRESS; - entries[0].type = E820_RAM; - - entries[1].addr = ISA_START_ADDRESS; - entries[1].size = ISA_END_ADDRESS - ISA_START_ADDRESS; - entries[1].type = E820_RESERVED; - - /* - * since we use memalign(malloc) to allocate high memory for - * storing ACPI tables, we need to reserve them in e820 tables, - * otherwise kernel will reclaim them and data will be corrupted - */ - entries[2].addr = ISA_END_ADDRESS; - entries[2].size = gd->relocaddr - TOTAL_MALLOC_LEN - ISA_END_ADDRESS; - entries[2].type = E820_RAM; - - /* for simplicity, reserve entire malloc space */ - entries[3].addr = gd->relocaddr - TOTAL_MALLOC_LEN; - entries[3].size = TOTAL_MALLOC_LEN; - entries[3].type = E820_RESERVED; - - entries[4].addr = gd->relocaddr; - entries[4].size = gd->ram_size - gd->relocaddr; - entries[4].type = E820_RESERVED; - - entries[5].addr = CONFIG_PCIE_ECAM_BASE; - entries[5].size = CONFIG_PCIE_ECAM_SIZE; - entries[5].type = E820_RESERVED; - - return 6; -} - -/* This function loads and patches ACPI tables provided by QEMU */ -u32 write_acpi_tables(u32 addr) -{ - int i, ret = 0; - struct fw_file *file; - struct bios_linker_entry *table_loader; - struct bios_linker_entry *entry; - uint32_t size; - struct list_head *list; - - /* make sure fw_list is loaded */ - ret = qemu_fwcfg_read_firmware_list(); - if (ret) { - printf("error: can't read firmware file list\n"); - return addr; - } - - file = qemu_fwcfg_find_file("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; - } - - qemu_fwcfg_read_entry(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(entry, &addr); - if (ret) - goto out; - break; - case BIOS_LINKER_LOADER_COMMAND_ADD_POINTER: - ret = bios_linker_add_pointer(entry); - if (ret) - goto out; - break; - case BIOS_LINKER_LOADER_COMMAND_ADD_CHECKSUM: - ret = bios_linker_add_checksum(entry); - if (ret) - goto out; - break; - default: - break; - } - } - -out: - if (ret) { - list_for_each(list, &fw_list) { - file = list_entry(list, struct fw_file, list); - if (file->addr) - free((void *)file->addr); - } - } - - free(table_loader); - return addr; -} -#endif - -static int qemu_fwcfg_list_firmware(void) -{ - int ret; - struct list_head *entry; - struct fw_file *file; - - /* make sure fw_list is loaded */ - ret = qemu_fwcfg_read_firmware_list(); - if (ret) - return ret; - - list_for_each(entry, &fw_list) { - file = list_entry(entry, struct fw_file, list); - printf("%-56s\n", file->cfg.name); - } - - return 0; -} - -void qemu_fwcfg_init(void) -{ - fwcfg_present = qemu_fwcfg_present(); - if (fwcfg_present) - fwcfg_dma_present = qemu_fwcfg_dma_present(); -} - -static int qemu_fwcfg_do_list(cmd_tbl_t *cmdtp, int flag, - int argc, char * const argv[]) -{ - if (qemu_fwcfg_list_firmware() < 0) - return CMD_RET_FAILURE; - - return 0; -} - -static int qemu_fwcfg_do_cpus(cmd_tbl_t *cmdtp, int flag, - int argc, char * const argv[]) -{ - int ret = qemu_fwcfg_online_cpus(); - if (ret < 0) { - printf("QEMU fw_cfg interface not found\n"); - return CMD_RET_FAILURE; - } - - printf("%d cpu(s) online\n", qemu_fwcfg_online_cpus()); - - return 0; -} - -static int qemu_fwcfg_do_load(cmd_tbl_t *cmdtp, int flag, - int argc, char * const argv[]) -{ - char *env; - void *load_addr; - void *initrd_addr; - - env = getenv("loadaddr"); - load_addr = env ? - (void *)simple_strtoul(env, NULL, 16) : - (void *)CONFIG_LOADADDR; - - env = getenv("ramdiskaddr"); - initrd_addr = env ? - (void *)simple_strtoul(env, NULL, 16) : - (void *)CONFIG_RAMDISK_ADDR; - - if (argc == 2) { - load_addr = (void *)simple_strtoul(argv[0], NULL, 16); - initrd_addr = (void *)simple_strtoul(argv[1], NULL, 16); - } else if (argc == 1) { - load_addr = (void *)simple_strtoul(argv[0], NULL, 16); - } - - return qemu_fwcfg_setup_kernel(load_addr, initrd_addr); -} - -static cmd_tbl_t fwcfg_commands[] = { - U_BOOT_CMD_MKENT(list, 0, 1, qemu_fwcfg_do_list, "", ""), - U_BOOT_CMD_MKENT(cpus, 0, 1, qemu_fwcfg_do_cpus, "", ""), - U_BOOT_CMD_MKENT(load, 2, 1, qemu_fwcfg_do_load, "", ""), -}; - -static int do_qemu_fw(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) -{ - int ret; - cmd_tbl_t *fwcfg_cmd; - - if (!fwcfg_present) { - printf("QEMU fw_cfg interface not found\n"); - return CMD_RET_USAGE; - } - - fwcfg_cmd = find_cmd_tbl(argv[1], fwcfg_commands, - ARRAY_SIZE(fwcfg_commands)); - argc -= 2; - argv += 2; - if (!fwcfg_cmd || argc > fwcfg_cmd->maxargs) - return CMD_RET_USAGE; - - ret = fwcfg_cmd->cmd(fwcfg_cmd, flag, argc, argv); - - return cmd_process_error(fwcfg_cmd, ret); -} - -U_BOOT_CMD( - qfw, 4, 1, do_qemu_fw, - "QEMU firmware interface", - "<command>\n" - " - list : print firmware(s) currently loaded\n" - " - cpus : print online cpu number\n" - " - load <kernel addr> <initrd addr> : load kernel and initrd (if any), and setup for zboot\n" -) diff --git a/arch/x86/cpu/qemu/qemu.c b/arch/x86/cpu/qemu/qemu.c index 7ad0ee4..b41e4ec 100644 --- a/arch/x86/cpu/qemu/qemu.c +++ b/arch/x86/cpu/qemu/qemu.c @@ -6,12 +6,12 @@
#include <common.h> #include <pci.h> +#include <qemu_fw_cfg.h> #include <asm/irq.h> #include <asm/post.h> #include <asm/processor.h> #include <asm/arch/device.h> #include <asm/arch/qemu.h> -#include <asm/fw_cfg.h>
static bool i440fx;
diff --git a/arch/x86/include/asm/fw_cfg.h b/arch/x86/include/asm/fw_cfg.h deleted file mode 100644 index e9450c6..0000000 --- a/arch/x86/include/asm/fw_cfg.h +++ /dev/null @@ -1,157 +0,0 @@ -/* - * (C) Copyright 2015 Miao Yan yanmiaobest@gmail.com - * - * SPDX-License-Identifier: GPL-2.0+ - */ - -#ifndef __FW_CFG__ -#define __FW_CFG__ - -#define FW_CONTROL_PORT 0x510 -#define FW_DATA_PORT 0x511 -#define FW_DMA_PORT_LOW 0x514 -#define FW_DMA_PORT_HIGH 0x518 - -#include <linux/list.h> - -enum qemu_fwcfg_items { - FW_CFG_SIGNATURE = 0x00, - FW_CFG_ID = 0x01, - FW_CFG_UUID = 0x02, - FW_CFG_RAM_SIZE = 0x03, - FW_CFG_NOGRAPHIC = 0x04, - FW_CFG_NB_CPUS = 0x05, - FW_CFG_MACHINE_ID = 0x06, - FW_CFG_KERNEL_ADDR = 0x07, - FW_CFG_KERNEL_SIZE = 0x08, - FW_CFG_KERNEL_CMDLINE = 0x09, - FW_CFG_INITRD_ADDR = 0x0a, - FW_CFG_INITRD_SIZE = 0x0b, - FW_CFG_BOOT_DEVICE = 0x0c, - FW_CFG_NUMA = 0x0d, - FW_CFG_BOOT_MENU = 0x0e, - FW_CFG_MAX_CPUS = 0x0f, - FW_CFG_KERNEL_ENTRY = 0x10, - FW_CFG_KERNEL_DATA = 0x11, - FW_CFG_INITRD_DATA = 0x12, - FW_CFG_CMDLINE_ADDR = 0x13, - FW_CFG_CMDLINE_SIZE = 0x14, - FW_CFG_CMDLINE_DATA = 0x15, - FW_CFG_SETUP_ADDR = 0x16, - FW_CFG_SETUP_SIZE = 0x17, - FW_CFG_SETUP_DATA = 0x18, - FW_CFG_FILE_DIR = 0x19, - FW_CFG_FILE_FIRST = 0x20, - FW_CFG_WRITE_CHANNEL = 0x4000, - FW_CFG_ARCH_LOCAL = 0x8000, - FW_CFG_INVALID = 0xffff, -}; - -enum { - BIOS_LINKER_LOADER_COMMAND_ALLOCATE = 0x1, - BIOS_LINKER_LOADER_COMMAND_ADD_POINTER = 0x2, - BIOS_LINKER_LOADER_COMMAND_ADD_CHECKSUM = 0x3, -}; - -enum { - BIOS_LINKER_LOADER_ALLOC_ZONE_HIGH = 0x1, - BIOS_LINKER_LOADER_ALLOC_ZONE_FSEG = 0x2, -}; - -#define FW_CFG_FILE_SLOTS 0x10 -#define FW_CFG_MAX_ENTRY (FW_CFG_FILE_FIRST + FW_CFG_FILE_SLOTS) -#define FW_CFG_ENTRY_MASK ~(FW_CFG_WRITE_CHANNEL | FW_CFG_ARCH_LOCAL) - -#define FW_CFG_MAX_FILE_PATH 56 -#define BIOS_LINKER_LOADER_FILESZ FW_CFG_MAX_FILE_PATH - -#define QEMU_FW_CFG_SIGNATURE (('Q' << 24) | ('E' << 16) | ('M' << 8) | 'U') - -#define FW_CFG_DMA_ERROR (1 << 0) -#define FW_CFG_DMA_READ (1 << 1) -#define FW_CFG_DMA_SKIP (1 << 2) -#define FW_CFG_DMA_SELECT (1 << 3) - -#define FW_CFG_DMA_ENABLED (1 << 1) - -struct fw_cfg_file { - __be32 size; - __be16 select; - __be16 reserved; - char name[FW_CFG_MAX_FILE_PATH]; -}; - -struct fw_file { - struct fw_cfg_file cfg; /* firmware file information */ - unsigned long addr; /* firmware file in-memory address */ - struct list_head list; /* list node to link to fw_list */ -}; - -struct fw_cfg_dma_access { - __be32 control; - __be32 length; - __be64 address; -}; - -struct bios_linker_entry { - __le32 command; - union { - /* - * COMMAND_ALLOCATE - allocate a table from @alloc.file - * subject to @alloc.align alignment (must be power of 2) - * and @alloc.zone (can be HIGH or FSEG) requirements. - * - * Must appear exactly once for each file, and before - * this file is referenced by any other command. - */ - struct { - char file[BIOS_LINKER_LOADER_FILESZ]; - __le32 align; - uint8_t zone; - } alloc; - - /* - * COMMAND_ADD_POINTER - patch the table (originating from - * @dest_file) at @pointer.offset, by adding a pointer to the - * table originating from @src_file. 1,2,4 or 8 byte unsigned - * addition is used depending on @pointer.size. - */ - struct { - char dest_file[BIOS_LINKER_LOADER_FILESZ]; - char src_file[BIOS_LINKER_LOADER_FILESZ]; - __le32 offset; - uint8_t size; - } pointer; - - /* - * COMMAND_ADD_CHECKSUM - calculate checksum of the range - * specified by @cksum_start and @cksum_length fields, - * and then add the value at @cksum.offset. - * Checksum simply sums -X for each byte X in the range - * using 8-bit math. - */ - struct { - char file[BIOS_LINKER_LOADER_FILESZ]; - __le32 offset; - __le32 start; - __le32 length; - } cksum; - - /* padding */ - char pad[124]; - }; -} __packed; - -/** - * Initialize QEMU fw_cfg interface - */ -void qemu_fwcfg_init(void); - -/** - * Get system cpu number - * - * @return: cpu number in system - */ -int qemu_fwcfg_online_cpus(void); - -#endif diff --git a/arch/x86/lib/acpi_table.c b/arch/x86/lib/acpi_table.c index 790f6fb..bb4139a 100644 --- a/arch/x86/lib/acpi_table.c +++ b/arch/x86/lib/acpi_table.c @@ -333,7 +333,7 @@ static void acpi_create_ssdt_generator(acpi_header_t *ssdt,
/* * QEMU's version of write_acpi_tables is defined in - * arch/x86/cpu/qemu/fw_cfg.c + * arch/x86/cpu/qemu/acpi_table.c */ u32 write_acpi_tables(u32 start) { diff --git a/cmd/Kconfig b/cmd/Kconfig index 9336752..c0fffe3 100644 --- a/cmd/Kconfig +++ b/cmd/Kconfig @@ -593,6 +593,13 @@ config CMD_SOUND sound init - set up sound system sound play - play a sound
+config CMD_QEMU_FW_CFG + bool "qfw" + depends on X86 + help + This provides access to the QEMU firmware interface. The main + feature is to allow easy loading of files passed to qemu-system + via -kernel / -initrd endmenu
config CMD_BOOTSTAGE diff --git a/cmd/Makefile b/cmd/Makefile index f95759e..f99e67d 100644 --- a/cmd/Makefile +++ b/cmd/Makefile @@ -105,6 +105,7 @@ endif obj-y += pcmcia.o obj-$(CONFIG_CMD_PORTIO) += portio.o obj-$(CONFIG_CMD_PXE) += pxe.o +obj-$(CONFIG_CMD_QEMU_FW_CFG) += qemu_fw_cfg.o obj-$(CONFIG_CMD_READ) += read.o obj-$(CONFIG_CMD_REGINFO) += reginfo.o obj-$(CONFIG_CMD_REISER) += reiser.o diff --git a/cmd/qemu_fw_cfg.c b/cmd/qemu_fw_cfg.c new file mode 100644 index 0000000..48ae476 --- /dev/null +++ b/cmd/qemu_fw_cfg.c @@ -0,0 +1,343 @@ +/* + * (C) Copyright 2015 Miao Yan yanmiaobest@gmail.com + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <command.h> +#include <errno.h> +#include <malloc.h> +#include <qemu_fw_cfg.h> +#include <asm/io.h> +#include <linux/list.h> + +static bool fwcfg_present; +static bool fwcfg_dma_present; + +static LIST_HEAD(fw_list); + +/* Read configuration item using fw_cfg PIO interface */ +static void qemu_fwcfg_read_entry_pio(uint16_t entry, + uint32_t size, void *address) +{ + uint32_t i = 0; + uint8_t *data = address; + + /* + * writting FW_CFG_INVALID will cause read operation to resume at + * last offset, otherwise read will start at offset 0 + */ + if (entry != FW_CFG_INVALID) + outw(entry, FW_CONTROL_PORT); + while (size--) + data[i++] = inb(FW_DATA_PORT); +} + +/* Read configuration item using fw_cfg DMA interface */ +static void qemu_fwcfg_read_entry_dma(uint16_t entry, + uint32_t size, void *address) +{ + struct fw_cfg_dma_access dma; + + dma.length = cpu_to_be32(size); + dma.address = cpu_to_be64((uintptr_t)address); + dma.control = cpu_to_be32(FW_CFG_DMA_READ); + + /* + * writting 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)); + + barrier(); + + debug("qemu_fwcfg_dma_read_entry: addr %p, length %u control 0x%x\n", + address, size, be32_to_cpu(dma.control)); + + outl(cpu_to_be32((uint32_t)&dma), FW_DMA_PORT_HIGH); + + while (be32_to_cpu(dma.control) & ~FW_CFG_DMA_ERROR) + __asm__ __volatile__ ("pause"); +} + +static bool qemu_fwcfg_present(void) +{ + uint32_t qemu; + + qemu_fwcfg_read_entry_pio(FW_CFG_SIGNATURE, 4, &qemu); + return be32_to_cpu(qemu) == QEMU_FW_CFG_SIGNATURE; +} + +static bool qemu_fwcfg_dma_present(void) +{ + uint8_t dma_enabled; + + qemu_fwcfg_read_entry_pio(FW_CFG_ID, 1, &dma_enabled); + if (dma_enabled & FW_CFG_DMA_ENABLED) + return true; + + return false; +} + +void qemu_fwcfg_read_entry(uint16_t entry, uint32_t length, void *address) +{ + if (fwcfg_dma_present) + qemu_fwcfg_read_entry_dma(entry, length, address); + else + qemu_fwcfg_read_entry_pio(entry, length, address); +} + +int qemu_fwcfg_online_cpus(void) +{ + uint16_t nb_cpus; + + if (!fwcfg_present) + return -ENODEV; + + qemu_fwcfg_read_entry(FW_CFG_NB_CPUS, 2, &nb_cpus); + + return le16_to_cpu(nb_cpus); +} + +/* + * This function prepares kernel for zboot. It loads kernel data + * to 'load_addr', initrd to 'initrd_addr' and kernel command + * line using qemu fw_cfg interface. + */ +static int qemu_fwcfg_setup_kernel(void *load_addr, void *initrd_addr) +{ + char *data_addr; + uint32_t setup_size, kernel_size, cmdline_size, initrd_size; + + qemu_fwcfg_read_entry(FW_CFG_SETUP_SIZE, 4, &setup_size); + qemu_fwcfg_read_entry(FW_CFG_KERNEL_SIZE, 4, &kernel_size); + + if (setup_size == 0 || kernel_size == 0) { + printf("warning: no kernel available\n"); + return -1; + } + + data_addr = load_addr; + qemu_fwcfg_read_entry(FW_CFG_SETUP_DATA, + le32_to_cpu(setup_size), data_addr); + data_addr += le32_to_cpu(setup_size); + + qemu_fwcfg_read_entry(FW_CFG_KERNEL_DATA, + le32_to_cpu(kernel_size), data_addr); + data_addr += le32_to_cpu(kernel_size); + + data_addr = initrd_addr; + qemu_fwcfg_read_entry(FW_CFG_INITRD_SIZE, 4, &initrd_size); + if (initrd_size == 0) { + printf("warning: no initrd available\n"); + } else { + qemu_fwcfg_read_entry(FW_CFG_INITRD_DATA, + le32_to_cpu(initrd_size), data_addr); + data_addr += le32_to_cpu(initrd_size); + } + + qemu_fwcfg_read_entry(FW_CFG_CMDLINE_SIZE, 4, &cmdline_size); + if (cmdline_size) { + qemu_fwcfg_read_entry(FW_CFG_CMDLINE_DATA, + le32_to_cpu(cmdline_size), data_addr); + /* + * if kernel cmdline only contains '\0', (e.g. no -append + * when invoking qemu), do not update bootargs + */ + if (*data_addr != '\0') { + if (setenv("bootargs", data_addr) < 0) + printf("warning: unable to change bootargs\n"); + } + } + + printf("loading kernel to address %p size %x", load_addr, + le32_to_cpu(kernel_size)); + if (initrd_size) + printf(" initrd %p size %x\n", + initrd_addr, + le32_to_cpu(initrd_size)); + else + printf("\n"); + + return 0; +} + +int qemu_fwcfg_read_firmware_list(void) +{ + int i; + uint32_t count; + struct fw_file *file; + struct list_head *entry; + + /* don't read it twice */ + if (!list_empty(&fw_list)) + return 0; + + qemu_fwcfg_read_entry(FW_CFG_FILE_DIR, 4, &count); + if (!count) + return 0; + + count = be32_to_cpu(count); + for (i = 0; i < count; i++) { + file = malloc(sizeof(*file)); + if (!file) { + printf("error: allocating resource\n"); + goto err; + } + qemu_fwcfg_read_entry(FW_CFG_INVALID, + sizeof(struct fw_cfg_file), &file->cfg); + file->addr = 0; + list_add_tail(&file->list, &fw_list); + } + + return 0; + +err: + list_for_each(entry, &fw_list) { + file = list_entry(entry, struct fw_file, list); + free(file); + } + + return -ENOMEM; +} + +struct fw_file *qemu_fwcfg_find_file(const char *name) +{ + struct list_head *entry; + struct fw_file *file; + + list_for_each(entry, &fw_list) { + file = list_entry(entry, struct fw_file, list); + if (!strcmp(file->cfg.name, name)) + return file; + } + + return NULL; +} + +void qemu_fwcfg_free_files(void) +{ + struct fw_file *file; + struct list_head *list; + + list_for_each(list, &fw_list) { + file = list_entry(list, struct fw_file, list); + if (file->addr) + free((void *)file->addr); + } +} + +static int qemu_fwcfg_list_firmware(void) +{ + int ret; + struct list_head *entry; + struct fw_file *file; + + /* make sure fw_list is loaded */ + ret = qemu_fwcfg_read_firmware_list(); + if (ret) + return ret; + + list_for_each(entry, &fw_list) { + file = list_entry(entry, struct fw_file, list); + printf("%-56s\n", file->cfg.name); + } + + return 0; +} + +void qemu_fwcfg_init(void) +{ + fwcfg_present = qemu_fwcfg_present(); + if (fwcfg_present) + fwcfg_dma_present = qemu_fwcfg_dma_present(); +} + +static int qemu_fwcfg_do_list(cmd_tbl_t *cmdtp, int flag, + int argc, char * const argv[]) +{ + if (qemu_fwcfg_list_firmware() < 0) + return CMD_RET_FAILURE; + + return 0; +} + +static int qemu_fwcfg_do_cpus(cmd_tbl_t *cmdtp, int flag, + int argc, char * const argv[]) +{ + int ret = qemu_fwcfg_online_cpus(); + if (ret < 0) { + printf("QEMU fw_cfg interface not found\n"); + return CMD_RET_FAILURE; + } + + printf("%d cpu(s) online\n", qemu_fwcfg_online_cpus()); + + return 0; +} + +static int qemu_fwcfg_do_load(cmd_tbl_t *cmdtp, int flag, + int argc, char * const argv[]) +{ + char *env; + void *load_addr; + void *initrd_addr; + + env = getenv("loadaddr"); + load_addr = env ? + (void *)simple_strtoul(env, NULL, 16) : + (void *)CONFIG_LOADADDR; + + env = getenv("ramdiskaddr"); + initrd_addr = env ? + (void *)simple_strtoul(env, NULL, 16) : + (void *)CONFIG_RAMDISK_ADDR; + + if (argc == 2) { + load_addr = (void *)simple_strtoul(argv[0], NULL, 16); + initrd_addr = (void *)simple_strtoul(argv[1], NULL, 16); + } else if (argc == 1) { + load_addr = (void *)simple_strtoul(argv[0], NULL, 16); + } + + return qemu_fwcfg_setup_kernel(load_addr, initrd_addr); +} + +static cmd_tbl_t fwcfg_commands[] = { + U_BOOT_CMD_MKENT(list, 0, 1, qemu_fwcfg_do_list, "", ""), + U_BOOT_CMD_MKENT(cpus, 0, 1, qemu_fwcfg_do_cpus, "", ""), + U_BOOT_CMD_MKENT(load, 2, 1, qemu_fwcfg_do_load, "", ""), +}; + +static int do_qemu_fw(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) +{ + int ret; + cmd_tbl_t *fwcfg_cmd; + + if (!fwcfg_present) { + printf("QEMU fw_cfg interface not found\n"); + return CMD_RET_USAGE; + } + + fwcfg_cmd = find_cmd_tbl(argv[1], fwcfg_commands, + ARRAY_SIZE(fwcfg_commands)); + argc -= 2; + argv += 2; + if (!fwcfg_cmd || argc > fwcfg_cmd->maxargs) + return CMD_RET_USAGE; + + ret = fwcfg_cmd->cmd(fwcfg_cmd, flag, argc, argv); + + return cmd_process_error(fwcfg_cmd, ret); +} + +U_BOOT_CMD( + qfw, 4, 1, do_qemu_fw, + "QEMU firmware interface", + "<command>\n" + " - list : print firmware(s) currently loaded\n" + " - cpus : print online cpu number\n" + " - load <kernel addr> <initrd addr> : load kernel and initrd (if any), and setup for zboot\n" +) diff --git a/configs/qemu-x86_defconfig b/configs/qemu-x86_defconfig index 53b1ff6..a813e5b 100644 --- a/configs/qemu-x86_defconfig +++ b/configs/qemu-x86_defconfig @@ -20,6 +20,7 @@ CONFIG_CMD_DHCP=y # CONFIG_CMD_NFS is not set CONFIG_CMD_PING=y CONFIG_CMD_TIME=y +CONFIG_CMD_QEMU_FW_CFG=y CONFIG_CMD_BOOTSTAGE=y CONFIG_CMD_EXT2=y CONFIG_CMD_EXT4=y diff --git a/include/qemu_fw_cfg.h b/include/qemu_fw_cfg.h new file mode 100644 index 0000000..e21f150 --- /dev/null +++ b/include/qemu_fw_cfg.h @@ -0,0 +1,162 @@ +/* + * (C) Copyright 2015 Miao Yan yanmiaobest@gmail.com + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#ifndef __FW_CFG__ +#define __FW_CFG__ + +#define FW_CONTROL_PORT 0x510 +#define FW_DATA_PORT 0x511 +#define FW_DMA_PORT_LOW 0x514 +#define FW_DMA_PORT_HIGH 0x518 + +#include <linux/list.h> + +enum qemu_fwcfg_items { + FW_CFG_SIGNATURE = 0x00, + FW_CFG_ID = 0x01, + FW_CFG_UUID = 0x02, + FW_CFG_RAM_SIZE = 0x03, + FW_CFG_NOGRAPHIC = 0x04, + FW_CFG_NB_CPUS = 0x05, + FW_CFG_MACHINE_ID = 0x06, + FW_CFG_KERNEL_ADDR = 0x07, + FW_CFG_KERNEL_SIZE = 0x08, + FW_CFG_KERNEL_CMDLINE = 0x09, + FW_CFG_INITRD_ADDR = 0x0a, + FW_CFG_INITRD_SIZE = 0x0b, + FW_CFG_BOOT_DEVICE = 0x0c, + FW_CFG_NUMA = 0x0d, + FW_CFG_BOOT_MENU = 0x0e, + FW_CFG_MAX_CPUS = 0x0f, + FW_CFG_KERNEL_ENTRY = 0x10, + FW_CFG_KERNEL_DATA = 0x11, + FW_CFG_INITRD_DATA = 0x12, + FW_CFG_CMDLINE_ADDR = 0x13, + FW_CFG_CMDLINE_SIZE = 0x14, + FW_CFG_CMDLINE_DATA = 0x15, + FW_CFG_SETUP_ADDR = 0x16, + FW_CFG_SETUP_SIZE = 0x17, + FW_CFG_SETUP_DATA = 0x18, + FW_CFG_FILE_DIR = 0x19, + FW_CFG_FILE_FIRST = 0x20, + FW_CFG_WRITE_CHANNEL = 0x4000, + FW_CFG_ARCH_LOCAL = 0x8000, + FW_CFG_INVALID = 0xffff, +}; + +enum { + BIOS_LINKER_LOADER_COMMAND_ALLOCATE = 0x1, + BIOS_LINKER_LOADER_COMMAND_ADD_POINTER = 0x2, + BIOS_LINKER_LOADER_COMMAND_ADD_CHECKSUM = 0x3, +}; + +enum { + BIOS_LINKER_LOADER_ALLOC_ZONE_HIGH = 0x1, + BIOS_LINKER_LOADER_ALLOC_ZONE_FSEG = 0x2, +}; + +#define FW_CFG_FILE_SLOTS 0x10 +#define FW_CFG_MAX_ENTRY (FW_CFG_FILE_FIRST + FW_CFG_FILE_SLOTS) +#define FW_CFG_ENTRY_MASK ~(FW_CFG_WRITE_CHANNEL | FW_CFG_ARCH_LOCAL) + +#define FW_CFG_MAX_FILE_PATH 56 +#define BIOS_LINKER_LOADER_FILESZ FW_CFG_MAX_FILE_PATH + +#define QEMU_FW_CFG_SIGNATURE (('Q' << 24) | ('E' << 16) | ('M' << 8) | 'U') + +#define FW_CFG_DMA_ERROR (1 << 0) +#define FW_CFG_DMA_READ (1 << 1) +#define FW_CFG_DMA_SKIP (1 << 2) +#define FW_CFG_DMA_SELECT (1 << 3) + +#define FW_CFG_DMA_ENABLED (1 << 1) + +struct fw_cfg_file { + __be32 size; + __be16 select; + __be16 reserved; + char name[FW_CFG_MAX_FILE_PATH]; +}; + +struct fw_file { + struct fw_cfg_file cfg; /* firmware file information */ + unsigned long addr; /* firmware file in-memory address */ + struct list_head list; /* list node to link to fw_list */ +}; + +struct fw_cfg_dma_access { + __be32 control; + __be32 length; + __be64 address; +}; + +struct bios_linker_entry { + __le32 command; + union { + /* + * COMMAND_ALLOCATE - allocate a table from @alloc.file + * subject to @alloc.align alignment (must be power of 2) + * and @alloc.zone (can be HIGH or FSEG) requirements. + * + * Must appear exactly once for each file, and before + * this file is referenced by any other command. + */ + struct { + char file[BIOS_LINKER_LOADER_FILESZ]; + __le32 align; + uint8_t zone; + } alloc; + + /* + * COMMAND_ADD_POINTER - patch the table (originating from + * @dest_file) at @pointer.offset, by adding a pointer to the + * table originating from @src_file. 1,2,4 or 8 byte unsigned + * addition is used depending on @pointer.size. + */ + struct { + char dest_file[BIOS_LINKER_LOADER_FILESZ]; + char src_file[BIOS_LINKER_LOADER_FILESZ]; + __le32 offset; + uint8_t size; + } pointer; + + /* + * COMMAND_ADD_CHECKSUM - calculate checksum of the range + * specified by @cksum_start and @cksum_length fields, + * and then add the value at @cksum.offset. + * Checksum simply sums -X for each byte X in the range + * using 8-bit math. + */ + struct { + char file[BIOS_LINKER_LOADER_FILESZ]; + __le32 offset; + __le32 start; + __le32 length; + } cksum; + + /* padding */ + char pad[124]; + }; +} __packed; + +/** + * Initialize QEMU fw_cfg interface + */ +void qemu_fwcfg_init(void); + +void qemu_fwcfg_read_entry(uint16_t entry, uint32_t length, void *address); +int qemu_fwcfg_read_firmware_list(void); +struct fw_file *qemu_fwcfg_find_file(const char *name); +void qemu_fwcfg_free_files(void); + +/** + * Get system cpu number + * + * @return: cpu number in system + */ +int qemu_fwcfg_online_cpus(void); + +#endif