diff options
Diffstat (limited to 'arch/x86/cpu')
| -rw-r--r-- | arch/x86/cpu/baytrail/early_uart.c | 10 | ||||
| -rw-r--r-- | arch/x86/cpu/qemu/Kconfig | 7 | ||||
| -rw-r--r-- | arch/x86/cpu/qemu/Makefile | 2 | ||||
| -rw-r--r-- | arch/x86/cpu/qemu/fw_cfg.c | 316 | ||||
| -rw-r--r-- | arch/x86/cpu/qemu/qemu.c | 29 |
5 files changed, 347 insertions, 17 deletions
diff --git a/arch/x86/cpu/baytrail/early_uart.c b/arch/x86/cpu/baytrail/early_uart.c index b64a3a90db..471d592b49 100644 --- a/arch/x86/cpu/baytrail/early_uart.c +++ b/arch/x86/cpu/baytrail/early_uart.c @@ -59,11 +59,15 @@ static void x86_pci_write_config32(int dev, unsigned int where, u32 value) } /* This can be called after memory-mapped PCI is working */ -int setup_early_uart(void) +int setup_internal_uart(int enable) { - /* Enable the legacy UART hardware. */ + /* Enable or disable the legacy UART hardware */ x86_pci_write_config32(PCI_DEV_CONFIG(0, LPC_DEV, LPC_FUNC), UART_CONT, - 1); + enable); + + /* All done for the disable part, so just return */ + if (!enable) + return 0; /* * Set up the pads to the UART function. This allows the signals to diff --git a/arch/x86/cpu/qemu/Kconfig b/arch/x86/cpu/qemu/Kconfig index 4f9862194a..6808c9a6b9 100644 --- a/arch/x86/cpu/qemu/Kconfig +++ b/arch/x86/cpu/qemu/Kconfig @@ -17,4 +17,11 @@ config SYS_CAR_SIZE hex default 0x10000 +config ACPI_PM1_BASE + hex + default 0xe400 + help + ACPI Power Managment 1 (PM1) i/o-mapped base address. + This device is defined in ACPI specification, with 16 bytes in size. + endif diff --git a/arch/x86/cpu/qemu/Makefile b/arch/x86/cpu/qemu/Makefile index 176ea54ae4..801413a1cb 100644 --- a/arch/x86/cpu/qemu/Makefile +++ b/arch/x86/cpu/qemu/Makefile @@ -8,4 +8,6 @@ ifndef CONFIG_EFI_STUB obj-y += car.o dram.o endif obj-y += cpu.o fw_cfg.o qemu.o +ifndef CONFIG_QEMU_ACPI_TABLE obj-$(CONFIG_GENERATE_ACPI_TABLE) += acpi.o dsdt.o +endif diff --git a/arch/x86/cpu/qemu/fw_cfg.c b/arch/x86/cpu/qemu/fw_cfg.c index 05992145cf..5ea7a6e2e5 100644 --- a/arch/x86/cpu/qemu/fw_cfg.c +++ b/arch/x86/cpu/qemu/fw_cfg.c @@ -10,10 +10,16 @@ #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) @@ -162,29 +168,311 @@ static int qemu_fwcfg_setup_kernel(void *load_addr, void *initrd_addr) return 0; } -static int qemu_fwcfg_list_firmware(void) +static int qemu_fwcfg_read_firmware_list(void) { int i; uint32_t count; - struct fw_cfg_files *files; + 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); - files = malloc(count * sizeof(struct fw_cfg_file)); - if (!files) - return -ENOMEM; - - files->count = count; - qemu_fwcfg_read_entry(FW_CFG_INVALID, - count * sizeof(struct fw_cfg_file), - files->files); - - for (i = 0; i < files->count; i++) - printf("%-56s\n", files->files[i].name); - free(files); + 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, + unsigned long *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 */ +unsigned long write_acpi_tables(unsigned long 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; } diff --git a/arch/x86/cpu/qemu/qemu.c b/arch/x86/cpu/qemu/qemu.c index 5a7b92944a..f8af566dea 100644 --- a/arch/x86/cpu/qemu/qemu.c +++ b/arch/x86/cpu/qemu/qemu.c @@ -15,6 +15,31 @@ static bool i440fx; +static void enable_pm_piix(void) +{ + u8 en; + u16 cmd; + + /* Set the PM I/O base */ + x86_pci_write_config32(PIIX_PM, PMBA, CONFIG_ACPI_PM1_BASE | 1); + + /* Enable access to the PM I/O space */ + cmd = x86_pci_read_config16(PIIX_PM, PCI_COMMAND); + cmd |= PCI_COMMAND_IO; + x86_pci_write_config16(PIIX_PM, PCI_COMMAND, cmd); + + /* PM I/O Space Enable (PMIOSE) */ + en = x86_pci_read_config8(PIIX_PM, PMREGMISC); + en |= PMIOSE; + x86_pci_write_config8(PIIX_PM, PMREGMISC, en); +} + +static void enable_pm_ich9(void) +{ + /* Set the PM I/O base */ + x86_pci_write_config32(ICH9_PM, PMBA, CONFIG_ACPI_PM1_BASE | 1); +} + static void qemu_chipset_init(void) { u16 device, xbcs; @@ -53,10 +78,14 @@ static void qemu_chipset_init(void) xbcs = x86_pci_read_config16(PIIX_ISA, XBCS); xbcs |= APIC_EN; x86_pci_write_config16(PIIX_ISA, XBCS, xbcs); + + enable_pm_piix(); } else { /* Configure PCIe ECAM base address */ x86_pci_write_config32(PCI_BDF(0, 0, 0), PCIEX_BAR, CONFIG_PCIE_ECAM_BASE | BAR_EN); + + enable_pm_ich9(); } qemu_fwcfg_init(); |