diff options
| -rw-r--r-- | arch/x86/Kconfig | 2 | ||||
| -rw-r--r-- | arch/x86/kernel/Makefile_64 | 1 | ||||
| -rw-r--r-- | arch/x86/kernel/efi.c | 480 | ||||
| -rw-r--r-- | arch/x86/kernel/efi_64.c | 164 | ||||
| -rw-r--r-- | arch/x86/kernel/efi_stub_64.S | 109 | ||||
| -rw-r--r-- | arch/x86/kernel/setup_64.c | 17 | ||||
| -rw-r--r-- | include/asm-x86/bootparam.h | 5 | ||||
| -rw-r--r-- | include/asm-x86/efi.h | 70 | ||||
| -rw-r--r-- | include/asm-x86/fixmap_64.h | 3 |
9 files changed, 847 insertions, 4 deletions
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index fef944bb920e..23936301db56 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -959,7 +959,7 @@ config MTRR config EFI def_bool n prompt "Boot from EFI support" - depends on X86_32 && ACPI + depends on ACPI ---help--- This enables the kernel to boot on EFI platforms using system configuration information passed to it from the firmware. diff --git a/arch/x86/kernel/Makefile_64 b/arch/x86/kernel/Makefile_64 index 2ec96acf6486..e5093dd8cf01 100644 --- a/arch/x86/kernel/Makefile_64 +++ b/arch/x86/kernel/Makefile_64 @@ -39,6 +39,7 @@ obj-$(CONFIG_X86_PM_TIMER) += pmtimer_64.o obj-$(CONFIG_X86_VSMP) += vsmp_64.o obj-$(CONFIG_K8_NB) += k8.o obj-$(CONFIG_AUDIT) += audit_64.o +obj-$(CONFIG_EFI) += efi.o efi_64.o efi_stub_64.o obj-$(CONFIG_MODULES) += module_64.o obj-$(CONFIG_PCI) += early-quirks.o diff --git a/arch/x86/kernel/efi.c b/arch/x86/kernel/efi.c new file mode 100644 index 000000000000..0a61522e85c7 --- /dev/null +++ b/arch/x86/kernel/efi.c @@ -0,0 +1,480 @@ +/* + * Common EFI (Extensible Firmware Interface) support functions + * Based on Extensible Firmware Interface Specification version 1.0 + * + * Copyright (C) 1999 VA Linux Systems + * Copyright (C) 1999 Walt Drummond <drummond@valinux.com> + * Copyright (C) 1999-2002 Hewlett-Packard Co. + * David Mosberger-Tang <davidm@hpl.hp.com> + * Stephane Eranian <eranian@hpl.hp.com> + * Copyright (C) 2005-2008 Intel Co. + * Fenghua Yu <fenghua.yu@intel.com> + * Bibo Mao <bibo.mao@intel.com> + * Chandramouli Narayanan <mouli@linux.intel.com> + * Huang Ying <ying.huang@intel.com> + * + * Copied from efi_32.c to eliminate the duplicated code between EFI + * 32/64 support code. --ying 2007-10-26 + * + * All EFI Runtime Services are not implemented yet as EFI only + * supports physical mode addressing on SoftSDV. This is to be fixed + * in a future version. --drummond 1999-07-20 + * + * Implemented EFI runtime services and virtual mode calls. --davidm + * + * Goutham Rao: <goutham.rao@intel.com> + * Skip non-WB memory and ignore empty memory ranges. + */ + +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/efi.h> +#include <linux/bootmem.h> +#include <linux/spinlock.h> +#include <linux/uaccess.h> +#include <linux/time.h> +#include <linux/io.h> +#include <linux/reboot.h> +#include <linux/bcd.h> + +#include <asm/setup.h> +#include <asm/efi.h> +#include <asm/time.h> + +#define EFI_DEBUG 1 +#define PFX "EFI: " + +int efi_enabled; +EXPORT_SYMBOL(efi_enabled); + +struct efi efi; +EXPORT_SYMBOL(efi); + +struct efi_memory_map memmap; + +struct efi efi_phys __initdata; +static efi_system_table_t efi_systab __initdata; + +static efi_status_t virt_efi_get_time(efi_time_t *tm, efi_time_cap_t *tc) +{ + return efi_call_virt2(get_time, tm, tc); +} + +static efi_status_t virt_efi_set_time(efi_time_t *tm) +{ + return efi_call_virt1(set_time, tm); +} + +static efi_status_t virt_efi_get_wakeup_time(efi_bool_t *enabled, + efi_bool_t *pending, + efi_time_t *tm) +{ + return efi_call_virt3(get_wakeup_time, + enabled, pending, tm); +} + +static efi_status_t virt_efi_set_wakeup_time(efi_bool_t enabled, efi_time_t *tm) +{ + return efi_call_virt2(set_wakeup_time, + enabled, tm); +} + +static efi_status_t virt_efi_get_variable(efi_char16_t *name, + efi_guid_t *vendor, + u32 *attr, + unsigned long *data_size, + void *data) +{ + return efi_call_virt5(get_variable, + name, vendor, attr, + data_size, data); +} + +static efi_status_t virt_efi_get_next_variable(unsigned long *name_size, + efi_char16_t *name, + efi_guid_t *vendor) +{ + return efi_call_virt3(get_next_variable, + name_size, name, vendor); +} + +static efi_status_t virt_efi_set_variable(efi_char16_t *name, + efi_guid_t *vendor, + unsigned long attr, + unsigned long data_size, + void *data) +{ + return efi_call_virt5(set_variable, + name, vendor, attr, + data_size, data); +} + +static efi_status_t virt_efi_get_next_high_mono_count(u32 *count) +{ + return efi_call_virt1(get_next_high_mono_count, count); +} + +static void virt_efi_reset_system(int reset_type, + efi_status_t status, + unsigned long data_size, + efi_char16_t *data) +{ + efi_call_virt4(reset_system, reset_type, status, + data_size, data); +} + +static efi_status_t virt_efi_set_virtual_address_map( + unsigned long memory_map_size, + unsigned long descriptor_size, + u32 descriptor_version, + efi_memory_desc_t *virtual_map) +{ + return efi_call_virt4(set_virtual_address_map, + memory_map_size, descriptor_size, + descriptor_version, virtual_map); +} + +static efi_status_t __init phys_efi_set_virtual_address_map( + unsigned long memory_map_size, + unsigned long descriptor_size, + u32 descriptor_version, + efi_memory_desc_t *virtual_map) +{ + efi_status_t status; + + efi_call_phys_prelog(); + status = efi_call_phys4(efi_phys.set_virtual_address_map, + memory_map_size, descriptor_size, + descriptor_version, virtual_map); + efi_call_phys_epilog(); + return status; +} + +static efi_status_t __init phys_efi_get_time(efi_time_t *tm, + efi_time_cap_t *tc) +{ + efi_status_t status; + + efi_call_phys_prelog(); + status = efi_call_phys2(efi_phys.get_time, tm, tc); + efi_call_phys_epilog(); + return status; +} + +int efi_set_rtc_mmss(unsigned long nowtime) +{ + int real_seconds, real_minutes; + efi_status_t status; + efi_time_t eft; + efi_time_cap_t cap; + + status = efi.get_time(&eft, &cap); + if (status != EFI_SUCCESS) { + printk(KERN_ERR "Oops: efitime: can't read time!\n"); + return -1; + } + + real_seconds = nowtime % 60; + real_minutes = nowtime / 60; + if (((abs(real_minutes - eft.minute) + 15)/30) & 1) + real_minutes += 30; + real_minutes %= 60; + eft.minute = real_minutes; + eft.second = real_seconds; + + status = efi.set_time(&eft); + if (status != EFI_SUCCESS) { + printk(KERN_ERR "Oops: efitime: can't write time!\n"); + return -1; + } + return 0; +} + +unsigned long efi_get_time(void) +{ + efi_status_t status; + efi_time_t eft; + efi_time_cap_t cap; + + status = efi.get_time(&eft, &cap); + if (status != EFI_SUCCESS) + printk(KERN_ERR "Oops: efitime: can't read time!\n"); + + return mktime(eft.year, eft.month, eft.day, eft.hour, + eft.minute, eft.second); +} + +#if EFI_DEBUG +static void __init print_efi_memmap(void) +{ + efi_memory_desc_t *md; + void *p; + int i; + + for (p = memmap.map, i = 0; + p < memmap.map_end; + p += memmap.desc_size, i++) { + md = p; + printk(KERN_INFO PFX "mem%02u: type=%u, attr=0x%llx, " + "range=[0x%016llx-0x%016llx) (%lluMB)\n", + i, md->type, md->attribute, md->phys_addr, + md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT), + (md->num_pages >> (20 - EFI_PAGE_SHIFT))); + } +} +#endif /* EFI_DEBUG */ + +void __init efi_init(void) +{ + efi_config_table_t *config_tables; + efi_runtime_services_t *runtime; + efi_char16_t *c16; + char vendor[100] = "unknown"; + int i = 0; + void *tmp; + +#ifdef CONFIG_X86_32 + efi_phys.systab = (efi_system_table_t *)boot_params.efi_info.efi_systab; + memmap.phys_map = (void *)boot_params.efi_info.efi_memmap; +#else + efi_phys.systab = (efi_system_table_t *) + (boot_params.efi_info.efi_systab | + ((__u64)boot_params.efi_info.efi_systab_hi<<32)); + memmap.phys_map = (void *) + (boot_params.efi_info.efi_memmap | + ((__u64)boot_params.efi_info.efi_memmap_hi<<32)); +#endif + memmap.nr_map = boot_params.efi_info.efi_memmap_size / + boot_params.efi_info.efi_memdesc_size; + memmap.desc_version = boot_params.efi_info.efi_memdesc_version; + memmap.desc_size = boot_params.efi_info.efi_memdesc_size; + + efi.systab = efi_early_ioremap((unsigned long)efi_phys.systab, + sizeof(efi_system_table_t)); + if (efi.systab == NULL) + printk(KERN_ERR "Couldn't map the EFI system table!\n"); + memcpy(&efi_systab, efi.systab, sizeof(efi_system_table_t)); + efi_early_iounmap(efi.systab, sizeof(efi_system_table_t)); + efi.systab = &efi_systab; + + /* + * Verify the EFI Table + */ + if (efi.systab->hdr.signature != EFI_SYSTEM_TABLE_SIGNATURE) + printk(KERN_ERR "EFI system table signature incorrect!\n"); + if ((efi.systab->hdr.revision >> 16) == 0) + printk(KERN_ERR "Warning: EFI system table version " + "%d.%02d, expected 1.00 or greater!\n", + efi.systab->hdr.revision >> 16, + efi.systab->hdr.revision & 0xffff); + + /* + * Show what we know for posterity + */ + c16 = tmp = efi_early_ioremap(efi.systab->fw_vendor, 2); + if (c16) { + for (i = 0; i < sizeof(vendor) && *c16; ++i) + vendor[i] = *c16++; + vendor[i] = '\0'; + } else + printk(KERN_ERR PFX "Could not map the firmware vendor!\n"); + efi_early_iounmap(tmp, 2); + + printk(KERN_INFO "EFI v%u.%.02u by %s \n", + efi.systab->hdr.revision >> 16, + efi.systab->hdr.revision & 0xffff, vendor); + + /* + * Let's see what config tables the firmware passed to us. + */ + config_tables = efi_early_ioremap( + efi.systab->tables, + efi.systab->nr_tables * sizeof(efi_config_table_t)); + if (config_tables == NULL) + printk(KERN_ERR "Could not map EFI Configuration Table!\n"); + + printk(KERN_INFO); + for (i = 0; i < efi.systab->nr_tables; i++) { + if (!efi_guidcmp(config_tables[i].guid, MPS_TABLE_GUID)) { + efi.mps = config_tables[i].table; + printk(" MPS=0x%lx ", config_tables[i].table); + } else if (!efi_guidcmp(config_tables[i].guid, + ACPI_20_TABLE_GUID)) { + efi.acpi20 = config_tables[i].table; + printk(" ACPI 2.0=0x%lx ", config_tables[i].table); + } else if (!efi_guidcmp(config_tables[i].guid, + ACPI_TABLE_GUID)) { + efi.acpi = config_tables[i].table; + printk(" ACPI=0x%lx ", config_tables[i].table); + } else if (!efi_guidcmp(config_tables[i].guid, + SMBIOS_TABLE_GUID)) { + efi.smbios = config_tables[i].table; + printk(" SMBIOS=0x%lx ", config_tables[i].table); + } else if (!efi_guidcmp(config_tables[i].guid, + HCDP_TABLE_GUID)) { + efi.hcdp = config_tables[i].table; + printk(" HCDP=0x%lx ", config_tables[i].table); + } else if (!efi_guidcmp(config_tables[i].guid, + UGA_IO_PROTOCOL_GUID)) { + efi.uga = config_tables[i].table; + printk(" UGA=0x%lx ", config_tables[i].table); + } + } + printk("\n"); + efi_early_iounmap(config_tables, + efi.systab->nr_tables * sizeof(efi_config_table_t)); + + /* + * Check out the runtime services table. We need to map + * the runtime services table so that we can grab the physical + * address of several of the EFI runtime functions, needed to + * set the firmware into virtual mode. + */ + runtime = efi_early_ioremap((unsigned long)efi.systab->runtime, + sizeof(efi_runtime_services_t)); + if (runtime != NULL) { + /* + * We will only need *early* access to the following + * two EFI runtime services before set_virtual_address_map + * is invoked. + */ + efi_phys.get_time = (efi_get_time_t *)runtime->get_time; + efi_phys.set_virtual_address_map = + (efi_set_virtual_address_map_t *) + runtime->set_virtual_address_map; + /* + * Make efi_get_time can be called before entering + * virtual mode. + */ + efi.get_time = phys_efi_get_time; + } else + printk(KERN_ERR "Could not map the EFI runtime service " + "table!\n"); + efi_early_iounmap(runtime, sizeof(efi_runtime_services_t)); + + /* Map the EFI memory map */ + memmap.map = efi_early_ioremap((unsigned long)memmap.phys_map, + memmap.nr_map * memmap.desc_size); + if (memmap.map == NULL) + printk(KERN_ERR "Could not map the EFI memory map!\n"); + memmap.map_end = memmap.map + (memmap.nr_map * memmap.desc_size); + if (memmap.desc_size != sizeof(efi_memory_desc_t)) + printk(KERN_WARNING "Kernel-defined memdesc" + "doesn't match the one from EFI!\n"); + +#ifdef CONFIG_X86_64 + /* Setup for EFI runtime service */ + reboot_type = BOOT_EFI; + +#endif +#if EFI_DEBUG + print_efi_memmap(); +#endif +} + +/* + * This function will switch the EFI runtime services to virtual mode. + * Essentially, look through the EFI memmap and map every region that + * has the runtime attribute bit set in its memory descriptor and update + * that memory descriptor with the virtual address obtained from ioremap(). + * This enables the runtime services to be called without having to + * thunk back into physical mode for every invocation. + */ +void __init efi_enter_virtual_mode(void) +{ + efi_memory_desc_t *md; + efi_status_t status; + unsigned long end; + void *p; + + efi.systab = NULL; + for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) { + md = p; + if (!(md->attribute & EFI_MEMORY_RUNTIME)) + continue; + if ((md->attribute & EFI_MEMORY_WB) && + (((md->phys_addr + (md->num_pages<<EFI_PAGE_SHIFT)) >> + PAGE_SHIFT) < end_pfn_map)) + md->virt_addr = (unsigned long)__va(md->phys_addr); + else + md->virt_addr = (unsigned long) + efi_ioremap(md->phys_addr, + md->num_pages << EFI_PAGE_SHIFT); + if (!md->virt_addr) + printk(KERN_ERR PFX "ioremap of 0x%llX failed!\n", + (unsigned long long)md->phys_addr); + end = md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT); + if ((md->phys_addr <= (unsigned long)efi_phys.systab) && + ((unsigned long)efi_phys.systab < end)) + efi.systab = (efi_system_table_t *)(unsigned long) + (md->virt_addr - md->phys_addr + + (unsigned long)efi_phys.systab); + } + + BUG_ON(!efi.systab); + + status = phys_efi_set_virtual_address_map( + memmap.desc_size * memmap.nr_map, + memmap.desc_size, + memmap.desc_version, + memmap.phys_map); + + if (status != EFI_SUCCESS) { + printk(KERN_ALERT "Unable to switch EFI into virtual mode " + "(status=%lx)!\n", status); + panic("EFI call to SetVirtualAddressMap() failed!"); + } + + /* + * Now that EFI is in virtual mode, update the function + * pointers in the runtime service table to the new virtual addresses. + * + * Call EFI services through wrapper functions. + */ + efi.get_time = virt_efi_get_time; + efi.set_time = virt_efi_set_time; + efi.get_wakeup_time = virt_efi_get_wakeup_time; + efi.set_wakeup_time = virt_efi_set_wakeup_time; + efi.get_variable = virt_efi_get_variable; + efi.get_next_variable = virt_efi_get_next_variable; + efi.set_variable = virt_efi_set_variable; + efi.get_next_high_mono_count = virt_efi_get_next_high_mono_count; + efi.reset_system = virt_efi_reset_system; + efi.set_virtual_address_map = virt_efi_set_virtual_address_map; +#ifdef CONFIG_X86_64 + runtime_code_page_mkexec(); +#endif +} + +/* + * Convenience functions to obtain memory types and attributes + */ +u32 efi_mem_type(unsigned long phys_addr) +{ + efi_memory_desc_t *md; + void *p; + + for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) { + md = p; + if ((md->phys_addr <= phys_addr) && + (phys_addr < (md->phys_addr + + (md->num_pages << EFI_PAGE_SHIFT)))) + return md->type; + } + return 0; +} + +u64 efi_mem_attributes(unsigned long phys_addr) +{ + efi_memory_desc_t *md; + void *p; + + for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) { + md = p; + if ((md->phys_addr <= phys_addr) && + (phys_addr < (md->phys_addr + + (md->num_pages << EFI_PAGE_SHIFT)))) + return md->attribute; + } + return 0; +} diff --git a/arch/x86/kernel/efi_64.c b/arch/x86/kernel/efi_64.c new file mode 100644 index 000000000000..f2000dbc7195 --- /dev/null +++ b/arch/x86/kernel/efi_64.c @@ -0,0 +1,164 @@ +/* + * x86_64 specific EFI support functions + * Based on Extensible Firmware Interface Specification version 1.0 + * + * Copyright (C) 2005-2008 Intel Co. + * Fenghua Yu <fenghua.yu@intel.com> + * Bibo Mao <bibo.mao@intel.com> + * Chandramouli Narayanan <mouli@linux.intel.com> + * Huang Ying <ying.huang@intel.com> + * + * Code to convert EFI to E820 map has been implemented in elilo bootloader + * based on a EFI patch by Edgar Hucek. Based on the E820 map, the page table + * is setup appropriately for EFI runtime code. + * - mouli 06/14/2007. + * + */ + +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/mm.h> +#include <linux/types.h> +#include <linux/spinlock.h> +#include <linux/bootmem.h> +#include <linux/ioport.h> +#include <linux/module.h> +#include <linux/efi.h> +#include <linux/uaccess.h> +#include <linux/io.h> +#include <linux/reboot.h> + +#include <asm/setup.h> +#include <asm/page.h> +#include <asm/e820.h> +#include <asm/pgtable.h> +#include <asm/tlbflush.h> +#include <asm/cacheflush.h> +#include <asm/proto.h> +#include <asm/efi.h> + +static pgd_t save_pgd __initdata; +static unsigned long efi_flags __initdata; + +static int __init setup_noefi(char *arg) +{ + efi_enabled = 0; + return 0; +} +early_param("noefi", setup_noefi); + +static void __init early_mapping_set_exec(unsigned long start, + unsigned long end, + int executable) +{ + pte_t *kpte; + int level; + + while (start < end) { + kpte = lookup_address((unsigned long)__va(start), &level); + BUG_ON(!kpte); + if (executable) + set_pte(kpte, pte_mkexec(*kpte)); + else + set_pte(kpte, __pte((pte_val(*kpte) | _PAGE_NX) & \ + __supported_pte_mask)); + if (pte_huge(*kpte)) + start = (start + PMD_SIZE) & PMD_MASK; + else + start = (start + PAGE_SIZE) & PAGE_MASK; + } +} + +static void __init early_runtime_code_mapping_set_exec(int executable) +{ + efi_memory_desc_t *md; + void *p; + + /* Make EFI runtime service code area executable */ + for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) { + md = p; + if (md->type == EFI_RUNTIME_SERVICES_CODE) { + unsigned long end; + end = md->phys_addr + (md->num_pages << PAGE_SHIFT); + early_mapping_set_exec(md->phys_addr, end, executable); + } + } +} + +void __init efi_call_phys_prelog(void) +{ + unsigned long vaddress; + + local_irq_save(efi_flags); + early_runtime_code_mapping_set_exec(1); + vaddress = (unsigned long)__va(0x0UL); + pgd_val(save_pgd) = pgd_val(*pgd_offset_k(0x0UL)); + set_pgd(pgd_offset_k(0x0UL), *pgd_offset_k(vaddress)); + __flush_tlb_all(); +} + +void __init efi_call_phys_epilog(void) +{ + /* + * After the lock is released, the original page table is restored. + */ + set_pgd(pgd_offset_k(0x0UL), save_pgd); + early_runtime_code_mapping_set_exec(0); + __flush_tlb_all(); + local_irq_restore(efi_flags); +} + +/* + * We need to map the EFI memory map again after init_memory_mapping(). + */ +void __init efi_map_memmap(void) +{ + memmap.map = __va(memmap.phys_map); + memmap.map_end = memmap.map + (memmap.nr_map * memmap.desc_size); +} + +void __init efi_reserve_bootmem(void) +{ + reserve_bootmem_generic((unsigned long)memmap.phys_map, + memmap.nr_map * memmap.desc_size); +} + +void __init runtime_code_page_mkexec(void) +{ + efi_memory_desc_t *md; + void *p; + + /* Make EFI runtime service code area executable */ + for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) { + md = p; + if (md->type == EFI_RUNTIME_SERVICES_CODE) + change_page_attr_addr(md->virt_addr, + md->num_pages, + PAGE_KERNEL_EXEC); + } + __flush_tlb_all(); +} + +void __iomem * __init efi_ioremap(unsigned long offset, + unsigned long size) +{ + static unsigned pages_mapped; + unsigned long last_addr; + unsigned i, pages; + + last_addr = offset + size - 1; + offset &= PAGE_MASK; + pages = (PAGE_ALIGN(last_addr) - offset) >> PAGE_SHIFT; + if (pages_mapped + pages > MAX_EFI_IO_PAGES) + return NULL; + + for (i = 0; i < pages; i++) { + set_fixmap_nocache(FIX_EFI_IO_MAP_FIRST_PAGE - pages_mapped, + offset); + offset += PAGE_SIZE; + pages_mapped++; + } + + return (void __iomem *)__fix_to_virt(FIX_EFI_IO_MAP_FIRST_PAGE - \ + (pages_mapped - pages)); +} diff --git a/arch/x86/kernel/efi_stub_64.S b/arch/x86/kernel/efi_stub_64.S new file mode 100644 index 000000000000..99b47d48c9f4 --- /dev/null +++ b/arch/x86/kernel/efi_stub_64.S @@ -0,0 +1,109 @@ +/* + * Function calling ABI conversion from Linux to EFI for x86_64 + * + * Copyright (C) 2007 Intel Corp + * Bibo Mao <bibo.mao@intel.com> + * Huang Ying <ying.huang@intel.com> + */ + +#include <linux/linkage.h> + +#define SAVE_XMM \ + mov %rsp, %rax; \ + subq $0x70, %rsp; \ + and $~0xf, %rsp; \ + mov %rax, (%rsp); \ + mov %cr0, %rax; \ + clts; \ + mov %rax, 0x8(%rsp); \ + movaps %xmm0, 0x60(%rsp); \ + movaps %xmm1, 0x50(%rsp); \ + movaps %xmm2, 0x40(%rsp); \ + movaps %xmm3, 0x30(%rsp); \ + movaps %xmm4, 0x20(%rsp); \ + movaps %xmm5, 0x10(%rsp) + +#define RESTORE_XMM \ + movaps 0x60(%rsp), %xmm0; \ + movaps 0x50(%rsp), %xmm1; \ + movaps 0x40(%rsp), %xmm2; \ + movaps 0x30(%rsp), %xmm3; \ + movaps 0x20(%rsp), %xmm4; \ + movaps 0x10(%rsp), %xmm5; \ + mov 0x8(%rsp), %rsi; \ + mov %rsi, %cr0; \ + mov (%rsp), %rsp + +ENTRY(efi_call0) + SAVE_XMM + subq $32, %rsp + call *%rdi + addq $32, %rsp + RESTORE_XMM + ret + +ENTRY(efi_call1) + SAVE_XMM + subq $32, %rsp + mov %rsi, %rcx + call *%rdi + addq $32, %rsp + RESTORE_XMM + ret + +ENTRY(efi_call2) + SAVE_XMM + subq $32, %rsp + mov %rsi, %rcx + call *%rdi + addq $32, %rsp + RESTORE_XMM + ret + +ENTRY(efi_call3) + SAVE_XMM + subq $32, %rsp + mov %rcx, %r8 + mov %rsi, %rcx + call *%rdi + addq $32, %rsp + RESTORE_XMM + ret + +ENTRY(efi_call4) + SAVE_XMM + subq $32, %rsp + mov %r8, %r9 + mov %rcx, %r8 + mov %rsi, %rcx + call *%rdi + addq $32, %rsp + RESTORE_XMM + ret + +ENTRY(efi_call5) + SAVE_XMM + subq $48, %rsp + mov %r9, 32(%rsp) + mov %r8, %r9 + mov %rcx, %r8 + mov %rsi, %rcx + call *%rdi + addq $48, %rsp + RESTORE_XMM + ret + +ENTRY(efi_call6) + SAVE_XMM + mov (%rsp), %rax + mov 8(%rax), %rax + subq $48, %rsp + mov %r9, 32(%rsp) + mov %rax, 40(%rsp) + mov %r8, %r9 + mov %rcx, %r8 + mov %rsi, %rcx + call *%rdi + addq $48, %rsp + RESTORE_XMM + ret diff --git a/arch/x86/kernel/setup_64.c b/arch/x86/kernel/setup_64.c index 8dd110d93e73..90b8bb4748b9 100644 --- a/arch/x86/kernel/setup_64.c +++ b/arch/x86/kernel/setup_64.c @@ -30,6 +30,7 @@ #include <linux/crash_dump.h> #include <linux/root_dev.h> #include <linux/pci.h> +#include <linux/efi.h> #include <linux/acpi.h> #include <linux/kallsyms.h> #include <linux/edd.h> @@ -299,6 +300,11 @@ void __init setup_arch(char **cmdline_p) rd_prompt = ((boot_params.hdr.ram_size & RAMDISK_PROMPT_FLAG) != 0); rd_doload = ((boot_params.hdr.ram_size & RAMDISK_LOAD_FLAG) != 0); #endif +#ifdef CONFIG_EFI + if (!strncmp((char *)&boot_params.efi_info.efi_loader_signature, + "EL64", 4)) + efi_enabled = 1; +#endif ARCH_SETUP @@ -341,6 +347,8 @@ void __init setup_arch(char **cmdline_p) discover_ebda(); init_memory_mapping(0, (end_pfn_map << PAGE_SHIFT)); + if (efi_enabled) + efi_init(); dmi_scan_machine(); @@ -414,6 +422,12 @@ void __init setup_arch(char **cmdline_p) */ acpi_reserve_bootmem(); #endif + + if (efi_enabled) { + efi_map_memmap(); + efi_reserve_bootmem(); + } + /* * Find and reserve possible boot-time SMP configuration: */ @@ -479,7 +493,8 @@ void __init setup_arch(char **cmdline_p) #ifdef CONFIG_VT #if defined(CONFIG_VGA_CONSOLE) - conswitchp = &vga_con; + if (!efi_enabled || (efi_mem_type(0xa0000) != EFI_CONVENTIONAL_MEMORY)) + conswitchp = &vga_con; #elif defined(CONFIG_DUMMY_CONSOLE) conswitchp = &dummy_con; #endif diff --git a/include/asm-x86/bootparam.h b/include/asm-x86/bootparam.h index 19f3ddf2df4b..51151356840f 100644 --- a/include/asm-x86/bootparam.h +++ b/include/asm-x86/bootparam.h @@ -54,13 +54,14 @@ struct sys_desc_table { }; struct efi_info { - __u32 _pad1; + __u32 efi_loader_signature; __u32 efi_systab; __u32 efi_memdesc_size; __u32 efi_memdesc_version; __u32 efi_memmap; __u32 efi_memmap_size; - __u32 _pad2[2]; + __u32 efi_systab_hi; + __u32 efi_memmap_hi; }; /* The so-called "zeropage" */ diff --git a/include/asm-x86/efi.h b/include/asm-x86/efi.h new file mode 100644 index 000000000000..1459d3d58653 --- /dev/null +++ b/include/asm-x86/efi.h @@ -0,0 +1,70 @@ +#ifndef _ASM_X86_EFI_H +#define _ASM_X86_EFI_H + +#ifdef CONFIG_X86_32 +#else /* !CONFIG_X86_32 */ + +#define MAX_EFI_IO_PAGES 100 + +extern u64 efi_call0(void *fp); +extern u64 efi_call1(void *fp, u64 arg1); +extern u64 efi_call2(void *fp, u64 arg1, u64 arg2); +extern u64 efi_call3(void *fp, u64 arg1, u64 arg2, u64 arg3); +extern u64 efi_call4(void *fp, u64 arg1, u64 arg2, u64 arg3, u64 arg4); +extern u64 efi_call5(void *fp, u64 arg1, u64 arg2, u64 arg3, + u64 arg4, u64 arg5); +extern u64 efi_call6(void *fp, u64 arg1, u64 arg2, u64 arg3, + u64 arg4, u64 arg5, u64 arg6); + +#define efi_call_phys0(f) \ + efi_call0((void *)(f)) +#define efi_call_phys1(f, a1) \ + efi_call1((void *)(f), (u64)(a1)) +#define efi_call_phys2(f, a1, a2) \ + efi_call2((void *)(f), (u64)(a1), (u64)(a2)) +#define efi_call_phys3(f, a1, a2, a3) \ + efi_call3((void *)(f), (u64)(a1), (u64)(a2), (u64)(a3)) +#define efi_call_phys4(f, a1, a2, a3, a4) \ + efi_call4((void *)(f), (u64)(a1), (u64)(a2), (u64)(a3), \ + (u64)(a4)) +#define efi_call_phys5(f, a1, a2, a3, a4, a5) \ + efi_call5((void *)(f), (u64)(a1), (u64)(a2), (u64)(a3), \ + (u64)(a4), (u64)(a5)) +#define efi_call_phys6(f, a1, a2, a3, a4, a5, a6) \ + efi_call6((void *)(f), (u64)(a1), (u64)(a2), (u64)(a3), \ + (u64)(a4), (u64)(a5), (u64)(a6)) + +#define efi_call_virt0(f) \ + efi_call0((void *)(efi.systab->runtime->f)) +#define efi_call_virt1(f, a1) \ + efi_call1((void *)(efi.systab->runtime->f), (u64)(a1)) +#define efi_call_virt2(f, a1, a2) \ + efi_call2((void *)(efi.systab->runtime->f), (u64)(a1), (u64)(a2)) +#define efi_call_virt3(f, a1, a2, a3) \ + efi_call3((void *)(efi.systab->runtime->f), (u64)(a1), (u64)(a2), \ + (u64)(a3)) +#define efi_call_virt4(f, a1, a2, a3, a4) \ + efi_call4((void *)(efi.systab->runtime->f), (u64)(a1), (u64)(a2), \ + (u64)(a3), (u64)(a4)) +#define efi_call_virt5(f, a1, a2, a3, a4, a5) \ + efi_call5((void *)(efi.systab->runtime->f), (u64)(a1), (u64)(a2), \ + (u64)(a3), (u64)(a4), (u64)(a5)) +#define efi_call_virt6(f, a1, a2, a3, a4, a5, a6) \ + efi_call6((void *)(efi.systab->runtime->f), (u64)(a1), (u64)(a2), \ + (u64)(a3), (u64)(a4), (u64)(a5), (u64)(a6)) + +#define efi_early_ioremap(addr, size) early_ioremap(addr, size) +#define efi_early_iounmap(vaddr, size) early_iounmap(vaddr, size) + +extern void *efi_ioremap(unsigned long offset, unsigned long size); + +extern int efi_time; + +#endif /* CONFIG_X86_32 */ + +extern void efi_reserve_bootmem(void); +extern void efi_call_phys_prelog(void); +extern void efi_call_phys_epilog(void); +extern void runtime_code_page_mkexec(void); + +#endif diff --git a/include/asm-x86/fixmap_64.h b/include/asm-x86/fixmap_64.h index cdfbe4a6ae6f..8f44782e5fe5 100644 --- a/include/asm-x86/fixmap_64.h +++ b/include/asm-x86/fixmap_64.h @@ -15,6 +15,7 @@ #include <asm/apicdef.h> #include <asm/page.h> #include <asm/vsyscall.h> +#include <asm/efi.h> /* * Here we define all the compile-time 'special' virtual @@ -41,6 +42,8 @@ enum fixed_addresses { FIX_APIC_BASE, /* local (CPU) APIC) -- required for SMP or not */ FIX_IO_APIC_BASE_0, FIX_IO_APIC_BASE_END = FIX_IO_APIC_BASE_0 + MAX_IO_APICS-1, + FIX_EFI_IO_MAP_LAST_PAGE, + FIX_EFI_IO_MAP_FIRST_PAGE = FIX_EFI_IO_MAP_LAST_PAGE+MAX_EFI_IO_PAGES-1, __end_of_fixed_addresses }; |