158 lines
4.7 KiB
C
158 lines
4.7 KiB
C
#ifndef _ASM_X86_EFI_H
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#define _ASM_X86_EFI_H
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/*
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* We map the EFI regions needed for runtime services non-contiguously,
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* with preserved alignment on virtual addresses starting from -4G down
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* for a total max space of 64G. This way, we provide for stable runtime
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* services addresses across kernels so that a kexec'd kernel can still
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* use them.
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*
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* This is the main reason why we're doing stable VA mappings for RT
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* services.
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*
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* This flag is used in conjuction with a chicken bit called
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* "efi=old_map" which can be used as a fallback to the old runtime
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* services mapping method in case there's some b0rkage with a
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* particular EFI implementation (haha, it is hard to hold up the
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* sarcasm here...).
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*/
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#define EFI_OLD_MEMMAP EFI_ARCH_1
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#define EFI32_LOADER_SIGNATURE "EL32"
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#define EFI64_LOADER_SIGNATURE "EL64"
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#ifdef CONFIG_X86_32
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extern unsigned long asmlinkage efi_call_phys(void *, ...);
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/*
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* Wrap all the virtual calls in a way that forces the parameters on the stack.
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*/
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/* Use this macro if your virtual returns a non-void value */
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#define efi_call_virt(f, args...) \
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((efi_##f##_t __attribute__((regparm(0)))*)efi.systab->runtime->f)(args)
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/* Use this macro if your virtual call does not return any value */
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#define __efi_call_virt(f, args...) efi_call_virt(f, args)
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#define efi_ioremap(addr, size, type, attr) ioremap_cache(addr, size)
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#else /* !CONFIG_X86_32 */
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#define EFI_LOADER_SIGNATURE "EL64"
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extern u64 asmlinkage efi_call(void *fp, ...);
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#define efi_call_phys(f, args...) efi_call((f), args)
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#define efi_call_virt(f, ...) \
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({ \
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efi_status_t __s; \
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\
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efi_sync_low_kernel_mappings(); \
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preempt_disable(); \
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__s = efi_call((void *)efi.systab->runtime->f, __VA_ARGS__); \
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preempt_enable(); \
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__s; \
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})
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/*
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* All X86_64 virt calls return non-void values. Thus, use non-void call for
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* virt calls that would be void on X86_32.
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*/
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#define __efi_call_virt(f, args...) efi_call_virt(f, args)
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extern void __iomem *efi_ioremap(unsigned long addr, unsigned long size,
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u32 type, u64 attribute);
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#endif /* CONFIG_X86_32 */
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extern int add_efi_memmap;
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extern struct efi_scratch efi_scratch;
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extern void efi_set_executable(efi_memory_desc_t *md, bool executable);
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extern int efi_memblock_x86_reserve_range(void);
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extern void efi_call_phys_prelog(void);
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extern void efi_call_phys_epilog(void);
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extern void efi_unmap_memmap(void);
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extern void efi_memory_uc(u64 addr, unsigned long size);
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extern void __init efi_map_region(efi_memory_desc_t *md);
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extern void __init efi_map_region_fixed(efi_memory_desc_t *md);
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extern void efi_sync_low_kernel_mappings(void);
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extern int efi_setup_page_tables(unsigned long pa_memmap, unsigned num_pages);
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extern void efi_cleanup_page_tables(unsigned long pa_memmap, unsigned num_pages);
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extern void __init old_map_region(efi_memory_desc_t *md);
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extern void __init runtime_code_page_mkexec(void);
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extern void __init efi_runtime_mkexec(void);
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extern void __init efi_dump_pagetable(void);
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extern void __init efi_apply_memmap_quirks(void);
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struct efi_setup_data {
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u64 fw_vendor;
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u64 runtime;
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u64 tables;
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u64 smbios;
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u64 reserved[8];
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};
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extern u64 efi_setup;
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#ifdef CONFIG_EFI
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static inline bool efi_is_native(void)
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{
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return IS_ENABLED(CONFIG_X86_64) == efi_enabled(EFI_64BIT);
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}
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static inline bool efi_runtime_supported(void)
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{
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if (efi_is_native())
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return true;
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if (IS_ENABLED(CONFIG_EFI_MIXED) && !efi_enabled(EFI_OLD_MEMMAP))
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return true;
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return false;
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}
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extern struct console early_efi_console;
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extern void parse_efi_setup(u64 phys_addr, u32 data_len);
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#ifdef CONFIG_EFI_MIXED
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extern void efi_thunk_runtime_setup(void);
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extern efi_status_t efi_thunk_set_virtual_address_map(
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void *phys_set_virtual_address_map,
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unsigned long memory_map_size,
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unsigned long descriptor_size,
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u32 descriptor_version,
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efi_memory_desc_t *virtual_map);
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#else
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static inline void efi_thunk_runtime_setup(void) {}
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static inline efi_status_t efi_thunk_set_virtual_address_map(
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void *phys_set_virtual_address_map,
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unsigned long memory_map_size,
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unsigned long descriptor_size,
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u32 descriptor_version,
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efi_memory_desc_t *virtual_map)
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{
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return EFI_SUCCESS;
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}
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#endif /* CONFIG_EFI_MIXED */
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#else
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/*
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* IF EFI is not configured, have the EFI calls return -ENOSYS.
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*/
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#define efi_call0(_f) (-ENOSYS)
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#define efi_call1(_f, _a1) (-ENOSYS)
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#define efi_call2(_f, _a1, _a2) (-ENOSYS)
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#define efi_call3(_f, _a1, _a2, _a3) (-ENOSYS)
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#define efi_call4(_f, _a1, _a2, _a3, _a4) (-ENOSYS)
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#define efi_call5(_f, _a1, _a2, _a3, _a4, _a5) (-ENOSYS)
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#define efi_call6(_f, _a1, _a2, _a3, _a4, _a5, _a6) (-ENOSYS)
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static inline void parse_efi_setup(u64 phys_addr, u32 data_len) {}
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#endif /* CONFIG_EFI */
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#endif /* _ASM_X86_EFI_H */
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