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cc5a080c5d
EFI variables can be flagged as being accessible only within boot services. This makes it awkward for us to figure out how much space they use at runtime. In theory we could figure this out by simply comparing the results from QueryVariableInfo() to the space used by all of our variables, but that fails if the platform doesn't garbage collect on every boot. Thankfully, calling QueryVariableInfo() while still inside boot services gives a more reliable answer. This patch passes that information from the EFI boot stub up to the efi platform code. Signed-off-by: Matthew Garrett <matthew.garrett@nebula.com> Signed-off-by: Matt Fleming <matt.fleming@intel.com>
133 lines
4.6 KiB
C
133 lines
4.6 KiB
C
#ifndef _ASM_X86_EFI_H
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#define _ASM_X86_EFI_H
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#ifdef CONFIG_X86_32
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#define EFI_LOADER_SIGNATURE "EL32"
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extern unsigned long asmlinkage efi_call_phys(void *, ...);
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#define efi_call_phys0(f) efi_call_phys(f)
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#define efi_call_phys1(f, a1) efi_call_phys(f, a1)
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#define efi_call_phys2(f, a1, a2) efi_call_phys(f, a1, a2)
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#define efi_call_phys3(f, a1, a2, a3) efi_call_phys(f, a1, a2, a3)
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#define efi_call_phys4(f, a1, a2, a3, a4) \
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efi_call_phys(f, a1, a2, a3, a4)
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#define efi_call_phys5(f, a1, a2, a3, a4, a5) \
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efi_call_phys(f, a1, a2, a3, a4, a5)
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#define efi_call_phys6(f, a1, a2, a3, a4, a5, a6) \
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efi_call_phys(f, a1, a2, a3, a4, a5, a6)
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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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#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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#define efi_call_virt0(f) efi_call_virt(f)
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#define efi_call_virt1(f, a1) efi_call_virt(f, a1)
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#define efi_call_virt2(f, a1, a2) efi_call_virt(f, a1, a2)
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#define efi_call_virt3(f, a1, a2, a3) efi_call_virt(f, a1, a2, a3)
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#define efi_call_virt4(f, a1, a2, a3, a4) \
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efi_call_virt(f, a1, a2, a3, a4)
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#define efi_call_virt5(f, a1, a2, a3, a4, a5) \
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efi_call_virt(f, a1, a2, a3, a4, a5)
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#define efi_call_virt6(f, a1, a2, a3, a4, a5, a6) \
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efi_call_virt(f, a1, a2, a3, a4, a5, a6)
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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 efi_call0(void *fp);
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extern u64 efi_call1(void *fp, u64 arg1);
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extern u64 efi_call2(void *fp, u64 arg1, u64 arg2);
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extern u64 efi_call3(void *fp, u64 arg1, u64 arg2, u64 arg3);
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extern u64 efi_call4(void *fp, u64 arg1, u64 arg2, u64 arg3, u64 arg4);
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extern u64 efi_call5(void *fp, u64 arg1, u64 arg2, u64 arg3,
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u64 arg4, u64 arg5);
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extern u64 efi_call6(void *fp, u64 arg1, u64 arg2, u64 arg3,
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u64 arg4, u64 arg5, u64 arg6);
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#define efi_call_phys0(f) \
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efi_call0((void *)(f))
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#define efi_call_phys1(f, a1) \
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efi_call1((void *)(f), (u64)(a1))
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#define efi_call_phys2(f, a1, a2) \
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efi_call2((void *)(f), (u64)(a1), (u64)(a2))
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#define efi_call_phys3(f, a1, a2, a3) \
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efi_call3((void *)(f), (u64)(a1), (u64)(a2), (u64)(a3))
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#define efi_call_phys4(f, a1, a2, a3, a4) \
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efi_call4((void *)(f), (u64)(a1), (u64)(a2), (u64)(a3), \
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(u64)(a4))
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#define efi_call_phys5(f, a1, a2, a3, a4, a5) \
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efi_call5((void *)(f), (u64)(a1), (u64)(a2), (u64)(a3), \
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(u64)(a4), (u64)(a5))
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#define efi_call_phys6(f, a1, a2, a3, a4, a5, a6) \
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efi_call6((void *)(f), (u64)(a1), (u64)(a2), (u64)(a3), \
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(u64)(a4), (u64)(a5), (u64)(a6))
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#define efi_call_virt0(f) \
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efi_call0((void *)(efi.systab->runtime->f))
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#define efi_call_virt1(f, a1) \
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efi_call1((void *)(efi.systab->runtime->f), (u64)(a1))
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#define efi_call_virt2(f, a1, a2) \
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efi_call2((void *)(efi.systab->runtime->f), (u64)(a1), (u64)(a2))
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#define efi_call_virt3(f, a1, a2, a3) \
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efi_call3((void *)(efi.systab->runtime->f), (u64)(a1), (u64)(a2), \
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(u64)(a3))
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#define efi_call_virt4(f, a1, a2, a3, a4) \
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efi_call4((void *)(efi.systab->runtime->f), (u64)(a1), (u64)(a2), \
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(u64)(a3), (u64)(a4))
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#define efi_call_virt5(f, a1, a2, a3, a4, a5) \
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efi_call5((void *)(efi.systab->runtime->f), (u64)(a1), (u64)(a2), \
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(u64)(a3), (u64)(a4), (u64)(a5))
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#define efi_call_virt6(f, a1, a2, a3, a4, a5, a6) \
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efi_call6((void *)(efi.systab->runtime->f), (u64)(a1), (u64)(a2), \
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(u64)(a3), (u64)(a4), (u64)(a5), (u64)(a6))
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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 unsigned long x86_efi_facility;
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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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struct efi_var_bootdata {
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struct setup_data data;
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u64 store_size;
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u64 remaining_size;
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u64 max_var_size;
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};
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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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#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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#endif /* CONFIG_EFI */
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#endif /* _ASM_X86_EFI_H */
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